JP2014115555A - Projector device and image display system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compact projector device capable of projecting polarization separation-based stereoscopic images.SOLUTION: A projector device 1 of the present invention includes a light source unit 10, an image light generator unit 20, projection lenses 30, a first phase difference unit 40, and a second phase difference unit 50. The first phase difference unit 40 includes first phase difference inducing sections 40a which shift phases of portions of first and second image light to induce phase difference, and first phase difference non-inducing sections 40b which do not induce a phase difference. The second phase difference unit 50 includes second phase difference inducing sections 50a which shift the phases of the phase-shifted portion of the first image light and a remaining phase-unshifted portion of the second image light to induce phase difference, and a second phase difference non-inducing sections 50b which do not shift phases of the remaining phase-unshifted portion of the first image light and the phase-shifted portion of the second image light.

Description

  The present invention relates to a projector device and an image display system.

  Conventionally, a three-dimensional image display system that three-dimensionally displays a display image as a three-dimensional image has been proposed. As such an image display system, there is a polarization-separation type projector device in which pixels are allocated alternately to the right eye and the left eye alternately in a vertical or horizontal row, and each has a different polarization characteristic and is stereoscopically viewed with polarized glasses. It is known (see, for example, Patent Document 1).

JP 2009-151151 A

  However, in the above-described prior art, an intermediate image is formed once after image modulation, and a structure in which a phase difference plate that alternately gives different polarization characteristics to each pixel is passed therethrough is used to generate an intermediate image. There is a problem that a space for arranging the optical system is required and the apparatus is enlarged.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a projector device and an image display system that are small and capable of displaying a stereoscopic image by a polarization separation method.

In order to solve the above problem, a projector device according to a first aspect of the present invention includes a light source device,
The light emitted from the light source device is modulated based on image data to generate image light including first pixel light and second pixel light, and emitted from the image light generation unit. A projection lens that projects the image light onto a screen, and a first phase difference unit that is disposed between the image light generation unit and the projection lens and that imparts a phase difference to at least a part of the image light; A second phase difference unit that is disposed between the first phase difference unit and the projection lens and that imparts the phase difference to at least a part of the image light that has passed through the first phase difference unit; The first phase difference unit includes: a first phase difference providing unit that applies the phase difference to a part of each of the first pixel light and the second pixel light; and Of the pixel light and the second pixel light A first phase difference non-giving part that does not give the phase difference to the first part, and the second phase difference unit is passed through the first phase difference giving part and the phase difference is given. The phase difference is applied to the part of the first pixel light and the remaining part of the second pixel light that has passed through the first phase difference non-applying unit and has not been provided with the phase difference. A second phase difference providing unit; and the remaining portion of the first pixel light that has passed through the first phase difference non-applying unit and has not been provided with the phase difference; and the first phase difference providing unit And a second phase difference non-applying unit that does not apply the phase difference to the part of the second pixel light to which the phase difference is applied.

In this aspect, for example, if the first and second phase difference providing units give a half-wave phase difference to the image light, the first and second phase difference units have passed through the first phase difference unit. It is possible to rotate the polarization direction of the second pixel light by 90 degrees without changing the polarization direction of the pixel light.
Therefore, the image light emitted from the image light generation unit can be separated on the screen based on the polarization component. Further, the use of two phase difference units eliminates the need for an optical system for generating an intermediate image as in the prior art, thereby reducing the size of the apparatus.
Therefore, for example, when a viewer wears polarized separation type ornamental spectacles, a small-sized projector device capable of performing polarization separation type stereoscopic image display can be provided.

Each of the first phase difference providing unit and the second phase difference providing unit may be configured by a half-wave plate.
According to this configuration, the first phase difference unit and the second phase difference unit can be made to function as an aspect capable of making the polarization directions of the first pixel light and the second pixel light different by 90 degrees. .

In the first phase difference unit, a plurality of the first phase difference providing units and a first phase difference non-applying unit are alternately arranged in a stripe pattern, and the second phase difference unit includes a plurality of phase difference units. The second phase difference applying unit and the second phase difference non-applying unit may be alternately arranged in a striped pattern.
According to this configuration, it is possible to separate the image light in which the first pixel light and the second pixel light are arranged in stripes based on the polarization.

The first pixel light may constitute the image light for the right eye, and the second pixel light may constitute the image light for the left eye.
According to this configuration, for example, when the viewer wears ornamental glasses, the first and second pixel lights are separated by the difference in polarization, and different images can be seen by the right eye and the left eye, respectively. Therefore, it is possible to visually recognize a stereoscopic image by human visual characteristics.

The image light generation unit includes a plurality of modulation devices that modulate light emitted from a light source device based on image data, and an image combination unit that combines the plurality of lights modulated by the modulation device to generate the image light. And a polarization rotator that rotates polarized light with respect to a predetermined wavelength band in the image light combined by the image combining unit.
According to this configuration, even when the polarization directions of the plurality of lights generated by the image synthesis unit are different, the polarization directions can be made uniform by passing the polarization rotator. Therefore, it is possible to project image light having the same polarization direction onto the screen via the projection lens.

The first phase difference unit may be supported by the image light generation unit.
According to this configuration, since the configuration in which the first phase difference unit is supported by the image light generation unit is adopted, it is not necessary to separately provide a support member for the first phase difference unit, and components for configuring the apparatus The score can be reduced.

The first phase difference unit may be supported by the polarization rotator.
According to this configuration, since the first phase difference unit is supported by the polarization rotator, the number of parts can be reduced.

It is good also as a structure further equipped with the quarter wavelength plate arrange | positioned between the said 2nd phase difference unit and the said projection lens.
According to this configuration, for example, the first and second pixel lights can be converted from linearly polarized light whose polarization directions are shifted by 90 degrees into circularly polarized light having different rotation directions by the quarter wavelength plate. Therefore, a projector device capable of 3D display using a method of separating circularly polarized light based on a difference in rotation direction is provided.

  An image display system according to a second aspect of the present invention includes a projector device according to the first aspect, a screen on which the image light is projected via the projection lens of the projector device, a right-eye filter, Either one of the left eye side filters has a transmission characteristic to transmit the first pixel light that has passed through the first phase difference unit and the second phase difference unit, and the right eye side filter and the left eye filter One of the eye-side filters includes glasses having transmission characteristics that transmit the second pixel light that has passed through the first phase difference unit and the second phase difference unit.

  According to the image display system according to this aspect, the viewer can separate the image light on the screen by the difference in polarization of the first and second pixel lights by wearing glasses. Therefore, the viewer can see different images with the right eye and the left eye, and can visually recognize a stereoscopic image by human visual characteristics.

1 is a diagram showing a schematic configuration of an image display system according to an embodiment. The figure which shows the conceptual diagram of image light. (A) is a top view which shows schematic structure of a 1st phase difference unit, (b) is a top view which shows schematic structure of a 2nd phase difference unit. Conceptual diagram showing polarization transmission axis of ornamental glasses Sectional drawing in the principal part structure of a projector apparatus. The figure which shows schematic structure of the image display system which concerns on a modification.

  Embodiments of the present invention will be described below with reference to the drawings. This embodiment shows one aspect of the present invention, and does not limit the present invention, and can be arbitrarily changed within the scope of the technical idea of the present invention. Moreover, in the following drawings, in order to make each structure easy to understand, an actual structure and a scale, a number, and the like in each structure are different.

  FIG. 1 is a diagram illustrating a schematic configuration of an image display system 100 according to the present embodiment. The image display system 100 includes a projector device 1, a screen SC, and ornamental glasses 2. The image display system 100 uses the projector device 1 to separate the image light obtained by projecting the right-eye image and the left-eye image having different polarization directions onto the screen SC by using the ornamental glasses 2, thereby allowing the viewer to see the image light. This is a system that makes it possible to view a three-dimensional image.

  The projector device 1 forms an image according to image data supplied from a signal source such as a DVD player or a PC, and projects the formed image on the screen SC. The projector device 1 can switch between a normal image display mode that represents an image two-dimensionally and a 3D mode that represents an image three-dimensionally. In the stereoscopic image display mode, the projector device 1 is supplied with image data including information on a pair of parallax images in consideration of parallax between the left and right eyes, and projects a parallax image according to the image data. In the present embodiment, the projector apparatus 1 simultaneously projects right-eye images and left-eye images having different polarization directions on the screen SC. The viewer can view the three-dimensional image by separating the right-eye image and the left-eye image on the screen SC by using the viewing glasses 2.

  The projector device 1 is a so-called three-plate projector using three liquid crystal light valves. Specifically, the projector device 1 includes a light source device 10, an image light generation unit 20, a projection lens 30, a first phase difference unit 40, and a second phase difference unit 50.

  The light source device 10 includes a lamp 11 such as a metal halide, a reflector 12 that reflects light from the lamp 11, and a polarization conversion element 13 that converts non-polarized light from the reflector 12 into one kind of linearly polarized light. The polarization conversion element 13 includes a polarization separation film, a reflection film, and a λ / 2 retardation plate (not shown). The light from the reflector 12 is separated into two types of linearly polarized light by the polarization separation film, and 2 separated by the reflection film. The traveling direction of the different types of linearly polarized light is aligned, and one of the two types of linearly polarized light is converted into the other polarization direction by the λ / 2 phase difference plate. In the present embodiment, the polarization conversion element 13 converts the non-polarized light from the reflector 12 into linearly polarized light in the vertical direction (direction perpendicular to the paper surface of FIG. 1) and emits it. Although not shown, a pair of lens arrays that divide and condense light from the light source device 10 into a plurality of partial light beams, a red liquid crystal light valve 26R that will be described later, and a green liquid crystal light. The condenser lens is superimposed on the bulb 26G and the blue liquid crystal light valve 26B. The red liquid crystal light valve 26R, the green liquid crystal light valve 26G, and the blue liquid crystal light valve 26B are illuminated with a light beam having a uniform in-plane illuminance. The

  The image light generation unit 20 includes a reflection mirror 21, a dichroic mirror 22, a relay lens 23, a relay lens 24, a relay lens 25, a red liquid crystal light valve 26R, a green liquid crystal light valve 26G, and a blue light. A liquid crystal light valve 26B, a cross dichroic prism 27, and a polarization rotator 29 are provided.

  The dichroic mirror 22 at the front stage of the optical path transmits red light of white light from the light source device 10 and reflects blue light and green light. The transmitted red light is reflected by the reflection mirror 21 and enters the red liquid crystal light valve 26R. The red liquid crystal light valve 26R is controlled by a liquid crystal driving unit (not shown) so as to modulate the red light based on the R (Red) component of the image data. The red liquid crystal light valve 26R includes a λ / 2 retardation plate, an incident side polarizing plate, a liquid crystal panel, and an output side polarizing plate (not shown). The light from the reflection mirror 21 is converted into linearly polarized light in the horizontal direction (direction parallel to the paper surface of FIG. 1) by the λ / 2 phase difference plate, and the liquid crystal is transmitted through the incident side polarizing plate that transmits the linearly polarized light in the horizontal direction. Incident on the panel. The light incident on the liquid crystal panel is modulated according to image data corresponding to red light, and only the light of the polarization component in the vertical direction (hereinafter referred to as S-polarized light) among the modulated light by the output side polarizing plate. Is emitted to the cross dichroic prism 27.

  On the other hand, of the colored light reflected by the dichroic mirror 22 in the preceding stage of the optical path, the green light is reflected by the dichroic mirror 22 in the preceding stage of the optical path that reflects the green light, and enters the green liquid crystal light valve 26G. The green liquid crystal light valve 26G is controlled by a liquid crystal driving unit (not shown) so as to modulate green light based on the G (Green) component of the image data. The green liquid crystal light valve 26G includes an incident side polarizing plate, a liquid crystal panel, and an output side polarizing plate (not shown). The light from the dichroic mirror 22 at the front stage of the optical path enters the liquid crystal panel via an incident side polarizing plate that transmits linearly polarized light in the vertical direction. The light incident on the liquid crystal panel is modulated according to the image data corresponding to the green light, and of the modulated light, only the light of the polarization component in the horizontal direction (hereinafter referred to as P-polarized light) by the output side polarizing plate. Is emitted to the cross dichroic prism 27.

On the other hand, blue light also passes through the dichroic mirror 22 in the preceding stage of the optical path. For blue light, in order to compensate that the optical path length is different from that of green light and red light, a light guide composed of a relay lens system including a relay lens 23 that is an incident lens, a relay lens 24, and a relay lens 25 that is an output lens. A light means 28 is provided. Blue light is incident on the blue liquid crystal light valve 26B via the light guide means 28. The blue liquid crystal light valve 26B is controlled by a liquid crystal driving unit (not shown) so as to modulate blue light based on the B (Blue) component of the image data. The blue liquid crystal light valve 26B includes a λ / 2 retardation plate, an incident side polarizing plate, a liquid crystal panel, and an output side polarizing plate (not shown). The light from the relay lens 25 is converted into linearly polarized light in the horizontal direction (direction parallel to the paper surface of FIG. 1) by the λ / 2 phase difference plate, and the liquid crystal is transmitted through the incident-side polarizing plate that transmits the horizontal linearly polarized light. Incident on the panel. The light incident on the liquid crystal panel is modulated according to the image data corresponding to the blue light. Of the modulated light, only the light having the polarization component in the vertical direction (S-polarized light) by the output side polarizing plate is the cross dichroic prism. 27 is emitted.
As described above, in the present embodiment, so-called SPS synthesis is performed in which green light is P-polarized light and red light and blue light are S-polarized light, thereby efficiently performing photosynthesis.

  Each of the three color lights modulated by the red liquid crystal light valve 26R, the green liquid crystal light valve 26G, and the blue liquid crystal light valve 26B is incident on the cross dichroic prism 27. The cross dichroic prism 27 has four right-angle prisms bonded together, and a dielectric multilayer film that reflects red light and a dielectric multilayer film that reflects blue light are formed in a cross shape on the inner surface thereof. These dielectric multilayer films combine the three color lights to form light (image light) representing a color image. A field lens can be provided on the incident side of each of the red liquid crystal light valve 26R, the green liquid crystal light valve 26G, and the blue liquid crystal light valve 26B.

The light synthesized by the cross dichroic prism 27 enters a polarization rotator 29 provided on the exit surface. The polarization rotator 29 is an element that rotates the polarization of light of a selected predetermined wavelength band.
The polarization rotator 29 converts green light of incident light from P-polarized light to S-polarized light, and passes blue light and red light as they are as S-polarized light. As a result, all of the image light composed of the respective color lights that have passed through the polarization rotator 29 is aligned with S-polarized light (light of a polarization component in the vertical direction).

FIG. 2 is a conceptual diagram of the image light G. In FIG. 2, the vertical direction in the figure is referred to as the Y direction, and the horizontal direction in the figure is referred to as the X direction.
The image light G includes a plurality of pixel lights. Specifically, the image light G, as shown in FIG. 2, the right-eye pixels light corresponding to the right eye (a first pixel light) and G _R, the left-eye pixels light corresponding to the left eye (second Pixel light) _GL . Right eye pixels light G _R and the left-eye pixels light G _L is composed of the same size is, for example, the pixel pitch is set to 8.5 .mu.m.

Right eye pixels light G _R is red liquid crystal light valve 26R, the green liquid crystal light valve 26G, the blue liquid crystal light valves 26B, is the light from the pixel for modulating light based on image data for the right eye .
The left-eye pixel light _GL is light from a pixel that modulates light based on image data for the left eye in the red liquid crystal light valve 26R, the green liquid crystal light valve 26G, and the blue liquid crystal light valve 26B. .
When the light from the red liquid crystal light valve 26R, the green liquid crystal light valve 26G, and the blue liquid crystal light valve 26B is combined by the cross dichroic prism 27 and the optical path is drawn in a straight line, the red liquid crystal light valve 26R The corresponding pixels of the green liquid crystal light valve 26G and the blue liquid crystal light valve 26B are in the same position in the optical path.
Right eye pixels light G _R is the light visible only to the right eye of the viewer by passing through the right eye filter 2a ornamental glasses 2. On the other hand, the left-eye pixel light _GL is light that is visible only to the left eye of the observer by passing through the left-eye filter 2 b of the ornamental glasses 2.

Image light G is a right-eye pixel unit G1 having a plurality arranged in a line of pixels for the right eye pixel light G _R is emitted along the Y direction in the drawing, the pixel light G _L is the left-eye And a left-eye pixel portion G2 in which a plurality of emitted pixels are arranged in a line. The right-eye pixel portion G1 and the left-eye pixel portion G2 each have a rectangular shape as shown in FIG. The right-eye pixel unit G1 and the left-eye pixel unit G2 are alternately arranged along a direction (X direction in the figure) orthogonal to the arrangement direction of the pixel lights.

  The image light whose polarization direction is aligned in the same direction by the polarization rotator 29 passes through the first phase difference unit 40 and the second phase difference unit 50 and is projected on the screen SC by the projection lens 30. The first phase difference unit 40 is disposed between the image light generation unit 20 and the projection lens 30 and is for giving a phase difference to at least a part of the image light G. The second phase difference unit 50 is disposed between the first phase difference unit 40 and the projection lens 30 and imparts a phase difference to at least a part of the image light G that has passed through the first phase difference unit 40. Is for.

  In the present embodiment, the first phase difference unit 40 is directly supported on the polarization rotator 29. That is, in this embodiment, the polarization rotator 29 also serves as a support member for the first phase difference unit 40. Thereby, the number of parts of the projector apparatus 1 is reduced, and cost reduction is aimed at.

  FIG. 3A is a plan view showing a schematic configuration of the first phase difference unit 40, and FIG. 3B is a plan view showing a schematic configuration of the second phase difference unit 50. In FIG. 3, the shape of each unit will be described using a coordinate system (XY plane) common to FIG.

As shown in FIG. 3A, the first phase difference unit 40 includes a phase difference providing unit 40a (first phase difference providing unit) and a phase difference non-applying unit (first phase difference non-applying unit). 40b. Each of the phase difference providing unit 40a and the phase difference non-applying unit 40b is formed in a rectangular shape having a long side along the Y direction and a short side along the X direction.
Phase difference providing section 40a is a phase difference given to each part of the right-eye pixel light G _R and the left-eye pixels light G _L in the image light G. Phase difference non imparting portion 40b does not impart a phase difference to each of the remaining portions of the right-eye pixel light G _R and the left-eye pixels light G _L.

  The phase difference imparting unit 40a is composed of a ½ wavelength plate, imparts a ½ wavelength phase difference to part of the image light G that has passed, and rotates the polarization direction by 90 degrees. For example, the width of the short side direction of the phase difference imparting unit 40a is set to 2 μm.

  On the other hand, the phase difference non-giving part 40b is configured by a gap between the phase difference giving parts 40a. That is, the phase difference non-applying unit 40b does not apply a phase difference to the image light G that has passed through, and therefore does not rotate the polarization direction.

  In the first phase difference unit 40, a plurality of phase difference providing units 40a and phase difference non-applying units 40b are alternately arranged in a striped pattern. In the first phase difference unit 40, the phase difference applying unit 40a and the phase difference non-applying unit 40b are Y in which the longitudinal direction is the longitudinal direction of the right-eye pixel unit G1 and the left-eye pixel unit G2 in the image light G. They are arranged along the X direction so as to coincide with the direction.

As illustrated in FIG. 3B, the second phase difference unit 50 is similar to the first phase difference unit 40 in that a phase difference imparting unit 50 a (second phase difference imparting unit) and a phase difference non-giving unit. 50b (second phase difference non-giving part). The phase difference providing unit 50a and the phase difference non-applying unit 50b are each formed in a rectangular shape.
Phase difference providing section 50a is a phase difference given to each part of the first right-eye pixel light in the image light G which has passed through the phase difference unit 40 G _R and the left-eye pixels light G _L. Phase difference non imparting portion 50b does not impart a phase difference to each of the remaining portions of the right-eye pixel light G _R and the left-eye pixels light G _L.

  The phase difference imparting unit 50a is composed of a ½ wavelength plate, imparts a ½ wavelength phase difference to the passed image light G, and rotates the polarization direction by 90 degrees. For example, the width of the short side direction of the phase difference imparting unit 50a is set to 2.6 μm.

  On the other hand, the phase difference non-giving part 50b is configured by a gap between the phase difference giving parts 50a. That is, the phase difference non-applying unit 50b does not apply a phase difference to the image light G that has passed, and therefore does not rotate the polarization direction.

  Similarly to the first phase difference unit 40, the second phase difference unit 50 includes a plurality of phase difference imparting units 50a and non-phase difference imparting units 50b that are alternately arranged in a stripe pattern. In the second phase difference unit 50, the phase difference applying unit 50a and the phase difference non-applying unit 50b are Y in which the longitudinal direction is the longitudinal direction of the right-eye pixel unit G1 and the left-eye pixel unit G2 in the image light G. They are arranged along the X direction so as to coincide with the direction.

The viewer uses the ornamental glasses 2 when viewing the three-dimensional image.
FIG. 4 is a conceptual diagram showing the polarization transmission axis of the ornamental glasses 2.
As shown in FIG. 4, the ornamental glasses 2 include the image light G projected on the screen SC through the first phase difference unit 40 and the second phase difference unit 50 of the right eye side filter 2a. has a vertical direction (Y-direction) to the transmission characteristic of transmitting only the right-eye pixel light G _R is S-polarized light having the polarization direction as described below. In addition, the left-eye filter 2b passes through the first phase difference unit 40 and the second phase difference unit 50, and out of the image light G projected on the screen SC, the polarization direction in the left-right direction (X direction). It has a transmission characteristic to transmit the pixel light _GL for the left eye that is P-polarized light having

Subsequently, the operation of the image display system 100 according to the present embodiment will be described. Hereinafter, a case where the image display system 100 causes a viewer to visually recognize a three-dimensional image will be described as an example.
The image display system 100 drives the image light generation unit 20 of the projector device 1 based on right eye and left eye image data supplied from the outside. The projector device 1 controls driving of the liquid crystal light valves 26R, 26G, and 26B by a liquid crystal driving unit (not shown) so as to modulate red light, green light, and blue light based on each color component of the image data.

Thus, the image light generator 20 of the projector apparatus 1, after combining the image light G including the pixel light G _L pixel light G _R and the left eye right eye corresponding to the image data by the cross dichroic prism 27, polarizing The rotor 29 is passed. Thereby, the image light G is in a state in which the polarization directions of the respective colors are aligned in the same direction.

  Thus, the image light G emitted from the image light generation unit 20 (polarization rotator 29) is incident on the first phase difference unit 40 provided on the polarization rotator 29.

Here, a state in which the phase difference changes as the image light G passes through the first phase difference unit 40 and the second phase difference unit 50 will be described with reference to the drawings.
Figure 5 is a diagram for explaining the process of phase difference image light G is applied, FIG. 5 (a) shows the phase difference change of the right-eye pixel light G _R of the image light G FIG. 5B shows a change in phase difference for the pixel light G _L for the left eye in the image light G. 5A and 5B are cross sections along the X direction in FIGS. Incidentally, FIG. 5 (a), in the (b), the cross dichroic prism 27, polarization rotator 29, and is not shown in the projection lens 30, the pixel and the left-eye pixels for emitting the right eye pixels light G _R Only the pixels emitting the light _GL , the first phase difference unit 40, and the second phase difference unit 50 are shown. The polarization directions shown in FIGS. 5A and 5B show how the polarization state changes after being emitted from the polarization rotation element 29. Further, FIG. 5 (a), the (b), the for clarity of illustration, among the pixels for emitting a plurality of right eye pixels light G _R and the pixel light G _L for the left eye making up the image light G, and Only one piece is shown. Moreover, for clarity of explanation, one pixel light G _L pixel light G _R and the left eye right eye, in the first phase difference unit 40, respectively, the phase difference providing section 40a and the phase difference non imparting portion 40b Passed one by one. Similarly, in the second phase difference unit 50, each light passes through the phase difference providing unit 50a and the phase difference non-applying unit 50b one by one.

FIG. 5 (a), the (b), the right-eye pixels light G _R pixels for emitting the pixel light G _L pixels and the left eye for emitting (red liquid crystal light valve 26R, the green liquid crystal light valve 26G, blue The distance between the liquid crystal light valve 26B) and the first phase difference unit 40 is set to 40 mm, for example. Further, the second phase difference unit 50 is disposed by being supported by a support member (not shown) at a position separated from the first phase difference unit 40 by 12.3 mm. A transparent substrate may be provided between the first phase difference unit 40 and the second phase difference unit 50, and the second phase difference unit 50 may be supported via the transparent substrate. In this case, a transparent substrate having an optical characteristic that does not change the polarization direction of the image light G is used.

Right-eye pixel unit right-eye pixel light G _R emitted from G1, as shown in FIG. 5 (a), the thereof, which is part an upper half region A _R is the phase difference between the first phase difference unit 40 Incident into the applying portion 40a. Upper half region A of the right-eye pixel light G _R is the polarization direction by passing through the phase difference providing section 40a consisting of 1/2-wavelength plate is rotated 90 degrees, the P-polarized light.

Upper half area A _R of the first right-eye pixel light G _R which has passed through the phase difference unit 40 is incident on the phase difference imparting portion 50a of the second retardation unit 50. Phase difference imparting portion 50a is the first phase difference imparting portion 40a of the half-wave part of the right-eye pixel light G _R the phase difference is imparted in through the phase difference unit 40 (upper half region A _R ) is given a phase difference. Thus, the upper half area A _R of the right-eye pixel light G _R is the polarization direction is further rotated 90 degrees by passing through the phase difference providing section 50a, returns to S polarized light.

On the other hand, the right-eye pixel light G _R emitted from the right-eye pixel unit G1, the lower half area B _R is the remainder passes through the first phase difference non imparting portion 40b of the phase difference unit 40 . Lower half area B _R of the right-eye pixel light G _R does not change the polarization direction by passing through the phase difference non giving unit 40b, and remains S-polarized light.

Lower half area B _R of the first right-eye pixel light G _R which has passed through the phase difference unit 40 is incident to the second phase difference non imparting portion 50b of the phase difference unit 50. Phase difference non imparting section 50b, a first retardation remainder (lower half area B _R of the right-eye pixel light G _R which passes through the non-applying portion 40b phase difference has not been granted the phase difference unit 40 ) Is not given a phase difference. Thus, the lower half area B _R of the right-eye pixel light G _R, since the polarization direction by passing through the phase difference non imparting portion 50b does not change, resulting in the polarization direction remains the S-polarized light .
In this way, the right-eye pixels light G _R of the image light G, the polarization direction is S-polarized light by passing through the first phase difference unit 40 and the second phase difference unit 50,.

In contrast, as shown in FIG. 5 (b), the pixel light G _L for the left eye that is emitted from the pixel unit G2 for the left eye, its is part upper half area A _L is the first phase difference unit It is incident on the 40 phase difference providing section 40a. The upper half region A _L of the left-eye pixel light G _L passes through the phase difference providing unit 40a, so that the polarization direction is rotated by 90 degrees and becomes P-polarized light.

Upper half area A _L of the first left-eye pixel light has passed through the phase difference unit 40 G _L is incident on the second phase difference non imparting portion 50b of the phase difference unit 50. The phase difference non-applying unit 50b passes through the phase difference applying unit 40a of the first phase difference unit 40 and is positioned on a part (upper half region A _L ) of the left-eye pixel light _GL to which the phase difference has been applied. No phase difference is given. Thus, the upper half region A _L of the left-eye pixel light G _L, since the polarization direction by passing through the phase difference non imparting portion 50b does not change, and remains P-polarized.

On the other hand, in the left-eye pixel light G _L emitted from the left-eye pixel unit G2, the lower half region B _L which is the remaining part thereof is incident on the phase difference non-giving unit 40b of the first phase difference unit 40. . Lower half region B _L of the left-eye pixel light G _L does not change the polarization direction by passing through the phase difference non giving unit 40b, and remains S-polarized light.

Lower half region B _L of the first left-eye pixel light has passed through the phase difference unit 40 G _L is incident the second phase difference imparting portion 50a of the phase difference unit 50. The phase difference providing unit 50a passes through the phase difference non-applying unit 40b of the first phase difference unit 40 and the remaining part of the left-eye pixel light G _L to which no phase difference has been applied (lower half region B _L ). Is given a phase difference. Thus, the lower half region B _L of the left-eye pixel light G _L, the polarization direction is rotated 90 degrees by passing through the phase difference providing section 50a, the P-polarized light.
In this way, the left-eye pixel light _GL in the image light G passes through the first phase difference unit 40 and the second phase difference unit 50, so that the polarization direction becomes P-polarized light.

Above As mentioned, by passing through the first phase difference unit 40 and the second phase difference unit 50, the polarization direction of the right-eye pixel light G _R becomes S-polarized light, pixel light G for the left eye The polarization direction of _L is P-polarized light.

According to this embodiment, the polarization direction of the image light G, can be made different respectively between the right-eye pixel light G _R and the left eye pixel light G _L.

Including polarization directions different pixel for the right eye light G _R and the pixel light G _L for the left eye image light G it is displayed by being enlarged by the projection lens 30 onto the screen SC.

As shown in FIGS. 5A and 5B, the image light G passes through the first phase difference unit 40 and the second phase difference unit 50, so that the polarization direction is S-polarized light before passing. from uniform state, it is changed to a state where the polarization directions are different from each of the right-eye pixel light G _R and the left-eye pixels light G _L.

In the present embodiment, the viewer views the screen SC in a state where the viewing glasses 2 for visually recognizing the three-dimensional image are used. Therefore, the viewer, as shown in FIG. 4, viewing only the right-eye pixel light G _R of the image light G through the right eye filter 2a in the right eye, the left eye side filter 2b in the left eye Only the left-eye pixel light _{GL of} the image light G can be visually recognized through the. Therefore, the image display system 100, the right eye only the pixel light G _R is visually recognized configured image light G from being composed of only the pixel light G _L for the left eye in the left eye of the viewer in the right eye of the viewer The image light G can be visually recognized.
As described above, according to the present embodiment, since the polarization directions of the left-eye image light G and the right-eye image light G are different from each other, the crosstalk between the image lights G can be reduced. A stereoscopic image can be viewed by the viewer.

  The image display system 100 can naturally perform a normal image display mode in which an image is two-dimensionally expressed. In this case, image light G common to the left and right eyes is generated in the projector device 1 and projected onto the screen SC. A viewer can view a normal two-dimensional display image by viewing the screen SC without using the ornamental glasses 2.

The embodiment of the present invention has been described above with reference to the drawings. However, the specific configuration is not limited to this embodiment, and can be appropriately changed without departing from the gist of the present invention.
For example, in the above-described embodiment, the image light G synthesized by the cross dichroic prism 27 is exemplified by the case of SPS synthesis in which the polarization directions of red light, green light, and blue light are different. It is not limited to. For example, in the image light G synthesized by the cross dichroic prism 27, red light, green light, and blue light may all be aligned with one of S-polarized light and P-polarized light. In that case, the polarization rotator 29 can be omitted.
In the above embodiment, the pixel light G _R for the right eye is P polarized light, the image light G _L for the left eye and the S-polarized light, the present invention is not limited thereto. The right-eye pixel light G _R and S polarized light, the image light G _L for the left eye to the P-polarized light, the relative position between the pixel and the first phase difference unit 40 and the second phase difference unit 50 Can be changed.

  Moreover, in the said embodiment, the case where a stereoscopic image was visually recognized by the linearly polarized light separation system which isolate | separates the two linearly polarized light from which polarization direction differs 90 degree | times with the spectacles 2 was mentioned as an example. However, the stereoscopic image may be visually recognized by a circularly polarized light separation method using circularly polarized light. When such a circularly polarized light separation method is employed, a quarter wavelength plate 60 may be installed between the second phase difference unit 50 and the projection lens 30 as shown in FIG.

The image light G composed of linearly polarized light components passing through the first phase difference unit 40 and the second phase difference unit 50 and having a polarization direction different by 90 degrees changes to circularly polarized light by passing through the quarter wavelength plate 60. Can be made. For example, S-polarized light at a right-eye pixel light G _R is 1/4 changes to right-handed circularly polarized light by passing through the wave plate 60, P-polarized light pixel light G _L for the left eye is the The light passes through the quarter-wave plate 60 and changes to counterclockwise circularly polarized light.

When employing the circularly polarized light separation system, ornamental glasses 2, when viewing the image light G passing through the screen SC, right eye filter 2a is the right-eye pixel light G _R is a clockwise circularly polarized light The left eye side filter 2b has a transmission characteristic for transmitting the left eye pixel light _GL that is counterclockwise circularly polarized light. On the other hand, when viewing the image light G reflected by the screen SC has a transmission characteristic that right eye filter 2a is transmitted through the right eye pixels light G _R became counterclockwise circularly polarized light by the reflection of the screen SC The left-eye filter 2b has a transmission characteristic of transmitting the left-eye pixel light _GL that has been clockwise circularly polarized by the reflection of the screen SC.

  As described above, according to the present invention, it is possible to provide an image display system that is compatible with a method of visually recognizing a stereoscopic image by the circularly polarized light separation method by using the quarter wavelength plate 60.

  In the above-described embodiment, the so-called three-plate projector device 1 using three liquid crystal light valves has been described as an example, but the present invention is not limited to this. For example, a projector device having a single liquid crystal light valve and a color wheel and a so-called single-plate type that projects image light for the right eye and image light for the left eye on the screen SC alternately in time sequence. It may be adopted.

  In the above-described embodiment, the case where the screen SC is a part of the image display system 100 has been described as an example.

DESCRIPTION OF SYMBOLS 1 ... Projector apparatus, 2 ... Ornamental glasses, 2a ... Right eye side filter, 2b ... Left eye side filter, A _R , A _L ... Upper half area (part), _BR , B _L ... Lower half area ( (Remaining part), G ... image light, 10 ... light source device, 20 ... image light generation unit, 26B ... blue liquid crystal light valve (modulation device), 26G ... green liquid crystal light valve (modulation device), 26R ... liquid crystal light valve (Modulation device), 26R ... liquid crystal light valve for red (modulation device), 27 ... cross dichroic prism (image synthesis unit), 29 ... polarization rotator, 30 ... projection lens, 40 ... first phase difference unit, 40a ... Phase difference imparting unit (first phase difference imparting unit), 40b ... Phase difference non-giving unit (first phase difference non-giving unit), 50 ... Second phase difference unit, 50a ... Phase difference giving unit (first Phase difference imparting section), 5 b ... phase difference non imparting portion (second phase difference non applying portion), 60 ... 1/4-wave plate,
G _L ... Pixel light for left eye, G _R ... Pixel light for right eye, SC ... Screen, 100 ... Image display system

Claims (8)

A light source device;
An image light generation unit that modulates light emitted from the light source device based on image data and generates image light including first pixel light and second pixel light;
A projection lens that projects the image light emitted from the image light generation unit onto a screen;
A first phase difference unit that is disposed between the image light generation unit and the projection lens and that imparts a phase difference to at least a part of the image light;
A second phase difference unit that is disposed between the first phase difference unit and the projection lens, and that imparts the phase difference to at least a part of the image light that has passed through the first phase difference unit; With
The first phase difference unit includes:
A first phase difference providing unit that applies the phase difference to a part of each of the first pixel light and the second pixel light;
A first phase difference non-giving unit that does not give the phase difference to the remaining portions of the first pixel light and the second pixel light,
The second phase difference unit is:
The part of the first pixel light to which the phase difference is given by passing through the first phase difference providing unit, and the phase difference is given by passing through the first phase difference non-giving unit. A second phase difference providing unit that applies the phase difference to the remaining portion of the second pixel light that has not been,
The remaining portion of the first pixel light that has passed through the first phase difference non-applying unit and has not been provided with the phase difference, and the phase difference is applied through the first phase difference providing unit. A second phase difference non-applying unit that does not apply the phase difference to the part of the second pixel light that has been performed. The projector device according to claim 1, wherein each of the first phase difference providing unit and the second phase difference providing unit includes a half-wave plate. In the first phase difference unit, a plurality of the first phase difference applying units and the first phase difference non-applying units are alternately arranged in a stripe pattern,
The said 2nd phase difference unit has the said some 2nd phase difference provision part and the said 2nd phase difference non-giving part each arrange | positioned alternately at stripe shape, The Claim 1 or 2 characterized by the above-mentioned. The projector apparatus as described. The first pixel light constitutes the image light for the right eye,
The projector device according to claim 1, wherein the second pixel light constitutes the image light for the left eye. The image light generation unit includes a plurality of modulation devices that modulate light emitted from a light source device based on image data, and an image combination unit that combines the plurality of lights modulated by the modulation device to generate the image light. And a polarization rotator that rotates polarized light with respect to a predetermined wavelength band in the image light combined by the image combining unit. 5. The projector device according to claim 1, wherein: The projector device according to claim 1, wherein the first phase difference unit is supported by the polarization rotator. The projector device according to claim 1, further comprising a quarter-wave plate disposed between the second phase difference unit and the projection lens. A projector device according to any one of claims 1 to 7;
A screen on which the image light is projected via the projection lens of the projector device;
Either one of the right eye side filter and the left eye side filter has a transmission characteristic of transmitting the first pixel light that has passed through the first phase difference unit and the second phase difference unit,
Glasses having transmission characteristics that allow the other of the right-eye filter and the left-eye filter to transmit the second pixel light that has passed through the first phase difference unit and the second phase difference unit; An image display system comprising:

Images