JP2007108772A - Three-dimensional display system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a three-dimensional display system capable of displaying a high quality, three-dimensional image that has a large quantity of output light. <P>SOLUTION: A composing means of a first projector composes the first image light of a right-eye image and the second and third image light beams of a left-eye image by a cross dichroic prism. The composing means of the first projector also makes the polarization direction of the first image light of the right-eye image perpendicular to the polarization direction of the second and third image light beams of the left-eye image during the incidence to the composing means. A composing means of a second projector composes the first image light of the left-eye image and the second and third image light beams of the right-eye image by the cross dichroic prism. The composing means of the second projector also makes the polarization direction of the first image light of the left-eye image perpendicular to the polarization direction of the first image light of the right-eye image of the first projector during the incidence to the composing means, and makes the polarization direction of the second and third image light beams of the right-eye image perpendicular to the polarization direction of the first image light of the right-eye image of the first projector during the incidence to a screen. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a three-dimensional display system, and more particularly to a three-dimensional display system that performs color three-dimensional display.

  Conventionally, there is a three-dimensional display system in which an image projected by a pair of liquid crystal projectors can be stereoscopically viewed using polarized glasses having different polarization directions on the left and right.

  In the conventional three-dimensional display system, the first liquid crystal projector in which the three primary color RGB image lights to be projected are all linearly polarized light in the same polarization direction and the three primary color RGB image light to be projected are all in the same polarization direction. A second liquid crystal projector that is linearly polarized light orthogonal to the image light of the first liquid crystal projector is used. The right eye image projected by the first liquid crystal projector can be viewed through, for example, the right eye lens of polarized glasses, and the left eye image projected by the second liquid crystal projector can be viewed, for example, through the left eye lens of polarized glasses, enabling stereoscopic viewing. It is said.

  Conventionally, when two-dimensional display is performed by a single liquid crystal projector, the liquid crystal projector has used all the three primary color RGB image lights to be linearly polarized in the same polarization direction. Liquid crystal projectors that are linearly polarized light orthogonal to image light are used.

  This is because, for example, in a dichroic prism that synthesizes RGB image light in a liquid crystal projector, the wavelength characteristic is shifted by the displacement of the incident angle of the image light as shown in FIG. In FIG. 1, the relationship between the wavelength, the transmittance (T), and the reflectance (R) is shown. The solid line indicates the incident angle of 45 degrees for S-polarized light and P-polarized light, and the broken line indicates the S-polarized light and P-polarized light. The case where the incident angle is shifted from 45 degrees is shown.

  For this reason, when all the three primary color RGB image lights are linearly polarized in the same polarization direction, for example, the wavelength adjacent to the R image light in the G image light is a wavelength region of the G image light due to the displacement of the incident angle in the dichroic prism. It enters and is attenuated. The same applies to the wavelength region adjacent to the G image light in the R image light, the wavelength region adjacent to the G image light in the B image light, and the wavelength region adjacent to the B image light in the G image light. This attenuation reduces the amount of output light.

  On the other hand, when the G image light is linearly polarized light that is orthogonal to the R and B image light, the polarization wavelength of the G image light and the R and B image light is orthogonalized by the dichroic prism, thereby the adjacent wavelengths. It can be used effectively without attenuation of the area, and the output light quantity can be increased.

  However, in the conventional three-dimensional display system, the first liquid crystal projector in which the three primary color RGB image lights to be projected are all linearly polarized light in the same polarization direction and the three primary color RGB image lights to be projected are all in the same polarization direction. Using a second liquid crystal projector that is linearly polarized light orthogonal to the image light of the first liquid crystal projector, and viewing the right eye image projected by the first liquid crystal projector through, for example, the right eye lens of polarized glasses, the second liquid crystal Since the left-eye image projected by the projector is configured to be viewed through, for example, the left-eye lens of polarized glasses, the polarization planes of the G image light and the R and B image lights cannot be orthogonalized for each of the right-eye image and the left-eye image. Therefore, there is a problem that the amount of output light is reduced.

  The present invention has been made in view of the above points, and an object thereof is to provide a three-dimensional display system capable of displaying a high-quality three-dimensional image with a large output light amount.

According to the first aspect of the present invention, color separation means for separating white light into three primary color lights, image modulation means for image-modulating each of the three primary color lights, and image light of the three primary colors output from the image modulation means Comprising first and second projectors for projecting composite image light from the synthesizing unit onto a screen from a projection lens,
The combining means of the first projector combines the first image light of the right eye image and the second and third image lights of the left eye image with a cross-type dichroic prism, and polarization of the first image light of the right eye image The direction is orthogonal to the polarization directions of the second and third image lights of the other left-eye images at the time of incidence of the combining means,
The synthesizing means of the second projector combines the first image light of the left eye image and the second and third image lights of the right eye image with a cross-type dichroic prism, and polarization of the first image light of the left eye image The direction of polarization of the second and third image lights of the other right-eye image upon incidence of the combining means and the polarization of the first image light of the right-eye image of the first projector upon incidence on the screen It was made orthogonal to the direction.

  Therefore, three-dimensional display can be performed using the first and second projectors whose polarization directions of the three primary colors are not the same, and a high-quality three-dimensional image can be displayed with a large output light amount. Become.

  According to a second aspect of the present invention, the first image light is green among the three primary colors.

  For this reason, a three-dimensional display can be performed with a projection image with good display quality.

  According to a third aspect of the present invention, the second projector is provided with a polarization plane rotating element that rotates the polarization directions of the three primary color image lights by 90 degrees with respect to the first projector.

  For this reason, it is possible to perform a three-dimensional display with a projection image having substantially the same color tone and brightness by using projectors having substantially the same configuration and the same color tone and brightness.

In the invention according to claim 4, the first projector includes a first retardation plate that rotates the polarization directions of the three primary color image lights 45 degrees clockwise or counterclockwise,
The second projector is provided with a second retardation plate that rotates the polarization directions of the three primary colors of image light by 45 degrees counterclockwise or clockwise.

  For this reason, the reflection characteristics of the screen can be made substantially the same between the two projectors, and high-quality three-dimensional display can be performed.

  According to a fifth aspect of the present invention, there is provided an integrator constituted by a cross-eye lens between the light source and the color separation means.

  According to the present invention, three-dimensional display is possible using the first and second projectors whose polarization directions of the three primary color image lights are not the same, and a high-quality three-dimensional image is displayed with a large output light amount. Is possible.

  FIG. 2 shows an external view of an embodiment of the projector apparatus of the present invention. This apparatus includes a liquid crystal projector 10A and a liquid crystal projector 10B. The liquid crystal projector 10A projects the three primary color image lights Ra, Ga and Ba onto the screen 12, and the liquid crystal projector 10B projects the three primary color image lights Rb, Gb and Bb onto the screen 20.

  The image light Ra, Ga, Ba projected by the liquid crystal projector 10A has the same polarization direction of the linearly polarized light of the image light Ra, Ba on the screen 20, as shown in FIG. The polarization direction is orthogonal to the polarization direction of the image light Ra, Ba. Similarly, the image light Rb, Gb, Bb projected by the liquid crystal projector 10B is on the screen 20, and the polarization direction of the linearly polarized light of the image light Rb, Bb is the same as the polarization direction of the image light Ga. The polarization direction of the linearly polarized light is orthogonal to the polarization directions of the image lights Rb and Bb.

  FIG. 4 is a diagram showing the configuration of the first embodiment of the liquid crystal projectors 10A and 10B. Although the liquid crystal projectors 10A and 10B have substantially the same configuration, the liquid crystal projector 10B shown in FIG. 4B is different from the liquid crystal projector 10B shown in FIG. Is added. The polarization plane rotating element 14B rotates the polarization planes of all the image lights Rb, Gb, and Bb by 90 degrees. When the image light Ga of the liquid crystal projector 10A is inclined 45 degrees with respect to the horizontal of the liquid crystal projector, the relationship between the image light Ra, Ga, Ba and the image light Rb, Gb, Bb shown in FIG. 3 can be easily obtained. .

  A circle on the optical axis in FIG. 4A indicates the polarization direction (for example, S polarization) of the image light Ga, and a bar indicates the polarization direction (for example, P polarization) of the image light Ra and Ba. 4B, the circle on the optical axis to the left of the polarization plane rotation element 14B indicates the polarization direction (for example, S polarization) of the image light Gb, and the bar indicates the polarization direction of the image light Rb, Bb (for example, P polarization). ), The bar on the right optical axis from the polarization plane rotating element 14B indicates the polarization direction of the image light Gb (eg, P-polarized light), and the circle indicates the polarization direction of the image light Rb, Bb (eg, S-polarized light). Show.

  5 and 6 are diagrams showing the configuration of the second embodiment of the liquid crystal projectors 10A and 10B. The liquid crystal projectors 10A and 10B have substantially the same configuration, but the liquid crystal projector 10A shown in FIG. 5A is provided with a λ / 2 phase difference plate 16A in front of the projection lens 12A. The λ / 2 phase difference plate 16A is a fast axis (or slow axis) tilted 22.5 degrees counterclockwise as shown by a solid line with respect to the horizontal axis of the liquid crystal projector shown by a broken line in FIG. ), And the polarization direction (for example, P-polarized light) of the image light Ga before the λ / 2 retardation plate in the liquid crystal projector indicated by the broken line in FIG. 5C is counterclockwise as indicated by the solid line. , And is projected from the projection lens 12A. Similarly, the image light Ra and Ba are also rotated 45 degrees counterclockwise.

  On the other hand, the liquid crystal projector 10B shown in FIG. 6A is provided with a λ / 2 phase difference plate 16B in front of the projection lens 12B. The λ / 2 phase difference plate 16B is a fast axis (or slow axis) tilted 22.5 degrees clockwise as shown by a solid line with respect to the horizontal axis of the liquid crystal projector shown by a broken line in FIG. 6B. The polarization direction (for example, P-polarized light) of the image light Gb preceding the λ / 2 phase difference plate in the liquid crystal projector indicated by the broken line in FIG. 6C is 45 clockwise as indicated by the solid line. , And projected from the projection lens 12B. Similarly, the image lights Rb and Bb are rotated 45 degrees counterclockwise. Accordingly, if the polarization direction of the image light Gb preceding the λ / 2 retardation plate in the liquid crystal projector is horizontal, the relationship between the image light Ra, Ga, Ba and the image light Rb, Gb, Bb shown in FIG. Easy to get.

  FIG. 7 shows an external view of the first embodiment of the projector device of the three-dimensional display system of the present invention. In the figure, the same parts as those in FIG. This apparatus includes a liquid crystal projector 10A and a liquid crystal projector 10B. The liquid crystal projector 10A projects the right eye image light Gar and the left eye image light Ral, Bal onto the screen 12, and the liquid crystal projector 10B outputs the left eye image light Gbl and the right eye image light Rbr, Bbr to the screen 20. Project to.

  As shown in FIG. 8, the image light Ral, Gar, and Bal projected by the liquid crystal projector 10A has the same polarization direction of the linearly polarized light of the image light Ral and Bal of the left-eye image as shown in FIG. The polarization direction of the linearly polarized light of the light Gar is orthogonal to the polarization directions of the image light Ral and Bal. Similarly, the image light Rbr, Gbl, Bbr projected by the liquid crystal projector 10B is on the screen 20, and the polarization direction of the linearly polarized light of the image light Rbr, Bbr of the right eye image is the same as the polarization direction of the image light Gar of the right eye image. The polarization direction of the linearly polarized light of the image light Gbl of the left eye image is the same as the polarization direction of the image lights Rbl and Bbl of the left eye image.

  Therefore, three-dimensional display can be performed using the first and second projectors whose polarization directions of the three primary colors are not the same, and a high-quality three-dimensional image can be displayed with a large output light amount. Become. Further, among the image lights R, G, and B, the image lights R and B whose wavelengths are not adjacent to each other have the same polarization direction, and the polarization directions of the image light G are different. It can be performed.

  FIG. 9 is a diagram showing the configuration of the first embodiment of the liquid crystal projectors 10A and 10B. Although the liquid crystal projectors 10A and 10B have substantially the same configuration, the liquid crystal projector 10B shown in FIG. 9B is different from the liquid crystal projector 10A shown in FIG. Is added. The polarization plane rotating element 14B rotates the polarization planes of all image lights Rbr, Gbl, and Bbr by 90 degrees. When the image light Ga of the liquid crystal projector 10A is inclined 45 degrees with respect to the horizontal of the liquid crystal projector, the relationship between the image light Ral, Gar, Bal and the image light Rbr, Gbl, Bbr shown in FIG. 8 can be easily obtained. .

  The circles on the optical axis in FIG. 9A indicate the polarization direction (for example, S polarization) of the image light Gar, and the bar marks indicate the polarization directions (for example, P polarization) of the image light Ral and Bal. 9B, the circle on the optical axis to the left of the polarization plane rotating element 14B indicates the polarization direction of the image light Gbl (for example, S polarization), and the bar indicates the polarization direction of the image light Rbr, Bbr (for example, P polarization). ), The bar on the right optical axis from the polarization plane rotating element 14B indicates the polarization direction of the image light Gbl (for example, P-polarization), and the circle indicates the polarization direction of the image light Rbr, Bbr (for example, S-polarization). Show.

  For this reason, it is possible to perform a three-dimensional display with a projection image having substantially the same color tone and brightness by using projectors having substantially the same configuration and the same color tone and brightness.

  FIG. 10 is a diagram showing the configuration of the second embodiment of the liquid crystal projectors 10A and 10B. The liquid crystal projectors 10A and 10B have substantially the same configuration, but the liquid crystal projector 10A is provided with a λ / 2 phase difference plate 16A in front of the projection lens 12A. The λ / 2 retardation plate 16A has a fast axis (or slow axis) inclined 22.5 degrees counterclockwise with respect to the horizontal axis of the liquid crystal projector, and λ / 2 in the liquid crystal projector. The polarization direction (for example, P-polarized light) of the image light Gar before the phase difference plate is rotated 45 degrees counterclockwise and projected from the projection lens 12A. Similarly, the image lights Ral and Bal are rotated 45 degrees counterclockwise.

  In contrast, the liquid crystal projector 10B is provided with a λ / 2 phase difference plate 16B in front of the projection lens 12B. The λ / 2 phase difference plate 16B has a fast axis (or slow axis) inclined 22.5 degrees clockwise with respect to the horizontal axis of the liquid crystal projector, and is positioned at λ / 2 in the liquid crystal projector. The polarization direction (for example, P-polarized light) of the image light Gbl before the phase difference plate is rotated 45 degrees clockwise and projected from the projection lens 12B. Similarly, the image lights Rbr and Bbr are rotated 45 degrees counterclockwise. Accordingly, if the polarization direction of the image light Gbl preceding the λ / 2 retardation plate in the liquid crystal projector is horizontal, the relationship between the image light Ral, Gar, Bal and the image light Rbr, Gbl, Bbr shown in FIG. Easy to get.

  For this reason, the reflection characteristics of the screens can be made substantially the same between the two projectors, and high-quality three-dimensional display can be performed.

  FIG. 11 shows a detailed structural diagram of the second embodiment of the liquid crystal projector. In the figure, the white light emitted from the light source 30 passes through the integrator 32 constituted by the eyelet lens, and then passes through the polarization conversion element 34 so that, for example, the polarization direction is changed to S-polarized light. In the dichroic mirror 36, only the primary color light B is reflected by this light, and the primary color lights R and G are transmitted. Thereafter, the primary color light B reflected by the dichroic mirror 36 is reflected by the mirror 38, and S-polarized image light B is obtained through the lens 39, the liquid crystal display panel 40 of the B image and the λ / 2 plate 41, and the cross type dichroic is obtained. It enters the prism 42.

  The primary color lights R and G that have passed through the dichroic mirror 36 are reflected by the dichroic mirror 44 only, and the primary color light R is transmitted. The primary color light G reflected by the dichroic mirror 44 is obtained as P-polarized image light G through the lens 45 and the G image liquid crystal display panel 46 and is incident on the cross-type dichroic prism 42. The primary color light R transmitted through the dichroic mirror 44 is reflected by the mirrors 48 and 49, and S-polarized image light R is obtained through the lens 50, the liquid crystal display panel 51 of the R image and the λ / 2 plate 53, and the cross type dichroic prism 42. Is incident on.

  The cross-type dichroic prism 42 combines the S-polarized image light B and R and the P-polarized image light G. The combined light passes through the λ / 2 phase difference plate 52 (corresponding to 16A and 16B), and is projected toward the screen from the projection lens 54 (corresponding to 12A and 12B).

  FIG. 12 shows a detailed structural diagram of a modification of the second embodiment of the liquid crystal projector. In the figure, the same parts as those in FIG. In FIG. 12, the white light emitted from the light source 30 passes through the integrator 32 configured with a moth-eye lens, and then passes through the polarization conversion element 34, so that the polarization direction is changed to S-polarized light, for example. The dichroic mirror 56 reflects the primary color lights G and B and transmits the primary color light R. Thereafter, the primary color light R transmitted through the dichroic mirror 56 is reflected by the mirror 57, and S-polarized image light R is obtained through the lens 58, the liquid crystal display panel 59 of the R image and the λ / 2 plate 65, and the dichroic mirror 60, The light passes through 61 and enters the λ / 2 phase difference plate 52.

  Of the primary color lights G and B reflected by the dichroic mirror 56, only the primary color light G is reflected by the dichroic mirror 62 and the primary color light B is transmitted. The primary color light G reflected by the dichroic mirror 62 passes through the lens 63 and the liquid crystal display panel 64 of the G image, is reflected by the dichroic mirror 60 to obtain P-polarized image light G, and is combined with the image light R. The primary color light B transmitted through the dichroic mirror 62 passes through the lens 68 and the liquid crystal display panel 69 of the B image and the λ / 2 plate 66, and is reflected by the mirror 70 to obtain S-polarized image light B. The dichroic mirror 61 Reflected and combined with the image lights R and G. The combined light passes through the λ / 2 phase difference plate 52 (corresponding to 16A and 16B), and is projected toward the screen from the projection lens 54 (corresponding to 12A and 12B).

  FIG. 13 shows an external view of a second embodiment of the projector device of the three-dimensional display system of the present invention. In the figure, white light emitted from the light source 80 is incident on the polarization separation element 82. The polarization separation element 82 separates and outputs S-polarized white light and P-polarized white light. For example, S-polarized white light indicated by a circle on the optical axis is reflected by the mirror 84 and is incident on the processing system 86A, and for example P-polarized white light indicated by a bar on the optical axis is incident on the processing system 86B.

  The processing system 86A projects the image light Gar of the right eye image and the image lights Ral and Bal of the left eye image onto the screen 12, and the processing system 86B outputs the image light Gbl of the left eye image and the image lights Rbr and Bbr of the right eye image. Project to.

  As shown in FIG. 14, the image light Ral, Gar, and Bal projected by the processing system 86A have the same polarization direction of the linearly polarized light of the left-eye image light Ral and Bal on the screen 20, as shown in FIG. The polarization direction of the linearly polarized light of the light Gar is orthogonal to the polarization direction of the image light Ral and Bal. Similarly, the image light Rbr, Gbl, and Bbr projected by the processing system 86B are on the screen 20, and the polarization direction of the linearly polarized light of the right-eye image light Rbr and Bbr is the same as the polarization direction of the right-eye image light Gar. The polarization direction of the linearly polarized light of the image light Gbl of the left eye image is the same as the polarization direction of the image lights Rbl and Bbl of the left eye image.

  As described above, since light is supplied from the same light source to the processing systems 86A and 86B, even if the light source is deteriorated, three-dimensional display is performed with projection images having the same color tone and brightness as those of the first and second projectors. be able to.

  FIG. 15 is a diagram showing the configuration of the first embodiment of the processing systems 86A and 86B. The processing systems 86A and 86B have substantially the same configuration. However, the processing system 86B shown in FIG. 15B differs from the processing system 86A shown in FIG. 15A in the stage before the projection lens 12B. Is added. The polarization plane rotating element 14B rotates the polarization planes of all image lights Rbr, Gbl, and Bbr by 90 degrees. When the image light Ga of the processing system 86A is inclined 45 degrees with respect to the horizontal of the liquid crystal projector, the relationship between the image light Ral, Gar, Bal and the image light Rbr, Gbl, Bbr shown in FIG. 14 can be easily obtained. .

  A circle on the optical axis in FIG. 15A indicates the polarization direction (for example, S polarization) of the image light Gar, and a bar indicates the polarization direction (for example, P polarization) of the image light Ral and Bal. Further, the circle on the left optical axis from the polarization plane rotating element 14B in FIG. 15B indicates the polarization direction (for example, S polarization) of the image light Gbl, and the bar indicates the polarization direction of the image light Rbr, Bbr (for example, P polarization). ), The bar on the right optical axis from the polarization plane rotating element 14B indicates the polarization direction of the image light Gbl (for example, P-polarization), and the circle indicates the polarization direction of the image light Rbr, Bbr (for example, S-polarization). Show.

  FIG. 16 is a diagram showing the configuration of the second embodiment of the processing systems 86A and 86B. The processing systems 86A and 86B have substantially the same configuration, but the processing system 86A is provided with a λ / 2 phase difference plate 16A in front of the projection lens 12A. The λ / 2 retardation plate 16A has a fast axis (or slow axis) inclined 22.5 degrees counterclockwise with respect to the horizontal axis of the liquid crystal projector, and λ / 2 in the liquid crystal projector. The polarization direction (for example, P-polarized light) of the image light Gar before the phase difference plate is rotated 45 degrees counterclockwise and projected from the projection lens 12A. Similarly, the image lights Ral and Bal are rotated 45 degrees counterclockwise.

  In contrast, the processing system 86B is provided with a λ / 2 phase difference plate 16B in front of the projection lens 12B. The λ / 2 phase difference plate 16B has a fast axis (or slow axis) inclined 22.5 degrees clockwise with respect to the horizontal axis of the liquid crystal projector, and is positioned at λ / 2 in the liquid crystal projector. The polarization direction (for example, P-polarized light) of the image light Gbl before the phase difference plate is rotated 45 degrees clockwise and projected from the projection lens 12B. Similarly, the image lights Rbr and Bbr are rotated 45 degrees counterclockwise. Accordingly, if the polarization direction of the image light Gbl preceding the λ / 2 retardation plate in the liquid crystal projector is horizontal, the relationship between the image light Ral, Gar, Bal and the image light Rbr, Gbl, Bbr shown in FIG. Easy to get.

  FIG. 17 shows a detailed structural diagram of the second embodiment of the processing system. In the figure, the incident S-polarized light or P-polarized white light passes through the integrator 32 constituted by the eyelet lens and then passes through the polarization conversion element 34 so that, for example, the polarization direction is changed to S-polarized light. In the dichroic mirror 36, only the primary color light B is reflected by this light, and the primary color lights R and G are transmitted. Thereafter, the primary color light B reflected by the dichroic mirror 36 is reflected by the mirror 38, and S-polarized image light B is obtained through the lens 39, the liquid crystal display panel 40 of the B image and the λ / 2 plate 41, and the cross type dichroic is obtained. It enters the prism 42.

  The primary color lights R and G that have passed through the dichroic mirror 36 are reflected by the dichroic mirror 44 only, and the primary color light R is transmitted. The primary color light G reflected by the dichroic mirror 44 is obtained as P-polarized image light G through the lens 45 and the G image liquid crystal display panel 46 and is incident on the cross-type dichroic prism 42. The primary color light R transmitted through the dichroic mirror 44 is reflected by the mirrors 48 and 49, and S-polarized image light R is obtained through the lens 50, the liquid crystal display panel 51 of the R image and the λ / 2 plate 53, and the cross type dichroic prism 42. Is incident on.

  The cross-type dichroic prism 42 combines the S-polarized image light B and R and the P-polarized image light G. The combined light passes through the λ / 2 phase difference plate 52 (corresponding to 16A and 16B), and is projected toward the screen from the projection lens 54 (corresponding to 12A and 12B).

  FIG. 18 shows a detailed structural diagram of a modification of the second embodiment of the processing system. In the figure, the same parts as those in FIG. In FIG. 18, incident S-polarized light or P-polarized white light passes through an integrator 32 configured by an eyelet lens, and then passes through a polarization conversion element 34 so that, for example, the polarization direction is changed to S-polarized light. The dichroic mirror 56 reflects the primary color lights G and B and transmits the primary color light R. Thereafter, the primary color light R transmitted through the dichroic mirror 56 is reflected by the mirror 57, and S-polarized image light R is obtained through the lens 58, the liquid crystal display panel 59 of the R image and the λ / 2 plate 65, and the dichroic mirror 60, The light passes through 61 and enters the λ / 2 phase difference plate 52.

  Of the primary color lights G and B reflected by the dichroic mirror 56, only the primary color light G is reflected by the dichroic mirror 62 and the primary color light B is transmitted. The primary color light G reflected by the dichroic mirror 62 passes through the lens 63 and the liquid crystal display panel 64 of the G image, is reflected by the dichroic mirror 60 to obtain P-polarized image light G, and is combined with the image light R. The primary color light B transmitted through the dichroic mirror 62 passes through the lens 68 and the liquid crystal display panel 69 of the B image and the λ / 2 plate 66, and is reflected by the mirror 70 to obtain S-polarized image light B. The dichroic mirror 61 Reflected and combined with the image lights R and G. The combined light passes through the λ / 2 phase difference plate 52 (corresponding to 16A and 16B), and is projected toward the screen from the projection lens 54 (corresponding to 12A and 12B).

  The dichroic mirrors 36, 44, 56, 62 correspond to the color separation means in the claims, the liquid crystal display panels 34, 46, 51, 59, 64, 69 correspond to the image modulation means, and the dichroic mirrors 60, 61, The cross-type dichroic prism 42 corresponds to the combining unit, the liquid crystal projectors 10A and 10B correspond to the first and second projectors, and the processing systems 86A and 86B correspond to the first and second processing systems.

It is a figure which shows the wavelength characteristic of the dichroic prism by the displacement of the incident angle of image light. 1 is an external view of an embodiment of a projector apparatus according to the present invention. It is a figure which shows the polarization direction of image light Ra, Ga, Ba, Rb, Gb, Bb on a screen. It is a figure which shows the structure of 1st Example of a liquid crystal projector. It is a figure which shows the structure of 2nd Example of a liquid crystal projector. It is a figure which shows the structure of 2nd Example of a liquid crystal projector. 1 is an external view of a first embodiment of a projector device of a three-dimensional display system of the present invention. It is a figure which shows the polarization direction of image light Ra, Ga, Ba, Rb, Gb, Bb on the screen of the three-dimensional display system of this invention. It is a figure which shows the structure of 1st Example of a liquid-crystal projector. It is a figure which shows the structure of 2nd Example of a liquid crystal projector. It is a detailed structural diagram of the second embodiment of the liquid crystal projector. It is a detailed structural diagram of a modification of the second embodiment of the liquid crystal projector. It is an external view of 2nd Example of the projector apparatus of the three-dimensional display system of this invention. It is a figure which shows the polarization direction of image light Ra, Ga, Ba, Rb, Gb, Bb on the screen of the three-dimensional display system of this invention. It is a figure which shows the structure of 1st Example of a processing system. It is a figure which shows the structure of 2nd Example of a processing system. It is a detailed structure figure of 2nd Example of a processing system. It is a detailed structure figure of the modification of 2nd Example of a processing system.

Explanation of symbols

10A, 10B Liquid crystal projector 12A, 12B Projection lens 14B Polarization plane rotation element 16A, 16B λ / 2 phase difference plate 20 Screen 30 Light source 32 Integrator 34 Polarization conversion element 36, 44 Dichroic mirror 38, 48, 49 Mirror 39, 45, 50 Lens 40, 46, 51 Liquid crystal display panel 42 Cross type dichroic prism 54 Projection lens 86A, 86B Processing system

Claims (5)

A color separation unit that separates white light into three primary color lights, an image modulation unit that performs image modulation on each of the three primary color lights, and a synthesis unit that combines the three primary color image lights output from the image modulation unit, Having first and second projectors for projecting the composite image light from the synthesizing unit onto a screen from a projection lens;
The combining means of the first projector combines the first image light of the right eye image and the second and third image lights of the left eye image with a cross-type dichroic prism, and polarization of the first image light of the right eye image The direction is orthogonal to the polarization directions of the second and third image lights of the other left-eye images at the time of incidence of the combining means,
The synthesizing means of the second projector combines the first image light of the left eye image and the second and third image lights of the right eye image with a cross-type dichroic prism, and polarization of the first image light of the left eye image The direction of polarization of the second and third image lights of the other right-eye image upon incidence of the combining means and the polarization of the first image light of the right-eye image of the first projector upon incidence on the screen A three-dimensional display system characterized by being orthogonal to the direction. The three-dimensional display system according to claim 1,
The three-dimensional display system characterized in that the first image light is green among the three primary colors. The three-dimensional display system according to claim 1 or 2,
The three-dimensional display system, wherein the second projector is provided with a polarization plane rotating element that rotates the polarization directions of three primary colors of image light by 90 degrees with respect to the first projector. The three-dimensional display system according to claim 1 or 2,
The first projector includes a first retardation plate that rotates the polarization directions of the three primary colors of image light by 45 degrees clockwise or counterclockwise,
3. The three-dimensional display system according to claim 2, wherein the second projector includes a second retardation plate that rotates the polarization directions of the three primary color image lights counterclockwise or clockwise by 45 degrees.   5. The three-dimensional display system according to claim 1, further comprising an integrator configured by a cross-eye lens between the light source and the color separation unit.

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