JP4475035B2 - Spatial light modulation element mounting method and spatial light modulation element mounting apparatus - Google Patents

Description

  The present invention relates to a spatial light modulation element mounting method and a spatial light modulation element mounting apparatus used for a projection display device or the like.

  Projection display devices for enlarging and projecting color images include a transmission type that transmits light to a spatial light modulation element such as a liquid crystal panel and a reflection type that reflects light. The emitted white light is color-separated by an optical block having a function of separating the light into three primary colors of R (red), G (green), and B (blue), and the space for each color corresponding to the three primary colors. Projected into the light modulation element (liquid crystal panel), and color synthesized light synthesized by an optical block with the function of color synthesizing each color light modulated according to the video signal by the spatial light modulation element for each color The light is emitted to the lens side.

At this time, after adjusting the attachment position of each spatial light modulation element (liquid crystal panel) for RGB three colors with respect to the optical block having the color separation function and / or the color synthesis function, each spatial light modulation element is fixed to the optical block. Several methods have been proposed (see, for example, Patent Document 1 and Patent Document 2).
Japanese Utility Model Publication No. 5-20076 JP-A-10-10994.

FIG. 14 is an exploded perspective view showing a mounting device for a solid-state imaging device in Conventional Example 1,
FIG. 15 is an exploded perspective view showing the configuration of the liquid crystal panel unit in the projection display device in the second conventional example.

  First, the solid-state image sensor mounting device 100 in the conventional example 1 shown in FIG. 14 is disclosed in the above-described Patent Document 1 (Japanese Utility Model Publication No. 5-20076). Explained.

  As shown in FIG. 14, in the mounting apparatus 100 for the solid-state imaging device according to the conventional example 1, three sets (one set of them) respectively corresponding to the three primary color lights of R (red), G (green), and B (blue). Since each set of devices has exactly the same configuration, a set of devices will be described. The spectroscopic prism 101 is sandwiched between a pair of left and right support substrates 102A and 102B.

  In addition, the solid-state imaging element 103 is fixed to the first metal fitting 104 using two screws 105. At this time, the first metal fitting 104 is formed by bending the side portions of the flat portion 104a on which the solid-state imaging device 103 is placed so as to face each other in a U-shape, and the square hole 104a1 is formed at the center of the flat portion 104a. Two leg portions 104b and 104c protrude outwardly from the left and right ends of the flat portion 104a.

  A second metal fitting 106 is fixed on one incident surface 101 a of the spectroscopic prism 101. In the second metal fitting 106, a square hole 106a1 is formed through the center of the flat portion 106a, and leg portions 106b and 106c are provided on the left and right ends of the flat portion 106a. Two protrusions are formed outwardly corresponding to 104c.

  A packing member 107 is interposed between the first metal fitting 104 and the second metal fitting 106.

  Then, the legs 104b and 104c of the first metal fitting 104 and the second metal fitting are adjusted while adjusting the position so that the registration is the best with respect to the solid-state imaging device 103 facing one incident surface 101a of the spectroscopic prism 101. By soldering the legs 106 b and 106 c of the solder 106 with the solder A, the solid-state image sensor 103 side is fixed on one incident surface 101 a of the spectroscopic prism 101.

  Next, the projection display device 200 in Conventional Example 2 shown in FIG. 15 is disclosed in the above-mentioned Patent Document 2 (Japanese Patent Laid-Open No. 10-10994), and here, it will be briefly described with reference to Patent Document 2. To do.

  As shown in FIG. 15, in the projection display device 200 in the conventional example 2, the prism composite 201 is formed in a rectangular shape by combining four prisms having a right isosceles triangular cross section. In FIG. 201, transmissive liquid crystal panel units 210R, (210G, not shown), (210B, not shown) are attached to three light incident surfaces 201r, 201g, 201b corresponding to R, G, B. It has been.

  Here, only the R liquid crystal panel unit 210R attached to the R light incident surface 201r of the prism composite 201 will be described. The panel frame 211 connects the first frame plate 212 and the flexible printed wiring board 213R. It is composed of a liquid crystal panel 214R and a second frame plate 215.

  At this time, the first frame plate 212 has a rectangular opening 212a for passing light therein, and an engagement hole 212b is formed in the periphery of the four corners of the rectangular opening 212a. On the other hand, the second frame plate 215 is formed to be slightly smaller than the first frame plate 212 with substantially the same outer size as the liquid crystal panel 214R. Accordingly, the panel frame 211 is configured by fitting the liquid crystal panel 214R and the second frame plate 215 from the back side of the first frame plate 212.

  The fixed frame plate 216 is a rectangular frame plate in which a rectangular opening 216a for passing light is formed. The fixed frame plate 216 is fixed to the R light incident surface 201r of the prism composite 201 with an adhesive. .

  Further, the intermediate frame plate 217 interposed between the panel frame 211 and the fixed frame plate 216 is a rectangular frame plate having substantially the same outer size as the fixed frame plate 216 and having a rectangular opening 217a for passing light. In addition, engagement protrusions 217 b are formed at the four corners of the rectangular opening 217 a so as to protrude toward the engagement hole 212 b formed in the first frame plate 212. The intermediate frame plate 217 includes four screws 218 (only one is shown in the figure) inserted into the two holes 217c and 217d in the upper and lower portions that are perforated here, and the R light incident surface of the prism composite 201. The fixing frame plate 216 bonded to the 201r is screwed into screw holes 216b and 216c formed at two positions above and below the fixed frame plate 216.

  Thereafter, the four engagement protrusions 217b formed on the intermediate frame plate 217 are inserted into the four engagement holes formed in the first frame plate 212 to hold the liquid crystal panel 214R. Is positioned on the intermediate frame plate 217 and temporarily fixed thereto. In this state, by adjusting the insertion amount of four wedges 219 (only one is shown in the figure), focus adjustment and alignment adjustment are performed on the liquid crystal panel 214R, and each wedge 219 is moved to the panel frame plate 211 and the middle. Since it is adhesively fixed to the frame plate 217, the liquid crystal panel 214R can be positioned and fixed with respect to the R light incident surface 201r of the prism composite 201, and in addition, the defective liquid crystal panel 214R can be replaced. Is disclosed.

  By the way, according to the mounting apparatus 100 of the solid-state imaging device in the above-described conventional example 1, the first metal fitting 104 to which the solid-state imaging device 103 is attached after the position adjustment is performed so that the registration to the solid-state imaging device 103 is the best. The second metal fitting 106 fixed to the spectroscopic prism 101 is soldered with the solder A. However, when the solder A is fixed, there is a problem that an attachment error of several μm occurs due to the shrinkage of the solder A.

  On the other hand, the solid-state image sensor 103 with a large number of display pixels has been used in recent years due to high definition, and the size of one pixel has come to be less than 10 μm. When the size is as large as several tens of μm, the mounting error of several μm does not matter, but when the size of one pixel is 10 μm or less, the mounting error of several μm becomes a registration error and color shift occurs. End up. Further, when the first and second metal fittings 104 and 106 are soldered, only one of the four leg portions (104b, 104c) and (106b, 106c) can be soldered one by one. There is also a problem that it takes time to perform the attachment.

  Further, according to the projection display device 200 in the second conventional example, after the focus adjustment and alignment adjustment to the liquid crystal panel 214R, the panel frame plate 211 to which the liquid crystal panel 214R is attached is connected to the fixed frame plate 216 via the intermediate frame plate 217. Since the liquid crystal panel 214R is defective, the liquid crystal panel 214R can be replaced. However, when the panel frame plate 211 is fixed to the fixed frame plate 216 via the intermediate frame plate 217, the screw 218 is caused by vibration or the like. May be loosened and the liquid crystal panel 214R may be misaligned.

  Therefore, when the spatial light modulation element (liquid crystal panel) side is fixed to an optical block having a color separation function and / or a color synthesis function in a state where focus adjustment and alignment adjustment are performed, the production efficiency is high and the spatial light modulation element There is a demand for a spatial light modulation element mounting method and a spatial light modulation element mounting apparatus that do not cause a shift in the mounting position of the optical block.

The present invention has been made in view of the above problems, and the invention according to claim 1 is fixed in a state in which the position of the spatial light modulation element side is adjusted with respect to an optical block having a color separation function and / or a color composition function. In the method of attaching the spatial light modulation element,
Bonding the mounting bracket to the optical block using an adhesive;
Pre-assembling the spatial light modulator side on the back surface of the first frame plate;
A step of temporarily fixing the first and second frame plates by superimposing the back surface of the second frame plate on the surface of the first frame plate assembled on the spatial light modulation element side;
Bonding the second frame plate to the mounting bracket using an adhesive in a state where the spatial light modulation element is moved in a focus direction integrally with the first and second frame plates and the focus is adjusted;
Bonding the first frame plate and the second frame plate using an adhesive in a state in which the spatial light modulation element is moved in the alignment adjustment direction integrally with the first frame plate and the alignment adjustment is performed. It is a spatial light modulation element attachment method characterized by having.

The invention according to claim 2 is a spatial light modulation element mounting device for mounting a spatial light modulation element to which a flexible substrate is connected to an optical block,
A space including a first frame plate whose outer shape is a rectangular shape, wherein the spatial light modulator is disposed on one surface side of the first frame plate so that the flexible substrate extends from one side of the outer shape. A light modulation element assembly;
A mounting bracket secured to the optical block;
A second frame plate having one surface overlapped and fixed to a surface opposite to the one surface side of the first frame plate, and the other surface side fixed to the mounting bracket;
The first frame plate is
A first pedestal portion formed to protrude toward the second frame plate on the one side, and a first through hole formed on the side opposite to the one side;
The second frame plate is
A second through hole formed at a position corresponding to the first pedestal portion in the first frame plate and a position corresponding to the first through hole in the first frame plate on the first frame plate. A second pedestal formed to project toward the
The spatial light modulation element assembly can irradiate light to the second through-hole from the optical block side to the optical block, and the first penetration from the side opposite to the optical block. It is attached so that light can be irradiated to the hole,
Spatial light comprising an ultraviolet curable adhesive that is filled and cured so as to fix the first frame and the second frame in the first through hole and the second through hole. It is a modulation element mounting apparatus.

The invention described in claim 3 is the spatial light modulator mounting device according to claim 2, wherein
And Fuokasu the mounting bracket for adjusting the guide pin attached to one of the second frame plate, pin hole for inserting the guide pin is drilled in the other with respect to the spatial light modulator, a spatial light modulator mounting apparatus characterized by have a.

According to the onset bright, the fixation to the optical block of the spatial light modulator, no occurrence of positional deviation, thereby improving the quality and reliability.

  An embodiment of a spatial light modulation element mounting method and a spatial light modulation element mounting apparatus according to the present invention will be described below in detail with reference to FIGS.

  FIG. 1 is a principle diagram of a projection display device to which a spatial light modulation element mounting method and a spatial light modulation element mounting device according to the present invention are applied.

  Before describing the spatial light modulation element mounting method and the spatial light modulation element mounting apparatus according to the present invention, the principle of a projection display apparatus to which this is applied will be described with reference to FIG.

  As shown in FIG. 1, a projection display device 1 to which a spatial light modulation element mounting method and a spatial light modulation element mounting device according to the present invention are applied is configured as, for example, a reflection type, and includes a light source unit 5, color separation and A color synthesis optical system 10 and a projection lens 50 are provided.

  The light source unit 5 described above is provided with a reflecting mirror 6, a light source 7 using a metal halide lamp, a xenon lamp, a halogen lamp or the like to emit white light, and a p-polarized light of white light provided in front of the light source 7. And a polarizing plate 8 having a transmission axis selected so that only the light is transmitted.

  Accordingly, when the white light from the light source 7 passes through the polarizing plate 8, three colors of Rp light, Gp light, and Bp light corresponding to R, G, and B are incident on the color separation and color synthesis optical system 10. .

  The color separation and color synthesis optical system 10 described above color-separates white light emitted from the light source unit 5 into R, G, and B primary colors, and these three primary colors correspond to R, G, and B, respectively. Guided to the reflection type spatial light modulation elements 34R, 34G, 34B in the three reflection type spatial light modulation element units 30R, 30G, 30B, and further according to the video signal by the reflection type spatial light modulation elements 34R, 34G, 34B of each color. A function of emitting color-combined light obtained by color-combining the light-modulated color lights to the projection lens 50 side is provided.

  At this time, the reflective spatial light modulators 34R, 34G, and 34B corresponding to the three primary color lights of R, G, and B use, for example, reflective liquid crystal panels. Hereinafter, the reflective spatial light modulators 34R, 34G, and 34B are used. Are referred to as reflective liquid crystal panels 34R, 34G, 34B.

  More specifically, in the color separation and color synthesis optical system 10, the four first to fourth polarizing beam splitters 11 to 14 formed in a rectangular parallelepiped shape (including a cubic shape) using optical glass are provided on the upper surface. When viewed from the side, the polarization separating surfaces 11a to 14a are arranged in an X shape.

  At this time, in the plan view of FIG. 1, the first polarizing beam splitter 11 faces the light source unit 5, the second polarizing beam splitter 12 is disposed on the right side of the first polarizing beam splitter 11, and the first A third polarizing beam splitter 13 is disposed below the polarizing beam splitter 11, and a fourth polarizing beam splitter 14 is disposed below the second polarizing beam splitter 12 and to the right of the third polarizing beam splitter 13. The fourth polarization beam splitter 14 faces the projection lens 50. Further, the light incident surface of the first polarizing beam splitter 11 and the light emitting surface of the fourth polarizing beam splitter 14 are arranged in relation to various optical function plates 16 to 22 described later and the arrangement of the reflective liquid crystal panels 34R, 34G, and 34B. They are orthogonal due to the relationship.

  Further, the first polarizing beam splitter 11 on the light source unit 5 side where white light is incident and the fourth polarizing beam splitter 14 on the projection lens 50 side which emits color synthesized light are formed in a large size, while the first The second and third polarizing beam splitters 12 and 13 are formed to be slightly smaller than the first and fourth polarizing beam splitters 11 and 14.

  Further, each of the polarization separation surfaces 11a to 14a of the first to fourth polarization beam splitters 11 to 14 has a rectangular shape with a semi-transmissive / reflective polarizing film that transmits p-polarized light and reflects s-polarized light. It is formed along a diagonal line.

  In the following description, as will be described later, the three colors of Rp light, Gp light, and Bp light indicate p-polarized light corresponding to R, G, and B, respectively, while the three colors of Rs light, Gs light, and Bs. The light indicates s-polarized light corresponding to R, G, and B, respectively.

  In addition, a reflective liquid crystal panel 34R for R and a reflective liquid crystal panel 34G for G are arranged to face the mutually orthogonal side surfaces 12r and 12g of the small-sized second polarizing beam splitter 12, respectively, A B-type reflective liquid crystal panel 34 </ b> B is disposed to face the side surface 13 b of the third polarizing beam splitter 13. As a result, the reflective liquid crystal panels 34R, 34G, and 34B can be arranged on the substantially extended lines of the respective frames of the first and fourth polarization beam splitters 11 and 14, so that the color separation and color synthesis optical system 10 can be reduced in size. it can.

  The first to fourth polarization beam splits 11 to 14 can be formed in the same size. In this case, the reflection type liquid crystal panels 34R, 34G, and 34B are connected to the first and fourth polarization beam splits 11, The color separation and color synthesis optical system 10 is increased in size because it is arranged outside the extended lines of the 14 frames.

  The light incident surface of the first polarizing beam splitter 11 on the light source unit 5 side has a notch filter plate 16 that cuts light having a wavelength near 580 nm and a wavelength selection function that rotates the polarization plane of B light by 90 °. A polarizing plate 17 (hereinafter referred to as a B polarizing plate) 17 is installed. In addition, a wavelength-selective polarization conversion plate (hereinafter referred to as a G polarization conversion plate) having a function of rotating the polarization plane of the G light by 90 ° between the first polarization beam splitter 11 and the second polarization beam splitter 12. ) 18 is installed. A wavelength-selective polarization conversion plate (hereinafter referred to as an R polarization conversion plate) having a function of rotating the polarization plane of the R light by 90 ° between the second polarization beam splitter 12 and the fourth polarization beam splitter 14. ) 19 is installed. Further, a half-wave plate 20 for adjusting polarization is installed between the first polarizing beam splitter 11 and the third polarizing beam splitter 13. A wavelength-selective polarization conversion plate (hereinafter referred to as a B polarization conversion plate) having a function of rotating the polarization plane of the B light by 90 ° between the third polarization beam splitter 13 and the fourth polarization beam splitter 14. ) 21 is installed. Further, on the light exit surface of the fourth polarizing beam splitter 14 on the projection lens 50 side, the return light is rotated by λ / 4 with respect to the wavelength λ of the exit light emitted from the exit surface, and the return light is color-separated and color-combined optical system. A ghost buster plate 22 is installed to prevent it from entering the inside.

  Therefore, among the components described above, the notch filter plate 16, the B polarization conversion plate 17, the G polarization conversion plate 18, the R polarization conversion plate 19, the half-wave plate 20, the B polarization conversion plate 21, and the ghost buster. Since each of the plates 22 has a unique optical function when transmitting light, these plates may be collectively referred to as an optical function plate formed as a light transmission type hereinafter.

  Next, the operation of the color separation and color synthesis optical system 10 configured as described above will be described. The white light composed of the Rp light, Gp light, and Bp light of the p-polarized light obtained from the light source unit 5 is first converted into a notch filter plate. When the light having a wavelength near 580 nm is cut by the notch filter plate 16 and then incident on the B polarization conversion plate 17, the B polarization conversion plate 17 converts the p-polarized Bp light into the s-polarized light. While being converted into Bs light and incident on the first polarizing beam splitter 11, the B polarization conversion plate 17 does not act on the p-polarized Rp light and Gp light, so the Rp light and Gp light are B The light passes through the polarization conversion plate 17 and enters the first polarization beam splitter 11.

  Then, the p-polarized Rp light and Gp light incident on the first polarization beam splitter 11 pass through the polarization separation surface 11a, go straight as it is, and enter the G polarization conversion plate 18, then the G polarization conversion plate 18 is Since the p-polarized light has no effect on the Rp light, the Rp light passes through the G-polarization conversion plate 18 and enters the second polarization beam splitter 12, and at the G-polarization conversion plate 18, The Gp light is polarized and converted into s-polarized Gs light and enters the second polarization beam splitter 12.

  Thereafter, the p-polarized Rp light incident on the second polarization beam splitter 12 passes through the polarization separation surface 12a and enters the reflective liquid crystal panel 34R in the R reflective spatial light modulator unit 30R. The reflective liquid crystal panel 34R undergoes light modulation in accordance with the video signal corresponding to R, and is Rs light of the s-polarized component generated by light modulation here, and is emitted from the reflective liquid crystal panel 34R. After being reflected by 12 a, it turns 90 ° and enters the R polarization conversion plate 19.

  On the other hand, the s-polarized Gs light incident on the second polarization beam splitter 12 is reflected by the polarization splitting surface 12a and then turned 90 ° to turn the reflective liquid crystal in the G reflective spatial light modulation element unit 30G. The light enters the panel 34G, undergoes light modulation according to the video signal corresponding to G in the reflective liquid crystal panel 34G, and becomes Gp light of the p-polarized component generated by light modulation here, and is reflected from the reflective liquid crystal panel 34G. The light is emitted, passes through the polarization separation surface 12a, and enters the R polarization conversion plate 19.

  The s-polarized Rs light incident on the R-polarization conversion plate 19 is converted into p-polarized Rp light and incident on the fourth polarization beam splitter 14, while entering the R-polarization conversion plate 19. Since the p-polarized Gp light does not act at all, the Gp light passes through the R polarization conversion plate 19 and enters the fourth polarizing beam splitter 14.

  Thereafter, both the Rp light and Gp light of the p-polarized light incident on the fourth polarizing beam splitter 14 pass through the polarization separation surface 14a and go straight as it is, and are emitted to the projection lens 50 side through the ghost buster plate 22. The At this time, as described above, the ghost buster plate 22 is rotated by λ / 4 with respect to the wavelength λ of the light emitted from the fourth polarizing beam splitter 14 so that the return light does not enter the color separation and color synthesis optical system 10. To prevent.

  Further, the s-polarized Bs light incident on the first polarization beam splitter 11 is reflected by the polarization separation surface 11a, then turned 90 ° and incident on the half-wave plate 20, and is polarized by the half-wave plate 20. The light enters the third polarizing beam splitter 13 after being adjusted. Thereafter, the s-polarized Bs light incident on the third polarization beam splitter 13 is reflected by the polarization separation surface 13a and then turned 90 ° to reflect in the reflective spatial light modulation element unit 30B for B. The light enters the liquid crystal panel 34B, undergoes light modulation according to the video signal corresponding to B by the reflection type liquid crystal panel 34B, and becomes Bp light of the p-polarized component generated by light modulation here, and the reflection type liquid crystal panel 34B. , And passes through the polarization separation surface 13a and travels straight and enters the B polarization conversion plate 21. The p-polarized component Bp light incident on the B polarization conversion plate 21 is converted into s-polarized Bs light and then incident on the fourth polarization beam splitter 14. Further, the s-polarized Bs light incident on the fourth polarization beam splitter 12 is reflected by the polarization separation surface 14 a and then turned 90 ° and emitted to the projection lens 50 side through the ghost buster plate 22. Therefore, the color combined light obtained by combining the Rp and Gp light of the p-polarized light and the Bs light of the s-polarized light is emitted from the light exit surface of the fourth polarizing beam splitter 14 to the projection lens 50 side via the ghost buster plate 22. Has been.

  Next, a spatial light modulation element mounting method and a spatial light modulation element mounting device according to the present invention will be described with reference to new FIGS.

2 is an overall perspective view showing the color separation and color synthesis optical system shown in FIG.
FIG. 3 is an exploded perspective view showing the R reflective spatial light modulation element unit shown in FIG. 2 and the first and second mounting brackets to be fixed to the second polarizing beam splitter,
4 is a perspective view showing a state in which a reflective liquid crystal panel for R is fixed to a heat sink in the reflective spatial light modulation element unit for R shown in FIG.
FIG. 5 is a perspective view for explaining the positioning of the heat sink and the aperture mask plate when the aperture mask plate is covered with the heat sink on which the reflective liquid crystal panel for R is fixed,
FIG. 6 is a perspective view showing a state in which an aperture mask plate is covered with a heat sink on which a reflective liquid crystal panel for R is fixed,
FIG. 7 shows a state in which the wave plate support frame plate having the quarter wavelength plate fixed along the inner periphery of the three guide plates fixed by caulking on the surface of the aperture mask plate is rotatably fitted. Perspective view,
FIG. 8 shows the first frame plate overlaid on the three guide plates fixed by caulking on the surface of the aperture mask plate, and the first frame plate is replaced with three guide plates and a wave plate support frame by three screws. The perspective view which showed the state which screwed on the heat sink via the board and the aperture mask board, and assembled the liquid crystal panel subassembly,
FIG. 9 shows a total of three locations protruding at a slight height on the front surface of the first frame plate and the back surface of the second frame plate when the second frame plate is overlaid on the first frame plate in the liquid crystal panel subassembly. The perspective view which showed the relationship between the base part of this, and the round hole for adhesive filling of a total of three places pierced in the 1st, 2nd frame board,
FIG. 10 is a perspective view showing a state in which a reflection type spatial light modulation element unit for R is configured by superimposing a second frame plate on a first frame plate in a liquid crystal panel subassembly.
FIG. 11 shows the first and first liquid crystal panel subassemblies for R and the second frame plate temporarily fixed by leaf springs, and the reflective spatial light modulation element unit is bonded to the upper and lower surfaces of the second polarizing beam splitter. 2 is a perspective view showing a state temporarily attached to the mounting bracket;
FIG. 12 is a perspective view showing a state in which the reflective spatial light modulation element unit is focus-adjusted and alignment-adjusted by an adjustment jig while the R liquid crystal panel subassembly and the second frame plate are temporarily fixed by a leaf spring. Figure,
FIG. 13 shows a state after the R-type reflective spatial light modulation element unit is bonded to the first and second mounting brackets bonded to the upper and lower surfaces of the second polarizing beam splitter using an ultraviolet curable adhesive. It is a perspective view.

  First, as shown in FIG. 2, in the color separation and color synthesis optical system 10, as described above, four first to fourth polarizations formed in a rectangular parallelepiped shape (including a cubic shape) using optical glass are used. The lower surfaces of the beam splitters 11 to 14 are fixed in advance on the optical base 15 with an adhesive so that the polarization separation surfaces 11a to 14a are X-shaped when viewed from the upper surface side. In addition, the large-size first and fourth polarizing beam splitters 11 and 14 are diagonally arranged and positioned on the light source unit side and the projection lens side, respectively, and the small-sized second and third polarizing beam splitters are arranged. 12, 13 are arranged diagonally.

  Further, the reflective spatial light modulation element units 30R and 30G for R and G on the side surfaces 12r and 12g (FIG. 1) orthogonal to each other of the small-sized second polarizing beam splitter 12 are adjusted in focus and alignment as will be described later. The first and second mounting brackets 23 and 26 (26 is shown in FIG. 3) bonded to the upper and lower surfaces of the second polarizing beam splitter 12 in the state where the process is finished are bonded using an ultraviolet curable adhesive. At the same time, the third polarization beam splitter 13 is in a state where the B reflection spatial light modulation element unit 30B has finished the focus adjustment and alignment adjustment on one side surface 13b (FIG. 1) of the small-sized third polarization beam splitter 13. The first and second mounting brackets 23 and 26 (26 is shown in FIG. 3) bonded to the upper and lower surfaces of the upper and lower surfaces, respectively. It is bonded with sexual adhesive.

  In FIG. 2, illustration of various optical function plates 16 to 22 is omitted.

  At this time, all of the three sets of reflective spatial light modulation element units 30R, 30G, and 30B corresponding to RGB have the same structure, and all the attachment methods to the second and third polarization beam splitters 12 and 13 are also included. Therefore, in the following description, only the structure and mounting method of the reflective spatial light modulation element unit 30R for R will be described, and the case where the above-described second polarization beam splitter 12 is used as an optical block will be described. .

  As shown in FIG. 3, the first mounting bracket 23 bonded to the upper surface of the second polarizing beam splitter 12 with an adhesive is bent using a sheet metal material, and the upper surface 23a of the first mounting bracket 23 is bent. The bent pieces 23b, 23b are bent upward at substantially right angles from the mutually orthogonal sides, and two holes 23c are formed in each of the bent pieces 23b, 23b. Here, one of the bending pieces 23b, 23b of the first mounting bracket 23 is positioned on the side surface 12r side of the second polarizing beam splitter 12, and the reflection type liquid crystal in the reflection type spatial light modulation element unit 30R for R which will be described later. Corresponding to the panel 34R, the other of the bent pieces 23b, 23b is located on the side surface 12g side of the second polarizing beam splitter 12 and is a reflective liquid crystal panel 34G in the reflective spatial light modulation element unit 30G for G (FIG. 1). ).

  A spacer plate 24 is attached to one bent piece 23b of the first mounting bracket 23 so that the position of the spacer plate 24 can be adjusted by using two screws 25. The two screws 25 are attached to one bent piece 23b. The two screw holes 24a formed in the lower part of the spacer plate 24 are screwed through the two holes 23c formed. In addition, two pin holes 24b through which two guide pins 46 attached to the upper portion of the second frame plate 45, which will be described later, are inserted and drilled in the upper portion of the spacer plate 24, and A U-shaped cutout 24c is formed between the two pin holes 24b.

  The second mounting bracket 26 bonded to the lower surface of the second polarizing beam splitter 12 with an adhesive is also bent using a sheet metal material, and a bent piece 26b is formed from the lower surface 26a of the second mounting bracket 26. Two guide pins 27, which are located on the side surface 12r side of the second polarizing beam splitter 12 and bent downward at a substantially right angle and whose tip is tapered to adjust the focus on the bent piece 26b, will be described later. The reflection type spatial light modulation element unit 30R is horizontally provided toward the second frame plate 45 side.

  At this time, the spacer plate 24 attached to the first mounting bracket 23 is provided as necessary in order to adjust the variation in the mounting pitch between the two upper and lower guide pins 46, 27. When the spacer plate 24 is not used, a pin hole (not shown) for inserting the two guide pins 46 into the first mounting bracket 23 may be directly drilled.

  The first and second mounting brackets 23 and 26 have a function of bonding and fixing an R reflective spatial light modulation element unit 30R described below.

  Next, the reflective spatial light modulation element unit 30R for R includes a liquid crystal panel subassembly 31R in which the R liquid crystal panel 34R is preassembled on the first frame plate 42 side, and the liquid crystal panel 34R in the liquid crystal panel subassembly 31R. The first and second mounting brackets 23 are bonded to the upper and lower surfaces of the second polarizing beam splitter 12 by adhering the liquid crystal panel sub-assembly 31R using an ultraviolet curable adhesive in a state in which the focus adjustment and alignment adjustment are performed. 26 and a second frame plate 45 that is bonded to the substrate 26 using an ultraviolet curable adhesive.

  Here, the liquid crystal panel subassembly 31R is formed of an aluminum material in a substantially rectangular parallelepiped shape, the heat sink 32 is flat on the front surface 32a side and is uneven in the vertical direction on the back surface 32b side, and the recess 32c formed on the front surface 32a of the heat sink 32. An R reflective liquid crystal panel 34R fixed with an adhesive and having an R flexible printed wiring board 33R connected thereto, and a lid placed in a state of being positioned on the front surface 32a of the heat sink 32 and extending from the front surface 35a to the back surface 35b Aperture mask plate 35 formed through light-transmitting rectangular hole 35c, and the inside of three guide plates 36 to 38 fixed by caulking to the upper left and right and lower portions of surface 35a of aperture mask plate 35. The quarter-wave plate 39 is fitted from the front surface 40a to the back surface 40b. The wave plate support frame plate 40 fitted in the stepped rectangular hole 40c that has been passed through, and the guide plates 36 to 38 that are crimped on the surface 35a of the aperture mask plate 35 are overlaid, and the packing material 41 is backed from the surface 42a. Formed on the surface 32a of the heat sink 32 through the guide plates 36 to 38, the wave plate support frame plate 40, and the aperture mask plate 35 by the three screws 43 in a state of being fitted in the rectangular hole 42c penetrated through 42b. The first frame plate 42 is screwed into the three screw holes 32d.

  At this time, the three screws 43 are formed at three positions formed in the aperture mask plate 35 through the guide plates 36 to 38 from the three circular holes 42d formed in the upper left and right sides and the lower center of the first frame plate 42. Screwed into three screw holes 32d formed on the surface 32a of the heat sink 32 through the round holes 35d.

  Further, the second frame plate 45 for bonding the first frame plate 42 in the liquid crystal panel subassembly 31R is formed with a rectangular hole 45c for inserting the packing material 41 extending from the front surface 45a to the back surface 45b. In addition, two guide pins 46 whose tips are tapered to adjust the focus are provided on the upper surface 45a so as to extend toward the spacer plate 24 described earlier with reference to FIG.

  After the liquid crystal panel subassembly 31R is assembled, the front surface 42a of the first frame plate 42 and the back surface 45b of the second frame plate 45 in the liquid crystal panel subassembly 31R are opposed to each other and temporarily fixed as described later. A plate spring 47 (FIGS. 11 and 12) serving as a member is used to temporarily fix the liquid crystal panel subassembly 31R and the second frame plate 45 while sandwiching them, and in this state, a reflective spatial light modulation element unit 30R for R is used. Is temporarily assembled.

  More specifically, step by step, first, as shown in an enlarged view in FIG. 4, the heat sink 32 formed of an aluminum material in a substantially rectangular parallelepiped shape has a front surface 32 a formed on a flat surface, and a back surface 32 b A concave portion 32c which is formed in a vertical concavo-convex shape and is recessed by one step from the surface 32a is formed with a bottom from the upper side to the lower side, and an R flexible printed wiring board 33R is connected to the concave portion 32c. The reflective liquid crystal panel 34R is fixed using an adhesive. At this time, the surface of the reflective liquid crystal panel 34R is covered with a thin cover glass.

  Further, a total of three screw holes 32d for screwing the first frame plate 42 (FIG. 3) are formed in the upper left and right and lower center of the surface 32a of the heat sink 32, and an aperture mask is formed in the upper right and lower left of the surface 32a. Two positioning holes 32e for positioning the plate 35 (FIG. 3) are formed, and two caulking projections are formed by guide plates 38 that are caulked to the lower part of the surface 35a of the aperture mask plate 35 on the lower left and right of the surface 32a. A total of two caulking escape holes 32f for avoiding the portion 38a (FIG. 5) are formed.

  In addition, a plurality of fins 32g are formed on the back surface 32b of the heat sink 32 so as to be parallel to each other in the vertical direction, and gripping portions 32h are inserted into the upper left and right and lower left and right of the back surface 32b by one step from the back surface 32b. The four gripping portions 32h are gripped by the bifurcated claw portions 61a of the two upper and lower hands 61 provided on the adjusting jig 60 (FIG. 13) described later.

  Next, as shown in an enlarged view in FIG. 5, when the back surface 35b of the aperture mask plate 35 is positioned on the front surface 32a of the heat sink 32 to which the R reflective liquid crystal panel 34R is fixed, the aperture mask is aligned. The plate 35 is made of sheet metal and is bent so that the left and right side surfaces on the back surface 32b side are fitted to the left and right side surfaces of the heat sink 32 with a lid, and is fixed to the heat sink 32 at a substantially central portion. A rectangular hole 35c is formed to penetrate the screen of the reflective liquid crystal panel 34R.

  Further, a total of three round holes 35d are formed through the aperture mask plate 35 in correspondence with the three screw holes 32d formed in the heat sink 32 in the upper left and right and lower center.

  Further, at the upper right and lower left (upper left and lower right in this figure) of the aperture mask plate 35 on the back surface 35b side, a total of two positioning projections 35e are formed by half punching so as to protrude slightly higher than the back surface 35b. These two positioning projections 35e are fitted into two positioning holes 32e formed on the surface 32a side of the heat sink 32, so that the aperture mask plate 35 is fitted on the surface 32a side of the heat sink 32. Is reliably positioned with respect to the vertical and horizontal directions, so that the screen of the reflective liquid crystal panel 34R fixed to the heat sink 32 can fit into the rectangular hole 35c of the aperture mask plate 35.

  In addition, guide plates 36 to 38 are fixed to the upper left and right and lower portions of the surface 35 a of the aperture mask plate 35 by caulking. The caulking portions of these guide plates 36 to 38 are caulked on the back surface 35 b side of the aperture mask plate 35. It becomes the convex parts 36a-38a and protrudes very slightly.

  After the processing of the aperture mask plate 35 is finished, black coating is applied from the front surface 35a side to the back surface 35b side in order to prevent light reflection.

  Thereafter, the aperture mask plate 35 is placed on the heat sink 32 as shown in FIG. At this time, arc portions 36b to 38b are formed in a substantially arc shape inside the guide plates 36 to 38 that are crimped to the surface 35a side of the aperture mask plate 35 in order to guide the wave plate support frame plate 40 to be rotatable. Is formed.

  As shown in an enlarged view in FIG. 7, the wave plate support frame plate 40 is fitted along the arc portions 36 b to 38 b of the guide plates 36 to 38.

  The above-described wave plate support frame plate 40 is formed in an oval shape by stacking two thin metal plates, and the arm portion 40d is opened from the gap between the guide plates 36 and 37 on the upper surface of the metal plate on the back surface side. The mask plate 35 protrudes upward from the upper end. Further, a stepped rectangular hole 40 c larger than the rectangular hole 35 c of the aperture mask plate 35 is formed inside the wave plate support frame plate 40. That is, the stepped rectangular hole 40c of the wave plate support frame plate 40 is such that the sheet metal material on the back surface side is opened in a large size, and the sheet metal material on the front surface side is opened in a small size from the back surface side so that they are overlapped. Yes.

  The wave plate support frame plate 40 is black-coated from the front surface 40a side to the back surface 40b side to prevent light reflection, and after the black coating, the quarter-wave plate 39 is bonded from the back surface 40b side. It adhere | attaches in the stepped rectangular hole 40c using the agent.

  The outer peripheral portion of the wave plate support frame plate 40 is guided by the arc portions 36 b to 38 b of the guide plates 36 to 38 that are crimped to the surface 35 a side of the aperture mask plate 35, and the arm portion of the wave plate support frame plate 40. By moving 40d to the left and right, the wave plate support frame plate 40 can be rotated about ± 7 °.

  Thereafter, as shown in an enlarged view in FIG. 8, a packing material 41 formed using a rubber material is fitted in a rectangular hole 42c formed in the first frame plate 42 in advance, and this packing material 41 is a wave plate. The inside of the quarter wavelength plate 39 attached to the support frame plate 40 is opened through the inside in accordance with the external size, and the front portion of the packing material 41 is on the side surface 12r (FIG. 3) of the second polarizing beam splitter 12. The contact prevents dust from entering from the surroundings.

  Then, guide plates 36 to 38 in which the back surface 42b side of the first frame plate 42 is crimped to the surface 35a of the aperture mask plate 35 in a state where the packing material 41 is fitted in the rectangular hole 42c formed in the first frame plate 42 in advance. The first frame plate 42 is superposed on the liquid crystal by screwing the first frame plate 42 onto the heat sink 32 via the guide plates 36 to 38, the wave plate support frame plate 40, and the aperture mask plate 35 using three screws 43. Panel subassembly 31R is assembled.

  The above-described first frame plate 42 is formed in a substantially rectangular plate shape using a stainless steel plate, and an upper protruding piece 42e protrudes upward from the upper ends of the guide plates 36 and 37 at the upper central portion, and The upper projecting piece 42e is set to a height lower than the arm part 40d of the wave plate supporting frame plate 40, and an adhesive pedestal part 42f is formed on the upper projecting piece 42e by a half punch. It protrudes and is slightly higher than the surface 42a.

  In addition, a notch portion 42g is divided into left and right portions at the lower left and right portions of the first frame plate 42 and formed symmetrically, and a lower projecting piece 42h is divided into left and right sides inside the left and right notch portions 42g. An inverted U shape is formed so as to project downward from the lower end, and further, between the left and right lower projecting pieces 42 h, to escape the two guide pins 27 that are provided horizontally on the second mounting bracket 26 shown in FIG. 3. Notches 42i are formed, and a total of two round holes 42j for filling the adhesive are formed through the left and right lower projecting pieces 42h.

  Next, as shown in an enlarged view in FIG. 9, when the back surface 45 b of the second frame plate 45 is overlaid on the front surface 42 a of the first frame plate 42, the second frame plate 45 is the same as the first frame plate 42. It is formed in a substantially rectangular plate shape using a stainless steel plate, and a rectangular shape for fitting the leading end side of the packing material 41 fitted in the rectangular hole 42c of the first frame plate 42 also into the second frame plate 45. A hole 45c is drilled through.

  In addition, on the upper left and right sides of the second frame plate 45, cutout portions 45d for escaping the two screws 43 attached to the upper left and right sides on the surface 42a side of the first frame plate 42 are divided into left and right and formed symmetrically. In addition, an upper protruding piece 45e is set at the same height as the upper protruding piece 42e of the first frame plate 42 and protrudes upward on the inner side of the left and right cutout portions 45d. Then, an adhesive in which a round hole 45f for filling an adhesive protrudes from the upper projecting piece 42e at a slight height on the surface 42a side of the first frame plate 42 at the central portion of the upper projecting piece 45e of the second frame plate 45. Opposite the pedestal portion 42f, the pedestal portion 42f is bored with a smaller diameter than the pedestal portion 42f. Further, on the surface 45a side of the second frame plate 45, two guide pins 46 whose tips are tapered to adjust the focus to the left and right of the round hole 45f formed in the upper protruding piece 45e are first shown in FIG. It is installed sideways toward the spacer plate 24 side described with reference to FIG.

  In addition, notch portions 45g are formed on the left and right sides of the second frame plate 45 so as to be divided symmetrically, and lower protrusions 45h are provided on the inner sides of the left and right notch portions 45g. It protrudes downward with a width dimension and a height dimension corresponding to the projecting piece 42h. Then, on the back surface 45b side of the second frame plate 45, adhesive base portions 45j are formed on the left and right lower projecting pieces 42h of the first frame plate 42 on the left and right sides of the lower projecting piece 45h. A total of two protrusions are formed so as to face each of the round holes 42j and have a diameter slightly larger than the round hole 42j and slightly higher than the back surface 42b by a half punch, and between the two pedestal portions 45j. A total of two pin holes 45i are inserted through the second mounting bracket 26 shown in FIG.

  Further, in the lower center below the rectangular hole 45c of the second frame plate 45, an escape hole 45k for escaping one screw 43 attached to the lower center on the surface 42a side of the first frame plate 42 penetrates. It has been drilled.

  Then, when the back surface 45b of the second frame plate 45 is overlaid on the front surface 42a of the first frame plate 42, it becomes as shown in an enlarged view in FIG. 10, and the R liquid crystal panel 34R is placed on the first frame plate 42 side. The liquid crystal panel subassembly 31R assembled in advance and the second frame plate 45 constitute an R-use reflective spatial light modulation element unit 30R.

  At this time, although the packing material 41 is fitted in the rectangular hole 45c of the second frame plate 45, the first and second frame plates 42 and 45 are not bonded to each other and are on the surface 42a of the first frame plate 42. Since only the back surface 45 b of the second frame plate 45 is overlapped, the second frame plate 45 is displaced from the first frame plate 42.

  Therefore, as shown in an enlarged view in FIG. 11, when the back surface 45b of the second frame plate 45 is superimposed on the front surface 42a of the first frame plate 42, the R liquid crystal panel 34R is placed on the first frame plate 42 side. The preliminarily assembled liquid crystal panel subassembly 31R and the second frame plate 45 are temporarily fixed using, for example, a plate spring 47 as shown by a two-dot chain line as a temporary fixing member. Instead of the leaf spring 47, a rubber band (not shown) as a temporary fixing member may be applied to the liquid crystal panel subassembly 31R and the second frame plate 45.

  The plate spring 47 described above is formed in a substantially U shape by a front plate portion 47a, a side plate portion 47b, and a back plate portion 47c using a stainless plate spring or the like, and a second plate is formed on the front plate portion 47a. A cutout 47d for avoiding the packing material 41 fitted into the frame plate 42 is formed. Then, the front plate portion 47 a of the plate spring 47 is brought into contact with the front surface 45 a of the second frame plate 45 while avoiding the packing material 41, and the back plate portion 47 c of the plate spring 47 is brought into contact with the back surface 32 b of the heat sink 32. The first and second frame plates 42 and 45 are temporarily fixed by sandwiching the heat sink 32 and the second frame plate 45 with the spring force of the plate spring 47.

  At this time, as described above, the first mounting bracket 23 is bonded to the upper surface of the second polarizing beam splitter 12 (FIG. 3), and the spacer plate 24 is attached to one bent piece 23b of the first mounting bracket 23. Are attached using two screws 25, and a second mounting bracket 26 is bonded to the lower surface of the second polarizing beam splitter 12, and two guides are attached to a bent piece 26 b of the second mounting bracket 26. A pin 27 is provided horizontally.

  Then, in a state where the liquid crystal panel sub-assembly 31R and the second frame plate 45 are temporarily fixed using a leaf spring 47, two guides horizontally provided on the upper protrusion 45e on the surface 45a side of the second frame plate 45. The pin 46 is inserted in two pin holes 24b drilled in the spacer plate 24 in a state of being filled with an ultraviolet curable adhesive, and two guide pins are installed horizontally on the second mounting bracket 26. 27 is inserted in two pin holes 45i (FIG. 10) formed in the lower protrusion 45h of the second frame plate 45 in a state of being filled with an ultraviolet curable adhesive.

  Here, the upper and lower guide pins 46 and 27 are formed to have an outer diameter of, for example, φ1.5 mm, and the inner diameters of the pin holes 24b and 45i through which the guide pins 46 and 27 are inserted are set to φ1.7 mm to φ2.0 mm. Thus, it is possible to maintain the registration (positional deviation) to the liquid crystal panel 34R satisfactorily. In other words, the inner diameters of the pin holes 24b and 45 with respect to the diameters of the guide pins 46 and 27 are 0.2 mm to 0.5 mm. What is necessary is just to set to a large diameter.

  Thereafter, as shown in an enlarged view in FIG. 12, with the spring force of the leaf spring 47 sandwiching between the heat sink 32 and the second frame plate 45, the upper left and right sides and the lower left and right sides of the back surface 32b of the heat sink 32 are stepped one step. Liquid crystal is integrated with the first and second frame plates 42 and 45 while gripping the four gripping portions 32h formed by the gripping with the forked claws 61a of the upper and lower two hands 61 provided on the adjustment jig 60. First and second mounting brackets 23 in which the second frame plate 45 is mounted on the upper and lower surfaces of the second polarizing beam splitter 12 (FIG. 3) while the panel 34R (FIG. 11) is moved in the focus direction F and the focus is adjusted. 26 (FIG. 11) is bonded using an ultraviolet curable adhesive as described below.

  Specifically, as shown in FIG. 11 above, two guide pins 46 that are horizontally provided on the upper protrusion 45e on the surface 45a side of the second frame plate 45 are provided at two locations in the spacer plate 24. The pin hole 24b of the second frame plate 45 is inserted into the pin hole 24b of the second frame bracket 45 with the ultraviolet curable adhesive filled therein, and the lower guide piece 27h of the second frame plate 45 is drilled into the lower protrusion 45h. The liquid crystal panel 34R is inserted in the focus direction F integrally with the first and second frame plates 42 and 45 by inserting the pin holes 45i (FIG. 10) in the two positions provided with ultraviolet curable adhesive. After moving and adjusting the focus on the liquid crystal panel 34R, the guide pins 46 inserted into the pin holes 24b and 45i are irradiated with ultraviolet rays toward the two upper and lower pin holes 24b and 45i. , 27 are bonded, so that the second frame First to 45 is attached to the upper and lower surface of the second polarization beam splitter 12 (FIG. 3), it is adhesively fixed to the second mounting bracket 23 and 26.

  Thereafter, although the first and second frame plates 42 and 45 overlap each other but are not yet bonded to each other, the adjustment jig 60 resists the heat sink 32 against the spring force of the plate spring 47. The liquid crystal panel 34R moves in the direction of alignment adjustment (registration adjustment) integrally with the first frame plate 42 by moving in the arrow X direction, arrow Y direction, and arrow R direction with the upper and lower hands 61 provided on the After the alignment adjustment (registration adjustment) to the liquid crystal panel 34R is completed, the first frame plate 42 and the second frame plate 45 are bonded as described below using an ultraviolet curable adhesive.

  Specifically, after the alignment adjustment (registration adjustment) for the liquid crystal panel 34R is completed, as shown in FIG. 9, the adhesive filling hole formed in the upper protruding piece 45e of the second frame plate 45 is used. The round hole 45f was filled with an ultraviolet curable adhesive, and ultraviolet rays were irradiated toward the round hole 45f to project the upper projecting piece 42e at a slight height on the surface 42a side of the first frame plate 42. The adhesive pedestal 42f is bonded, and the two round holes 42j drilled for filling the adhesive in the left and right lower protrusions 42h of the first frame plate 42 are filled with an ultraviolet curable adhesive. The two bases 45j for adhesive that are projected at a slight height on the lower protrusion 45h on the back surface 45b side of the second frame plate 45 are bonded by irradiating ultraviolet rays toward the two round holes 42j. Thus, the first frame plate 42 is bonded and fixed to the second frame plate 45. At this time, when the ultraviolet curable adhesive filled in the round hole 45f formed in the upper projecting piece 45e of the second frame plate 45 is cured, ultraviolet rays are irradiated from the U-shaped cutout 24c side of the spacer plate 24. On the other hand, when the ultraviolet curable adhesive filled in the two round holes 42j drilled in the left and right lower projecting pieces 42h of the first frame plate 42 is cured, the ultraviolet rays are applied to the back surface of the first frame plate 42. Irradiate from the side.

  Thereafter, the upper and lower hands 61 provided on the adjustment jig 60 are separated from the heat sink 32 and the leaf spring 47 is removed, so that the reflection-type spatial light for R is enlarged as shown in FIG. The modulation element unit 30R is fixed to the first and second mounting brackets 23 and 26 mounted on the upper and lower surfaces of the second polarizing beam splitter 12 (FIG. 3) in a state of focus adjustment and alignment adjustment. The attachment of the reflective spatial light modulation element unit 30R to the second polarization beam splitter 12 (FIG. 3) is completed.

  When the liquid crystal panel sub-assembly 31R and the second frame plate 45 are temporarily fixed with rubber bands, the R reflective spatial light modulation element unit 30R is attached to the second polarizing beam splitter 12 (FIG. 3). It is only necessary to cut the rubber band after the process is completed.

  In addition, the reflection type spatial light modulation element unit 30B for G and the reflection type spatial light modulation element unit 30B for B are also reflection type for R with respect to the second and third polarization beam splitters 12 and 13 (FIG. 1). What is necessary is just to attach similarly to the spatial light modulation element unit 30R.

  In the embodiment described in detail above, the case where the polarization beam splitter 12, for example, is applied as the optical block has been described. However, the technical idea of this embodiment is not limited to this, and the spatial light modulation of the reflection type or the transmission type is possible. The present invention can be applied to the case where the optical block having the color separation function and / or the color composition function is fixed using an ultraviolet curable adhesive with the element (liquid crystal panel) side adjusted in focus and alignment.

  Therefore, according to the spatial light modulation element mounting method and the spatial light modulation element mounting device according to the present invention, the color separation function and / or the color synthesis function can be performed with the spatial light modulation element (liquid crystal panel) side adjusted in focus and alignment. Since the ultraviolet curable adhesive is used to adhere to the optical block having the optical block, the spatial light modulation element (liquid crystal panel) side is fixed to the optical block by soldering as described in the first conventional example. However, the positional deviation (registration deviation) does not occur at the time of fixing, and the productivity is improved because the adhesion time is short.

  Further, as described in the conventional example 2, since the positional deviation (registration) does not occur as compared with the case where the spatial light modulation element (liquid crystal panel) side is detachably fixed to the optical block, the quality and reliability are improved. Can contribute.

1 is a principle diagram of a projection display device to which a spatial light modulation element mounting method and a spatial light modulation element mounting device according to the present invention are applied. FIG. 2 is an overall perspective view showing the color separation and color synthesis optical system shown in FIG. 1. FIG. 3 is an exploded perspective view showing the R reflective spatial light modulation element unit shown in FIG. 2 and first and second mounting brackets fixed to a second polarization beam splitter in an exploded manner. FIG. 4 is a perspective view showing a state in which an R reflective liquid crystal panel is fixed to a heat sink in the R reflective spatial light modulation element unit shown in FIG. 3. It is the perspective view shown in order to demonstrate positioning of a heat sink and an aperture mask board when lid-covering an aperture mask board on the heat sink which fixed the reflection type liquid crystal panel for R. It is the perspective view which showed the state which covered the aperture mask board on the heat sink which fixed the reflection type liquid crystal panel for R. It is the perspective view which showed the state which fitted the wave plate support frame plate which fixed the quarter wave plate along the inner periphery of the three guide plates fixed to the surface of the aperture mask plate by the swivel | rotation so that rotation was possible. is there. The first frame plate is superimposed on three guide plates fixed by caulking on the surface of the aperture mask plate, and the first frame plate is replaced with three guide plates, a wave plate supporting frame plate, and an aperture by three screws. It is the perspective view which showed the state which screwed on the heat sink through the mask board, and assembled the liquid crystal panel subassembly. When the second frame plate is overlaid on the first frame plate in the liquid crystal panel sub-assembly, a total of three pedestal portions are projected at a slight height on the front surface of the first frame plate and the back surface of the second frame plate. FIG. 3 is a perspective view showing the relationship between a total of three holes for filling the adhesive formed in the first and second frame plates. It is the perspective view which showed the state which overlapped the 2nd frame board on the 1st frame board in a liquid crystal panel subassembly, and comprised the reflection type spatial light modulation element unit for R. First and second mounting brackets in which the liquid crystal panel subassembly for R and the second frame plate are temporarily fixed by a leaf spring, and the reflective spatial light modulation element unit is bonded to the upper and lower surfaces of the second polarizing beam splitter. It is the perspective view which showed the state temporarily attached to. FIG. 5 is a perspective view showing a state in which a reflective spatial light modulation element unit is focus-adjusted and aligned by an adjustment jig in a state where an R liquid crystal panel subassembly and a second frame plate are temporarily fixed by a leaf spring. . The perspective view which showed the state after adhere | attaching the reflective spatial light modulation element unit for R on the 1st, 2nd mounting bracket which adhere | attached the upper surface and lower surface of the 2nd polarizing beam splitter using an ultraviolet curable adhesive. is there. It is the disassembled perspective view which showed the attachment apparatus of the solid-state image sensor in the prior art example 1. In the projection display apparatus in the prior art example 2, it is the disassembled disassembled perspective view which showed the structure of the liquid crystal panel unit.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Projection display apparatus, 5 ... Light source part,
10 Color separation and color synthesis optical system,
DESCRIPTION OF SYMBOLS 11-14 ... Optical block (1st-4th polarizing beam splitter), 15 ... Optical base, 23 ... 1st mounting bracket, 24 ... Spacer plate, 24b ... Pin hole, 25 ... Screw, 26 ... 2nd mounting bracket, 27 ... Guide pins,
30R, 30G, 30B ... RGB reflection type spatial light modulation element unit,
31R ... Liquid crystal panel sub-assembly,
32 ... heat sink, 32a ... front surface, 32b ... back surface, 32c ... rectangular hole,
33R ... Flexible printed circuit board for R,
34R, 34G, 34B... RGB reflective spatial light modulator (reflective liquid crystal panel),
35 ... Aperture mask plate, 35a ... Front surface, 35b ... Back surface, 35c ... Rectangular hole,
36-38 ... guide plate,
39: 1/4 wavelength plate,
40 ... Wave plate support frame plate, 40a ... Front surface, 40b ... Back surface, 40c ... Stepped rectangular hole,
41 ... packing material,
42 ... 1st frame board, 42a ... Front surface, 42b ... Back surface, 42c ... Rectangular hole,
42f: base for adhesive, 42j: round hole for filling adhesive,
43 ... Screw,
45 ... second frame plate, 45a ... front surface, 45b ... back surface, 45c ... rectangular hole,
45f ... round hole for filling adhesive, 45i ... pin hole, 45j ... pedestal for adhesive,
46 ... guide pins, 47 ... temporary fixing members (leaf springs),
50 ... Projection lens,
60 ... adjustment jig, 61 ... hand.

Claims (3)

In the spatial light modulation element mounting method for fixing the spatial light modulation element side to the optical block having the color separation function and / or the color synthesis function in a position-adjusted state,
Bonding the mounting bracket to the optical block using an adhesive;
Pre-assembling the spatial light modulator side on the back surface of the first frame plate;
A step of temporarily fixing the first and second frame plates by superimposing the back surface of the second frame plate on the surface of the first frame plate assembled on the spatial light modulation element side;
Bonding the second frame plate to the mounting bracket using an adhesive in a state where the spatial light modulation element is moved in a focus direction integrally with the first and second frame plates and the focus is adjusted;
Bonding the first frame plate and the second frame plate using an adhesive in a state in which the spatial light modulation element is moved in the alignment adjustment direction integrally with the first frame plate and the alignment adjustment is performed. A method for attaching a spatial light modulation element, comprising: A spatial light modulation element mounting apparatus for mounting a spatial light modulation element to which a flexible substrate is connected to an optical block,
A space including a first frame plate whose outer shape is a rectangular shape, wherein the spatial light modulator is disposed on one surface side of the first frame plate so that the flexible substrate extends from one side of the outer shape. A light modulation element assembly;
A mounting bracket secured to the optical block;
A second frame plate having one surface overlapped and fixed to a surface opposite to the one surface side of the first frame plate, and the other surface side fixed to the mounting bracket;
The first frame plate is
A first pedestal portion formed to protrude toward the second frame plate on the one side, and a first through hole formed on the side opposite to the one side;
The second frame plate is
A second through hole formed at a position corresponding to the first pedestal portion in the first frame plate and a position corresponding to the first through hole in the first frame plate on the first frame plate. A second pedestal formed to project toward the
The spatial light modulation element assembly can irradiate light to the second through-hole from the optical block side to the optical block, and the first penetration from the side opposite to the optical block. It is attached so that light can be irradiated to the hole,
Spatial light comprising an ultraviolet curable adhesive that is filled and cured so as to fix the first frame and the second frame in the first through hole and the second through hole. Modulating element mounting device. And Fuokasu the mounting bracket for adjusting the guide pin attached to one of the second frame plate, pin hole for inserting the guide pin is drilled in the other with respect to the spatial light modulator, spatial light modulator mounting apparatus according to claim 2, characterized in that it has a.

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