JPH10232447A - Light valve attaching device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform registration adjustment with less picture element deviation. SOLUTION: A light valve 7R is fixed to a first metal fitting 10. The metal fitting 10 has an aperture part 10a formed on a position corresponding to the light incident part of the valve 7R, and four leg parts 11 protruding to the sides. A second metal fitting 13 has an aperture part 13a formed on a position corresponding to the part 10a, and leg parts 14, 15 and 16 fixed to a base plate part and supporting the peripheral part 21 of the part 13a so that the part 21 floats on the base plate part. The parts 14 and 15 have bent parts 14-1, 14-2, 15-1, and 15-2 whose surfaces are at a right angle with the surface of the valve 7R, and bent parts 14-1-1, 14-2-1, 15-1-1, and 15-2-1 which are adjacent to the respective bent parts 14-1, 14-2, 15-1, and 15-2 and in parallel with the surface of the light valve 6R. The parts 14-1-1, 14-2-1, 15-1-1, 15-2-1 and the four parts 11 are respectively fixed by soldering.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for mounting a light valve in a projection display device using the light valve.

[0002]

2. Description of the Related Art As a conventional example of a projection type display device using a plurality of light valves, a device described in Japanese Patent Application Laid-Open No. 63-39294 is known. FIG. 7 shows a configuration diagram of this conventional projection type display device. The projection type display device will be described with reference to FIG.

In FIG. 7, reference numeral 211 denotes a so-called Philips type dichroic prism which serves both as a color separation optical system and a color synthesizing optical system. The dichroic prism 211 is composed of a first prism 211A and a first prism 211A arranged as shown in FIG. Two prism 211B and third prism 21
1C. Surface 211e of first prism 211A
A dichroic thin film that reflects blue light and transmits light in a longer wavelength range than that is deposited. A gap is formed between the first prism 211A and the second prism 211B. Second prism 211B and third prism 21
A dichroic thin film that reflects red light and transmits green light is deposited on a surface 211f between the first and second surfaces. Therefore, when white light enters from the surface 211a, the surface 211a
e, the blue light is reflected, and this blue light is further reflected on the surface 211a.
The light is totally reflected at the inner surface and goes to the emission surface 211b. Face 21
The red light out of the light transmitted through 1e is reflected by the surface 211f, is totally internally reflected by the surface in contact with the gap, and is emitted by the emission surface 2f.
Head to 11c. Of the light transmitted through the surface 211e, green light is transmitted through the surface 211f and goes to the emission surface 211d.
In FIG. 7, reference numerals 212, 213, and 214 denote two-dimensional reflective liquid crystal elements (light valves) for displaying a blue component image, a red component image, and a green component image in order, and the emission surfaces 211b, 211c, and 211d. Are arranged in the vicinity. These light valves 212, 213, 21
Reference numeral 4 has a configuration in which reflection layers 215, 216, and 217 made of dielectrics are respectively formed on the back surface of the transmission type light valve, and is configured as a reflection type light valve. In FIG. 7, reference numeral 221 denotes a polarizing beam splitter, which is arranged on the set optical axis O of the dichroic prism 211. Reference numeral 222 denotes a collimation lens, and a white light source 223 such as a halogen lamp is arranged almost on the focal point of the collimation lens 222.
218, 219 and 220 are light valves 212 and 21
3, 214, respectively.

In the conventional projection display apparatus having the above-described configuration, the light beam emitted from the white light source 223 enters the collimation lens 222 to become a substantially parallel light beam, and is reflected by the polarization beam splitter of the polarization beam splitter 221. Light enters the dichroic prism 211. The linearly polarized light (S-polarized light) incident on the dichroic prism 211 is color-separated into each color light, and is incident on each color light valve 212, 213, 214, and is spatially modulated by the video signal of each color light, and the polarization direction. Is reflected by being converted by 90 degrees, and travels backward in the optical path, is color-combined by the dichroic prism 211, and exits from the surface 211a.
The component whose polarization direction has been changed (P-polarized component) is analyzed by the polarization beam splitter 221 and transmitted therethrough.
The light is projected on the screen 225 by the projection lens 224.

The light valves 212 and 21 for the respective color lights
3, 214 has a predetermined resolution, and has pixels determined by the resolution and the size of the light valves 212, 213, 214. A predetermined pixel is activated by the signal for each color light, and the arrangement of the liquid crystal in the pixel portion is changed to give a modulation action to the incident light so as to emit the light with a polarization different from the incident light.

The light valves 212, 213, and 214 have the same resolution, and the modulated light of each color emitted from the light valves is synthesized and projected. It is necessary to perform registration, so-called registration adjustment, every time.

Although Japanese Patent Application Laid-Open No. 63-39294 does not disclose a method for adjusting the registration,
Registration adjustment was performed using the mounting apparatus disclosed in Japanese Patent Application Publication No.
A, 211B, 211C have light valves 212, 21
It is conceivable to attach 3,214. However, the mounting device described in Japanese Utility Model Publication No. 5-20076 does not mount a liquid crystal light valve, but uses the same Philips type dichroic prism as the Philips type dichroic prism described in JP-A-63-39294. , While adjusting the registration
This is a device for mounting a solid-state imaging device such as a CD.

FIG. 8 is an exploded perspective view of the mounting device disclosed in Japanese Utility Model Publication No. 5-20076. This device is composed of three sets (one set of which is not shown) corresponding to R light (red light), G light (green light), and B light (blue light). Since each set of devices has exactly the same configuration,
A set of devices disassembled in FIG. 8 will be described by defining an X axis, a Y axis, and a Z axis orthogonal to each other as shown in FIG. This device includes a first metal fitting 124 to which a solid-state image sensor 123 composed of a CCD element is fixed with a screw 127, and a second metal fitting 125 to be fixed to a predetermined color light emitting end face of a Philips type prism 121. And The surface of the solid-state image sensor 123 is X
It is a Y plane. The first metal fitting 124 has a total of four legs 1 protruding two each in the Y direction and the −Y direction.
24A. Two legs 12 protruding in the Y direction
4A position in the X direction and two legs 1 protruding in the -Y direction
The position in the X direction of 24A is the same position. The second fitting 125 has four legs 125A protruding in the Y direction or the −Y direction at positions corresponding to the four legs 124A of the first fitting 124, respectively.
According to this apparatus, the solid-state image sensor 123 is fixed by soldering the leg 124A of the first metal fitting 124 and the corresponding leg 125A of the second metal fitting 125 while performing registration adjustment. It is fixed to the prism 121. In FIG. 8, reference numeral 126 denotes a packing member which is sandwiched between the first metal fitting 124 and the second metal fitting 125 at the time of fixing. In FIG. 8, reference numeral 128 denotes another set of devices fixed to the prism 121 as described above. Further, in FIG. 8, 122 is a support substrate, 124B is an opening formed in the first metal fitting 124,
125A indicates an opening formed in the second metal fitting 125, and A indicates solder previously attached to the legs 124A and 125A.

[0009]

However, the conventional mounting device shown in FIG. 8 has the following problems.

That is, the soldering of the leg 124A of the first metal fitting 124 and the leg 125A of the second metal fitting 125 shown in FIG. 8 is performed while performing registration adjustment. It is necessary to set the solder part to a temperature environment of several hundred degrees, and even if the registration adjustment is performed in the state where the solder is melted, the registration is shifted due to the uneven temperature distribution of both metal fittings after cooling time Problem had occurred. That is, the leg 124
When soldering A and leg 125A, legs 124A,
125A is exposed to high temperatures, so that the legs 124A,
125A, the first and second fittings 124, 1
25, the heat is transmitted to the main body portion of the first and second main bodies.
According to the thermal expansion coefficient of the metal fittings 124 and 125,
It is deformed at the time of cooling, and the metal fittings 124, 125 for R, G, B light are deformed, and the pixels of the light valves 212, 213, 214 for each color light are relatively shifted. In particular, in the conventional mounting device, since the first and second fittings 124 and 125 are both formed in a flat plate shape parallel to the surface of the light valve, the heat of the first and second fittings 124 and 125 is increased. The dimensional change according to the expansion coefficient was large in the plane direction, and the pixel shift was large.

Further, in the mounting device shown in FIG.
Since the metal fitting 125 is directly fixed to the prism 121, the fixing must be performed with an adhesive or the like, and it is difficult to surely fix the metal fitting 125 to the prism 121.

The applicant of the present invention has already filed a patent application for a projection display device having a configuration different from that of a conventional projection display device (Japanese Patent Application No. 8-213188). FIG.
FIG. 1 is a schematic perspective view showing a basic configuration of an optical configuration of the projection display device. For convenience of explanation, an X axis, a Y axis, and a Z axis that are orthogonal to each other are defined as shown in the drawing.

In this projection type display device, as shown in FIG. 1, a light source light is a color separation optical system in which a B light reflecting dichroic mirror 3B and an R light reflecting dichroic mirror 3R are combined at right angles to each other. The light is separated into R light, G light, and B light by the cross dichroic mirror 3.
These color-separated R light, G light, and B light are bent at right angles by bending mirrors 5R, 5G, and 5B into optical axes parallel to each other, and arranged in a polarization beam splitter 6 for each color.
The light is incident on R, 6G, and 6B and is polarized and separated.
Only one transmitted P-polarized light of the polarization-separated polarized light of each color light is the reflective liquid crystal light valve for each color light 7R,
Image signals (color signals) for each color light which are incident on 7G and 7B
Respectively, and the light valves 7R, 7G,
The light is reflected and emitted from 7B. The reflected outgoing light (modulated light) of each color light is again transmitted to the polarization beam splitters 6R, 6G,
6B, and enters the polarization beam splitters 6R, 6R.
The light is analyzed by the G and 6B polarization splitters, and only the signal component (analyzed light) is reflected and extracted. The analysis light of each color light includes three triangular prisms 8-1, 8-2, 8-3 and a B light reflecting dichroic film 8B interposed therebetween.
Each color is input to a color synthesizing dichroic prism 8 as a color synthesizing optical system composed of a G light reflecting dichroic film 8G, and color synthesis is performed, and the color synthesis light (image forming light) is projected light (not shown). It is projected on the screen by the projection lens as a system. Note that the optical axis of each color light emitted from the color separation dichroic mirror 3 and the incident optical axis of each color light of the color synthesis dichroic prism 8 are R
Light and G light are parallel for each color, but B
Since the light is not parallel, one folding mirror 4B is set so that the B light also has an optical axis parallel to each other.
The optical path length of the B light is different from the optical path lengths of the R light and the G light.

In the projection type display device shown in FIG. 1, the cross dichroic mirror 3 and the bending mirrors 2, 5R, 5
G, 5B, 4B constitute the first floor, and the polarizing beam splitters 6R, 6G, 6B, the color synthesizing dichroic prism 8, and the projection lens (not shown) constitute the second floor. Device.

In the case of such a projection type display device, it is necessary to dispose the polarizing beam splitters 6R, 6G, 6B below the light valves 7R, 7G, 7B, respectively, but it is necessary to mount the light valves 7R, 7G, 7B. If the mounting device shown in FIG. 8 is adopted, the second metal fitting 125 is directly fixed on the polarizing beam splitters 6R, 6G, 6B. Therefore, in this case, it is also difficult to surely fix it.

The present invention has been made in view of such circumstances, and provides a light valve mounting apparatus capable of performing registration adjustment with less pixel shift and capable of securely mounting a light valve. The purpose is to:

It is another object of the present invention to provide a light valve mounting device suitable for disposing a polarizing beam splitter under a light valve.

[0018]

According to a first aspect of the present invention, there is provided a light valve mounting apparatus in which a light valve is fixed and an opening is provided at a position corresponding to a light incident portion of the light valve. A first fitting having:
An opening formed at a position corresponding to the opening of the first metal fitting, and a plurality of legs fixed to the substrate and supporting a peripheral portion of the opening in a state of being floated with respect to the substrate. A second fitting having at least two of the plurality of legs of the second fitting, wherein at least two of the legs have a plane substantially perpendicular to a plane of the light valve. A first portion and a second portion contiguous with each of the at least one first portion, the second portion having a surface substantially parallel to a surface of the light valve. Then, the second portion of the second metal fitting and a predetermined portion of the first metal fitting are fixed by soldering.

According to the first aspect, the second portion of the second metal fitting and the first portion are adjusted while performing registration adjustment.
Are fixed by soldering. This soldering heats the second part of the second metal fitting, and this heat is transmitted to the first part of the second metal fitting. However, since the area of the second part can be reduced as much as possible, the second metal fitting is heated. Since the dimensional change of the portion in the direction of the light valve surface can be extremely small, and the surface of the first portion of the second metal fitting is substantially perpendicular to the surface of the light valve,
Although the dimensions of the bracket change in a direction perpendicular to the surface of the light valve, the dimensions hardly change in the direction of the light valve surface. For this reason, the position of the second part of the second metal part, which is the part to be soldered to the predetermined part of the first metal part, is shifted in a direction perpendicular to the surface of the light valve due to the heat of the soldering. There is almost no deviation in the direction of the face of the valve. Therefore, according to the first aspect, it is possible to perform registration adjustment with less pixel shift.
A shift in a direction perpendicular to the surface of the light valve corresponds to a shift in the optical axis direction, and can be corrected by adjusting the focus of the lens system, so that no problem occurs.

Further, according to the first aspect, the second metal fitting has a plurality of legs for supporting a peripheral portion of the opening portion in a state of being floated with respect to the substrate portion. The part is fixed to the substrate part. For this reason, compared with a case where the second metal fitting is directly fixed to the polarizing beam splitter or the like, the second metal fitting can be securely fixed, and thus the light valve can be securely mounted.

The light valve mounting apparatus according to a second aspect of the present invention is the light valve mounting apparatus according to the first aspect, wherein the plurality of legs of the second fitting are provided on at least two side surfaces of a polarizing beam splitter. Each of the second metal fittings is arranged so as to cover at least a part thereof, and the opening of the second metal fitting is arranged at a position where light emitted from the polarizing beam splitter and incident on the light valve passes therethrough.

By arranging the polarization beam splitter as in the second embodiment, the polarization beam splitter can be arranged below the light valve, which is suitable for the above-mentioned projection type display device as shown in FIG. However, the light valve mounting apparatus according to the first aspect is not limited to the use of disposing the polarizing beam splitter under the light valve.

The light valve mounting device according to a third aspect of the present invention is the light valve mounting device according to the second aspect, wherein a side surface of the polarizing beam splitter is held by the plurality of legs of the second metal fitting. It was done.

It is preferable to use the plurality of legs as holding members for holding the polarizing beam splitter as in the third case, since a special member for holding the side surface of the polarizing beam splitter is not required. However, in the second aspect, the legs need not hold the side surface of the polarization beam splitter, and a member for holding the side surface of the polarization beam splitter may be separately provided.

The light valve mounting apparatus according to a fourth aspect of the present invention is the light valve mounting apparatus according to the second or third aspect, wherein the plurality of legs of the second metal fitting are the same as those of the polarizing beam splitter. It is arranged so as to cover at least a part of each of only one side surface.

According to the fourth aspect, the legs of the second metal fitting are disposed on only the two side surfaces of the polarizing beam splitter, and are not disposed on the other side surface. Therefore, it is not necessary to dispose the second leg at a position where the light emitted from the polarizing beam splitter and discarded passes.
In the case where the legs of the second metal fitting are disposed at positions where light emitted from the polarizing beam splitter and discarded passes, the legs may be deformed by receiving the discarded light and raising the temperature. Therefore, it is necessary to consider the deformation.
In this regard, according to the fourth aspect, such consideration is not necessary.

The light valve mounting apparatus according to a fifth aspect of the present invention is the light valve mounting apparatus according to any one of the first to fourth aspects, wherein the second fitting is configured to bend a plate member having a predetermined shape. It is configured.

When the second metal fitting is formed by bending a plate-like member having a predetermined shape as in the fifth aspect, the manufacture thereof becomes easy and the cost can be reduced.

[0029]

BEST MODE FOR CARRYING OUT THE INVENTION

(Example of Projection Display Apparatus) First, prior to description of a light valve installation apparatus according to an embodiment of the present invention, an example of a projection display apparatus that can adopt the light valve installation apparatus will be described with reference to FIG. explain.

FIG. 2 is a schematic perspective view showing an optical configuration of the projection type display device according to this embodiment. The projection type display device according to the present embodiment has an integrator 1, an illumination relay optical system, and the like arranged in the above-described basic configuration shown in FIG. That is, FIG. 1 is also a schematic perspective view showing a basic configuration of an optical configuration of the projection display device according to the present embodiment. Therefore, in FIG. 2, the same or corresponding elements as those shown in FIG. 1 are denoted by the same reference numerals. Note that, for simplicity of explanation, X, Y,
Define the Z axis.

FIG. 2 shows a light source 99, an integrator 1, an illumination relay optical system, and a projection lens 106 as a projection optical system, in addition to the basic configuration shown in FIG. First, the projection lens 106 will be described.
The color synthesized light (image forming light) emitted from the dichroic prism 8 as the color synthesizing optical system is projected onto a projection lens 106.
And is projected on a screen (not shown) by the projection lens 106. The projection lens 106 has an aperture stop (not shown), and has a structure having a rear lens group on the screen side with respect to the aperture stop and a front lens group on the dichroic prism 8 side with respect to the aperture stop. The projection lens 106 in this example is an optical system that is telecentric on the front side. That is, a principal ray (a ray passing through the center of the aperture stop (including an off-axis ray)) determined by the aperture stop of the projection lens 106 is located on the front side of the projection lens 106 (the opposite side to the screen).
It is parallel to the optical axis.

The light source 99 comprises a lamp (not shown) and an elliptical mirror which is a concave mirror. The lamp is arranged at a position of a first focal point of the elliptical mirror. The light source light emitted from the lamp is focused on the second focal point of the elliptical mirror. In this example, the integrator 1 is made of a rectangular parallelepiped transparent optical glass, and is arranged such that the incident end face (the end face near the light source 99) of the integrator 1 is located at the second focal point. Therefore, the light source light is
The light is condensed on the end face of the integrator 1 and enters the integrator 1. The light source light that has entered the integrator 1 is reflected from the inner surface of the integrator 1 a plurality of times, and then emitted from the end surface of the integrator 1 opposite to the incident end surface. A surface light source having a uniform light intensity distribution is formed on the exit end face of the integrator 1. In other words, the output end face is illuminated in a superimposed manner by light from virtual images of a plurality of light sources formed at the position of the incident end face by internal reflection of the integrator 1.

As shown in FIG. 2, the light emitted from the exit end face of the integrator 1 travels in the −Y direction, the direction of the optical axis is changed to the −X direction by the bending mirror 2, and the illumination relay optical system is changed. The light enters the cross dichroic mirror 3, which is the color separation optical system, via the front group illumination lens 101 having the focal length f1. The light incident on the cross dichroic mirror 3 is transmitted by the cross dichroic mirror 3 as it is, and passes through the cross dichroic mirror 3 as it is and travels in the −X direction, and is reflected by the R light reflecting dichroic mirror 3R and travels in the Y direction. The light is separated into R light and B light reflected by the B light reflecting dichroic mirror 3B and traveling in the −Y direction.

Of the color lights separated by the cross dichroic mirror 3, the R light and the G light are reflected by the bending mirrors 5R and 5G, respectively, change their optical axis directions to the Z direction, and travel in the Z direction. And a rear-group illumination lens 1 for R light having a focal length f2 which constitutes an illumination relay optical system.
Rear group illumination lens 10 for G light of 02R and focal length f2
After passing through 2G, the polarization beam splitters 6R, 6G
Respectively.

The distance between the exit end face of the integrator 1 and the front group illumination lens 101 is defined as the focal length f1 of the lens 101, and the principal ray determined by the aperture stop of the projection lens 106 has an optical axis therebetween. Is parallel to. That is, the front group illumination lens 101 forms a telecentric optical system on the front side (integrator 1 side). Further, the distance between the front group illumination lens 101 and the rear group illumination lenses 102R and 102G is f1 + f, respectively.
It is 2. That is, the rear focal position of the front group illumination lens 101 matches the front focal position of the rear group illumination lenses 102R and 102G. Therefore, the principal ray is divided into the front group illumination lens 101 and the rear group illumination lens 102R,
102G intersects at the pupil position, and is parallel to the optical axis on the rear side of the rear group illumination lenses 102R and 102G. That is, the rear group illumination lenses 102R and 102G
A telecentric optical system is configured on the rear side. After all, the relay optical system for R light composed of the front group illumination lens 101 and the rear group illumination lens 102R and the relay optical system for G light composed of the front group illumination lens 101 and the rear group illumination lens 102G are: , Each constitute a telecentric optical system on the front side and the rear side.

R light incident on the polarization beam splitters 6R and 6G via the rear group illumination lenses 102R and 102G,
Of the G light, the P-polarized light that has passed through the polarization beam splitters 6R and 6G respectively reaches the light valves 7R and 7G. However, the distance between the rear group illumination lenses 102R and 102G and the light valves 7R and 7G is different from each other. Lens 102
The focal length f is set to R, 102G.

The relay optical system for R light composed of the front group illumination lens 101 and the rear group illumination lens 102R described above, and the front group illumination lens 101 and the rear group illumination lens 102G.
The polarization beam splitters 6R and 6G and the light valves 7R and 7G are arranged at positions where the chief rays have telecentricity. Further, the R and G relay optical systems form images of the output end face of the integrator 1 (surface light source formed by the integrator 1) with the R and G lights on the liquid crystal light valves 7R and 7G, respectively. Imaged. In other words, the R and G relay optical systems achieve critical illumination of the light valves 7R and 7G with the R light and the G light, respectively. In this example, the image of the exit end face of the integrator 1 is represented by the focal length f1 of the front group illumination lens 101 and the focal length f of the rear group illumination lenses 102R and 102G constituting the above-described relay optical system.
2 and are formed on the light valves 7R and 7G respectively. For this reason, it is preferable that the shape of the end surface of the integrator 1 is formed in proportion to the shape of the image display surface of the light valves 7R and 7G in order to achieve efficient illumination.

The B light that has been color-separated by the cross dichroic mirror 3 as a color separation optical system and emitted in the −Y direction is a rear group illumination lens 10 for B light having a focal length f3.
3B, the direction of the optical axis is changed to XY by the bending mirror 4B.
The light is changed to a direction parallel to the plane, passes through the front group illumination lens 104B of the focal length f4 constituting the second relay optical system for the B light, and the optical axis is changed to the Z direction by the bending mirror 5B. Distance f5 constituting the second relay optical system for
Then, the light enters the polarization beam splitter 6B via the rear group illumination lens 105B. Then, of the B light incident on the polarization beam splitter 6B, only the P-polarized light transmitted through the polarization separation unit of the polarization beam splitter 6B is the light valve 7B.
Incident on. The rear group illumination lens 103B constitutes a first relay optical system for B light together with the front group illumination lens 101 which also serves as a part of a relay optical system for R light and a part of a relay optical system for G light. doing. The distance between the front group illumination lens 101 and the rear group illumination lens 103B is f1 + f3. That is, the rear focal position of the front group illumination lens 101 matches the front focal position of the rear group illumination lens 103B. Therefore, B at the exit end face of the integrator 1
A primary image due to light is formed at a position determined by the focal lengths f1 and f3 and at a distance f3 from the rear-group illumination lens 103B on the emission side of the lens 103B. B
Front group illumination lens 1 constituting a second relay optical system for light
04B and the distance between the rear group illumination lens 105B are f4 +
f5. That is, the front group illumination lens 104B
And the front focal position of the rear group illumination lens 105B matches. The distance between the rear group illumination lens 105B and the light valve 7B is f5.
Therefore, the image (secondary image) of the primary image by the B light on the exit end face of the integrator 1 is formed on the light valve 7B by the illumination lenses 104B and 105B constituting the second illumination relay lens for the B light. Will be imaged. That is, the light valve 7B is critically illuminated by the B light. Further, the first and second light beams for the B light described above are used.
With the relay optical system described above, the principal ray is parallel to the optical axis between the illumination lens 103B and the illumination lens 104B and between the illumination lens 105B and the light valve 7B. Therefore, the polarizing beam splitter 6B and the light valve 7B are arranged at positions where the principal ray has telecentricity by the first and second relay optical systems for the B light described above.

In this embodiment, the light valves 7R, 7G, 7B
An electric writing type reflection type light valve is used as the light source. Basically, the electric write type reflection type light valve converts the polarization direction of the reflected and emitted light at a location that is electrically selected based on each color signal into a polarization direction different from the incident light, and reflects and reflects the polarization at the unselected location. It has the function of keeping the polarization direction of the emitted light the same as that of the incident light. The modulated light modulated by the respective color signals emitted from the light valves 7R, 7G, and 7B contains a mixture of S-polarized light at an electrically selected portion and P-polarized light at a non-selected portion. Only the S-polarized light of the modulated light of each color is reflected by the polarization splitters of the polarization beam splitters 6R, 6G, and 6B, respectively, and travels toward the dichroic prism 8 as a color combining optical system (that is, is analyzed). ), The P-polarized light of the modulated light of each color is polarized beam splitter 6R, 6G,
6B and is discarded in the −Z direction. That is, the modulated light of each color is analyzed by the polarization splitting units of the polarization beam splitters 6R, 6G, and 6B. R light detection light is in the -Y direction, G light detection light is in the X direction, and B light detection light is XY.
The light is reflected by the polarization beam splitters of the polarization beam splitters 6R, 6G, and 6B in directions parallel to the plane and different from the X and Y directions, and is incident on a dichroic prism 8 constituting a color combining optical system.

Here, the dichroic prism 8 will be described with reference to FIG. FIG. 3 shows the element 6 in FIG.
It is the XY plan view which looked at R, 6G, 6B, 7R, 7G, 7B, 8 in the -Z direction. This dichroic prism 8
Are three differently shaped triangular prism members 8-
1, 8-2, 8-3. The member 8-1 is a triangular prism whose XY cross-sectional shape is a right-angled isosceles triangular shape, and the member 8-2 has an XY cross-sectional shape of an acute triangular shape (inner angles are 45 degrees, α, α, as shown in FIG. 3). The member 8-3 is a triangular prism having an obtuse triangular XY cross-sectional shape (the inner angle on the inner angle α side of the member 8-2 among the two acute angles is γ). In this example, the angle α and the angle γ
, Β, and β under the condition that the sum of
γ can be arbitrarily determined. In the present embodiment, the dichroic prism 8 includes the members 8-1, 8-2, 8-3.
Are bonded by sandwiching the dichroic films 8G and 8B therebetween. That is,
In this example, a slope having both two 45-degree apex angles of the member 8-1 in which the G light reflecting dichroic film 8G is formed in advance, and a slope having both the apex angle β and the apex angle of 45 degrees of the member 8-2 And are bonded with an adhesive. The slope having both the apex angle α and the apex angle β of the member 8-2 on which the B light reflecting dichroic film 8B is formed in advance, and the slope having both the apex angle γ and the obtuse angle of the member 8-3 are different. , Glued together. With the above configuration, each of the members 8-1, 8-2,
After bonding 8-3, dichroic prism 8
The surface 8-1-b of the member 8-1 and the surface 8-2-a of the member 8-2 are parallel to each other, and the surface 8-1-1 of the member 8-1 is formed.
1-a and the surface 8-3-b of the member 8-3 are parallel to each other, and the surfaces 8-1-b, 8-2-a and the surfaces 8-1-a,
It becomes a right angle with 8-3-b.

The R light detection light emitted from the polarizing beam splitter 6R in the -Y direction is perpendicularly incident on the surface 8-1-a of the member 8-1 constituting the dichroic prism 8,
The light passes through the dichroic films 8G and 8B and is emitted from the dichroic prism 8 perpendicularly to the surface 8-3-b of the member 8-3 (that is, in the Y direction).

The G photometric light emitted from the polarizing beam splitter 6G in the X direction is perpendicularly incident on the surface 8-2-a of the member 8-2 constituting the dichroic prism 8, and
The light is reflected by the light reflecting dichroic film 8G, its optical axis is changed to the −Y direction, and the light is transmitted through the dichroic film 8B and perpendicularly from the surface 8-3-b of the member 8-3 to the surface 8-3-b. The dichroic prism 8 (ie, in the Y direction)
Is emitted from.

The B light detection light emitted from the polarizing beam splitter 6B is perpendicularly incident on the surface 8-3-a of the member 8-3 constituting the dichroic prism 8, and is incident on the surface 8-3.
-B surface undergoes total internal reflection, and then is reflected by the B light reflecting dichroic film 8b, and is perpendicular to the surface 8-3-b of the member 8-3 (that is, in the Y direction). -B.

The description of the dichroic prism 8 as the color synthesizing optical system has been described above. The angles α, β, γ and the shape of the member 8-3 are further adjusted so that the B light is applied to the entire inner surface so as to satisfy the aforementioned conditions. In order to satisfy the condition of reflection, the prism member 8-1 is further arranged so that the emission optical axes of the R light, G light and B light emitted from the dichroic prism 8 coincide with each other and are perpendicular to the surface 8-3-b. , 8-2, 8-3. The light valves 7R, 7
The light path length of each color light is set to be the same from G and 7B to the dichroic prism 8 through the polarizing beam splitters 6R, 6G and 6B. This is because each color light valve 7R, 7G, 7B and the projected image on the screen have a conjugate relationship with respect to the projection lens 106.

As described above, each color light valve 7R,
The polarization beam splitter 6 is modulated by 7G and 7B.
The detection light of each color light detected by R, 6G, and 6B is color-combined by the dichroic prism 8, and the combined light (image forming light) is emitted from the dichroic prism 8 in the -Y direction. become. Then, the combined light emitted from the dichroic prism 8 enters the projection lens 106 and is projected on a screen (not shown) as a full-color projection image.

As described above, the main lens has a telecentric characteristic on the front side of the projection lens 106, and further, the rear group illumination lens 102R of the relay optical system for each color light.
Since the chief ray has telecentric characteristics on the rear side of 102G and 105B, the polarization beam splitters 6R and 6R from the respective color light valves 7R, 7G and 7B.
From the G, 6B and the dichroic prism 8 to the projection lens 106, it is ensured that the principal ray has telecentric characteristics.

(First Embodiment) Next, a first embodiment of the present invention will be described.
The light valve mounting device according to the embodiment will be described with reference to FIG. FIG. 4 is an exploded perspective view showing the light valve mounting device according to the present embodiment together with the polarization beam splitter 6R. X, Y, in FIG.
The Z axis corresponds to the X, Y, and Z axes in FIG.

The light valve mounting apparatus according to the present embodiment is different from the projection type display apparatus shown in FIG.
It is configured to be used to mount the light valves 7R, 7G, 7B at predetermined positions above the polarization beam splitters 6R, 6G, 6B for each color (the same applies to the second and third embodiments described later). .). In the present embodiment, since the light valves 7R, 7G, and 7B for the respective colors have the same configuration, only the light valve mounting device for the R light light valve 7R and the polarization beam splitter 6R will be described.

The light valve mounting device according to the present embodiment includes a first fitting 10 and a second fitting 13.

In this embodiment, the light valve 7R is
As described above with reference to FIG. 2, the electric write-type reflective light valve is a liquid crystal panel unit 7R-1 (corresponding to a light incident unit) and a holding member 7R- holding the liquid crystal panel unit 7R-1. And 2. As already described with reference to FIG. 2, incident light is incident on the light valve 7R from the polarization beam splitter 6R in the Z direction, and the light is reflected by the reflection layer of the light valve 7R to become modulated light and becomes -Z. Emitted in the direction. At four corners of the holding member 7R-2, holes 20 for fixing the holding member to the first metal fitting 10 are provided.

The first metal fitting 10 has a substantially central portion (that is,
Opening 10a at a position corresponding to the light incident portion of the light valve 7R), and four legs 11 are formed so as to project two by two in the X direction and the -X direction, respectively.
Mounting hole 20 for holding member 7R-2 of light valve 7R
Has a female screw portion 12 at a position corresponding to. The holding member 7R-2 of the light valve 7R and the first metal fitting 10 are fixed by screwing the screw 19 through the hole 20 and screwing it into the female screw portion 12. The first metal fitting 10 is made by pressing a rolled steel plate (SPC material),
Solder plating is applied to the entire surface after press molding.

In the projection type display device shown in FIG. 2, the light valve 7R has a polarization beam splitter 6R below it. In accordance with this, in the present embodiment, the second metal fitting 13 has the shape and structure shown in FIG. That is, in the present embodiment, the second fitting 13
Is substantially at the center (that is, the opening 10 of the first metal fitting 10).
(a position corresponding to a), and an opening 13a which is fixed to a substrate portion (not shown in the drawing, but arranged in parallel with the XY plane in FIG. 4).
Peripheral portion 21 (disposed in parallel with the XY plane)
Has a first leg 14, a second leg 15, and a third leg 16 for supporting the substrate in a state of being floated in the Z direction with respect to the substrate. In the present embodiment, the second metal fitting 13 is formed by bending a plate-shaped member having a predetermined shape.
The second and third legs 14, 15, 16 are located on the peripheral
1 to bend the plate-like member in the −Z direction. The first leg 14 and the second leg 15 have the same structure, but the third leg 16 has a different structure.

That is, the first leg portion 14 is
1, a bent portion 14-3 (the surface thereof is parallel to the YZ plane) bent in the −Z direction from the X direction side, and the X direction on both sides of the bent portion 14-3 on the −Y direction side and the Y direction side. Bent parts 14-1, 14 bent to
-2 (the surfaces thereof are parallel to the XZ plane) and Y at the ends of the bent portions 14-1 and 14-2 in the Z direction.
14-1 bent in the-direction and the -Y direction
-1, 14-2-1 (their planes are parallel to the XY plane)
And a bent portion 14-4 (the surface thereof is parallel to the XY plane), which is bent in the X direction on the -Z direction side of the bent portion 14-3, for attachment to the substrate portion. A hole 14-4-1 for screwing to the substrate is formed in the bent portion 14-4.

Similarly, the second leg 15 is connected to the peripheral portion 21.
Bent portion 15-3 (the surface thereof is parallel to the YZ plane) bent from the −X direction side to the −Z direction, and bent portions bent in the −X direction on both sides of the bent portion 15-3 in the Y direction. Parts 15-1 and 15-2 (their surfaces are parallel to the XZ plane) and the bent parts 15-1 and 15-2.
-1-2 bent portions 15-1-1 and 15-2 bent in the Y direction and the -Y direction, respectively, at the ends in the Z direction.
-1 (these planes are parallel to the XY plane) and the bent portion 1
5-3 was bent in the X direction on the -Z direction side,
And a bent portion 15-4 (the surface thereof is parallel to the XY plane) for attachment to the substrate portion. In the bent portion 15-4, a hole 15 for screwing to the substrate portion is provided.
-4-1 is formed.

The bent portions 14-1-1, 14-2-1,
15-1-1 and 15-2-1 are arranged at positions corresponding to the legs 11 of the first metal fitting 10 at the same height (the same position in the Z direction), and their heights (Z direction). Position of)
Is higher than the height of the peripheral portion 21. However,
For example, if the leg 11 of the first metal fitting 13 is once bent in the −Z direction and then in the X direction or the −X direction, the bent portions 14-1-1, 14-2-1, and 15-1-1 are obtained. , 1
The height of 5-2-1 may be lower than the peripheral portion. In the present embodiment, the bent portion 14-1-
Each of 1, 14-2-1, 15-1-1, and 15-2-1 is bent so as to face inward, but is not limited to that direction. The bent portion 14-1
It is preferable that the areas of -1, 14-2-1, 15-1-1, and 15-2-1 are as small as possible.

In the present embodiment, the bent portion 14
-1, 14-2, 15-1, 15-2 correspond to a first portion whose surface is substantially perpendicular to the surface of the light valve 7R, and the bent portions 14-1-1, 14-. 2-1-15
-1-1 and 15-2-1 correspond to a second portion which is continuous with each of the first portions and whose surface is substantially parallel to the surface of the light valve 7R.

On the other hand, the third leg 16 has a bent portion 16-1 bent in the -Z direction from a substantially central portion of the peripheral portion 21 on the Y direction side, and a negative portion of the bent portion 16-1.
A bent portion 16-2 (the surface is XY) which is bent in the Y direction on the Z direction side and attached to the substrate portion.
(Parallel to the plane). The bent portion 16-2 has a hole 16-2-1 for screwing to the substrate.

The second metal fitting 13 is also used as the first metal fitting 10.
Similarly to the above, it is manufactured by punching a general rolled steel sheet into a predetermined shape by a press, forming the sheet into a predetermined shape by sheet metal working, and then performing solder plating on the entire surface.

The first, second and third legs 14, 15, 16 of the second metal member 13 are attached to the substrate as shown in FIG. 4, but the polarizing beam splitter 6R is connected to the third. It is attached so as to be wrapped by the three legs 14, 15, 16.

In the present embodiment, the polarization beam splitter 6R includes four L-shaped holding members 18-1, 18-2, 18-3, and 18-4 attached to the substrate.
(The holding member 18-4 is not shown in the drawing, but is fixed to the polarizing beam splitter 6R at a position facing the mounting member 18-1.) That is, each of the holding members 18-1, 18-2, 18-
3, 18-4 are screw holes 18-1-1, 18-2-1, 18-3-1, and 18 in the substrate portion and the surface, respectively.
-4-1 (the hole 18-4-1 is not shown),
The holes 18-1-1 and 18-2- in the substrate portion are provided.
1, 18-3-1 and 18-4-1 are formed with female screw portions, and screws (not shown) are inserted into the holes 18-
1-1, 18-2-1, 18-3-1, and 18-4-1 are inserted, screwed to the female screw portion, and fixed to the substrate portion. The holding members 18-1, 18-2, 18-3, and 18-4 that are in contact with the side surfaces of the polarizing beam splitter 6R are fixed with an adhesive, and the polarizing beam splitter 6R is held at a predetermined position on the substrate. Fixed. Although not shown in the drawings, the substrate portion is formed with an opening through which light incident on the polarizing beam splitter 6R from below passes.

The second metal fitting 13 is connected to the legs 14, 14 from above the polarizing beam splitter 6R fixed as described above.
15 and 16 so as to cover the legs 14, 1
Folding portions 14-4, 15 which are 5, 16 substrate contact portions
Holes 14-4-1, 15-4-1, 16 of -4, 16-2
-2-1 through the holes 14-4-1 and 15-4.
By fixing a screw (not shown) to a female screw portion formed in the substrate portion corresponding to -1, 16-2-1, it is fixed to the substrate portion. The leg 14 is disposed so as to cover a part of the side surface on the X direction side of the polarization beam splitter 6R, and the leg portion 15 is disposed so as to cover a part of the side surface on the −X direction side of the polarization beam splitter 6R. The section 16 is disposed so as to cover a part of the side surface on the Y direction side of the polarization beam splitter. The opening 13a of the second metal fitting 13 is arranged at a position where light emitted from the polarizing beam splitter 6R in the Z direction and incident on the light valve 7R passes.

The bent portions at the tips of the four legs 11 of the first metal fitting 10 to which the holding member 7R-2 of the light valve 7R is fixed and the first and second legs 14 and 15 of the second metal fitting 13. 14-1-1, 14-2-1, 15-1-1, 15-
2-1 is soldered while performing registration adjustment (pixel alignment) of the light valve 7R, whereby the light valve 7R is mounted.

In the present embodiment, as described above, the second metal fittings 13 are soldered at four positions 14-1-1, 14-2-1, and 15-1-1 at the tips of the legs 14, 15. 1,15-
Because of the structure performed in 2-1 respectively,
The temperature rise at the time of soldering is caused by the four tip portions 1
4-1-1, 14-2-1, 15-1-1, 15-2-
1, the shape does not change in the direction parallel to the XY plane, and the shape changes only in the tip direction of the legs 14, 15, ie, in the Z direction. In the conventional method described with reference to FIG. 8, since the direction changes in a direction parallel to the XY plane, even if the registration adjustment is performed, as a result of the cooling after soldering, the three-color pixel shift may occur. Although this occurs, in the present embodiment, the shift of the light valve 7R can be substantially limited to only the Z direction, so that the pixel shift is reduced. The deviation in the Z direction can be corrected by adjusting the focus of the projection lens system.

Further, according to the present embodiment, the second fitting 13 has the legs 14, 15, 16 for supporting the peripheral portion 21 of the opening 13a in a state of being floated with respect to the substrate.
And the legs 14, 15, 16 are fixed to the substrate. For this reason, compared with the case where the second fitting 13 is directly fixed to the polarization beam splitter 6R, the second fitting 1
3 can be securely fixed, and the light valve 7R can be securely mounted.

It is to be noted that R incident on the polarization beam splitter 6R in the Z direction from below the polarization beam splitter 6R.
The light is polarized and separated by the polarization splitter of the polarization beam splitter 6R, and only the transmitted P-polarized light is transmitted through the light valve 7.
The S-polarized light that is incident on R in the Z direction, is reflected by the polarization splitting unit, and is discarded in the Y direction.
Will be irradiated. Therefore, the third leg 16
Absorbs a part of the S-polarized light, and the temperature thereof rises. Therefore, it is necessary to consider the deformation of the third leg 16 due to the absorption.

(Second Embodiment) Next, a second embodiment of the present invention will be described.
The light valve mounting device according to the embodiment will be described with reference to FIG. FIG. 5 is a perspective view showing the second fitting 13 of the light valve mounting device according to the present embodiment. 5, elements that are the same as or correspond to elements in FIG. 4 are given the same reference numerals, and descriptions thereof are omitted. Note that the X, Y, and Z axes in FIG. 5 correspond to the X, Y, and Z axes in FIGS. 2 and 4.

The light valve mounting apparatus according to the present embodiment is different from the light valve mounting apparatus according to the first embodiment shown in FIG. 4 only in the structure of a part of the second fitting 13.

The second fitting 13 shown in FIG. 5 of the light valve attaching device according to the present embodiment is different from the second fitting 13 of the light valve attaching device shown in FIG. 4 only in the following points. .

That is, in the second fitting 13 shown in FIG. 5, the third leg 16 in FIG. 4 is removed, and
Bent portions 14-4 of the first and second legs 14, 15;
15-4 has been removed, and instead the first leg 14
Folded portions 14-1-2 and 14-2-2 bent in the -Y direction on the -Z direction side of the bent portions 14-1 and 14-2, respectively, for attachment to the substrate portion.
(The surfaces thereof are parallel to the XY plane), and the second leg 15 is bent in the −Y direction on the −Z direction side of the bent portions 15-1 and 15-2, respectively. 15-1 for attachment to
−2, 15-2-2 (their planes are parallel to the XY plane). In the present embodiment, the bent portion 14
-1-2, 14-2-2, 15-1-2, 15-2-2
Are bent in the −Y direction, but their bending directions are not limited to this. Folded parts 14-1-2, 14-2-2, 15-1-2, 15
-2-2 are holes 14-1-2-1, 14-2-2-1, and 15-1-1 for screwing to the substrate portion, respectively.
2-1 and 15-2-2-1 are formed, and screws (not shown) are inserted through these holes, and screw holes are formed in the female screw portions formed in the substrate portion corresponding to these holes. The legs 14 and 15 are fixed to the substrate by wearing.

In the present embodiment, the bent portions 14-1-2 and 14-2-2 provided at the lower ends of the bent portions 14-1, 14-2, 15-1 and 15-2 are provided.
Since 2, 15-1-2 and 15-2-2 are contact fixing portions for the substrate portion, the same effect as that obtained by fixing with four legs can be obtained, and the third leg portion 16 has been removed. Nevertheless, it can be firmly fixed.

In this embodiment, since the third leg 16 is removed, the leg of the second fitting 13 is
4, 15 and therefore, it is arranged so as to cover only a part of only two opposing side surfaces of the polarizing beam splitter 6R.

In the first embodiment shown in FIG. 4, as described above, the third leg is disposed in the discarding direction (Y direction) of the S-polarized light reflected and discarded by the polarization beam splitter of the polarization beam splitter 6R. Due to the presence of the portion 16, it was necessary to consider the deformation of the third leg portion 16 due to the thermal expansion due to the S-polarized light. On the other hand, in the present embodiment, since there is no leg in the discard direction of the S-polarized light, it is not necessary to consider such thermal deformation.

The present embodiment is the same as the above-described first embodiment except for the points described above. According to the present embodiment, as in the first embodiment, pixel shift is reduced and The light valve 7R can be securely mounted.

(Third Embodiment) Next, a third embodiment of the present invention will be described.
The light valve mounting device according to the embodiment will be described with reference to FIG. FIG. 6 is a side view showing the second fitting 13 of the light valve mounting device according to the present embodiment together with the polarization beam splitter 6R.
Corresponds to the YZ plane viewed in the −X direction. FIG.
The X, Y, and Z axes in FIG. 2 correspond to the X, Y, and Z axes in FIGS. For easy understanding, the polarization beam splitter 6R is hatched in FIG. 6, elements that are the same as or correspond to elements in FIG. 5 are given the same reference numerals, and descriptions thereof will be omitted.

In the first and second embodiments described above, the polarizing beam splitter 6R is provided at a predetermined position on the substrate portion with the fixing members 18-1, 18-2, 18-3, 18-.
4 and is configured to cover the second metal fitting 13 from above the polarizing beam splitter 6R, and the second metal fitting 13 does not hold the side surface of the polarizing beam splitter 6R.

The difference between the light valve mounting apparatus according to the present embodiment and the light valve mounting apparatus according to the second embodiment shown in FIG. 5 is that the holding members 18-1, 18-2, and 18 in FIG. The only difference is that −3 and 18-4 are removed, and the side surfaces of the polarization beam splitter 6 </ b> R are held by the legs 14 and 15 of the second metal fitting 13.

That is, in the present embodiment, the second side disposed close to the X-direction side surface (parallel to the YZ plane) of the polarization beam splitter 6R so as to cover most of the side surface.
In the bent portion 14-3 of the metal fitting 13 of FIG.
One hole 14-3-1 is formed. Similarly, the bent portion 15-3 (see FIG. 5) of the second metal fitting 13 disposed close to the side surface (parallel to the YZ plane) of the polarization beam splitter 6R on the −X direction side so as to cover most of the side surface. ), Three holes 14-3-
1 (not shown in FIG. 5) are formed. After arranging the polarizing beam splitter 6R and temporarily fixing it,
An adhesive is poured from the hole portions 14-3-1 and 15-3-1 so that the two side surfaces of the polarizing beam splitter 6R and the second
And the bent portions 14-3 and 15-3 of the metal fitting 13 are bonded and fixed, respectively. Thereby, the leg 1 of the second metal fitting 13 is formed.
4 and 15 are polarized beam splitters 6 through the adhesive.
The R side will be retained.

According to the present embodiment, since the legs 14, 15 of the second metal fitting 13 hold the side surface of the polarization beam splitter 6R, the holding members 18-1, 18-2, 1 in FIG.
Since a special member for holding the side surface of the polarization beam splitter 6R such as 8-3 and 18-4 is not required,
preferable.

The present embodiment is the same as the above-described second embodiment except for the above points. According to the present embodiment, as in the second embodiment, pixel shift is reduced and The light valve 7R can be securely mounted.

In FIG. 6, reference numeral 50 denotes the substrate.
In FIG. 6, bent portions 14-1-2, 14-2-2, 15-1-2, which serve as contact fixing portions to the substrate portion 50, are provided.
The screw for 15-2-2 screwing is not shown.

In the present embodiment, as described above, the legs 14, 15 of the second metal fitting 13 hold the side surface of the polarizing beam splitter 6R via the adhesive.
It is not limited to such a holding method. For example, the bent portions 14-3 and 15-3 of the second metal fitting 13
A female screw portion is formed instead of the hole portions 14-3-1 and 15-3-1. A screw is screwed into the female screw portion from the side, and a tip of the screw is attached to a side surface of the polarizing beam splitter 6R. The legs 14 and 15 may be brought into contact with each other to hold the side surface of the polarizing beam splitter 6R via the screw.

Although the present embodiment has been described as a modification of the second embodiment shown in FIG. 5, the holding of the side surfaces of the polarizing beam splitter 6R by the legs 14 and 15 is described below. The present invention is also applicable to the first embodiment shown in FIG.

The embodiments of the present invention have been described above, but the present invention is not limited to these embodiments.

The device to which the light valve mounting device according to the present invention can be applied is not limited to the projection type display device shown in FIG.

[0085]

As described above, according to the present invention,
It is possible to provide a light valve mounting device that can perform registration adjustment with less pixel shift and that can securely mount the light valve.

Further, according to the present invention, it is possible to provide a light valve mounting device suitable for disposing a polarizing beam splitter under a light valve.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing a basic configuration of an example of a projection display device that can employ a light valve mounting device according to the present invention.

FIG. 2 is a schematic perspective view showing a specific configuration of an optical configuration of the projection display device shown in FIG.

FIG. 3 is a schematic plan view showing a part of the projection type display device shown in FIGS. 1 and 2;

FIG. 4 is an exploded perspective view showing the light valve mounting device according to the first embodiment of the present invention together with a polarizing beam splitter.

FIG. 5 is a perspective view showing a second fitting of the light valve mounting device according to the second embodiment of the present invention.

FIG. 6 is a side view showing a second metal fitting of a light valve mounting device according to a third embodiment of the present invention, together with a polarizing beam splitter.

FIG. 7 is a configuration diagram illustrating an example of a conventional projection display device.

FIG. 8 is an exploded perspective view showing an example of a conventional solid-state imaging device mounting device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Integrator 2, 4B, 5R, 5G, 5B Folding mirror 3 Cross dichroic mirror 6R, 6G, 6B Polarization beam splitter 7R, 7G, 7B Light valve 8 Dichroic prism 10 1st metal fitting 10a 1st metal fitting opening 11th Leg of the first metal fitting 13 second metal fitting 13a opening of the second metal fitting 14, 15, 16 leg of the second metal fitting 14-1, 14-2, 15-1, 15-2 bent part (first 1-part) 14-1-1, 14-2-1 Bent part (second part) 15-1-1, 15-2-1 Bend part (second part) 21 Peripheral part 50 Substrate part 99 Light source 101, 102R, 102G, 103B, 104B, 1
05B Illumination lens 106 Projection lens

Claims (5)

[Claims] A first metal fitting having a light valve fixed thereto and having an opening at a position corresponding to a light incident part of the light valve; and a first metal fitting formed at a position corresponding to the opening of the first metal fitting. A second metal fitting having an opening, and a plurality of legs fixed to the substrate and supporting a peripheral portion of the opening in a state of being floated with respect to the substrate, the second metal having: At least two of said plurality of legs of
The two legs are at least one first portion having a surface substantially perpendicular to the surface of the light valve, and a second portion continuous with each of the at least one first portion; And a second portion having a surface substantially parallel to the surface of the light valve, and the second portion of the second metal fitting and a predetermined portion of the first metal fitting are soldered. A light valve mounting device, being fixed. 2. The plurality of legs of the second metal fitting are arranged so as to cover at least a part of each of at least two side surfaces of a polarizing beam splitter, and the opening of the second metal fitting is provided with the polarized light beam. 2. The light valve mounting device according to claim 1, wherein the light emitted from the splitter and incident on the light valve passes therethrough. 3. The light valve mounting device according to claim 2, wherein a side surface of the polarization beam splitter is held by the plurality of legs of the second metal fitting. 4. The polarization beam splitter according to claim 2, wherein the plurality of legs of the second metal fitting are arranged so as to cover at least a part of each of only two side surfaces of the polarization beam splitter. Light valve mounting device. 5. The light valve mounting device according to claim 1, wherein the second fitting is formed by bending a plate-like member having a predetermined shape.