JP2000002859A - Projection display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten a width of a projection display device using a display body such as a liquid crystal display element, etc., and enable miniaturization and reduction in weight. SOLUTION: This projection display device has a U-shaped construction wherein a lighting system part comprising a white light source part 21 having an oval mirror 21a, a condenser lens 22 for condensing the light, a quadrangular cross-sectional cylinder-shaped glass rod integrator 23 splitting the condensed luminous flux into plural luminous fluxes, an image-forming relay lens part 24 focusing the plural images from the integrator 23, a polarized light conversion element 25, and relay lenses 26; and an optical part comprising a color separating optical system consisting of 1st, 2nd, 3rd dichroic mirrors 27, 28, 31 for separating the luminous flux from the relay lenses 26 into three colors, an image display element parts 30a, 30b, 30c consisting of liquid crystal, etc., a color optical synthesis element 33 for synthesizing the color-separated luminous fluxes, and a projection lens 34 for projecting the image on a screen, are arranged in parallel.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an arrangement structure of components of a projection display apparatus for uniformly illuminating a rectangular area of a display such as a liquid crystal display device.

[0002]

2. Description of the Related Art In recent years, as a generally known projection type color display device, a projection type display device using a liquid crystal display element in place of a cathode ray tube has recently been known, and many commercial products have already appeared. are doing. Since the liquid crystal display element itself does not emit light, it is necessary to illuminate the liquid crystal display element with another light source, so that a bright screen can be displayed according to the brightness of the light source. The projection type color display device using such a liquid crystal display element includes a three-panel type using three liquid crystal display elements according to three primary colors and a single-panel type using only one liquid crystal display element.

[0003] In the three-plate system, a single white light source is used,
Generally, a dichroic mirror separates the light into three primary colors of red, green, and blue, and irradiates each color light to a liquid crystal display element for that color to synthesize colors to obtain a full-color image. As a light source, a white light source such as a halogen lamp, a xenon lamp, and a metal halide lamp is used. Compared with the single-panel system described later, it is excellent in that it has good color purity because of the degree of freedom of color separation and color synthesis, and that a bright image about three times as bright can be obtained. On the other hand, the configuration becomes complicated, and it is inevitably expensive due to the use of a plurality of liquid crystal display elements.

On the other hand, in the single-panel system, a color filter is also provided on the same liquid crystal, and a light beam for individually illuminating each of the red, green, and blue pixels on the same liquid crystal without separating into three primary colors. Japanese Patent No. 2622185 discloses a technique in which light is radiated from different directions and brightness is secured by selective selection using micro lenses provided integrally with the array pixels.

FIG. 5 shows a main part of a projection type color display device using a conventional three-panel type liquid crystal display element. That is, a light beam from a light source 2 that emits white light is condensed by a parabolic reflecting mirror 3 in a main body 1 of the apparatus, and a fly-eye that generates a secondary light source image to obtain uniform illumination light and rectangular illumination light. An integrator unit 4 including lens array plates 4a and 4b;
A polarization conversion element 5 for synthesizing polarized light to enhance light use efficiency, a color separation system 7 including dichroic mirrors 6a and 6b for separating white light source light into red, green, and blue light;
The liquid crystal display elements 8R driven in accordance with green and blue color signals,
8G and 8B, a combining prism 9 for combining colors, and a projection lens 10. Note that, in order to reduce the size of the entire apparatus, a total reflection mirror 11 that deflects the optical path by 90 degrees is provided between the polarization conversion element 5 and the color separation system 7.

[0006]

By the way, in the above-mentioned conventional example, the projection lens 10 protrudes from the main body of the apparatus, so that it is difficult to store the apparatus and it is difficult to reduce the size of the apparatus. Further, in the above-mentioned conventional example, in order to obtain a parallel light beam from the white light source 2, the reflecting mirror is a parabolic reflecting mirror 3, and the light beam captured by the reflecting mirror 3 converges to the fly-eye lens array plate 4a of the integrator unit 4. Therefore, the outer shape of the fly-eye lens array plate 4a is substantially equal to the inner diameter of the reflecting mirror 3, which is a major factor that hinders miniaturization. Therefore, two fly-eye lens arrangement plates 4a, 4b
The size of the fly-eye lens array plate 4a is the same as the inner diameter of the reflecting mirror, as disclosed in Japanese Patent Application Laid-Open No. 5-346557. On the other hand, the one disclosed in Japanese Patent Application Laid-Open No. 5-72627 discloses a condenser in which a light beam from a white light source is once focused at the focal point of an elliptical mirror using an elliptical mirror, and then the focal plane is focused at the focal plane. In some cases, a lens is arranged to obtain parallel light. However, even in these conventional examples, the outer shape of the condenser lens is almost equal to the inner diameter of the elliptical mirror, and the entire system has not been reduced in size.

Therefore, in FIG. 5, the light source 2 to the fly-eye lens arrangement plates 4a and 4b and the total reflection mirror 1
The outer shape up to 1 is almost the same as the inner diameter of the reflector 3,
The partition wall 12 of the casing holding these components must be arranged in parallel with the optical axis of the reflecting mirror and separated by a radius inside the reflecting mirror. Therefore, the dichroic mirror 6 for color separation cannot be arranged closer to the optical axis of the reflecting mirror than the partition 12 and it is difficult to reduce the size.

An object of the present invention is to provide a projection display device using a liquid crystal display element or the like which can reduce the size of the entire device in view of the above-mentioned problems of the conventional example.

[0009]

In order to achieve the above-mentioned object, the present invention projects an image of an image display device on a screen via a light beam splitting unit for splitting a light beam condensed from a white light source into a plurality of light beams. The optical system up to the projection lens is arranged in a U-shape.

[0010]

According to the present invention, there is provided a light source for emitting white light, a light condensing portion for condensing light from the light source to generate a secondary light source image, and a light beam from the light converging portion. A light beam splitting unit that splits a plurality of light beams, a relay lens unit that forms a plurality of tertiary light source images from the light beam splitting unit, a polarization conversion element, and an integrated relay lens unit that aligns the plurality of tertiary light source images at predetermined positions A color separation optical system that separates the light beam from the illumination system portion into red, green, and blue, a color combining optical system that combines the image display device and the color separated light beam, and a screen. Since the parts constituting the projection lens for projection are arranged in a U-shape, the outer size of the optical system after the light source can be reduced, and the entire apparatus can be reduced in size. According to the second aspect of the present invention, since the light beam splitting portion has an emission shape similar to that of the image display element and has a rod shape, the outer size can be reduced.

According to a third aspect of the present invention, there is provided an optical path length Y from the polarization conversion element to a total reflection mirror for bending the optical path in the color separation optical system, and an optical path length from the total reflection mirror to the color synthesis optical system. When the ratio to the optical path length X is Y: X = 0.8: 1 or less, the external size of the optical system after the white light source can be reduced. According to the present invention, since the light path is deflected between the polarizing element unit and the integrated relay lens unit, the lighting direction of the light source and the projection direction of the projection lens can be made opposite to each other. Can be downsized.

According to a fifth aspect of the present invention, there is provided a white light source having a reflecting mirror, a glass rod integrator provided in line with the white light source, and a plurality of wavelength-selective deflecting means. One side of at least one wavelength-selective deflecting means of the polarizing means is arranged closer to the optical axis of the reflecting mirror than the outer edge of the reflecting mirror, so that the outer shape of the optical system after the white light source can be reduced. In addition, the entire device can be downsized. According to a sixth aspect of the present invention, the reflecting mirror is an elliptical mirror, and the white light source light is condensed near the glass rod integrator, thereby maximizing the size reduction of the glass rod integrator. And the space can be used effectively. . According to the seventh aspect of the present invention, since a partition is provided between the glass rod integrator and the wavelength-selective deflecting means, it is possible to prevent light shielding and thermal effects on optical components.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a schematic sectional view of a liquid crystal projection display device according to the present embodiment, and FIG. 2 is a side view as viewed from the direction of arrow A in FIG. In the figure, reference numeral 21 denotes a light source unit having an elliptical mirror 21a and generating white light, and 22 denotes a condensing lens, which is disposed in front of the light source 21 and generates a secondary light source image. . Reference numeral 23 denotes a glass rod integrator having a rod-like shape with a rectangular cross section.
2 at the front. Numeral 24 denotes an imaging relay lens unit which is arranged in front of the glass rod integrator 23 and focuses on each liquid crystal display element of image display element units 30a, 30b and 30c described later. Reference numeral 25 denotes a polarization conversion element that aligns the light beam in a predetermined change direction and changes the optical path by 90 degrees. 26 is an integrated relay lens.

Reference numeral 27 denotes a first dichroic mirror as a wavelength-selective deflecting means, which is disposed in front of the integrated relay lens 26. Reference numeral 28 denotes a second dichroic mirror as a wavelength-selective deflecting means, which is arranged on the reflection optical path of the first dichroic mirror 27. One edge side of the first and second dichroic mirrors 27 and 28 is disposed close to the optical axis of the mirror 21a beyond the outer edge of the elliptical mirror 21a. Reference numeral 29 denotes a first total reflection mirror, which is disposed on a transmission optical path of the first dichroic mirror 27. Reference numerals 30a, 30b, and 30c denote image display elements including red, blue, and green liquid crystal display elements and capacitors, respectively, on the reflection light path of the first total reflection mirror 29 and the reflection light path of the second dichroic mirror 28, respectively. , On the transmission optical path of the second dichroic mirror 28.

Reference numeral 31 denotes a third dichroic mirror as a wavelength-selective deflecting means, and the image display element units 30a and 30
0b. Reference numeral 32 denotes a second total reflection mirror, which is arranged in front of the image display element unit 30c.
Reference numeral 33 denotes a color synthesizing optical element having a dichroic film for synthesizing each color light, and the third dichroic mirror 31
And the second total reflection mirror 32. Three
A projection lens 4 is disposed in front of the color combining optical element 33. Reference numeral 35 denotes an apparatus main body which holds the above optical components, and includes the light source unit 21, the glass rod integrator 23, the first, second, and third dichroic mirrors 2.
7, 28, 31 and the image display element sections 30a, 30
A partition wall 35a is provided between the color separation optical system including b and 30c. An exhaust fan 36 is provided outside the apparatus main body 35 on the rear side of the light source 21, and an intake fan 37 is provided on one side of the apparatus main body 35 in which the image display elements 30a, 30b, 30c are arranged. It is provided outside the side. The positions of the exhaust fan 36 and the intake fan 37 may be changed depending on the layout of the entire apparatus.

Therefore, the components from the light source section 21 to the polarization conversion element 25 and the integrated relay lens 26 include:
The components including the color separation optical system including the image display elements 30a, 30b, and 30c, the synthesis optical system including the color synthesis optical element 33, and the projection lens 34 are juxtaposed and set in a U-shape. The optical path length from the polarization conversion element 25 to the first total reflection mirror 29 is represented by Y, and the optical path length from the first total reflection mirror 29 to the composite optical element 33 is represented by X.
Then, it is set so that Y: X = 0.8: 1 or less.

In this embodiment having the above structure, the light emitted from the light source unit 21 is condensed by the condensing lens 22 by the elliptical mirror 21a to generate a secondary light source image, and the luminous flux of this secondary light source image is glass. The rod integrator 23 divides the light into a plurality of luminous fluxes to generate a plurality of tertiary light source images.
Each of the liquid crystal display elements 30b and 30c is focused.
At this time, the luminous flux converts the non-polarized luminous flux into a luminous flux having a uniform polarization plane in a predetermined polarization direction in the polarization conversion element 25 and changes the optical path by 90 degrees. The emitted light flux is superimposed on a predetermined position, color-separated into, for example, an optical path for red light and an optical path for green and blue light by a first dichroic mirror 27, and further separated into green light and blue light by a second dichroic mirror 28. The light is decomposed into light paths, and each color light is
Light beams passing through the third dichroic mirror 31 and the second total reflection mirror 32 passing through 0a, 30b, and 30c are combined by a combining optical element 33, and an image is projected on a screen by a projection lens. The cooling of the light source unit 31 and the like is performed by the exhaust fan 36 and the intake fan 37. With such a configuration, since the outer shape of the optical system after the light source unit can be reduced, the size of the entire apparatus can be reduced.

FIG. 3 shows a second embodiment of the present invention. FIG. 3 is a schematic sectional view of a projection display device using liquid crystal. In the figure, 41 is a light source unit having an elliptical mirror 41a and generating white light, and 42 is a light collecting lens, which is disposed in front of the light source 41 and generates a secondary light source image. . 43 is a glass rod integrator,
It is arranged in front of the condenser lens 42. Reference numeral 44 denotes an imaging relay lens unit, and the glass rod integrator 43
Image display element sections 50a, 50
Each of the liquid crystal display elements 0b and 50c is focused. A polarization conversion element 45 aligns the light beam in a predetermined polarization direction and changes the optical path by 90 degrees. 46 is an integrated relay lens.

Reference numeral 47 denotes a first dichroic mirror as a wavelength-selective deflecting means, which is disposed in front of the integrated relay lens 46, and has one edge side near the optical axis of the mirror 41a beyond the outer edge of the elliptical mirror 41a. They are located close together. Reference numeral 48 denotes a second dichroic mirror as a wavelength-selective deflecting means, which is arranged on the transmission optical path of the first dichroic mirror 47. Reference numeral 49 denotes a relay lens, which is arranged on the transmitted light path of the second dichroic mirror 48. Reference numeral 50 denotes a first total reflection mirror,
Reference numeral 51 denotes a second total reflection mirror, which is disposed opposite to the first total reflection mirror 50, and reference numeral 52 denotes a third total reflection mirror, which reflects the first dichroic mirror 47. It is arranged on the optical path, and one edge side thereof is arranged close to the optical axis of the elliptical mirror 41a beyond the outer edge of the elliptical mirror 41a, so that each optical path is changed by 90 degrees.

Numerals 53a, 53b and 53c denote condenser lenses, and 54a, 54b and 54c denote image display elements composed of red, green and blue liquid crystal, respectively. The second total reflection mirror 5
The first and second dichroic mirrors 48 and 48 are disposed on the reflected light path of the second dichroic mirror 48 and the reflected light path of the third total reflection mirror 52, respectively. Reference numeral 55 denotes a cross dichroic prism for synthesizing each color light from the image display element unit. 56
Is a projection lens, and the cross dichroic prism 55
It is located in front of. Reference numeral 57 denotes an apparatus main body which holds the above optical components. The light source section 41, the glass rod integrator 43, the first and second dichroic mirrors 47 and 48, and the image display elements 54a and 54 are provided.
A partition 57a is provided between the color separation optical system including b and 54c. Reference numeral 58 denotes an exhaust fan, which is provided outside the device main body 57 on the side of the light source 21. Reference numeral 59 denotes an intake fan, which includes an image display element portion including the cross dichroic prism 55. It is provided outside one side. The positions of the exhaust fan 58 and the intake fan 59 may be changed depending on the layout of the entire apparatus. Therefore, a composite optical system including the components from the light source unit 41 to the polarization conversion element 45 and the integrated relay lens 46, the color separation optical system including the image display elements 30a, 30b, 30c, etc., and the cross dichroic prism 55, and projection. The optical system parts up to the lens 56 are juxtaposed in parallel and set in a U-shape.

In this embodiment having the above configuration, the first
Similarly to the embodiment, a plurality of tertiary light source images are generated by a condenser lens 42 and a glass rod integrator 43 for light emitted from a light source unit 41 by an elliptical mirror 41a, and an imaging relay lens unit 44 and a polarization conversion element 45 , Converts the non-polarized light beam into a light beam having a uniform polarization plane in a predetermined polarization direction, changes the optical path by 90 degrees, and superimposes the light beams emitted from the plurality of tertiary light source images by the integrated relay lens 46 at a predetermined position. Then, the first dichroic mirror 47 separates the light into, for example, red light, green light, and blue light, and the red light reflected by the first dichroic mirror 47 is reflected by the third total reflection mirror 5.
2, the light path is changed and passes through the condenser lens 53c and the image display element 54c. On the other hand, the green and blue lights are color-separated by the second dichroic mirror 48, and one is reflected and reflected by the condenser lens 53b and the image display element 5c.
4b and the other one is transmitted through the relay lens 49,
The optical path is changed by the total reflection mirror 50o, passes through the condenser lens 53b and the image display element 54b, passes through the condenser lens 53a and the image display element 54a, and each color light is synthesized by the cross dichroic prism 55, and is projected on the screen by the projection lens 56. Is projected. The cooling of the light source 41 and the like is performed by the exhaust fan 57 and the intake fan 58. In the projection display device using the cross dichroic prism configured as described above, the width of the device can be reduced, and the device can be reduced in size and weight.

FIG. 4 shows a third embodiment of the present invention. FIG. 4 is a schematic sectional view of a liquid crystal projection display device, in which a glass rod integrator is used for a single-plate projection display device. In the figure, 61 is a light source for generating white light, and 62 is a light source 6 disposed at a focal position.
1 is an elliptical mirror 62. A condensing lens 63 is disposed in front of the light source 61 and generates a secondary light source image. Reference numeral 64 denotes a glass rod integrator, which is arranged in front of the condenser lens 63. 65
Is a relay lens portion, which is arranged in front of the glass rod 43 to obtain parallel light. 66a and 66b are total reflection mirrors for deflecting an optical path, and deflect the parallel light from the relay lens unit 65 by 180 degrees. Reference numeral 67 denotes a Fresnel lens, which is disposed in front of the total reflection mirror 66b. 68G, 68
R and 68B are dichroic mirrors as wavelength-selective deflecting means, which are disposed in front of the Fresnel lens 67,
Each of the colors is separated into green, red, and blue, and one end side thereof is disposed near the optical axis of the elliptical mirror 62 beyond the outer edge of the elliptical mirror 62. Reference numeral 69 denotes a liquid crystal color display device with a micro lens, which is disposed on the reflection side of the dichroic mirrors 68G, 68R, 68B. A projection lens 70 is provided in front of the liquid crystal color display element 68. A partition (not shown) is provided between the light source 61 and the glass rod integrator 64 and between the dichroic mirrors 68G, 68R, and 68B as in the first and second embodiments.

In this embodiment having the above-described structure, the elliptical mirror 62 is used.
The light flux from the white light source 61 at the focal position is reflected by the elliptical mirror 62 and condensed at another focal position, and a plurality of secondary light sources are generated by the condenser lens 63 and the glass rod integrator 64. The light is converted into parallel light through the lens 65, the total reflection mirrors 66a and 66b, and the Fresnel lens 67 to illuminate the liquid crystal color display element 69 in a rectangular shape.
By the way, the Fresnel lens 67 and the liquid crystal color display element 6
9 are provided with dichroic mirrors 68G, 68R, and 68B for selectively reflecting and deflecting green, red, and blue color lights, so that the color lights correspond to the liquid crystal color display element 69 at different angles. The green, red and blue pixels are illuminated and projected on a screen (not shown) by the projection lens 70.

In this embodiment, since the elliptical mirror 62 collects the elliptical light, the aperture of the glass rod integrator 64 can be made smaller, and the interference space with other parts is larger than the conventional fly-eye lens array plate. You can take a part. Therefore, it is possible to bring the optical components after the glass rod close without mechanical interference. Among the other optical components, components having a large outer size are dichroic mirrors 68G, 68R and 68B which are wavelength-selective deflecting means in the vicinity of the liquid crystal color display element 69. Even if the center of the optical axis is difficult, the dichroic mirrors 68G and 68G are used. 68R, 6
The effective portion of 8B is made to approach the glass rod integrator 64 having a smaller opening, so that the space can be effectively used. As a result, the width of the projection display device can be reduced, and the size and weight can be reduced.

[0025]

As described above, according to the present invention, there is provided a light source for emitting white light and a light source for condensing the light from the light source.
A condensing unit for generating a secondary light source image, a light beam splitting unit for splitting a light beam from the light collecting unit into a plurality of light beams, a relay lens unit for forming a plurality of tertiary light source images from the light beam splitting unit, and polarization conversion An illumination system portion including an element and an integrated relay lens unit for aligning a plurality of tertiary light source images at predetermined positions; a color separation optical system for separating a light beam from the illumination system portion into red, green, and blue, and an image The arrangement of the display element, the color combining optical system that combines the color-separated luminous flux, and the projection lens that projects onto the screen is arranged in a U-shape, so that the entire device can be reduced in size. According to the second aspect of the present invention, since the light beam splitting portion has an emission shape similar to that of the image display element and has a rod shape, the device can be reduced in size and weight.

According to a third aspect of the present invention, there is provided an optical path length Y from the polarization conversion element to a total reflection mirror for bending the optical path in the color separation optical system, and an optical path length from the total reflection mirror to the color synthesis optical system. When the ratio to the optical path length X is Y: X = 0.8: 1 or less, the external size of the optical system after the white light source can be reduced. According to the present invention, since the light path is deflected between the polarizing element unit and the integrated relay lens unit, the lighting direction of the light source and the projection direction of the projection lens can be made opposite to each other. Can be downsized.

According to a fifth aspect of the present invention, there is provided a white light source having a reflecting mirror, a glass rod integrator provided in line with the white light source, and a plurality of wavelength selective deflecting means. One side of at least one wavelength-selective deflecting means of the polarizing means is arranged closer to the optical axis of the reflecting mirror than the outer edge of the reflecting mirror, so that the entire apparatus can be downsized. According to a sixth aspect of the present invention, the reflecting mirror is an elliptical mirror, and the white light source light is condensed near the glass rod integrator, thereby maximizing the size reduction of the glass rod integrator. And the space can be used effectively. According to the seventh aspect of the present invention, since a partition is provided between the glass rod integrator and the wavelength-selective deflecting means, it is possible to prevent light shielding and thermal effects on optical components.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view of a liquid crystal projection display device according to a first embodiment of the present invention.

FIG. 2 is a side view as seen from the direction of arrow A in FIG.

FIG. 3 is a schematic sectional view of a liquid crystal projection display device according to a second embodiment of the present invention.

FIG. 4 is a schematic sectional view of a liquid crystal projection display device according to a third embodiment of the present invention.

FIG. 5 is a schematic sectional view of a conventional liquid crystal projection display device.

[Explanation of symbols]

21, 41... Light source unit, 21a, 41a, 62... Elliptical mirror, 22, 42, 63.
3,64 glass rod integrator, 24,44
..Imaging relay lens part, 25,45..Polarization conversion element, 26,46..Integrated relay lens, 27,47 ..
1st dichroic mirror, 28, 48 second dichroic mirror, 29, 50 first total reflection mirror, 3
0a, 30b, 30c image display element section, 31 third dichroic mirror, 32, 51 second total reflection mirror, 33 color synthesis optical element, 34, 56 projection lens, 35, 57 ..The device body, 35a, 57a .. partition, 49..relay lens, 52..second total reflection mirror, 54a, 54b, 54c..image display element, 55 ..
・ Cross dichroic prism, 61 ・ ・ Light source, 65
..Relay lenses, 66a, 66b..Total reflection mirror,
67 Fresnel lens, 68G, 68R, 68B
Dichroic mirror, 69 · · · LCD color display element,
70 ... Projection lens.

Claims (7)

[Claims] A light source that emits white light, a light condensing unit that condenses light from the light source to generate a secondary light source image, a light beam splitting unit that splits a light beam from the light collecting unit into a plurality of light beams, An illumination system portion including a relay lens unit that forms a plurality of tertiary light source images from the light beam splitting unit, a polarization conversion element, and an integrated relay lens unit that aligns the plurality of tertiary light source images at predetermined positions; A color separation optical system that separates the light beam from the illumination system into red, green, and blue, a color display optical device that combines the image display device, a color synthesis optical system that combines the separated light beam, and a projection lens that projects the light onto a screen. , A projection display device arranged in a U-shape. 2. The projection display device according to claim 1, wherein the light beam splitting portion has a light emission shape similar to the image display element and has a rod shape. 3. The ratio of the optical path length Y from the polarization conversion element to the total reflection mirror for bending the optical path in the color separation optical system and the optical path length X from the total reflection mirror to the color combining optical system is as follows.
3. The projection display device according to claim 1, wherein Y: X = 0.8: 1 or less. 4. An optical path deflector between said polarizing element section and said integrated relay lens section.
The projection display device as described in the above. 5. A white light source having a reflecting mirror, a glass rod integrator arranged in line with the white light source, and a plurality of wavelength-selective deflecting means, wherein at least one of the wavelength-selective polarizing means is provided. A projection display device, wherein one side of the wavelength-selective deflecting means is disposed closer to the optical axis of the reflector than the outer edge of the reflector. 6. The projection display device according to claim 5, wherein said reflecting mirror is an elliptical mirror and focuses said white light source light near said glass rod integrator. 7. The projection display device according to claim 5, wherein a partition is provided between said glass rod integrator and said wavelength-selective deflection means.