JP2005128234A - Projector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a projector by which illumination light can be used without waste according to a screen shape and a liquid crystal panel can be efficiently illuminated. <P>SOLUTION: The cross-sectional shapes of rod integrators 21c, 23c, and 25c of respective colors, that is, the contours of their emission ports OP are made similar to the contours of the projected areas 31g of liquid crystal light valves 31, 33, and 35 of the respective colors. In addition, the sizes of the emission ports OP are made slightly larger than those of the projected areas 31g located opposite to the corresponding emission ports OP. Thus, uniform illumination light emitted from the emission ports OP of the rod integrators 21c, 23c, and 25c can be made incident on the projected areas 31g of the liquid crystal light valves 31, 33, and 35 of the respective colors without loss and without damaging uniformity. Accordingly, high quality image can be projected with high luminance onto the projection area 18a of a transmission type screen member 18. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a projector that projects an image using a liquid crystal light valve or other light modulation device.

As a conventional projector, a light source array is disposed facing one end of a rectangular bar-shaped light guide, and a liquid crystal panel is disposed facing the other end of the light guide to guide light from the light source array. There is one in which light is directly incident on one end of a light body and illumination light from the other end of the light guide is directly incident on a liquid crystal panel (see Patent Document 1).
Figures 6 and 7 of Japanese Patent Laid-Open No. 2000-112031

  However, in the projector described above, the cross-sectional shape of the light guide is matched to the outer shape of the display area of the liquid crystal panel, and the rectangular display area on the liquid crystal panel is illuminated. For example, the display area of the liquid crystal panel is rectangular. When the screen to which the image is projected is octagonal, the illumination light incident on the four corners of the rectangular area of the liquid crystal panel is not used effectively and is wasted.

  Therefore, an object of the present invention is to provide a projector that can use illumination light without waste according to the shape of a screen and can efficiently illuminate a liquid crystal panel.

  In order to solve the above problems, a first projector according to the present invention includes (a) a screen having a projection area of a predetermined shape, and (b) a light source light that has an incident end and an exit end and is incident on the incident end. Integrator that emits as uniformed illumination light from an exit end having a shape substantially similar to a predetermined shape of the projection area, and (c) spatially modulating the illumination light from the exit end of the rod integrator A light modulation device; and (d) a projection optical system that projects image light modulated by the light modulation device onto a projection region of a screen. Here, the “light modulation device” is a concept including a transmissive liquid crystal light valve, a digital mirror device (DMD), and the like.

  In the projector described above, the exit end of the rod integrator has a shape that is substantially similar to the predetermined shape of the projection area provided on the screen. Therefore, the image display area of the light modulation device (the area corresponding to the projection area of the screen) Only the projection area) can be efficiently illuminated. That is, only a portion of the light modulation device that directly corresponds to the projected image can be illuminated without loss by illumination light having sufficient luminance and uniformity, and a high-luminance image can be projected.

  In a specific embodiment of the present invention, the screen is a rear projection type screen. That is, when the shape of the projection area of a rear projection screen that is fixedly installed with respect to the projection optical system or the like is arbitrarily set, a high-luminance image can be projected onto the projection area.

  In another specific aspect of the present invention, the predetermined shape of the projection area provided on the screen is obtained by removing at least one of the four corners of the rectangle. In this case, the screen can be rounded with few corners, and illumination light incident on any one of the four corners of the rectangle outside the area corresponding to the projection area (projected area) of the light modulator is wasted. Can be prevented.

  In still another specific embodiment of the present invention, the rod integrator is a columnar body having an octagonal or circular cross section. In this case, the projection area of the screen can be an octagon or a circle corresponding to the cross section of the rod integrator. Here, the “circular shape” includes not only a simple circle but also a shape surrounded by a curve such as an ellipse or an ellipse.

  In still another specific aspect of the present invention, the optical system further includes a light source optical system that collects light from the light source and makes it incident on an incident end of the rod integrator. In this case, the optionality of the number, shape, dimensions, etc. of the light source is increased, and the intensity and utilization efficiency of the light source light can be increased.

  According to still another specific aspect of the present invention, the light modulation device is a transmissive liquid crystal display element disposed close to the exit end of the rod integrator. In this case, the illumination light emitted from the rod integrator can be efficiently used, and the uniformity of illumination of the liquid crystal display element can be improved.

  In still another specific aspect of the present invention, the light modulation device has a rectangular effective pixel region. In this case, the light modulation device can be an off-the-shelf standard product, and it is possible to prevent the illumination light incident on the four rectangular corners of the effective pixel region of the light modulation device from being wasted.

  The second projector according to the present invention includes (a) a screen having a projection area of a predetermined shape, and (b) each color from the light source of each color incident on the incident end while having an incident end and an exit end. A light source light from a light emitting end having a shape similar to a predetermined shape of the projection area, and a light beam for each color, and (c) light emission from each color rod integrator. A light modulation device for each color that spatially modulates illumination light of each color from the end, and (d) a light combining optical system that combines and emits image light of each color modulated by the light modulation device for each color And (e) a projection optical system that projects image light combined through the light combining optical system onto a projection area of the screen.

  In the projector, since the exit end of the rod integrator for each color has a shape substantially similar to the predetermined shape of the projection area provided on the screen, the projection area of the screen among the image display areas of the light modulation device for each color It is possible to efficiently illuminate only the region corresponding to each. In other words, only the portion directly corresponding to the projection image of the light modulation device for each color can be illuminated without loss by the illumination light of each color having sufficient luminance and uniformity, and a high-luminance color image can be projected. Can do.

[First Embodiment]
FIGS. 1A and 1B are a partially broken front view and a side view for conceptually explaining the structure of the projector according to the first embodiment of the present invention.

  The projector 10 is a rear projection type device that displays an image by rear projection, and includes a projector main body 14 at the bottom of a case 12 that is a casing, and a reflection mirror 16 at the upper rear side in the case 12. 12 A transmission screen member 18 is provided on the front surface. The image light emitted from the projector main body 14 travels obliquely upward and rearward with the optical axis OA1 as the center, and is transmitted to the front side with the optical axis OA2 extending horizontally by the reflection mirror 16 and having an oval outline. The light enters the mold screen member 18. The transmissive screen member 18 has a projection area 18a that occupies substantially the entire surface thereof. The projection area 18a is an area for projecting image light from the projector main body 14, and is an octagonal area surrounded by an outline composed of eight line segments extending along the inside of the outline of the transmissive screen member 18. It has become. The projector main body 14, the reflection mirror 16, and the transmissive screen member 18 are positioned and fixed in the case 12 by means not shown.

  FIG. 2 is a block diagram conceptually illustrating the structure of the projector main body 14 shown in FIG. The projector main body 14 includes an illumination device 20, a light modulation device 30, a projection lens 40, and a control device 50. Here, the illumination device 20 includes a B light illumination device 21, a G light illumination device 23, an R light illumination device 25, and a light source driving device 27. The light modulation device 30 includes three liquid crystal light valves 31, 33, and 35, a cross dichroic prism 37 that is a light combining optical system, and an element drive device 38 that outputs a drive signal to each of the liquid crystal light valves 31, 33, and 35. And have.

  3A is a plan view showing an appearance of the projector main body 14 shown in FIG. 2, and FIG. 3B is a side view thereof. Each color light illuminating device 21, 23, 25 and the liquid crystal light valves 31, 33, 35 are fixed at appropriate positions in the chassis 61, and the projection lens 40 is fixed so as to be embedded in one side surface of the chassis 61. Further, the light source driving device 27, the element driving device 38, and the control device 50 shown in FIG. 1 are mounted on a circuit board 62 provided to face the upper surface of the chassis 61.

  Returning to FIG. 2, the B light illumination device 21 includes a B light source unit 21 a and a rod integrator 21 c. Among these, the light source unit 21a for B light is composed of a plurality of LEDs 21f called solid-state light sources mounted on the circuit board 21g in an appropriate two-dimensional array (for example, a matrix array), and beam shaping is performed in front of each LED 21f. And a condensing lens array 21b in which lens elements are individually arranged. Each LED 21f is an off-the-shelf product whose size is standardized, and generates B light included in the blue (B) category of the three primary colors. The B light extracted from the LED 21f, that is, the first light source light LB passes through the condenser lens array 21b and then enters the incident end, that is, the incident port IP of the rod integrator 21c having an octagonal cross section. At this time, the B light from each LED 21f is appropriately diverged by each lens element constituting the condenser lens array 21b and is made into a beam having a circular cross section that gathers at a predetermined position. That is, the B light from each LED 21f is collected as a whole at a rectangular incident port IP provided in the rod integrator 21c, and is incident on the incident port IP without leaking. The first illumination light emitted from the exit port OP which is the exit end via the rod integrator 21c is liquid crystal for B light in the light modulation device 30 through the first polarizing filter 26a arranged to face the exit port OP. The light enters the light valve 31. As a result, the octagonal illuminated region on the liquid crystal light valve 31 is illuminated uniformly by the B light. In the above, the top lens of the LED 21f and the condensing lens array 21b constitute a light source optical system that condenses the first light source light LB and makes it incident on the rod integrator 21c.

  FIG. 4 is a perspective view for explaining the shape of the rod integrator 21c for B light. As is apparent from the figure, the rod integrator 21c is a rod-like member obtained by processing a glass material into an octagonal prism shape. More specifically, the rod integrator 21c includes a pair of end faces corresponding to the entrance port IP and the exit port OP that are parallel to each other. Further, around the block body between the entrance port IP and the exit port OP, there are provided eight side surfaces SS that are flat surfaces, and as a result, an octagonal cross section perpendicular to the axial direction. In this rod integrator 21c, the light source light that has entered from the entrance port IP is emitted from the exit port OP as illumination light that is uniformly superimposed while repeating total reflection inside the eight side surfaces SS.

  Returning to FIG. 2, the G light illumination device 23 includes a G light source unit 23 a and a rod integrator 23 c. Among these, the G light source unit 23a has the same structure as the B light source unit 21a, but each LED 23f on the circuit board 23g emits G light included in the green (G) category of the three primary colors. The second light source light LG generated by the G light is incident on the incident port IP of the rod integrator 23c having an octagonal cross section through the condenser lens array 23b without being leaked. The second illumination light LG that has passed through the rod integrator 23c is uniformized without loss by wavefront division and superposition, and the light modulator G of the light modulation device 30 passes through the first polarizing filter 26b that is disposed opposite to the emission port OP. The light enters the liquid crystal light valve 33 for light. As a result, the octagonal illuminated region on the liquid crystal light valve 33 is uniformly illuminated by the G light. The G light rod integrator 23c has the same shape as the B light rod integrator 21c shown in FIG.

  The R light illumination device 25 includes an R light source unit 25a and a rod integrator 25c. Among these, the R light source unit 25a has the same structure as the B light source unit 21a, but each LED 25f on the circuit board 25g emits R light included in the red (R) category of the three primary colors. The third light source light LR generated by the R light is incident on the incident port IP of the rod integrator 25c having an octagonal cross section through the condenser lens array 25b without being leaked. The third illumination light LR that has passed through the rod integrator 25c is uniformized without loss by wavefront division and superposition, and R of the light modulation device 30 passes through the first polarizing filter 26c that is disposed opposite to the emission port OP. The light enters the liquid crystal light valve 35 for light. As a result, the octagonal illuminated region on the liquid crystal light valve 35 is uniformly illuminated by the R light. The rod integrator 25c for R light also has the same shape as the rod integrator 21c for B light shown in FIG.

  Each of the liquid crystal light valves 31, 33, and 35 is a light transmission type light modulation device. By switching the polarization direction of illumination light in units of pixels in accordance with an image signal input from the outside, each of the liquid crystal light valves 31, Illumination light from each of the color light illumination devices 21, 23, 25 incident on 33, 35 is two-dimensionally modulated. On the incident side of each liquid crystal light valve 31, 33, 35, first polarizing filters 26a, 26b, 26c are arranged facing the incident surface, and each liquid crystal light valve 31, 33, 35 is placed in a specific direction. It can be illuminated by a polarized component. In addition, second polarizing filters 36a, 36b, and 36c are arranged on the exit side of the liquid crystal light valves 31, 33, and 35 so as to face the exit surfaces, and pass through the liquid crystal light valves 31, 33, and 35. Only the polarization component in the direction orthogonal to the specified direction can be read out. Illumination light from the color light illuminators 21, 23, and 25 incident on the liquid crystal light valves 31, 33, and 35 is modulated two-dimensionally by the liquid crystal light valves 31, 33, and 35, respectively. The image lights of the respective colors that have passed through the liquid crystal light valves 31, 33, and 35 are combined by the cross dichroic prism 37 and emitted from one side surface thereof. The combined light image emitted from the cross dichroic prism 37 enters the projection lens 40 that is a projection optical system, and is projected on the projection area 18 a of the transmission type screen member 18 at an appropriate magnification. That is, the projector 10 projects a color image obtained by combining the images of the colors B, G, and R formed on the liquid crystal light valves 31, 33, and 35 onto the octagonal projection area 18a on the screen as a moving image or a still image. Is done.

  FIG. 5 is a front view of the liquid crystal light valve 31 for B light. The liquid crystal light valve 31 has a main body portion 31a fitted and fixed to a frame body 31b, and a cable CA for sending an image signal to the main body portion 31a extends from the upper portion of the frame body 31b. A protruding edge portion 31c is provided around the main body portion 31a exposed to the front surface, and the first polarizing filter 26a can be fixed by an adhesive or an adhesive. Although not shown, the second polarizing filter 36a (see FIG. 2) can be attached to the back side of the liquid crystal light valve 31 in the same manner. The first polarizing filter 26a, the second polarizing filter 36a, and the like can be directly attached to the surface of the main body portion 31a. Although not described here, the liquid crystal light valves 33 and 35 for other colors also have the same structure as the liquid crystal light valve 31 for the B light.

  FIG. 6 is a diagram for explaining the arrangement relationship between the liquid crystal light valve 31 and the rod integrator 21c shown in FIG. In the main body portion 31a of the liquid crystal light valve 31, for example, a rectangular central portion excluding an edge portion of about 10% of the vertical dimension is an effective pixel region 31f. That is, since only the illumination light incident on the central effective pixel region 31f is modulated, the illumination light incident on the outside thereof is wasted. Furthermore, not all the pixels in the effective pixel region 31f are projected onto the projection region 18a of the transmissive screen member 18, but only the pixels in the octagonal projection region 31g obtained by projecting the projection region 18a in reverse. 18a. That is, only the illumination light incident on the projection area 31g is used for image formation, and the rest is not only wasted but also causes stray light. From the viewpoint of illumination efficiency, the illumination emitted from the rod integrator 21c It is desirable that all the light is incident on the projected area 31g. For this reason, the shape of the injection port OP of the rod integrator 21 c is similar to the shape of the projected region 31 g of the liquid crystal light valve 31.

  On the other hand, it is difficult to accurately make the illumination light incident only on the projection area 31g, and the burden of the alignment work of the rod integrator 21c on the liquid crystal light valve 31 also increases. Therefore, the size of the injection port OP of the rod integrator 21c is made slightly larger than the projection area 31g. However, in order to reduce the waste of illumination light as much as possible, the size of the injection port OP is made small enough not to protrude from the exposed portion of the main body portion 31a. Note that the exit port OP at the tip of the rod integrator 21c is disposed through the first polarizing filter 26a but very close to the main body portion 31a, so that almost no illumination light is emitted from the exit port OP. The light can enter the main body portion 31a without being diffused, and the effective pixel region 31f can be efficiently and uniformly illuminated.

  The above is the description of the shape and arrangement of the rod integrator 21c with respect to the liquid crystal light valve 31, but the shape and arrangement of the rod integrators 23c and 25c with respect to the other liquid crystal light valves 33 and 35 are the same as described above. The illumination light emitted from the liquid crystal light valves 33 and 35 can be incident on the projected areas of the liquid crystal light valves 33 and 35 (areas to be projected onto the projection area 18a of the transmission type screen member 18) without any waste. Can be illuminated.

  The operation of the projector 10 shown in FIG. The illumination lights of the respective colors from the BGR light illumination devices 21, 23, and 25 provided in the illumination device 20 are incident on the corresponding liquid crystal light valves 31, 33, and 35, respectively. Each of the liquid crystal light valves 31, 33, and 35 has a two-dimensional refractive index distribution modulated by an element driving device 38 that operates according to an image signal from the outside, and two-dimensional spatial distribution of illumination light of each color. Is modulated in units of pixels. As described above, the illumination light, that is, image light modulated by the liquid crystal light valves 31, 33, and 35, after being combined by the cross dichroic prism 37, enters the projection lens 40 that is a projection optical system and enters the transmission screen member 18. Projected on. In this case, the cross-sectional shapes of the rod integrators 21c, 23c, and 25c for the respective colors, that is, the contours of the injection ports OP are similar to the contours of the projected region 31g in the liquid crystal light valves 31, 33, and 35 for the respective colors. The size of the injection port OP is slightly larger than the size of the projection area 31g facing each other. As a result, the uniform illumination light emitted from the emission ports OP of the rod integrators 21c, 23c, and 25c is incident on the projected areas 31g of the liquid crystal light valves 31, 33, and 35 of each color without loss and without losing uniformity. Can do. That is, a high-luminance and high-quality image can be projected onto the projection area 18 a of the transmissive screen member 18.

[Second Embodiment]
Hereinafter, a projector according to a second embodiment of the invention will be described. Since the projector according to the second embodiment is a modification of the projector according to the first embodiment, description of common parts is omitted, and only different parts are described.

  7A and 7B are a partially broken front view and a side view for explaining the structure of the projector according to the second embodiment. In the projector 110, the image light emitted from the projector main body 14 travels obliquely upward and backward about the optical axis OA 1 by adjusting the postures of the projector main body 14 and the reflection mirror 16, and the optical axis tilted by the reflection mirror 16. The OA2 is bent to the front side and is incident on the transmission screen member 18 at an angle. As a result, in the projection area 18a of the transmission type screen member 18, the enlargement ratio of the projected image on the upper side becomes large and the enlargement ratio of the projection image on the lower side becomes small, so that trapezoidal distortion occurs in the projected image. In order to offset this, the projected areas on the liquid crystal light valves 31, 33, and 35 are deformed corresponding to the trapezoidal distortion, and the cross-sectional shapes of the rod integrators 121c, 123c, and 125c are corrected corresponding to the trapezoidal distortion. doing.

  FIG. 8 is a view for explaining the positional relationship between the liquid crystal light valve 31 and the rod integrator 121c. In this case, the pixels of the distorted octagonal projection region 131g in the effective pixel region 31f of the liquid crystal light valve 31 are projected onto the distorted octagonal projection region 18a (see FIG. 7A). The projected area 131g is a projection of the projection area 18a of the transmissive screen member 18 on the liquid crystal light valve 31 in reverse. For this reason, the shape of the injection port OP of the rod integrator 121c is similar to the shape of the projected region 131g of the liquid crystal light valve 31. Further, the size of the injection port OP of the rod integrator 121c is made slightly larger than the projection area 131g. As a result, the illumination light emitted from the rod integrator 121c can be incident on the distorted projection target region 131g of the liquid crystal light valve 31 with little waste, and this can be illuminated uniformly.

  The above is the description of the shape and arrangement of the rod integrator 121c with respect to the liquid crystal light valve 31, but the shape and arrangement of the rod integrators 123c and 125c with respect to the other liquid crystal light valves 33 and 35 are the same as described above. Illumination light emitted from 123c and 125c can be incident on the projected areas of both liquid crystal light valves 33 and 35 with little waste, and these can be illuminated uniformly.

  As described above, the present invention has been described according to the embodiment, but the present invention is not limited to the above embodiment. For example, in the above-described embodiment, the projection area 18a provided on the transmission type screen member 18 has a contour that is connected by a straight line (a broken line), but the projection area has a contour composed of a curve such as an ellipse or an ellipse. It can also be. In this case, as conceptually illustrated in FIG. 9, the rod integrator 221 c is a cross-section having a contour formed by a curve such as an ellipse or an ellipse. That is, the injection port OP of the rod integrator 221c has a similar shape to the projected region 231g having an ellipse outline in the effective pixel region 31f provided in the main body portion 31a of the liquid crystal light valve 31, and its size is It is slightly larger than the size of the projection area 231g. In addition, in the same figure, the to-be-projected area | region 231g has a similar shape with the projection area | region of a transmission type screen member.

  In addition, the shape and structure of the condenser lens arrays 21b, 23b, and 25b in the color light illuminating devices 21, 23, and 25 can be appropriately changed according to the specifications of the projector. As a result, the incident angle range of the illumination light incident on the rod integrators 21c, 23c, and 25c of each color can be adjusted. As a result, the viewing angle of the illumination light incident on the liquid crystal light valves 31, 33, and 35 of each color is adjusted. The range can be freely controlled to some extent.

  The first polarizing filters 26a, 26b, and 26c are arranged between the emission ports OP of the rod integrators 21c, 23c, and 25c of the respective colors and the liquid crystal light valves 31, 33, and 35 of the respective colors. Further, it can be arranged on the incident port IP side or in the rod integrators 21c, 23c, 25c.

  The rod integrators 21c, 23c, and 25c are not limited to being solid, and may be hollow. In this case, the inner surface contour of the hollow cross section corresponds to the contour of the projected region 231 g of the liquid crystal light valve 31.

  Further, as the projector 10, the light source light from the white light source is collected by a mirror or the like and incident on the incident end of the rod integrator to obtain uniform illumination light at the exit end of the rod integrator. It is also possible to directly illuminate a single color display type liquid crystal light valve disposed facing the integrator's exit end. Also in this case, by using the rod integrator 21c or the like as in the above embodiment, the light source light from the white light source can be used efficiently, and the effective pixel area of the liquid crystal light valve can be illuminated uniformly and efficiently. can do.

  Moreover, in the said embodiment, although the injection | emission end OP of rod integrator 21c, 23c, 25c is arrange | positioned close to each liquid crystal light valve 31,33,35, each injection | emission end OP and each liquid crystal light valve 31, A lens or the like can be interposed between the liquid crystal light valves 31, 35, and a reduced image or an enlarged image of each exit end OP can be projected onto the projection areas on the liquid crystal light valves 31, 33, 35.

(A), (b) is a figure explaining the projector of 1st Embodiment. It is a block diagram which illustrates notionally the structure of a projector main body. (A), (b) is the top view and side view of the main-body part of a projector. It is a perspective view explaining the shape of a rod integrator. It is a front view of a liquid crystal light valve. It is a figure explaining the arrangement | positioning relationship between a liquid crystal light valve and a rod integrator. (A), (b) is a figure explaining the projector of 2nd Embodiment. It is a figure explaining the arrangement | positioning relationship between a liquid crystal light valve and a rod integrator. It is a perspective view explaining the modification of 1st Embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Projector, 14 ... Projector body, 16 ... Reflection mirror, 18 ... Transmission type screen member, 18a ... Projection area, 20 ... Illumination device, 21 ... B light illumination device, 21a ... Light source unit for B light, 21c, 23c, 25c ... Rod integrator, 23 ... G light illumination device, 23a ... Light source unit for G light, 25 ... R light illumination device, 25a ... Light source unit for R light, 27 ... Light source drive device, 30 ... Light modulation device, 31, 33 35 ... Liquid crystal light valve, 31f ... Effective pixel area, 31g ... Projected area, 37 ... Cross dichroic prism, 38 ... Element driving device, 40 ... Projection lens, 50 ... Control device

Claims (8)

A screen having a projection area of a predetermined shape;
A rod integrator that has an entrance end and an exit end and emits light source light incident on the entrance end as uniformed illumination light from the exit end having a shape substantially similar to the predetermined shape of the projection region When,
A light modulation device that spatially modulates illumination light from the exit end of the rod integrator;
A projection optical system that projects the image light modulated by the light modulation device onto the projection area of the screen;
A projector comprising:   The projector according to claim 1, wherein the screen is a rear projection type screen.   The projector according to any one of claims 1 and 2, wherein the predetermined shape of the projection area provided on the screen is obtained by removing at least one of four corners of a rectangle.   The projector according to any one of claims 1 to 3, wherein the rod integrator is a columnar body having an octagonal or circular cross section.   5. The projector according to claim 1, further comprising a light source optical system that collects light from a light source and causes the light to enter the incident end of the rod integrator.   6. The projector according to claim 1, wherein the light modulation device is a transmissive liquid crystal display element disposed in proximity to the emission end of the rod integrator. 7.   The projector according to claim 6, wherein the light modulation device has a rectangular effective pixel region. A screen having a projection area of a predetermined shape;
The light source light of each color from the light source of each color incident on the incident end is made uniform from the emission end having a shape similar to the predetermined shape of the projection area. A rod integrator for each color that is emitted as illumination light of each color, and
A light modulator for each color that spatially modulates illumination light of each color from the exit end of the rod integrator for each color;
A light combining optical system for combining and emitting image light of each color modulated by the light modulation device for each color;
A projection optical system for projecting the image light synthesized through the light synthesis optical system onto the projection area of the screen;
A projector comprising:

Images