JP2002372677A - Projection type image display and multiplexing optical system for the same - Google Patents

Projection type image display and multiplexing optical system for the same

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Publication number
JP2002372677A
JP2002372677A JP2001182218A JP2001182218A JP2002372677A JP 2002372677 A JP2002372677 A JP 2002372677A JP 2001182218 A JP2001182218 A JP 2001182218A JP 2001182218 A JP2001182218 A JP 2001182218A JP 2002372677 A JP2002372677 A JP 2002372677A
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Japan
Prior art keywords
light
optical system
light emitting
plurality
element
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Pending
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JP2001182218A
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Japanese (ja)
Inventor
Toshiyuki Iguchi
Shinji Tezuka
敏之 井口
伸治 手塚
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Ricoh Co Ltd
株式会社リコー
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Priority to JP2001182218A priority Critical patent/JP2002372677A/en
Publication of JP2002372677A publication Critical patent/JP2002372677A/en
Pending legal-status Critical Current

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Abstract

PROBLEM TO BE SOLVED: To provide a large sized display for realizing a high quality and bright image and miniaturization of the display by using a light source in which LDs(laser diodes) and LEDs(light emitting diodes) are densely integrated in an array, and to provide an optical system used for the display. SOLUTION: A multiplexing optical system is composed of a plurality of light emitting elements disposed in an array of projection type image display, a plurality of lens arrays which correspond to respective light emitting elements and covert the light outputted from respective light emitting elements into luminous fluxes coming from infinity and an optical element which commonly converts respective outputted light into finite luminous fluxes. The light emitted from numerous integrated light emitting elements is converted into a luminous flux coming from infinity with lenses of a lens array corresponding to the respective light emitting elements, and all luminous fluxes are commonly converted into a finite luminous flux with the optical element and converged onto a single point, thus a sufficient luminosity is available on the focal point despite that the output of each light emitting element is weak and a bright color image is projected onto a screen or the like.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a projection type display device for displaying a color image by scanning and illuminating an image display surface such as a screen with three primary colors of R, G and B. It can be used for screen displays, high-resolution displays, and the like.

[0002]

2. Description of the Related Art As a conventional projection type image display apparatus, there is a conventional projection type image display apparatus which projects and displays an image by intercepting or modulating the amplitude of a laser beam while two-dimensionally scanning one laser beam. JP-A-4-51011),
Also, using a Nd: YAG laser as a light source, red (R), green (G), and blue (B) light are respectively generated by a wavelength conversion element, and each light is formed through a spatial modulator to form an image.
There is a projector that projects the image on a screen using a projection lens (Japanese Patent Laid-Open No. Hei 10-293268). Further, the main components of a conventional large-screen display device are as follows: (a) A two-dimensional image is formed by a spatial modulator provided between a light source typified by a liquid crystal projector and a display medium such as a screen. (B) a system in which a screen, which is a display medium represented by a plasma display panel, is composed of display pixel cells, and a display is performed by directly driving them; (C)
There is a method of performing display by two-dimensionally scanning output light from a laser light source.

In the method (a), there is a problem that the brightness of an image obtained by enlarging and projecting an image formed by the spatial modulator is insufficient. Also,
In order to increase the brightness, the brightness of the light source used must be increased. However, this causes a remarkable temperature rise in the entire device, particularly in a spatial modulator in which light is condensed, and there is a problem in its heat resistance. The method (b) has a problem that power consumption is large. Further, as a common problem of (a) and (b), there is a problem that the resolution is reduced when the image size is increased. In the method of two-dimensionally scanning the laser light of (c) with respect to the above (a) and (b), by changing the modulation period of the light source during scanning, the image size can be reduced without sacrificing the resolution. , That is, the display area can be widened. However, when a color image is to be displayed in the above method (c), three types of large-sized lasers are conventionally prepared and synthesized by synthesizing those lights, so that the device size becomes large. In particular, there is a problem that it cannot be applied to a rear projection type display device.

[0004]

SUMMARY OF THE INVENTION In view of the above, the present invention provides a large-screen display device capable of realizing high image quality, high brightness, and miniaturization using a light source in which LDs and LEDs are highly integrated in an array. And an optical system used for the same.

[0005]

[Measures taken to solve the problem]

According to a first aspect of the present invention, there is provided a projection type image display apparatus comprising: a plurality of light emitting elements arranged in an array; and output light from each light emitting element. That is, a multiplexing optical system is constituted by a plurality of lens arrays corresponding to the respective light emitting elements that convert light beams from infinity into light beams and optical elements that commonly convert the output light of each of them into a finite light beam.

[Function] The light from a large number of light-emitting elements is converted into a light flux from infinity by a lens of a corresponding lens array, and all of them are converted into a finite light flux by an optical element and concentrated at one point. Therefore, although the output of each light-emitting element is weak, sufficient brightness can be obtained at the focal point, and a bright color image can be projected on a screen or the like.

[0006]

According to a second aspect of the present invention, there is provided a multiplexing optical system according to the first aspect, that is, a plurality of light emitting elements arranged in an array and output light from each light emitting element from infinity. For a multiplexing optical system composed of a plurality of lens arrays corresponding to the respective light emitting elements for converting the light beams into the luminous fluxes and the optical elements for commonly converting the respective output lights into finite luminous fluxes, the respective light emitting elements are denoted by R, G, and R. This is a combination of the three color light emitting elements B.

In order to have a plurality of light sources of R, G, and B, which are three primary colors of light, each of the light sources is independently turned ON / OFF or continuously modulates the luminance, so that each of the R, G, and B light sources is modulated. Since the amount of light can be finely controlled, and as a result, a wide range of color gradations can be expressed at drawing points obtained on a screen or the like, a high-quality color image with excellent gradation expression can be displayed. .

[0007]

According to a third aspect of the present invention, there is provided a multiplexing optical system according to the second aspect, that is, a plurality of light emitting elements arranged in a lens array and an output light from each light emitting element being infinite. A multiplexing optical system comprising a plurality of lens arrays corresponding to each light emitting element for converting a light beam from a distance and an optical element for commonly converting each output light into a finite light beam. An optical system composed of a combination of G and B three-color light-emitting elements is characterized in that the three-color light-emitting elements are composed of semiconductor lasers.

Since a semiconductor laser is used as the light source, a plurality of light sources can be integrated at a high density, and the size of the light source array surface can be reduced. In addition, since the light source and the light source drive circuit can be manufactured on the same wafer or substrate in the light source thickness direction perpendicular to the surface, the thickness can be reduced, and the overall size of the device can be reduced. can do. In particular, the rear projection device can be housed in the same housing as the screen.

[0008]

According to a fourth aspect of the present invention, there is provided a multiplexing optical system according to the second aspect, that is, a plurality of light emitting elements arranged in an array and an output light from each light emitting element from infinity. A multiplexing optical system comprising a plurality of lens arrays corresponding to the respective light emitting elements for converting the light beams into a plurality of light beams and an optical element for commonly converting the output light thereof into a finite light beam. , And B, the three-color light-emitting element is configured by an LED light source.

[0009]

According to a fifth aspect of the present invention, in the multiplexing optical system according to the second to fourth aspects, the ratio is inversely proportional to the single output of each of the R, G, and B light emitting elements. Means that the number of light emitting elements of each color is arranged.

The outputs (light quantities) of the R, G, and B light sources are different at present. In consideration of this difference, the number of light-emitting elements of each color is arranged at a ratio inversely proportional to the output of the single light source. Since the color image can be eliminated, a well-balanced color image can be displayed.

[0010]

According to a sixth aspect of the present invention, in the multiplexing optical system, a plurality of the light emitting elements are arranged one-dimensionally at a ratio inversely proportional to a single output of a light emitting element of each color. The lens array is arranged one-dimensionally so as to correspond to these light sources.

[0011]

According to a seventh aspect of the present invention, in the multiplexing optical system, a plurality of the light emitting elements are two-dimensionally arranged at a ratio inversely proportional to a single output of a light emitting element of each color. The lens array is two-dimensionally arranged to correspond to these light sources.

[0012]

The light emitting device includes a plurality of light emitting elements arranged in the two-dimensional array and a plurality of lens arrays for converting output light from each light emitting element into a light flux from infinity. For a multiplexing optical system consisting of optical elements that commonly convert each output light into a finite light flux, a blue light source in the center area of the two-dimensional array light emitting element, a green light source on the outer periphery, It is to arrange a red light source.

The refraction angle of light varies depending on its wavelength. Specifically, the shorter the wavelength, the greater the refraction angle. Therefore, when the light passes through the same spherical lens, the colors R, G, and B are arranged in the order of shorter wavelength, ie, B , G, and R in this order, the focus is focused on a position closer to the lens (this is generally called chromatic aberration). On the other hand, when light of the same wavelength is incident on a spherical lens, it is focused on a position closer to the lens as the distance from the central axis of the lens increases (this is generally called spherical aberration). In consideration of these, in the present solution, since the light of long wavelength R is disposed so as to pass through a portion far from the center of the lens, the effect that the focal position approaches the lens surface by spherical aberration is refracted by chromatic aberration. Since the angle can be canceled using the action of making the angle smaller than that of the light of B or G, the focal position can be made substantially constant regardless of the color of the light. It is possible to display a high quality image without any.

[0013]

A ninth aspect of the present invention is directed to a light emitting element arranged in the array and a plurality of lens arrays for converting output light from each light emitting element into a light flux from infinity. A plurality of groups of optical systems in which the number of R, G, and B three-color light emitting elements are arranged one-dimensionally at a ratio inversely proportional to the single output of each color as a one-dimensional array lens. It is.

[0014]

(Solution 10) (Solution 10) Solution 10
Describes, for a plurality of lens arrays that convert the light emitted from the light emitting elements arranged in the array and the light emitted from each light emitting element into a light flux from infinity, a three-dimensional array lens of R, G, and B as a two-dimensional array lens. That is, a plurality of optical systems are arranged in a two-dimensional manner with the number of color light emitting elements being two-dimensionally arranged at a ratio inversely proportional to the single output of each color.

[0015]

(Solution 11) (Solution 11) Solution 11
Is a multiplexing optical system according to claims 1 to 8, a rotary deflecting element for scanning a beam converged by the optical system in a one-dimensional direction, and an fθ optical system for correcting reflected light from the rotary deflecting element. , A sub-scanning deflecting element for deflecting the output light from the fθ optical system in a direction perpendicular to the direction of deflection of the rotary deflecting element, and a reflective screen for projecting light scanned by these optical elements. That is, a projection display device is configured.

[0016]

[Solution Means 12] (Corresponding to claim 12) Solution Means 12
Is a multiplexing optical system according to claims 1 to 8, a rotary deflecting element for scanning a beam converged by the optical system in a one-dimensional direction, and an fθ optical system for correcting reflected light from the rotary deflecting element. A sub-scanning deflecting element for deflecting the output light from the fθ optical system in a direction perpendicular to the direction of deflection of the rotary deflecting element, and a transmission screen for projecting light scanned by these optical elements. That is, a projection display device is configured.

[0017]

[Solution Means 13] (Corresponding to claim 13) Solution Means 13
A plurality of groups of optical systems according to claim 9, a rotary deflecting element for scanning a beam converged by the optical systems in a one-dimensional direction,
An optical system for correcting the reflected light from the rotary deflecting element;
a sub-scanning deflecting element that deflects output light from the θ optical system in a direction perpendicular to the direction of deflection of the rotary deflecting element, and a reflective screen that projects light scanned by these optical elements. It is a projection display device.

[0018]

(Solution 14) (Solution 14) Solution 14
A plurality of groups of optical systems according to claim 9, a rotary deflecting element for scanning a beam converged by the optical systems in a one-dimensional direction,
An optical system for correcting the reflected light from the rotary deflecting element;
a back scanning deflecting element that deflects output light from the θ optical system in a direction perpendicular to the direction of deflection of the rotary deflecting element, and a transmission screen that projects light scanned by these optical elements. It is a projection display device.

[0019]

(Solution 15) (Solution 15) Solution 15
Are a plurality of groups of optical systems according to claim 10, a rotary deflecting element for scanning a beam converged by the optical system in a one-dimensional direction, an fθ optical system for correcting reflected light from the rotary deflecting element, and an fθ optical system. A sub-scanning deflecting element that deflects output light from the system in a direction perpendicular to the direction of deflection of the rotary deflecting element;
A front projection type display device including a reflection type screen that projects light scanned by these optical elements.

[0020]

[Solution Means 16] (Corresponding to claim 16) Solution Means 16
Are a plurality of groups of optical systems according to claim 10, a rotary deflecting element for scanning a beam converged by the optical system in a one-dimensional direction, an fθ optical system for correcting reflected light from the rotary deflecting element, and an fθ optical system. A sub-scanning deflecting element that deflects output light from the system in a direction perpendicular to the direction of deflection of the rotary deflecting element;
A rear projection display device including a transmission screen that projects light scanned by these optical elements.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a plan view of an example of a one-dimensionally arrayed light emitting element and a lens array section constituting a multiplexing optical system according to the present invention, and FIG.
Is shown in FIG. 3 shows a planar shape of one example of a one-dimensionally arrayed light emitting element and a lens array part constituting the multiplexing optical system according to the present invention. In the arrangement shown in FIG. 3, the elements are arranged at equal intervals in the vertical and horizontal directions. However, for example, the elements may be arranged in a hexagonal close-packed arrangement so that the elements are arranged at equal intervals. With such an arrangement, the light emitting element array
An LD or LED array arrangement (arrangement of R, G, and B light emitting elements) that generates R, G, and B lights of balanced intensity as a whole is provided. Is such that the intensity modulation is performed independently by an appropriate control system (not shown).

FIG. 4 conceptually shows an example of the projection display device according to the present invention. In this case, the light emitted from the light emitting element array enters the lens array. The lens array has lenses arranged at positions corresponding to the respective light emitting elements of the light emitting element array, and the optical axis of each lens is parallel and has a predetermined divergence angle, so that incident light is converted into parallel light. Curvature is defined. Therefore, the plurality of lights emitted from the lens array are converted into light beams from infinity, which are parallel to each other and have no divergence angle. An optical element having a light condensing function is provided behind the lens array, so that a light beam from infinity is condensed into a finite light beam. Behind this, a rotary deflecting element typified by a polygon mirror is arranged, whereby the light beam is deflected in the horizontal direction. After passing through the fθ optical system, the deflected light is deflected in the vertical direction by a sub-scanning deflecting element having a deflecting area larger than the scanning width, and is guided onto a screen. The above-described series of optical systems are configured so that light emitted from each light emitting element forms a minute point image on a screen and overlaps each other. In this case, a deflection element such as a galvanometer mirror can be used as well as the polygon mirror scanner described above.

The color of the formed spot expresses a color according to the intensity ratio of the output of each of the R, G, and B colors of the light emitting element array. By controlling the output of the light emitting element array and controlling the deflection element to move the spot to the next scanning position in the vertical direction while scanning the spot once in the horizontal direction, a two-dimensional image is formed on the screen. Images can be projected and drawn. By controlling the light emitting elements so that the output according to the input image is performed by the control system of the light emitting element array, it is possible to draw a viewable image by front projection, and to invert the input image horizontally. , It is possible to draw a viewable image by rear projection. Also, particularly when used for rear projection, inserting a mirror between the sub-scanning deflecting element and the screen makes it possible to extend the optical path length while reducing the overall size of the device, thereby reducing the size of the entire device. It becomes possible.

FIG. 5 schematically shows an enlarged portion where light from the light emitting element array is condensed. The optical element 2 is constituted by a lens having a concave surface. This is a configuration in a case where the distance between the optical element 1 and the optical element 2 is shorter than the focal length of the optical element 1. The convex lens can be used if it is arranged so that the distance from the optical element 1 is longer than the focal length of the optical element 1.

FIG. 6 shows an example in which the multiplexing optical system according to the present invention is constituted by a plurality of groups of optical systems A, B and C. In this case, the multiplexing optical system is constituted by three groups, but is not limited to this, and can be constituted by more groups. As shown in FIG. 7, an optical element 3 having a function of narrowing the interval of light rays in the arrangement direction of a plurality of groups is arranged behind the optical element 2 having the configuration shown in FIG. 6, and a spot formed by each group on a screen. By arranging the intervals so as to match the vertical scanning intervals of the two-dimensional image, a plurality of independent spots can be formed at once, and a plurality of spots can be operated at once. As a result, the time for drawing the entire screen can be significantly reduced.

FIG. 8 shows an embodiment of the light emitting element array in the multiplexing optical system according to the present invention. When a large number of light-emitting elements are arranged, a light source having the shortest wavelength of the three colors, ie, blue, is arranged in the central region, green is arranged outside, and red is arranged on the outermost periphery. When monochromatic light is incident parallel to the optical axis of the spherical convex lens, the focus position becomes closer to the lens surface as the distance from the optical axis center increases. This is called spherical aberration. As a result, the incident light cannot be focused on a minute spot. On the other hand, when light with different wavelengths is incident on a position distant from the center of the optical axis of the lens, light having a longer wavelength has a smaller rate of refraction, and the focus position is farther from the lens surface. This is called chromatic aberration. By using both of them, as described above, light passing near the center of the light-emitting element array, that is, near the optical axis of the subsequent optical element is constituted by blue light having a short wavelength. In the configuration of long light (green → red), both spherical aberration and chromatic aberration cancel each other, and as a result, it is possible to focus on almost the same place, so that minute spots on the screen surface overlap each other. They can be formed together.

Although the embodiment of the present invention has been described as a multiplexing optical system of a projection image display apparatus, this multiplexing optical system is not limited to the projection of an image which is directly observed by a human, but has a certain brightness. Even if it is applied to other necessary image forming apparatuses, the effect is exhibited. Therefore, the scope of application of the present invention is not limited to a projection image display device in which a person directly looks down.

[0028]

The operation and effect of the present invention are as described above. The operation and effect of the present invention can be summarized as follows according to the main claims. In the multiplexing optical system according to the first aspect of the present invention, since the output light from the plurality of light emitting elements is converted into a light flux from infinity and then converted into a finite light flux, the number of light emitting elements as light sources and Regardless of the size of the light emitting surface, it is possible to converge on a fine spot light.

In the optical system according to the second aspect of the present invention,
Each of the light emitting elements has a plurality of R (red), G (green), B
(Blue) three-color light emitting element combination,
Since the output light is converted into a finite light beam in the multiplexing optical system, different colors can be expressed by modulating the output of each light emitting element.

In the optical system according to the third and fourth aspects of the present invention, a single light-emitting element can be miniaturized and arranged at a narrow pitch. The number of output gradations can be increased.

In the optical system according to the fifth aspect of the present invention,
Since the light-emitting elements of each color are arranged at a ratio inversely proportional to the single output of each light-emitting element, a wide range of output light from white to R, G, and B single colors is obtained by combining them. Color can be expressed.

In the optical system according to the eighth aspect,
The central part of the light emitting element is composed of a long wavelength light source, and the light source has a longer wavelength as it goes to the outside, so that spherical aberration and chromatic aberration cancel each other out. Can be superimposed on a spot.

Since the optical system according to the ninth and tenth aspects comprises a plurality of independent optical systems, a plurality of spots expressing different colors can be formed at the same time.

In the projection type display device according to the present invention, since a two-dimensional image is obtained by scanning a fine spot of a single color capable of expressing a wide range of gradations, a high definition is obtained. Thus, a display image having excellent color reproducibility can be obtained.

In the projection type display apparatus according to the thirteenth to sixteenth aspects, a two-dimensional image is expressed by simultaneously scanning a plurality of spots, so that an image with a high frame rate can be displayed.

[Brief description of the drawings]

FIG. 1 is a plan view of an example of one-dimensionally arrayed light-emitting elements and lens array units constituting a multiplexing optical system according to the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is a plan view of an example of one-dimensionally arrayed light-emitting elements and lens array units constituting a multiplexing optical system according to the present invention.

FIG. 4 is a perspective view conceptually showing an example of a projection display device according to the present invention.

FIG. 5 is an enlarged schematic view showing a portion where light from a light emitting element array is collected.

FIG. 6 is a plan view of an example in which the multiplexing optical system according to the present invention is configured by a plurality of groups of optical systems.

FIG. 7 is a plan view of another example in which an optical element having a function of narrowing the light beam interval in the arrangement direction of a plurality of groups is arranged behind the optical element 2 having the configuration of FIG.

FIG. 8 is a schematic view showing one embodiment of a light emitting element array in the multiplexing optical system according to the eighth aspect of the present invention.

Claims (17)

[Claims]
1. A multiplexing optical system of a projection type image display device, comprising: a plurality of light emitting elements arranged in an array and each light emitting element for converting output light from each light emitting element into a light flux from infinity. A multiplexing optical system including a plurality of corresponding lens arrays and an optical element that commonly converts output light of each of the lens arrays into a finite light beam.
2. A multiplexing optical system for a projection type image display device, comprising: a plurality of light emitting elements arranged in an array and each light emitting element for converting output light from each light emitting element into a light flux from infinity. A multiplexing optical system comprising a plurality of corresponding lens arrays and an optical element for commonly converting each output light into a finite light beam, wherein each light emitting element is a combination of R, G, and B three-color light emitting elements. An optical system characterized by comprising:
3. A plurality of light emitting elements arranged in an array, a plurality of lens arrays corresponding to each light emitting element for converting output light from each light emitting element into a light flux from infinity, and finite output light from each of the lens arrays. In a multiplexing optical system of a projection-type image display device including an optical element that commonly converts a light beam into three light beams, an optical system in which each light emitting element is configured by a combination of R, G, and B three-color light emitting elements. An optical system comprising a semiconductor laser as a color light emitting element.
4. A plurality of light emitting elements arranged in an array, a plurality of lens arrays corresponding to each light emitting element for converting output light from each light emitting element into a light flux from infinity, and finite output light from each of the lens arrays. In a multiplexing optical system of a projection-type image display device including an optical element that commonly converts a light beam into three light beams, an optical system in which each light emitting element is configured by a combination of R, G, and B three-color light emitting elements. An optical system comprising an LED light source as a color light emitting element.
5. The multiplexing optical system according to claim 4, wherein R, G,
B. An optical system, wherein the number of light emitting elements of each color is arranged in a ratio inversely proportional to the single output of each light emitting element.
6. In a multiplexing optical system of a projection type image display device, a plurality of said light emitting elements are arranged in a one-dimensional manner at a ratio inversely proportional to a single output of a light emitting element of each color, and said lens array is used as a light source. An optical system characterized by being one-dimensionally arranged to correspond to (1).
7. A plurality of light emitting elements in the multiplexing optical system are two-dimensionally arranged at a ratio inversely proportional to a single output of a light emitting element of each color so that the lens array corresponds to these light sources. An optical system characterized by being arranged two-dimensionally.
8. A light-emitting element arranged in a two-dimensional array, a plurality of lens arrays for converting output light from each light-emitting element into a light beam from infinity, and each output light being shared by a finite light beam. In a multiplexing optical system of a projection type image display device including optical elements for conversion, a blue light source is provided in a central region of a two-dimensional array light emitting device, a green light source is provided on an outer peripheral portion thereof, and a red light source is provided on an outermost peripheral portion. An optical system characterized by:
9. A one-dimensional array lens comprising a plurality of lens elements arranged in the array and a plurality of lens arrays for converting output light from each of the light emitting elements into a light beam from infinity. A multiplexing optics for a projection type image display device, comprising a plurality of groups of optical systems in which the number of B three-color light emitting elements is one-dimensionally arranged at a ratio inversely proportional to the single output of each color. system.
10. A two-dimensional array lens comprising a plurality of light emitting elements arranged in an array and a plurality of lens arrays for converting output light from each light emitting element into a light flux from infinity, wherein R, G, R A multiplexing optical system for a projection type image display, comprising: a plurality of groups of optical systems arranged in a two-dimensional manner with the number of three-color light emitting elements of B being inversely proportional to the output of each color alone. system.
11. The multiplexing optical system according to claim 1, wherein:
A rotating deflecting element that scans the beam converged by the optical system in a one-dimensional direction, an fθ optical system that corrects reflected light from the rotating deflecting element, and a deflection direction of the rotating deflecting element that outputs light from the fθ optical system. 1. A front projection display device comprising: a sub-scanning deflecting element that deflects light in a direction perpendicular to the optical axis; and a reflective screen that projects light scanned by these optical elements.
12. The multiplexing optical system according to claim 1, wherein:
A rotary deflecting element that scans the beam converged by the optical system in a one-dimensional direction, an fθ optical system that corrects reflected light from the rotary deflecting element, and a deflection direction of the rotary deflecting element that outputs light from the fθ optical system. A rear projection display device comprising: a sub-scanning deflecting element that deflects light in a direction perpendicular to the optical axis; and a transmission screen that projects light scanned by these optical elements.
13. A plurality of groups of optical systems according to claim 9, a rotary deflecting element for scanning a beam converged by the optical system in a one-dimensional direction, and an fθ optical system for correcting reflected light from the rotary deflecting element. , A sub-scanning deflecting element that deflects the output light from the fθ optical system in a direction perpendicular to the direction of deflection of the rotary deflecting element, and a reflective screen that projects light scanned by these optical elements. A front projection display device characterized by the above-mentioned.
14. A plurality of groups of optical systems according to claim 9, a rotary deflecting element for scanning a beam converged by the optical system in a one-dimensional direction, and an fθ optical system for correcting reflected light from the rotary deflecting elements. , A sub-scanning deflecting element that deflects the output light from the fθ optical system in a direction perpendicular to the direction of deflection of the rotary deflecting element, and a transmission screen that projects light scanned by these optical elements. A rear projection display device characterized by the above-mentioned.
15. A plurality of optical systems according to claim 10, a rotary deflecting element for scanning a beam converged by said optical system in a one-dimensional direction, and fθ for correcting reflected light from the rotary deflecting element.
An optical system, a sub-scanning deflecting element that deflects output light from the fθ optical system in a direction perpendicular to the direction of deflection of the rotary deflecting element, and a reflective screen that projects light scanned by these optical elements. A front projection display device comprising:
16. A plurality of groups of optical systems according to claim 10, a rotary deflecting element for scanning a beam converged by the optical system in a one-dimensional direction, and fθ for correcting reflected light from the rotary deflecting element.
An optical system, a sub-scanning deflecting element that deflects output light from the fθ optical system in a direction perpendicular to the direction of deflection of the rotary deflecting element, and a transmission screen that projects light scanned by these optical elements. A rear projection display device, comprising:
17. An optical system of an optical image forming apparatus, comprising:
A plurality of light-emitting elements arranged in an array and a plurality of lens arrays corresponding to each light-emitting element that converts output light from each light-emitting element into a light flux from infinity, and each output light common to a finite light flux A multiplexing optical system consisting of optical elements for conversion.
JP2001182218A 2001-06-15 2001-06-15 Projection type image display and multiplexing optical system for the same Pending JP2002372677A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006522358A (en) * 2003-03-31 2006-09-28 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィKoninklijke Philips Electronics N.V. Autostereoscopic display
JP2006301050A (en) * 2005-04-18 2006-11-02 Seiko Epson Corp Optical scanner, method of controlling optical scanner, and image display device
JP2007058163A (en) * 2005-07-27 2007-03-08 Ricoh Co Ltd Light source apparatus, optical modulation apparatus, display apparatus, light condensing lighting system and projection type color display apparatus
JP2009210988A (en) * 2008-03-06 2009-09-17 Canon Inc Image-projecting device
US7934840B2 (en) 2005-12-05 2011-05-03 Samsung Electronics Co., Ltd. Optical device and projection system comprising the same

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006522358A (en) * 2003-03-31 2006-09-28 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィKoninklijke Philips Electronics N.V. Autostereoscopic display
JP4668171B2 (en) * 2003-03-31 2011-04-13 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ Autostereoscopic display
JP2006301050A (en) * 2005-04-18 2006-11-02 Seiko Epson Corp Optical scanner, method of controlling optical scanner, and image display device
JP4670451B2 (en) * 2005-04-18 2011-04-13 セイコーエプソン株式会社 Optical scanning device, optical scanning device control method, and image display device
JP2007058163A (en) * 2005-07-27 2007-03-08 Ricoh Co Ltd Light source apparatus, optical modulation apparatus, display apparatus, light condensing lighting system and projection type color display apparatus
US7934840B2 (en) 2005-12-05 2011-05-03 Samsung Electronics Co., Ltd. Optical device and projection system comprising the same
JP2009210988A (en) * 2008-03-06 2009-09-17 Canon Inc Image-projecting device

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