JP2005208132A - Projection type display device and manufacturing method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To design/develop two or more types of light valves different in size by minimumly changing optical components or changing their layout. <P>SOLUTION: The projection type display device has an optical unit 601 that includes the light valves 311, 321, and 331 and a color splitting illumination part 200 for emitting illumination light to the effective illumination ares of the light valves. The light valves 311, 321, and 331 can be exchanged with light valves whose sizes are different from theirs. The disposition and the shape of a condenser lens 221 composing the color splitting illumination part 200 can be altered according to the sizes of the light valves mounted on the optical unit 601. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a projection display device that enlarges and projects an image formed by a light valve such as an LCD or DMD onto a screen, and a method for manufacturing the same.

Patent Document 1 describes a display device that spatially modulates light from a light source with a liquid crystal light valve and projects an image obtained by the modulation onto a screen. In this display device, the optical system for illuminating the liquid crystal light valve includes a negative meniscus lens having a convex surface directed toward the light source side and a biconvex lens. By adjusting the distance between these lenses, an effective area of the light valve is obtained. On the other hand, when the illumination area is not sufficient, the area can be expanded or contracted.
Japanese Patent Laid-Open No. 2002-296538

  Recently, the diversification of the size of the light valve has progressed, and accordingly, it has become necessary to design and develop the display device in accordance with the size of each light valve. For example, in liquid crystal projectors, liquid crystal light valves having a plurality of sizes with a diagonal length of about 0.1 inch are commercialized. For this reason, depending on the size of the liquid crystal light valve, it is in the situation of designing and developing the optical unit and the optical components (fly eye, polarization conversion element, condenser lens, etc.) mounted on it. There are problems such as an increase in the number of parts, an increase in the cost of parts, and the complexity of receiving and managing parts.

  By using an illumination optical system that can enlarge or reduce the illumination area in accordance with the size of the light valve, the above problem can be avoided. There exists a thing of patent document 1 mentioned above as a thing with a variable illumination area. However, the thing of patent document 1 aims at making up for the shortage of the illumination area on a design, and since there is a limit in the adjustment range, it is difficult to respond to a plurality of sizes. . In addition, until now, methods such as adjusting the illumination area by changing the size and position of the fly-eye lens have been proposed, but in each case there is a limit to the adjustment range. I can't respond. Thus, an illumination optical system that can enlarge or reduce the illumination area in accordance with the size of the light valve has not been proposed so far.

  SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and to enable a design and development corresponding to a plurality of types of light valves having different sizes with a minimum change or change in the arrangement of optical components, and a method for manufacturing the same Is to provide.

  A feature of the present invention is that in a projection display device including an optical unit including a light valve and an illumination optical system for irradiating illumination light to an effective illumination area of the light valve, the effective illumination is used as the light valve. Light bulbs of at least two sizes with different areas can be selectively used, and at least the arrangement of the condenser lenses constituting the illumination optical system can be changed according to the size of the light bulb used. There is.

  According to the above configuration, the optical unit is adapted to a plurality of size light valves. Therefore, it is not necessary to design an optical unit for each light valve size as in the prior art.

  Moreover, according to said structure, it can respond to the light valve of a different size only by changing arrangement | positioning of a condensing lens, and it is not necessary to change other optical components, such as a fly eye and a polarization conversion element. . As described above, it is possible to commonly use some of the optical components that have been conventionally required for each light valve size.

  According to the present invention as described above, since the optical unit and a part of the optical components mounted on the optical unit can be commonly used in a plurality of size light valves, the number of man-hours for development compared to the conventional technology is increased. -It is possible to greatly reduce the cost and the unit price of parts, and it is easy to receive and manage parts.

  Next, embodiments of the present invention will be described in detail with reference to the drawings.

(Embodiment 1)
The projection display device of this embodiment can be equipped with two types of light valves of different sizes, and has a configuration in which the shape and arrangement of the condenser lens can be changed according to each size. FIG. 1A shows a first manufacturing mode of the projection display apparatus according to the first embodiment of the present invention, and FIG. 1B shows a second manufacturing mode. The configurations shown in FIGS. 1A and 1B are the same except that the arrangement and shape of the condenser lenses are different.

  First, a basic configuration of the projection display apparatus according to the present embodiment will be described with reference to FIG. The projection display apparatus according to the present embodiment includes an optical unit 601 on which the light source unit 100, the color separation illumination unit 200, the image display unit 300, and the color composition imaging unit 400 are mounted. The optical unit 601 is configured such that the whole or a part of the color separation illumination unit 200 and the color composition imaging unit 400 can be exchanged. The detailed configuration of each component will be described below.

<Light source unit 100>
The light source unit 100 includes a light source 101, a reflecting mirror 102 for efficiently collecting light from the light source 101, and a cover glass 103 that efficiently transmits light from the reflecting mirror 102 to the color separation illumination unit 200.

<Color separation lighting unit 200>
The color separation illumination unit 200 includes a pair of fly eyes 201 and 202 for uniformly illuminating the light valves 311, 321 and 331 constituting the image display unit 300 with light from the light source unit 100. In the traveling direction of the light passing through each fly eye 201, 202, the light is efficiently illuminated on the polarization conversion element 203 for aligning random polarized light emitted from the light source unit 100 with linearly polarized light and each light valve. And two dichroic mirrors 204 and 205 for separating white light emitted from the light source unit 100 into red (R), green (G), and blue (B) light. .

  The first dichroic mirror 204 is arranged so that the light (white) that has passed through the condenser lens 220 is incident at an incident angle of 45 degrees. Among the incident light (white), G light and R light are transmitted. Go straight and reflect the B light in the 90 degree direction. The second dichroic mirror 205 is arranged so that the G light and R light that have traveled straight through the dichroic mirror 204 are incident at an incident angle of 45 degrees, the G light is reflected in the 90-degree direction, and the R light travels straight. .

  A condenser lens 208 is disposed in the traveling direction of the B light reflected by the dichroic mirror 204, and a condenser lens 209 is disposed in the traveling direction of the G light reflected by the dichroic mirror 205. The relay lens 206 and the reflection mirror 212 are sequentially arranged in the traveling direction of the R light that has traveled straight through the dichroic mirror 204, and the relay lens 207 and the reflecting mirror 213 are sequentially disposed in the traveling direction of the R light reflected by the reflecting mirror 212. The condenser lens 210 is disposed in the traveling direction of the R light that is disposed and reflected by the reflecting mirror 213. Since the optical path of red light is longer than the other optical paths, two relay lenses 206 and 206 are provided to correct this. An illumination distribution equivalent to the vicinity of the light valves 311 and 321 on the other optical paths is formed in the vicinity of the first relay lens 206, and the transfer illumination is applied to the light valve 331 by the power of the second relay lens 207. Do. The condenser lenses 208, 209, and 210 are for efficiently making light incident on the exit pupil position of the projection lens 401.

<Image display unit 300>
The image display unit 300 includes light valves 310, 320, and 330 for performing light modulation that operates based on electric signals, and polarizing plates 301, 302, and 303 for aligning polarization components of light incident on the light valves, It has polarizing plates 304, 305, and 306 for performing gradation display of light modulated by each light valve. As the light valves 310, 320, 330, for example, liquid crystal light valves can be applied.

<Color composition imaging unit 400>
The color composition imaging unit 400 includes a cross dichroic prism 410 provided at a position where light passing through the light valves 310, 320, and 330 intersects, and a projection lens 401 disposed on the exit surface side of the cross dichroic prism 410. And have. The projection lens 401 enlarges and projects an image formed by each of the light valves 310, 320, and 330 onto the projection screen 501, and can be a zoom type projection lens that can change the projection screen size at the same projection distance. Consists of either a fixed-focus projection lens whose projection screen size cannot be changed.

  Next, a display operation in the projection display apparatus of this embodiment will be briefly described.

  Random polarized light (white light) emitted from the light source 101 is reflected directly or by the reflecting mirror 102 and passes through the cover glass 103. When the reflecting mirror 102 is a parabolic mirror, the cover glass 103 has a double-sided planar structure, and when the reflecting mirror 102 is an elliptical mirror, the cover glass 103 has a lens structure having negative power. In any structure, the light that has passed through the cover glass 103 becomes substantially parallel light and is efficiently incident on the color separation illumination unit 200.

  In the color separation illumination unit 20, the light from the light source unit 100 sequentially passes through the fly eyes 201 and 202 and the polarization conversion element 203. At this time, in the vicinity of the fly eye 202, the light source image is projected on the vicinity of each cell optical axis of the fly eye 201. The polarization conversion element 203 uses the interval between the projected light source images to align the polarized light of the light flux from each cell with linearly polarized light.

  The linearly polarized light emitted from the polarization conversion element 203 passes through the condenser lens 220 and enters the dichroic mirror 204. In the dichroic mirror 204, B light of the incident light is separated into R and G lights. The B light is reflected by the reflection mirror 211, and the reflected light sequentially passes through the condenser lens 208 and the polarizing plate 301 to irradiate the effective illumination area of the light valve 311. On the other hand, the R / G light is separated into R light and G light by the dichroic mirror 204. The G light sequentially passes through the condenser lens 209 and the polarizing plate 302 and irradiates the effective illumination area of the light valve 321. The R light passes through the relay lens 206, is reflected by the reflection mirror 212, further passes through the relay lens 207, and is reflected by the reflection mirror 213. The reflected light from the reflection mirror 213 sequentially passes through the condenser lens 210 and the polarizing plate 303 and irradiates the effective illumination area of the light valve 331.

  Each of the light valves 310, 320, and 330 is supplied with a signal related to a corresponding color generated based on a video signal supplied from the outside, and performs light modulation in accordance with the input signal. Light incident on the light valves 310, 320, and 330 is cut by the polarizing plates 301, 302, and 303, and components that have not been sufficiently converted to linearly polarized light out of the incident light already aligned with the linearly polarized light are cut off. The Thereby, the contrast of an image | video can be raised. The modulated light from each light valve 310, 320, 330 passes through the polarizing plates 304, 305, 306, respectively, and enters the cross dichroic prism 410 of the color composition imaging unit 400. In each of the polarizing plates 304, 305, and 306, gradation display is performed and the contrast of the image is increased.

  In the color composition imaging unit 400, the light information modulated by the light valves 310, 320, and 330 is synthesized by the cross dichroic prism 410 and enlarged and projected on the projection screen 501 by the projection lens 401. In this way, a color display image is obtained.

  Each configuration of the light source unit 100, the color separation illumination unit 200, the image display unit 300, and the color composition imaging unit 400 described above is basically the same as that of a well-known projection display device. The projection display device according to the present embodiment is characterized in that in the image display unit 300, two types of light valves can be mounted as three light valves arranged in each of the R optical path, the G optical path, and the B optical path. In addition, the optical unit 601 is configured so that the shape and arrangement of the condenser lens of the color separation illumination unit 200 can be changed according to the size of the light valve.

  More specifically, the optical unit 601 includes two holding portions 221a and 222a each including, for example, a groove for holding a condenser lens between the polarization conversion element 203 and the first dichroic mirror 204. The holding unit 221a is located on the polarization conversion element 203 side, and the holding unit 222a is located on the dichroic mirror 204 side. When the light valves 311, 321, and 331, which are the first light valves having a large effective display area (large light valves), are used, as shown in FIG. A condenser lens 221 having a positive power is attached. On the other hand, when the light valves 312, 322, and 332, which are second light valves having a small effective display area (light valves having a small size), are used, as shown in FIG. A condenser lens 222 having a positive power larger than that of the condenser lens 221 is attached to 222a.

  The position of the holding unit 221a and the shape of the condenser lens 221 (corresponding to the lens power) are set in advance so that the effective illumination area of the first light valve can be efficiently illuminated. Similarly, the position of the holding part 222a and the shape of the condenser lens 222 are also set in advance so that the effective illumination area of the second light valve can be efficiently illuminated. These conditions can be calculated using optical simulation software.

  As an example of the optical simulation result when the B optical path is included as the branching optical path, FIG. 2A shows the conditions of the optical component arrangement when the first light valve having a diagonal length of 0.7 inches is used. FIG. 2B shows the conditions for arranging optical components when a second light valve having a diagonal length of 0.55 inches is used. 2 (a) and 2 (b), the “Surf” column indicates the number of surfaces, “OBJ” indicates the object surface, “IMA” indicates the image surface, and “STO” indicates the restricted aperture surface. Show. Here, on the optical simulation software, “OBJ” is set to infinity, “IMA” is set to the image plane of the light valve, and “STO” is set to a position equidistant from the exit surface of the polarization conversion element. Each condition is calculated. In the “Radius” column, the R shape (curvature radius) of the glass sphere arranged is indicated in mm. “Infinity” in the “Radius” column indicates a plane. In the “Thickness” column, the thickness or interval of the glass parts is indicated in mm. “Infinity” in the “Thickness” column indicates infinity. In the “Glass” column, the glass material name of the glass part is shown. In this “Glass” column, a blank column indicates a space. In the “Diameter” column, the effective diameter is indicated in mm. In both the examples of FIGS. 2A and 2B, the effective diameter of the STO surface is φ42, the maximum angle of view is 5.65, and the STO surface is 2 mm from the exit surface of the polarization conversion element.

  In the arrangement of the optical components in the case of the first light valve (0.7 inches) shown in FIG. 2A, the condenser lens 221 has a sphere R of the incident surface of 73.93 mm and a sphere R of the output surface of −1082. It is composed of glass material “E-F2” having a thickness of .86 mm and a thickness of 8 mm. The condenser lens 208 is made of a glass material “BK7” having a sphere R of 37.12 mm on the incident surface, a flat exit surface, and a thickness of 4 mm. The distance between the condenser lens 221 and the condenser lens 208 is 94 mm in terms of a linear distance. The distance from the exit surface of the polarization conversion element to the entrance surface of the condenser lens 221 is 2 mm (= 2 mm + 0 mm).

  On the other hand, in the optical component arrangement in the case of the second light valve (0.55 inch) shown in FIG. 2B, the condenser lens 222 has a sphere R of 60.91 mm on the entrance surface and a sphere R on the exit surface. It is composed of a glass material “E-F2” having a thickness of −819.34 mm and a thickness of 4 mm. The condenser lens 208 is made of a glass material “BK7” having a sphere R of 31.16 mm on the entrance surface, a flat exit surface, and a thickness of 4 mm. The distance between the condenser lens 222 and the condenser lens is 73.3 mm in terms of linear distance. The distance from the exit surface of the polarization conversion element to the entrance surface of the condenser lens 222 is 22.7 mm (= 2 mm + 20.7 mm).

  The optical simulation result when the G optical path is included as the branch optical path is also exactly the same as the arrangement of the optical components in FIGS. 2 (a) and 2 (b). The R optical path has a longer optical path length than the other G optical paths and B optical paths, and includes a pair of relay lenses 206 and 207 in the optical path, so that the R optical path is included as a branched optical path. Strictly speaking, the optical simulation result in this case is not the optical component arrangement shown in FIGS. 2 (a) and 2 (b). However, an illumination distribution equivalent to that in the vicinity of the light valve on the other optical path is formed in the vicinity of the first relay lens 206, and transfer illumination is performed on the light valve 331 by the power of the second relay lens 207. Because of this configuration, when considering the shape of the condensing lens, it is possible to design with a simple configuration excluding these relay lenses 206 and 207, and the optical simulation result in that case is shown in FIG. And it is basically the same as the arrangement of the optical components in FIG.

  In both cases of FIGS. 2A and 2B, it is possible to secure an illumination area with a substantially equivalent margin with respect to the light valve. Further, it is not necessary to change the position and size of each fly-eye lens and polarization conversion element. Furthermore, the first fly eye may be designed so that the maximum angle (at the diagonal position) of the light emitted from the second fly eye is 5.6 degrees regardless of the cell size. .

  In the above example, the condenser lens is used when a 0.7-inch light valve is used (FIG. 2A) and when a 0.55-inch light valve is used (FIG. 2B). Although the focal length of the condenser lens is changed by changing the sphere R, the sphere R of the condenser lens may be the same in both arrangement examples.

(Embodiment 2)
The projection display device according to the second embodiment of the present invention can also be mounted with two types of light valves of different sizes, but the number and arrangement of the condenser lenses can be changed according to each size. It differs from that of the first embodiment described above in that it has a configuration. FIG. 3A shows a first manufacturing form of the projection display device of this embodiment, and FIG. 3B shows a second manufacturing form. The configurations shown in FIGS. 3A and 3B are the same except that the number and arrangement of the condenser lenses are different. Also, in FIG. 3 (a) and FIG. 3 (b), the same components as those shown in FIG. 1 (a) and FIG. Detailed explanation will be omitted.

  The projection display device according to the present embodiment is characterized in that in the image display unit 300, two types of light valves can be mounted as three light valves arranged in each of the R optical path, the G optical path, and the B optical path. In addition, the optical unit 601 is configured so that the number and arrangement of the condenser lenses of the color separation illumination unit 200 can be changed according to the size of the light valve.

  Specifically, the optical unit 601 has two holding portions 221a and 221b for holding the condenser lens 221 between the polarization conversion element 203 and the dichroic mirror 204, and the dichroic mirror 204 and the reflection mirror. 211 has a holding portion 231a for holding the condenser lens 231 and a holding portion 232a for holding the condenser lens 232 between the dichroic mirror 204 and the reflecting mirror 211. The holding unit 221a is located on the polarization conversion element 203 side, and the holding unit 221b is located on the dichroic mirror 204 side.

  When the light valves 311, 321, and 331, which are the first light valves having a large effective display area (large light valves), are used, the holding unit 221 a of the optical unit 601 is connected to the holding unit 221 a as shown in FIG. A condenser lens 221 having a positive power is attached. On the other hand, when the light valves 312, 322, and 332, which are second light valves having a small effective display area (light valves having a small size), are used instead of the light valves 311, 321, and 331, FIG. As shown, the condenser lens 221 is attached to the holder 221b, the condenser lens 231 is attached to the holder 231a, and the condenser lens 232 is attached to the holder 232a. The condensing lenses 231 and 232 are lenses having the same shape and positive power.

  The position of the holding portion 221a and the shape of the condenser lens 221 are set in advance so as to efficiently illuminate the effective illumination area of the first light valve. Similarly, the positions of the holding portions 222a, 231a, and 232a and the shapes of the condenser lenses 231 and 232 can efficiently illuminate the effective illumination area of the second light valve in a state including the condenser lens 221. Conditions are set in advance so that they can be used. These conditions can also be calculated using optical simulation software.

  As an example of the optical simulation result when the B optical path is included as a branching optical path, FIG. 4A shows the conditions of the optical component arrangement when the first light valve having a diagonal length of 0.7 inches is used FIG. 4B shows the conditions for the arrangement of optical components when a second light valve having a diagonal length of 0.55 inches is used. In both the examples of FIGS. 4A and 4B, the effective diameter of the STO surface is φ42, the maximum angle of view is 5.6, and the position 2 mm from the exit surface of the polarization conversion element is the STO surface. The items in each column in FIGS. 4A and 4B are the same as those shown in FIGS. 2A and 2B, and the description thereof is omitted here.

  In the arrangement of the optical components in the case of the first light valve (0.7 inch) shown in FIG. 4A, the condenser lens 221 has a sphere R of the entrance surface of 75.33 mm and a sphere R of the exit surface of -844. .94 mm, 8 mm thick glass material “E-F2”. The condenser lens 208 is made of a glass material “BK7” having a sphere R of 37.14 mm on the incident surface, a flat exit surface, and a thickness of 4 mm. The distance between the condenser lens 221 and the condenser lens 208 is 94.1 mm in terms of linear distance. The distance from the exit surface of the polarization conversion element to the entrance surface of the condenser lens 221 is 2 mm (= 2 mm + 0 mm).

  On the other hand, in the arrangement of the optical components in the case of the second light valve (0.55 inch) shown in FIG. 4B, the condensing lens 221 is the same as described above, and the condensing lens 231 is a sphere R on the incident / exit surface. Is made of a glass material “E-F2” having a flat emission surface and a thickness of 2 mm. The condenser lens 208 is made of a glass material “BK7” having a sphere R of an incident surface of 46.52 mm, a flat exit surface, and a thickness of 4 mm. The distance between the condenser lenses 221 and 231 is 48.9 mm in terms of a linear distance, and the distance between the condenser lens 231 and the condenser lens 208 is 31.2 mm in terms of a linear distance. The distance from the polarization conversion element exit surface to the incident surface of the condenser lens is 13.9 mm (= 2 mm + 11.9 mm).

  The optical simulation result in the case where the G optical path and the R optical path are included as the branching optical path is the same as the result shown in FIGS. 4A and 4B. However, in the case of the R optical path, as described above, the result is an arrangement in which the portion relating to the relay lens is omitted.

  In both cases of FIG. 4A and FIG. 4B, as in the first embodiment, it is possible to secure an illumination area with substantially the same margin as the light valve. There is no need to change the position and size of each fly-eye lens and polarization conversion element. Note that the distance from the polarization conversion element exit surface to the entrance surface of the condenser lens is 102.1 mm in the example of FIG. 4A and 102 mm in the example of FIG. Although a rounding error of 1 mm occurs, this rounding error is not a problem in illuminating the effective illumination area of the light valve, and can be ignored. Therefore, even if the position of the polarization conversion element in FIG. 4A and the position of the polarization conversion element in FIG. 4B are the same, there is no problem.

  Further, the sphere R of the condenser lens may be the same when a 0.7 inch light valve is used and when a 0.55 inch light valve is used.

(Embodiment 3)
The projection display device according to the third embodiment of the present invention can also be equipped with two types of light valves of different sizes, and can be configured to change the number and arrangement of condenser lenses according to each size. However, the second embodiment is different from the second embodiment in that a condensing lens having negative power is used as the condensing lenses 231 and 232. FIG. 5A shows a first manufacturing mode of the projection display apparatus of this embodiment, and FIG. 5B shows a second manufacturing mode. The configurations shown in FIGS. 5A and 5B are the same except that the number and arrangement of the condenser lenses are different. 5 (a) and 5 (b), the same components as those shown in FIGS. 3 (a) and 3 (b) are denoted by the same reference numerals, and here, the details of the same portions are described. Detailed explanation will be omitted.

  When the light valves 311, 321, and 331, which are the first light valves having a large effective display area (large light valves), are used, the holding unit 221 a of the optical unit 601 has a structure as shown in FIG. The condenser lens 221 having a positive power is attached, the condenser lens 231 is attached to the holding part 231a, and the condenser lens 232 is attached to the holding part 232a. The condensing lenses 231 and 232 are lenses having the same shape with negative power. On the other hand, when the light valves 312, 322, and 332, which are second light valves (small size light valves) having a small effective display area, are used instead of the light valves 311, 321, and 331, FIG. As shown, the condenser lens 221 is attached to the holding part 221b. At this time, the condenser lenses 231 and 232 are not attached.

  The positions of the holding units 221a and 221b and the shape of the condensing lens 221 (lens power), the positions of the holding units 222a, 231a and 232a, and the shapes of the condensing lenses 231 and 232 (lens power) are as follows. And the conditions are set in advance so that the effective illumination area of the second light valve can be illuminated efficiently. These conditions can also be calculated using optical simulation software.

  As an example of the optical simulation result when the B optical path is included as the branching optical path, FIG. 6A shows the conditions of the arrangement of optical components when the first light valve having a diagonal length of 0.7 inches is used. FIG. 6B shows the optical component arrangement conditions when a second light valve having a diagonal length of 0.62 inches is used. In both the examples of FIGS. 6A and 6B, the effective diameter of the STO surface is φ42, the maximum field angle is 5.6, and the position 2 mm from the exit surface of the polarization conversion element is the STO surface. The items in each column in FIGS. 6A and 6B are the same as those shown in FIGS. 2A and 2B, and the description thereof is omitted here.

  In the arrangement of the optical components in the case of the first light valve (0.7 inch) shown in FIG. 6A, the condensing lens 221 has an incident surface sphere R of 62.54 mm and an exit surface sphere R of −2756. .04 mm, 8 mm thick glass material “E-F2”. The condenser lens 231 is made of a glass material “E-F2” having a sphere R of −31.23 mm on the entrance / exit surface, a −35.37 mm on the sphere R of the exit surface, and a thickness of 2 mm. The condenser lens 208 is made of a glass material “BK7” having a sphere R of 35.15 mm on the incident surface, a flat exit surface, and a thickness of 4 mm. The interval between the condenser lenses 221 and 231 is 45 mm in terms of linear distance. The distance between the condenser lens 231 and the condenser lens 208 is 43 mm in terms of linear distance. The distance from the exit surface of the polarization conversion element to the entrance surface of the condenser lens 221 is 2 mm (= 2 mm + 0 mm).

  On the other hand, in the arrangement of the optical components in the case of the second light valve (0.62 inch) shown in FIG. 6B, the condenser lens 221 is the same as described above, and the condenser lens 208 has a sphere R of 36 on the incident surface. It is composed of a glass material “BK7” having a flat surface and a thickness of 4 mm. The distance between the condenser lens 221 and the condenser lens 208 is 80.4 mm in terms of linear distance. The distance from the exit surface of the polarization conversion element to the entrance surface of the condenser lens 221 is 11.6 mm (= 2 mm + 9.6 mm).

  The optical simulation result when the G optical path and the R optical path are included as the branched optical paths is also the same as the results shown in FIGS. 6A and 6B. However, in the case of the R optical path, as described above, the result is an arrangement in which the portion relating to the relay lens is omitted.

  In both cases of FIG. 6 (a) and FIG. 6 (b), as in the first embodiment, it is possible to secure an illumination area with a substantially equivalent margin for the light valve, There is no need to change the position and size of each fly-eye lens and polarization conversion element. Further, the sphere R of the condenser lens may be the same when a 0.7 inch light valve is used and when a 0.55 inch light valve is used.

(Embodiment 4)
The projection display device according to the fourth embodiment of the present invention can also be equipped with two types of light valves of different sizes, but the arrangement of the two condenser lenses can be changed according to each size. This is different from that of the first embodiment described above in that it has a simple configuration. FIG. 7A shows a first manufacturing form of the projection display device of the present embodiment, and FIG. 7B shows a second manufacturing form. The configurations shown in FIGS. 7A and 7B are the same except that the arrangement of the condenser lenses is different. 7 (a) and 7 (b), the same components as those shown in FIGS. 1 (a) and 1 (b) are denoted by the same reference numerals, and here, the details of the same parts are shown. Detailed explanation will be omitted.

  The optical unit 601 includes a holding unit configured by, for example, a groove for holding the two condenser lenses 221 and 231 between the polarization conversion element 203 and the dichroic mirror 204. Although not shown, this holding means is located on the polarization conversion element 203 side, is located on the dichroic mirror 204 side, and is disposed on the dichroic mirror 204 side for holding the condenser lens 221. It consists of a second holding part for holding, and a third holding part that is located between the first and second holding parts and holds the condenser lenses 221 and 231 together. The condenser lens 221 has a negative power, and the condenser lens 231 has a positive power.

  When the light valves 311, 321, and 331, which are the first light valves having a large effective display area (large light valves), are used, as shown in FIG. 3 is attached to the holding part. On the other hand, when the light valves 312, 322, and 332, which are second light valves having a small effective display area (light valves having a small size), are used, as shown in FIG. The condenser lens 231 is attached to the second holder.

  The positions of the first to third holding portions and the shapes (lens powers) of the condenser lenses 221 and 231 are such that the effective illumination areas of the first and second light valves can be efficiently illuminated. Is set in advance. These conditions can also be calculated using optical simulation software.

  As an example of the optical simulation result when the B optical path is included as the branching optical path, FIG. 8A shows the conditions of the optical component arrangement when the first light valve having a diagonal length of 0.7 inches is used. FIG. 8B shows the optical component arrangement conditions when a second light valve having a diagonal length of 0.55 inches is used. In both the examples of FIGS. 8A and 8B, the effective diameter of the STO surface is φ42, the maximum angle of view is 6.0, and the position 2 mm from the exit surface of the polarization conversion element is the STO surface. Note that the items in each column in FIGS. 8A and 8B are the same as those shown in FIGS. 2A and 2B, and thus the description thereof is omitted here.

  In the arrangement of the optical components in the case of the first light valve (0.7 inch) shown in FIG. 8A, the condenser lens 221 has a sphere R of the incident surface of 105.52 mm and a sphere R of the output surface of 62.52 mm. It is composed of a glass material “E-F2” having a thickness of 62 mm and a thickness of 8 mm. The condenser lens 231 is made of a glass material “FD1” having a sphere R of 87.86 mm on the entrance / exit surface, a −230.69 mm sphere R of the exit surface, and a thickness of 12 mm. The condenser lens 208 is made of a glass material “BK7” having a sphere R of an incident surface of 30 mm, a flat exit surface, and a thickness of 6 mm. The interval between the condenser lenses 221 and 231 is 0.5 mm in terms of linear distance. The distance between the condenser lens 231 and the condenser lens 208 is 108.3 mm in terms of linear distance. The distance from the exit surface of the polarization conversion element to the entrance surface of the condenser lens 221 is 25.7 mm (= 2 mm + 23.7 mm).

  On the other hand, in the arrangement of the optical components in the case of the second light valve (0.62 inch) shown in FIG. 8B, the shapes and materials of the condenser lenses 221 and 231 and the condenser lens 208 are the same as described above, and only the arrangement is provided. Different. The interval between the condenser lenses 221 and 231 is 37 mm in terms of linear distance. The distance between the condenser lens 231 and the condenser lens 208 is 94.9 mm in terms of linear distance. The distance from the exit surface of the polarization conversion element to the entrance surface of the condenser lens 221 is 2.5 mm (= 2 mm + 0.5 mm).

  The optical simulation result when the G optical path and the R optical path are included as the branched optical paths is also the same as the results shown in FIGS. 8A and 8B. However, in the case of the R optical path, as described above, the result is an arrangement in which the portion relating to the relay lens is omitted.

  8A and 8B, as in the first embodiment, an illumination area with substantially the same margin as the light valve can be secured, and There is no need to change the position and size of each fly-eye lens and polarization conversion element. In this example, the rounding error described in the example shown in FIGS. 4A and 4B is slightly generated, but this does not cause a problem.

(Embodiment 5)
The projection display device according to the fifth embodiment of the present invention can also be equipped with two types of light valves of different sizes, but the arrangement of the three condenser lenses can be changed according to each size. This is different from that of the first embodiment described above in that it has a simple configuration. FIG. 9A shows a first manufacturing form of the projection display device of this embodiment, and FIG. 9B shows a second manufacturing form. The configurations shown in FIGS. 9A and 9B are the same except that the arrangement of the condenser lenses is different. Also, in FIG. 9 (a) and FIG. 9 (b), the same components as those shown in FIG. 1 (a) and FIG. Detailed explanation will be omitted.

  The optical unit 601 includes a holding unit configured by, for example, a groove for holding the three condenser lenses 221, 231 and 241 between the polarization conversion element 203 and the dichroic mirror 204. The condenser lens 221 has negative power, the condenser lens 231 has positive power, and the condenser lens 241 has positive power.

  Although not shown, the holding means is configured so that the arrangement of the condenser lenses 221, 231 and 241 can be changed according to the size of the light valve. For example, when the light valves 311, 321, and 331, which are first light valves having a large effective display area (large light valves), are used, as shown in FIG. Can be disposed on the polarization conversion element 203 side, and the condenser lens 241 can be disposed on the dichroic mirror 204 side. Further, when the light valves 312, 322, and 332, which are second light valves having a small effective display area (light valves having a small size), are used, the condenser lens 221 is polarized as shown in FIG. 9B. The condensing lenses 231 and 241 can be arranged on the dichroic mirror 204 side by being arranged on the conversion element 203 side.

  The positions and shapes (lens powers) of the condenser lenses 221, 231, and 241 are set in advance so as to efficiently illuminate the effective illumination areas of the first and second light valves. These conditions can also be calculated using optical simulation software.

  As an example of the optical simulation result when the B optical path is included as the branching optical path, FIG. 10A shows the conditions for the arrangement of optical components when the first light valve having a diagonal length of 0.7 inches is used. FIG. 10B shows the optical component arrangement conditions when the second light valve having a diagonal length of 0.55 inches is used. In both the examples of FIGS. 10A and 10B, the effective diameter of the STO surface is φ42, the maximum angle of view is 6.0, and the position 2 mm from the exit surface of the polarization conversion element is the STO surface. Note that the items in each column in FIGS. 10A and 10B are the same as those shown in FIGS. 2A and 2B, and thus the description thereof is omitted here.

  In the arrangement of the optical components in the case of the first light valve (0.7 inch) shown in FIG. 10A, the condenser lens 221 has a sphere R on the incident surface of −47.47 mm and a sphere R on the exit surface of −. It is composed of a glass material “E-F2” having a thickness of 66.26 mm and a thickness of 2 mm. The condenser lens 231 is made of a glass material “E-F2” having a sphere R of 58.24 mm on the entrance / exit surface, a −97.01 mm sphere R of the exit surface, and a thickness of 10 mm. The condensing lens 241 is made of a glass material “E-F2” having a sphere R of 84.74 mm on the entrance and exit surfaces, a 1368.90 mm sphere R on the exit surface, and a thickness of 10 mm. The condenser lens 208 is made of a glass material “BK7” having a sphere R of an incident surface of 61 mm, a flat exit surface, and a thickness of 3 mm. The interval between the condenser lenses 221 and 231 is 1 mm in terms of linear distance. The interval between the condenser lenses 231 and 241 is 33.3 mm in terms of linear distance. The interval between the condenser lens 241 and the condenser lens 208 is 70 mm in terms of linear distance. The distance from the exit surface of the polarization conversion element to the entrance surface of the condenser lens 221 is 2 mm (= 2 mm + 0 mm).

  On the other hand, in the arrangement of the optical components in the case of the second light valve (0.62 inch) shown in FIG. 10B, the shape and material of the condenser lenses 221, 231, 241 and the condenser lens 208 are the same as described above. Only the difference. The interval between the condenser lenses 221 and 231 is 32 mm in terms of linear distance. The interval between the condenser lenses 231 and 241 is 1 mm in terms of linear distance. The distance between the condenser lens 241 and the condenser lens 208 is 71.1 mm in terms of linear distance. The distance from the exit surface of the polarization conversion element to the entrance surface of the condenser lens 221 is 2 mm (= 2 mm + 0 mm).

  The optical simulation result when the G optical path and the R optical path are included as the branch optical path is also the same as the result shown in FIG. 10A and FIG. However, in the case of the R optical path, as described above, the result is an arrangement in which the portion relating to the relay lens is omitted.

  In both cases of FIG. 10A and FIG. 10B, as in the first embodiment, it is possible to secure an illumination area with a substantially equivalent margin with respect to the light valve. There is no need to change the position and size of each fly-eye lens and polarization conversion element.

In the above description, the condensing lenses 221, 231 and 241 have a combination of negative, positive and positive power, respectively, but this combination can be changed. As a combination that can be changed, when the condenser lenses 221, 231 and 241 are described in this order,
(1) Combination with negative, positive, negative power (2) Combination with negative, negative, positive power (3) Combination with positive, positive, negative power (4) Positive, negative, positive (5) Combinations with positive, negative, and negative powers are conceivable.

  Further, both or any one of the condenser lenses 231 and 241 may be arranged between the dichroic mirrors 204 and 205 and between the dichroic mirror 204 and the reflection mirror 211.

(Embodiment 6)
The projection display device according to the sixth embodiment of the present invention can also be mounted with two types of light valves having different sizes. However, two condensing lenses having different shapes depending on the size of the light valve. It differs from the thing of the 2nd Embodiment mentioned above by the point which uses 221 and 222 properly. FIG. 11A shows a first manufacturing form of the projection display device of the present embodiment, and FIG. 11B shows a second manufacturing form. In FIG. 11 (a) and FIG. 11 (b), the same parts as those shown in FIG. 3 (a) and FIG. 3 (b) are denoted by the same reference numerals, and here, detailed description of the same parts is given. Is omitted.

  The optical unit 601 is provided with a holding portion 211a for holding the condenser lens 221 on the polarization conversion element 203 side between the polarization conversion element 203 and the dichroic mirror 204, and on the dichroic mirror 204 side. A holding portion 222 a for holding 222 is provided. A holding unit 231 a for holding the condenser lens 231 is provided between the dichroic mirror 204 and the reflecting mirror 211, and a holder for holding the condenser lens 232 is provided between the dichroic mirrors 204 and 205. A portion 231a is provided. The condensing lenses 221 and 222 both have positive power, but have different shapes (lens power). The condensing lenses 231 and 232 both have positive power and the shape (lens power) is also the same.

  In the projection display device of the present embodiment, the condensing lenses 221 and 222 are selectively used according to the size of the light valve. For example, when the light valves 311, 321, and 331, which are first light valves having a large effective display area (large light valves), are used, the condenser lens 221 is held as shown in FIG. The condenser lenses 231 and 232 are attached to the holding parts 231a and 232a, respectively, while being attached to the part 221a. Further, when the light valves 312, 322, and 332, which are second light valves (small light valves) having a small effective display area, are used, the condenser lens 222 is held as shown in FIG. The condenser lenses 231 and 232 are attached to the holding parts 231a and 232a, respectively, while being attached to the part 222a.

  The positions and shapes (lens power) of the condenser lenses 221, 222, 231, 232 are set in advance so as to efficiently illuminate the effective illumination areas of the first and second light valves. . These conditions can also be calculated using optical simulation software.

  As an example of the optical simulation result when the B optical path is included as a branching optical path, FIG. 12A shows the conditions of the arrangement of optical components when the first light valve having a diagonal length of 0.7 inches is used. FIG. 12B shows the optical component arrangement conditions when a second light valve having a diagonal length of 0.55 inches is used. In both the examples of FIGS. 12A and 12B, the effective diameter of the STO surface is φ40, the maximum field angle is 6.0, and the position 2 mm from the exit surface of the polarization conversion element is the STO surface. The items in each column in FIGS. 12A and 12B are the same as those shown in FIGS. 2A and 2B, and the description thereof is omitted here.

  In the arrangement of the optical components in the case of the first light valve (0.7 inches) shown in FIG. 12A, the condenser lens 221 has a sphere R of the incident surface of 93.21 mm and a sphere R of the output surface of −1271. The glass material “E-F2” has a thickness of 38 mm and a thickness of 4.5 mm. The condensing lens 231 is made of a glass material “E-F2” having a sphere R of 46.16 mm on the entrance / exit surface, a 72.51 mm sphere R on the exit surface, and a thickness of 2 mm. The condenser lens 208 is made of a glass material “BK7” having a sphere R of an incident surface of 60 mm, a flat exit surface, and a thickness of 4 mm. The interval between the condenser lenses 221 and 231 is 74.3 mm in terms of a linear distance. The distance between the condenser lens 231 and the condenser lens 208 is 34.5 mm in terms of linear distance. The distance from the exit surface of the polarization conversion element to the entrance surface of the condenser lens 221 is 2 mm (= 2 mm + 0 mm).

  On the other hand, in the arrangement of the optical components in the case of the second light valve (0.55 inch) shown in FIG. 12B, the condenser lens 222 has an incident surface sphere R of 84.27 mm and an exit surface sphere R. -It is composed of glass material "E-F2" having a thickness of 370.85 mm and a thickness of 5.3 mm. The shape, material, and arrangement of the condenser lens 231 and the condenser lens 208 are the same as described above. The interval between the condenser lenses 222 and 231 is 45 mm in terms of linear distance. The distance from the exit surface of the polarization conversion element to the entrance surface of the condenser lens 222 is 30.5 mm (= 2 mm + 28.5 mm).

  The optical simulation results when the G optical path and the R optical path are included as the branch optical paths are also the same as the results shown in FIGS. 12 (a) and 12 (b). However, in the case of the R optical path, as described above, the result is an arrangement in which the portion relating to the relay lens is omitted.

  In both cases of FIG. 12 (a) and FIG. 12 (b), as in the first embodiment, it is possible to secure an illumination area with a substantially equivalent margin for the light valve, There is no need to change the position and size of each fly-eye lens and polarization conversion element.

  In the configuration of the present embodiment described above, the condensing lenses 221 and 222 and the condensing lenses 231 and 232 have a positive power, but the condensing lenses 221 and 222 or the condensing lens 231 are used. 232 may have negative power.

  In addition, when using a light valve with a small effective display area (the configuration shown in FIG. 11B), the condenser lens 221 is attached to the holding unit 221 instead of the condenser lens 222, and the condenser lenses 231 and 232 are effective. You may make it use what has a lens power different from what was used when the light valve with a large display area is used (form of Fig.11 (a)).

(Embodiment 7)
The projection display device according to the seventh embodiment of the present invention can also be mounted with two types of light valves of different sizes, but between the dichroic mirror 204 and the reflection mirror 211 and between the dichroic mirrors 204 and 205. In the second aspect, the condenser lens disposed on each of the light bulbs and the condenser lens disposed on the incident side of each light valve can be replaced with lenses having different shapes according to the size of the light valve. It differs from that of the embodiment. FIG. 13A shows a first manufacturing form of the projection display device of this embodiment, and FIG. 13B shows a second manufacturing form. In FIG. 13 (a) and FIG. 13 (b), the same components as those shown in FIG. 3 (a) and FIG. 3 (b) are denoted by the same reference numerals. Is omitted.

  The optical unit 601 includes a holding unit 221 a on the polarization conversion element 203 side and a holding unit 221 b on the dichroic mirror 204 side between the polarization conversion element 203 and the dichroic mirror 204. The holding portions 221 a and 221 b are for holding the condenser lens 221. In addition, a holding unit 231 a for holding one of the condensing lenses 231 and 233 having different lens powers is provided between the dichroic mirror 204 and the reflecting mirror 211. Furthermore, between the dichroic mirrors 204 and 205, a holding unit 232a for holding one of the condenser lenses 232 and 234 having different lens powers is provided. The holding portion that holds the condenser lens disposed on the incident side of each light valve can be replaced with a lens having a different shape. The condensing lenses 221, 231-234 all have a positive power.

  In the projection display device according to the present embodiment, for example, when the light valves 311, 321, and 331, which are first light valves having a large effective display area (light valves having a large size), are used, FIG. As shown, the condenser lens 221 is attached to the holding portion 221a, and the condenser lenses 231 and 232 are attached to the holding portions 231a and 232a, respectively. In this case, lenses having the first lens power are used as the condenser lenses 208 to 210. In addition, when the light valves 312, 322, and 332, which are second light valves having a small effective display area (small light valves), are used, the condenser lens 221 is held as shown in FIG. 13B. The condenser lenses 233 and 234 are attached to the holding parts 231a and 232a, respectively, while being attached to the part 221b. In this case, lenses having the second lens power are used as the condenser lenses 208 to 210.

  The position and shape (lens power) of the condensing lenses 221, 231-234 and the shape of the condenser lenses 208-210 are such that the effective illumination areas of the first and second light valves can be efficiently illuminated. Is set in advance. These conditions can also be calculated using optical simulation software.

  As an example of the optical simulation result when the B optical path is included as the branching optical path, FIG. 14A shows the optical component arrangement conditions when the first light valve having a diagonal length of 0.7 inches is used. FIG. 14B shows the optical component arrangement conditions when a second light valve having a diagonal length of 0.55 inches is used. In both examples of FIGS. 14A and 14B, the effective diameter of the STO surface is φ40, the maximum angle of view is 6.0, and the position 2 mm from the exit surface of the polarization conversion element is the STO surface. The items in each column in FIGS. 14A and 14B are the same as those shown in FIGS. 2A and 2B, and the description thereof is omitted here.

  In the arrangement of the optical components in the case of the first light valve (0.7 inch) shown in FIG. 14A, the condenser lens 221 has a sphere R of the entrance surface of 84.26 mm and a sphere R of the exit surface of 391. It is composed of a glass material “FD60” having a thickness of 61 mm and a thickness of 6 mm. The condenser lens 231 is made of a glass material “E-F2” having a sphere R of 64.08 mm on the entrance / exit surface, a 131.45 mm sphere R on the exit surface, and a thickness of 4.1 mm. The lens having the first lens power used as the condenser lens 208 is made of a glass material “BK7” having a sphere R of an incident surface of 48.31 mm, a flat exit surface, and a thickness of 4 mm. The interval between the condenser lenses 221 and 231 is 69.9 mm in terms of linear distance. The distance between the condenser lens 231 and the condenser lens 208 is 30 mm in terms of linear distance. The distance from the exit surface of the polarization conversion element to the entrance surface of the condenser lens 221 is 2 mm (= 2 mm + 0 mm).

  On the other hand, in the arrangement of the optical components in the case of the second light valve (0.55 inch) shown in FIG. 14B, the shape, material and arrangement of the condenser lens 221 are the same as described above. The condensing lens 233 is made of a glass material “FD60” in which the sphere R on the entrance surface is 51.227 mm, the sphere R on the exit surface is 114 mm, and the thickness is 4.9 mm. The lens having the second lens power used as the condenser lens 208 is made of a glass material “BK7” having a spherical surface R of 64.59 mm, a flat exit surface, and a thickness of 4 mm. The distance between the condenser lenses 221 and 233 is 53.4 mm in terms of a linear distance. The distance between the condenser lens 233 and the condenser lens 208 is 30 mm in terms of linear distance. The distance from the exit surface of the polarization conversion element to the entrance surface of the condenser lens 221 is 17.7 mm (= 2 mm + 15.7 mm).

  The optical simulation results when the G optical path and the R optical path are included as the branch optical paths are also the same as the results shown in FIGS. 14 (a) and 14 (b). However, in the case of the R optical path, the result is an arrangement in which the portion relating to the relay lens is omitted as described above.

  In both cases of FIG. 14A and FIG. 14B, as in the first embodiment, it is possible to secure an illumination area that secures substantially the same margin as the light valve. There is no need to change the position and size of each fly-eye lens and polarization conversion element. Further, the sphere R of the condenser lens may be the same when a 0.7 inch light valve is used and when a 0.55 inch light valve is used.

  In the configuration of the present embodiment described above, any one of the condenser lens 221 and the condenser lenses 231 to 234 may be constituted by a lens having negative power.

  As described above, the example in which the arrangement and shape of the condenser lens are changed in the first embodiment, the example in which the number and arrangement of the condenser lenses are changed in the second and third embodiments, and the condenser lens in the fourth and fifth embodiments. In the examples 6 and 7, the example in which the arrangement / shape of the condenser lens is changed has been described. However, other forms are possible. For example, the same effects as those of the above-described embodiments can be obtained by changing the number and shape of the condenser lenses and changing the number, shape, and arrangement of the condenser lenses.

  The present invention is not limited to the configuration of each of the embodiments described above, and the configuration can be appropriately changed without departing from the spirit of the invention. For example, in each of the first to seventh embodiments, when a light valve having a different effective area is mounted on the optical unit 601, the image display unit 300 and the color composition imaging unit 400 may be replaced as a unit. .

  Further, the image display unit 300 and the cross dichroic prism 410 may be exchanged as a unit.

  Furthermore, the light valve provided in each of the R, G, and B optical paths, the polarizing plate provided on the light emission side of each light valve, and the color composition imaging unit 400 may be replaced as a unit.

  Furthermore, the light valve provided in each of the R, G, and B optical paths, the polarizing plate provided on the emission side of each light valve, and the cross dichroic prism 410 may be replaced as a unit.

  In addition, the configuration of the color separation illumination unit 200 is not limited to the illustrated configuration, and can be changed as appropriate. For example, the order of separation of R light, G light, and B light by the dichroic mirror may be changed. In addition, a dichroic mirror having a wedge coat with different characteristics on the left and right according to the angular distribution of incident light may be used, and the characteristics of the wedge coat may be changed according to the size of the light valve.

  Moreover, the size of the replaceable light valve may be three or more. However, the range of the size type is within a range in which the condenser lens can be arranged on the optical unit.

  Although the above description has been given of the three-plate type, the present invention can also be applied to a single-plate type. In this case, for example, an arrangement corresponding to the arrangement of optical components in the B optical path may be considered.

It is a schematic diagram which shows the 1st manufacturing form of the projection type display apparatus which is the 1st Embodiment of this invention. It is a schematic diagram which shows the 2nd manufacturing form of the projection type display apparatus which is the 1st Embodiment of this invention. It is a figure which shows an example of optical component arrangement | positioning at the time of using the light valve whose size is 0.7 inches in the 1st manufacturing form shown to Fig.1 (a). It is a figure which shows an example of optical component arrangement | positioning at the time of using the light valve whose size is 0.55 inches in the 2nd manufacturing form shown in FIG.1 (b). It is a schematic diagram which shows the 1st manufacturing form of the projection type display apparatus which is the 2nd Embodiment of this invention. It is a schematic diagram which shows the 2nd manufacturing form of the projection type display apparatus which is the 2nd Embodiment of this invention. It is a figure which shows an example of optical component arrangement | positioning at the time of using the light valve whose size is 0.7 inches in the 1st manufacturing form shown to Fig.3 (a). It is a figure which shows an example of optical component arrangement | positioning at the time of using the light valve whose size is 0.55 inches in the 2nd manufacturing form shown in FIG.3 (b). It is a schematic diagram which shows the 1st manufacturing form of the projection type display apparatus which is the 3rd Embodiment of this invention. It is a schematic diagram which shows the 2nd manufacturing form of the projection type display apparatus which is the 3rd Embodiment of this invention. It is a figure which shows an example of optical component arrangement | positioning at the time of using the light valve whose size is 0.7 inches in the 1st manufacturing form shown to Fig.5 (a). It is a figure which shows an example of optical component arrangement | positioning at the time of using the light valve whose size is 0.62 inches in the 2nd manufacturing form shown in FIG.5 (b). It is a schematic diagram which shows the 1st manufacturing form of the projection type display apparatus which is the 4th Embodiment of this invention. It is a schematic diagram which shows the 2nd manufacturing form of the projection type display apparatus which is the 4th Embodiment of this invention. It is a figure which shows an example of optical component arrangement | positioning at the time of using the light valve whose size is 0.7 inches in the 1st manufacturing form shown to Fig.7 (a). It is a figure which shows an example of optical component arrangement | positioning at the time of using the light valve whose size is 0.55 inches in the 2nd manufacturing form shown in FIG.7 (b). It is a schematic diagram which shows the 1st manufacturing form of the projection type display apparatus which is the 5th Embodiment of this invention. It is a schematic diagram which shows the 2nd manufacturing form of the projection type display apparatus which is the 5th Embodiment of this invention. It is a figure which shows an example of optical component arrangement | positioning at the time of using the light valve whose size is 0.7 inches in the 1st manufacturing form shown to Fig.9 (a). It is a figure which shows an example of optical component arrangement | positioning at the time of using the light valve whose size is 0.55 inches in the 2nd manufacturing form shown in FIG.9 (b). It is a schematic diagram which shows the 1st manufacturing form of the projection type display apparatus which is the 6th Embodiment of this invention. It is a schematic diagram which shows the 2nd manufacturing form of the projection type display apparatus which is the 6th Embodiment of this invention. It is a figure which shows an example of optical component arrangement | positioning at the time of using the light valve whose size is 0.7 inches in the 1st manufacturing form shown to Fig.11 (a). It is a figure which shows an example of optical component arrangement | positioning at the time of using the light valve whose size is 0.55 inches in the 2nd manufacturing form shown in FIG.11 (b). It is a schematic diagram which shows the 1st manufacturing form of the projection type display apparatus which is the 7th Embodiment of this invention. It is a schematic diagram which shows the 2nd manufacturing form of the projection type display apparatus which is the 7th Embodiment of this invention. It is a figure which shows an example of optical component arrangement | positioning at the time of using the light valve whose size is 0.7 inches in the 1st manufacturing form shown to Fig.13 (a). It is a figure which shows an example of optical component arrangement | positioning at the time of using the light valve whose size is 0.55 inches in the 2nd manufacturing form shown in FIG.13 (b).

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Light source part 200 Color light separation illumination part 300 Image display part 400 Color composition imaging part 101 Light source 102, 211, 212, 213 Reflection mirror 103 Cover glass 201, 202 Fly eye 203 Polarization conversion element 204, 205 Dichroic mirror 206, 207 Relay Lens 208, 209, 210 Condenser lens 221, 222, 231, 232, 241 Condensing lens 301, 302, 303, 304, 305, 306 Polarizing plate 311, 312, 321, 322, 331, 332 Light valve 401 Projection lens 410 Cross dichroic prism 501 Projection screen 601 Optical unit

Claims (41)

A projection display device comprising an optical unit including a light valve and an illumination optical system for irradiating illumination light to an effective illumination area of the light valve,
As the light valve, at least two types of light valves having different effective illumination areas can be selectively used, and the light condensing lens constituting the illumination optical system can be used according to the size of the light valve used. A projection display device whose arrangement can be changed at least. The replaceable light bulbs are first and second light bulbs of different sizes;
The illumination optical system includes a first optical component arrangement in which the number, arrangement, and shape of a condenser lens for irradiating illumination light to the first light valve are set in advance, and the second light valve. The projection display device according to claim 1, wherein the projection display device can be changed between a second optical component arrangement in which the number, arrangement, and shape of condenser lenses for irradiating illumination light are preset. The illumination optical system includes:
A polarization conversion element that converts incident light into linearly polarized light;
A dichroic mirror that reflects a predetermined wavelength region of light that has passed through the polarization conversion element and transmits the remaining wavelength region;
A first condenser lens disposed between the polarization conversion element and the dichroic mirror;
The projection display device according to claim 2, wherein a shape and an arrangement of the first condenser lens are different between the first optical component arrangement and the second optical component arrangement. The illumination optical system includes a polarization conversion element that converts incident light into linearly polarized light, and a dichroic mirror that reflects a predetermined wavelength region of light that has passed through the polarization conversion element and transmits the remaining wavelength region,
An effective illumination area of the second light valve is smaller than an effective illumination area of the first light valve;
The first optical component arrangement is a form in which a first condenser lens having a positive power is arranged between the polarization conversion element and the dichroic mirror,
The second optical component arrangement is different from the first condenser lens in that the first condenser lens is arranged at a position closer to the dichroic mirror than the arrangement position in the first optical component arrangement. The projection display device according to claim 2, wherein the second condensing lens having a positive power is disposed in each of two light paths separated by the dichroic mirror. The illumination optical system includes a polarization conversion element that converts incident light into linearly polarized light, and a dichroic mirror that reflects a predetermined wavelength region of light that has passed through the polarization conversion element and transmits the remaining wavelength region,
The effective illumination area of the second light valve is smaller than the effective illumination area of the first light valve;
The first optical component arrangement includes a first condenser lens having a positive power arranged between the polarization conversion element and the dichroic mirror, and a second condenser lens having a negative power, It is a form arranged in the optical path of two lights separated by a dichroic mirror,
The projection display according to claim 2, wherein the second optical component arrangement is a form in which the first condenser lens is arranged closer to the dichroic mirror than an arrangement position in the first optical component arrangement. apparatus. The illumination optical system includes first and second condenser lenses having different powers, and the arrangement of the first and second condenser lenses is the first optical component arrangement and the second optical component arrangement. The projection display device according to claim 2, which is different from each other. The illumination optical system includes a polarization conversion element that converts incident light into linearly polarized light, and a dichroic mirror that reflects a predetermined wavelength region of light that has passed through the polarization conversion element and transmits the remaining wavelength region, The projection display device according to claim 6, wherein at least the first condenser lens is disposed between the polarization conversion element and the dichroic mirror. The projection display device according to claim 7, wherein the second condenser lens is disposed between the polarization conversion element and the dichroic mirror. The said 2nd condensing lens is each arrange | positioned in the optical path of two light isolate | separated by the said dichroic mirror in at least one of the said 1st and 2nd optical component arrangement | positioning. Projection display device. 10. The projection display device according to claim 6, wherein one of the first and second condenser lenses has a positive power and the other has a negative power. The illumination optical system includes first to third condenser lenses having different powers, and the arrangement of the first to third condenser lenses is the first optical component arrangement and the second optical component arrangement. The projection display device according to claim 2, which is different from each other. The illumination optical system includes a polarization conversion element that converts incident light into linearly polarized light, and a dichroic mirror that reflects a predetermined wavelength region of light that has passed through the polarization conversion element and transmits the remaining wavelength region, The projection display device according to claim 11, wherein at least the first condenser lens is disposed between the polarization conversion element and the dichroic mirror. The projection display device according to claim 11, wherein the second and third condenser lenses are disposed between the polarization conversion element and the dichroic mirror. The third condensing lens is respectively disposed in an optical path of two lights separated by the dichroic mirror in at least one of the first and second optical component arrangements. Projection display device. The said 2nd and 3rd condensing lens is each arrange | positioned in the optical path of two light isolate | separated by the said dichroic mirror in at least one of the said 1st and 2nd optical component arrangement | positioning. 11. A projection display device according to item 11. The projection display device according to claim 11, wherein the first and third condenser lenses have negative power and the second condenser lens has positive power. The projection display device according to claim 11, wherein the first condenser lens has positive power and the second and third condenser lenses have negative power. The projection display device according to claim 11, wherein the first and second condenser lenses have positive power and the third condenser lens has negative power. The projection display device according to claim 11, wherein the first condenser lens has a negative power and the second and third condenser lenses have a positive power. The projection display device according to claim 11, wherein the first and second condenser lenses have negative power, and the third condenser lens has positive power. The illumination optical system includes:
A polarization conversion element that converts incident light into linearly polarized light;
A dichroic mirror that reflects a predetermined wavelength region of light that has passed through the polarization conversion element and transmits the remaining wavelength region;
A first condenser lens disposed between the polarization conversion element and the dichroic mirror;
A second condenser lens respectively disposed in the optical path of the two lights separated by the dichroic mirror,
The shape and arrangement of the first condenser lens are different between the arrangement of the first optical component and the arrangement of the second optical component, and the shape and arrangement of the second condenser lens are the first and second. The projection display device according to claim 2, which is the same in both forms of the optical component arrangement. The illumination optical system includes:
A polarization conversion element that converts incident light into linearly polarized light;
A dichroic mirror that reflects a predetermined wavelength region of light that has passed through the polarization conversion element and transmits the remaining wavelength region;
A first condenser lens disposed between the polarization conversion element and the dichroic mirror;
A second condenser lens respectively disposed in the optical path of the two lights separated by the dichroic mirror,
The shape of the first condenser lens and the arrangement of the second condenser lens are the same in both forms of the first and second optical component arrangements, and the arrangement of the first condenser lens and the The projection display device according to claim 2, wherein a shape of the second condenser lens is different between the first optical component arrangement and the second optical component arrangement. The illumination optical system includes:
A polarization conversion element that converts incident light into linearly polarized light;
A dichroic mirror that reflects a predetermined wavelength region of light that has passed through the polarization conversion element and transmits the remaining wavelength region;
A first condenser lens disposed between the polarization conversion element and the dichroic mirror;
A second condenser lens respectively disposed in the optical path of the two lights separated by the dichroic mirror,
The arrangement of the first and second condenser lenses is the same in both forms of the first and second optical component arrangements, and the shape of the first and second condenser lenses is the first The projection display device according to claim 2, wherein an optical component arrangement differs from the second optical component arrangement. The projection display device according to any one of claims 21 to 23, wherein the first and second condenser lenses have positive power. 24. The projection display device according to claim 21, wherein the first condenser lens has a positive power and the second condenser lens has a negative power. The dichroic mirror has a wedge coat having different characteristics on the left and right according to the angular distribution of incident light. The characteristics of the wedge coat are the first optical component arrangement and the second optical component arrangement. The projection display device according to any one of claims 3 to 25, wherein the projection display device can be changed by the following. The light valves are three light valves that are illuminated with illumination lights of three colors having different wavelength regions, and an image display unit including the three light valves, and 3 generated by the image display unit. 27. The projection display device according to any one of claims 3 to 26, wherein a color synthesis image forming unit that synthesizes images of two colors and projects them on a screen can be exchanged as a unit. The light valves are three light valves that are illuminated with illumination lights of three colors having different wavelength regions, and an image display unit including the three light valves, and 3 generated by the image display unit. 27. The projection display device according to any one of claims 3 to 26, wherein a cross dichroic prism that synthesizes images of two colors can be exchanged as a unit. The projection display device according to claim 27 or 28, wherein the image display unit includes three polarizing plates arranged on an emission side of the three light valves. A method for manufacturing a projection display device comprising an optical unit including a light valve and an illumination optical system for irradiating illumination light to an effective illumination area of the light valve,
The optical unit is configured so that at least two types of light valves having different effective illumination areas can be selectively used as the light valve, and the illumination optical system is configured for each light valve size. The optical unit is configured such that a plurality of optical component arrangements each having a set number, arrangement, and shape of light lenses can be formed, and the illumination optical system is arranged in accordance with the size of the light valve used. A method of manufacturing a projection display device, which is changed between the arrangement of optical components. The illumination optical system includes a polarization conversion element that converts incident light into linearly polarized light, a dichroic mirror that reflects a predetermined wavelength range of light that has passed through the polarization conversion element, and transmits the remaining wavelength range, and these polarization conversions A first condenser lens disposed between the element and the dichroic mirror;
The method for manufacturing a projection display device according to claim 30, wherein the arrangement and shape of the first condenser lens are changed according to a size of a light valve to be used. The illumination optical system includes a polarization conversion element that converts incident light into linearly polarized light, and a dichroic mirror that reflects a predetermined wavelength region of light that has passed through the polarization conversion element and transmits the remaining wavelength region,
When the first light valve is mounted on the optical unit as the light valve, a first condenser lens having a positive power is disposed between the polarization conversion element and the dichroic mirror,
When the second light valve having a smaller effective illumination area than the first light valve is mounted on the optical unit as the light valve, the first condenser lens is connected to the first light valve. Two lights separated from the dichroic mirror by a second condenser lens that is arranged closer to the dichroic mirror than the arrangement position in the bulb and having a positive power different from that of the first condenser lens The method of manufacturing a projection display device according to claim 30, wherein the projection display device is disposed in each of the optical paths. The illumination optical system includes a polarization conversion element that converts incident light into linearly polarized light, and a dichroic mirror that reflects a predetermined wavelength region of light that has passed through the polarization conversion element and transmits the remaining wavelength region,
When the first light valve is mounted on the optical unit as the light valve, a first condenser lens having a positive power is disposed between the polarization conversion element and the dichroic mirror, and a negative A second condensing lens having power is disposed in each of the optical paths of the two lights separated by the dichroic mirror;
When the second light valve having a smaller effective illumination area than the first light valve is mounted on the optical unit as the light valve, the first condenser lens is connected to the first light valve. 31. The method of manufacturing a projection display device according to claim 30, wherein the projection display device is arranged at a position closer to the dichroic mirror than an arrangement position of the bulb. The illumination optical system includes a polarization conversion element that converts incident light into linearly polarized light, a dichroic mirror that reflects a predetermined wavelength range of light that has passed through the polarization conversion element, and transmits the remaining wavelength range, and these polarization conversions A first condenser lens and a second condenser lens disposed between the element and the dichroic mirror, one having positive power and the other having negative power;
31. The method of manufacturing a projection display device according to claim 30, wherein the arrangement of the first and second condenser lenses is changed according to a size of a light valve mounted on the optical unit. The illumination optical system includes a polarization conversion element that converts incident light into linearly polarized light, a dichroic mirror that reflects a predetermined wavelength range of light that has passed through the polarization conversion element, and transmits the remaining wavelength range, and these polarization conversions Having first to third condenser lenses having different powers disposed between the element and the dichroic mirror;
The method for manufacturing a projection display device according to claim 30, wherein the arrangement of the first to third condenser lenses is changed according to the size of a light valve mounted on the optical unit. The illumination optical system includes a polarization conversion element that converts incident light into linearly polarized light, a dichroic mirror that reflects a predetermined wavelength range of light that has passed through the polarization conversion element, and transmits the remaining wavelength range, and these polarization conversions A first condenser lens disposed between an element and the dichroic mirror, and a second condenser lens respectively disposed in an optical path of two lights separated by the dichroic mirror;
31. The method of manufacturing a projection display device according to claim 30, wherein only the shape and arrangement of the first condenser lens are changed according to a size of a light valve mounted on the optical unit. The illumination optical system includes a polarization conversion element that converts incident light into linearly polarized light, a dichroic mirror that reflects a predetermined wavelength range of light that has passed through the polarization conversion element, and transmits the remaining wavelength range, and these polarization conversions A first condenser lens disposed between an element and the dichroic mirror, and a second condenser lens respectively disposed in an optical path of two lights separated by the dichroic mirror;
The projection display device according to claim 30, wherein the arrangement of the first condenser lens and the shape of the second condenser lens are changed according to a size of a light valve mounted on the optical unit. Production method. The illumination optical system includes a polarization conversion element that converts incident light into linearly polarized light, a dichroic mirror that reflects a predetermined wavelength range of light that has passed through the polarization conversion element, and transmits the remaining wavelength range, and these polarization conversions A first condenser lens disposed between an element and the dichroic mirror, and a second condenser lens respectively disposed in an optical path of two lights separated by the dichroic mirror;
31. The method of manufacturing a projection display device according to claim 30, wherein only the shapes of the first and second condenser lenses are changed according to the size of a light valve mounted on the optical unit. The method for manufacturing a projection display device according to any one of claims 36 to 38, wherein the first and second condenser lenses have positive power. 39. The method of manufacturing a projection display device according to claim 36, wherein the first condenser lens has a positive power and the second condenser lens has a negative power. As the dichroic mirror, a dichroic mirror provided with a wedge coat having different characteristics on the left and right according to the angular distribution of incident light is used, and the wedge is selected according to the size of the light valve mounted on the optical unit. The method for manufacturing a projection display device according to any one of claims 31 to 40, wherein the characteristics of the coat are changed.

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