JP2006053205A - Multi-projection display, projector unit, and electrooptical modulator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a multi-projection display restraining occurrence of a black floating pattern without necessitating a light shielding plate having a complicated mechanism for exactly shielding light projected onto a superposed area or a complicated mechanism for exactly positioning such a light shielding plate. <P>SOLUTION: In the multi-projection display, a plurality of projection images are projected like tiling onto a projection surface in a partially superposed state. In liquid crystal devices 32<SB>RA</SB>, 32<SB>RB</SB>, 32<SB>RC</SB>, 32<SB>RD</SB>, 32<SB>GA</SB>, 32<SB>GB</SB>, 32<SB>GC</SB>, 32<SB>GD</SB>, 32<SB>BA</SB>, 32<SB>BB</SB>, 32<SB>BC</SB>and 32<SB>BD</SB>, an effective pixel area in a 1st area R<SB>1</SB>where the projection image to be projected onto the superposed area is generated is set smaller than that in a 2nd area R<SB>2</SB>where the projection image to be projected onto a non-superposed area is generated. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a multi-projection display, a projector unit, and an electro-optic modulation device.

FIG. 25 is a diagram for explaining the multi-projection display. In this multi-projection display, as shown in FIG. 25, a plurality of projector units PJ _A , PJ _B , PJ _C , and PJ _D are arranged in the horizontal direction and / or the vertical direction, and the plurality of projector units PJ _A , PJ are arranged. _{B, PJ} C, the unit projected image _I a from _{PJ D, I B, I C} , displays one large screen image I by tiling projects an _{I D} on the screen SCR. This multi-projection display can display high-definition and high-brightness images compared to ordinary projectors, so movie theaters, museums, museums, seminar venues, gathering venues, mini theaters, public institutions, companies, etc. It is expected that it will be widely spread in the future in the field of home use such as business field, amusement, and home theater.

Incidentally, it is known that a projector using a liquid crystal device has a problem of so-called “black floating”. FIG. 26 is a diagram for explaining “black float” in a projector using a liquid crystal device.
In a projector PJ using a liquid crystal device, “white” is displayed when an on signal Imax corresponding to white display is given to the liquid crystal device, and “off” when an off signal Imin corresponding to black display is given to the liquid crystal device. “Black” is displayed, and “halftone between white and black” is displayed when a halftone signal corresponding to a halftone between white display and black display is given to the liquid crystal device.

  However, even when an off signal Imin corresponding to black display is given to the liquid crystal device, the liquid crystal device actually does not completely close but slightly transmits light. is there. For this reason, even if it tries to display “true black (black that does not emit any light)” on the screen, it cannot actually display “true black”, as shown in FIG. "Slightly brighter than black" is displayed. This is called “black float”. This “black float” may occur not only in a projector using a liquid crystal device but also in a projector using another electro-optic modulation device.

FIG. 27 is a diagram for explaining the “black floating pattern” in the multi-projection display.
The problem of “black floating pattern” in the multi-projection display is more serious than the problem of “black floating pattern” in the projector described above. That is, in the multi-projection display, for example, even when it is desired to display the entire screen in black, superimposition areas S _AB and S where the projection light from each projector unit PJ _A , PJ _B , PJ _C , and PJ _D is superimposed and projected. _{In AC 1} , S _ABCD , S _BD , and S _CD , projection light related to “black” from the multi-projection display is also superimposed and projected, and as a result, these superimposed regions S _AB , S _AC , S _ABCD , S _{CD BD,} is from being to be recognized is the S _CD is bright pattern. In this application, this is referred to as a “black floating pattern”.

In such a multi-projection display, superimposition areas S _AB , S _AC , S _ABCD , S _BD , S _CD on which projection light from each projector unit PJ _A , PJ _B , PJ _C , PJ _D is superimposed and projected are described. Is known to reduce the amount of light projected from each projector unit PJ _A , PJ _B , PJ _C , and PJ _D so that these areas are not noticeable (see, for example, Patent Document 1). However, since the amount of light projected for “black” display cannot be reduced any further, this technique cannot suppress the occurrence of “black floating pattern”.

FIG. 28 is a diagram for explaining a conventional multi-projection display capable of suppressing the occurrence of such a “black floating pattern”. FIG. 28A is a diagram showing a configuration of a conventional multi-projection display, and FIG. 28B is a diagram showing a structure of a light shielding plate.
In the multi-projection display 900, as shown in FIG. 28A, light shielding plates 910 _A , 910 _B , and 910 _C are disposed between the projector units PJ _A , PJ _B , and PJ _C and the screen SCR. ing. Each of the light shielding plates 910 _A , 910 _B , and 910 _C has a structure as shown in FIG. 28B (see, for example, Patent Document 2).

Therefore, according to the multi-projection display 900, the light shielding plates 910 _A , 910 _B , and the light shielding plates 910 _A , 910 _B , and the like in the superposition regions S _AB , S _BC where the projection light from the projector units PJ _A , PJ _B , PJ _C is superimposed and projected. By the action of 910 _C, the amount of projection light in the projection light that displays “slightly brighter than true black” is reduced, so that the “black floating pattern” occurs in these overlapping regions S _AB and S _BC . It will be suppressed.

JP-A-6-178327 JP 2001-268476 A

  However, in such a conventional multi-projection display, since the projection light from each projector unit is shielded by the light shielding plate, the portion where the projection light from each projector unit is superimposed and projected is accurately shielded. Therefore, there is a problem that a light shielding plate having a complicated mechanism that can be used is required. In addition, such a conventional multi-projection display has a problem that a complicated mechanism for accurately positioning such a light shielding plate is required.

  Therefore, the present invention does not require a light shielding plate having a complicated mechanism for accurately shielding light projected on the overlapping region and a complicated mechanism for accurately positioning such a light shielding plate, An object of the present invention is to provide a multi-projection display capable of suppressing the occurrence of the above-described “black floating pattern”. It is another object of the present invention to provide a projector unit and an electro-optic modulation device that can be suitably used for such a multi-projection display.

(1) A multi-projection display according to the present invention includes a plurality of projector units each having an electro-optic modulation device, and a plurality of projection images projected from the plurality of projector units are partially superimposed on a projection surface. In the multi-projection display that performs tiling projection, in the electro-optic modulation device, the average light transmission rate in the first region that generates the projected image projected on the superimposed region projected in a state where the projected image is superimposed on the projection surface is The projection light image is set to be smaller than the average light transmission rate in the second region for generating the projection image projected on the non-overlapping region projected without being superimposed on the projection surface.

  Therefore, according to the multi-projection display of the present invention, the average light transmission rate in the first region is set smaller than the average light transmission rate in the second region. Since the projection light quantity in the projection light displaying “slightly bright black” is reduced, the occurrence of “black floating pattern” in the overlapping region is suppressed.

  In addition, according to the multi-projection display of the present invention, the occurrence of “black floating pattern” is suppressed by setting the average light passing rate in the first region of the electro-optic modulation device to be smaller than the average light passing rate in the second region. Therefore, there is no need for a light shielding plate having a complicated mechanism for accurately shielding light projected on the overlapping region and a complicated mechanism for accurately positioning such a light shielding plate, The object of the present invention is achieved.

  The multi-projection display of the present invention can be suitably used particularly for a rear projection type multi-projection display. In the rear projection type multi-projection display, the position of the overlapping area on the screen is not greatly shifted after the position of each projector unit is adjusted before shipment. This is because even if the boundary between the two regions is fixed, the boundary position between the first region and the second region on the screen can be optically adjusted after shipment.

(2) In the multi-projection display according to (1), the first area is divided into a plurality of areas in accordance with the number of superimpositions on which the projection image is superimposed on the superposition area, and an average in the plurality of areas The light transmission rate is preferably set according to the number of superimpositions.

  With this configuration, the projection light can be reduced to the same level as the non-overlapping area in the overlapping area, regardless of the number of overlapping areas, and the occurrence of “black floating patterns” can be effectively suppressed. Will be able to. That is, for example, in the region corresponding to the case where the number of superpositions is 2, the average light passage rate is ½ of the average light passage rate in the second region, and for example, in the region corresponding to the case where the number of superpositions is 4, the average If the light transmission rate is set to 1/4 of the average light transmission rate in the second region, the projection light can be reduced to the same level as the non-overlapping region anywhere in the overlapping region. The occurrence of “black float pattern” can be effectively suppressed.

(3) In the multi-projection display described in (2) above, it is preferable that the average light transmission rate in the plurality of regions is set to gradually decrease as the distance from the second region increases.

  With this configuration, in addition to effectively suppressing the occurrence of “black floating pattern”, the boundary between the projected images from each projector unit can be made inconspicuous on the screen. become.

(4) In the multi-projection display according to any one of (1) to (3), an effective pixel area in the first region is set smaller than an effective pixel area in the second region. preferable.

  With this configuration, the effective pixel area in the first region of the electro-optic modulation device is set smaller than the effective pixel area in the second region, so that the average light transmittance in the first region is the average in the second region. It can be made smaller than the light transmission rate. As a result, the amount of projection light in the projection light that displays “black slightly brighter than true black” is reduced in the superimposition area, so that the occurrence of “black floating pattern” in the superposition area is suppressed. .

  When the multi-projection display described in (4) is a multi-projection display having a transmissive liquid crystal device as an electro-optic modulation device, the effective pixel area is preferably an area of a pixel opening. The area of the pixel opening can be adjusted by a black matrix pattern.

  When the multi-projection display described in (4) is a multi-projection display having a reflective liquid crystal device as an electro-optic modulator, the effective pixel area is preferably an area of a reflective electrode. The area of the reflective electrode can be adjusted by the area of the reflective electrode itself, or can be adjusted by a black matrix pattern.

  When the multi-projection display described in (4) is a multi-projection display having a micro-mirror type light modulation device as an electro-optic modulation device, the effective pixel area is preferably the micro-mirror area. The area of the micromirror can be adjusted by the area of the micromirror itself, or can be adjusted by partially forming an opaque member on the micromirror.

(5) In the multi-projection display according to any one of (1) to (3), the light transmittance or light reflectance of each pixel in the first region is the light transmittance of each pixel in the second region. It is preferable that it is set smaller than the rate or the light reflectance.

  By configuring in this way, by setting the light transmittance or light reflectance of each pixel in the first region of the electro-optic modulation device to be smaller than the light transmittance or light reflectance of each pixel in the second region, The average light passage rate in the first region can be set smaller than the average light passage rate in the second region. As a result, the amount of projection light in the projection light that displays “black slightly brighter than true black” is reduced in the superimposition area, so that the occurrence of “black floating pattern” in the superposition area is suppressed. .

  When the multi-projection display described in (5) is a multi-projection display having a transmissive liquid crystal device as an electro-optic modulation device, the light transmittance of each pixel in the first region is set to the light of each pixel in the second region. By setting it smaller than the transmittance, the average light passage rate in the first region can be set smaller than the average light passage rate in the second region.

  When the multi-projection display described in (5) is a multi-projection display having a reflective liquid crystal device as an electro-optic modulator, the light reflectance of the reflective electrode in the first region is set to the light of the reflective electrode in the second region. By setting it smaller than the reflectance, the average light transmission rate in the first region can be set smaller than the average light transmission rate in the second region.

  When the multi-projection display described in (5) is a multi-projection display having a micro-mirror type light modulation device as an electro-optic modulation device, the light reflectance of the micro-mirror in the first region is set to the micro-mirror in the second region. By setting it smaller than the light reflectance, the average light passage rate in the first region can be set smaller than the average light passage rate in the second region.

(6) In the multi-projection display according to the above (5), it is preferable that a semi-transparent member exists on an optical path of light passing through each pixel in the first region.

  With this configuration, since a semi-transparent member is present on the optical path of light passing through each pixel in the first region, the light transmittance or light reflectance of each pixel in the first region. Can be reduced. For this reason, since an electro-optic modulation device having the same structure can be used as the electro-optic modulation device except for the semi-transparent member, an increase in manufacturing cost can be suppressed as much as possible.

  The electro-optic modulation device used for the multi-projection display described in (6) above, for example, sprays a translucent photo-curing resin or ink on the target pixel using an inkjet technique or the like, and then It can be manufactured by irradiating light or drying to cure the photocurable resin or ink to form a semi-translucent member.

(7) In the multi-projection display according to any one of (1) to (3), it is preferable that the pixel density in the first region is set smaller than the pixel density in the second region.

  By configuring in this way, the pixel density in the first region of the electro-optic modulation device is made smaller than the pixel density in the second region, so that the average light transmittance in the first region is changed to the average light transmittance in the second region. Can be set smaller. As a result, the amount of projection light in the projection light that displays “black slightly brighter than true black” is reduced in the superimposition area, so that the occurrence of “black floating pattern” in the superposition area is suppressed. .

(8) In the multi-projection display according to (7), it is preferable that the electro-optic modulation device is formed in a state where pixels in the first region have a pixel density lower than that in the second region.

  By comprising in this way, the average light passage rate in a 1st area | region can be set smaller than the average light passage rate in a 2nd area | region.

(9) In the multi-projection display according to the above (7), the electro-optic modulation device may be connected to a part of the original pixels in the first region (hereinafter referred to as “original pixels”). It is preferable that the pixel density of the first region is set to be small by making light unavailable.

  By configuring in this way, it becomes possible to set the pixel density of the first region to be small by making it impossible to use light from some of the original pixels in the first region. As the electro-optic modulation device used for the projector unit, it is not necessary to use a separate electro-optic modulation device, that is, a general electro-optic modulation device can be commonly used as it is.

  Here, the original pixels in the first region are pixels on the electro-optic modulation device arranged in a normal vertical and horizontal matrix in the first region as in the second region. By making it impossible to use light from some original pixels among the pixels, the pixel density of the first region can be set small.

(10) In the multi-projection display according to (9), there is an opaque member or a light deflecting member on an optical path of light passing through some of the original pixels in the first region. It is preferable.

  With this configuration, since there is an opaque member or a light deflecting member on the optical path of the light passing through some of the original pixels in the first area, the pixel density in the first area is reduced. Can be reduced. For this reason, since an electro-optic modulator having the same structure as the electro-optic modulator in each projector unit can be used except for the light-impermeable member or the light deflecting member, an increase in manufacturing cost can be suppressed as much as possible. .

Note that the electro-optic modulation device used for the multi-projection display described in (10) above sprays light-impermeable photo-curable resin or ink on a target pixel using an inkjet technique or the like, Can be produced by irradiating or drying a photocurable resin or ink to form an opaque material.
Further, in the electro-optic modulation device used for the multi-projection display described in (10) above, the reflection surface of the micromirror is arranged at an angle different from that of the normal reflection surface, or the reflection of these on the reflection surface of the micromirror. It can be manufactured by forming another reflective surface at a different angle from the surface.

(11) In the multi-projection display according to (9), the electro-optic modulation device is a liquid crystal device, and some of the original pixels in the first region are sufficiently separated from a threshold voltage. It is preferable that a light non-transmission state is always established by applying a remote voltage.

  With such a configuration, the pixel density can be reduced corresponding to the first region in the liquid crystal device, and therefore it is necessary to change the position where the first region and the second region in the liquid crystal device are formed after shipment. If this occurs, it can be easily dealt with by appropriately selecting a pixel to which a voltage sufficiently separated from the threshold voltage is applied. Therefore, the multi-projection display described in (11) above can be suitably used not only in the rear projection type multi-projection display but also in the front projection type multi-projection display.

(12) The multi-projection display according to (11) preferably has a function of determining the original pixels of the part in the first region based on a photographing result of the projection plane by the imaging device.

  With this configuration, the projection surface is photographed by the imaging device at the time of adjustment before shipment or after shipment, and some pixels that are always in the light non-transmissive state in the first region are determined based on the photographing result. Will be able to.

(13) A projector unit of the present invention is a projector unit for use in the multi-projection display according to any one of (1) to (12) above.
The electro-optic modulation device is characterized in that an average light passage rate in the first region is set smaller than an average light passage rate in the second region.

  For this reason, by using the projector unit of the present invention for a projector unit of a multi-projection display, a light shielding plate having a complicated mechanism for accurately shielding light projected on the overlapping region and such a light shielding plate can be accurately used. The complicated mechanism for positioning is not required, and the object of the present invention is achieved.

(14) An electro-optic modulation device of the present invention is an electro-optic modulation device for use in the multi-projection display according to any one of (1) to (12) above, and an average light transmission rate in the first region. Is set to be smaller than the average light transmission rate in the second region.

  For this reason, by using the electro-optic modulation device of the present invention for an electro-optic modulation device of a multi-projection display, a light-shielding plate having a complicated mechanism for accurately shielding the light projected on the overlapping region and such light-shielding. The need for a complicated mechanism for accurately positioning the plate is eliminated and the object of the present invention is achieved.

(Embodiment 1)
FIG. 1 is a diagram illustrating a configuration of a multi-projection display according to the first embodiment. Fig.1 (a) is sectional drawing seen from the side, FIG.1 (b) is a front view.

As shown in FIG. 1, the multi-projection display 100 according to the first embodiment includes four projector units 130, 130, 130, and 130 arranged in a housing 102, and these four projector units 130, 130, This is a rear projection type multi-projection display in which unit projection images I _A , I _B , I _C , and _ID are tiling projected onto the screen SCR by 130 and 130.

  An imaging element 142 is provided inside the housing 102. The imaging element 142 uses the range indicated by the broken line on the screen SCR as the imaging range S. The shooting range S can be arbitrarily set. Each projector unit 130 is provided with an optical correction means 154 to enable optical correction of the position and orientation of each projector unit 130 within the housing.

  FIG. 2 is a diagram illustrating an optical system of the projector unit used in the multi-projection display according to the first embodiment. As shown in FIG. 2, each projector unit 130 passes the light source 10, the integrator lenses 12 and 12, the polarization conversion element 14, the superimposing lens 16, and the red light (R) to pass green light (G) and blue light (B ), A dichroic mirror 20 that transmits blue light (R) and reflects green light (G), and a liquid crystal for each color light (red light, green light, and blue light) as an electro-optic conversion device. The devices 32R, 32G, and 32B, the reflection mirror 22 for making red light incident on the liquid crystal device 32R, the two reflection mirrors 24 and 26 for making blue light incident on the liquid crystal device 32B, the dichroic mirror 20 and the reflection mirror 24 A lens 28 disposed between them, a lens 30 disposed between the reflecting mirror 24 and the reflecting mirror 26, and the liquid crystal devices 32R, 32G, and 32B. Polarizers 34, 34 provided on each of the entrance side and the exit side, and has a projection lens 38 as a cross dichroic prism 36 and the projection optical system as a color synthesizing optical system.

  FIG. 3 is a block diagram for explaining the multi-projection display according to the first embodiment. As shown in FIG. 3, the multi-projection display 100 according to the first embodiment includes an image signal receiving unit 160 that receives an image signal from a TV antenna, a DVD player, or the like, and an adjustment image information storage unit that stores adjustment image information. 162, a plurality of projector units 130, 130, 130, and 130 that project a projected image, a control unit 110 that performs various controls including driving of these projector units, and correction parameters that are used when correcting unit images. A correction parameter storage unit 152 that performs the imaging, and an imaging device 140 that performs imaging of the projection plane.

  The control unit 110 receives the original image information from the image signal receiving unit 160 and the adjustment image information from the adjustment image information storage unit 162, and generates a unit image information related to the unit image projected by each projector unit 130. An image information generation unit 120, a unit image information correction unit 150 that corrects unit image information based on the imaging result of the imaging device 140, and an image processing unit 146 that performs image processing on a digital signal from the AD conversion element 144 of the imaging device 140. have.

  The unit image information generation unit 120 has a function of generating unit image information corresponding to each of the plurality of projector units 130, 130, 130, and 130 based on the original image information and a plurality of projector units based on the original adjustment image information. 130, 130, 130, and 130. The unit image information for adjustment corresponding to each of 130, 130, 130, and 130 is generated.

  The imaging device 140 includes an imaging element 142 that captures a predetermined area of the adjustment image projected on the screen SCR, and an AD conversion element 144 that converts an analog signal from the imaging element 142 into a digital signal.

  The image processing unit 146 has a function of performing image processing on the imaging result of the imaging device 140, comparing it with original adjustment image information, and outputting the result to the unit image information correction unit 150. Yes.

  The adjustment image information storage unit 162 has a function of storing information relating to an adjustment image to be imaged by the imaging device 140 when the unit image information is corrected.

The unit image information correction unit 150 includes a boundary (overlapping region) between unit images projected by adjacent projector units among the plurality of projector units 130, 130, 130, 130 based on the photographing result of the imaging device 140. ) Has a function of correcting the unit image information so that it does not stand out on the screen SCR.
The unit image information correction unit 150 compares the overall adjustment image formed by the four adjustment unit image information projected by the four projector units 130, 130, 130, and 130 with the original adjustment image information. A function for correcting the shape, position, and tilt of the unit image projected by each projector unit 130, a function for correcting the brightness and color tone of the unit image projected by each projector unit 130, and a superimposing region It has a brightness adjustment function for making the brightness uniform with the brightness in the non-overlapping area.

  With these correction processes, the boundary due to the inappropriate shape, position and inclination between the projected images from the projector units 130 can be made inconspicuous on the screen SCR. It is possible to make the boundary due to the discontinuity of the brightness and color between the projected images from 130 inconspicuous on the screen SCR.

  The correction parameter storage unit 152 has a function of storing correction parameters determined when the unit image information correction unit 150 corrects the unit image information.

  4 to 7 are diagrams for explaining functions of the unit image information correction unit in the multi-projection display according to the first embodiment.

First, the display state before adjustment will be described. When the original image information from the image signal receiving unit 160 is input to the unit image information generating unit 120, the unit image information generating unit 120 generates unit image information corresponding to each projector unit 130 based on the original image information. Each projector unit 130 projects a unit image corresponding to the unit image information on the screen SCR. At this time, since the multi-projection display 100 is in a stage before adjustment, a distorted projection image (I _A0 , I _B0 , I _C0 , I _D0 ) as shown in FIG. _4I is projected.

Here, when the original adjustment image information from the adjustment image information storage unit 162 is input to the unit image information generation unit 120, the unit image information generation unit 120 adjusts the unit image information for adjustment based on the original adjustment image information. Is generated. Each projector unit 130 projects a unit image corresponding to the adjustment unit image information on the screen SCR. Accordingly, at this time, since the multi-projection display 100 is in a stage before adjustment, similarly to the above, a distorted projection image (I _A0 , I _B0 , I _C0 , I _D0 ) as shown in FIG. Projected.

Next, a predetermined region of each projection image (I _A0 , I _B0 , I _C0 , I _D0 ) related to the adjustment image shown in FIG. Thereafter, the optical correction unit 154 (see FIG. 1A) performs optical correction on the position and orientation of each projector unit 130 based on the photographing result.

When the original adjustment image information from the adjustment image information storage unit 162 is input again to the unit image information generation unit 120, each projector unit 130 generates an adjustment unit image generated based on the original adjustment image information. The unit image corresponding to the information is projected on the screen SCR. At this time, in the multi-projection display 100, the position and orientation of each projector unit 130 are corrected based on the previous photographing result. On the screen SCR, projection images (I _A1 , I _B1 , I _C1 , I _D1 ) with reduced distortion are projected as shown in FIG. 4 (ii).

Next, each projection image (I _A1 , I _B1 , I _C1 , I _D1 ) related to the adjustment image shown in FIG. Thereafter, the unit image information correction unit 150 determines a correction parameter to be used when correcting the unit image information based on the photographing result. Then, the determined correction parameter is stored in the correction parameter storage unit 152. After that, a plurality of unit image information is generated from the original image information based on the correction parameter.

  Thus, when the original image information from the image signal receiving unit 160 is input to the unit image information generation unit 120, the unit image information generation unit 120 generates unit image information based on the original image information. At this time, the unit image information is corrected by the correction parameter, and corrected unit image information is generated.

Therefore, each projector unit 130 projects a unit image corresponding to the corrected unit image information on the screen SCR. At this time, since the multi-projection display 100 has already been adjusted, the projection images (I _A2 , I _B2 , I _C2 , I _D2 ) from each projector unit 130 are accurately positioned as shown in FIG. 4 (iii). Will be matched.

FIG. 5 shows luminance correction processing by the unit image information correction unit in the multi-projection display according to the first embodiment. Here, in order to simplify the description, a case will be described in which the luminance adjustment of an overlapping portion caused by two adjacent projector units (referred to as PJ _A and PJ _B ) is performed.

First, it is assumed that projected images I _A2 and I _B2 (projected images after shape correction has already been performed) from adjacent projector units PJ _A and PJ _B are projected with an overlapping portion. In this case, the projection image I _A2 from the projector unit PJ _A shown in FIG. 5A and the projection image I _B2 from the projector unit PJ _B shown in FIG. In FIG. 5B, it is assumed that the broken line a1 and the solid line b1, the broken line a2 and the broken line b2, and the solid line a3 and the broken line b3 on the projected images I _A2 and I _B2 overlap each other.

In such overlapping portions of the projected images, a function is used such that the sum of output values from the projector units PJ _A and PJ _B is 1, as shown in FIGS. 5 (c) and 5 (d). However, since the outputs from the projector units PJ _A and PJ _B are γ-corrected, it is necessary to consider them.

For example, when the pixel value of each color of RGB is represented by 8 bits, the pixel value of each color takes a value of 0 to 255 as shown in FIG. Since each projector unit PJ _A and PJ _B is subjected to γ correction, the relationship between the pixel value and the output value is as shown in FIG. Therefore, in consideration of this γ correction, in order for the output values from the projector units PJ _A and PJ _B to be 1 in the overlapping portion, in practice, FIG. 6B and FIG. It is necessary to correct the pixel value using a function such as

FIG. 7 shows the luminance distribution on the screen. FIGS. 7A and 7B are projection images from the two projector units PJ _A and PJ _B , and the luminance distribution in the portion of the horizontal line c is shown in FIGS. 7C and 7D. . As shown in FIGS. 7C and 7D, the luminance of the projected image projected from the projector units PJ _A and PJ _B onto the screen SCR is high due to the influence of the projection lens and the light source. The lower the distance from the center.

The curve shown by the solid line in FIG. 7 (e) is the design of the luminance on the horizontal line c on the screen when the projected images from the two projector units PJ _A and PJ _B are projected by tiling with overlapping portions. It is an example of a value. In this manner, the output values of the two projector units PJ _A and PJ _B are corrected so that the overlapping portion has a curve indicated by a solid line.

  FIG. 8 is a view for explaining the liquid crystal device used in the multi-projection display according to the first embodiment. FIG. 8A is a diagram for explaining the overlapping region and the non-overlapping region on the screen, and FIG. 8B is a diagram for explaining the first region and the second region in the liquid crystal device. .

When tiling projection with unit projection images I _A , I _B , I _C , and _ID partially superimposed on the screen SCR by the four projector units 130, 130, 130, 130 is projected on the screen SCR. As shown in FIG. 8A, each of the unit projected images I _A , I _B , I _C , and _ID is superimposed region S ₁ projected in a state where the projected images are superimposed (superimposed region S _{AB in} FIG. 11). _{, S AC, S ABCD, S} BD, S CD reference.) and non-overlapping region _S a of the non-overlapping region _{S 2} (Figure 11 the projection image is projected in a state that is not superimposed on the projection _{surface, S B,} S _C, (See _SD ). Correspondingly, the multi-projection display 100 according to the first embodiment, as the electro-optical modulator, as shown in FIG. 8 (b), 3 sheets of liquid crystal device to project the unit projected image I _A 32R _A , _{32G a,} 32B a, the unit three liquid crystal devices _32R B of for projecting a projection image _{I B, 32G B, 32B B} , 3 sheets of liquid crystal device to project the unit projected image _{I C 32R C,} 32G _C , 32B _C and three liquid crystal devices 32R _D , 32G _D , 32B _D for projecting the unit projected image _ID are provided. Each liquid crystal device, and a second region R ₂ that generates a projection image to be projected to the first region R ₁ that generates a projection image to be projected to the overlapping area S ₁ in the non-overlapping region S _2.

  9 and 10 are views for explaining the liquid crystal device used in the multi-projection display according to the first embodiment. FIG. 10A is a diagram illustrating a first region and a second region in the liquid crystal device, and FIG. 10B is a diagram illustrating a state in which light passes through the first region and the second region in the liquid crystal device. FIG. 11 is a diagram for explaining the effect of the multi-projection display according to the first embodiment.

In the liquid crystal devices 32R _A , 32R _B , 32R _C , 32R _D , 32G _A , 32G _B , 32G _C , 32G _D , 32B _A , 32B _B , 32B _C , 32B _D used in the multi-projection display 100 according to the first embodiment as shown in FIG. 9, the effective pixel area in the first region R ₁ is set smaller than the effective pixel area in the second region R _2.

For this reason, according to the multi-projection display 100 according to the first embodiment, the effective pixel area in the first region R ₁ is set smaller than the effective pixel area in the second region R ₂ , and as shown in FIG. In addition, the average light transmission rate in the first region R ₁ is smaller than the average light transmission rate in the second region R ₂ . As a result, in the superimposition areas S _AB , S _AC , S _ABCD , S _BD , S _CD (see FIG. 11), the amount of projection light in the projection light displaying “slightly brighter than true black” is reduced. Therefore, as shown in FIG. 11, the occurrence of a “black floating pattern” in the overlapping regions S _AB , S _AC , S _ABCD , S _BD , S _CD is suppressed (see FIG. 27 as a comparative example). .

Further, according to the multi-projection display 100 according to the first embodiment, the “black floating pattern” is formed by setting the effective pixel area in the first region R ₁ of the liquid crystal device smaller than the effective pixel area in the second region R ₂ . since was possible to suppress the occurrence, overlapping area _{S AB, S AC, S ABCD} , S BD, the light shielding plate and the light shielding plate having a complicated mechanism for accurately shield light to be projected to the _{S CD} There is no need for a complicated mechanism for accurate positioning.

The multi-projection display 100 according to Embodiment 1 can be suitably used particularly for a rear projection type multi-projection display. In the rear projection type multi-projection display, for does not largely deviated position of the overlapping area on the screen after the position adjustment of the respective projector units before shipping, and the first region R ₁ on the liquid crystal device the be boundary fixed between 2 region R _2, because it is possible to adjust the boundary position between the first region R ₁ on the screen and the second region R ₂ after shipping optically.

In the multi-projection display 100 according to the first embodiment, as illustrated in FIG. 10, the first region R ₁ includes a plurality of regions R ₁ (2) according to the number of superimposed images on which the projection image is superimposed on the superimposed region S _1. , R ₁ (4), and the average light transmittance in the plurality of regions R ₁ (2), R ₁ (4) is set in accordance with the number of superpositions (2 or 4). In this case, as shown in FIG. 10B, in the region R ₁ (2) corresponding to the case where the number of superpositions is 2, the average light transmission rate is ½ of the average light transmission rate in the second region R ₂ . In the region R ₁ (4) corresponding to the case where the number of superpositions is 4, the average light transmission rate is set to ¼ of the average light transmission rate in the second region R ₂ .

As a result, in the overlapping region S ₁ (S _AB , S _AC , S _ABCD , S _BD , S _CD ), the non-overlapping region S ₂ (S _A , S _B , S _C ) is used regardless of the number of overlapping (2 or 4). , S _D ), the projection light can be lowered to the same level as shown in FIG. 11, and the occurrence of “black floating pattern” can be effectively suppressed as shown in FIG. For this reason, it becomes possible to reduce the projection light to the same level as in the non-overlapping area S ₂ anywhere in the overlapping area S ₁ , and the occurrence of “black floating pattern” can be effectively suppressed.

  In the multi-projection display 100 according to the first embodiment, the effective pixel area is the area of the pixel opening. The area of the pixel opening can be adjusted by a black matrix pattern.

(Embodiment 2)
FIG. 12 is a diagram for explaining the liquid crystal device used in the multi-projection display according to the second embodiment.
A multi-projection display 100a (not shown) according to the second embodiment is different from the multi-projection display 100 according to the first embodiment in the structure of a liquid crystal device used as an electro-optic modulation device.

In other words, (not shown.) Multi-projection display 100a according to the second embodiment the liquid crystal device used in the _{40R A, 40R B, 40R C} , 40R D (40G A, 40G B, 40G C, 40G D, 40B A, 40B B , _40B C, in the 40B _D), as shown in FIG. 12, a plurality of regions in the first region _{R 1} region _R 1 (2) (FIG. 10 _{(a), R} 1 (4) reference.) effective in pixel area is set to gradually decrease as the distance from the second region R _2.

As described above, in the multi-projection display 100a according to the second embodiment, the structure of the liquid crystal device used as the electro-optic modulation device is different from that of the multi-projection display 100 according to the first embodiment. as in the case of the multi-projection display 100, the effective pixel area in the first region R ₁ is set smaller than the effective pixel area in the second region R _2. For this reason, the average light transmission rate in the first region R ₁ is smaller than the average light transmission rate in the second region R _2, and as a result, the same effect as in the case of the multi-projection display 100 according to the first embodiment is obtained.

  In other words, the “black floating pattern” without the need for a light shielding plate having a complicated mechanism for accurately shielding the light projected on the overlapping region and a complicated mechanism for accurately positioning such a light shielding plate Can be suppressed.

Further, according to the multi-projection display 100a according to the second embodiment, since it is set so as to gradually become smaller in accordance with the effective pixel area in a plurality of regions in the first region R ₁ is separated from the second region R _2, In addition to being able to effectively suppress the occurrence of the “black floating pattern”, the boundary between the projected images from each projector unit can be made inconspicuous on the screen.

(Embodiment 3)
FIG. 13 is a diagram for explaining a liquid crystal device used in the multi-projection display according to the third embodiment.
A multi-projection display 100b (not shown) according to the third embodiment is different from the multi-projection display 100 according to the first embodiment in the structure of a liquid crystal device used as an electro-optic modulation device.

That is, the liquid crystal devices 42R _A , 42R _B , 42R _C , 42R _D (42G _A , 42G _B , 42G _C , 42G _D , 42B _A , 42B _{B B} ) used for the multi-projection display 100b (not shown) according to the third embodiment. , 42B _C , 42B _D ), as shown in FIG. 13, the area of each pixel opening in the first region R ₁ and the area of each pixel opening in the second region R ₂ are set to be the same. In addition, the light transmittance of each pixel in the first region R ₁ is set to be smaller than the light transmittance of each pixel in the second region R ₂ .

As described above, the multi-projection display 100b according to the third embodiment differs from the multi-projection display 100 according to the first embodiment in the structure of the liquid crystal device used as the electro-optic modulation device, but in the first region R ₁ . light transmittance of each pixel is set to be smaller than the light transmittance of each pixel in the second region R _2. For this reason, the average light transmission rate in the first region R ₁ is smaller than the average light transmission rate in the second region R _2, and as a result, the same effect as in the case of the multi-projection display 100 according to the first embodiment is obtained.

  In other words, the “black floating pattern” without the need for a light shielding plate having a complicated mechanism for accurately shielding the light projected on the overlapping region and a complicated mechanism for accurately positioning such a light shielding plate Can be suppressed.

In the multi-projection display 100b according to the third embodiment, each pixel in the first region R ₁ is covered with translucent member. Thus, it is possible to reduce the light transmittance of each pixel in the first region R ₁ by covering each pixel in the first region R ₁ of the liquid crystal device in semitransparent member. For this reason, since a liquid crystal device having the same structure can be used as the liquid crystal device except for the semi-transparent member, an increase in manufacturing cost can be suppressed as much as possible.

(Embodiment 4)
FIG. 14 is a diagram for explaining a liquid crystal device used in the multi-projection display according to the fourth embodiment.
A multi-projection display 100c (not shown) according to the fourth embodiment is different from the multi-projection display 100b according to the third embodiment in the structure of a liquid crystal device used as an electro-optic modulation device.

In other words, (not shown.) Multi-projection display 100c according to a fourth embodiment the liquid crystal device used in the _{44R A, 44R B, 44R C} , 44R D (44G A, 44G B, 44G C, 44G D, 44B A, 44B B , _44B C, in the 44B _D), as shown in FIG. 14, a plurality of regions in the first region _{R 1} region _R 1 (2) in (FIG. 10 _(a), the respective in _R 1 (4) reference.) are set so as to gradually decreases as the light transmittance of the pixel is away from the second region R _2.

As described above, in the multi-projection display 100c according to the fourth embodiment, the structure of the liquid crystal device used as the electro-optic modulation device is different from that of the multi-projection display 100b according to the third embodiment. as with the multi-projection display 100b, the light transmittance of each pixel in the first region R ₁ is set to be smaller than the light transmittance of each pixel in the second region R _2. For this reason, the average light transmission rate in the first region R ₁ becomes smaller than the average light transmission rate in the second region R _2, and as a result, the same effect as in the case of the multi-projection display 100 b according to the third embodiment is obtained.

  In other words, the “black floating pattern” without the need for a light shielding plate having a complicated mechanism for accurately shielding the light projected on the overlapping region and a complicated mechanism for accurately positioning such a light shielding plate Can be suppressed.

Further, according to the multi-projection display 100c according to the fourth embodiment, the light transmittance of each pixel in a plurality of regions in the first region R ₁ is set to be gradually reduced as the distance from the second region R ₂ Therefore, the occurrence of “black floating pattern” can be effectively suppressed, and the boundary between the projected images from the projector units can be made inconspicuous on the screen.

(Embodiment 5)
FIG. 15 is a diagram for explaining a liquid crystal device used in the multi-projection display according to the fifth embodiment.
A multi-projection display 100d (not shown) according to the fifth embodiment is different from the multi-projection display 100 according to the first embodiment in the structure of a liquid crystal device used as an electro-optic modulation device.

That is, the liquid crystal devices 46R _A , 46R _B , 46R _C , 46R _D (46G _A , 46G _B , 46G _C , 46G _D , 46B _A , 46B _{B B} used for the multi-projection display 100d (not shown) according to the fifth embodiment. , 46B _C , 46B _D ), as shown in FIG. 15, the area of each pixel opening in the first region R ₁ and the area of each pixel opening in the second region R ₂ are set to be the same, While the light transmittance of each pixel in the first region R ₁ and the light transmittance of each pixel in the second region R ₂ are set to be the same, the density of the pixels in the first region R ₁ is the second region R 1. ₂ is set to be smaller than the pixel density in FIG.

As described above, in the multi-projection display 100d according to the fifth embodiment, the structure of the liquid crystal device used as the electro-optic modulation device is different from that of the multi-projection display 100 according to the first embodiment, but the first region R ₁ the density of the pixel is set smaller than the density of the pixel in the second region R ₂ in. For this reason, the average light transmission rate in the first region R ₁ is smaller than the average light transmission rate in the second region R _2, and as a result, the same effect as in the case of the multi-projection display 100 according to the first embodiment is obtained.

  In other words, the “black floating pattern” without the need for a light shielding plate having a complicated mechanism for accurately shielding the light projected on the overlapping region and a complicated mechanism for accurately positioning such a light shielding plate Can be suppressed.

(Embodiment 6)
FIG. 16 is a diagram for explaining a liquid crystal device used in the multi-projection display according to the sixth embodiment.
A multi-projection display 100e (not shown) according to the sixth embodiment is different from the multi-projection display 100d according to the fifth embodiment in the structure of a liquid crystal device used as an electro-optic modulation device.

In other words, (not shown.) Multi-projection display 100e according to a sixth embodiment a liquid crystal device used in the _{48R A, 48R B, 48R C} , 48R D (48G A, 48G B, 48G C, 48G D, 48B A, 48B B , _48B C, in the 48B _D), as shown in FIG. 16, a plurality of regions in the first region _{R 1} region _R 1 (2) (FIG. 10 _{(a), R} 1 (4) reference.) pixels in density of is set to be gradually reduced as the distance from the second region R _2.

As described above, in the multi-projection display 100e according to the sixth embodiment, the structure of the liquid crystal device used as the electro-optic modulation device is different from that of the multi-projection display 100d according to the fifth embodiment. as with the multi-projection display 100d, the density of the pixels in the first region R ₁ is set to be smaller than the density of the pixel in the second region R _2. For this reason, the average light transmission rate in the first region R ₁ becomes smaller than the average light transmission rate in the second region R _2, and as a result, the same effect as that of the multi-projection display 100 d according to the fifth embodiment is obtained.

  In other words, the “black floating pattern” without the need for a light shielding plate having a complicated mechanism for accurately shielding the light projected on the overlapping region and a complicated mechanism for accurately positioning such a light shielding plate Can be suppressed.

Further, according to the multi-projection display 100e according to the sixth embodiment, since it is set so as to gradually decreases as the density of pixels in a plurality of regions in the first region R ₁ is separated from the second region R _2, In addition to being able to effectively suppress the occurrence of the “black floating pattern”, the boundary between the projected images from each projector unit can be made inconspicuous on the screen.

  In the multi-projection displays 100d and 100e according to the fifth or sixth embodiment, the density of pixels can be adjusted by appropriately changing the black matrix pattern.

(Embodiment 7)
FIG. 17 is a diagram for explaining a liquid crystal device used in the multi-projection display according to the seventh embodiment.
A multi-projection display 100f (not shown) according to the seventh embodiment is different from the multi-projection display 100d according to the fifth embodiment in the structure of a liquid crystal device used as an electro-optic modulation device.

That is, the liquid crystal device _50R A used in the multi-projection display 100f (not shown.) According to the embodiment _{7, 50R B, 50R C,} 50R D (50G A, 50G B, 50G C, 50G D, 50B A, 50B B , 50B _C , 50B _D ), the pixel density of the first region is set to be small by covering some of the original pixels in the first region R ₁ with an opaque member. .

Thus, in the multi-projection display 100f according to the seventh embodiment, the structure of the liquid crystal device used as the electro-optic modulation device is different from that of the multi-projection display 100d according to the fifth embodiment, but the first region R ₁ the density of pixels (effective pixels) is set smaller than the density of the pixel in the second region R ₂ in. For this reason, the average light transmission rate in the first region R ₁ becomes smaller than the average light transmission rate in the second region R _2, and as a result, the same effect as that of the multi-projection display 100 d according to the fifth embodiment is obtained.

  In other words, the “black floating pattern” without the need for a light shielding plate having a complicated mechanism for accurately shielding the light projected on the overlapping region and a complicated mechanism for accurately positioning such a light shielding plate Can be suppressed.

Further, embodiments according to the multi-projection display 100f according to the seventh pixel in the first region R ₁ by originally covering the pixel opaque member of some of the original pixels in the first region R ₁ of the liquid crystal device The density of can be reduced. For this reason, it is not necessary to use separate liquid crystal devices as the liquid crystal devices in each projector unit, that is, a common liquid crystal device can be commonly used as it is, and an increase in manufacturing cost is suppressed as much as possible. be able to.

  Note that the liquid crystal device used for the multi-projection display 100f according to the seventh embodiment sprays light-impermeable photo-curable resin or ink onto a target pixel using an inkjet technique or the like, and then irradiates light. Or by drying and curing the photocurable resin or ink to obtain a light-impermeable member.

(Embodiment 8)
FIG. 18 is a diagram for explaining a liquid crystal device used in the multi-projection display according to the eighth embodiment.
A multi-projection display 100g (not shown) according to the eighth embodiment is different from the multi-projection display 100f according to the seventh embodiment in the structure of a liquid crystal device used as an electro-optic modulation device.

That is, the liquid crystal devices 52R _A , 52R _B , 52R _C , 52R _D (52G _A , 52G _B , 52G _C , 52G _D , 52B _A , 52B _{B B} used for the multi-projection display 100g (not shown) according to the eighth embodiment. , _52B C, in the 52B _D), as shown in FIG. 18, a plurality of regions in the first region _{R 1} region _R 1 (2) (FIG. 10 _{(a), R} 1 (4) reference.) pixels in density of is set to be gradually reduced as the distance from the second region R _2.

As described above, in the multi-projection display 100g according to the eighth embodiment, the structure of the liquid crystal device used as the electro-optic modulation device is different from that of the multi-projection display 100f according to the seventh embodiment. as with the multi-projection display 100f, the density of the pixels in the first region R ₁ is set to be smaller than the density of the pixel in the second region R _2. For this reason, the average light transmission rate in the first region R ₁ is smaller than the average light transmission rate in the second region R _2, and as a result, the same effect as that of the multi-projection display 100 f according to the seventh embodiment is obtained.

  In other words, the “black floating pattern” without the need for a light shielding plate having a complicated mechanism for accurately shielding the light projected on the overlapping region and a complicated mechanism for accurately positioning such a light shielding plate Can be suppressed.

Further, according to the multi-projection display 100g according to the eighth embodiment, since it is set so as to gradually decreases as the density of pixels in a plurality of regions in the first region R ₁ is separated from the second region R _2, In addition to being able to effectively suppress the occurrence of the “black floating pattern”, the boundary between the projected images from each projector unit can be made inconspicuous on the screen.

(Embodiment 9)
FIG. 19 is a diagram for explaining a liquid crystal device used in the multi-projection display according to the ninth embodiment.
A multi-projection display 100h (not shown) according to the ninth embodiment is different from the multi-projection display 100f according to the seventh embodiment in the structure of a liquid crystal device used as an electro-optic modulation device.

In other words, (not shown.) Multi-projection display 100h according to the embodiment 9 the liquid crystal device used in the _{54R A, 54R B, 54R C} , 54R D (54G A, 54G B, 54G C, 54G D, 54B A, 54B B , 54B _C , 54B _D ), some of the plurality of pixels in the first region R ₁ are always in a light non-transmissive state by applying a voltage sufficiently separated from the threshold voltage. Yes.

Thus, in the multi-projection display 100h according to the ninth embodiment, the structure of the liquid crystal device used as the electro-optic modulation device is different from that of the multi-projection display 100f according to the seventh embodiment, but the first region R ₁ the density of the pixel is set smaller than the density of the pixel in the second region R ₂ in. For this reason, the average light transmission rate in the first region R ₁ is smaller than the average light transmission rate in the second region R _2, and as a result, the same effect as that of the multi-projection display 100 f according to the seventh embodiment is obtained.

  In other words, the “black floating pattern” without the need for a light shielding plate having a complicated mechanism for accurately shielding the light projected on the overlapping region and a complicated mechanism for accurately positioning such a light shielding plate Can be suppressed.

In the multi-projection display 100h according to the embodiment 9, since it is possible to lower the density of the pixels corresponding to the first region R ₁ in the liquid crystal device, the first region R ₁ of the liquid crystal device after shipment second region R ₂ and even if the need to change the position to be formed occurs can easily be dealt with by re appropriately selecting a pixel is sufficiently distant voltage from the threshold voltage is applied. Therefore, the multi-projection display 100h according to Embodiment 9 can be suitably used not only in the rear projection type multi-projection display but also in the front projection type multi-projection display.

In the multi-projection display 100h according to the embodiment 9, based on the imaging result of the projection surface by the image pickup device has a function of determining a portion of the pixels in the first region R _1. Therefore, it is the time of adjustment after shipment before or shipment by photographing the projection surface by the imaging device, to accurately determine the portion of the pixel that are always a light non-transmissive state in the first region R ₁ on the basis of the imaging result Can do.

(Embodiment 10)
FIG. 20 is a diagram for explaining the liquid crystal device used in the multi-projection display according to the tenth embodiment.
A multi-projection display 100i (not shown) according to the tenth embodiment is different from the multi-projection display 100h according to the ninth embodiment in the structure of a liquid crystal device used as an electro-optic modulation device.

In other words, (not shown.) Multi-projection display 100i according to the embodiment 10 the liquid crystal device used in the _{56R A, 56R B, 56R C} , 56R D (56G A, 56G B, 56G C, 56G D, 56B A, 56B B , _56B C, in the 56B _D), as shown in FIG. 20, a plurality of regions in the first region _{R 1} region _R 1 (2) (FIG. 10 _{(a), R} 1 (4) reference.) pixels in density of is set to be gradually reduced as the distance from the second region R _2.

As described above, in the multi-projection display 100i according to the tenth embodiment, the structure of the liquid crystal device used as the electro-optic modulation device is different from that of the multi-projection display 100h according to the ninth embodiment. as with the multi-projection display 100h, the density of pixels in the first region R ₁ is set to be smaller than the density of the pixel in the second region R _2. For this reason, the average light transmission rate in the first region R ₁ becomes smaller than the average light transmission rate in the second region R _2, and as a result, the same effect as that of the multi-projection display 100 h according to the ninth embodiment is obtained.

  In other words, the “black floating pattern” without the need for a light shielding plate having a complicated mechanism for accurately shielding the light projected on the overlapping region and a complicated mechanism for accurately positioning such a light shielding plate Can be suppressed.

Further, according to the multi-projection display 100i according to the embodiment 10, since it is set so as to gradually decreases as the density of pixels in a plurality of regions in the first region R ₁ is separated from the second region R _2, In addition to being able to effectively suppress the occurrence of the “black floating pattern”, the boundary between the projected images from each projector unit can be made inconspicuous on the screen.

(Embodiment 11)
FIG. 21 is a diagram illustrating an optical system of a projector unit used in the multi-projection display according to the eleventh embodiment.
A multi-projection display 100j (not shown) according to the eleventh embodiment is different from the multi-projection display 100 according to the first embodiment in the structure of the projector unit, as shown in FIG.

  That is, in the projector unit used for the multi-projection display 100j (not shown) according to the eleventh embodiment, the solid light sources 70R, 70G, and 70B made of LEDs are used as the light sources.

As described above, in the multi-projection display 100j according to the eleventh embodiment, the structure of the projector unit is different from that of the multi-projection display 100 according to the first embodiment, but in the case of the multi-projection display 100 according to the first embodiment. In the same manner as the electro-optic modulation device, since the effective pixel area in the first region R ₁ is set to be smaller than the effective pixel area in the second region R ₂ , the multi-optical device according to the first embodiment is provided. The same effect as that of the projection display 100 is obtained.

  In other words, the “black floating pattern” without the need for a light shielding plate having a complicated mechanism for accurately shielding the light projected on the overlapping region and a complicated mechanism for accurately positioning such a light shielding plate Can be suppressed.

Embodiment 12
FIG. 22 is a diagram for explaining the multi-projection display according to the twelfth embodiment.
A multi-projection display 100k (not shown) according to the twelfth embodiment is different from the multi-projection display 100 according to the first embodiment in that it is a front projection multi-projection display as shown in FIG.

As described above, the multi-projection display 100k according to the twelfth embodiment is different from the multi-projection display 100 according to the first embodiment in that it is a front projection multi-projection display, but the multi-projection display 100 according to the first embodiment. As in the case of FIG. 5, since the electro-optic modulator has a liquid crystal device in which the effective pixel area in the first region R ₁ is set smaller than the effective pixel area in the second region R ₂ , The same effect as that of the multi-projection display 100 is obtained.

  In other words, the “black floating pattern” without the need for a light shielding plate having a complicated mechanism for accurately shielding the light projected on the overlapping region and a complicated mechanism for accurately positioning such a light shielding plate Can be suppressed.

(Embodiment 13)
FIG. 23 is a diagram for explaining the multi-projection display according to the thirteenth embodiment.
The multi-projection display 100l (not shown) according to the thirteenth embodiment is different from the multi-projection display 100 according to the first embodiment in the type of the electro-optic modulation device. In other words, the electro-optical modulator is used in the multi-projection display 100l according to the embodiment 13, the reflection-type liquid crystal device _58R A _{of, 58R B, 58R C, 58R} D (58G A, 58G B, 58G C, 58G D, 58B A , 58B _B , 58B _C , 58B _D ).

As described above, the multi-projection display 100l according to the thirteenth embodiment is different from the multi-projection display 100 according to the first embodiment in that a reflective liquid crystal device is used as the electro-optic modulation device. as shown, the area of the reflective electrode in the first region R ₁ is set smaller than the area of the reflection electrode in the second region R _2. For this reason, the average light transmission rate in the first region R ₁ is smaller than the average light transmission rate in the second region R _2, and as a result, the same effect as in the case of the multi-projection display 100 according to the first embodiment is obtained.

  In other words, the “black floating pattern” without the need for a light shielding plate having a complicated mechanism for accurately shielding the light projected on the overlapping region and a complicated mechanism for accurately positioning such a light shielding plate Can be suppressed.

  The area of the reflective electrode can be adjusted by the area of the reflective electrode itself, or can be adjusted by a black matrix pattern.

(Embodiment 14)
FIG. 24 is a diagram for explaining the multi-projection display according to the fourteenth embodiment.
The multi-projection display 100m (not shown) according to the fourteenth embodiment is different from the multi-projection display 100 according to the first embodiment in the type of the electro-optic modulation device. In other words, the electro-optical modulator is used in the multi-projection display 100m according to the embodiment 14 (not shown.), The micro-mirror type optical modulator _{60R A, 60R B, 60R C} , 60R D (60G A, 60G B, 60G _C , 60G _D , 60B _A , 60B _B , 60B _C , 60B _D ).

As described above, the multi-projection display 100m according to the fourteenth embodiment is different from the multi-projection display 100 according to the first embodiment in that a micromirror light modulation device is used as the electro-optic modulation device. as shown in the area of the micromirror in the first region R ₁ is set smaller than the area of the micromirror in the second region R _2. For this reason, the average light transmission rate in the first region R ₁ is smaller than the average light transmission rate in the second region R _2, and as a result, the same effect as in the case of the multi-projection display 100 according to the first embodiment is obtained.

  In other words, the “black floating pattern” without the need for a light shielding plate having a complicated mechanism for accurately shielding the light projected on the overlapping region and a complicated mechanism for accurately positioning such a light shielding plate Can be suppressed.

  The area of the micromirror can be adjusted by the area of the micromirror itself, or can be adjusted by partially forming a light-impermeable member on the micromirror.

  The multi-projection display, projector unit, and electro-optic modulation device of the present invention have been described based on each of the above embodiments. However, the present invention is not limited to each of the above embodiments, and does not depart from the spirit of the present invention. Can be implemented in various modes, and for example, the following modifications are possible.

(1) the multi-projection display 100b according to Embodiment 3 or 4 described above, in 100c, the liquid crystal device, each pixel in the first region R ₁ is a liquid crystal device is covered with semi-translucent member The present invention is not limited to this, and a liquid crystal device in which a semi-transparent member exists on the optical path of light passing through each pixel in the first region R ₁ can be used.

(2) multi-projection display 100f according to the embodiment 7 or 8 above, in the 100 g, the liquid crystal device, each pixel in the first region R ₁ is a liquid crystal device which is covered by opaque member The present invention is not limited to this, and a liquid crystal device in which an opaque member is present on an optical path of light passing through each pixel in the first region R ₁ can be used.

FIG. 3 is a diagram illustrating a configuration of a multi-projection display according to the first embodiment. FIG. 3 is a diagram illustrating an optical system of a projector unit used in the multi-projection display according to the first embodiment. FIG. 3 is a block diagram for explaining the multi-projection display according to the first embodiment. FIG. 3 is a view for explaining functions of a unit image information correction unit in the multi-projection display according to the first embodiment. FIG. 3 is a view for explaining functions of a unit image information correction unit in the multi-projection display according to the first embodiment. FIG. 3 is a view for explaining functions of a unit image information correction unit in the multi-projection display according to the first embodiment. FIG. 3 is a view for explaining functions of a unit image information correction unit in the multi-projection display according to the first embodiment. FIG. 3 is a view for explaining a liquid crystal device used in the multi-projection display according to the first embodiment. FIG. 3 is a view for explaining a liquid crystal device used in the multi-projection display according to the first embodiment. FIG. 3 is a view for explaining a liquid crystal device used in the multi-projection display according to the first embodiment. FIG. 4 is a diagram for explaining the effect of the multi-projection display according to the first embodiment. FIG. 6 is a view for explaining a liquid crystal device used for a multi-projection display according to a second embodiment. FIG. 6 is a view for explaining a liquid crystal device used for a multi-projection display according to a third embodiment. FIG. 10 is a view for explaining a liquid crystal device used for a multi-projection display according to a fourth embodiment. FIG. 6 is a view for explaining a liquid crystal device used for a multi-projection display according to a fifth embodiment. FIG. 10 is a view for explaining a liquid crystal device used for a multi-projection display according to a sixth embodiment. FIG. 10 is a view for explaining a liquid crystal device used for a multi-projection display according to a seventh embodiment. FIG. 10 is a view for explaining a liquid crystal device used for a multi-projection display according to an eighth embodiment. FIG. 10 is a view for explaining a liquid crystal device used for a multi-projection display according to a ninth embodiment. FIG. 18 is a diagram for explaining a liquid crystal device used for a multi-projection display according to the tenth embodiment. FIG. 20 is a diagram showing an optical system of a projector unit used for a multi-projection display according to an eleventh embodiment. It shows in order to demonstrate the multi-projection display which concerns on Embodiment 12. FIG. The figure shown in order to demonstrate the multi-projection display which concerns on Embodiment 13. FIG. The figure shown in order to demonstrate the multi-projection display which concerns on Embodiment 14. FIG. The figure shown in order to demonstrate a multi-projection display. The figure shown in order to demonstrate "black floating" in the projector using a liquid crystal device. The figure shown in order to demonstrate the "black floating pattern" in a multi-projection display. The figure shown in order to demonstrate the conventional multi-projection display.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Light source, 12 ... Integrator lens, 14 ... Polarization conversion element, 16 ... Superimposition lens, 18, 20 ... Dichroic mirror, 22, 24, 26 ... Reflection mirror, 28, 30 ... Lens, 32R, 32G, 32B, 40R, 40G, 40B, 42R, 42G, 42B, 44R, 44G, 44B, 46R, 46G, 46B, 48R, 48G, 48B, 50R, 50G, 50B, 52R, 52G, 52B, 54R, 54G, 54B, 56R, 56G, 56B ... Liquid crystal device, 34 ... Polarizing plate, 36 ... Cross dichroic prism, 38 ... Projection lens, 58R, 58G, 58B ... Reflective liquid crystal device, 60R, 60G, 60B ... Micromirror light modulator, 70R, 70G, 70B: Solid light source, 100, 900: Multi-projection display, 102 Housing, 104 ... base, 106 ... reflecting mirror, 110 ... controller, 120 ... unit image information generating _{unit, 130, PJ A, PJ B} , PJ C, PJ D ... projector unit, 140 ... imaging device, 142 ... imaging Elements: 144: AD conversion element, 146: Image processing unit, 150: Unit image information correction unit, 152: Correction parameter storage unit, 154: Optical correction means, 160: Image signal reception unit, 162: Image information storage unit for adjustment , 910 _A , 910 _B , 910 _C ..., Light shielding plate, 910 _AB , 910 _BA , 910 _BC , 910 _CB , 911, 912, 913, 914 ... light shielding part, I _A , I _B , I _C , I _D. Image, PJ... Projector, R ₁ ,... First region, R ₁ (2), R ₁ (4)... Multiple regions in the first region, R ₂ . S ₁ , S _AB , S _AC , S _ABCD , S _BD , S _CD ... Superimposed area, S ₂ , S _A , S _B , S _C , S _D ... Non-superimposed area, SCR ... Screen

Claims (14)

In a multi-projection display that has a plurality of projector units each having an electro-optic modulation device, and performs tiling projection in a state where a plurality of projection images projected from the plurality of projector units are partially superimposed on a projection surface,
In the electro-optic modulation device, the average light transmission rate in the first region for generating the projection image projected on the superimposed region projected with the projection image superimposed on the projection surface is such that the projection image is not superimposed on the projection surface. A multi-projection display, wherein the multi-projection display is set to be smaller than an average light transmission rate in a second region that generates a projection image projected on a non-overlapping region projected in a state. The multi-projection display according to claim 1.
The first region is divided into a plurality of regions according to the number of superimpositions on which the projection image is superimposed on the superimposition region,
An average light transmission rate in the plurality of regions is set according to the number of superpositions. The multi-projection display according to claim 2.
The multi-projection display according to claim 1, wherein an average light passing rate in the plurality of regions is set to gradually decrease as the distance from the second region increases. In the multi-projection display in any one of Claims 1-3,
An effective pixel area in the first region is set to be smaller than an effective pixel area in the second region. In the multi-projection display in any one of Claims 1-3,
The multi-projection display according to claim 1, wherein the light transmittance or light reflectance of each pixel in the first region is set smaller than the light transmittance or light reflectance of each pixel in the second region. The multi-projection display according to claim 5, wherein
A multi-projection display characterized in that a semi-transparent member exists on an optical path of light passing through each pixel in the first region. In the multi-projection display in any one of Claims 1-3,
The multi-projection display according to claim 1, wherein a pixel density in the first region is set smaller than a pixel density in the second region. The multi-projection display according to claim 7.
The electro-optic modulation device is a multi-projection display, wherein the pixels in the first region are formed with a lower pixel density than the second pixels. The multi-projection display according to claim 7.
The electro-optic modulation device can reduce the pixel density of the first region by making it impossible to use light from some of the original pixels in the original region (hereinafter referred to as “original pixels”) in the first region. Multi-projection display characterized by being set small. The multi-projection display according to claim 9,
A multi-projection display, wherein an opaque member or a light deflecting member is present on an optical path of light passing through some of the original pixels in the first region. The multi-projection display according to claim 9,
The electro-optic modulation device is a liquid crystal device, and some of the original pixels in the first region are always in a light non-transmissive state by applying a voltage sufficiently away from the threshold voltage. A multi-projection display characterized by The multi-projection display according to claim 11.
A multi-projection display having a function of determining the original pixels of the part in the first area based on a result of photographing a projection plane by an imaging device. A projector unit for use in the multi-projection display according to any one of claims 1 to 12,
A projector unit comprising an electro-optic modulation device in which an average light transmission rate in the first region is set smaller than an average light transmission rate in the second region. An electro-optic modulation device for use in the multi-projection display according to any one of claims 1 to 12,
An electro-optic modulation device, wherein an average light transmission rate in the first region is set smaller than an average light transmission rate in the second region.