JPH08331606A - Projection type stereoscopic image display system - Google Patents

Abstract

PURPOSE: To provide a stereoscopic image satisfactory for an observer wearing polarizing spectacles while simplifying adjustment by matching the optical axis of light of an image for the right eye with the optical axis of the light of an image for the left eye. CONSTITUTION: A visible beam is generated by a light source part 7, and this visible beam is splitted into two beams by an optical path separating/ synthesizing part 8 and respectively made incident on a P polarized light modulating optical part 10 and an S polarized light modulating optical part 11. At the same time, the images for right and left eyes having the same optical axis are synthesized by fetching S polarized light modulated light (the light of the image for right eye) and P polarized light modulated light (the light of the image for the left eye) emitted from these P polarized light modulating optical part 10 and S polarized light modulating optical part 11, these images for the right eye and the left eye are projected on a screen 2 by a projecting optical part 9, and the observer wearing polarizing spectacles 3 watches the stereoscopic image.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a projection type stereoscopic image display system for showing an observer wearing polarizing glasses with a stereoscopic image such as monochrome or full color.

SUMMARY OF THE INVENTION The present invention modulates P-polarized light in white light with an image for the right eye, and S-polarized light in white light with an image for the left eye by a single image magnifying projection display. The image for the right eye, which is obtained by modulating
By combining the image for the left eye and the image for the right eye and the image for the left eye, and projecting this on the screen, the stereoscopic image is shown to the observer wearing the polarized glasses.

[0003]

2. Description of the Related Art Conventionally, as a projection type stereoscopic image display system in which a right-eye image and a left-eye image are projected on a screen so as to show a stereoscopic image to a viewer, "Reference 1:
(JMHaggerty, S.Reinsch, WPBleha, RDSterling:
“Stereoscopic large screen displays using liquid
crystal light valve projectors "SPIE Vol.1255, pp.11
4-122 (1990)) "is known.

FIG. 35 is a block diagram showing the outline of the projection type stereoscopic image display system described in this document 1.

A projection type stereoscopic image display system 501 shown in this figure includes a right eye image magnifying projection display 502,
Image magnifying projection display 503 for the left eye and 1 / for the right eye
A two-wave plate 504, a left-eye half-wave plate 505, a screen 506, and polarizing glasses 507 are provided, and a right-eye image is generated by the right-eye image magnifying projection display 502, and the right-eye image is generated. It is polarized by the half-wave plate for the eye 504 and projected on the screen 506, and an image for the left eye is generated by the image magnifying projection display for the left eye 503, and this is generated by the half-wave plate for the left eye 505. While polarizing and projecting on the screen 506, the image for the right eye projected on the screen 506 is passed through the right eye side lens 508 of the polarizing glasses 507 to the right eye of the person wearing the polarizing glasses 507. The left eye image projected on the screen 506 with the polarized glasses 5
The polarized eyeglasses 50 through the left eye side lens 509 of 07.
Guide to the left eye of the person wearing 7 and show this person a stereoscopic image.

The image magnifying projection display 502 for the right eye is a cathode ray tube 51 for displaying the image for the right eye as shown in FIG.
0, the spatial light modulation that captures the right-eye image emitted from the CRT 510 by the one surface side and reads the right-eye image and emits the light from the other surface side when the reading light is incident on the other surface side. An element 511, a discharge lamp 512 for generating reading light (reading light), two cold mirrors 513 for transmitting visible light and transmitting infrared light in the reading light emitted from the discharge lamp 512, 51
4, an ultraviolet light cut filter 515 that removes ultraviolet light from the light from which infrared light has been removed by these cold mirrors 513 and 514 and transmits only visible light, and a visible light that has passed through this ultraviolet light cut filter 515. And a polarization beam splitter 516 that transmits light having a specific polarization direction contained in the light.

Further, the image magnifying projection display 502 for the right eye reflects the light having only a specific polarization direction (light of S polarization only) transmitted through the polarization beam splitter 516 to reflect the spatial light modulator 511. Of the polarization mirror 517 that allows the phase-modulated right-eye image (light of P polarization only) emitted from the other surface side to pass through, and the specific light reflected by the polarization mirror 517. Of the light having only the polarization direction, the light having a specific wavelength range is transmitted to be incident on the other surface of the spatial light modulator 511, and the phase-modulated right eye emitted from the other surface. Of the image for use, only the color filter 518 which transmits only the light within a specific wavelength range and makes it enter the polarizing mirror 517, and the image for the right eye (P-polarized wave) which has passed through the polarizing mirror 517. Captures Hikari Mino), this through the right eye half-wave plate 504, the screen 50
6 and a projection lens 519 for projecting light onto the image plane.

Then, while the image for the right eye is generated by the cathode ray tube 510 and is made incident on one surface side of the spatial light modulator 511, the discharge lamp 512, the two cold mirrors 513 and 514, the ultraviolet light cut filter 515 and The polarization beam splitter 516 generates visible light having a specific polarization direction, and this is converted into light having a specific polarization direction and a specific wavelength by a polarization mirror 517 and a color filter 518. The phase difference-modulated right-eye image (P-polarized light) emitted from the other surface side of the spatial light modulation element 511 by the color filter 518, the polarization mirror 517, and the projection lens 519 while being incident on the other surface side of the modulation element 511. (Wave light only), and receives the half-wave plate 504 for the right eye.
To project it on the screen 506.

In this case, the spatial light modulator 511 is shown in FIG.
, A fiber plate substrate 520, a first transparent electrode 521, a photoconductive layer 522, a light absorption layer 523,
In the device, the dielectric multilayer mirror 524, the first alignment layer 525, the nematic liquid crystal layer 526, the second alignment layer 527, the second transparent electrode 528, and the quartz substrate 529 are sequentially adhered and laminated. If the AC voltage is applied between the first transparent electrode 521 and the second transparent electrode 528 by the AC power source 530, the writing light containing the optical information is made incident on the fiber plate substrate 520 side, and By changing the resistance value of the conductive layer 522, the sealing layers 531 and 5 are
Optical information is two-dimensionally written in the nematic liquid crystal layer 526 sealed with 32, and the optical information (display light) written in the nematic liquid crystal layer 526 is read by the reading light incident on the quartz substrate 529 side. Is emitted as an image for the right eye.

At this time, the nematic liquid crystal layer 526 has a first transparent electrode 521 and a second transparent electrode 5 as shown in FIG.
When a voltage is not applied between the liquid crystal molecules 53
The major axis direction of 3 is in the XY plane, and the angle θ formed by the normal line of the surface of the dielectric multilayer mirror 524 and the major axis of the liquid crystal molecule 533 is about 2 degrees, which is homeotropic alignment. Therefore, when a voltage is applied between the first transparent electrode 521 and the second transparent electrode 528, if the dielectric anisotropy of the liquid crystal molecules 533 is negative, the electric field generated by the applied voltage increases. As a result, the angle θ is increased and the long axes of the liquid crystal molecules 533 are aligned along the surface of the dielectric multilayer mirror 524.

The readout light linearly polarized on the XY plane and at an angle of 45 degrees from the X axis is the nematic liquid crystal layer 526.
Of the liquid crystal molecule 533 in the uniaxial direction when incident on
Since the linearly polarized light that is influenced only by o and the linearly polarized light that is influenced by both the refractive indices ne and no in the major axis direction of the liquid crystal molecule 533 are propagated in the nematic liquid crystal layer 526, The phase difference (retardation) generated between the two linearly polarized lights changes according to the magnitude of the voltage applied between the transparent electrode 521 and the second transparent electrode 528.

Further, the right-eye half-wave plate 504 receives the right-eye image emitted from the right-eye image magnifying projection display 502, and makes the polarization plane of the right-eye image 1 / direction in one direction. The light is transmitted while being rotated by 2 and projected onto the screen 506.

Also, the image magnifying projection display 5 for the left eye
Reference numeral 03 denotes the same structure as the right-eye image magnifying projection display 502. The cathode-ray tube 510 generates a left-eye image by the cathode ray tube 510 and makes it enter the one surface side of the spatial light modulator 511, while the discharge lamps 512, 2 are provided. The cold mirrors 513 and 514, the ultraviolet light cut filter 515, and the polarization beam splitter 516 generate visible light having a specific polarization direction, and the polarization mirror 517 and the color filter 518 generate a specific polarization direction and a specific wavelength. Of the spatial light modulation element 511 is made incident on the other surface side of the spatial light modulation element 511 as reading light, and is emitted from the other surface side of the spatial light modulation element 511 by the color filter 518, the polarization mirror 517 and the projection lens 519. Received the phase-modulated image for the left eye (light of P polarization only) The way of the left eye half-wave plate 505, is projected on the screen 506.

The half-wave plate 505 for the left eye is the one for the right eye 1
Similarly to the half-wave plate 504, receiving the image for the left eye emitted from the image magnifying projection display for the left eye 503,
The polarization plane of the left-eye image is transmitted while being rotated by 1/2 in the other direction, and is projected on the screen 506.

The screen 506 projects an image for the right eye projected through the half-wave plate 504 for the right eye and an image for the right eye projected through the half-wave plate 505 for the left eye. The right-eye image having a polarization direction orthogonal to the polarization direction of the
To the lens 508 for the right eye and the lens 509 for the left eye.

The polarized glasses 507 include a right-eye lens 508 that transmits light having the same polarization direction as the polarization direction of the right-eye image displayed on the screen 506, and the left-eye displayed on the screen 506. A left-eye lens 509 that transmits light having the same polarization direction as that of the right-eye image, and the right-eye image reflected by the screen 506 by the right-eye lens 508 is transmitted through the polarized glasses 507. While leading to the right eye of the observer who is wearing, the image for the left eye reflected by the screen 506 by the lens for the left eye 509 is transmitted and guided to the left eye of the observer, and a stereoscopic image is given to this observer. show.

[0017]

However, the above-mentioned conventional projection type stereoscopic image display system 501 has the following problems.

<First Problem> First, when displaying a stereoscopic image, the image enlargement / projection display 502 for the right eye and the half-wave plate 504 for the right eye, the image enlargement / projection display 503 for the left eye, and the left eye are displayed. Therefore, there is a problem in that the projection type stereoscopic image display system 501 as a whole becomes large-scaled and the cost becomes high because the half-wave plate 505 is required.

In particular, in order to display a full-color image, a color separation optical system is inserted between the cold mirrors 513 and 514 and the polarization beam splitter 516 to convert white light into red light, green light and blue light. The three primary colors are separated, and one of the primary colors is used, a red image magnifying projection display for the right eye, a green image magnifying projection display for the right eye, a blue image magnifying projection display for the right eye, and a red image magnifying display for the left eye Since a projection display, a left-eye green image magnifying projection display, and a left-eye blue image magnifying projection display are required, there has been a problem that the cost of the entire projection-type stereoscopic image display system increases dramatically.

<Second Problem> Further, in the conventional projection type stereoscopic image display system 501, the right-eye image enlargement / projection display 502 and the left-eye image enlargement / projection display 503 are directly arranged on the screen 506. Side by side,
Since they cannot be arranged, the spatial light modulators 51 in the right-eye image enlargement / projection display 502 and the left-eye image enlargement / projection display 503 are arranged as shown in FIG.
The optical axis 534 of 1 is not perpendicular to the plane of the screen 506. Therefore, in the peripheral portion of the screen 506, the image forming surface of the projection lens 519 and the surface of the screen 506 are greatly separated from each other, and the image for the right eye (or the image for the left eye) emitted from the projection lens 519. There is a problem that the light of the above image is formed in front of or behind the screen surface and the resolution of the peripheral portion is lowered. Note that, in FIG. 39, the polarization mirror 517, the color filter 518, the cathode ray tube 510, and the reading light incident on the polarization mirror 517 are omitted for the sake of simplicity.

<Third Problem> Further, in the conventional projection type stereoscopic image display system 501, the image magnifying and projecting display 502 for the right eye and the image magnifying and projecting display 503 for the left eye are installed, and right on the screen 506. When the image for the eye and the image for the left eye are superimposed, the overlapping position (registration) of the image for the right eye and the image for the left eye must be adjusted, which complicates the installation work. There was a problem.

<Fourth Problem> Further, in the conventional projection type stereoscopic image display system 501, when enlarging or reducing the projection image projected on the screen 506, the projection of the image magnifying projection display 502 for the right eye is performed. Since the optical system and the projection optical system of the left-eye image magnifying projection display 503 must be adjusted at the same time, the screen 506
When it is possible to magnify or reduce the projection image projected on the right eye image magnifying projection display 502
There is a problem in that a mechanism for interlocking the projection lens 519 of No. 1 and the projection lens 519 of the left-eye image magnifying projection display 503 must be provided.

<Fifth Problem> Further, in the conventional projection type stereoscopic image display system 501, when the projection image projected on the screen 506 is made into a high-definition image, the image magnifying projection display 502 for the right eye is used. The optical characteristics such as the enlargement / reduction ratio of the projection optical system and the various aberrations and the optical characteristics such as the enlargement / reduction ratio of the projection optical system of the left-eye image enlargement / projection display 503 and the various aberrations should be aligned as much as possible. There was a problem of not becoming.

<Sixth Problem> Further, in the conventional projection type stereoscopic image display system 501, on the front side of the screen 506, an image magnifying projection display 502 for the right eye and a half-wave plate 504 for the right eye, The left-eye image magnifying projection display 503 and the left-eye half-wave plate 505 are arranged side by side, and the right-eye image and the left-eye image must be projected on the screen 506. The exit surface (the other surface) of the spatial light modulator 511 provided in the eye image magnifying projection display 502 and the exit surface of the spatial light modulator element 511 provided in the left eye image magnifying projection display 503 (the other surface). Surface) and screen 5
The plane of No. 06 does not become parallel, and the right side length of the right-eye image (or the left-eye image) projected on the screen 506 is different from the left side length, which causes trapezoidal distortion. was there.

As described above, on the near side of the screen 506, the right-eye image magnifying projection display 502 and the right-eye half-wave plate 504, the left-eye image magnifying-projection display 503, and the left-eye 1 / Since the right-eye image and the left-eye image are projected on the screen 506 by arranging the two-wavelength plate 505 side by side, the distortion of the right-eye image projected on the screen 506 and the left image The distortion of the ophthalmic image is often different, and there is a problem that a distortion adjustment circuit for adjusting these distortions must be provided.

In view of the above circumstances, the present invention is directed to the first aspect described above.
The object of the present invention is to provide a projection type stereoscopic image display system that can solve the sixth problem.

[0027]

In order to achieve the above object, the present invention provides, in a projection type stereoscopic image display system according to claim 1, at least a visible light source unit for generating visible light,
An image display for the right eye that displays the image for the right eye to be displayed, while receiving the image for the right eye displayed on the image display for the right eye on one surface side, and the other surface side on the image for the right eye After modulating the light incident on, the spatial light modulator for emitting the image for the right eye obtained by this modulation operation from the other surface side, and either the P polarized light or the S polarized light is incident. At this time, a polarization modulation optical unit for the right eye that modulates this and emits an image for the right eye, and at least an image display for the left eye that displays the image for the left eye that is the display target, for the left eye on the one side. While receiving the image for the left eye displayed on the image display and modulating the light incident on the other surface side with the image for the left eye, the image for the left eye obtained by this modulation operation is displayed on the other surface. Has a spatial light modulator that emits light from the side, and either P-polarized light or S-polarized light When the light enters, the left-eye polarization modulation optical unit that modulates the light to emit the left-eye image, and the visible light obtained by the visible light source unit is taken into P-polarized light and S-polarized light. While separating and respectively entering the polarization modulation optical section for the right eye and the polarization modulation optical section for the left eye,
While capturing the right-eye image and the left-eye image having different polarization directions emitted from the right-eye polarization modulation optical unit and the left-eye polarization modulation optical unit, respectively, the right-eye image and the left-eye image Path combining / combining section for combining and outputting the image for use, a projection optical section for enlarging and projecting the image for the right eye and the image for the left eye from the optical path separating / combining section, and the projection optical section. A screen that reflects or transmits while maintaining the polarization directions of the right-eye image and the left-eye image, and the right-eye image and the left-eye image that are reflected or transmitted by the screen and have different polarization directions from each other It is characterized in that it is provided with polarized glasses for leading to each of the right eye and the left eye.

Further, in the projection type stereoscopic image display system according to claim 2, a white light source for generating white light and at least a B image for the right eye, a G image for the right eye, and a R for the right eye to be displayed. Three image display devices for the right eye each displaying an image, R for the right eye displayed on each of the image display devices for the right eye on one surface side
While receiving an image, a G image for the right eye, and a B image for the right eye, respectively, the R light for the right eye, the G image for the right eye, the R light incident on the other surface side in the B image for the right eye, the G light, After modulating each of the B lights, there are three spatial light modulators for respectively emitting the R image for the right eye, the G image for the right eye, and the B image for the right eye obtained by this modulation operation from the other surface side. , P-polarized RGB light or S-polarized RGB light is incident, a right-eye RGB polarization modulation optical unit that modulates the P-polarized RGB light and emits a right-eye RGB image, and at least the left to be displayed. R image for eye,
Three left-eye image display devices that respectively display a left-eye G image and a left-eye B image, a left-eye R image displayed on each of the left-eye image display devices on one side, and a left-eye G image The image and the left-eye B image are respectively received, and the left-eye R image and the left-eye G image are received.
Image, R light incident on the other surface side in the B image for the left eye, G
After modulating the light and the B light respectively, three spatial light modulators for respectively emitting the R image for the left eye, the G image for the left eye, and the B image for the left eye obtained by this modulation operation from the other surface side are provided. A left-eye RGB polarization modulation optical section that modulates the P-polarized RGB light or the S-polarized RGB light to emit a left-eye RGB image, and the white light source section. After the white light obtained by the above is taken in and separated into P polarized light and S polarized light, it is separated into R light, G light and B light, and P light
The polarized RGB light and the S-polarized RGB light are used for the right eye RG.
The B-polarization modulation optical section and the left-eye RGB polarization modulation optical section are made incident on each other while the right-angle RGB polarization modulation optical section and the left-eye RGB polarization modulation optical section are respectively emitted from each other. A right-eye RGB image and a left-eye RGB image having different directions are taken in, and an optical path separating / combining unit that combines and outputs the right-eye RGB image and the left-eye RGB image, and the optical path separating / combining unit. A projection optical unit that magnifies and projects the right-eye RGB image and the left-eye RGB image from the combining unit, and the right-eye RG emitted from the projection optical unit.
A screen that reflects or transmits while maintaining the polarization directions of the B image and the RGB image for the left eye, and the RGB image for the right eye and the RGB image for the left eye that have different polarization directions reflected or transmitted by the screen It is characterized in that it is provided with polarized glasses which respectively guide the right eye and the left eye.

According to a third aspect of the present invention, in the projection type stereoscopic image display system according to the second aspect, the optical path separating / combining section has a flat plate dichroic mirror, a square dichroic mirror, and an "L" shape. Color separating / combining device using any of the dichroic mirrors, flat polarization beam splitter, square polarization beam splitter,
It is characterized in that it is configured by two-dimensionally combining with a PS polarization separating / combining device using any one of the “L” -shaped polarization beam splitters.

According to a fourth aspect of the present invention, in the projection type stereoscopic image display system according to the second aspect, the optical path separating / combining section has a flat plate dichroic mirror, a square dichroic mirror, and an "L" shape. Color separating / combining device using any of the dichroic mirrors, flat polarization beam splitter, square polarization beam splitter,
It is characterized in that it is configured by three-dimensionally combining with a PS polarization separating / combining device using any one of the “L” -shaped polarization beam splitters.

According to a fifth aspect of the present invention, in the projection type stereoscopic image display system according to the second, third and fourth aspects, the optical path separating / combining section captures the white light obtained by the white light source section and R After being separated into light, G light, and B light, they are separated into P-polarized light and S-polarized light into P-polarized RGB light and S-polarized RGB light. The right-eye RGB polarization modulation optics are respectively made to enter the left-eye RGB polarization modulation optics while being emitted respectively from the right-eye RGB polarization modulation optics and the left-eye RGB polarization modulation optics. The RGB image and the RGB image for the left eye are captured, and the RGB image for the right eye and the RGB image for the left eye are combined and emitted.

Further, in claim 6, claims 1, 2, 3,
In the projection type stereoscopic image display system according to any one of 4 and 5, the optical path separation / synthesis unit is the right-eye polarization modulation optical unit or the right-eye RGB polarization modulation optical unit and the left-eye polarization modulation optical unit. A plurality of right-eye images or right-eye RGB images having different polarization directions, which are respectively emitted from the image forming section or the left-eye RGB polarization modulation optical section, and a left-eye image or a left-eye RGB image, and a plurality of After synthesizing the right-eye image or right-eye RGB image and the left-eye image or left-eye RGB image into circularly polarized light in mutually different rotation directions by the 1/4 wavelength device, the light is emitted.
The right-eye RGB image and the left-eye RGB image of circularly polarized light having different rotation directions reflected or transmitted by the screen by polarizing glasses in which a quarter-wave plate or a quarter-wave film is laminated on the polarizing glasses. Is converted into two linearly polarized lights orthogonal to each other and guided to the right eye and the left eye of the observer, respectively.

Further, in claim 7, claims 1, 2, 3,
In the projection-type stereoscopic image display system according to any one of 4, 5, and 6, the right-eye image and the left-eye image which are arranged between the projection optical unit and the screen and are emitted from the projection optical unit. A reflection mechanism for reflecting the image, or the RGB image for the right eye and the RGB image for the left eye, and making the optical path longer than the distance between the projection optical unit and the screen to increase the enlargement ratio. Is characterized by.

Further, in claim 8, claims 1, 2, 3,
The projection-type stereoscopic image display system according to any one of 4, 5, 6, and 7, wherein the input terminal for the right eye receives the input image signal for the right eye, and the left eye receives the input image signal for the left eye. Input terminal, and when displaying a stereoscopic image, supplies the right-eye image signal input to the right-eye input terminal to the right-eye polarization modulation optical section and the right-eye RGB polarization modulation optical section. Together with supplying the left eye image signal input to the left eye input terminal to the left eye polarization modulation optical section, the left eye RGB polarization modulation optical section, when displaying a non-stereo image, the Select either the right-eye image signal input to the right-eye input terminal or the left-eye image signal input to the left-eye input terminal, the right-eye polarization modulation optical unit, the RGB polarization modulation optical unit for the right eye, the polarization modulation optical unit for the left eye It is characterized in that a switch group supplies the left-eye RGB modulating optical unit.

Further, in claim 9, claim 1, 2, 3,
In the projection type stereoscopic image display system according to any one of 4, 5, 6, 7, and 8, a spatial light modulation element that constitutes the right-eye polarization modulation optical section or the right-eye RGB polarization modulation optical section, and It is characterized in that the spatial light modulation element forming the left-eye polarization modulation optical section or the left-eye RGB polarization modulation optical section and the polarization beam splitter forming the optical path separating / combining section are brought into close contact with each other.

Further, in claim 10, claims 1, 2 and
In the projection type stereoscopic image display system according to any one of 3, 4, 5, 6, 7, and 8, an image display for the right eye, which constitutes the polarization modulation optical section for the right eye or the RGB polarization modulation optical section for the right eye. And a polarization-modulating optical part for the right eye or an R for the right eye
A spatial light modulation element forming a GB polarization modulation optical section, a left eye image display forming the left eye polarization modulation optical section or a left eye RGB polarization modulation optical section, and the left eye polarization modulation optical section Alternatively, it is characterized in that the spatial light modulator which constitutes the RGB polarization modulation optical section for the left eye and the polarization beam splitter which constitutes the optical path separation / synthesis section are brought into close contact with each other.

Further, in claim 11, claims 1, 2 and
In the projection type stereoscopic image display system according to any one of 3, 4, 5, 6, 7, and 8, an image display for the right eye, which constitutes the polarization modulation optical section for the right eye or the RGB polarization modulation optical section for the right eye. And a polarization-modulating optical part for the right eye or an R for the right eye
An image display for the left eye, which is in close contact with the spatial light modulation element that constitutes the GB polarization modulation optical section, and constitutes the polarization modulation optical section for the left eye or the RGB polarization modulation optical section for the left eye, and the left eye It is characterized in that it is brought into close contact with the spatial light modulator which constitutes the polarization modulation optical section or the RGB polarization modulation optical section for the left eye.

In the twelfth aspect, the first, second, and
In the projection type stereoscopic image display system according to any one of 3, 4, 5, 6, 7, 8, 9, 10, and 11, the right-eye polarization modulation optical section or the right-eye RGB polarization modulation optical section is configured. As the image display for the right eye, the image display for the left eye constituting the polarization modulation optical section for the left eye or the RGB polarization modulation optical section for the left eye, and having a spectrum to which the photoconductive layer of the spatial light modulator is sensitive. A Braun tube that emits light and is arranged apart from the spatial light modulator is used.

Further, in claim 13, claims 1, 2 and
The projection type stereoscopic image display system according to any one of 3, 4, 5, 6, 7, 8, 9, 10 and 11, wherein the image display device for the right eye, which constitutes the polarization modulation optical unit for the right eye, An image display for the left eye that constitutes the polarization modulation optical unit for the left eye, three image display units for the right eye that configure the RGB polarization modulation optical unit for the right eye, and the RGB polarization modulation optical unit for the left eye As the three image display devices for the left eye, a cathode ray tube which has a fiber plate on the image display surface and emits light having a spectrum sensitive to the photoconductive layer of the spatial light modulator is used, and has a refractive index close to that of the fiber plate. On the fiber plate through the refractive index matching liquid layer having a refractive index,
The spatial light modulator is laminated.

Further, in claim 14, claims 1, 2 and
In the projection type stereoscopic image display system according to any one of 3, 4, 5, 6, 7, 8, 9, 10, and 11, the right-eye polarization modulation optical section or the right-eye RGB polarization modulation optical section is configured. A liquid crystal display is used as an image display for the right eye, a left eye polarization modulation optical section for the left eye, or a left eye RGB polarization modulation optical section for the left eye.

According to a fifteenth aspect, in the projection type stereoscopic image display system according to the fourteenth aspect, a light having a spectrum sensitive to the photoconductive layer of the spatial light modulator is provided on the back side of each liquid crystal display. The respective light sources for emitting light are arranged, and by the light emitted from these light sources, an image display for the right eye that constitutes the polarization modulation optical section for the right eye, and for the left eye that constitutes the polarization modulation optical section for the left eye Liquid crystal forming an image display, three right-eye image display units forming the right-eye RGB polarization modulation optical unit, and three left-eye image display units forming the left-eye RGB polarization modulation optical unit The display is backlit.

In the sixteenth aspect, the fourteenth and fifteenth aspects are provided.
In the projection type stereoscopic image display system according to any one of, a right-eye image display constituting the right-eye polarization modulation optical unit, a left-eye image display constituting the left-eye polarization modulation optical unit, 3 which constitutes the RGB polarization modulation optical unit for the right eye
One right-eye image display, three left-eye image displays that form the left-eye RGB polarization modulation optical section, and a light source that emits light having a spectrum sensitive to the photoconductive layer of the spatial light modulator. Using a liquid crystal display having a fiber plate on the image display surface and displaying an image by being back-illuminated by the light emitted from the light source, for refractive index matching having a refractive index close to that of the fiber plate. The spatial light modulation element is laminated on the fiber plate via a liquid layer.

Further, in claim 17, claims 14 and 1 are provided.
5. In the projection type stereoscopic image display system according to any one of 5 and 16, as the liquid crystal display, a nematic liquid crystal,
Liquid crystal display using guest-host liquid crystal in which dichroic dye is added to one or more kinds of liquid crystal selected from the group consisting of cholesteric liquid crystal, smectic liquid crystal, and mixture of these liquid crystals, or nematic liquid crystal, cholesteric liquid crystal, smectic liquid crystal Ordinary refractive index of one or more liquid crystals selected from the group consisting of liquid crystals and mixtures of these liquid crystals,
The extraordinary refractive index or the refractive index when the liquid crystal is randomly aligned is equivalent to the above-mentioned 2 in the resin having the same refractive index.
A guest-host type liquid crystal / resin composite in which the liquid crystal added with a color dye is dispersed, or a liquid crystal display using a guest / host type liquid crystal / resin composite in which the resin is dispersed in the liquid crystal. And illuminating the liquid crystal display with a light having a spectrum that the photoconductive layer of the spatial light modulator is sensitive to and that the dichroic dye absorbs. It is characterized in that the light is incident on the photoconductive layer of the light modulation element.

In the eighteenth aspect, the fourteenth and first aspects are provided.
In the projection type stereoscopic image display system described in any one of 5, 16 and 17, a flat light source is used as the light source for back-illuminating the liquid crystal display.

According to a nineteenth aspect, in the projection type stereoscopic image display system according to the eighteenth aspect, the light source formed in the flat plate shape is a discharge lamp and a concave mirror arranged on the back surface of the discharge lamp. It is characterized in that it is arranged on the front surface of the discharge lamp and is constituted by a diffuser plate which diffuses and directly transmits the light emitted from the discharge lamp and the light reflected by the concave mirror.

According to a twentieth aspect, in the projection type stereoscopic image display system according to the eighteenth aspect, the light source formed in the flat plate shape has a reflection plate formed in the flat plate shape and a front side of the reflection plate. A discharge lamp arranged on one side, and arranged on the front side of the discharge lamp so as to face the reflection plate,
It is characterized in that it is constituted by a diffuser plate that diffuses and transmits the light directly emitted from the discharge lamp and the light reflected by the reflector.

According to a twenty-first aspect, in the projection type stereoscopic image display system according to the eighteenth aspect, the light source formed in the flat plate shape is formed in a flat plate shape, and emits EL light when an electric field is applied. It is characterized by being composed of layers.

Further, in claim 22, claims 1, 2 and
3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 1
3, 14, 15, 16, 17, 18, 19, 20, 21
In the projection type stereoscopic image display system according to any one of items 1 to 5, the spatial light modulator is one or more selected from the group consisting of a nematic liquid crystal, a cholesteric liquid crystal, a smectic liquid crystal, or a mixture of these liquid crystals as a light modulating layer. It is characterized by using the liquid crystal of.

Further, in claim 23, claims 1, 2 and
3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 1
3, 14, 15, 16, 17, 18, 19, 20, 2
In the projection type stereoscopic image display system according to any one of 1 and 22, the spatial light modulation element includes a substrate formed of glass or a fiber plate, a first transparent electrode laminated on the substrate, and a first transparent electrode. 1 Photoconductive layer laminated on transparent electrode, light absorption layer laminated on this photoconductive layer, dielectric multilayer mirror laminated on this light absorption layer, and dielectric multilayer mirror When the incident light is P-polarized light according to the light intensity of the optical image which is stacked on the photoconductive layer, the polarization state is changed from P-polarized light to S-polarized light. If the incident light is S-polarized light, it is changed from S-polarized light to P
An input light image incident through the substrate is input to the photoconductive layer, which includes an optical modulation layer for converting the polarized light to a light having an arbitrary polarization state and a second transparent electrode laminated on the optical modulation layer. When the light that has been written and is incident on the second transparent electrode side is P polarized light, it is converted into light having an arbitrary polarization state from P polarized light to S polarized light, and the incident light is S polarized light.
When it is polarized light, it is characterized in that it is converted into light having an arbitrary polarization state from S-polarized light to P-polarized light and emitted from the second transparent electrode side.

Further, in claim 24, claim 1, 2,
3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 1
3, 14, 15, 16, 17, 18, 19, 20, 2
The projection type stereoscopic image display system according to any one of 1, 22, and 23, wherein the right-eye polarization modulation optical section, the left-eye polarization modulation optical section, the right-eye RGB polarization modulation optical section, the left-eye. Of the RGB polarization modulation optical section for use in the optical element and the optical elements of the optical separating / synthesizing section, all surfaces of which are in contact with air, or a part of the surfaces are laminated with an antireflection film. Is characterized by.

[0051]

In the projection type stereoscopic image display system according to the first aspect of the present invention, the visible light source section generates the visible light while the optical path separating / combining section converts the visible light obtained by the visible light source section. After being captured and separated into P-polarized light and S-polarized light, at least a right-eye image display for displaying a right-eye image to be displayed, which is displayed on one surface side of the right-eye image display. While receiving the image for the right eye,
After modulating the light incident on the other side with this image for the right eye,
It has a spatial light modulator for emitting the image for the right eye obtained by this modulation operation from the other surface side, and when either P-polarized light or S-polarized light is incident, it is modulated to be used for the right eye. A polarization modulation optical unit for the right eye that emits an image, and at least a left eye image display that displays a left eye image to be displayed, a left eye that is displayed on the left eye image display on one surface side. The image for the left eye is modulated, and the light incident on the other surface side is modulated by the image for the left eye, and the spatial light modulator that emits the image for the left eye obtained by this modulation operation from the other surface side is provided. Then, when either the P-polarized light or the S-polarized light is incident, the light is modulated to be incident on the left-eye polarization modulation optical unit that emits the left-eye image.

In parallel with this operation, the optical path separation / combination section for the right eye emits light from the polarization modulation optical section for the right eye and the polarization modulation optical section for the left eye, which have different polarization directions from each other. While capturing the image and the image for the left eye, by combining the image for the right eye and the image for the left eye, the projection optical unit enlarges and projects the image for the right eye and the image for the left eye on the screen, and the polarized light. The first to sixth problems described above are solved by guiding the image for the right eye and the image for the left eye which have different polarization directions reflected or transmitted through the screen by the glasses to the right eye and the left eye of the observer, respectively. To do.

Further, in the projection type stereoscopic image display system according to claim 2, while the white light source section generates white light, the optical path separating / combining section takes in the white light obtained by the white light source section and outputs the white light. After the polarized light and the S polarized light are separated, they are separated into R light, G light, and B light into P polarized RGB light and S polarized RGB light, which are at least the right to be displayed. Three image display devices for the right eye that respectively display an R image for the eye, a G image for the right eye, and a B image for the right eye, and an R image for the right eye displayed on each of the image display devices for the right eye on one surface side. , The right-eye G image and the right-eye B image, respectively, and the R-light, the G-light, and the B-light incident on the other surface side of the right-eye R image, the right-eye G image, and the right-eye B image, respectively. After the light is modulated, the R image for the right eye, the G image for the right eye, and the B image for the right eye obtained by this modulation operation are each described above. Has three spatial light modulator to emit from the side, when either of P polarized RGB light or S polarization RGB light is incident, RG for the right eye by modulating this
An RGB polarization modulation optical unit for the right eye that emits a B image, at least an R image for the left eye, a G image for the left eye, which is a display target,
Three image display devices for the left eye, each displaying a B image for the left eye,
The R image for the left eye, the G image for the left eye, and the B image for the left eye which are displayed on each of the left eye image display devices on one surface side are respectively received, and the R image for the left eye and the G image for the left eye are received. , For left eye B
After modulating the R light, G light, and B light incident on the other surface side in the image, the R image for the left eye, the G image for the left eye, and the B image for the left eye obtained by this modulation operation are the other surface. 3 to emit from the side
A left-eye RGB polarization modulation optical unit that has two spatial light modulators and modulates either P-polarized RGB light or S-polarized RGB light to emit a left-eye RGB image. Respectively.

In parallel with this operation, the optical path separation /
The combining unit captures the right-eye RGB image and the left-eye RGB image, which are emitted from the right-eye RGB polarization modulation optical unit and the left-eye RGB polarization modulation optical unit and have different polarization directions, respectively. Together with these right eye RG
The B image and the RGB image for the left eye are combined, and the projection optical unit enlarges and projects the RGB image for the right eye and the RGB image for the left eye from the optical path separation / combination unit on the screen, and the polarized glasses are used to display the image on the screen. RGB image for the right eye and RGB image for the left eye with different polarization directions reflected or transmitted
The first to sixth problems described above are solved by guiding the image to the right eye and the left eye of the observer, respectively.

According to a third aspect, in the projection type stereoscopic image display system according to the second aspect, a flat dichroic mirror, a square dichroic mirror, and "L".
Color separation / combiner using any one of the letter dichroic mirrors, PS polarization separation / synthesis using any one of a flat plate polarization beam splitter, a square polarization beam splitter, and an “L” -shaped polarization beam splitter. The above-mentioned first to sixth problems are solved by constructing the optical path separating / combining unit by two-dimensionally combining with a container.

According to a fourth aspect, in the projection type stereoscopic image display system according to the second aspect, a flat dichroic mirror, a square dichroic mirror, and "L".
PS polarization separation / combination using any one of a color dichroic mirror, a plate-shaped polarization beam splitter, a rectangular polarization beam splitter, and an "L" -shaped polarization beam splitter. The above-mentioned first to sixth problems can be solved by constructing the optical path separating / combining unit by three-dimensionally combining with a container.

According to a fifth aspect of the present invention, in the projection type stereoscopic image display system according to the second, third and fourth aspects, the optical path separating / combining section captures white light obtained by the white light source section. After separating into R light, G light and B light,
P-polarized light and S-polarized light are separated into P-polarized RGB light and S-polarized RGB light, which are respectively provided in the right-eye RGB polarization modulation optical section and the left-eye RGB polarization modulation optical section. RGB images for the right eye and RGB images for the left eye, which are emitted from the RGB polarization modulation optical unit for the right eye and the RGB polarization modulation optical unit for the left eye and have different polarization directions while being incident.
By capturing the image and combining the RGB image for the right eye and the RGB image for the left eye and emitting the combined image, the first to sixth problems described above are solved.

Further, in claim 6, claims 1, 2, 3,
4. The projection-type stereoscopic image display system according to any one of 4 and 5, wherein the optical path separation / synthesis unit controls the right-eye polarization modulation optical unit or the right-eye RGB polarization modulation optical unit and the left-eye polarization modulation. While capturing the right-eye image or right-eye RGB image and the left-eye RGB image having different polarization directions respectively emitted from the optical unit or the left-eye RGB polarization modulation optical unit, Multiple 1
These images for the right eye or RG for the right eye by the / 4 wavelength device
The B image and the left-eye image or the left-eye RGB image are combined into circularly polarized light in different rotation directions and then combined, and the polarized glasses are provided with a ¼ wavelength plate or a ¼ wavelength film. The laminated polarizing glasses convert the right-eye RGB image and the left-eye RGB image of circularly polarized light having different rotation directions, which are reflected or transmitted by the screen, into two linearly polarized lights that are orthogonal to each other, and each observer observes them. 1 to 6 described above by guiding to the right and left eyes of
Solve the problem.

Further, in claim 7, claims 1, 2, 3,
In the projection type stereoscopic image display system according to any one of 4, 5, and 6, a reflection mechanism is arranged between the projection optical unit and the screen, and the reflection mechanism emits the light from the projection optical unit. Right eye image and left eye image,
Alternatively, by reflecting the RGB image for the right eye and the RGB image for the left eye to make an optical path longer than the distance between the projection optical unit and the screen, and increasing the enlargement ratio, the above-described first to first Solve problem 6.

Further, in claim 8, claim 1, 2, 3,
In the projection type stereoscopic image display system according to any one of 4, 5, 6, and 7, when a stereoscopic image is displayed by a switch group, the right eye image signal input to the right eye input terminal is displayed. Polarization modulation optics for the right eye, R for the right eye
In addition to supplying to the GB polarization modulation optical unit, the left eye image signal input to the left eye input terminal is supplied to the left eye polarization modulation optical unit and the left eye RGB polarization modulation optical unit, and When displaying a non-stereoscopic image, by selecting either the right eye image signal input to the right eye input terminal or the left eye image signal input to the left eye input terminal, the Polarization modulation optics for right eye, RGB for right eye
By supplying to the polarization modulation optical section, the left-eye polarization modulation optical section, and the left-eye RGB polarization modulation optical section, the above-mentioned first to sixth problems are solved.

Further, in claim 9, claim 1, 2, 3,
In the projection type stereoscopic image display system according to any one of 4, 5, 6, 7, and 8, a spatial light modulation element that constitutes the right-eye polarization modulation optical section or the right-eye RGB polarization modulation optical section, and The spatial light modulation element forming the left-eye polarization modulation optical section or the left-eye RGB polarization modulation optical section and the polarization beam splitter forming the optical path separating / combining section are brought into close contact with each other, whereby Solve problem 6.

Further, in claim 10, claims 1, 2 and
In the projection type stereoscopic image display system according to any one of 3, 4, 5, 6, 7, and 8, an image display for the right eye, which constitutes the polarization modulation optical section for the right eye or the RGB polarization modulation optical section for the right eye. And a polarization-modulating optical part for the right eye or an R for the right eye
A spatial light modulation element forming a GB polarization modulation optical section, a left eye image display forming the left eye polarization modulation optical section or a left eye RGB polarization modulation optical section, and the left eye polarization modulation optical section Alternatively, the spatial light modulation element forming the RGB polarization modulation optical section for the left eye and the polarization beam splitter forming the optical path separation / combination section are brought into close contact with each other, thereby solving the above-mentioned first to sixth problems.

Further, in claim 11, claims 1, 2 and
In the projection type stereoscopic image display system according to any one of 3, 4, 5, 6, 7, and 8, an image display for the right eye, which constitutes the polarization modulation optical section for the right eye or the RGB polarization modulation optical section for the right eye. And a polarization-modulating optical part for the right eye or an R for the right eye
An image display for the left eye, which is in close contact with the spatial light modulation element that constitutes the GB polarization modulation optical section, and which constitutes the left eye polarization modulation optical section or the left eye RGB polarization modulation optical section, and the left eye The first to sixth problems described above are solved by bringing the polarization modulation optical section or the spatial light modulation element forming the RGB polarization modulation optical section for the left eye into close contact with each other.

Further, in claim 12, claims 1, 2 and
In the projection type stereoscopic image display system according to any one of 3, 4, 5, 6, 7, 8, 9, 10, and 11, the right-eye polarization modulation optical section or the right-eye RGB polarization modulation optical section is configured. As the image display for the right eye, the left eye polarization modulation optical section for the left eye or the RGB polarization modulation optical section for the left eye, the left eye image display has a spectrum to which the photoconductive layer of the spatial light modulator is sensitive. The above-mentioned first to sixth problems are solved by using a cathode ray tube which emits light and is arranged apart from the spatial light modulator.

Further, in claim 13, claims 1, 2 and
The projection type stereoscopic image display system according to any one of 3, 4, 5, 6, 7, 8, 9, 10 and 11, wherein the image display device for the right eye, which constitutes the polarization modulation optical unit for the right eye, An image display for the left eye that constitutes the polarization modulation optical unit for the left eye, three image display units for the right eye that configure the RGB polarization modulation optical unit for the right eye, and the RGB polarization modulation optical unit for the left eye As the three image display devices for the left eye, a cathode ray tube which has a fiber plate on the image display surface and emits light having a spectrum sensitive to the photoconductive layer of the spatial light modulator is used, and has a refractive index close to that of the fiber plate. On the fiber plate through the refractive index matching liquid layer having a refractive index,
The first to sixth problems described above are solved by stacking the spatial light modulators.

Further, in claim 14, claims 1, 2 and
In the projection type stereoscopic image display system according to any one of 3, 4, 5, 6, 7, 8, 9, 10, and 11, the right-eye polarization modulation optical section or the right-eye RGB polarization modulation optical section is configured. By using a liquid crystal display as a left-eye image display that constitutes the right-eye image display, the left-eye polarization modulation optical section or the left-eye RGB polarization modulation optical section, Solve the sixth problem.

According to a fifteenth aspect, in the projection type stereoscopic image display system according to the fourteenth aspect, a light having a spectrum sensitive to the photoconductive layer of the spatial light modulator is provided on the back side of each liquid crystal display. The respective light sources for emitting light are arranged, and by the light emitted from these light sources, an image display for the right eye that constitutes the polarization modulation optical section for the right eye, and for the left eye that constitutes the polarization modulation optical section for the left eye Liquid crystal forming an image display, three right-eye image display units forming the right-eye RGB polarization modulation optical unit, and three left-eye image display units forming the left-eye RGB polarization modulation optical unit Back lighting the display device solves the above-described first to sixth problems.

In the sixteenth aspect, the fourteenth and fifteenth aspects are provided.
In the projection type stereoscopic image display system according to any one of, a right-eye image display constituting the right-eye polarization modulation optical unit, a left-eye image display constituting the left-eye polarization modulation optical unit, 3 which constitutes the RGB polarization modulation optical unit for the right eye
One right-eye image display, three left-eye image displays that form the left-eye RGB polarization modulation optical section, and a light source that emits light having a spectrum sensitive to the photoconductive layer of the spatial light modulator. Using a liquid crystal display having a fiber plate on the image display surface and being back-illuminated by light emitted from the light source to display an image, for refractive index matching having a refractive index close to that of the fiber plate By laminating the spatial light modulation element on the fiber plate via the liquid layer, the above-described first to sixth problems are solved.

In the seventeenth aspect, the fourteenth and the first aspects are provided.
5. In the projection type stereoscopic image display system according to any one of 5 and 16, as the liquid crystal display, a nematic liquid crystal,
Liquid crystal display using guest-host liquid crystal in which dichroic dye is added to one or more kinds of liquid crystal selected from the group consisting of cholesteric liquid crystal, smectic liquid crystal, and mixture of these liquid crystals, or nematic liquid crystal, cholesteric liquid crystal, smectic liquid crystal Ordinary refractive index of one or more liquid crystals selected from the group consisting of liquid crystals and mixtures of these liquid crystals,
The extraordinary refractive index or the refractive index when the liquid crystal is randomly aligned is equivalent to the above-mentioned 2 in the resin having the same refractive index.
A guest-host type liquid crystal / resin composite in which the liquid crystal added with a color dye is dispersed, or a liquid crystal display using a guest / host type liquid crystal / resin composite in which the resin is dispersed in the liquid crystal. And illuminating the liquid crystal display with a light having a spectrum that the photoconductive layer of the spatial light modulator is sensitive to and that the dichroic dye absorbs. By making the light incident on the photoconductive layer of the light modulation element, the above-mentioned first to sixth problems are solved.

In the eighteenth aspect, the fourteenth and first aspects are provided.
In the projection-type stereoscopic image display system according to any one of 5, 16, and 17, by using a light source formed in a flat plate shape as the light source that back-illuminates the liquid crystal display, the above-described first to sixth problems To solve.

According to a nineteenth aspect, in the projection type stereoscopic image display system according to the eighteenth aspect, a discharge lamp, a concave mirror disposed on the back surface of the discharge lamp, and a front surface of the discharge lamp are disposed. By configuring the light source formed in the flat plate shape by a diffusion plate that diffuses and transmits the light emitted from the discharge lamp and the light reflected by the concave mirror, the above-described first to sixth Solve a problem.

According to a twentieth aspect of the invention, in the projection type stereoscopic image display system according to the eighteenth aspect of the invention, there is provided a reflection plate formed in a flat plate shape, and a discharge lamp arranged on one front side of the reflection plate. A diffusion plate that is arranged on the front side of the discharge lamp so as to face the reflection plate and that diffuses and transmits the light emitted from the discharge lamp and the light reflected by the reflection plate directly. By configuring the flat plate-shaped light source, the above-described first to sixth problems are solved.

According to a twenty-first aspect, in the projection type stereoscopic image display system according to the eighteenth aspect, the flat light source is formed by an EL light emitting layer which is formed in a flat plate and emits light when an electric field is applied. By configuring
The first to sixth problems described above are solved.

Further, in claim 22, claims 1, 2 and
3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 1
3, 14, 15, 16, 17, 18, 19, 20, 21
In the projection type three-dimensional image display system according to any one of items 1 to 5, one or more types selected from the group consisting of a nematic liquid crystal, a cholesteric liquid crystal, a smectic liquid crystal, or a mixture of these liquid crystals, as a light modulation layer of the spatial light modulation element. By using the liquid crystal, the above-mentioned first to sixth problems are solved.

Further, in claim 23, claims 1, 2 and
3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 1
3, 14, 15, 16, 17, 18, 19, 20, 2
In the projection type stereoscopic image display system according to any one of 1 and 22, a substrate formed of glass or a fiber plate, a first transparent electrode laminated on the substrate, and a first transparent electrode laminated on the first transparent electrode. A photoconductive layer, a light absorption layer laminated on the photoconductive layer, a dielectric multi-layer film mirror laminated on the light absorption layer, and a dielectric multi-layer film mirror laminated on the dielectric multi-layer film mirror. Depending on the light intensity of the optical image input to the layer, when the incident light is P-polarized light, it is converted into light having an arbitrary polarization state from P-polarized light to S-polarized light, and is also incident. When the emitted light is S-polarized light, an optical modulation layer for converting the S-polarized light into light having any polarization state from S-polarized light to P-polarized light, and a second transparent electrode laminated on the optical modulation layer The spatial light modulator is constituted by And writes the input light image is incident on the photoconductive layer, the second light incident on the transparent electrode side P
When it is polarized light, it is converted into light having an arbitrary polarization state from P polarized light to S polarized light, and when the incident light is S polarized light, it is converted from S polarized light to P polarized light. The light having any polarization state is emitted from the second transparent electrode side to solve the above-described first to sixth problems.

Further, in claim 24, claims 1, 2 and
3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 1
3, 14, 15, 16, 17, 18, 19, 20, 2
The projection type stereoscopic image display system according to any one of 1, 22, and 23, wherein the right-eye polarization modulation optical section, the left-eye polarization modulation optical section, the right-eye RGB polarization modulation optical section, the left-eye. Of the RGB polarization modulation optical section for use in the optical element and the optical elements of the optical separating / synthesizing section, all surfaces of which are in contact with air, or a part of the surfaces are laminated with an antireflection film. This solves the above-mentioned first to sixth problems.

[0077]

Embodiments <Description of Configuration of Each Embodiment><Description of Configuration of an Embodiment Corresponding to Claims 1, 12, 22, and 24> FIG. 1 shows a basic monochrome type of a projection type stereoscopic image display system according to the present invention. It is a block diagram shown.

The projection type stereoscopic image display system 1 shown in this figure comprises a screen 2, polarizing glasses 3 and an image magnifying projection display 4, and the image magnifying projection display 4 causes polarized light beams orthogonal to each other on the screen 2. The image for the right eye and the image for the left eye that are oriented are displayed, and the viewer wearing the polarizing glasses 3 sees the monochrome stereoscopic image.

The screen 2 is orthogonal to the right-eye image (image in the S-polarized light state) in the right-eye / left-eye image projected by the image magnifying projection display 4 and the polarization direction of the right-eye image. The image for the left eye (the image in the P-polarized light state) having the polarization direction of
The polarized glasses 3 are guided to the right-eye lens 5 and the left-eye lens 6.

The polarizing glasses 3 are displayed on the screen 2 and a polarizing plate or polarizing film 5 for the right eye that transmits light having the same polarization direction as the polarization direction of the image for the right eye displayed on the screen 2. The left-eye polarizing plate or the polarizing film 6 that transmits light in the same polarization direction as the left-eye image is reflected by the screen 2 by the right-eye polarizing plate or the polarizing film 5. The image for the right eye is transmitted and guided to the right eye of the observer wearing the polarizing glasses 3, and the image for the left eye reflected by the screen 2 by the polarizing plate for the left eye or the polarizing film 6 is transmitted. The viewer's left eye is guided to show this viewer a monochrome stereoscopic image.

Further, the image magnifying projection display 4 comprises a light source section 7, an optical path separating / combining section 8, a projection optical section 9, a P polarization modulating optical section 10 and an S polarization modulating optical section 11. Visible light is generated by the light source unit 7, the visible light is separated into P-polarized light and S-polarized light by the optical path separation / combination unit 8, and the P-polarization modulation optical unit 10 and the S-polarization modulation optical unit 11 are generated. S polarization-modulated light emitted from the P-polarization modulation optical unit 10 (hereinafter, referred to as light of an image for the right eye) and P-polarization modulated light emitted from the S-polarization modulation optical unit 11 (Hereinafter, this is referred to as the light of the image for the left eye) is taken in, one image for the right eye and the image for the left eye are combined, and this is projected onto the screen 2 by the projection optical unit 9.

The light source section 7 includes a light source 12 for generating visible light,
An infrared light cut filter 13 that cuts infrared light included in the light emitted from the light source 12, and an ultraviolet light included in the light in which the infrared light is cut by the infrared light cut filter 13. UV cut filter 1 for cutting
4 and a lens 15 for converting visible light whose ultraviolet light is cut by the ultraviolet light cut filter 14 into parallel light, and generating visible light by the light source 12,
After the infrared light and the ultraviolet light included in the light are cut by the infrared light cut filter 13 and the ultraviolet light cut filter 14, they are converted into parallel light by a lens 15,
It is incident on the optical path separating / combining unit 8.

The input / output surfaces of the optical path separation / combination unit 8 are coated with antireflection films, and the P polarized light contained in the visible light (parallel light) emitted from the light source unit 7 is transmitted therethrough to generate P light.
The light of the right-eye image (parallel light in the S-polarized light state) emitted from the P-polarization modulation optical unit 10 is guided to the projection optical unit 9 while being guided to the polarization-modulation optical unit 10, and further the light source unit is provided. The S-polarized light included in the visible light (parallel light) emitted from 7 is guided to the S-polarization modulation optical unit 11, and the light of the image for the left eye emitted from the S-polarization modulation optical unit 11 ( A polarization beam splitter 16 is provided, which transmits parallel light in the P-polarized light state and guides it to the projection optical unit 9.
The visible light emitted from the light source unit 7 is separated into P-polarized light and S-polarized light, the P-polarized light is guided to the P-polarization modulation optical unit 10, and the S-polarized light is transmitted to the S-polarization modulation optical unit 11. The light of the image for the right eye emitted from the P-polarization modulation optical unit 10 and the light of the image for the left eye emitted from the S-polarization modulation optical unit 11 are combined in parallel with each other to form one right eye. An image for the left eye is generated and is made incident on the projection optical unit 9.

The projection optical unit 9 is a lens 1 for condensing the light of the images for the right and left eyes emitted from the optical path separating / combining unit 8.
7, the lens 17 enlarges and projects the light of the right-eye / left-eye image emitted from the optical path separating / combining unit 8 onto the screen 2.

The P-polarization modulation optical unit 10 also takes in the image signal I _R for the right eye and displays it on the screen.
1, an input / output surface is coated with an antireflection film, the spatial light modulator 23 disposed on the front side of the cathode ray tube 21 and the image for the right eye displayed on the cathode ray tube 21 are received, and The spatial light modulator 23 is provided with a lens 22 that forms an image on one surface side (rear surface side) thereof, and the cathode ray tube 21 captures the image signal I _R for the right eye and displays it on the screen. While the image for the right eye displayed on the screen is formed on one surface of the spatial light modulator 23, the P-polarized light emitted from the optical path separation / combination unit 8 is incident on the other surface of the spatial light modulator 23. The light emitted from the other surface side of the spatial light modulator 23 (from the P-polarized light state or the P-polarized light state to S
Light having an arbitrary polarization state up to the polarized light state) is made incident on the optical path separation / synthesis unit 8. The S-polarized light reflected by the optical path separating / combining unit 8 becomes the light of the image for the right eye. In addition, this P
The spatial light modulator 23 used in the polarization modulation optical unit 10 will be described in detail later.

Similarly to the P-polarization modulation optical section 10, the S-polarization modulation optical section 11 is arranged on the front side of the cathode ray tube 21 which takes in the image signal I _L for the left eye and displays it on the screen. A spatial light modulation element 23,
Upon receiving the image for the left eye displayed on the cathode ray tube 21,
The spatial light modulator 23 is provided with a lens 22 that forms an image on one surface side (rear surface side) of the spatial light modulator 23. The cathode ray tube 21 captures the image signal I _L for the left eye and displays it on the screen, and the lens 22 displays the image. While the image for the left eye displayed on the screen of the cathode ray tube 21 is formed on one surface side of the spatial light modulation element 23, S emitted from the optical path separation / synthesis unit 8 is emitted.
The polarized light is made incident on the other surface side of the spatial light modulation element 23, and the light emitted from the other surface side of the spatial light modulation element 23 (from the S polarized light state or the S polarized light state to the P polarized light state). Light with an arbitrary polarization state)
It is incident on the combining unit 8. The P-polarized light that has passed through the optical path separation / synthesis unit 8 becomes the light for the image for the left eye.

Next, referring to the block diagram shown in FIG.
The P polarization modulation optical section 10 and the S polarization modulation optical section 11 described above
The spatial light modulation element 23 used in 1. will be described in detail.

FIG. 2 is a block diagram showing an example of the spatial light modulation element 23 used in the P polarization modulation optical section 10 and the spatial light modulation element 23 used in the S polarization modulation optical section 11 described above.

The spatial light modulator 23 shown in this figure includes a first transparent substrate 25, a first transparent electrode 26, a photoconductive layer 27, and
A light absorption layer 28, a dielectric multilayer mirror 29, a light modulation layer 30, a second transparent electrode 31, a first antireflection film 32,
The second transparent substrate 33 and the second antireflection film 34 are sequentially formed by adhering and laminating, and an AC voltage is applied between the first transparent electrode 26 and the second transparent electrode 31 by an AC power source 35. While applying the writing light to the first transparent substrate 25 side while changing the resistance value of the photoconductive layer 27 and writing the two-dimensional optical information in the light modulation layer 30,
By making the read light incident on the second antireflection film 34 side, when the read light is P polarized light, the read light is modulated according to the optical information written in the light modulation layer 30, and P polarized light is obtained. When the read light is the S-polarized light, the light having an arbitrary polarization state from the wave light state or the P-polarized light state to the S-polarized light state is used. The light is modulated into an S-polarized light state or light having an arbitrary polarization state from the S-polarized light state to the P-polarized light state, and the light is emitted to the outside.

<Description of AC Power Supply 35> The AC power supply 35
Is an AC voltage having a voltage value equal to or higher than a preset predetermined voltage value, that is, an effective value of the AC voltage required to match the major axis of the liquid crystal molecules forming the light modulation layer 30 with the direction of the applied electric field. AC voltage value with a large effective value, eg 2
An alternating voltage having a voltage value of about 80 V is generated and applied to the first transparent electrode 26 and the second transparent electrode 31.

<Description of First Transparent Substrate 25> Further, the first transparent substrate 25 is composed of a flat glass substrate or the like which is a substrate of the spatial light modulator 23, and the first transparent substrate 25 is provided on one surface thereof. The electrode 26 is laminated.

<Description of First Transparent Electrode 26> The first transparent electrode 26 is added to one surface of the photoconductive layer 27 or one surface of the first transparent substrate 25 by adding 5% Sn to In ₂ O ₃ , for example. The ITO transparent electrode film having a thickness of 0.05 μm is formed, and a voltage is applied to the photoconductive layer 27 based on an AC voltage supplied from the AC power supply 35.

<Description of Photoconductive Layer 27> The photoconductive layer 27 is an amorphous film made of one or more elements selected from the group consisting of silicon, germanium and carbon, an amorphous silicon film, a hydrogenated amorphous silicon film, The amorphous silicon carbide film, hydrogenated amorphous silicon carbide film, and the like are made of a material whose impedance is significantly changed by light irradiation, and the light absorption layer 28 is laminated on one surface thereof.

Further, as the photoconductive layer 27, in addition to the above-mentioned materials, for example, an amorphous selenium film, an amorphous SeAs film, an amorphous ZnS film, an amorphous Cd.
An S film or an amorphous CdSe film can also be used. Further, as the photoconductive layer 27, a GaAs crystal, a GaP crystal, a Bi ₁₂ SiO ₂₀ crystal, or a Bi ₁₂ crystal is used.
Crystals such as GeO ₂₀ crystals whose impedance changes significantly by light irradiation are also suitable.

In addition, as the photoconductive layer 27, it is also possible to use a dispersion type photoconductive film in which particles of a photoconductive substance are dispersed in a resin. In this case, as the photoconductive material used for the dispersion type photoconductive film, a phthalocyanine pigment, an azo pigment, a polycyclic quinone pigment, a perylene pigment, a perinone pigment, an anthraquinone pigment, an indigo pigment, a thioindigo pigment, Dioxazine pigment, azo lake pigment, thiapyrylium pigment, quinacridone pigment, cyanine pigment, pyrrole pigment, porphyrin pigment, antanton pigment, squarylium pigment, azurenium pigment, ZnO, TiO, CdS, or CdSe is used. be able to.

<Description of Light Absorbing Layer 28> The light absorbing layer 28 is C
one or more films selected from the group consisting of a dTe film, a diamond-like carbon film, an amorphous film substantially composed of silicon, carbon and germanium,
Alternatively, it is composed of a resin composite or the like in which one or more materials selected from the group consisting of inorganic pigments, organic pigments, carbon, and dyes are dispersed in a resin, and particularly when absorbing writing light or reading light. , Its specific resistance changes little,
In addition, it is made of a material that absorbs read light particularly strongly, and the dielectric multilayer mirror 29 is laminated on one surface thereof.

<Description of Dielectric Multilayer Film Mirror 29> The dielectric multilayer film mirror 29 includes a SiO ₂ film, a TiO ₂ film, and a HfO ₂ film.
Film, Ta ₂ O ₅ film, ZnS film, Al ₂ O ₃ film, Na ₂ A
1F ₆ film, MgF ₂ film, LaF ₃ film, GdF ₃ film, Sm
It is composed of a multilayer film in which two or more films selected from the group consisting of an F ₃ film, a CeF ₃ film, a ZrO ₂ film and a CeO ₂ film are laminated, and the light modulation layer 3 is provided on one surface thereof.
0 is stacked.

<Description of Light Modulation Layer 30> The light modulation layer 30 is injected into an empty cell formed by a frame-shaped sealing member sandwiched between the dielectric multilayer mirror 29 and the second transparent electrode 31. Nematic liquid crystal, cholesteric liquid crystal, smectic liquid crystal, or one or more liquid crystals selected from the group consisting of a mixture of these liquid crystals. Writing light is incident from the first transparent substrate 25 side. When the light passes through the first transparent electrode 26 and enters the photoconductive layer 27, the impedance of the photoconductive layer 27 changes, and the electric field applied to the light modulation layer 30 changes, the refractive index of the liquid crystal 37 changes. Then, the read light is incident from the second antireflection film 34 side, and when this is transmitted through the second transparent substrate 33, the first antireflection film 32, and the second transparent electrode 31, and is incident, if this is P polarized light. , Liquid crystal 3
Depending on the refractive index of 7, the light is transmitted as P-polarized light as it is, or it is transmitted as light in any polarization state from P-polarized light to S-polarized light, and the read light is S-polarized light. If so, the liquid crystal 37 is directly transmitted as S-polarized light depending on the refractive index of the liquid crystal 37, or is transmitted in any polarization state from S-polarized light to P-polarized light, and then transmitted. It is reflected by the multilayer film mirror 29 and emitted as display light.

When injecting the liquid crystal 37, spacers such as ceramic particles for controlling the substrate gap, plastic particles, glass particles, spacers such as glass fibers, pigments, dyes, viscosity modifiers, and other properties of the present invention are used. You may add the additive which does not have a bad influence.

<Explanation of Second Transparent Substrate 33> Further, the second transparent substrate 33 is composed of a flat glass substrate which is a substrate of the spatial light modulator 23, and the first antireflection film is formed on one surface thereof. 32 is laminated, and the second antireflection film 34 is laminated on the other surface.

<Description of Second Antireflection Film 34> The second antireflection film 34 is formed of a SiO ₂ film, a TiO ₂ film, a HfO ₂ film, or Ta.
₂ O ₅ film, ZnS film, Na ₂ AlF ₆ film, MgF ₂ film,
It is composed of a multilayer film in which one or more films selected from the group consisting of a CeF ₃ film, a ZrO ₂ film and a CeO ₂ film are laminated.

<Explanation of the first antireflection film 32>
The antireflection film 32 is a SiO ₂ film, a TiO ₂ film, or HfO.
₂ film, Ta ₂ O ₅ film, ZnS film, Na ₂ AlF ₆ film, M
The second transparent electrode 31 is composed of a multilayer film in which one or more films selected from the group consisting of a gF ₂ film, a CeF ₃ film, a ZrO ₂ film, and a CeO ₂ film are laminated.
Are stacked.

<Description of Second Transparent Electrode 31> The second transparent electrode 31 is formed on the first antireflection film 32 by, for example, In ₂ O ₃
0.05 μm thick I formed by adding 5% Sn to
The light modulation layer 3 is composed of a TO transparent electrode film and is based on an AC voltage supplied from the AC power source 35.
An electric field is applied to 0.

Further, in the embodiment shown in FIG. 1, reflection is prevented from among the respective constituent elements of the P-polarization modulation optical section 10 and the S-polarization modulation optical section 11 and the respective optical path separation / combination sections 8. An antireflection film is provided on a necessary portion, if necessary.

As described above, in this embodiment, the visible light is generated by the light source section 7 of the image magnifying projection display 4,
The visible light is converted into P-polarized light by the optical path separating / combining unit 8.
The S-polarized light is separated into S-polarized light and made incident on the P-polarized modulation optical section 10 and the S-polarized modulation optical section 11, respectively. The right-eye image light) and the P-polarization modulated light emitted from the S-polarization modulation optical unit 11 (hereinafter, referred to as the left-eye image light) are taken in to obtain one right-eye / left-eye image. By synthesizing the images and projecting them on the screen 2 by the projection optical unit 9, a right-eye image and a left-eye image having mutually orthogonal polarization directions are displayed on the screen 2, An observer wearing the polarized glasses 3 can see a monochrome stereoscopic image.

<Description of Configuration of Embodiments Corresponding to Claims 2, 12, 22, and 24> Next, a basic color type of the projection type stereoscopic image display system according to the present invention will be described.

FIG. 3 is a block diagram showing a basic color type of the projection type stereoscopic image display system according to the present invention.

The projection type stereoscopic image display system 130 shown in this figure includes a screen 131, polarizing glasses 132, and an image magnifying projection display 133. The RGB image for the right eye and the RGB image for the left eye, which are oriented, are displayed to show the full-color or multi-color stereoscopic image to the viewer wearing the polarizing glasses 132.

The screen 131 is for the right and left eyes projected by the image magnifying projection display 133.
RGB image for right eye in GB image (S polarized light state image)
And the left-eye RGB image (image in the P-polarized light state) having a polarization direction orthogonal to the polarization direction of the right-eye RGB image while maintaining the polarization direction, and the polarizing glasses 132
To the right eye lens 134 and the left eye lens 135.

The polarizing glasses 132 are a right-eye polarizing plate or polarizing film 134 that transmits light having the same polarization direction as the polarization direction of the right-eye RGB image displayed on the screen 131, and are displayed on the screen 131. A left-eye polarizing plate or polarizing film 135 that transmits light in the same polarization direction as that of the left-eye RGB image that has been formed, and a right-eye polarizing plate or polarizing film 134.
RG for the right eye reflected by the screen 131 by
The B image is transmitted and guided to the right eye of the observer wearing the polarizing glasses 132, and the left eye RGB image reflected by the screen 131 by the left eye polarizing plate or the polarizing film 135 is transmitted to transmit the B image. Guide it to the observer's left eye and show the observer a full-color or multi-color stereoscopic image.

The image magnifying projection display 133 includes a light source section 136, an optical path separating / combining section 137, a projection optical section 138, a blue P polarization modulation optical section 139B, and a green P section.
Polarization modulation optical section 139G and red P polarization modulation optical section 13
9R, blue S polarization modulation optical section 140B, green S polarization modulation optical section 140G, red S polarization modulation optical section 140R
And a visible light is generated by the light source unit 136, the visible light is separated into two by the optical path separation / combination unit 137, and the red P polarization modulation optical unit 139R, the green P polarization modulation optical unit 139G, and Blue P polarization modulation optical unit 13
9B, a red S polarization modulation optical section 140R, a green S polarization modulation optical section 140G, and a blue S polarization modulation optical section 140B.
And the S polarization modulated light emitted from the red P polarization modulation optical section 139R, the green P polarization modulation optical section 139G and the blue P polarization modulation optical section 139B (hereinafter, referred to as an RGB image for the right eye). (Hereinafter referred to as light), red S-polarization modulation optical section 140R, green S-polarization modulation optical section 140G, and blue S-polarization modulation optical section 140B. (Referred to as “right eye”), and one RGB image for right eye / left eye is synthesized, and the RGB image for right eye / left eye is projected on the screen 131 by the projection optical unit 138.

The light source section 136 is a light source 14 for generating visible light.
1, an infrared light cut filter 142 that cuts infrared light included in the light emitted from the light source 141, and an infrared light cut filter 142 includes the infrared light. The ultraviolet light cut filter 143 that cuts the ultraviolet light present and the ultraviolet light cut filter 143.
And a lens 144 for collimating visible light whose ultraviolet light has been cut by the light source 141 into parallel light. Lens 1 after cutting off infrared light and ultraviolet light
The collimated light is converted into parallel light by the optical path separating / combining unit 13
It is incident on 7.

The input / output surfaces of the optical path separation / synthesis unit 137 are coated with antireflection films, and the P polarized light contained in the visible light (parallel light) emitted from the light source unit 136 is transmitted and emitted. Of the incident right eye RGB image light, the right eye RGB image light (parallel light) in the S-polarized light state is reflected, guided to the projection optical unit 138, and further emitted from the light source unit 136. The left-angle RGB image light (parallel light) in the P-polarized light state of the incident left-eye RGB image light while reflecting and emitting the S-polarized light included in visible light (parallel light). Projection optical unit 13
8 of the polarization beam splitter 145, and of the P polarized light emitted from the polarization beam splitter 145, reflects the blue light, and reflects this blue P polarization modulation optical unit 139.
The blue P polarization modulation optical unit 1
The B image for the right eye emitted from 39B is reflected and is incident on the polarization beam splitter 145, and the polarization beam splitter 14 is transmitted through the blue dichroic mirror 146B.
Of the P-polarized light from 5, the green light is reflected and the red light is transmitted, and these are converted into the green P-polarization modulation optical unit 139.
A right eye emitted from the red P polarization modulation optical unit 139R by reflecting the G image for the right eye emitted from the green P polarization modulation optical unit 139G while being incident on each of the G and red P polarization modulation optical unit 139R. The R image for
It is incident on the blue dichroic mirror 146B,
A green dichroic mirror 146G that enters the polarization beam splitter 145 is provided.

Further, the optical path separation / combination unit 137 reflects blue light of the S polarized light emitted from the polarization beam splitter 145 and makes it enter the blue S polarization modulation optical unit 140B. A blue dichroic mirror 147B that reflects the left-eye B image emitted from the blue S polarization modulation optical unit 140B and makes it enter the polarization beam splitter 145, and the polarization beam splitter that transmits the blue dichroic mirror 147B. Of the S-polarized light from 145, green light is reflected, red light is transmitted, these are made incident on the green S-polarization modulation optical section 140G and red S-polarization modulation optical section 140R, respectively, and these green S Polarization modulation optical unit 140
The G image for the left eye emitted from G is reflected, the R image for the left eye emitted from the red S polarization modulation optical section 140R is transmitted, and is made incident on the dichroic mirror for blue 147B. And a green dichroic mirror 147G which is incident on the light source 145.

Then, after separating the visible light emitted from the light source unit 136 into P-polarized light and S-polarized light, the P-polarized light is separated into blue light, green light and red light, Blue P
Polarization modulation optical section 139B and green P polarization modulation optical section 13
9G and the red P-polarization modulation optical section 139R, and separates the S-polarized light into blue light, green light, and red light to obtain a blue S-polarization modulation optical section 140B and a green S-polarization modulation optical section. Section 140G and red S polarization modulation optical section 140R
And the blue P polarization modulation optical unit 1 in parallel with the above.
The light of the B image for the right eye emitted from 39B, the light of the G image for the right eye emitted from green P polarization modulation optical section 139G, and the R image for the right eye emitted from red P polarization modulation optical section 139R. The light of the RGB image for the right eye is created by synthesizing the same with the light of the right eye, and the light of the B image for the left eye emitted from the blue S polarization modulation optical section 140B and the green S polarization modulation optical section 14 are generated.
After the light of the G image for the left eye emitted from 0G and the light of the R image for the left eye emitted from the red S polarization modulation optical unit 140R are combined to create the light of the RGB image for the left eye, The light of the right-eye RGB image and the light of the left-eye RGB image are combined to generate one right-eye / left-eye RGB image, and this is made incident on the projection optical unit 138.

The projection optical section 138 is provided with a lens 148 for condensing the light of the RGB images for the right and left eyes emitted from the optical path separating / combining section 137, and the optical path separating / combining section 137 is provided by the lens 148. The light of the RGB image for the right and left eyes emitted from the above is enlarged on the screen 131,
To project.

Further, the blue P polarization modulation optical section 139B takes in the B image signal I _RB for the right eye and displays it on the screen 152RB, and each input / output surface is coated with an antireflection film. Splitter 1
The blue spatial light modulator 154RB arranged on the front surface side of the cathode ray tube 152RB and the cathode ray tube 152RB are displayed so that the distance from the cathode ray tube 45 (the length of the optical path) becomes a preset constant distance A. The lens 153RB receives the B image for the right eye and forms an image on the one surface side (rear surface side) of the spatial light modulator for blue color 154RB.

Then, the B image signal I _RB for the right eye is taken in by the cathode ray tube 152RB and displayed on the screen, and the B image for the right eye displayed on the cathode ray tube 152RB by the lens 153RB is converted into the blue spatial light modulator 154RB. The blue P-polarized light emitted from the optical path separating / combining unit 137 is incident on the other surface side of the blue spatial light modulation element 154RB while forming an image on the one surface side of the blue spatial light modulation element 154RB. B image light for the right eye emitted from the other surface side (B having an S-polarized light state)
Light) and makes it enter the optical path separation / combination unit 137.

In this case, the blue spatial light modulator 15
4RB is the same as the spatial light modulator 23 shown in FIG.
Transparent substrate 25, first transparent electrode 26, photoconductive layer 27
A light absorption layer 28, a dielectric multilayer film mirror 29, a light modulation layer 30, a second transparent electrode 31, and a first antireflection film 32.
The second transparent substrate 33 and the second antireflection film 34 are provided, and the type and thickness of the liquid crystal 37 are adjusted so that the modulation characteristics are optimal in the wavelength range of blue light. The electro-optical characteristics such as the transmittance and the extinction ratio of the light modulation layer 30 having dependence are optimized.

Further, the green P polarization modulation optical section 139G takes in the G image signal I _RG for the right eye and displays it on the screen, and a cathode ray tube 152RG, each input / output surface is coated with an antireflection film, and the polarized beam Splitter 1
It is displayed on the green spatial light modulator 154RG and the cathode ray tube 152RG arranged on the front side of the cathode ray tube 152RG so that the distance from the cathode ray tube 45 (the length of the optical path) becomes a preset constant distance A. The lens 153RG receives the G image for the right eye and forms an image on the one surface side (rear surface side) of the green spatial light modulation element 154RG.

Then, the G image signal I _RG for the right eye is taken in by the cathode ray tube 152RG and displayed on the screen, and the G image for the right eye displayed on the cathode ray tube 152RG by the lens 153RG is used as the green spatial light modulator 154RG. While forming an image on one surface side, the green P-polarized light emitted from the optical path separation / combination unit 137 is made incident on the other surface side of the green spatial light modulation element 154RG, and the green spatial light modulation element 154RG is also formed. Light of the G image for the right eye emitted from the other surface side (G having an S-polarized light state
Light) and makes it enter the optical path separation / combination unit 137.

In this case, the spatial light modulator for green color 15
4RG is similar to the spatial light modulator 23 shown in FIG.
Transparent substrate 25, first transparent electrode 26, photoconductive layer 27
A light absorption layer 28, a dielectric multilayer film mirror 29, a light modulation layer 30, a second transparent electrode 31, and a first antireflection film 32.
The second transparent substrate 33 and the second antireflection film 34 are provided, and the type and thickness of the liquid crystal 37 are adjusted so as to obtain the optimum modulation characteristics in the wavelength range of green light. The electro-optical characteristics such as the transmittance and the extinction ratio of the light modulation layer 30 having dependence are optimized.

Further, the red P polarization modulation optical section 139R takes in the R image signal I _RR for the right eye and displays it on the screen, and a cathode ray tube 152RR, each input / output surface is coated with an antireflection film, and Splitter 1
The spatial light modulator 154RR for red arranged on the front side of the cathode ray tube 152RR and the cathode ray tube 152RR are displayed so that the distance from the cathode ray tube 45 (length of the optical path) becomes a preset constant distance A. The lens 153RR that receives the R image for the right eye and forms an image on the one surface side (rear surface side) of the red spatial light modulation element 154RR.

Then, the R image signal I _RR for the right eye is captured by the cathode ray tube 152RR and displayed on the screen, and the R image for the right eye displayed on the cathode ray tube 152RR by the lens 153RR is used as the red spatial light modulation element 154RR. While the image is formed on the one surface side, the red P-polarized light emitted from the optical path separation / combination unit 137 is made incident on the other surface side of the red spatial light modulation element 154RR, and the red spatial light modulation element 154RR is also formed. R image light for the right eye emitted from the other surface side (R having an S-polarized light state
Light) and makes it enter the optical path separation / combination unit 137.

In this case, the red spatial light modulator 15 is used.
4RR is similar to the spatial light modulator 23 shown in FIG.
Transparent substrate 25, first transparent electrode 26, photoconductive layer 27
A light absorption layer 28, a dielectric multilayer film mirror 29, a light modulation layer 30, a second transparent electrode 31, and a first antireflection film 32.
The second transparent substrate 33 and the second antireflection film 34 are provided, and the type and thickness of the liquid crystal 37 are adjusted so that the modulation characteristics are optimal in the wavelength range of red light, and the wavelength is adjusted. The electro-optical characteristics such as the transmittance and the extinction ratio of the light modulation layer 30 having dependence are optimized.

Further, the blue S polarization modulation optical section 140B takes in the B image signal I _LB for the left eye and displays it on the screen, and a cathode ray tube 152LB and each input / output surface are coated with an antireflection film, and the polarized beam Splitter 1
The blue spatial light modulator 154LB arranged on the front surface side of the cathode ray tube 152LB and the cathode ray tube 152LB are displayed so that the distance (length of the optical path) to the reference numeral 45 is a preset constant distance A. The lens 153LB that receives the B image for the left eye and forms an image on the one surface side (rear surface side) of the blue spatial light modulation element 154LB is provided.

Then, the B image signal I _LB for the left eye is taken in by the cathode ray tube 152LB and displayed on the screen, and the B image for the left eye displayed on the cathode ray tube 152LB by the lens 153LB is used as the blue spatial light modulator 154LB. The blue S-polarized light emitted from the optical path separation / combination unit 137 is incident on the other surface side of the blue spatial light modulation element 154LB while forming an image on the one surface side of the blue spatial light modulation element 154LB. The light of the B image for the left eye emitted from the other surface side (B having the P polarized light state)
Light) and makes it enter the optical path separation / combination unit 137.

In this case, the blue spatial light modulator 15
4LB is similar to the spatial light modulator 23 shown in FIG.
Transparent substrate 25, first transparent electrode 26, photoconductive layer 27
A light absorption layer 28, a dielectric multilayer film mirror 29, a light modulation layer 30, a second transparent electrode 31, and a first antireflection film 32.
The second transparent substrate 33 and the second antireflection film 34 are provided, and the type and thickness of the liquid crystal 37 are adjusted so as to obtain the optimum modulation characteristics in the wavelength range of blue light, and the wavelength dependence is obtained. The electro-optical characteristics such as the transmittance and the extinction ratio of the light modulating layer 30 having the property are optimized.

The green S-polarization modulation optical unit 140G takes in the left-eye G image signal I _LG and displays it on the screen, and a cathode-ray tube 152LG, each input / output surface of which is coated with an antireflection film. Splitter 1
It is displayed on the green spatial light modulator 154LG arranged on the front surface side of the cathode ray tube 152LG and the cathode ray tube 152LG so that the distance from the cathode ray tube 45 (the length of the optical path) becomes a preset constant distance A. The lens 153LG receives the G image for the left eye and forms an image on the one surface side (rear surface side) of the green spatial light modulation element 154LG.

Then, the G image signal I _LG for the left eye is taken in by the cathode ray tube 152LG and is displayed on the screen, and the G image for the left eye displayed on the cathode ray tube 152LG by the lens 153LG is displayed on the spatial light modulator 154LG for green. While forming an image on the one surface side, the green S-polarized light emitted from the optical path separation / combination unit 137 is made incident on the other surface side of the green spatial light modulation element 154LG, and the green spatial light modulation element 154LG is formed. The light of the G image for the left eye emitted from the other surface side (G having the P polarized light state
Light) and makes it enter the optical path separation / combination unit 137.

In this case, the spatial light modulator for green color 15
The 4LG has the same first structure as the spatial light modulator 23 shown in FIG.
Transparent substrate 25, first transparent electrode 26, photoconductive layer 27
A light absorption layer 28, a dielectric multilayer film mirror 29, a light modulation layer 30, a second transparent electrode 31, and a first antireflection film 32.
The second transparent substrate 33 and the second antireflection film 34 are provided, and the type and thickness of the liquid crystal 37 are adjusted so as to obtain the optimum modulation characteristics in the wavelength range of green light. The electro-optical characteristics such as the transmittance and the extinction ratio of the light modulation layer 30 having dependence are optimized.

Further, the red S polarization modulation optical section 140R takes in the R image signal I _LR for the left eye and displays it on the screen, and a cathode ray tube 152LR and each input / output surface are coated with an antireflection film. Splitter 1
It is displayed on the red spatial light modulator 154LR arranged on the front side of the cathode ray tube 152LR and the cathode ray tube 152LR so that the distance from the cathode ray tube 45 (the length of the optical path) becomes a preset constant distance A. The lens 153LR receives the R image for the left eye and forms an image on the one surface side (rear surface side) of the red spatial light modulation element 154LR.

Then, the R image signal I _LR for the left eye is taken in by the cathode ray tube 152LR and is displayed on the screen, and the R image for the left eye displayed on the cathode ray tube 152LR by the lens 153LR is used as the red spatial light modulator 154LR. While forming an image on the one surface side, the red S-polarized light emitted from the optical path separating / combining unit 137 is incident on the other surface side of the red spatial light modulating element 154LR, and the red spatial light modulating element 154LR is also formed. R image light for the left eye emitted from the other surface side (R having the P polarized light state
Light) and makes it enter the optical path separation / combination unit 137.

In this case, the red spatial light modulator 15 is used.
4LR is similar to the spatial light modulator 23 shown in FIG.
Transparent substrate 25, first transparent electrode 26, photoconductive layer 27
A light absorption layer 28, a dielectric multilayer film mirror 29, a light modulation layer 30, a second transparent electrode 31, and a first antireflection film 32.
The second transparent substrate 33 and the second antireflection film 34 are provided, and the type and thickness of the liquid crystal 37 are adjusted so that the modulation characteristics are optimal in the wavelength range of red light, and the wavelength is adjusted. The electro-optical characteristics such as the transmittance and the extinction ratio of the light modulation layer 30 having dependence are optimized.

Furthermore, in the embodiment shown in FIG. 3, the blue P polarization modulation optical section 139B to the red S polarization modulation optical section 14 are used.
Of the components of 0R and the components such as the optical path separating / combining unit 135, the portions where it is necessary to prevent reflection are provided with antireflection films as necessary.

As described above, in this embodiment, the light source section 136 of the image magnifying projection display 133 generates visible light, and the optical path separating / combining section 137 separates the visible light into P-polarized light and S-polarized light. After that, the P-polarized light and the S-polarized light are separated into red light, green light, and blue light, respectively, and the red P-polarization modulation optical section 139R, the green P-polarization modulation optical section 139G, and the blue P-polarization modulation are separated. Optics 139
B and the red S polarization modulation optical section 140R, the green S polarization modulation optical section 140G, and the blue S polarization modulation optical section 140B, respectively, and these red P polarization modulation optical section 139R, green P polarization modulation optical section 139G, and S-polarized modulation light (light of RGB image for right eye) emitted from blue P-polarization modulation optical section 139B, red S-polarization modulation optical section 14
Incorporating P-polarized modulated light (light of RGB image for the left eye) emitted from the 0R, green S-polarized light modulation optical unit 140G and blue S-polarized light modulation optical unit 140B into a single RGB image for the right and left eyes. Then, by projecting the right-eye / left-eye RGB image on the screen 131 by the projection optical unit 138, the right-eye RGB image and the left-eye RGB image are polarized on the screen 131 in mutually orthogonal polarization directions. The image can be displayed so that an observer wearing the polarized glasses 132 can see a full-color or multi-color stereoscopic image.

In this embodiment, the blue dichroic mirrors 146B and 147B are arranged closer to the polarization beam splitter 145, and the green dichroic mirrors 146G and 147G are arranged farther from the polarization beam splitter 145. Then, the blue P polarization modulation optical section 139B to the red S polarization modulation optical section 140R are arranged. The blue dichroic mirrors 146B and 147B may be arranged, and the arrangement of the blue P polarization modulation optical section 139B to the red S polarization modulation optical section 140R may be changed correspondingly.

Even in this case, the same effect as that of the embodiment shown in FIG. 3 can be obtained.

In this embodiment, blue dichroic mirrors 146B and 147B that reflect blue light and transmit green light and red light, and a green dichroic mirror 146B that reflects green light and transmit red light. Dichroic mirror 146
G and 147G are used, but characteristics other than these blue dichroic mirrors 146B and 147B and green dichroic mirrors 146G and 147G, for example, characteristics of reflecting red light and transmitting blue light and green light, Various dichroic mirrors having characteristics of reflecting green light and transmitting blue light are used. Correspondingly, blue P polarization modulation optical section 139B to red P polarization modulation optical section 139R, blue S polarization are used. The arrangement of the modulation optical unit 140B to the red S polarization modulation optical unit 140R may be changed.

Even in this case, the same effect as that of the embodiment shown in FIG. 3 can be obtained.

<Explanation of the Configuration of the Embodiments Corresponding to Claims 3, 5, 12, 22, and 24> Next, of the projection type stereoscopic image display system according to the present invention, the color type as shown in FIGS. Optical path separation / synthesis unit 137 used in basic form
An embodiment will be described in which the optical path separation / combination unit for separating PS polarized light after modifying the above is used for color separation. Note that in the schematic diagrams shown in FIGS. 25 to 29, the embodiment shown in the figure is shown by a frame shown by a solid line, and the embodiment not shown by a frame shown by a dotted line (the embodiment shown in FIG. (Embodiment), and solid lines connecting these frames indicate the deformation relationship of each embodiment.

FIG. 4 is a block diagram showing an embodiment of the projection type stereoscopic image display system according to the present invention, which uses an optical path separating / combining section (planar type) for separating PS polarized light after color separation. . In this embodiment, the optical path separation shown in FIG.
The arrangement of the blue P-polarization modulation optical section 139B to the red S-polarization modulation optical section 140R is changed while modifying the combining section 137, and in the description, the same parts as the respective parts of the embodiment shown in FIG. 3 are used. In this case, the same symbols are used.

The projection-type stereoscopic image display system 1 shown in FIG. 3 is the same as the projection-type stereoscopic image display system 1 shown in FIG.
The difference from 30 is that in the embodiment shown in FIG. 3, the optical path separation / combination unit 137 separates the white light emitted from the light source unit 136 into P polarized light and S polarized light, and then the P polarized light is emitted. Wave light is separated into blue light, green light, and red light, and blue P
Polarization modulation optical section 139B to red P polarization modulation optical section 139
The light of the B image for the right eye to the light of the R image for the right eye emitted from the blue P polarization modulation optical section 139B to the red P polarization modulation optical section 139R while being incident on each R are combined to form a projection optical section. 138, while separating the S-polarized light into blue light, green light, and red light and making them incident on the blue S-polarization modulation optical section 140B to red S-polarization modulation optical section 140R, respectively. The light of the B image for the left eye to the light of the R image for the left eye emitted from the section 140B to the red S polarization modulation optical section 140R are combined to form the projection optical section 13.
In this embodiment, instead of the optical path separation / combination unit 137, the optical path separation / composition unit 137 is used.
The combining unit 171 is used, and the optical path separating / combining unit 171 allows the light source unit 136 and the blue P polarization modulation optical unit 139B.
The red P polarization modulation optical section 139R, the blue S polarization modulation optical section 140B to the red S polarization modulation optical section 140R, and the projection optical section 138 are optically coupled.

In this case, the optical path separation / combination unit 171 reflects a blue light contained in the white light emitted from the light source unit 136 and a blue dichroic mirror 172B which transmits the other light. , The blue light reflected by this blue dichroic mirror 172B
Polarized light and S polarized light are separated and made incident on the blue P polarization modulation optical section 139B and the blue S polarization modulation optical section 140B, respectively, and the B image for the right eye emitted from these blue P polarization modulation optical section 139B. Light and the light of the left-eye B image emitted from the blue S-polarization modulation optical unit 140B are combined to emit the light of the right-eye / left-eye B image, and the blue polarization beam splitter 173B. The dichroic mirror 172B for green which reflects the green light contained in the light transmitted through the dichroic mirror 172B for transmitting the other light and the green light reflected by the dichroic mirror 172G for green The polarized light and the S-polarized light are separated and made incident on the green P-polarized light modulation optical section 139G and the green S-polarized light modulation optical section 140G, respectively, and these green P-polarized light are also polarized. The light of the G image for the right eye emitted from the adjusting optical unit 139G and the light of the G image for the left eye emitted from the blue S polarization modulation optical unit 140G are combined, and the light of the G image for the right and left eyes is combined. And a polarization beam splitter 173G for green.

Further, the optical path separation / synthesis unit 171 separates the red light transmitted through the green dichroic mirror 172G into P polarized light and S polarized light, and a red P polarized light modulation optical unit 139R and a red S polarized light are separated. These red P-polarized light modulation optical units 1 are made incident on the respective modulation optical units 140R.
The light of the R image for the right eye emitted from 39R and the light of the R image for the left eye emitted from the red S polarization modulation optical unit 140R are combined to emit the light of the R image for the right and left eyes. A polarizing beam splitter 173R for red and a right / left eye emitted from the polarizing beam splitter 173G for green while transmitting the light of the R image for right / left eyes emitted from the polarizing beam splitter 173R for red. Dichroic mirror 174G for reflecting the light of the G image for right and emitting the light of the RG image for the right and left eyes, and the light of the RG image for the right and left eyes emitted from the dichroic mirror for green 174G B for the right eye and the left eye emitted from the polarization beam splitter 173B for blue while
It is provided with a blue dichroic mirror 174B that reflects the light of the image to generate the light of the RGB image for the right and left eyes and makes it enter the projection optical unit 138.

Then, the dichroic mirror for blue 17
2B and green dichroic mirror 172G separates white light emitted from light source unit 136 into blue light, green light, and red light, and then a blue polarization beam splitter 173B, a green polarization beam splitter 173G, and a red light The polarization beam splitter 173R converts the blue light, the green light, and the red light into P-polarized light and S-polarized light, respectively.
Separated into polarized light, blue P polarized light, blue S polarized light, green P polarized light, green S polarized light, red P polarized light, red S polarized light are generated, These are a blue P polarization modulation optical section 139B, a blue S polarization modulation optical section 140B,
The green P polarization modulation optical section 139G and the green S polarization modulation optical section 140G, and the red P polarization modulation optical section 139R and the red S polarization modulation optical section 140R are made incident respectively.

In parallel with this operation, a blue image for the right eye emitted from the blue P polarization modulation optical section 139B by the blue polarization beam splitter 173B, the green polarization beam splitter 173G and the red polarization beam splitter 173R. , A left-eye B image emitted from the blue S-polarization modulation optical unit 140B is combined to create a right-eye / left-eye B image, and a right-eye image emitted from the green P-polarization modulation optical unit 139G is generated. G image and green S polarization modulation optical unit 1
The G image for the left eye emitted from 40G is combined to create the G images for the right eye and the left eye, and the R image for the right eye emitted from the red P polarization modulation optical unit 139R and the red S polarization. After combining with the R image for the left eye emitted from the modulation optical unit 140R to create the R image for the right eye and the left eye, the dichroic mirror for green 174G and the dichroic mirror for blue 174B are used for the right eye and the left. The B image for the eye, the G image for the right eye / the left eye, and the R image for the right eye / the left eye are combined to create an RGB image for the right eye / left eye, and this is generated by the projection optical unit 138. Incident on.

Further, in the embodiment shown in FIG. 4, the blue P polarization modulation optical section 139B to the red S polarization modulation optical section 14 are used.
Of the respective components of 0R and the respective components such as the optical path separating / combining unit 171, an antireflection film is provided on a portion where it is necessary to prevent reflection.

Even in this case, the same effect as that of the embodiment shown in FIG. 3 can be obtained.

Further, in this embodiment, the blue dichroic mirrors 172B and 174B are arranged closer to the light source unit 136 and the projection optical unit 138, and the green dichroic mirrors 172G and 174G are arranged farther. Corresponding to this, the blue polarization beam splitter 173B to the red polarization beam splitter 173R and the blue P polarization modulation optical section 139B to the red S polarization modulation optical section 140R are arranged, but the light source section 136 and the projection optical system are arranged. Part 138
Closer to the green dichroic mirror 172G,
174G is arranged, and the blue dichroic mirrors 172B and 174B are arranged at the far side. Corresponding to this, the blue polarization beam splitter 173B to the red polarization beam splitter 173R and the blue P polarization modulation optical unit 139B to
The arrangement of the red P polarization modulation optical section 139R and the blue S polarization modulation optical section 140B to the red S polarization modulation optical section 140R may be changed.

Even in this case, the same effect as that of the embodiment shown in FIG. 4 can be obtained.

In this embodiment, the blue dichroic mirrors 172B and 174B that reflect blue light and transmit green light and red light, and the green dichroic mirrors 172B and 174B that reflect green light and transmit red light. Dichroic mirror 172
G and 174G are used, but characteristics other than these blue dichroic mirrors 172B and 174B and green dichroic mirrors 172G and 174G, for example, characteristics that reflect red light and transmit blue light and green light, Various dichroic mirrors having characteristics of reflecting green light and transmitting blue light are used. Corresponding to this, a polarizing beam splitter for blue 173B to a polarizing beam splitter for red 173R, and blue P polarization modulation optics are used. The positions of the section 139B to red P polarization modulation optical section 139R and the blue S polarization modulation optical section 140B to red S polarization modulation optical section 140R may be changed.

Even in this case, the same effect as that of the embodiment shown in FIG. 4 can be obtained.

<Explanation of Configuration of Embodiment Corresponding to Claims 3, 4, 12, 22, and 24> Next, in the projection type stereoscopic image display system according to the present invention, a color type as shown in FIGS. Optical path separation / synthesis unit 137 used in basic form
An embodiment will be described in which the optical path separation / combination unit for separating PS polarized light after modifying the above is used for color separation.

FIG. 5 is a block diagram showing an embodiment of the projection type stereoscopic image display system according to the present invention, in which an optical path separation / synthesis unit (stereoscopic type) for separating PS polarized light after color separation is used. . In this embodiment, the optical path separation shown in FIG.
The arrangement of the blue P-polarization modulation optical section 139B to the red S-polarization modulation optical section 140R is changed while modifying the combining section 137, and in the description, the same parts as the respective parts of the embodiment shown in FIG. 3 are used. In this case, the same symbols are used.

The projection-type stereoscopic image display system 1 shown in FIG. 3 is used for the projection-type stereoscopic image display system 1 shown in FIG.
The difference from 30 is that in the embodiment shown in FIG. 3 described above, the light path separating / combining unit 137 causes the light source unit 136 and the blue P
Polarization modulation optical section 139B to red P polarization modulation optical section 139
R, the blue S polarization modulation optical section 140B to the red S polarization modulation optical section 140R, and the projection optical section 138 are two-dimensionally optically coupled, whereas in this embodiment, the optical path separation / combination section is used. Instead of 137, an optical path separating / combining unit 175 is used, and the light source separating unit / combining unit 175 is used.
6, the blue P-polarization modulation optical section 139B to the red P-polarization modulation optical section 139R, the blue S-polarization modulation optical section 140B to the red S-polarization modulation optical section 140R, and the projection optical section 138 so as to optically couple them three-dimensionally. That is what I did.

In this case, the optical path separating / combining unit 175 includes a separating / combining system 176B for blue and a separating / combining system 176 for green.
G and a red separation / combination system 176R are provided to separate white light emitted from the light source unit 136 into blue light, green light, and red light, and these blue light to red light. Are separated into P-polarized light and S-polarized light, and the blue P
Polarization modulation optical section 139B, blue S polarization modulation optical section 140
B, the green P polarization modulation optical section 139G, the green S polarization modulation optical section 140G, the red P polarization modulation optical section 139R, and the red S polarization modulation optical section 140R, respectively,
The B image for the right eye to the R image for the left eye emitted from these blue P polarization modulation optical section 139B to red S polarization modulation optical section 140R.
After combining the images to create B images for the right and left eyes, G images for the right and left eyes, and R images for the right and left eyes, these B images for the right and left eyes ~ The R image for the right eye and the R image for the left eye are combined to create the RGB image for the right eye and the left eye, and this is made incident on the projection optical unit 138.

As shown in FIG. 6, the blue separation / combining system 176B converts the blue light contained in the white light emitted from the light source unit 136 into the plus direction of the Y axis (for example, to the right).
And a blue dichroic mirror 177B that reflects the other light and a blue mirror 178B that reflects the blue light emitted from the blue dichroic mirror 177B in the negative direction of the Z axis (for example, downward).
And separates the blue light reflected by the blue mirror 178B into P-polarized light and S-polarized light and makes them incident on the blue P-polarization modulation optical section 139B and the blue S-polarization modulation optical section 140B, respectively. Blue P polarization modulation optical unit 1
The light of the B image for the right eye emitted from 39B and the light of the B image for the left eye emitted from the blue S polarization modulation optical section 140B are combined, and the light of the B image for the right and left eyes is combined with the Y axis. Of the blue polarization beam splitter 179B that emits in the plus direction (for example, to the right) and the blue polarization beam splitter 179.
A blue dichroic mirror 180B that reflects the light of the B image for the right eye and the left eye emitted from B in the plus direction (for example, the front direction) of the X axis.

Then, the blue dichroic mirror 17
The blue light included in the white light emitted from the light source unit 136 is separated by the 7B and the blue mirror 1
The blue light is separated into P-polarized light and S-polarized light by the 78B and the blue polarization beam splitter 179B, which are made incident on the blue P-polarization modulation optical section 139B and the blue S-polarization modulation optical section 140B, respectively. Blue P
The light of the B image for the right eye emitted from the polarization modulation optical unit 139B and the light of the B image for the left eye emitted from the blue S polarization modulation optical unit 140B are combined to obtain the B image for the right and left eyes. After being generated, the light is reflected by the blue dichroic mirror 180B and is incident on the green separation / combination system 176G.

As shown in FIG. 7, the green separating / combining system 176G converts the green light contained in the light transmitted through the blue dichroic mirror 177B of the blue separating / combining system 176B into the plus direction of the Y axis. A green dichroic mirror 177G that reflects light (for example, to the right) and transmits other light, and this green dichroic mirror 1
A green mirror 178G that reflects green light emitted from 77G in the negative direction of the Z axis (for example, downward).
And separates the green light reflected by the green mirror 178G into P-polarized light and S-polarized light and makes them incident on the green P-polarization modulation optical section 139G and the green S-polarization modulation optical section 140G, respectively. Green P polarization modulation optical unit 1
The light of the G image for the right eye emitted from 39G and the light of the G image for the left eye emitted from green S polarization modulation optical unit 140G are combined, and the light of the G image for the right and left eyes is combined with the Y axis. Of the polarization beam splitter 179G for green, which emits in the positive direction (for example, to the right), and this polarization beam splitter 179 for green.
The light of the G image for the right and left eyes emitted from G is reflected in the plus direction (for example, the forward direction) of the X axis, and is emitted from the blue dichroic mirror 180B of the blue separation / combination system 176B. And a green dichroic mirror 180G that transmits the right-eye / left-eye G image light and emits the light in the plus direction (for example, the front direction) of the X axis.

Then, the green dichroic mirror 17
7G separates the green light contained in the light transmitted through the blue dichroic mirror 177B of the blue separation / combination system 176B, and at the same time, the green mirror 1
The 78 G and the green polarization beam splitter 179 G separate the green light into P-polarized light and S-polarized light, which are made incident on the green P-polarized modulation optical section 139 G and the green S-polarized modulation optical section 140 G, respectively. Green P
The light of the G image for the right eye emitted from the polarization modulation optical unit 139G and the light of the G image for the left eye emitted from the green S polarization modulation optical unit 140G are combined to form the G image for the right and left eyes. After generating, this is the dichroic mirror for green 180G
The light of the G image for the right and left eyes which is reflected by the blue separation / combination system 176B and is emitted from the blue dichroic mirror 180B is incident on the red separation / combination system 176R.

As shown in FIG. 8, the red separation / combination system 176R converts the red light contained in the light transmitted through the green dichroic mirror 177G of the green separation / combination system 176G into the plus direction of the Y axis. A red dichroic mirror 177R that reflects light (for example, to the right) and transmits other light, and this red dichroic mirror 1
A red mirror 178R that reflects the red light emitted from the 77R in the negative direction of the Z axis (for example, downward).
And separates the red light reflected by the red mirror 178R into P-polarized light and S-polarized light, which are made incident on the red P-polarization modulation optical section 139R and the red S-polarization modulation optical section 140R, respectively. Red P polarization modulation optical unit 1
The light of the R image for the right eye emitted from 39R and the light of the R image for the left eye emitted from the red S polarization modulation optical unit 140R are combined, and the light of the R image for the right and left eyes is combined with the Y axis. Of the red polarization beam splitter 179R that emits in the plus direction (for example, to the right) of the red polarization beam splitter 179.
The light of the R image for the right and left eyes emitted from R is reflected in the plus direction (for example, the front direction) of the X axis, and is emitted from the dichroic mirror 180G for green of the separation / combination system for green 176G. The right-eye / left-eye GB image light is transmitted, and the plus direction of the X axis (for example, the forward direction)
And a dichroic mirror for red 180R that emits light to.

Then, the red dichroic mirror 17
The red light included in the light transmitted through the green dichroic mirror 177G of the green separation / combination system 176G is separated by the 7R, and the red mirror 1
78R and the polarization beam splitter 179R for red separates the red light into P-polarized light and S-polarized light, which are made incident on the red P-polarization modulation optical section 139R and the red S-polarization modulation optical section 140R, respectively. Red P
The light of the R image for the right eye emitted from the polarization modulation optical unit 139R and the light of the R image for the left eye emitted from the red light S polarization modulation optical unit 140R are combined to generate the R for the right and left eyes. After generating the image, use this for the red dichroic mirror 180.
The projection optical unit 13 together with the light of the right-eye / left-eye GB image reflected by the R and emitted from the green dichroic mirror 180G of the green separation / combination system 176G.
8.

Further, in the embodiment shown in FIG. 5, the blue P polarization modulation optical section 139B to the red S polarization modulation optical section 14 are used.
Of the respective components of 0R and the respective components such as the optical path separating / combining unit 175, an antireflection film is provided on a portion where it is necessary to prevent reflection.

Even in this case, the same effect as that of the embodiment shown in FIG. 3 can be obtained.

In this embodiment, the blue dichroic mirror 177B, the green dichroic mirror 177G, and the red dichroic mirror 177R are sequentially arranged from the side closer to the light source section 136 to the side farther from the light source section 136, and the projection optical section 138 is provided. From near to far
Red dichroic mirror 180R, green dichroic mirror 180G, blue dichroic mirror 1
80B are sequentially arranged, and correspondingly, a blue polarization beam splitter 179B to a red polarization beam splitter 1 are provided.
79R, the blue P polarization modulation optical section 139B to the red S polarization modulation optical section 140R are arranged.
7G, a blue dichroic mirror 177B are sequentially arranged, and a blue dichroic mirror 180B, a green dichroic mirror 180G, and a red dichroic mirror 180R are sequentially arranged from the near side to the far side of the projection optical unit 138. Corresponding to the above, the arrangement of the blue polarization beam splitter 179B to the red polarization beam splitter 179R and the blue P polarization modulation optical section 139B to the red S polarization modulation optical section 140R may be changed.

Even in this case, the same effect as that of the embodiment shown in FIG. 5 can be obtained.

Further, in this embodiment, the blue dichroic mirrors 177B and 180B that reflect blue light and transmit green light and red light, and the green dichroic mirrors 177B and 180B reflect other light. Green dichroic mirror 1
77G, 180G and a red dichroic mirror 177R that reflects red light and transmits other light.
180R is used, but various dichroic mirrors having characteristics other than these blue dichroic mirrors 177B, 180B, green dichroic mirrors 177G, 180G and red dichroic mirrors 177R, 180R are used. Correspondingly, the polarization beam splitter 179B for blue to the polarization beam splitter 179R for red, the blue P polarization modulation optical unit 139B to
The arrangement of the red P polarization modulation optical section 139R and the blue S polarization modulation optical section 140B to the red S polarization modulation optical section 140R may be changed.

Even in this case, the same effect as that of the embodiment shown in FIG. 5 can be obtained.

<Explanation of Configuration of Embodiment Corresponding to Claims 3, 4, 12, 22, and 24> Next, as shown in FIGS. 25 to 29, the projection type stereoscopic image display system according to the present invention will be described with reference to FIG. Using the configuration diagram in which the basic type of the color type shown is modified, an optical path separation / combining unit (planar type) for separating the PS polarized light after the basic type of the color type shown in FIG. 3 and the color separation shown in FIG. Example used, after color separation as shown in FIG.
The color separation / combination system used in the example using the optical path separation / combination unit (three-dimensional type) for separating the S-polarized light is “L”.
A letter-shaped embodiment will be described.

FIG. 9 is a block diagram showing an embodiment in which the color separation / combination system of the projection type stereoscopic image display system according to the present invention is formed in an "L" shape. In this embodiment, the optical path separation / synthesis unit 137 shown in FIG. 3 is modified, and the blue P polarization modulation optical unit 139B to the red S polarization modulation optical unit 140R are modified.
In the description, the same reference numerals are used when the same parts as those of the embodiment shown in FIG. 3 are used.

The projection-type stereoscopic image display system 1 shown in FIG. 3 is the same as the projection-type stereoscopic image display system 1 shown in FIG.
The difference from 30 is that in the embodiment shown in FIG. 3 described above, the polarization beam splitter 14 is provided by the blue dichroic mirror 146B and the green dichroic mirror 146G.
The P-polarized light emitted from 5 is separated into blue light, green light, and red light, which are then respectively incident on the blue P-polarization modulation optical section 139B, the green P-polarization modulation optical section 139G, and the red P-polarization modulation optical section 139R. , These blue P polarization modulation optical units 139
The light of the B image for the right eye to the light of the R image for the right eye emitted from B to red P polarization modulation optical unit 139R are combined to enter the light of the RGB image for the right eye into the polarization beam splitter 145. , Blue dichroic mirror 147
B, the S-polarized light emitted from the polarization beam splitter 145 by the green dichroic mirror 147G is separated into blue light, green light, and red light, and the blue S-polarization modulation optical section 140B, the green light S-polarization modulation optical section 140G, The red S polarization modulation optical section 140R is made to enter the blue S polarization modulation optical section 140B to the red S polarization modulation optical section 14B.
While the light of the left-eye B image to the light of the left-eye R image emitted from 0R is combined and the light of the left-eye RGB image is incident on the polarization beam splitter 145, in this embodiment, A P polarization dichroic prism 160 is provided in place of the blue dichroic mirror 146B and the green dichroic mirror 146G, and an S polarization dichroic prism 1 is provided instead of the blue dichroic mirror 147B and the green dichroic mirror 147G.
That is, 61 is provided.

In this case, the P polarization dichroic prism 160 has a blue reflection / transmission surface 162RB for separating and combining the incident light into blue, green and red, and a green for separating and combining the incident light into green and red. Reflective transmission surface 162
The polarization beam splitter 14 includes an RG and a dichroic prism having an L-shaped cross section.
P-polarized light emitted from the P polarized light 5 is separated into blue light, green light, and red light, and the blue P-polarized light is arranged so that the distance from the polarization beam splitter 145 (the length of the optical path) is a constant distance A. Modulation optical unit 139B, green P polarization modulation optical unit 1
The light of the B image for the right eye and the G image for the right eye which are made to enter the 39G and red P polarization modulation optical section 139R respectively and are emitted from these blue P polarization modulation optical section 139B to red P polarization modulation optical section 139R. The light and the light of the R image for the right eye are combined to generate the light of the RGB image for the right eye, which is made incident on the polarization beam splitter 145.

Further, the dichroic prism 1 for S polarization is used.
Reference numeral 61 has a blue reflection / transmission surface 163LB for separating and combining the incident light into blue light, green light, and red light, and a green reflection / transmission surface 163LG for separating and combining the incident light into green light and red light. It is composed of a dichroic prism having an L-shaped cross section, and separates the S-polarized light emitted from the polarization beam splitter 145 into blue light, green light, and red light, and a distance from the polarization beam splitter 145 ( (Length of optical path) is made incident on each of the blue S polarization modulation optical section 140B, the green S polarization modulation optical section 140G, and the red S polarization modulation optical section 140R arranged so that the constant distance A is obtained, and these blue S polarization modulation Optics 140
Light of RGB image for the left eye by combining the light of the B image for the left eye, the light of the G image for the left eye, and the light of the R image for the left eye emitted from B to red S polarization modulation optical section 140R. Is generated and is incident on the polarization beam splitter 145.

Further, in the embodiment shown in FIG. 9, the blue P polarization modulation optical section 139B to the red S polarization modulation optical section 14 are used.
Of the respective components of 0R and the respective components such as the optical path separation / combination unit corresponding to the optical path separation / combination unit 137, an antireflection film may be provided on a portion where it is necessary to prevent reflection. ing.

Also in this way, an embodiment using the above-mentioned basic type of color type shown in FIG. 3 or the color separation shown in FIG. 4 and then using the optical path separation / synthesis unit (planar type) for separating PS polarized light It is possible to obtain the same effect as that of the embodiment using the optical path separation / synthesis unit (stereoscopic type) for separating the PS polarized light after the color separation shown in FIG.

In this embodiment, the blue reflection / transmission surface 162R is closer to the polarization beam splitter 145.
B and 163LB, and the P-polarization dichroic prism 160 and the S-polarization dichroic prism 1 having the green reflection / transmission surfaces 162RG and 163LG on the far side.
61 is used, but the reflective / transmissive surface 162R for each green is provided closer to the polarization beam splitter 145.
A P polarization dichroic prism having G and 163LG and a blue reflection / transmission surface 162RB and 163LB on the far side and an S polarization dichroic prism are used. Modulation optics 1
The arrangement of the 39B to red S polarization modulation optical section 140R may be changed.

Even in this case, the same effect as that of the embodiment shown in FIG. 9 can be obtained.

Further, in this embodiment, the blue reflection / transmission surface 16 that reflects blue light and transmits green light and red light.
2RB, 163LB, a P polarization dichroic prism 160 having a green reflection / transmission surface 162RG, 163LG that reflects green light and transmits red light, and an S polarization dichroic prism 161 are used. The blue P polarization modulation optical section 139B to the red P polarization modulation optical section 139R and the blue S polarization modulation optical section 140B to the red S polarization modulation optical section 140R are arranged corresponding to the above. Prism 160 and S
Various dichroic prisms having characteristics other than the polarization dichroic prism 161 such as a characteristic that reflects red light and transmits blue light and green light, a characteristic that reflects green light and transmits blue light, etc. According to this, the arrangement of the blue P polarization modulation optical section 139B to red P polarization modulation optical section 139R and the blue S polarization modulation optical section 140B to red S polarization modulation optical section 140R may be changed. .

Even in this case, the same effect as that of the embodiment shown in FIG. 9 can be obtained.

<Description of Configuration of Other Embodiments Corresponding to Claims 3, 12, 22, and 24> Next, as shown in FIGS. 25 to 29 of the projection type stereoscopic image display system according to the present invention, FIG. Using the configuration diagram in which the basic type of the color type shown is modified, an optical path separation / combining unit (planar type) for separating the PS polarized light after the basic type of the color type shown in FIG. 3 and the color separation shown in FIG. Example used, color separation shown in FIG.
An example will be described in which the color separation / combination system used in an example using an optical path separation / combination unit (stereoscopic type) for separating S-polarized light has a rectangular shape.

FIG. 10 is a block diagram showing an embodiment of the projection type stereoscopic image display system according to the present invention in which the color separation / synthesis system is a square. In this embodiment, the optical path separation / combination unit 137 shown in FIG. 3 is modified, and the arrangement of the blue P polarization modulation optical unit 139B to the red S polarization modulation optical unit 140R is changed. When the same parts as those of the embodiment shown in FIG. 3 are used, the same reference numerals are used.

The projection type stereoscopic image display system shown in FIG. 10 is different from the projection type stereoscopic image display system 130 shown in FIG. 3 in the embodiment shown in FIG.
The polarization beam splitter 1 includes a blue dichroic mirror 146B and a green dichroic mirror 146G.
The P-polarized light emitted from 45 is separated into blue light, green light, and red light, and the blue P-polarization modulation optical section 139B, the green P-polarization modulation optical section 139G, and the red P-polarization modulation optical section 139R are separated.
Respectively into the blue P polarization modulation optical unit 13
9B to the light of the B image for the right eye to the light of the R image for the right eye emitted from the red P polarization modulation optical unit 139R to enter the light of the RGB image for the right eye into the polarization beam splitter 145, Blue dichroic mirror 147
B, the S-polarized light emitted from the polarization beam splitter 145 is separated into blue light, green light, and red light by the green dichroic mirror 147G, and the blue S-polarization modulation optical unit 140B, the green S-polarization modulation optical unit 140G, and the red light are separated. The S polarization modulation optical section 140R is made to enter each of these blue S
Polarization modulation optical section 140B to red S polarization modulation optical section 140
The light of the B image for the left eye to the light of the R image for the left eye emitted from R are combined into the polarization beam splitter 145 for the R for the left eye.
While the light of the GB image is made incident, in this embodiment,
A P-polarized rectangular parallelepiped dichroic prism 167 is provided in place of the blue dichroic mirror 146B and the green dichroic mirror 146G, and an S-polarized rectangular parallelepiped dichroic prism 168 is substituted for the blue dichroic mirror 147B and the green dichroic mirror 147G. Is to be provided.

In this case, the P-polarized rectangular parallelepiped dichroic prism 167 has a blue reflection / transmission surface 169RB for separating and synthesizing the incident light into blue light and light of other colors, and the incident light to green light and other light. It is constituted by a rectangular parallelepiped dichroic prism arranged so that the green reflection / transmission surface 169RG that is separated and combined with the color light is orthogonal to each other.
The P-polarized light emitted from the polarization beam splitter 145 is separated into blue light, green light, and red light, and the distance from the polarization beam splitter 145 (optical path length) is a constant distance A.
The blue P-polarization modulation optical unit 139 arranged so that
B, the green P polarization modulation optical section 139G, and the red P polarization modulation optical section 139R are made incident on the blue P
Polarization modulation optical section 139B to red P polarization modulation optical section 139
The light of the B image for the right eye emitted from R, the light of the G image for the right eye, and the light of the R image for the right eye are combined to generate the light of the RGB image for the right eye. Beam splitter 145
Incident on.

The S-polarized rectangular parallelepiped dichroic prism 168 includes a blue reflection / transmission surface 170LB for separating and synthesizing incident light into blue light and light of other colors, and incident light of green light and other colors. Of the S-polarized light emitted from the polarization beam splitter 145 is constituted by a rectangular parallelepiped dichroic prism arranged so as to be orthogonal to the green reflection / transmission surface 170LG for separation and synthesis. , A blue S polarization modulation optical section 140B, a green S polarization modulation optical section 140G, and a red color which are arranged so that the distance from the polarization beam splitter 145 (the length of the optical path) is a constant distance A. S polarization modulation optical unit 1
Light of the B image for the left eye and light of the G image for the left eye, which are respectively incident on the 40R and emitted from the blue S polarization modulation optical section 140B to the red S polarization modulation optical section 140R.
The light of the R image for the left eye is combined with the light of the RGB image for the left eye to generate the light, which is made incident on the polarization beam splitter 145.

Further, in the embodiment shown in FIG. 10, the blue P polarization modulation optical section 139B to the red S polarization modulation optical section 1 are arranged.
Among the constituent elements of 40R and the optical path separating / combining section corresponding to the optical path separating / combining section 137, an antireflection film may be provided, if necessary, at a portion where reflection needs to be prevented. ing.

Also in this way, an embodiment using the above-mentioned basic color type shown in FIG. 3 or the color separation shown in FIG. 4 and then using the optical path separating / combining section (planar type) for separating PS polarized light It is possible to obtain the same effect as that of the embodiment using the optical path separating / combining unit (stereoscopic type) for separating the PS polarized light after the color separation shown in FIG.

Further, in this embodiment, the P-polarized rectangular parallelepiped dichroic prism 167 having the blue reflection / transmission surfaces 169RB and 170LB disposed on the bd surface and the green reflection / transmission surfaces 169RG and 170LG disposed on the ac surface, and S Although the polarized rectangular parallelepiped dichroic prism 168 is used, the green reflection / transmission surface 139RG is provided on the bd surface.
170LG is arranged, and the blue reflective / transmissive surface 169 is formed on the ac surface.
The P-polarized rectangular parallelepiped dichroic prism in which RB and 170LB are arranged and the S-polarized rectangular parallelepiped dichroic prism are used, and correspondingly, the blue P-polarized light modulation optical unit 139B to the red S-polarized light modulation optical unit 140R are used. The arrangement may be changed.

Even in this case, the same effect as that of the embodiment shown in FIG. 10 can be obtained.

Further, in this embodiment, the reflection / transmission surface 16 for blue which reflects blue light and transmits green light and red light.
9RB and 170LB, and a P-polarization rectangular parallelepiped dichroic prism 167 having a green reflection / transmission surface 169RG and 170LG that reflects green light and transmits red light.
A rectangular parallelepiped dichroic prism 168 for S polarization is used, and correspondingly, a blue P polarization modulation optical section 139B to
The red P-polarization modulation optical section 139R and the blue S-polarization modulation optical section 140B to the red S-polarization modulation optical section 140R are arranged. Other dichroic prisms that have characteristics other than the above, such as characteristics that reflect red light and transmit blue light and green light, and characteristics that reflect green light and transmit blue light, are supported. Then, the blue P polarization modulation optical section 139B to the red P polarization modulation optical section 139R, the blue S polarization
Polarization modulation optical section 140B to red S polarization modulation optical section 140
The arrangement of R may be changed.

Even in this case, the same effect as that of the embodiment shown in FIG. 10 can be obtained.

<Description of Configuration of Other Embodiments Corresponding to Claims 3, 12, 22, and 24> Next, as shown in FIG. 25 to FIG. 29 of the projection type stereoscopic image display system according to the present invention, FIG. 1 and the basic color type shown in FIG. 3, and the color separation shown in FIG. Then, an embodiment using an optical path separation / combination unit (planar type) for separating PS polarized light, color separation shown in FIG.
An embodiment using an optical path separation / combination unit (stereoscopic type) for separating S-polarized light, an embodiment in which the color separation / composition system shown in FIG. 9 is formed into an “L” shape, and a color separation / composition system shown in FIG. Polarizing beam splitter 145 used in a square embodiment
A description will be given of an example in which "" is shaped like "L".

FIG. 11 is a constitutional view showing an embodiment in which the polarization beam splitter has an "L" shape in the projection type stereoscopic image display system according to the present invention. Note that this embodiment is a modification of the polarization beam splitter 145 shown in FIG. 9, and in the description, when the same parts as those of the embodiment shown in FIG. 9 are used, the same reference numerals are used.

The projection type stereoscopic image display system shown in FIG. 11 is different from the projection type stereoscopic image display system shown in FIG. 9 in that in the embodiment shown in FIG. 9 described above, a rectangular polarization beam splitter 145 is used. In contrast to this, in this embodiment, instead of such a polarization beam splitter 145, one end face is closely attached to the entrance / exit face of the P polarization dichroic prism 160 via the index matching liquid 165. At the same time, the other end surface of the liquid
The dichroic prism for S polarization 16
That is, the polarization beam splitter 166 having a cross section of “L” shape, which is in close contact with the entrance / exit surface of No. 1 is used.

Further, in the embodiment shown in FIG. 11, the blue P polarization modulation optical section 139B to the red S polarization modulation optical section 1 are used.
Among the constituent elements of 40R and the optical path separating / combining section corresponding to the optical path separating / combining section 137, an antireflection film may be provided, if necessary, at a portion where reflection needs to be prevented. ing.

By doing so, the monochrome basic form shown in FIG. 1 and the color basic form shown in FIG.
Example using an optical path separation / combination unit (planar type) for separating PS polarized light after color separation shown in FIG. 5, an optical path separation / combination unit for separating PS polarized light after color separation shown in FIG. The same effect as the embodiment using (three-dimensional type), the embodiment in which the color separation / composition system shown in FIG. 9 is formed into an “L” shape, and the embodiment in which the color separation / composition system shown in FIG. 10 is rectangular. It is possible to reduce the Fresnel reflection between the polarization beam splitter 166, the P polarization dichroic prism 160, and the S polarization dichroic prism 161.

<Explanation of Configuration of Embodiment Corresponding to Claims 6, 12, 22, and 24> Next, in the projection type stereoscopic image display system according to the present invention, as shown in FIGS. Optical path separation that separates PS polarized light after separation
Using the configuration diagram obtained by modifying the embodiment using the synthesizing unit (flat type), the monochrome type shown in FIG. 1 and the color type shown in FIG. 3 and the color separation shown in FIG. Example using optical path separation / combination unit (planar type) for separating polarized light, Example using optical path separation / combination unit (stereoscopic type) for separating PS polarized light after color separation shown in FIG. 11, an embodiment in which the color separation / composition system shown in FIG. 9 is formed in an “L” shape, an embodiment in which the color separation / composition system shown in FIG.
An example in which the linear polarization system used in the example in which the polarization beam splitter shown in (1) is formed in an "L" shape is changed to the circular polarization system will be described.

FIG. 12 is a block diagram showing an embodiment using the circular polarization method in the projection type stereoscopic image display system according to the present invention. In this embodiment, the optical path separation shown in FIG.
This is a modification of the combining unit 171.
When the same parts as those in the embodiment shown in FIG. 4 are used, the same reference numerals are used.

The difference between the projection type stereoscopic image display system shown in FIG. 12 and the projection type stereoscopic image display system shown in FIG. 4 is that in the embodiment shown in FIG. The white light emitted from the portion 136 is separated into P-polarized light and S-polarized light, and the blue P
Polarization modulation optical section 139B to red P polarization modulation optical section 139
The R and blue S polarization modulation optical sections 140B to red S polarization modulation optical section 140R optically modulate the P polarized light and the S polarized light, respectively, to obtain an RGB image for the right eye and a left eye. R
After the GB image is generated, the RGB images are combined to generate an RGB image for the right and left eyes, which is projected on the screen 131 to give full-color, multi-color, or monochrome to an observer wearing the polarizing glasses 132. While the stereoscopic image is shown, in this embodiment, the blue polarization beam splitter 173B and the green polarization beam splitter 173 are used.
G and R quarter-wave plates 201B, 201G, and 201R are provided on the exit surface side of the polarization beam splitter 173R for red, respectively, and the right-eye RGB image and the left-eye RGB image are circularly polarized in different rotation directions. After turning it into light, it is combined to generate RGB images for the right and left eyes, and this is displayed on the screen 1.
Projected on 31 and polarized glasses 181 having a quarter wavelength function
This means that the observer wearing the image can see a full-color, multi-color, or monochrome stereoscopic image.

In this case, the polarized glasses 181 transmit the circularly polarized light having the same rotation direction as the rotation direction of the right-eye RGB image displayed on the screen 131 to the right-eye quarter-wave plate (or , 1/4 wavelength film) 18
2 and a right-eye polarization plate or a polarization film 183 that transmits linearly polarized light having the same polarization direction as the polarization direction of the right-eye RGB image among the light transmitted through the right-eye quarter wavelength plate 182. A quarter-wave plate for the left eye (or, which transmits circularly polarized light having the same rotation direction as the rotation direction of the RGB image for the left eye displayed on the screen 131 (or
(1/4 wavelength film) 184, and left eye polarized light that transmits linearly polarized light having the same polarization direction as the polarization direction of the RGB image for the left eye, out of the light transmitted through the 1/4 wavelength plate 184 for the left eye. It has a plate or a polarizing film 185.

Then, the RGB image for the right eye reflected by the screen 131 is transmitted by the quarter-wave plate for the right eye 182 and the polarizing plate for the right eye or the polarizing film 183, and the observation is performed by wearing the polarizing glasses 181. The left-eye RGB image reflected by the screen 131 by the left-eye quarter-wave plate 184 and the left-eye polarizing plate or the polarizing film 185 while being guided to the right eye of the observer. And show the viewer a full-color, multi-color or monochrome stereoscopic image.

Further, in the embodiment shown in FIG. 12, the blue P polarization modulation optical section 139B to the red S polarization modulation optical section 1 are arranged.
Among the respective constituent elements of 40R and the respective optical path separating / combining sections corresponding to the optical path separating / combining section 171, an antireflection film may be provided, if necessary, at a portion where reflection needs to be prevented. ing.

With such a configuration, the above-mentioned monochrome type basic form shown in FIG. 1 and color type basic form shown in FIG. 3 and optical path separation for separating PS polarized light after color separation shown in FIG. Example using a combining unit (planar type), color separation shown in FIG. 5, and then optical path separation for separating PS polarized light Similar to the embodiment in which the synthesizing system has an "L" shape, the color separating / combining system shown in FIG. 10 has a square shape, and the polarization beam splitter shown in FIG. 11 has an "L" shape. The effect can be obtained.

<Explanation of Configuration of Embodiment Corresponding to Claims 7, 12, 22, and 24> Next, in the projection type stereoscopic image display system according to the present invention, as shown in FIGS. Using a block diagram that is a modification of the basic form of the mold,
An example in which a monochrome type shown in FIG. 1 or a color type shown in FIG. 3 and an optical path separation / synthesis unit (planar type) for separating PS polarized light after color separation shown in FIG. 4 are used. 5, an embodiment using an optical path separation / combination unit (stereoscopic type) for separating PS polarized light after color separation, an embodiment in which the color separation / composition system shown in FIG. Used in an example in which the color separation / synthesis system shown in FIG. 10 is a square, an example in which the polarization beam splitter shown in FIG. 11 is in an “L” shape, an example using a circular polarization method shown in FIG. An example in which the magnified projection method is modified will be described.

FIG. 13 is a block diagram showing an embodiment of the projection type stereoscopic image display system according to the present invention which uses a reflection type enlarged projection system. Note that this embodiment is a modification of the embodiment shown in FIG. 1, and in the description, when the same parts as those of the embodiment shown in FIG. 1 are used, the same reference numerals are used.

The projection type stereoscopic image display system shown in FIG. 13 is different from the projection type stereoscopic image display system 1 shown in FIG. 1 in that in the embodiment shown in FIG. In contrast to the right eye / left eye image directly projected on the screen 2, in this embodiment, the first and second mirrors 186 are provided on the front side of the projection optical unit 9 of the image magnifying projection display 4. , 187 is provided, and on the front side of the reflection mechanism 188, the transmissive screen 1 for transparently displaying the images for the right and left eyes emitted from the reflection mechanism 188.
That is, 89 is provided.

In this case, the reflection mechanism 188 reflects the first right mirror and the left eye image emitted from the projection optical unit 9 obliquely downward while maintaining the polarization direction, and the first mirror 186. The right-eye / left-eye image reflected by 186 is provided with a second mirror 187 that reflects the image forward while projecting it on the back surface of the screen 189 while maintaining the polarization direction. The right-eye / left-eye image is reflected twice while maintaining the polarization direction and projected on the back surface of the screen 189.

The screen 189 allows the observer wearing the polarizing glasses 3 to see a monochrome stereoscopic image while holding the polarization directions of the right-eye and left-eye images projected by the reflection mechanism 188 and transmitting them. .

Further, in the embodiment shown in FIG. 13, P
Of the respective constituent elements of the polarization modulation optical section 10 and the S polarization modulation optical section 11 and the respective constituent elements such as the optical path separation / synthesis section 8,
An antireflection film is provided on a portion where it is necessary to prevent reflection, if necessary.

With such a configuration, the above-mentioned monochrome type basic form shown in FIG. 1 and color type basic form shown in FIG. 3 and optical path separation for separating PS polarized light after color separation shown in FIG. Example using a combining unit (flat type), color separation shown in FIG. 5, and then optical path separation for separating PS polarized light. Example using a combining unit (stereoscopic type), color separation shown in FIG. FIG. 12 shows an example in which the combining system has an "L" shape, an example in which the color separation / combining system shown in FIG. 10 has a square shape, and the polarization beam splitter shown in FIG. 11 has an "L" shape. In the embodiment using the circular polarization method shown in FIG. 1, the reflection type screens 2 and 131 are used.
In the embodiment shown in FIG. 3, a transparent screen 189 can be used to show an observer a monochrome stereoscopic image.

<Explanation of Configuration of Embodiment Corresponding to Claims 8, 12, 22, and 24> Next, as shown in FIGS. 25 to 29, each embodiment of the projection type stereoscopic image display system according to the present invention, that is, FIG. An example using an optical path separation / synthesis unit (planar type) for separating the PS polarized light after the color separation shown in FIG. 4 and the monochrome basic form shown in FIG. 3 and the color basic form shown in FIG. An example in which an optical path separation / combination unit (stereoscopic type) for separating the PS polarized light after the color separation shown is used, an example in which the color separation / composition system shown in FIG. 9 is formed into an “L” shape, and FIG.
An example in which the color separation / combination system shown in Fig. 11 is a square, an example in which the polarization beam splitter shown in Fig. 11 is in an "L" shape, an example using the circular polarization system shown in Fig. 12, and Fig. 13 is shown. A signal switching device for switching between a non-stereoscopic image and a stereoscopic image used in an embodiment or the like using the enlarged projection method will be described.

FIG. 14 is a block diagram showing an example of a signal switching device used in the projection type stereoscopic image display system according to the present invention. In this embodiment, when the same parts as those of the embodiment shown in FIG. 1 are used, the same reference numerals are used.

The signal switching device 190 shown in FIG.
The input right-eye image signal I _R and left-eye image signal I _L are input to the P-polarization modulation optical unit 10 and the S-polarization modulation optical unit 11 shown in FIG. 1 according to the operation content of the operator. Each of them is supplied to display a stereoscopic image, or only the right-eye image signal I _R is selected and supplied to the P-polarization modulation optical section 10 and the S-polarization modulation optical section 11 to display a non-stereoscopic image. Or

In this case, the signal switching device 190 displays the right-eye image input signal I _R for inputting the right-eye input terminal 191, the left-eye image signal I _L for inputting the left-eye input terminal 192, and a non-stereoscopic image. The right-eye image signal I _R input to the right-eye input terminal 191 is passed when the stereoscopic image is displayed. A first switch 195 supplied to the image input terminal 193 for the right eye, and an open state when displaying a non-stereoscopic image, and a closed state when displaying a stereoscopic image, which is input to the input terminal 192 for the left eye. the image signal I _L for the left eye is passed, S and the second switch 196 supplies the left-eye image input terminal 194 of the polarization-modulating optical unit 11, the image signal I _R is for the right eye to the input terminal 197a input This image signal for the right eye when A video distributor 197 that divides I _R into two and outputs from the first and second output terminals 197b and 197c, and an open state when displaying a stereoscopic image, and a closed state when displaying a non-stereoscopic image. Then, the right-eye image signal I _R input to the right-eye input terminal 191 is passed to be input to the input terminal 197a of the video distributor 197, and a stereoscopic image is displayed. The first output terminal 197b of the video distributor 197 is opened when the non-stereoscopic image is displayed and closed when the non-stereoscopic image is displayed.
The fourth switch 199 which passes the image signal I _R for the right eye output from the device and which is supplied to the image input terminal 193 for the right eye of the P-polarization modulation optical unit 10 and the open state when displaying a stereoscopic image. When displaying a non-stereo image, the right eye image signal I _R output from the second output terminal 197c of the video distributor 197 is closed and passed through the S
The fifth switch 200 is provided to the image input terminal 194 for the left eye of the polarization modulation optical unit 11.

When displaying a stereoscopic image, the third, fourth and fifth switches 198, 199 and 200 are opened and the first and second switches 195 and 196 are opened.
Is closed, and the image signal I _R for the right eye and the image signal I _L for the left eye input to the input terminal 191 for the right eye and the input terminal 192 for the left eye are input to the right of the P polarization modulation optical unit 10. The image input terminal 193 for the eye and the image input terminal 194 for the left eye of the S polarization modulation optical unit 11 are supplied to display a stereoscopic image.

When displaying a non-stereo image, the first and second switches 195 and 196 are opened and the third, fourth and fifth switches 198, 199 and 200 are used.
Is closed and the right-eye image signal I _R input to the right-eye input terminal 191 is input to the input terminal 1 of the video distributor 197.
The image signal I _R for the right eye output from the first output terminal 197b of the video distributor 197 while being supplied to 97a.
It is supplied to the image input terminal 193 for the right eye of the polarization modulation optical unit 10, and further the second output terminal 197 of the image distributor 197.
The image signal I _R for the right eye output from c is supplied to the image input terminal 194 for the left eye of the S polarization modulation optical unit 11 to display a non-stereo image.

With such a configuration, the monochrome basic form shown in FIG. 1 and the color basic form shown in FIG.
An example using an optical path separation / combination unit (planar type) for separating the PS polarized light after the color separation shown in FIG. 4, and an optical path separation for separating the PS polarized light after the color separation shown in FIG. An example using a synthesizing unit (three-dimensional type), an example in which the color separation / synthesis system shown in FIG. 9 is formed into an “L” shape, and a color separation / shown in FIG.
An embodiment in which the synthesizing system is in a square shape, an embodiment in which the polarization beam splitter shown in FIG. 11 is in an “L” shape, an embodiment using a circular polarization method shown in FIG. 12, and an enlarged projection method shown in FIG. In the embodiment described above, the stereoscopic image and the non-stereoscopic image can be selectively displayed.

<Explanation of Modifications of the Above-mentioned Embodiments> Next, referring to the schematic diagrams shown in FIGS. 30 and 31,
An embodiment using the monochrome type basic type shown in FIG. 1 and the color type basic type shown in FIG. 9, an embodiment using an optical path separation / synthesis unit (stereoscopic type) for separating PS polarized light after color separation shown in FIG.
An example in which the color separation / synthesis system shown in FIG.
An example in which the color separation / combination system shown in FIG. 0 is a square, an example in which the polarization beam splitter shown in FIG.
Modifications such as the embodiment using the circular polarization method shown in FIG. 12 and the embodiment using the enlarged projection method shown in FIG. 13 will be described.

<Explanation of Configuration of Modification Example Corresponding to Claim 3>
First, each embodiment of the projection type stereoscopic image display system according to the present invention, that is, the monochrome type shown in FIG. 1, the color type shown in FIG. 3, and the color separation shown in FIG.
Example using an optical path separation / synthesis unit (planar type) for separating S-polarized light, color separation shown in FIG. 5, and then implementation using an optical path separation / synthesis unit (solid type) for separating PS polarized light For example, an example in which the color separation / composition system shown in FIG. 9 is formed into an “L” shape, and an example in which the color separation / composition system shown in FIG.
In the embodiment using the circular polarization method shown in FIG. 12, the embodiment using the magnifying projection method shown in FIG. 13, etc., the rectangular polarization beam splitters 16, 145, 1 using prisms are used.
73B to 173R and 179B to 179R are used to configure the optical path separating / combining unit 8, but such polarization beam splitters 16, 145, 173B to 173R, 17 are used.
Instead of 9B to 179R, a flat polarization beam splitter 40 as shown in FIG. 15 may be used as shown in FIG.

In this case, the polarization beam splitter 40
Is a flat transparent substrate 41 made of a transparent material.
And a dielectric multilayer mirror 42 that is laminated on one surface side of the transparent substrate 41 and that reflects S-polarized light and transmits P-polarized light.
And an antireflection dielectric multilayer film 43 which is laminated on the other surface side of the transparent substrate 41 to prevent incident light and emitted light from being reflected, and the light emitted from the light source unit 7 is provided. Is separated into P-polarized light and S-polarized light, the P-polarized light is guided to the P-polarization modulation optical section 10, the S-polarized light is guided to the S-polarization modulation optical section 11, and the P-polarization modulation is performed in parallel therewith. The light of the image for the right eye emitted from the optical unit 10 and the light of the image for the right eye emitted from the S-polarization modulation optical unit 11 are combined to generate one image for the right and left eyes, and this is generated. The light is incident on the projection optical unit 9.

Even in this case, the monochrome type basic form shown in FIG. 1 and the color type basic form shown in FIG.
Example using an optical path separation / combination unit (planar type) for separating PS polarized light after color separation shown in FIG. 5, an optical path separation / combination unit for separating PS polarized light after color separation shown in FIG. Examples using (three-dimensional type), examples in which the color separation / combination system shown in FIG. 9 is formed into an “L” shape, examples in which the color separation / combination system shown in FIG. 10 is square, and FIG. 12 are shown. It is possible to obtain the same effects as those of the embodiment using the circular polarization method and the embodiment using the magnifying projection method shown in FIG.

<Structure Description of Modification of Claim 9>
Next, each embodiment of the projection type three-dimensional image display system according to the present invention, that is, the optical path separation for separating the PS polarized light after the monochrome type shown in FIG. 1 and the color separation shown in FIG.
Example using a combining unit (flat type), color separation shown in FIG. 5, and then optical path separation for separating PS polarized light. Example using a combining unit (stereoscopic type), color separation shown in FIG. FIG. 12 shows an example in which the combining system has an "L" shape, an example in which the color separation / combining system shown in FIG. 10 has a square shape, and the polarization beam splitter shown in FIG. 11 has an "L" shape. In each of the embodiments using the circular polarization method shown in FIG. 13 and the embodiment using the magnifying projection method shown in FIG. 13, for example, in the embodiment shown in FIG. 1, the P polarization modulation optical unit 10 and the S polarization modulation optical unit are used. A space is provided between the spatial light modulation element 23 forming the optical path 11 and the polarization beam splitter 16 forming the optical path separation / combination unit 8. However, as shown in FIG. 16, the spatial light modulation shown in FIG. The spatial light modulator 51 in which the second antireflection film 34 is removed from the element 23 Form, the polarization beam splitter 1
The spatial light modulator 51 and the polarization beam splitter 16 may be laminated with a refractive index matching liquid 49 having a refractive index equal to (or approximately equal to) 6 being interposed. .

By doing so, FIG.
Optical path separation / combination unit (planar type) that separates PS polarized light after the monochrome basic type shown in Fig. 4 and color separation shown in Fig. 4
, An example using an optical path separating / combining unit (stereoscopic type) for separating PS polarized light from the color separation shown in FIG. 5, and the color separation / combining system shown in FIG. An example in which the color-splitting / combining system shown in FIG. 10 is a square, an example in which the polarization beam splitter shown in FIG. 11 is an “L” -shape, and a circular polarization method shown in FIG. From the used embodiment, the embodiment using the magnified projection method shown in FIG.
It is possible to eliminate the gap between the P polarization modulation optical section 10, the S polarization modulation optical section 11, the S polarization modulation optical section 11, and the optical path separation / combination section 8.

<Description of Configuration of Other Modifications Corresponding to Claims 10, 11, 13, and 23> Next, each embodiment of the projection type stereoscopic image display system according to the present invention, that is, the monochrome basic type shown in FIG. And an embodiment using an optical path separation / combination unit (planar type) for separating the PS polarized light after the color separation shown in FIG. 4 and an optical path separation for separating the PS polarized light after the color separation shown in FIG. -Examples using a synthesizing unit (three-dimensional type), examples in which the color separation / synthesis system shown in Fig. 9 is "L" shaped, examples in which the color separation / synthesis system shown in Fig. 10 is square, and drawing 11
13 is an example in which the polarization beam splitter shown in FIG. 12 is formed into an “L” shape, an example using the circular polarization method shown in FIG.
Examples such as the example using the enlarged projection method shown in,
For example, in the embodiment shown in FIG. 1, the spatial light modulator 2 that constitutes the P polarization modulation optical section 10 and the S polarization modulation optical section 11
3, a cathode ray tube 21 and a polarization beam splitter 16 constituting the optical path separating / combining section 8 are provided with a gap, but as shown in FIG. 17, they are on the image display surface of the cathode ray tube 21 shown in FIG. Instead of the face plate,
A cathode ray tube 55 provided with a fiber plate is created, a fiber plate is used in place of the first transparent substrate 25 of the spatial light modulator 23 shown in FIG. 2, and the spatial light modulator 23 to the second antireflection film 34 are used. After the spatial light modulation element 61 is removed, the refractive index matching liquid 57 having a refractive index equal to (or approximately equal to) that of the fiber plate is interposed, and the cathode ray tubes 55 and the cathode ray tubes 55 and Each of the spatial light modulators 61 is laminated and each of the spatial light modulators is provided with a refractive index matching liquid 49 having a refractive index equal to (or substantially equal to) the refractive index of the polarization beam splitter 16 interposed. The element 61 and the polarization beam splitter 16 may be laminated.

By doing so, FIG.
Optical path separation / combination unit (planar type) that separates PS polarized light after the monochrome basic type shown in Fig. 4 and color separation shown in Fig. 4
, An example using an optical path separating / combining unit (stereoscopic type) for separating PS polarized light from the color separation shown in FIG. 5, and the color separation / combining system shown in FIG. An example in which the color-splitting / combining system shown in FIG. 10 is a square, an example in which the polarization beam splitter shown in FIG. 11 is an “L” -shape, and a circular polarization method shown in FIG. From the used embodiment, the embodiment using the magnified projection method shown in FIG.
It is possible to eliminate the gap between the P polarization modulation optical section 10, the S polarization modulation optical section 11, the S polarization modulation optical section 11, and the optical path separation / combination section 8.

<Structure Description of Other Modifications Corresponding to Claims 14 and 15> Next, the respective embodiments of the projection type stereoscopic image display system according to the present invention, that is, the monochrome basic type shown in FIG. 1 and FIG. An example using an optical path separation / combination unit (planar type) for separating the PS polarized light after performing the color separation shown in FIG. 4 and the color separation shown in FIG.
Example using an optical path separating / combining unit (stereoscopic type) for separating PS polarized light, an example in which the color separating / combining system shown in FIG. 9 is formed into an “L” shape, and a color separating / combining system shown in FIG. 11 is a rectangular beam splitter, and the polarization beam splitter shown in FIG.
Each of the embodiments, such as the character-shaped embodiment, the embodiment using the circular polarization method shown in FIG. 12, and the embodiment using the magnifying projection method shown in FIG. 13, for example, the P polarization in the embodiment shown in FIG. As a display device for the image for the right eye of the modulation optical unit 10 and a display device for the image for the left eye of the S polarization modulation optical unit 11, a cathode ray tube 21 is used.
I am trying to use the CRT 2
Instead of 1, the P polarization modulation optical unit 10 as shown in FIG.
The liquid crystal display device 68 may be used as the display device for the image for the right eye or the display device for the image for the left eye of the S polarization modulation optical unit 11.

In this case, the liquid crystal display device 68 cuts off the infrared light contained in the light emitted from the white light 69 and the light emitted from the white light 69 and transmits the other light. The infrared light cut filter 70, and the ultraviolet light cut filter 71 that cuts the ultraviolet light contained in the visible light whose infrared light is cut by the infrared light cut filter 70 and transmits the other light. And the light in the specific wavelength range included in the visible light whose ultraviolet light is cut by the ultraviolet light cut filter 71 (the spatial light modulator 23
A bandpass filter 72 that transmits only light in a wavelength range that can change the conductivity of the photoconductive layer 27 that configures There is. Also, white light 69
Instead of, a lamp having a spectrum sensitive to the photoconductive layer forming the spatial light modulator may be used.

Further, the liquid crystal display device 68 has a polarizing plate (or polarizing film) 74 for adjusting the polarization plane of the light condensed by the lens 73, and a straight line transmitted through the polarizing plate (or polarizing film) 74. A simple matrix type (or active matrix type) liquid crystal panel 7 that modulates light while being back-illuminated by polarized light
5 and a polarizing plate (or polarizing film) 76 for adjusting the polarization plane of the light modulated by the liquid crystal panel 75 and selecting the image for the right eye (or the image for the left eye).

The white light 69, the infrared light cut filter 70, the ultraviolet light cut filter 71, the band pass filter 72, the lens 73 and the polarizing plate (or the polarizing film) 74 constitute the spatial light modulator 23. By generating linearly polarized light in a wavelength range capable of changing the conductivity of the photoconductive layer 27 and illuminating the simple matrix type (or active matrix type) liquid crystal panel 75 from the back, the liquid crystal panel 75 emits light. The right eye image (or left eye image) by modulating only the specific polarization component of the light modulated by the liquid crystal panel 75 by the polarizing plate (or polarizing film) 76. Then, the light is made incident on the lens 22 and is made incident on one surface side of the spatial light modulator 23. Further, instead of the white lamp 69, a lamp having a spectrum sensitive to the photoconductive layer which is a component of the spatial light modulator may be used.

By doing so, FIG.
An example in which an optical path separation / combination unit (planar type) for separating PS polarized light after separating the colors shown in FIG. 4 and the basic type of monochrome type shown in FIG. Optical path separation that separates the PS polarized light after the color separation shown
An example using a synthesizing unit (three-dimensional type), an example in which the color separation / synthesis system shown in FIG. 9 is formed in an “L” shape, an example in which the color separation / synthesis system shown in FIG. 10 is square, and FIG. The same effects as those of the embodiment in which the polarization beam splitter shown in FIG. 7 is formed into an "L" shape, the embodiment using the circular polarization method shown in FIG. 12, the embodiment using the magnifying projection method shown in FIG. The configuration can be diversified.

<Description of Configuration of Other Modifications Corresponding to Claims 14, 15, 16 and 23> Next, each embodiment of the projection type stereoscopic image display system according to the present invention, that is, the monochrome basic type shown in FIG. 4 and the basic color type shown in FIG.
An example using an optical path separation / combination unit (planar type) for separating the PS polarized light after the color separation shown in FIG. 5, an optical path separation / combination unit for separating the PS polarized light after the color separation shown in FIG. Examples using (three-dimensional type), examples in which the color separation / combination system shown in FIG. 9 is formed in an “L” shape, examples in which the color separation / combination system shown in FIG. 10 is formed in a square, and FIG. 11 are shown. Each embodiment such as an embodiment in which the polarization beam splitter has an “L” shape, an embodiment using the circular polarization method shown in FIG. 12, and an embodiment using the magnifying projection method shown in FIG. 13, for example, FIG. In the embodiment shown, the P polarization modulation optical section 10 and the S polarization modulation optical section 1
Although the cathode ray tube 21, the lens 22 and the spatial light modulation element 23 are used as the constituent elements of No. 1, a liquid crystal display panel 79 with a spatial light modulation element shown in FIG. 19 is used, and this is shown in FIG. The P-polarization modulation optical unit 10 and the S-polarization modulation optical unit 11 which are back-illuminated by the light source configured by the white light 69, the infrared light cut filter 70, the ultraviolet light cut filter 71, the bandpass filter 72, and the lens 73. You may use it.

In this case, the liquid crystal display panel main body 77 constituting the liquid crystal display panel 79 with the spatial light modulator is provided with the transparent substrate 80 constituting the liquid crystal display panel main body 77 and the active substrate laminated on the transparent substrate 80. An electrode film 81 having a matrix structure, a liquid crystal display layer 82 arranged on the electrode film 81 and displaying an image for the right eye and an image for the left eye, and laminated on the liquid crystal display layer 82. Of the common electrode film 83 and a fiber plate 84 laminated on the common electrode film 83, and has a refractive index equal to (or almost equal to) the refractive index of the fiber plate 84. Spatial light modulation forming a liquid crystal display panel 79 with a spatial light modulator on a fiber plate 84 with a refractive index matching liquid 57 interposed. Child unit 78 is laminated.

The spatial light modulating element section 78 includes a spatial light modulating element 86 using a fiber plate instead of the first transparent substrate 25 of the spatial light modulating element 23 shown in FIG. It has a structure in which the refractive index matching liquid 57 having the same (or almost the same) refractive index, the polarizing film 87, and the refractive index matching liquid 57 are laminated in close contact with each other. The liquid crystal display panel 79 with the spatial light modulator including the liquid crystal display panel main body 77 and the spatial light modulator element 78 has a polarizing film for only a specific polarization component in the light modulated by the liquid crystal display panel main body 77. The image for the right eye and the image for the left eye are transmitted by 87 and the spatial light modulator 86
It has a function of making it incident on one surface side.

By doing so, FIG.
An example in which an optical path separation / combination unit (planar type) for separating PS polarized light after separating the colors shown in FIG. 4 and the basic type of monochrome type shown in FIG. Optical path separation that separates the PS polarized light after the color separation shown
An example using a synthesizing unit (three-dimensional type), an example in which the color separation / synthesis system shown in FIG. 9 is formed into an “L” shape, an example in which the color separation / synthesis system shown in FIG. 10 is square, and FIG. From the embodiment in which the polarization beam splitter shown in FIG. 7 is formed in an “L” shape, the embodiment using the circular polarization method shown in FIG. 12, the embodiment using the magnifying projection method shown in FIG. 10, the lens 22 between the cathode ray tube 21 and the spatial light modulation element 23 constituting the optical system 10 and the lens 22 between the cathode ray tube 21 and the spatial light modulation element 23 constituting the S polarization modulation optical unit 11 are deleted to remove the P polarization. The depths of the modulation optical section 10 and the S polarization modulation optical section 11 are further shortened, and the P polarization modulation optical section 10 and the S polarization modulation optical section 11 are reduced.
The space occupied by can be reduced.

<Description of Configuration of Other Modifications Corresponding to Claims 14, 15, 16 and 17> Next, each embodiment of the projection type stereoscopic image display system according to the present invention, that is, the monochrome basic type shown in FIG. 4 and the basic color type shown in FIG.
An example using an optical path separation / combination unit (planar type) for separating the PS polarized light after the color separation shown in FIG. 5, an optical path separation / combination unit for separating the PS polarized light after the color separation shown in FIG. Examples using (three-dimensional type), examples in which the color separation / composition system shown in FIG. 9 is formed in an “L” shape, examples in which the color separation / composition system shown in FIG. FIG. 19 shows a modified example such as an example in which the polarization beam splitter has an “L” shape, an example using the circular polarization method shown in FIG. 12, and an example using the magnifying projection method shown in FIG. As described above, the white light 69, the infrared light cut filter 70, the ultraviolet light cut filter 71, the band pass filter 72, and the lens 73.
A liquid crystal display panel 79 with a spatial light modulation element, in which a liquid crystal display panel body 77 which is back-illuminated by a light source configured by and a spatial light modulation element section 78 are integrated, is used. The liquid crystal used in the liquid crystal display layer 82 of the liquid crystal display panel 79 is not particularly specified, but as the liquid crystal used in the liquid crystal display layer 82, nematic liquid crystal, cholesteric liquid crystal, smectic liquid crystal, and these Guest-host liquid crystal in which a dichroic dye is added to one or more kinds of liquid crystal selected from the group consisting of a mixture of nematic liquid crystal to smectic liquid crystal,
Or ordinary refractive index, extraordinary refractive index of one or more kinds of liquid crystals selected from the group consisting of nematic liquid crystals, cholesteric liquid crystals, smectic liquid crystals and mixtures of these nematic liquid crystals to smectic liquid crystals, or when the liquid crystals are randomly aligned. A guest / host liquid crystal / resin composite in which a dichroic dye is added to and dispersed in a liquid crystal having a refractive index equal to any of the refractive indices, or a guest in which the liquid crystal and the dichroic dye are mixed. A guest / host liquid crystal / resin composite in which the resin is dispersed in a host liquid crystal is used, and a polarizing film 87 of the spatial light modulator 78 is used.
May be deleted.

By doing so, the spectrum absorbed by the dichroic dye from the light which is back-illuminated by the liquid crystal display panel main body 77 which constitutes the liquid crystal display panel 79 with the spatial light modulator. The light having a wavelength range (right-eye image or left-eye image) sensitive to the photoconductive layer 27 constituting the liquid crystal display panel 79 with the spatial light modulation element is generated, and is generated in the spatial light modulation element section 78. Writing can be performed, whereby the polarizing film 87 disposed between the liquid crystal display panel body 77 and the spatial light modulation element section 78 is deleted, and the P polarization modulation optical section 10 and the S polarization modulation optical section 11 are deleted. By further reducing the depth, the P polarization modulation optical section 10 and the S polarization modulation optical section 11
The space occupied by can be reduced.

<Description of Configuration of Other Modifications Corresponding to Claims 14, 15, 16, 17, and 23> Next, each embodiment of the projection type stereoscopic image display system according to the present invention, that is, the monochrome type shown in FIG. 3 and the color type basic form shown in FIG. 3 and the color separation shown in FIG. 4, and then an example using an optical path separation / combining unit (planar type) for separating PS polarized light, and the color separation shown in FIG. Then, the optical path separation for separating the PS polarized light
An example using a synthesizing unit (three-dimensional type), an example in which the color separation / synthesis system shown in FIG. 9 is formed into an “L” shape, an example in which the color separation / synthesis system shown in FIG. 10 is square, and FIG. Each of the embodiments, such as the embodiment in which the polarization beam splitter shown in FIG. 11 is formed into an “L” shape, the embodiment using the circular polarization method shown in FIG. 12, the embodiment using the magnifying projection method shown in FIG. In the embodiment shown in FIG. 1, as the components of the P polarization modulation optical section 10 and the S polarization modulation optical section 11, the cathode ray tube 21 and the lens 2 are provided.
2 and the spatial light modulation element 23 are used, the light source section 94, the lens 73, and the spatial light are used as the components of the P polarization modulation optical section 10 and the S polarization modulation optical section 11 as shown in FIG. The liquid crystal display panel 103 with a modulator may be used.

In this case, the light source section 94 cuts off the white light 69 which emits white light and the infrared light contained in the white light emitted from the white light 69 and transmits the other light. An infrared light cut filter 70, and an ultraviolet light cut filter 71 that cuts the ultraviolet light contained in the white light obtained by cutting the infrared light by the infrared light cut filter 70 and transmits the other light. , Light in a specific wavelength range included in the white light in which the ultraviolet light is cut by the ultraviolet light cut filter 71 (a wavelength that can change the conductivity of the photoconductive layer 27 that constitutes the spatial light modulator 23). Bandpass filter 72 that transmits only the light in the range)
And white light 69 (white light (visible light))
And a wavelength at which the infrared light cut filter 70, the ultraviolet light cut filter 71, and the bandpass filter 72 can change the conductivity of the photoconductive layer 27 constituting the spatial light modulator 23 from the white light. The light in the range is extracted, and the liquid crystal panel 103 with the spatial light modulator is back-illuminated through the lens 73. Here, instead of the white lamp 69, a lamp having a spectrum sensitive to the photoconductive layer which is a component of the spatial light modulator may be used.

Liquid crystal display panel 10 with spatial light modulator
3 is a liquid crystal display panel main body 77 having a fiber plate 84 shown in FIG. 19, a spatial light modulation element 86 using a fiber plate in place of the first transparent substrate 25 of the spatial light modulation element 23 shown in FIG. Has a refractive index equal to (or nearly equal to) that of the fiber plate,
The liquid crystal display panel body 77 and the spatial light modulator 10
4 and a spatial light modulation element section 78 including a polarizing film 87 and a refractive index matching liquid 57, and is formed from the light source section 94 via the lens 73. The liquid crystal display panel body 77 displays a right-eye image (or a left-eye image) while being back-illuminated by the supplied light of a specific wavelength range, and writes and reads the right-eye image in the spatial light modulation element section 78. When the light enters, the light of the image for the right eye (or the image for the left eye) is read out and emitted.

In this case, the spatial light modulator 10
An antireflection film is coated on the air-contacting surface of 4 and the air-contacting surface of the polarization beam splitter 16.
It prevents unwanted reflections from occurring.

By doing so, FIG.
An example in which an optical path separation / combination unit (planar type) for separating PS polarized light after separating the colors shown in FIG. 4 and the basic type of monochrome type shown in FIG. Optical path separation that separates the PS polarized light after the color separation shown
An example using a synthesizing unit (three-dimensional type), an example in which the color separation / synthesis system shown in FIG. 9 is formed into an “L” shape, an example in which the color separation / synthesis system shown in FIG. 10 is square, and FIG. The P-polarized light modulation optical unit 10 such as the embodiment in which the polarization beam splitter shown in FIG. 7 is formed in an “L” shape, the embodiment using the circular polarization method shown in FIG. 12, and the embodiment using the magnifying projection method shown in FIG. And the configuration of the S polarization modulation optical section 11 is simplified, and the depths of the P polarization modulation optical section 10 and the S polarization modulation optical section 11 are further shortened.
The space occupied by the polarization modulation optical section 11 can be reduced.

<Description of Configuration of Another Modification Corresponding to Claims 14, 15, 16, 18, and 19> Next, each embodiment of the projection type stereoscopic image display system according to the present invention, that is, the monochrome type shown in FIG. Of the color type shown in FIG. 4, the color type shown in FIG. 4, and the color separation shown in FIG. Then, the optical path separation for separating the PS polarized light
An example using a synthesizing unit (three-dimensional type), an example in which the color separation / synthesis system shown in FIG. 9 is formed into an “L” shape, an example in which the color separation / synthesis system shown in FIG. 10 is square, and FIG. Each of the embodiments, such as the embodiment in which the polarization beam splitter shown in FIG. 11 is formed into an “L” shape, the embodiment using the circular polarization method shown in FIG. 12, the embodiment using the magnifying projection method shown in FIG. In the embodiment shown in FIG. 1, as the components of the P polarization modulation optical section 10 and the S polarization modulation optical section 11, the cathode ray tube 21 and the lens 2 are provided.
2 and the spatial light modulator 23 are used, the flat plate light source 10 formed in a flat plate shape as shown in FIG.
7, the liquid crystal panel 103 with the spatial light modulator may be laminated on the flat light source 107.

In this case, the flat light source 107 has a flat light source body 108 formed in a flat plate shape, and the flat light source body 1
The infrared light cut filter 70 that cuts infrared light contained in the light emitted from 08 and transmits other light.
And the ultraviolet light included in the visible light, which is laminated on the infrared light cut filter 70, the infrared light being cut by the infrared light cut filter 70, is cut, and the other light is transmitted. An ultraviolet light cut filter 71, and light in a specific wavelength range included in the visible light that has been laminated on the ultraviolet light cut filter 71 and has been cut by the ultraviolet light cut filter 71 (the spatial light modulator 23 And a bandpass filter 72 that transmits only light in a wavelength range capable of changing the conductivity of the photoconductive layer 27 constituting the white light (visible light) by the flat light source body 108. Light that configures the spatial light modulator 23 from the white light by the infrared light cut filter 70, the ultraviolet light cut filter 71, and the bandpass filter 72. Extracts light of a wavelength range which can vary the conductivity of the conductive layer 27, backlighting the liquid crystal panel 103 with the spatial light modulator.

As shown in FIG. 22, the flat-plate light source body 108 includes a rod-shaped discharge lamp 109 for generating white light, a concave mirror 110 for collecting white light (visible light) obtained by the discharge lamp 109, and this concave mirror. The white light collected in 110 and a diffuser plate 111 for diffusing the white light directly incident from the discharge lamp 109 are provided, white light is generated by the discharge lamp 109, and the white light is collected by the concave mirror 110, After being diffused by the diffusion plate 111 and made uniform, the light is incident on the back surface side of the infrared light cut filter 70. In addition, the light emitted from the flat light source body 108 is not limited to visible light, and may have a spectrum sensitive to the photoconductive layer forming the spatial light modulator.

By doing so, FIG.
An example in which an optical path separation / combination unit (planar type) for separating PS polarized light after separating the colors shown in FIG. 4 and the basic type of monochrome type shown in FIG. Optical path separation that separates the PS polarized light after the color separation shown
An example using a synthesizing unit (three-dimensional type), an example in which the color separation / synthesis system shown in FIG. 9 is formed into an “L” shape, an example in which the color separation / synthesis system shown in FIG. 10 is square, and FIG. The P-polarized light modulation optical unit 10 such as the embodiment in which the polarization beam splitter shown in FIG. 7 is formed in an “L” shape, the embodiment using the circular polarization method shown in FIG. 12, and the embodiment using the magnifying projection method shown in FIG. And the configuration of the S polarization modulation optical section 11 is simplified, and the depths of the P polarization modulation optical section 10 and the S polarization modulation optical section 11 are further shortened.
The space occupied by the polarization modulation optical section 11 can be reduced.

When the flat plate light source unit 108 is used, substantially the same effect can be obtained even if the infrared light cut filter 70 and the ultraviolet light cut filter 71 described above are deleted.

<Description of Configuration of Other Modifications Corresponding to Claims 14, 15, 16, 18, and 20> Next, each embodiment of the projection type stereoscopic image display system according to the present invention, that is, the monochrome type shown in FIG. 3 and the color type basic form shown in FIG. 3 and the color separation shown in FIG. 4, and then an example using an optical path separation / combining unit (planar type) for separating PS polarized light, and the color separation shown in FIG. Then, the optical path separation for separating the PS polarized light
An example using a synthesizing unit (three-dimensional type), an example in which the color separation / synthesis system shown in FIG. 9 is formed into an “L” shape, an example in which the color separation / synthesis system shown in FIG. 10 is square, and FIG. 22 is a modified example of the embodiment in which the polarization beam splitter shown in FIG. 13 is formed in an “L” shape, the embodiment using the circular polarization method shown in FIG. 12, and the embodiment using the magnifying projection method shown in FIG. The flat light source main body 108 shown in FIG.
The flat light source main body 112 shown in FIG. 3 may be used.

In this case, the flat light source main body 112 has a reflection plate 113 formed in a flat plate shape, a rod-shaped discharge lamp 114 arranged at one end of the reflection plate 113, and emitting white light.
The concave mirror 115 that collects the white light obtained by the discharge lamp 114 and emits the white light to the reflector 113 side, and the diffusion coefficient increases as the distance from the discharge lamp 114 increases, and is collected in the concave mirror 115. Diffusing plate 1 for diffusing the emitted white light, the white light directly incident from the discharge lamp 114, and the white light reflected by the reflector 113.
16, the white light is generated by the discharge lamp 114, collected by the concave mirror 115, diffused by the diffuser plate 116 while being reflected by the reflective plate 113, and then uniformized by the infrared light. The light is incident on the back surface side of the cut filter 70. The light emitted from the discharge lamp 114 is not limited to white light, and may have a spectrum sensitive to the photoconductive layer forming the spatial light modulator.

By doing so, FIG.
An example in which an optical path separation / combination unit (planar type) for separating PS polarized light after separating the colors shown in FIG. 4 and the basic type of monochrome type shown in FIG. Optical path separation that separates the PS polarized light after the color separation shown
An example using a synthesizing unit (three-dimensional type), an example in which the color separation / synthesis system shown in FIG. 9 is formed into an “L” shape, an example in which the color separation / synthesis system shown in FIG. 10 is square, and FIG. The P-polarized light modulation optical unit 10 such as the embodiment in which the polarization beam splitter shown in FIG. 7 is formed in an “L” shape, the embodiment using the circular polarization method shown in FIG. 12, and the embodiment using the magnifying projection method shown in FIG. And the configuration of the S polarization modulation optical section 11 is simplified, and the depths of the P polarization modulation optical section 10 and the S polarization modulation optical section 11 are further shortened.
The space occupied by the polarization modulation optical section 11 can be reduced.

When the flat plate light source unit 112 is used, even if the infrared light cut filter 70 and the ultraviolet light cut filter 71 described above are deleted, substantially the same effect can be obtained.

<Description of Configuration of Other Modifications Corresponding to Claims 14, 15, 16, 18, and 21> Next, each embodiment of the projection type stereoscopic image display system according to the present invention, that is, the monochrome type shown in FIG. Of the color type shown in FIG. 4, the color type shown in FIG. 4, and the color separation shown in FIG. Then, the optical path separation for separating the PS polarized light
An example using a synthesizing unit (three-dimensional type), an example in which the color separation / synthesis system shown in FIG. 9 is formed into an “L” shape, an example in which the color separation / synthesis system shown in FIG. 10 is square, and FIG. 22 is a modified example of the embodiment in which the polarization beam splitter shown in FIG. 13 is formed in an “L” shape, the embodiment using the circular polarization method shown in FIG. 12, and the embodiment using the magnifying projection method shown in FIG. The flat light source main body 108 shown in FIG.
The EL light source 117 shown in FIG. 4 may be used.

In this case, the EL light source 117 is laminated on the fiber plate 118 serving as the substrate of the EL light source 117, the transparent electrode film 119 laminated on the back surface of the fiber plate 118, and the back surface of the transparent electrode film 119. And an EL layer that is laminated on the back surface of the insulating layer 120 and emits light to generate light when an electric field is applied.
The light emitting layer 121 and an insulating layer 1 laminated on the back surface of the EL light emitting layer 121 and electrically insulating the EL light emitting layer 121.
22 and a back surface of the insulating layer 122,
A back electrode film 123 for applying an electric field to the light emitting layer 121 is provided, and a voltage is applied to the back electrode film 123 insulated from the EL light emitting layer 121 by the two insulating layers 120 and 122 and the transparent electrode film 119. When the EL light emitting layer 121
To generate light, which is then incident on the back surface side of the infrared light cut filter 70.

By doing so, FIG.
An example in which an optical path separation / combination unit (planar type) for separating PS polarized light after separating the colors shown in FIG. 4 and the basic type of monochrome type shown in FIG. Optical path separation that separates the PS polarized light after the color separation shown
An example using a synthesizing unit (three-dimensional type), an example in which the color separation / synthesis system shown in FIG. 9 is formed into an “L” shape, an example in which the color separation / synthesis system shown in FIG. 10 is square, and FIG. The P-polarized light modulation optical unit 10 such as the embodiment in which the polarization beam splitter shown in FIG. 7 is formed in an “L” shape, the embodiment using the circular polarization method shown in FIG. 12, and the embodiment using the magnifying projection method shown in FIG. And the configuration of the S polarization modulation optical section 11 is simplified, and the depths of the P polarization modulation optical section 10 and the S polarization modulation optical section 11 are further shortened.
The space occupied by the polarization modulation optical section 11 can be reduced. The spectrum of the EL light source only needs to have a spectrum sensitive to the photoconductive layer constituting the spatial light modulator, and in some cases, the infrared light cut filter, the ultraviolet light cut filter, or the band pass filter is omitted. Is also possible.

<Description of Configuration of Other Modifications> Next, each embodiment of the projection type stereoscopic image display system according to the present invention, that is, the basic type of monochrome type shown in FIG. 1 and the basic type of color type shown in FIG. An example using an optical path separation / combination unit (planar type) for separating the PS polarized light after the color separation shown in FIG. 5, an optical path separation / combination unit for separating the PS polarized light after the color separation shown in FIG. Examples using (three-dimensional type), examples in which the color separation / combination system shown in FIG. 9 is formed in an “L” shape, examples in which the color separation / combination system shown in FIG. 10 is formed in a square, and FIG. 11 are shown. The first and second modified examples of the embodiment in which the polarization beam splitter has an “L” shape, the embodiment using the circular polarization method shown in FIG. 12, and the embodiment using the magnifying projection method shown in FIG. 2 Use the spatial light modulator 23 having the antireflection films 32 and 34 That is, these first, either one of the second anti-reflection film 32 and 34, or may be used with a spatial light modulator remove both.

Even in this case, the monochrome type basic shape shown in FIG. 1 and the color type basic shape shown in FIG.
Example using an optical path separation / combination unit (planar type) for separating PS polarized light after color separation shown in FIG. 5, an optical path separation / combination unit for separating PS polarized light after color separation shown in FIG. Examples using (three-dimensional type), examples in which the color separation / combination system shown in FIG. 9 is formed into an “L” shape, examples in which the color separation / combination system shown in FIG. 10 is square, and shown in FIG. An example in which the polarization beam splitter has an "L" shape, an example using the circular polarization system shown in FIG. 12, an example using the magnifying projection system shown in FIG. 13, and modifications of these examples and the like. The same effect as can be obtained.

<Description of Configuration of Other Modifications> Next, the respective embodiments of the projection type stereoscopic image display system according to the present invention, that is, the basic monochrome type shown in FIG. 1 and the basic color type shown in FIG. An example using an optical path separation / combination unit (planar type) for separating the PS polarized light after the color separation shown in FIG. 5, an optical path separation / combination unit for separating the PS polarized light after the color separation shown in FIG. Examples using (three-dimensional type), examples in which the color separation / combination system shown in FIG. 9 is formed in an “L” shape, examples in which the color separation / combination system shown in FIG. 10 is formed in a square, and FIG. 11 are shown. Examples in which the polarization beam splitter has an "L" shape, examples using the circular polarization method shown in FIG. 12, examples using the enlarged projection method shown in FIG. A first antireflection film between the second transparent electrode 31 and the second transparent substrate 33. The spatial light modulator 23 arranged two
The first transparent electrode 31 and the first transparent electrode 31 are used.
The antireflection film 32 is replaced with the first antireflection film 32.
The spatial light modulator having the second transparent electrode 31 may be used between the second transparent substrate 33 and the second transparent substrate 33.

Even in this case, the monochrome basic form shown in FIG. 1 and the color basic form shown in FIG.
Example using an optical path separation / combination unit (planar type) for separating PS polarized light after color separation shown in FIG. 5, an optical path separation / combination unit for separating PS polarized light after color separation shown in FIG. Examples using (three-dimensional type), examples in which the color separation / combination system shown in FIG. 9 is formed into an “L” shape, examples in which the color separation / combination system shown in FIG. 10 is square, and shown in FIG. An example in which the polarization beam splitter has an "L" shape, an example using the circular polarization system shown in FIG. 12, an example using the magnifying projection system shown in FIG. 13, and modifications of these examples and the like. The same effect as can be obtained.

<Description of Configuration of Other Modifications> Next, the respective embodiments of the projection type stereoscopic image display system according to the present invention, that is, the monochrome basic form shown in FIG. 1 and the color basic form shown in FIG. An example using an optical path separation / combination unit (planar type) for separating the PS polarized light after the color separation shown in FIG. 5, an optical path separation / combination unit for separating the PS polarized light after the color separation shown in FIG. Examples using (three-dimensional type), examples in which the color separation / combination system shown in FIG. 9 is formed in an “L” shape, examples in which the color separation / combination system shown in FIG. 10 is formed in a square, and FIG. 11 are shown. An example in which the polarization beam splitter has an "L" shape, an example using the circular polarization method shown in FIG. 12, an example using the magnifying projection method shown in FIG. 13 and the like, and modifications of these examples. As a result, the photoconductive layer 30 of the spatial light modulator 23 has mechanical strength. As an example, the first transparent substrate 25, the second transparent substrate 33, and the like are made to have mechanical strength to form the spatial light modulation element 23. However, the photoconductive layer 30 is formed of a single crystal, The photoconductive layer 30 may secure the mechanical strength of the entire spatial light modulation element 23, so that the first transparent substrate 25 and the like shown in FIG. 2 may be eliminated.

Even in this manner, the monochrome basic form shown in FIG. 1 and the color basic form shown in FIG.
Example using an optical path separation / combination unit (planar type) for separating PS polarized light after color separation shown in FIG. 5, an optical path separation / combination unit for separating PS polarized light after color separation shown in FIG. Examples using (three-dimensional type), examples in which the color separation / combination system shown in FIG. 9 is formed into an “L” shape, examples in which the color separation / combination system shown in FIG. 10 is square, and shown in FIG. An example in which the polarization beam splitter has an "L" shape, an example using the circular polarization system shown in FIG. 12, an example using the magnifying projection system shown in FIG. 13, and modifications of these examples and the like. The same effect as can be obtained.

<Description of Configuration of Other Modifications> Next, the respective embodiments of the projection type stereoscopic image display system according to the present invention, that is, the basic type of monochrome type shown in FIG. 1 and the basic type of color type shown in FIG. An example using an optical path separation / combination unit (planar type) for separating the PS polarized light after the color separation shown in FIG. 5, an optical path separation / combination unit for separating the PS polarized light after the color separation shown in FIG. Examples using (three-dimensional type), examples in which the color separation / combination system shown in FIG. 9 is formed in an “L” shape, examples in which the color separation / combination system shown in FIG. 10 is formed in a square, and FIG. 11 are shown. As a modified example such as an example in which the polarization beam splitter has an “L” shape, an example using the circular polarization method shown in FIG. 12, and an example using the magnifying projection method shown in FIG. External light cut filter 70 and band pass filter 72
Although a simple matrix type (or active matrix type) liquid crystal display device 68 provided with the above is used, a simple structure in which either or both of the infrared light cut filter 70 and the bandpass filter 72 are removed is used. A matrix type (or active matrix type) liquid crystal display device may be used.

Even in this case, since it is possible to display the image for the right eye and the image for the left eye, which are almost the same as those of the simple matrix type (or active matrix type) liquid crystal display device 68 described above, these infrared rays are displayed. The light cut filter 70 and / or the band pass filter 72 or both of them can be deleted to reduce the number of parts and the cost, and further reduce the depths of the P polarization modulation optical section 10 and the S polarization modulation optical section 11. Thus, the space occupied by the P polarization modulation optical section 10 and the S polarization modulation optical section 11 can be reduced.

<Description of Configuration of Other Modifications> Next, each embodiment of the projection type stereoscopic image display system according to the present invention, that is, the basic type of monochrome type shown in FIG. 1 and the basic type of color type shown in FIG. An example using an optical path separation / combination unit (planar type) for separating the PS polarized light after the color separation shown in FIG. 5, an optical path separation / combination unit for separating the PS polarized light after the color separation shown in FIG. Examples using (three-dimensional type), examples in which the color separation / combination system shown in FIG. 9 is formed in an “L” shape, examples in which the color separation / combination system shown in FIG. 10 is formed in a square, and FIG. 11 are shown. As a modified example such as an example in which the polarization beam splitter has an “L” shape, an example using the circular polarization method shown in FIG. 12, and an example using the magnifying projection method shown in FIG. Image display device for the right eye of the unit 10 and left eye image of the S polarization modulation optical unit 11 As of the display device, a cathode ray tube 21
I am trying to use the CRT 2
Instead of 1, the display device other than the liquid crystal display panel body 77 capable of displaying a moving image, such as a plasma display panel or an EL display panel, may be used.

By doing so, the monochrome type basic shape shown in FIG. 1 and the color type basic shape shown in FIG.
An example using an optical path separation / combination unit (planar type) for separating the PS polarized light after the color separation shown in FIG. 5, an optical path separation / combination unit for separating the PS polarized light after the color separation shown in FIG. Examples using (three-dimensional type), examples in which the color separation / combination system shown in FIG. 9 is formed in an “L” shape, examples in which the color separation / combination system shown in FIG. 10 is formed in a square, and FIG. 11 are shown. P-polarization modulation optics shown in modified examples such as an example in which the polarization beam splitter is formed in an “L” shape, an example using the circular polarization method shown in FIG. 12, and an example using the magnifying projection method shown in FIG. Part 10
Also, the depth of the S polarization modulation optical section 11 can be shortened to reduce the space occupied by the P polarization modulation optical section 10 and the S polarization modulation optical section 11, and the configuration can be diversified.

<< Operation of Projection-Type Stereoscopic Image Display System >> Next, the operation of the projection-type stereoscopic image display system according to the present invention will be described with reference to the first embodiment shown in FIG. Note that, here, as the liquid crystal 37 of the light modulation layer 30 which is a component of the spatial light modulation element 23 shown in FIG. 2, a 45 degree twisted nematic liquid crystal having a positive dielectric anisotropy is used. Accordingly, when there is no writing light (in the off state, in the state in which a sufficient electric field is applied in the direction perpendicular to the entrance surface and the exit surface of the first transparent substrate 25 constituting the spatial light modulation element 23). Most of the voltage applied to the spatial light modulation element 23 is
Is applied to the light modulating layer 30.
The electric field applied to the 5 degree twisted nematic liquid crystal layer becomes small, each liquid crystal molecule of the 45 degree twisted nematic liquid crystal layer maintains the initial alignment state, and the long axis of the liquid crystal molecule close to the surface of the dielectric multilayer mirror 29 and the second axis. The long axes of the liquid crystal molecules adjacent to the transparent electrode 31 are oriented at an angle of 45 degrees with each other.

At this time, when the reading light is incident on the second antireflection film 34 side, the polarization plane of the reading light is along the twist direction of the liquid crystal molecules due to the optical rotatory power of the liquid crystal 37 constituting the 45 degree twisted nematic liquid crystal layer. First, after rotating by 45 degrees, it is reflected by the dielectric multilayer film mirror 29 and again enters the 45 degree twisted nematic liquid crystal layer, and when passing through the 45 degree twisted nematic liquid crystal layer, the polarization plane of the read light is changed. After being rotated by 45 degrees along the twist direction of the liquid crystal molecules and returned to the original rotation state, the second transparent electrode 31, the first antireflection film 32, the second transparent substrate 33, the second antireflection film. The light is emitted to the outside via 34.

Therefore, in this state, even if the read light is incident on the second antireflection film 34 side of the spatial light modulator 23, the read light emitted from the spatial light modulator 23 (the image for the right eye or the left eye). The polarization plane of the (eye image) has the same rotation angle as the polarization plane of the original readout light, and the readout light (right eye image or left eye image) emitted from the spatial light modulator 23 passes through the polarization beam splitter 16. Since the light is transmitted (or reflected) to the light source unit 7 side, the projection optical unit 9
Is not emitted from the outside.

Further, the first component of the spatial light modulator 23
When writing light is incident (in a state other than the off state) in a state in which a sufficient electric field is applied in a direction perpendicular to the entrance surface and the exit surface of the transparent substrate 25, the photoconductive layer 2
The impedance of 7 decreases, and most of the voltage applied to the spatial light modulation element 23 is applied to the light modulation layer 30. Therefore, the 45 degree twisted nematic liquid crystal forming the light modulation layer 30 is formed. The electric field applied to the layer is increased, the optical rotatory power of each liquid crystal molecule of the 45 ° twisted nematic liquid crystal layer is decreased, and the birefringence effect is generated.

At this time, when the reading light is incident on the second antireflection film 34 side, the reading light causes the 45 ° twisted nematic liquid crystal layer due to the birefringence effect generated in the liquid crystal 37 constituting the 45 ° twisted nematic liquid crystal layer. After passing through, it is reflected by the dielectric multilayer film mirror 29, and again 45
When incident on the twisted nematic liquid crystal layer and passing through the 45 degree twisted nematic liquid crystal layer, the phase difference (retardation) between the two linearly polarized light components of the reading light depending on the amount of the writing light is 0 to 180 degrees. The second transparent electrode 31, the first antireflection film 32, the second transparent substrate 33, and the second antireflection film 34 after being changed within the range of up to
It is emitted to the outside via.

Therefore, in this state, when the read light is incident on the second antireflection film 34 side of the spatial light modulator 23, the read light emitted from the spatial light modulator 23 (the image for the right eye or the left eye). The polarization plane of the read image) is different from the polarization plane of the original read light, and part or all of the read light (the image for the right eye or the image for the left eye) emitted from the spatial light modulation element 23 passes through the polarization beam splitter 16. Since the light is reflected (or transmitted) and goes toward the projection optical unit 9 side without going to the light source unit 7 side, the projection optical unit 9 enlarges and projects this.

As described above, the read light (the image for the right eye or the image for the left eye) emitted from the spatial light modulator 23 is generally in the elliptically polarized state according to the amount of the writing light. The spatial light modulator 23 can display an image having arbitrary brightness between the on state and the off state.

As described above, in the spatial light modulator 23 used in the projection type stereoscopic image display system according to the present invention, the polarization state of the reading light is adjusted according to the intensity of the writing light. The light modulation element 23 and the polarization beam splitter 16 are combined so that the light whose polarization state has not changed can be blocked by the polarization beam splitter 16 and only the light whose polarization state has changed can be passed. While making writing light including an image to be converted and a two-dimensional pattern incident on one surface side of the spatial light modulation element 23, reading light having a wavelength different from the wavelength of the writing light is provided on the other surface side of the spatial light modulation element 23. Incident on the writing light to convert an image or a two-dimensional data pattern included in the writing light into a wavelength of the reading light, and to convert this into a high contrast. In can be displayed.

Next, referring to the embodiment shown in FIG.
The operation principle of the projection type stereoscopic image display system according to the present invention having the spatial light modulator 23 will be described in detail.

First, white light is generated by the light source 12 of the light source unit 7, only visible light is extracted from the white light by the infrared light cut filter 13 and the ultraviolet light cut filter 14, and the optical path separation / combination unit 8 is used. The polarization beam splitter 16 separates the visible light into P-polarized light and S-polarized light orthogonal to the P-polarized light, and then transmits the P-polarized light to the P-polarized modulation optical section 10 and the S-polarized modulation optical section 11, respectively. Then, the read light is incident on the second transparent substrate 33 side of the spatial light modulator 23.

In this state, the image signal I _R for the right eye is input to the cathode ray tube 21 of the P polarization modulation optical section 10 and an optical image corresponding to the signal intensity is formed on the fluorescent surface of the cathode ray tube 21.
When this is incident on the first transparent substrate 25 side of the spatial light modulator 23 through the lens 22 and forms an image in the photoconductive layer 27, the photoconductive layer 27 is formed according to the light intensity of the optical image.
Changes and the spatial distribution of this impedance is transmitted to the light modulation layer 30 as an applied electric field distribution, and the reading light is modulated.

Here, in the portion of the light modulation layer 30 in which a sufficiently large electric field is applied, this light modulation is caused by the birefringence effect of the 45 ° twisted nematic liquid crystal layer forming the light modulation layer 30. When it passes through the layer 30, is reflected by the dielectric multilayer mirror 29, and again passes through the light modulation layer 30 and is emitted, the polarization state of the read light is changed to produce P polarized light and S polarized light. It is separated into polarized light and S-polarized light is emitted as an image for the right eye.

Then, the polarization beam splitter 16 of the optical path separating / combining unit 8 reflects only the S-polarized light of the image for the right eye emitted from the P-polarization modulation optical unit 10, and directs it to the projection optical unit 9. The S-polarized light (image for the right eye) which is incident, is enlarged and projected on the screen 2 by the lens 17 of the projection optical unit 9, and is reflected by the screen 2 is the right eye of the observer wearing the polarizing glasses 3. Is incident on.

On the other hand, in the portion of the light modulation layer 30 to which the electric field is not applied, the polarization plane of the read light is along the twist direction of the liquid crystal molecules due to the optical rotatory power of the liquid crystal forming the 45 degree twisted nematic liquid crystal layer. Then, after being rotated by 45 degrees, it is reflected by the dielectric multilayer mirror 29,
When the light enters the 45-degree twisted nematic liquid crystal layer again and passes through the 45-degree twisted nematic liquid crystal layer,
The polarization plane of the readout light is along the twist direction of the liquid crystal molecules,
Original rotation state (P polarized light) rotated by 45 degrees
The second transparent electrode 31 and the first antireflection film 3 after being returned to
2. Since the light is emitted to the outside through the second transparent substrate 33 and the second antireflection film 34, when it is incident on the polarization beam splitter 16, the light is transmitted through the polarization beam splitter 16 to the light source section 7 side. It enters and is hardly projected on the screen 2 via the projection optical unit 9.

As is clear from the above description, the polarization beam splitter 16 of the optical path separation / combination unit 8 separates the visible light from the light source unit 7 to generate P-polarized light, and this P-polarized light modulation optical unit. The P-polarized light is separated into P-polarized light and S-polarized light according to the optical image intensity of the right-eye image that changes according to the right-eye image signal I _R by 10, and only the S-polarized light is obtained. After being projected on the screen 2 via the polarization beam splitter 16 and the lens 17,
The light passes through only the right-eye lens 5 of the polarizing glasses 3 and enters the right eye of the observer to show the right-eye image to the observer.

Similarly, the S-polarized light separated by the polarization beam splitter 16 is S-polarized according to the optical image intensity of the left-eye image that changes according to the left-eye image signal I _L by the S-polarization modulation optical unit 11. Wave light and P-polarized light are separated, and only P-polarized light is projected on the screen 2 via the polarization beam splitter 16 and the lens 17, and then passes through only the lens 6 for the left eye of the polarized glasses 3. , Enters the left eye of the observer,
Show the image for the left eye to this observer.

<< Prototype of Spatial Light Modulation Element >> Next, since the image magnifying projection display 4 and the like can be configured by using existing optical elements and electronic equipment except for the spatial light modulation element 23 and the like. Here, the spatial light modulator 23 using a 45 degree twisted nematic liquid crystal is used.
The trial production of is explained.

First, various materials can be used as a material for forming the spatial light modulator 23, but here, the photoconductive layer 27 is made of Bi ₁₂ Si having a thickness of 0.25 mm.
Using an O ₂₀ crystal plate, the light absorption layer 28 has a thickness of 1.3 μm.
The diamond-like carbon film is used as the dielectric multilayer film mirror 29, and a TiO ₂ film and a SiO ₂ film are alternately formed as 1
A 7-layered multilayer film having a thickness of 1.3 μm was used, a nematic liquid crystal having the characteristics shown in Table 1 was used as the liquid crystal used in the light modulation layer 30, and In was used as the first transparent electrode 26 and the second transparent electrode 31. Thickness of 0. ₂ O ₃ with 5% Sn added.
A 05 μm ITO transparent electrode film is used, a MgF ₂ film is used as the first antireflection film 32, and a second antireflection film 34 is used.
As an example, the spatial light modulator 23 using a CeF ₃ film, a ZrO ₂ film, and a MgF ₂ film will be described in detail as a manufacturing method.

[0282]

[Table 1] First, a wafer having an appropriate thickness is cut out from a Bi ₁₂ SiO ₂₀ crystal and optically polished to a thickness of 0.25 mm to form a photoconductive layer 27. Since the photoconductive layer 27 has a considerably large thickness, The first transparent substrate 25 shown in FIG. 2 is omitted.

After that, an ITO transparent electrode having a thickness of 0.05 μm is vapor-deposited on one surface of the photoconductive layer 27 to form the first transparent electrode 26.

Next, plasma C using methane gas as a raw material
The thickness of the other surface of the Bi ₁₂ SiO ₂₀ crystal was measured by the VD method.
A diamond-like carbon film having a thickness of 3 μm is formed and used as the light absorption layer 28. The diamond-like carbon film obtained at this time has a value of 0.
It shows a transmittance of 02% and its specific resistance is 2.2 × 1.
Was 0 ⁸ Ωcm.

Next, by using the ion beam assist (IAD) method, Ti is deposited on the diamond-like carbon film.
17 layers of O ₂ films and SiO ₂ films are alternately laminated to form a dielectric multilayer film mirror 29 having a thickness of 1.3 μm. In this case, the IAD method is a film forming method of irradiating a substrate on which a vapor-deposited film is formed with low-energy oxygen ions during electron beam evaporation, and forms a thin film having a high refractive index and a low light absorption property at a low temperature. be able to. Then, while the dielectric multilayer film mirror 29 is being formed, by changing the energy of the oxygen ion beam with which the substrate is irradiated,
The specific resistance of the dielectric multi-layer film mirror 29 is controlled to set it to a desired value.

The dielectric multi-layered film mirror 29 obtained by the above-mentioned method has a value of 9 for light having a wavelength of 500 to 590 nm.
It exhibited a high reflectance of 8% or more.

Then, a MgF ₂ film is formed on the side of the glass substrate to be the second transparent substrate 33 on which the light modulation layer 30 is laminated by the electron beam evaporation method to form the first antireflection film 32. , On the other surface of the glass substrate,
A CeF ₃ film, a ZrO ₂ film, and a MgF ₂ film were formed by an electron beam evaporation method to form a second antireflection film 34, and then 5% of In ₂ O ₃ was formed on the first antireflection film 32.
An ITO transparent electrode film having a thickness of 0.05 μm formed by adding Sn is formed as a second transparent electrode 31.

Next, this glass substrate and the light absorbing layer 2
8 and the dielectric multilayer mirror 29 are formed of Bi ₁₂ S.
A frame-shaped sealing member having a thickness of 5 μm was sandwiched by a thin plate of iO ₂₀ crystal to form an empty cell, and a nematic liquid crystal having the characteristics shown in Table 1 (specific resistance of this nematic liquid crystal was 2 × 10 ¹¹ Ωcm Above), diameter 5 μm
After adding an appropriate amount of the spacer spheres, the mixed solution was injected into the empty cell to seal the cell inlet, and the spatial light modulator 23 was manufactured.

<Image Display Characteristics of Image Enlargement Projection Display> Next, the prototype spatial light modulator 23 was set in the image display characteristic measuring device 210 shown in FIG. 32, and the image display characteristics were measured.

In this case, the image display characteristic measuring device 210 has a writing light source section 211, a writing light measuring section 212, a reading light source section 213, an optical path separating / combining section 214,
The display light measuring section 215 is provided, and the writing light source section 2 is provided.
11 generates blue writing light, and while monitoring the light intensity by the writing light measuring unit 212, 100
A light source for reading while writing an image while being incident on one surface side of the spatial light modulation element 23, which is a measurement target of image display characteristics, to which a rectangular wave voltage of 80 V (effective value) having a repetition frequency of Hz is applied. The section 213 generates green read light, the optical path separation / combination section 214 separates the S-polarized light, and the S-polarized light is incident on the other surface side of the spatial light modulation element 23. P-polarized light is selected from the display light emitted from the surface side, and the light intensity is measured by the display light measuring unit 215.

The writing light source unit 211 includes a 300 W xenon lamp light source 216 which emits white light and an opening 217.
An aperture 218 for converting the white light emitted from the xenon lamp light source 216 into a spot-shaped white light, and a lens 219 for converting the spot-shaped white light emitted from the opening 217 of the aperture 218 into a parallel white light. The infrared light cut filter 210 that cuts the infrared light contained in the white light transmitted through the lens 219, and the ultraviolet light contained in the white light transmitted through the infrared light cut filter 210 are The ultraviolet light cut filter 211 to be cut, and light in a specific wavelength range included in the white light transmitted through the ultraviolet light cut filter 211, that is, the spatial light modulator 23.
Of the bandpass filter 212 that transmits light of a spectrum (400 nm to 500 nm) that sensitizes the Bi ₁₂ SiO ₂₀ crystal that constitutes the photoconductive layer 27 of FIG. Of the fixed polarization plate 213, which is rotatably arranged with respect to the fixed polarization plate 213, and transmits light of a specific rotation direction out of the light transmitted through the fixed polarization plate 213. And a polarizing plate 214.

Then, white light is generated by the xenon lamp light source 216, and the aperture 218 and the lens 2 are emitted.
The white light is collimated by 19 and an infrared light cut filter 210 and an ultraviolet light cut filter 211 are provided.
After extracting the light (blue light) in the specific wavelength range in the parallel white light by the bandpass filter 212, the fixed polarizing plate 213 and the rotating polarizing plate 214 are used to extract the light depending on the angle formed by the light transmitting axis directions. The transmitted light intensity of the blue light transmitted through the bandpass filter 212 is adjusted, and the blue light whose intensity has been adjusted is used as the written light.
It is incident on 12.

The writing light measuring section 212 collects the writing light reflected by the beam splitter 215 and the beam splitter 215 which reflects a part of the writing light emitted from the writing light source section 211 and transmits the rest. And a photodetector 217 for monitoring the incident intensity of the writing light condensed by the lens 216, and a part of the writing light emitted from the writing light source unit 211 by the beam splitter 215. Of the spatial light modulator 23 which is the object of measurement of the image display characteristics of the writing light transmitted through the beam splitter 215 while reflecting the light and condensing it on the photodetector 217 by the lens 216 to monitor its light intensity. It is incident on one side.

Further, the reading light source section 213 is a 300 W xenon lamp light source 218 which emits white light, and an aperture 220 which turns the white light emitted from the xenon lamp light source 218 through the opening 219 into point-shaped white light.
And a lens 221 for converting point-shaped white light emitted from the opening 219 of the aperture 220 into parallel white light,
An infrared light cut filter 222 that cuts infrared light contained in the white light transmitted through the lens 221, and an ultraviolet light contained in the white light transmitted through the infrared light cut filter 222 is cut. UV light cut filter 22
3 and light in a specific wavelength range included in the white light transmitted through the ultraviolet light cut filter 223, for example, 500 nm to
And a bandpass filter 224 that transmits light of 590 nm (green light).

Then, white light is generated by the xenon lamp light source 218, and the aperture 220 and the lens 2 are
The white light is converted into parallel light by 21 and an infrared light cut filter 222 and an ultraviolet light cut filter 223 are provided.
Also, the bandpass filter 224 extracts light (green light) in the specific wavelength range in the parallel white light, and makes it be the read light and makes it enter the optical path separation / synthesis unit 214.

The optical path separating / combining unit 214 is equipped with a polarization beam splitter 225 which reflects only the S polarized light in the read light emitted from the read light source unit 213 and transmits the other light. Splitter 22
5 reflects only the S-polarized light in the read light (green light) emitted from the read light source unit 213 and makes it incident on the other surface side of the spatial light modulation element 23. After the light emitted from the other surface side is taken in, only the light in the P-polarized state is transmitted by the polarization beam splitter 225 and is made incident on the display light measurement unit 215 as display light.

The display light measuring unit 215 collects the display light emitted from the optical path separating / combining unit 214 by a lens 227.
And a photodetector 231 for measuring the incident intensity of the display light condensed by the lens 230, and a lens 230 for condensing the display light that has passed through the lens 227. The display light emitted from the 214 is detected by the lens 227 and the lens 230.
The light is focused on 31 and the light intensity is measured.

<Diversion of Measurement System> Then, in the image display characteristic measuring device 210, while writing blue light by the writing light source unit 211 and writing an image in the spatial light modulator 23, the reading light source unit is used. A green reading light is generated by 213, the S-polarized light is extracted from the green reading light by the optical path separating / combining unit 214, and the image written in the spatial light modulator 23 is read out. Although the measurement system for the S polarization modulation optical system is configured, the reading light source unit 2
13 only by changing the characteristics of the bandpass filter 224 so that only blue light or red light is selected from the white light obtained by the xenon lamp light source 218 of FIG.
The image display characteristic measuring device 210 shown in 2 can be changed to a measurement system for a blue S polarization modulation optical system or a red S polarization modulation optical system. The polarization beam splitter 22 is also transmitted through the bandpass filter 224.
Of the read light incident on the light beam No. 5, a P-polarized light modulation optical system that modulates the P-polarized light that passes through the polarization beam splitter 225 is configured, and if the characteristics of the bandpass filter 224 are changed, P-polarized light modulation for red, green, and blue light is performed. A measurement system for the optical system can be easily constructed.

<Characteristics of Spatial Light Modulator in Present Invention>
Then, in order to confirm the characteristics of the spatial light modulation element 23 described above, the rotary polarizing plate 214 of the image display characteristic measuring device 210 shown in FIG. 32 is rotated, and the relationship between the writing light intensity and the display light intensity is tested. The results shown in FIG. 33 are obtained for the green S polarization modulation optical system that modulates the S polarized light, and the results shown in FIG. 34 are obtained for the green P polarization modulation optical system that modulates the P polarized light. Was obtained. In FIGS. 33 and 34, the transmittance on the vertical axis is S for green.
Polarization modulation optical system (or P polarization modulation optical system for green)
In the above, the transmitted light intensity when the read light (display light) obtained by converting the S-polarized light (or P-polarized light) into the P-polarized light (or S-polarized light) passes through the lens 230 is defined as the polarization beam splitter 225. It is the intensity of the read light incident on the and is a standardized value.

As is clear from the contents shown in FIGS. 33 and 34, the S-polarization modulation optical system for green (or the P-polarization modulation optical system for green) has an extinction ratio of about 150: 1.
It is possible to secure a standardized read light intensity of about 30%.

<Measurement of Blue P-Polarization Modulation Optical System to Red S-Polarization Modulation Optical System> The above-mentioned experiment was performed on an optical system other than the green P-polarization modulation optical system and the green S-polarization modulation optical system, that is, blue. The same experiment was performed on the P polarization modulation optical system for blue, the S polarization modulation optical system for blue, the P polarization modulation optical system for red, and the S polarization modulation optical system for red. Also for the S polarization modulation optical system for use in the optical system, the same light modulation characteristics as those of the P polarization modulation optical system for green and the S polarization modulation optical system for green could be obtained.

<Motion Picture Characteristic of Spatial Light Modulation Element> Next, in order to measure the motion picture characteristics of the spatial light modulation element 23 and the like, a green S polarization modulation optical system is used and the polarization direction of the rotary polarizing plate 214 is adjusted. The polarization direction of the rotating polarizing plate 214 is made the same as that of the fixed polarizing plate 213, and an active matrix type liquid crystal panel (90-degree twist) is provided between the rotating polarizing plate 214 and the fixed polarizing plate 213. Nematic liquid crystal panel, number of pixels: 480 × 440, diagonal length:
(1.32 inch) and then beam splitter 2
Instead of 15, an image lens was provided to configure an image system for forming an image of the liquid crystal panel on the spatial light modulator 23.

Then, using this image system, 6
An image was projected on a high gain type (reflection gain “8”) reflective screen having a diagonal length of 0 inch, and its moving image display characteristics were evaluated. Contrast ratio and about 150 cd / m ²
And the peak luminance of. Moreover, the scanning electrodes of 15 μm and 20 μm formed on the liquid crystal panel are clearly displayed on the reflection surface of the reflection type screen, and the limit resolution of 33 lp / mm or more (light constituting the spatial light modulation element 23) is obtained. The maximum value of the number of black-and-white grating pairs that can be written in the 1 mm width of the conductive layer 27 and can be read from the light modulation layer 27 is defined as the limit resolution, and this is defined as lp [line pairs] / mm. Is displayed)
I found out that

<Measurement of characteristics in the entire visible light range> Next,
By using the two spatial light modulators 23 having a high reflectance over the entire visible light range and the two liquid crystal panels, the projection type three-dimensional image display system according to the present invention shown in FIG. Display experiment was carried out, and it was found that about 50:50 on the reflection surface of the high gain type (reflection gain “8”) reflection type screen having a diagonal length of 60 inches described above.
A contrast ratio of 1 and a white peak luminance of 1000 cd / m ² could be obtained.

<Resolution characteristics and distortion characteristics of the projection type stereoscopic image display system> Further, the image magnifying projection display 4
Even if the size of the projected image is changed by changing the distance from the screen 2 and the screen 2, the resolution of the image displayed in the central part of the screen 2 and the resolution of the image displayed in the peripheral part are almost the same. It was possible to confirm that the projection type stereoscopic image display system 1 did not cause the trapezoidal distortion that occurred in the conventional projection type stereoscopic image display system at all.

<Display Characteristics of Non-Stereoscopic Image of Projection-Type Stereoscopic Image Display System> Further, with respect to the P-polarization modulation optical section 10 and the S-polarization modulation optical section 11 of the projection-type stereoscopic image display system 1 shown in FIG. When the same image signal is written to the P polarization modulation optical section 10 and the S polarization modulation optical section 11 to display a non-stereoscopic image, the non-stereoscopic image is displayed. , It was possible to display a non-stereo image having almost the same resolution as a stereo image and having twice the brightness.

<Summary of Experimental Results> As is clear from the above experimental results, the projection type stereoscopic image display system according to the present invention, for example, the projection type stereoscopic image display system 1 shown in FIG.
Then, the single image magnifying projection display 4 can secure almost the same brightness as the image magnifying projection displays of the two units used in the conventional projection type stereoscopic image display system, and the image magnifying projection can be performed. It is possible to easily adjust the positions of the display 4 and the screen 2.

Further, it is possible to display an image having substantially the same resolution both in the central portion of the screen 2 and in the peripheral portion, and to display a stereoscopic image or a non-stereoscopic image only by switching the image signal. Can be displayed, and when a non-stereoscopic image is displayed, it is possible to secure approximately twice as much brightness as an image displayed by a conventional projection type stereoscopic image display system.

<< Effects of Embodiments According to the Present Invention >> As described above, in the projection type stereoscopic image display system according to the present invention, for example, in the projection type stereoscopic image display system 1 of the first embodiment shown in FIG. 7 generates visible light, and the optical path separation / combination unit 8 separates the visible light into two and makes them enter the P-polarization modulation optical unit 10 and the S-polarization modulation optical unit 11, respectively. Modulation optics 1
S-polarized modulated light (light of the image for the right eye) emitted from 0, S
The P-polarized modulated light (light of the image for the left eye) emitted from the polarization-modulating optical unit 11 is taken in to synthesize one image for the right eye / left eye, and the projection optical unit 9 for the right eye / left eye. Since an image is projected on the screen 2 so that an observer wearing the polarized glasses 3 can see the stereoscopic image, the following effects can be obtained in each of the above-described embodiments and modifications.

<First Effect> First, a stereoscopic image such as black-and-white, multi-color and full-color images is produced by one image enlarging / projecting display 4, 133 and an image enlarging / projecting display obtained by modifying the image enlarging / projecting display 4, 133. Can be displayed.

<Second Effect> Then, the projection optical units 9, 1
If a zoom lens is used as the lenses 17, 148, etc. used in the 38 or the like, the projection image can be freely enlarged or reduced by adjusting one zoom lens.

<Third Effect> Therefore, in the projection type stereoscopic image display systems 1 and 130 of each embodiment according to the present invention and the projection type stereoscopic image display systems corresponding to the projection type stereoscopic image display systems 1 and 130, respectively. The manufacturing costs of the light source, the projection optical system, and the like can be reduced, and thus the manufacturing costs of the projection type stereoscopic image display systems 1 and 130 as a whole can be significantly reduced.

<Fourth Effect> In the conventional projection type stereoscopic image display system 501, the shape of the image for the right eye and the shape of the image for the left eye of the image projected on the screen 506 are completely square. A trapezoidal distortion occurs because it cannot be a rectangle or a rectangle, but the projection type stereoscopic image display systems 1 and 130 of each embodiment according to the present invention and the projections obtained by modifying the projection type stereoscopic image display systems 1 and 130. In the stereoscopic image display system, since the image magnifying projection displays 4, 133 and the like can be directly faced to the screens 2, 131, it is possible to prevent such trapezoidal distortion.

<Fifth Effect> Further, in the conventional projection type stereoscopic image display system 501, it is not possible to prevent the resolution of the image from being lowered in the peripheral portion of the screen 506, but each of the embodiments according to the present invention. In the projection type stereoscopic image display systems 1 and 130 and the projection type stereoscopic image display systems corresponding to the projection type stereoscopic image display systems 1 and 130, even in the central portions of the screens 2 and 131,
Images with almost the same resolution can be displayed in the peripheral portion as well.

<Sixth Effect> Further, in the conventional projection type stereoscopic image display system 501, the image magnifying projection display 502 for the right eye and the image magnifying projection display 5 for the left eye are provided.
03, position adjustment and force adjustment of the right-eye image projected on the screen 506, position adjustment and force adjustment of the left-eye image, and superposition of these right-eye image and left-eye image (registration ) Adjustment is required, but in the projection type stereoscopic image display systems 1 and 130 of each embodiment according to the present invention and the projection type stereoscopic image display systems corresponding to the projection type stereoscopic image display systems 1 and 130, the projection optical unit is used. By simply performing adjustment work such as focus adjustment of the lenses 17 and 148 used in the cameras 9 and 138, the clear images for the right eye and the images for the left eye can be registered in good condition on the screens 2 and 131. Can be displayed.

<Seventh Effect> Further, in the projection type stereoscopic image display systems 1 and 130 of the respective embodiments according to the present invention and the projection type stereoscopic image display systems corresponding to the projection type stereoscopic image display systems 1 and 130, The brightness of the image per unit projected on the screens 2, 131 by the image magnifying and projecting displays 4, 133, etc. is determined by the image magnifying and projecting display 502 for the right eye and the image for the left eye of the conventional projection type stereoscopic image display system 501. It is possible to increase the brightness of an image projected on the screen 506 by the enlarged projection display 503 to about twice the brightness of one image.

[0317]

As described above, according to the present invention, the first to seventh effects described above can be obtained in claims 1 to 24.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of a monochrome basic type in a projection type stereoscopic image display system according to the present invention.

FIG. 2 is a perspective view showing a detailed configuration example of the spatial light modulator shown in FIG.

FIG. 3 is a configuration diagram showing an embodiment of a color basic type in the projection type stereoscopic image display system according to the present invention.

FIG. 4 is a configuration diagram showing an embodiment of a projection type stereoscopic image display system according to the present invention, which has a planar color separation / synthesis unit for separating PS polarized light after color separation.

FIG. 5 is a configuration diagram showing an embodiment of a projection type stereoscopic image display system according to the present invention, which has a stereoscopic color separation / synthesis unit for separating PS polarized light after color separation.

FIG. 6 is a rear view showing a detailed configuration example of the blue separation / combination system shown in FIG.

FIG. 7 is a rear view showing a detailed configuration example of the separation / synthesis system for green color shown in FIG.

8 is a rear view showing a detailed configuration example of the red separation / combination system shown in FIG.

FIG. 9 is a configuration diagram showing an embodiment in which a color separation / synthesis system is formed in an “L” shape in the projection type stereoscopic image display system according to the present invention.

FIG. 10 is a configuration diagram showing an embodiment in which the color separation / synthesis system is a square in the projection type stereoscopic image display system according to the present invention.

FIG. 11 is a configuration diagram showing an embodiment in which the polarization beam splitter is formed in an “L” shape in the projection type stereoscopic image display system according to the present invention.

FIG. 12 is a configuration diagram showing an embodiment in which a right-eye image and a left-eye image are circularly polarized in different rotation directions in the projection type stereoscopic image display system according to the present invention.

FIG. 13 is a configuration diagram showing an embodiment of the projection type stereoscopic image display system according to the present invention using a reflection enlargement mechanism.

FIG. 14 is a configuration diagram showing an embodiment using a signal switching device in the projection type stereoscopic image display system according to the present invention.

FIG. 15 is a configuration diagram showing a modification in which the polarization beam splitter used in each of the embodiments shown in FIGS.

16 is a configuration diagram showing a modified example in which the P-polarization modulation optical section, the S-polarization modulation optical section, and the optical path separating / combining section used in each of the embodiments shown in FIGS. 1 to 14 are modified.

FIG. 17 is a configuration diagram showing a modified example in which the P polarization modulation optical section, the S polarization modulation optical section, and the optical path separation / combination section used in each of the embodiments shown in FIGS. 1 to 14 are modified.

FIG. 18 is a configuration diagram showing a modified example in which the P-polarization modulation optical section and the S-polarization modulation optical section used in each of the embodiments shown in FIGS. 1 to 14 are modified.

FIG. 19 is a configuration diagram showing a modified example in which the P polarization modulation optical section and the S polarization modulation optical section used in each of the embodiments shown in FIGS. 1 to 14 are modified.

20 is a configuration diagram showing a modified example in which the P polarization modulation optical section and the S polarization modulation optical section used in each of the embodiments shown in FIGS. 1 to 14 are modified.

FIG. 21 is a configuration diagram showing a modified example in which the P polarization modulation optical section and the S polarization modulation optical section used in each of the embodiments shown in FIGS. 1 to 14 are modified.

22 is a configuration diagram showing a detailed configuration example of the flat light source shown in FIG. 21. FIG.

23 is a configuration diagram showing a modified example in which the flat light source shown in FIG. 21 is modified.

24 is a configuration diagram showing a modified example in which the flat light source shown in FIG. 21 is modified.

FIG. 25 is a schematic diagram showing a relational example of the respective embodiments shown in FIGS. 1 to 14 in the projection type stereoscopic image display system according to the present invention.

FIG. 26 is a schematic diagram showing an example of the relationship between each of the embodiments shown in FIGS. 1 to 14 in the projection type stereoscopic image display system according to the present invention.

FIG. 27 is a schematic diagram showing an example of the relationship between each of the embodiments shown in FIGS. 1 to 14 in the projection type stereoscopic image display system according to the present invention.

FIG. 28 is a schematic diagram showing an example of the relationship between each of the embodiments shown in FIGS. 1 to 14 in the projection type stereoscopic image display system according to the present invention.

FIG. 29 is a schematic diagram showing an example of the relationship between the embodiments shown in FIGS. 1 to 14 in the projection type stereoscopic image display system according to the present invention.

FIG. 30 is a schematic diagram showing an example of a relation of a modification to each of the embodiments shown in FIGS. 1 to 14 in the projection type stereoscopic image display system according to the present invention.

FIG. 31 is a schematic diagram showing a relationship example of a modification of each of the embodiments shown in FIGS. 1 to 14 in the projection type stereoscopic image display system according to the present invention.

FIG. 32 is a configuration diagram showing an example of an image display characteristic measuring apparatus used when measuring the performance of the projection type stereoscopic image display system according to the present invention.

FIG. 33 is a diagram showing the relationship between the writing light intensity and the standardized reading light intensity in the green S polarization modulation optical system measured by the image display characteristic measuring device shown in FIG. 32.

34 is a diagram showing the relationship between the writing light intensity and the standardized reading light intensity in the green P-polarization modulation optical system measured by a device obtained by modifying the image display characteristic measuring device shown in FIG. 32.

FIG. 35 is a configuration diagram showing an example of a conventionally known projection-type three-dimensional image display system.

36 is a configuration diagram showing a detailed configuration example of a part of the image magnifying and projecting display for the right eye used in FIG. 35. FIG.

FIG. 37 is a configuration diagram showing a detailed configuration example of the spatial light modulation element shown in FIG. 36.

38 is a schematic diagram showing an alignment state of nematic liquid crystal molecules in a nematic liquid crystal layer which constitutes the spatial light modulation element shown in FIG. 37.

FIG. 39 is a schematic diagram showing an example of light projection operation of the right-eye image and the left-eye image of the right-eye image enlargement / projection display and the left-eye image enlargement / projection display shown in FIG. 35.

[Explanation of symbols]

1 Projection-type stereoscopic image display system 2 Screen 3 Polarizing glasses 4 Image magnifying projection display 5 Polarizing plate for right eye 6 Polarizing plate for left eye 7 Light source section (visible light source section) 8 Optical path separation / synthesis section 9 Projection optical section 10 P Polarization modulation optical section (right eye polarization modulation optical section) 11 S polarization modulation optical section (left eye polarization modulation optical section) 12 light source 13 infrared light cut filter 14 ultraviolet light cut filter 15 lens 16 polarization beam splitter 17 lens 21 CRT (right eye image display, left eye image display) 22 lens 23 spatial light modulator 25 first transparent substrate 26 first transparent electrode 27 photoconductive layer 28 light absorption layer 29 dielectric multilayer film mirror 30 light modulation Layer 31 Second transparent electrode 32 First antireflection film 33 Second transparent substrate 34 Second antireflection film 35 AC power supply 37 Liquid crystal 38 Transparent resin 36 Liquid Crystal / resin composite 130 Projection-type stereoscopic image display system 131 Screen 132 Polarizing glasses 133 Image magnifying projection display 134 Polarizing plate for right eye 135 Polarizing plate for left eye 136 Light source section (white light source section) 137 Optical path separation / synthesis section 138 Projection optics 139B Blue P polarization modulation optics (right eye RGB polarization modulation optics) 139G Green P polarization modulation optics (right eye RGB polarization modulation optics) 139R Red P polarization modulation optics (right eye RGB polarizations optics) Modulation optical part) 140B Blue S polarization modulation optical part (RGB polarization modulation optical part for the left eye) 140G Green S polarization modulation optical part (RGB polarization modulation optical part for the left eye) 140R Red S polarization modulation optical part (RGB for the left eye) Polarization modulation optical unit) 141 light source 142 infrared light cut filter 143 ultraviolet light cut filter 144 lens 145 polarized light Beam Splitter 146B Blue Dichroic Mirror 146G Green Dichroic Mirror 147B Blue Dichroic Mirror 147G Green Dichroic Mirror 148 Lens 152RB CRT (Right Eye Image Display) 154RB Blue Spatial Light Modulator (153RB) 153R Lens CRT (right eye image display) 154RG Blue spatial light modulation element (spatial light modulation element) 153RG lens 152RR CRT (right eye image display) 154RR Blue spatial light modulation element (spatial light modulation element) 153RR lens 152LB CRT 154LB Blue spatial light modulator (spatial light modulator) 153LB Lens 152LG CRT 154LG Blue spatial light modulator (spatial modulator) 153LG Re Lens 152LR CRT 154LR Blue spatial light modulator (spatial light modulator) 153LR Lens

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Office reference number FI technical display location H04N 5/74 H04N 5/74 K

Claims (24)

[Claims] 1. A visible light source for generating visible light, at least an image display for the right eye displaying an image for the right eye to be displayed, and a display on one side of the image display for the right eye. A spatial light modulation that receives the right-eye image and modulates the light incident on the other surface side with this right-eye image, and then outputs the right-eye image obtained by this modulation operation from the other surface side. When a P-polarized light that has an element and the electric field of light is biased in the plane of incidence or an S-polarized light in which the electric field of light is biased perpendicularly to the plane of incidence is modulated, it is modulated by the right eye. Right-eye polarization-modulating optics that emits a left-eye image, at least a left-eye image display that displays a left-eye image to be displayed, and a left side that is displayed on the left-eye image display on one surface side. Receives the image for the eye and modulates the light incident on the other side with this image for the left eye After that, a spatial light modulator for emitting the image for the left eye obtained by this modulation operation from the other surface side is provided, and when either P-polarized light or S-polarized light is incident, this is modulated. A polarization modulation optical unit for the left eye that emits an image for the left eye, and a polarization modulation optical unit for the right eye that captures visible light obtained by the visible light source unit and separates it into P polarized light and S polarized light. And the left eye polarization modulation optical section while respectively entering the right eye polarization modulation optical section and the left eye polarization modulation optical section respectively emitted from the right eye image and the left eye image having different polarization directions Optical path separation that captures the image for the eye and combines and outputs the image for the right eye and the image for the left eye
The combining unit, the projection optical unit that magnifies and projects the right-eye image and the left-eye image from the optical path separation / composition unit, and the polarization directions of the right-eye image and the left-eye image emitted from the projection optical unit. While holding, a screen for reflecting or transmitting, and polarizing glasses for guiding the image for the right eye and the image for the left eye having different polarization directions reflected or transmitted by the screen to the right eye and the left eye of the observer, respectively. A projection-type three-dimensional image display system, characterized by being provided with. 2. A white light source unit that emits white light and at least a blue (B) image for the right eye, a green (G) image for the right eye, and a red (R) image for the right eye, which are display targets, respectively. Each of the three right-eye image displays to display, the right-eye R image, the right-eye G image, and the right-eye B image displayed on each of the right-eye image displays on one surface side, respectively, and these The R light for the right eye, the G image for the right eye, the R image for the right eye, the R light for G, and the B light incident on the other surface side are respectively modulated, and then the R for the right eye obtained by this modulation operation An image, a G image for the right eye, and a B image for the right eye each having three spatial light modulators for emitting from the other surface side, and when either P polarized RGB light or S polarized RGB light is incident. , Modulate this to RGB for the right eye
An RGB polarization modulation optical unit for the right eye that emits an image, and at least three left-eye image display devices that respectively display the R image for the left eye, the G image for the left eye, and the B image for the left eye to be displayed, The R image for the left eye, the G image for the left eye, and the B image for the left eye which are displayed on each of the left eye image display devices on one surface side are respectively received, and the R image for the left eye and the G image for the left eye are received. , R light, G light, and B light that are incident on the other surface side in the B image for the left eye are respectively modulated, and then the R image for the left eye, the G image for the left eye, and the left eye obtained by this modulation operation It has three spatial light modulators for respectively emitting the B image for use from the other surface side, and the P polarization R
RGB polarization modulation optical unit for the left eye that modulates either GB light or S-polarized RGB light to emit an RGB image for the left eye, and white light obtained by the white light source unit. And then separates it into P-polarized light and S-polarized light.
The light is separated into P-polarized RGB light and S-polarized RGB light, and the right-eye RGB polarization modulation optical unit and the left-eye RG are separated.
RGB images for the right eye, which are emitted from the RGB polarization modulation optical unit for the right eye and the RGB polarization modulation optical unit for the left eye and have different polarization directions, respectively, while being incident on the B polarization modulation optical unit. An optical path separating / combining unit that captures the RGB image for the left eye and combines and outputs the RGB image for the right eye and the RGB image for the left eye, and an RGB image for the right eye from the optical path separating / combining unit A projection optical unit that magnifies and projects the left-eye RGB image; a screen that reflects or transmits while maintaining the polarization directions of the right-eye RGB image and the left-eye RGB image emitted from the projection optical unit; Polarized glasses for guiding the RGB image for the right eye and the RGB image for the left eye, which have different polarization directions reflected or transmitted by the screen, to the right eye and the left eye of the observer, respectively. A projection-type stereoscopic image display system. 3. The projection type stereoscopic image display system according to claim 2, wherein the optical path separation / synthesis unit is a flat plate dichroic mirror, a square dichroic mirror, or an “L” dichroic mirror. Two-dimensional combination of a color separation / combination device using a PS polarization separation / combination device using any one of a flat plate polarization beam splitter, a rectangular polarization beam splitter, and an “L” -shaped polarization beam splitter. A projection-type stereoscopic image display system characterized by being configured as follows. 4. The projection type stereoscopic image display system according to claim 2, wherein the optical path separation / synthesis unit is a flat plate dichroic mirror, a square dichroic mirror, or an “L” -shaped dichroic mirror. Three-dimensionally combine a color separation / combination device using a PS polarization separation / combination device using any one of a flat polarization beam splitter, a rectangular polarization beam splitter, and an “L” -shaped polarization beam splitter. A projection-type stereoscopic image display system characterized by being configured as follows. 5. The projection-type stereoscopic image display system according to claim 2, 3, or 4, wherein the optical path separation / combination unit captures white light obtained by the white light source unit to obtain R light, G light, After being separated into B light, it is separated into P polarized light and S polarized light, and P polarized RGB
Light and S-polarized RGB light, which are made incident on the RGB polarization modulation optical section for the right eye and the RGB polarization modulation optical section for the left eye, respectively, and the RGB polarization modulation optical section for the right eye and the left eye RGB image for the right eye and R for the left eye, which have different polarization directions from each other and are emitted from the RGB polarization modulation optical unit
A projection-type three-dimensional image display system, which captures a GB image and combines and emits the RGB image for the right eye and the RGB image for the left eye. 6. The projection type stereoscopic image display system according to claim 1, wherein the optical path separation / synthesis unit is the right eye polarization modulation optical unit or the right eye. An image for the right eye or an RGB image for the right eye, which have different polarization directions and are emitted from the RGB polarization modulation optical unit and the left-eye polarization modulation optical unit or the left-eye RGB polarization modulation optical unit, and the left-eye image RGB for image or left eye
While capturing the image, the right eye image or the right eye RGB image and the left eye image or the left eye RGB image are combined into circularly polarized light in different rotation directions by a plurality of quarter wavelength devices and combined. After that, the right eye RGB of the circularly polarized light having different rotation directions reflected or transmitted by the screen is output by polarizing glasses in which a quarter wavelength plate or a quarter wavelength film is laminated on the polarizing glasses. A projection-type stereoscopic image display system, characterized in that an image and an RGB image for the left eye are converted into two linearly polarized lights orthogonal to each other and are guided to the right eye and the left eye of an observer, respectively. 7. The projection-type stereoscopic image display system according to claim 1, wherein the projection-type stereoscopic image display system is arranged between the projection optical unit and the screen,
Reflects the right-eye image and the left-eye image, or the right-eye RGB image and the left-eye RGB image emitted from the projection optical unit, and is longer than the distance between the projection optical unit and the screen. A projection-type three-dimensional image display system, which is provided with a reflection mechanism for increasing an enlargement ratio as an optical path. 8. The projection-type stereoscopic image display system according to claim 1, further comprising a right-eye input terminal that receives an input right-eye image signal. A left-eye input terminal for receiving the input left-eye image signal, and a right-eye polarization modulation optical unit for inputting the right-eye image signal input to the right-eye input terminal when displaying a stereoscopic image ,
While supplying to the RGB polarization modulation optical unit for the right eye,
The left eye image signal input to the left eye input terminal is supplied to the left eye polarization modulation optical section and the left eye RGB polarization modulation optical section, and when displaying a non-stereo image, the right eye Selecting the right eye image signal input to the input terminal for the right eye or the image signal for the left eye input to the input terminal for the left eye, the polarization modulation optical unit for the right eye, the right eye RGB polarization modulation optics for the left eye, polarization modulation optics for the left eye,
A projection type three-dimensional image display system, comprising: a switch group that supplies the RGB polarization modulation optical unit for the left eye. 9. Claims 1, 2, 3, 4, 5, 6, 7, 8
In the projection type stereoscopic image display system according to any one of the items, a spatial light modulation element that constitutes the right-eye polarization modulation optical section or the right-eye RGB polarization modulation optical section, and the left-eye polarization modulation optical section or the left eye. A projection-type stereoscopic image display system, characterized in that a spatial light modulator that constitutes an RGB polarization modulation optical unit for an eye and a polarization beam splitter that constitutes the optical path separation / synthesis unit are brought into close contact with each other. 10. The method according to claim 1, 2, 3, 4, 5, 6, 7,
9. The projection type stereoscopic image display system according to any one of 8, wherein the right-eye image display device constitutes the right-eye polarization modulation optical unit or the right-eye RGB polarization modulation optical unit, and the right-eye polarization modulation optical unit. Section or a spatial light modulation element forming an RGB polarization modulation optical section for the right eye, an image display for the left eye forming the polarization modulation optical section for the left eye or an RGB polarization modulation optical section for the left eye, and the left eye Projection stereoscopic image display system, characterized in that a spatial light modulation element forming a polarization modulation optical section for the left eye or an RGB polarization modulation optical section for the left eye and a polarization beam splitter forming the optical path separating / combining section are brought into close contact with each other. . 11. The method according to claim 1, 2, 3, 4, 5, 6, 7,
9. The projection type stereoscopic image display system according to any one of 8, wherein the right-eye image display device constitutes the right-eye polarization modulation optical unit or the right-eye RGB polarization modulation optical unit, and the right-eye polarization modulation optical unit. And an image display for the left eye that constitutes the left-side polarization modulation optical section or the left-eye RGB polarization modulation optical section while closely adhering to the spatial light modulation element that constitutes the right-eye RGB polarization modulation optical section. A projection-type stereoscopic image display system, which is brought into close contact with a spatial light modulator which constitutes the left-eye polarization modulation optical section or the left-eye RGB polarization modulation optical section. 12. The method according to claim 1, 2, 3, 4, 5, 6, 7,
The projection-type stereoscopic image display system according to any one of 8, 9, 10, and 11, wherein the right-eye image display device constitutes the right-eye polarization modulation optical section or the right-eye RGB polarization modulation optical section, and the left side. As an image display for the left eye that constitutes the polarization modulation optical section for the eye or the RGB polarization modulation optical section for the left eye, the photoconductive layer of the spatial light modulation element emits light having a spectrum sensitive to the spatial light modulation element. A projection-type stereoscopic image display system characterized by using cathode ray tubes arranged apart from each other. 13. The method according to claim 1, 2, 3, 4, 5, 6, 7,
The projection-type stereoscopic image display system according to any one of 8, 9, 10, and 11, wherein the right-eye image display device and the left-eye polarization modulation optical unit that configure the right-eye polarization modulation optical unit are configured. As an image display device for the left eye, three image display devices for the right eye forming the RGB polarization modulation optical unit for the right eye, and three image display devices for the left eye forming the RGB polarization modulation optical unit for the left eye, A refractive index matching liquid layer having a fiber plate on the image display surface and using a cathode ray tube that emits light having a spectrum sensitive to the photoconductive layer of the spatial light modulator, and having a refractive index close to that of the fiber plate. A projection-type three-dimensional image display system, characterized in that the spatial light modulator is laminated on the fiber plate via a substrate. 14. Claims 1, 2, 3, 4, 5, 6, 7,
The projection-type stereoscopic image display system according to any one of 8, 9, 10, and 11, wherein the right-eye image display device constitutes the right-eye polarization modulation optical section or the right-eye RGB polarization modulation optical section, and the left side. A projection-type stereoscopic image display system, characterized in that a liquid crystal display is used as an image display for the left eye, which constitutes the polarization modulation optical section for the eye or the RGB polarization modulation optical section for the left eye. 15. The projection-type stereoscopic image display system according to claim 14, wherein a light source that emits light having a spectrum sensitive to the photoconductive layer of the spatial light modulator is provided on the back side of each liquid crystal display. Arranged, by the light emitted from these light sources, the right eye image display constituting the right eye polarization modulation optical unit,
An image display for the left eye that constitutes the polarization modulation optical unit for the left eye, three image display devices for the right eye that configure the RGB polarization modulation optical unit for the right eye, and the RGB polarization modulation optical unit for the left eye A projection-type stereoscopic image display system, characterized in that each of the liquid crystal displays constituting the three left-eye image displays is back-illuminated. 16. The projection-type stereoscopic image display system according to claim 14, wherein the right-eye image display unit and the left-eye polarization modulation optical unit that constitute the right-eye polarization modulation optical unit. Image display device for the left eye, three image display devices for the right eye that configure the RGB polarization modulation optical unit for the right eye, and three image displays for the left eye that configure the RGB polarization modulation optical unit for the left eye As a container, a liquid crystal that has a light source that emits light having a spectrum sensitive to the photoconductive layer of the spatial light modulator and a fiber plate on the image display surface, and that is back-illuminated by the light emitted from the light source to display an image. And a display device, wherein the spatial light modulator is laminated on the fiber plate through a liquid layer for refractive index matching having a refractive index close to that of the fiber plate. Image display system. 17. The projection type stereoscopic image display system according to claim 14, wherein the liquid crystal display is a nematic liquid crystal, a cholesteric liquid crystal, a smectic liquid crystal, or a mixture of these liquid crystals. A liquid crystal display using a guest-host liquid crystal in which a dichroic dye is added to one or more selected liquid crystals, or one selected from the group consisting of a nematic liquid crystal, a cholesteric liquid crystal, a smectic liquid crystal, and a mixture of these liquid crystals. Dispersing the liquid crystal to which the dichroic dye is added in a resin having a refractive index equal to any one of ordinary refractive index, extraordinary refractive index of liquid crystal of more than one kind, and refractive index when the liquid crystal is randomly aligned. Guest-host type LCD
A liquid crystal display using a resin composite or a guest-host type liquid crystal / resin composite in which the resin is dispersed in the liquid crystal is used, and the photoconductive layer of the spatial light modulator is sensitive, and A projection type three-dimensional structure characterized in that the liquid crystal display is back-illuminated with light having a spectrum absorbed by a dichroic dye, and the transmitted light of the liquid crystal display is incident on the photoconductive layer of the spatial light modulator. Image display system. 18. The projection type stereoscopic image display system according to claim 14, 15, 16 or 17, wherein a flat light source is used as the light source for illuminating the liquid crystal display from the back. A distinctive projection-type stereoscopic image display system. 19. The projection type stereoscopic image display system according to claim 18, wherein the light source formed in a flat plate shape is a discharge lamp, a concave mirror arranged on the back surface of the discharge lamp, and a front surface of the discharge lamp. And a diffusion plate that diffuses and transmits the light emitted from the discharge lamp and the light reflected by the concave mirror directly. 20. The projection type stereoscopic image display system according to claim 18, wherein the light source formed in the flat plate shape is disposed on a reflection plate formed in the flat plate shape and one side portion on the front surface side of the reflection plate. Disposed on the front side of the discharge lamp so as to face the reflection plate, and directly diffuses and transmits the light emitted from the discharge lamp and the light reflected by the reflection plate. A projection-type three-dimensional image display system, which is configured by a diffusing plate. 21. The projection type stereoscopic image display system according to claim 18, wherein the light source formed in a flat plate shape is formed in a flat plate shape, and is composed of an EL light emitting layer which emits light when an electric field is applied. A projection type stereoscopic image display system characterized by the above. 22. Claims 1, 2, 3, 4, 5, 6, 7,
8, 9, 10, 11, 12, 13, 14, 15, 16,
In the projection type stereoscopic image display system according to any one of 17, 18, 19, 20, and 21, the spatial light modulation element is made of a nematic liquid crystal, a cholesteric liquid crystal, a smectic liquid crystal, or a mixture of these liquid crystals as a light modulation layer. A projection-type stereoscopic image display system characterized by using one or more kinds of liquid crystal selected from the group consisting of: 23. Claims 1, 2, 3, 4, 5, 6, 7,
8, 9, 10, 11, 12, 13, 14, 15, 16,
23. In the projection type stereoscopic image display system according to any one of 17, 18, 19, 20, 21, and 22, the spatial light modulator is laminated on a substrate made of glass or a fiber plate and the substrate. A first transparent electrode, a photoconductive layer laminated on the first transparent electrode, a light absorbing layer laminated on the photoconductive layer, and a dielectric multilayer mirror laminated on the light absorbing layer. When the incident light is P-polarized light according to the light intensity of the optical image which is laminated on the dielectric multilayer mirror and is input to the photoconductive layer, it is converted from P-polarized light to S-polarized light. And an optical modulation layer that, when the incident light is S-polarized light, converts it into light having an arbitrary polarization state from S-polarized light to P-polarized light. , A second transparent electrode laminated on the light modulation layer When the input light image incident through the substrate is written in the photoconductive layer and the light incident on the side of the second transparent electrode is P polarized light, this is arbitrary from P polarized light to S polarized light. When the incident light is S-polarized light, it is converted into light having an arbitrary polarization state from S-polarized light to P-polarized light, and the second transparent electrode side A projection-type stereoscopic image display system characterized in that the light is emitted from the. 24. Claims 1, 2, 3, 4, 5, 6, 7,
8, 9, 10, 11, 12, 13, 14, 15, 16,
The projection type stereoscopic image display system according to any one of 17, 18, 19, 20, 21, 22, and 23, wherein the right-eye polarization modulation optical unit, the left-eye polarization modulation optical unit, and the right-eye RGB are used. Polarization modulation optical unit, RG for the left eye
Of the optical elements forming the B-polarization modulation optical section and the optical elements of the optical separation / synthesis section, among the surfaces in contact with air,
A projection-type stereoscopic image display system comprising an antireflection film laminated on all surfaces or a part of the surfaces.