JP2003233125A - Projection type display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent misregistration. <P>SOLUTION: A projection type display device comprises driving means 30 and 40 for displacing the fitting positions of two projection display elements 19R and 19B except one reference projection display element 19G in an X-axial and/or a Y-axial direction, an adjustment pattern signal generator 52 which applies pattern signals for adjustment of respective colors to the projection display elements of respective colors in order while varying the signals by the colors in the same pattern along the X axis and Y axis, a terminal T1 for inputting the output of a photosensor 55 installed in front of a screen 23 before the fitting positions of the remaining two projection display elements are adjusted, and detecting means 56 and 57 which detect output values when the photosensor receives pattern images for adjustment of the respective colors corresponding to the pattern signals for adjustment of the respective colors applied in order to the projection display elements of the respective colors and respective outputs of the photosensor are inputted through the terminal. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a projection type display device equipped with projection display elements of respective colors corresponding to RGB three primary colors, and one projection type display device as a reference and the remaining two projection type display devices. The present invention relates to a projection type display device that can prevent misregistration by aligning the display device.

[0002]

2. Description of the Related Art Recently, as the diversification of image information and the improvement in image quality have progressed, high-quality image data represented by the high-definition broadcasting standard and the SVGA standard of computer graphics has increased. Projection display devices are widely used for enlarged display.

Among the projection type display devices of this type, a three-plate type projection type display device optically outputs each image displayed on three projection display elements prepared for each color corresponding to RGB three primary colors. By combining them, one color image is enlarged and displayed on the screen through the projection lens. Here, when the images displayed on the three projection display elements are optically synthesized, if the positions of the projection display elements with respect to the optical image synthesizing means shift, they are enlarged and displayed on the screen. The registration of the color image is deviated and the image quality is impaired.

Therefore, in order to avoid registration deviation of a color image in a three-plate type projection display device,
Japanese Laid-Open Patent Publication No. 9-15536 discloses a device for assembling a display element for a projector.

FIG. 22 is a schematic view for explaining a conventional device for assembling a display element for a projector, and FIG. 23 is a perspective view of the position adjusting means and the display element shown in FIG.

A conventional display device assembling apparatus 300 for a projector shown in FIG. 22 is disclosed in the above-mentioned Japanese Patent Laid-Open No. 9-1553.
It is disclosed in Japanese Patent No. 6 and will be described with reference to the same.

As shown in FIGS. 22 (a) to 22 (c), in a conventional projector display element assembling apparatus 300, a light source 301, a three-primary-color separation prism 303 fixed to a fixing bracket 302, and three-primary-color separation are provided. Display elements 304R, 304 for the three primary colors arranged facing the respective light entrance surfaces of the prism 303.
G, 304B and display elements 304R, 304 for three primary colors
Position adjusting means 305R, 305G, 305B for adjusting the position of each display element by attaching G, 304B respectively.
And a magnifying lens 306 arranged to face the light output surface of the three primary color separation prism 303, a reflection mirror 308 fixed to a fixing metal fitting 307, a small screen 311 fixed to the fixing metal fitting 310, a small screen 311 and a center. CCs attached at four points that are the vertices of squares whose positions match
It is composed of a D camera 312 and four monitors 313 that display an output pattern 313a captured by the CCD camera 312.

The assembling operation of the conventional projector display element assembling apparatus 300 configured as described above is performed by the light source 301.
The light 301a from the above is incident on the three-primary-color separation prism 303, is divided into the three-primary-color light by the three-primary-color separation prism 303, and the divided respective lights are respectively associated with the display elements 30.
It is incident on 4R, 304G, and 304B.

The display elements 304R, 304G, 3
Each light reflected by 04B is again divided into three primary color separation prisms 30.
The output pattern 309 formed by the combined light is made to project on the small screen 311 via the magnifying lens 306 and the reflecting mirror 308, and the image is picked up by the CCD camera 312. A partial output pattern 313a is displayed on the monitor 313.

Here, the display elements 304R, 304G, 3
Each light reflected by 04B is again divided into three primary color separation prisms 30.
A small screen 3 when the light is incident on the 3 and is optically combined.
Position adjustment means 305R, 305 while watching the output pattern 313a on the monitor 313 so that the registration deviation of the display image enlarged and projected on the display unit 11 does not occur.
G, 305B for each display element 304R, 304G, 304
The position of B is adjusted, and each display element 304R, 304G, 304B is fixed to the three primary color separation prism 303 at this position by a fixing means (not shown).

The above-mentioned position adjusting means 305R (305
G, 305B) is the display element 30 as shown in FIG.
4R (304G, 304B) to X, Y, Z, θ, Rx,
It is configured to perform position adjustment on the six axes of Ry.

[0012]

By the way, in the above-mentioned conventional display device assembling apparatus 300 for a projector, as described above, the position adjusting means 305R, 305G, 305.
By adjusting the positions of the display elements 304R, 304G, and 304B with B, respectively, although the registration deviation of the display image enlarged and projected on the small screen 311 does not occur, four CCD cameras 312 are installed on the small screen 311. In addition, since the monitor 313 is connected to each CCD camera 312, the assembling apparatus 300 is large.

The conventional display device assembling apparatus 300 for a projector includes display devices 304R and 30R before shipment from the factory.
Although the positions of 4G and 304B are adjusted and the display elements 304R, 304G, and 304B are fixed to the three primary color separation prisms 303 after the adjustment, the respective display elements 304R and 304G are fixed.
In some cases, the R, 304G, and 304B are not fixed to the three primary color separation prism 303. In this case, when the mounting positions of the display elements 304R, 304G, and 304B are deviated due to vibration during transportation, etc. It is difficult to adjust the position of each display element 304R, 304G, 304B by applying the above because it is necessary to prepare four CCD cameras 312 and four monitors 313.

Further, considering high-definition image display, each display element 304 is affected by the temperature of the light source 301 and the like.
The registration deviation of R, 304G, 304B cannot be ignored.

Further, as is apparent from FIG. 23, the position adjusting means 305R (305G, 305B) is the display element 3
04R (304G, 304B) to X, Y, Z, θ, R
When performing position adjustment on the 6 axes of x and Ry, since the stage in each direction is manually adjusted by each micrometer, there are problems such as poor efficiency during adjustment work.

[0016]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and a first aspect of the present invention is to separate the light source light from a reading light source into R, G, and B three-color separation means. The respective color lights obtained by decomposing into the primary colors are made incident on the projection display elements of the respective colors, and the respective images displayed on the projection display elements of the respective colors are optically modulated by the R, G, and B color lights, respectively. In the projection type display device, which obtains image light and then optically combines the image lights of the respective colors by the three-color combining means to obtain one color image light on the screen by the projection lens, becomes a reference 1 Except for one projection display element, the mounting positions of the remaining two projection display elements are displaced in the X-axis direction and / or the Y-axis direction, and the remaining two projection display elements are respectively replaced by the one projection display element. Alignment for aligning with the display element A displacement means for adjusting, and an adjustment pattern signal generator for sequentially applying the adjustment pattern signal for each color to the projection display element for each color while changing the same pattern for each color in the X-axis direction and the Y-axis direction, A terminal for inputting the output of a photosensor installed in front of the screen when adjusting the mounting positions of the remaining two projection display elements, and an adjustment pattern signal for each color sequentially applied to the projection display elements for each color. The adjustment pattern image light of each color corresponding to is received sequentially by the photo sensor, and,
A projection type display device comprising: a detection unit that detects each output value when each output from the photo sensor is input through the terminal.

According to a second aspect of the present invention, each color light obtained by separating the light source light from the reading light source into three primary colors of R, G and B by the three color separation means is provided to each projection display element of each color. After being made incident, each image displayed on the projection display element of each color is optically modulated by each color light of R, G, B to obtain image light of each color, and then the image light of each color is combined by the three-color combining means. In a projection type display device for projecting one color image light obtained by optically combining on a screen by a projection lens, mounting the remaining two projection display elements excluding one reference projection display element First positioning displacement means for displacing the position in the X-axis direction and / or the Y-axis direction to align each of the remaining two projection display elements with the one projection display element. , Adjust the pattern signal for each color for each color. An adjustment pattern signal generator for sequentially applying the same pattern to the projection display elements of the respective colors, and a photo sensor installed in front of the screen when adjusting the mounting positions of the remaining two projection display elements. A first terminal for inputting an output of the photosensor, a second terminal for outputting a drive signal to a second alignment displacement means for displacing the photosensor in the X-axis direction and / or the Y-axis direction of the screen, The photosensor sequentially receives the adjustment pattern image light of each color corresponding to the adjustment pattern signal of each color sequentially applied to the projection display element of each color, and outputs each output from the photosensor to the first terminal. The projection type display device is provided with a detection means for detecting each output value when inputting through.

A third aspect of the present invention is the projection type display device according to the first or second aspect of the present invention, wherein the one projection display element projects an adjustment pattern image light of color light corresponding thereto. When received by the photosensor, a boundary portion is formed between a projected portion that projects the colored light and a non-projected portion that does not shine light in the adjustment pattern of the adjustment pattern image light of the colored light, and the boundary portion is formed. Sets the light-receiving surface of the photosensor in a state that the light-receiving surface is divided into two parts in the X-axis direction and the Y-axis direction, respectively, and the remaining two projection display elements emit the colored light corresponding to the one projection display element. The adjustment pattern image light of the same pattern, which is different in color from the adjustment pattern image light, is projected, and the boundary portion in each adjustment pattern by the adjustment pattern image light of each color is the one projection. It is characterized in that the remaining two projection display elements are respectively displaced in the X-axis direction and / or the Y-axis direction based on the respective output values from the photosensor so as to coincide with the case of projection by the display element. It is a projection display device.

According to a fourth aspect of the invention, each color light obtained by separating the light source light from the light source for reading into three primary colors of R, G, and B by the three-color separation means is provided to each projection display element of each color. After being made incident, each image displayed on the projection display element of each color is optically modulated by each color light of R, G, B to obtain image light of each color, and then the image light of each color is combined by the three-color combining means. In a projection type display device for projecting one color image light obtained by optically combining on a screen by a projection lens, mounting the remaining two projection display elements excluding one reference projection display element Positioning displacement means for displacing the position in the X-axis direction and / or the Y-axis direction to position each of the remaining two projection display elements with respect to the one projection display element; The remaining two projection displays Temperature sensors respectively installed in the vicinity of the child, detection means for detecting the output value of the temperature sensor, the temperature in the vicinity of the temperature sensor is changed, the remaining value corresponding to each output value from the temperature sensor And a memory that stores a displacement direction and a displacement amount for displacing the two projection display elements in the X-axis direction and / or the Y-axis direction.

According to a fifth aspect of the invention, each color light obtained by separating the light source light from the reading light source into three primary colors of R, G, and B by the three-color separation means is provided to each projection display element of each color. After being made incident, each image displayed on the projection display element of each color is optically modulated by each color light of R, G, B to obtain image light of each color, and then the image light of each color is combined by the three-color combining means. In a projection type display device for projecting one color image light obtained by optically combining on a screen by a projection lens, mounting the remaining two projection display elements excluding one reference projection display element The position is automatically displaced in the X-axis direction and / or the Y-axis direction, or is automatically rotated in the XY-axis plane, and each of the remaining two projection display elements is used for the one projection. Alignment to align with the display element A projection type display apparatus comprising the use displacement means.

A sixth aspect of the present invention is the projection display apparatus according to the fifth aspect, wherein the displacement means for alignment is arranged so that the projection display element to be aligned is an X-axis moving table or a Y-axis moving table. A fixed member that displaceably supports both moving bases while being fixed to one of the moving bases;
It is characterized by comprising first driving means for automatically displacing the axis movement base in the X-axis direction and second driving means for automatically displacing the Y-axis movement base in the Y-axis direction. It is a projection type display device.

A seventh aspect of the present invention is the projection type display device according to the fifth aspect, wherein the positioning displacement means is capable of displacing the movable table to which the projection display element to be aligned is fixed. The fixed member that is supported, the spring member that is mounted between the movable base and the fixed member and is elastically displaced in the X-axis direction and / or the Y-axis direction, and the movable base in the X-axis direction. Press the X-axis to move the moving table with the spring member.
First pressing drive means for automatically displacing in the axial direction, and second pressing means for automatically displacing the moving base in the Y-axis direction by pressing the moving base in the Y-axis direction by the spring member.
It is a projection type display device characterized by comprising a pressing drive means.

The eighth aspect of the present invention is to separate the light source light from the light source for reading into three primary colors of R, G, and B by the three-color separating means, and obtain each color light on the projection display element of each color. After being made incident, each image displayed on the projection display element of each color is optically modulated by each color light of R, G, B to obtain image light of each color, and then the image light of each color is combined by the three-color combining means. In a projection type display device for projecting one color image light obtained by optically combining on a screen by a projection lens, mounting the remaining two projection display elements excluding one reference projection display element The position is automatically displaced in any of the X-axis direction, the Y-axis direction, the Z-axis direction, the θx direction, the θy direction, and the θz direction, and the remaining two projection display elements are respectively projected to the one projection. For aligning with the display element for Further comprising a displacement means for so a projection type display apparatus according to claim.

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a projection type display device according to the present invention will be described below with reference to FIGS. 1 to 21 <first embodiment>, <second embodiment>, <third embodiment. > And <application example> in order.

FIG. 1 is a block diagram showing an optical configuration of a projection type display device according to the present invention, and FIGS. 2A and 2B are projection display elements (reflection type liquid crystal light valve) shown in FIG. ) X
FIG. 3 is a perspective view for explaining an X-axis driving unit and a Y-axis driving unit that are automatically displaced in the axial direction and / or the Y-axis direction, and FIG. 3 is each polarization beam splitter for R, G, and B shown in FIG. To
FIG. 7 is a perspective view showing a state in which the cross dichroic prism for three-color combination is integrally attached.

As shown in FIG. 1, the projection type display device 10 according to the present invention has an optical system in common with the first to third embodiments described later.

In the projection display device 10 described above, the housing 1
A light source 12 for reading is provided in the light source 1, and R (red) light, G (green) light, and B emitted from the light source 12 are provided.
The light source light L including (blue) light is reflected by the cold mirror 13 in a direction perpendicular to the incident direction and is incident on the cross dichroic mirror 14 arranged in an X shape.

The cross dichroic mirror 14 is
A dichroic mirror 14b having B light reflection characteristics,
Dichroic mirror 1 having R and G light reflection characteristics
It is formed by crossing 4 rg in an X shape.

Then, the cross dichroic mirror 14
Source light L to B by the dichroic mirror 14b of
The light is separated, and this B light is dichroic mirror 14b.
Is reflected in the direction perpendicular to the incident direction and is incident on the bending mirror 15, and the B light is reflected by the bending mirror 15 in the direction perpendicular to the incident direction and is incident on the polarization beam splitter 18B described later. .

On the other hand, the dichroic mirror 14rg of the cross dichroic mirror 14 causes the light sources L to R to pass.
The R light and the G light are separated, and the R light and the G light are reflected by the dichroic mirror 14rg in a direction perpendicular to the incident direction and are incident on the bending mirror 16, and the R light and the G light are further reflected by the bending mirror 16. The light is reflected in a direction perpendicular to the incident direction and is incident on the dichroic mirror 17. Then, by the dichroic mirror 17, R
The separated R light is separated into light and G light, and the separated R light goes straight on and is incident on a polarization beam splitter 18R described later. On the other hand, the separated G light is reflected in a direction perpendicular to the incident direction and described later. It is incident on the polarization beam splitter 18G.

From the above, the cross dichroic mirror 14
With the dichroic mirror 17, the light source light L is changed to R, G,
A three-color separating unit that separates the three primary colors of B is configured.

Next, the polarization beam splitters 18R, 18G, and 18B for the respective colors corresponding to the three primary colors of R, G, and B have cross dichroic prisms 21 for three-color synthesis described later.
Centered on the cross dichroic prism 21 3
It is arranged to face the surface.

Further, the polarization beam splitter 1 with the projection display elements 19R, 19G and 19B for the respective colors corresponding to the three primary colors of R, G and B attached to the respective bases 20.
It is arranged so as to face 8R, 18G, and 18B. Here, the projection display elements 19R, 19G, 19B for each color are used.
As a reflective liquid crystal light valve is used as
Hereinafter, reflective liquid crystal light valves 19R, 19G, 19B
Will be described.

These reflective liquid crystal light valves 19R,
Of the 19G and 19B, for example, the G reflection type liquid crystal light valve 19G is used as a reference for the mounting position when adjusting the registration with respect to the R and B reflection type liquid crystal light valves 19R and 19B. Fixed firmly on top.

On the other hand, the reflection type liquid crystal light valves 19R and 19B for R and B which are to be aligned are the light valve X-axis drive units 30 and 3 provided on the bases 20 and 20, respectively.
0 and the light valve Y-axis drive units 40, 40 are displaceable in the X-axis direction and / or the Y-axis direction, and these structures constitute a positioning displacement means for positioning.

Explaining the reason for this, when a color image is projected on the screen 23 described later, three colors of R, G, B are displayed.
Among the primary colors, G light has the greatest effect on resolution. Also, R
The light next affects the resolution, and the B light has a relatively small influence on the resolution. Therefore, since the registration adjustment is a relative displacement adjustment, the G reflection type liquid crystal light valve 19G that most affects the resolution is fixed, and the R and B reflection type liquid crystal light valves 19R and 19B are fixed with reference to this. The registration adjustment may be performed by displacing.

The light valve X-axis drive section 30 and the light valve Y-axis drive section 4 which serve as the above-mentioned displacement means for positioning.
As shown in FIG. 2A and FIG. 2B in an enlarged scale, the number 0 indicates that the X-axis moving table 31 and the Y-axis moving table 41 are stacked in two stages on the base table 20 serving as a fixed member, which will be described later. Like the first, second
Both moving bases 31 and 41 are automatically displaceable in the X-axis direction and the Y-axis direction by the driving force of the stepping motors 33 and 43. Further, an R reflective liquid crystal light valve 19R or a B reflective liquid crystal light valve 19B is fixed on the Y-axis moving base 41 toward the polarization beam splitter 18R side or the polarization beam splitter 18B side. At this time, each of the rectangular tables 20, 31, 41 is formed to have substantially the same vertical and horizontal dimensions.

The supporting frame 26R or the supporting frame 26B attached to the lower surface of the base 20 is the polarizing beam splitter 18 for R or the polarizing beam splitter 18 for B.
It is attached to the B side and will be described later.

Here, the X-axis moving table 31 of the light valve X-axis driving section 30 is attached to the base table 20 so as to be displaceable in the X-axis direction, and the Y-axis moving table 41 of the light valve Y-axis driving section 40. Is mounted on the X-axis moving base 31 so as to be displaceable in the Y-axis direction, and further, the reflection type liquid crystal light valve 19R for R or the reflection type liquid crystal light valve 19B for B is fixed on the Y-axis movement base 41. There is.

The light valve X-axis drive unit 3 described above is also used.
0, the first rack 32 is attached to the front side surface 20a of the base 20.
Is attached horizontally along the X-axis, and the first stepping motor 33 is attached to the front side surface 31a of the X-axis moving table 31 by the X-axis.
The first worm 34 is mounted horizontally along the shaft, and further, the first worm 34 is fixed to the shaft of the first stepping motor 33, and the first worm 34 meshes with the first rack 32.
As a result, when the first stepping motor 33 is normally or reversely rotated, the X-axis moving base 31 can be automatically displaced in the X-axis direction by the engagement of the first rack 32 and the first worm 34.

A first light shielding plate 35 is attached to the front side surface 20a of the base 20, and the first light shielding plate 35 is attached to the first light shielding plate 35.
The first photodetector 36 is attached to the front side surface 31a of the X-axis moving base 31 so as to face the. Then, the first light shielding plate 3
A point where 5 interrupts the first photodetector 36 indicates a reference position (X0) on the X axis, and the X axis moving table 31 causes the reference position (X0) on the X axis by a pulse for driving the first stepping motor 33. X
It is displaceable in the + direction or the-direction around 0).

Nothing is attached to the front side surface 41a of the Y-axis moving base 41.

On the other hand, the light valve Y-axis drive unit 4 described above
0, the second rack 4 is mounted on the right side surface 31b of the X-axis moving base 31.
2 is attached substantially horizontally along the Y-axis, and the second stepping motor 43 is attached to the right side surface 41b of the Y-axis moving base 41.
Is attached substantially horizontally along the Y-axis, and the second worm 44 is fixed to the shaft of the second stepping motor 43, and the second worm 44 meshes with the second rack 42. As a result, when the second stepping motor 43 is normally or reversely rotated, the second rack 42 and the second worm 44 are
The Y-axis moving base 41 can be automatically displaced in the Y-axis direction by meshing with. A second light blocking plate 45 is attached to the right side surface 31b of the X-axis moving base 31 of the light valve Y-axis driving unit 40, and the right side surface of the Y-axis moving base 41 faces the second light blocking plate 45. The second photodetector 46 is attached to 41b. The point where the second light shield plate 45 shields the second photodetector 46 indicates the reference position (Y0) on the Y axis, and the Y axis moving base 41 is moved by the pulse when driving the second stepping motor 43. It is displaceable in the + direction or the-direction around the reference position (Y0) on the Y axis.

Therefore, as shown in FIG. 2B, when the R reflective liquid crystal light valve 19R for R or the reflective liquid crystal light valve 19B for B is vertically installed, it is displaceably provided on the base 20. R by X-axis and Y-axis moving bases 31 and 41
The reflective liquid crystal light valve 19R for B or the reflective liquid crystal light valve 19B for B is positionally adjustable in the X-axis direction and / or the Y-axis direction.

Here, although the R reflective liquid crystal light valve 19R or the B reflective liquid crystal light valve 19B is fixed on the Y-axis moving base 41, the Y-axis moving base is mounted on the base base 20. 41 is attached, the X-axis moving table 31 is attached on the Y-axis moving table 41, and further, the reflective liquid crystal light valve 19R for R or the reflective liquid crystal light valve 19B for B is fixed on the X-axis moving table 31. You may attach it.

The reflection type liquid crystal light valve 1 for G is also used.
9G may also be attached to the light valve X-axis drive unit 30 and the light valve Y-axis drive unit 40 that are provided in a two-tiered manner on the base 20, but in this case, the reflection type liquid crystal light valve 19G for G is used as a light source. The valve X-axis drive unit 30 and the light valve Y-axis drive unit 40 may be fixed at respective reference positions (X0, Y0).

Returning to FIG. 1, thereafter, the R light incident on the polarization beam splitters 18R, 18G and 18B,
The G light and B light are polarized beam splitters 18R, 18G,
The S-polarized light reflected by the polarization splitting function of 18B and the P-polarized light respectively transmitted are polarized and split.
The S-polarized lights of the R light, the G light, and the B light which are polarized and separated are respectively reflected liquid crystal light valves 19R, 19G for the respective colors.
The P-polarized lights of the R light, the G light, and the B light that are incident on 19B and are polarized and separated are discarded.

Further, the reflection type liquid crystal light valves 19B, 1
In 9R and 19G, each image displayed on the
R, G, and B light is modulated by S-polarized light of light, G light, and B light.
Each image light of light is obtained, and the image light of each color obtained here is again incident on the polarization beam splitters 18R, 18G, and 18B and proceeds straight as it is to the cross dichroic prism 21 for three-color combining. .

The cross dichroic prism 21 for three-color composition described above is installed on the optical axis K of the projection lens 22. This cross dichroic prism 21
An R-light reflection dichroic film 21r and a B-light reflection dichroic film 21b, which are composed of four right-angled isosceles triangular prisms having the same refractive index and are formed of a dielectric multilayer film on a predetermined slope, cross in an X shape. Is formed.
Then, the image light of the R light and the B light incident on the cross dichroic prism 21 is dichroic films 21r, 2r.
On the other hand, the image light of G light which is reflected by 1b in the direction perpendicular to the incident direction and is incident on the cross dichroic prism 21 is dichroic films 21r and 21b.
By passing through and going straight, the image lights of the respective colors are optically combined by the cross dichroic prism 21 to become color image lights, and the color image lights are enlarged and projected on the screen 23 by the projection lens 22. ing.

The screen 23 is the projection type display device 1.
Since it is installed away from 0, the projection display device 1
It is treated as a separate entity from 0.

Then, as shown in FIG. 3, when assembling the projection type display device 10, the polarization beam splitters 18R, 18G and 18B for the respective colors and the respective facing surfaces of the cross dichroic prism 21 for the three color combination are formed. Connection member 2 between
By interposing 4R, 24G, and 24B, the polarization beam splitters 18R, 18G, and 18B for each color are integrally attached to the cross dichroic prism 21 for three-color synthesis so that their optical axes coincide with each other.

In addition, the polarization beam splitter 18 for each color
A reflective liquid crystal light valve 19 is provided on each of R, 18G and 18B.
Bracket 25R, on the side facing R, 19G, 19B,
25G and 25B are fixed by using an adhesive material. At this time, the first bracket 25G for G color is for connecting a support frame (26G) (not shown) supporting the base 20 to which the reflective liquid crystal light valve 19G for G is fixed. In addition, brackets 25R and 25B for R and B
Is a reflection type liquid crystal light valve 19R, 1 for R and B.
Support frames 26R, 2 supporting bases 20, 20 on which 9B is attached so as to be displaceable in the X-axis direction and / or Y-axis direction.
It is for connecting 6B (FIG. 2).

<First Embodiment> FIG. 4 is a block diagram showing a signal processing unit of the first embodiment in a projection type display apparatus according to the present invention, and FIGS. 5A to 5C show the front center of the screen. FIG. 6A to FIG. 6C are diagrams showing a state in which a photosensor installed in a part detects an X-axis direction adjustment pattern, and FIGS. 6A to 6C are photosensors installed in a front center part of the screen.
It is a figure showing the state where an axial direction adjustment pattern is detected.

The signal processor 5 of the first embodiment shown in FIG.
In 0A, as described above, the G reflection type liquid crystal light valve (19G) that serves as a reference when adjusting the mounting position is not provided with the light valve X-axis drive unit 30 and the light valve Y-axis drive unit 40. On the other hand, R and B reflective liquid crystal light valves 19R and 19B for adjusting the mounting position with respect to the G reflective liquid crystal light valve (19G).
Although the light valve X-axis drive unit 30 and the light valve Y-axis drive unit 40 are provided in FIG. 1, only one deflection beam splitter 18R is shown here for convenience of illustration.
(18G), 18B and reflective liquid crystal light valve 19
Displayed as R, (19G), and 19B.

The signal processing section 50A of the first embodiment described above.
Then, the microcomputer 51 for controlling the entire projection type display device 10 (FIG. 1) and the adjustment pattern signal generator 52A are internally provided.
And for the R, (G
Reflective liquid crystal light valves 19R, (19)
G) and 19B, the X-axis direction adjustment pattern signal 52x and Y
A video circuit 52 for applying an axial direction adjustment pattern signal 52y and a video signal 52e at respective timings, and a light valve to which R and B reflection type liquid crystal light valves 19R and 19B are attached in response to a command from the microcomputer 51. A light valve X-axis drive circuit 53 and a light valve Y-axis drive circuit 54 which supply an X-axis drive signal 53a and a Y-axis drive signal 54a to the X-axis drive unit 30 and the light valve Y-axis drive unit 40 at respective timings; Terminal B1 for inputting the analog photosensor signal 55a from the photosensor 55 installed in the front center portion of the screen 23 when adjusting the mounting positions of the reflection type liquid crystal light valves 19R and 19B for the B and B, and the input analog photo A photo sensor detection circuit 56 for detecting the sensor signal 55a, and a photo sensor detection circuit The detection signal 56a is composed of an A / D converter 57 for converting A / D values of the digital photosensor signal 57a to the microcomputer 51 from 6.

Here, the adjustment pattern signal generator 52A provided in the video circuit 52 is provided for each color to obtain the X-axis direction adjustment pattern image light shown in FIGS. 5A to 5C. X-axis direction adjustment pattern signal 52x (52xr,
52xg, 52xb) and Y shown in FIGS.
Y-axis direction adjustment pattern signal 52y (52yr, 5) of each color for obtaining the axial direction adjustment pattern image light for each color.
2yg, 52yb) are generated.

Further, the light valve X-axis drive section 30 and the light valve Y-axis drive section 40 have the first light blocking plate 35 and the first light detection plate as described above with reference to FIGS. 2 (a) and 2 (b). With the instrument 36, the reference position (X
0) indicating the X-axis reference position signal 30a and the second light shielding plate 4
5 and the second photodetector 46, the Y-axis reference position signal 40a indicating the reference position (Y0) of the Y-axis moving base 41 in the Y-axis direction is input to the microcomputer 51. And X
Preset a counter (not shown) provided in the microcomputer 51 to count the number of pulses of the first stepping motor 33 and the second stepping motor 43 at the timing when the axis reference position signal 30a and the Y axis reference position signal 40a are output. is doing. As a result, the X-axis moving base 31
Also, the position of the Y-axis moving base 41 and the value of the counter can hold a predetermined relationship.

In addition, when the mounting positions of the R and B reflection type liquid crystal light valves 19R and 19B are adjusted with respect to the reference G reflection type liquid crystal light valve (19G), and registration is performed, A photo sensor 55 is installed in the front center part of the screen 23. The photo sensor 55 includes a substantially central portion of the screen 23 in the X-axis direction,
The screen 23 is installed at a position where it intersects with a substantially central portion in the Y-axis direction.

The photosensor 55 described above is sensitive in the visible light range, but the photosensor 55 allows the reflection type liquid crystal light valves 19R, (19G), 19 to be reflected.
The position of the adjustment pattern image projected by B is known, and the R type and B type for the G reflection type liquid crystal light valve (19G) serving as a reference based on the position information from the adjustment pattern image. The mounting positions of the reflective liquid crystal light valves 19R and 19B are adjusted.

Next, the operation of the signal processing unit 50A of the first embodiment configured as described above will be described with reference to FIGS.

First, by operating the adjustment pattern signal generator 52A in the video circuit 52, the X-axis direction adjustment pattern signals 52xg for G and the G adjustment pattern signal 52A generated by the adjustment pattern signal generator 52A are generated. The Y-axis direction adjustment pattern signal 52yg is sequentially applied to the G reflective liquid crystal light valve (19G) serving as a reference. At this time, the adjustment order is determined by whether the X-axis direction adjustment pattern signal 52xg is applied first or the Y-axis direction adjustment pattern signal 52yg is applied first, but in the following, the X-axis direction is applied first. The case of adjustment will be described.

Here, when the light source light L is incident on the G polarization beam splitter (18G), the G light source light L is reflected by the G polarization beam splitter (18G), and the G reflection type liquid crystal light. It enters the bulb (19G). Thereafter, the G-use X-axis direction adjustment pattern signal 52xg applied to the G-use reflective liquid crystal light valve (19G) is optically modulated by the G-use light source light L, and the G-use X-axis direction adjustment pattern is used. The image light is returned to the G polarization beam splitter (18
It is incident on G), passes through the cross dichroic prism 21 for three-color synthesis, and is displayed on the screen 23 by the projection lens 22.

Then, as shown in FIGS. 5A to 5C, the X-axis direction adjustment pattern signal 52x for G is used.
The X-axis direction adjustment pattern by the X-axis direction adjustment pattern image light corresponding to g is projected on the projection portion on which the G light is projected within the rectangle on the left side along the X-axis direction and on the projection portion on the right side of this projection portion. On the other hand, by dividing into a non-projection part which does not receive light in order to increase contrast, a boundary part XK between the projection part and the non-projection part in the X-axis direction adjustment pattern is divided.
Are formed. As a result, the photosensor 55 installed in the front center portion of the screen 23 outputs a value obtained by detecting the G light from the projection portion, and outputs a value corresponding to black because light is not emitted at the non-projection portion. become.

Then, as the X-axis direction adjustment pattern signal 52xg for G, as shown in FIG. 5A, the light receiving surface of the photosensor 55 is entirely covered with the pattern of the non-projection portion where no light is applied. As shown in FIG. 5 (c), the pattern of the X-axis direction adjustment pattern signal 52xg for G is set so that the light-receiving surface of the photosensor 55 is entirely covered with the pattern of the projection portion on which the G light is applied. It is gradually changed (however, the state of FIG. 5C can be changed to the state of FIG. 5A). At this time, as shown in FIG. 5B, the light receiving surface of the photosensor 55 is roughly divided into two in the X-axis direction at the boundary portion XK, and the boundary portion XK is in the X-axis direction of the light receiving surface of the photosensor 55. When the pattern of the X-axis direction adjustment pattern signal 52xg for G is set in the state of reaching the center position, the output value of the photosensor 55 is the same as the output value in the state shown in FIG. It is an intermediate value with the output value in the state shown in (c). Incidentally, when the X-axis direction of the light receiving surface of the photosensor 55 is divided into two at the boundary portion XK, there is a case where the pixel arrangement in the X-axis direction of the reflective liquid crystal light valve for G (19G) does not completely divide into two. Therefore, in the following description, it will be described as approximately two minutes.

Next, the Y-axis direction adjustment pattern signal 52yg for G is applied to the reflection type liquid crystal light valve for G (19G). At this time, as shown in FIGS. 6A to 6C, the Y-axis direction adjustment pattern signal 52y for G described above.
The Y-axis direction adjustment pattern by the Y-axis direction adjustment pattern image light corresponding to g is a projection portion in which G light is projected in an upper rectangle along the Y-axis direction, and a projection portion below this projection portion. By dividing into a non-projection part that does not receive light to increase the contrast, a boundary part YK between the projection part and the non-projection part in the Y-axis direction adjustment pattern.
Are formed. Here, too, the photo sensor 55 installed in the front center part of the screen 23 is
The value obtained by detecting the light is output, and the light corresponding to the black color is output because the light is not applied to the non-projection portion.

Then, as the Y-axis direction adjustment pattern signal 52yg for G, as shown in FIG. 6 (a), the light receiving surface of the photosensor 55 is entirely covered with the pattern of the non-projection portion which is not exposed to light. As shown in FIG. 6C, the pattern of the Y-axis direction adjustment pattern signal 52yg for G is set so that the entire light-receiving surface of the photosensor 55 is covered with the pattern of the projection portion on which the G light hits. It is gradually changed (however, the state of FIG. 6C can be changed to the state of FIG. 6A). At this time, as shown in FIG. 6B, the light receiving surface of the photosensor 55 is divided into about two in the Y-axis direction at the above-described boundary portion YK so that the boundary portion YK is in the Y-axis direction of the light receiving surface of the photosensor 55. When the pattern of the Y-axis direction adjustment pattern signal 52yg for G is set in the state of reaching the center position, the output value of the photosensor 55 is the same as the output value in the state shown in FIG. It is an intermediate value with the output value in the state shown in (c). Incidentally, when the Y-axis direction of the light-receiving surface of the photosensor 55 is divided into two at the boundary portion YK, there is a case where the pixel arrangement in the Y-axis direction of the reflective liquid crystal light valve for G (19G) cannot completely divide into two. Therefore, in the following description, it will be described as approximately two minutes.

Next, the reflective liquid crystal light valve 19 for R is used.
In order to adjust the registration with respect to R, the R pattern having the same pattern and different color from the above-described G X-axis direction adjustment pattern signal 52xg and G Y-axis direction adjustment pattern signal 52yg is used. The X-axis direction adjustment pattern signal 52xr and the R Y-axis direction adjustment pattern signal 52yr are sequentially applied to the reflective liquid crystal light valve 19R for R, and the X-axis direction adjustment pattern for R is displayed on the screen 23. The image light and the Y-axis direction adjustment pattern image light for R are sequentially displayed.

That is, the reflection type liquid crystal light valve 19 for R is used.
When adjusting the mounting position of R in the X-axis direction, the pattern signal 52xr for adjusting the X-axis direction for R is not projected onto the light receiving surface of the photo sensor 55 as shown in FIG. From the state covered by the pattern of the part,
As shown in (c), the light-receiving surface of the photo sensor 55 is gradually changed so that the light-receiving surface is entirely covered with the pattern of the projected portion irradiated with R light (however, from the state of FIG. 5 (c) It is possible to change to the state of FIG. 5 (a)} and FIG.
The output value of the photo sensor 55 in the state shown in (a),
The output value of the photosensor 55 in the state shown in FIG. 5C is stored in the memory 51a in the microcomputer 51, and the intermediate value of both output values is calculated by the microcomputer 51. After that, the first stepping motor 3 of the light valve X-axis drive unit 30 is controlled so that the calculated intermediate value can be obtained from the photo sensor 55.
3 is driven to displace the X-axis moving base 31 in the X-axis direction, and the X-axis moving base 31 is stopped at the position where the output value of the photo sensor 55 matches the above-mentioned intermediate value.

Further, the reflection type liquid crystal light valve 19 for R is used.
When adjusting the mounting position of R in the Y-axis direction, the Y-axis direction adjustment pattern signal 52yr for R is not projected onto the light-receiving surface of the photosensor 55 as shown in FIG. 6A. From the state of being covered with the pattern of the part,
As shown in (c), the light receiving surface of the photo sensor 55 is gradually changed so that it is entirely covered by the pattern of the projection portion on which the R light is applied {however, from the state of FIG. 6 (c) It is possible to change to the state of FIG. 6 (a)} and FIG.
The output value of the photo sensor 55 in the state shown in (a),
The output value of the photosensor 55 in the state shown in FIG. 6C is stored in the memory 51a in the microcomputer 51a, and the intermediate value of both output values is calculated by the microcomputer 51. After this,
The second stepping motor 43 of the light valve Y-axis drive unit 40 is driven to displace the Y-axis moving base 41 in the Y-axis direction so that the calculated intermediate value can be obtained from the photo sensor 55.
The Y-axis moving base 41 is stopped at the position where the output value of the photo sensor 55 matches the above-mentioned intermediate value.

Then, by adjusting the mounting position of the R reflective liquid crystal light valve 19R in the X-axis direction and the Y-axis direction as described above, the boundary portions XK and YK are used as the reference for the G reflective type. The adjustment of registration is completed because it coincides with the case of projection with the liquid crystal light valve (19G).

Next, the reflection type liquid crystal light valve 19 for B is used.
When adjusting the mounting position of B in the X-axis direction and the Y-axis direction, the X-axis direction adjustment pattern signal 52xb for B and the Y-axis direction adjustment pattern signal 52yb for B are set to the reflective liquid crystal light valve for B. 19B in order to sequentially display the X-axis direction adjustment pattern image light for B and the Y-axis direction adjustment pattern image light for B on the screen 23, and the reflection type liquid crystal light valve 19R for R and The procedure may be similar.

After that, when the adjustment of the mounting positions of the R and B reflection type liquid crystal light valves 19R and 19B is completed, the reflection type liquid crystal light valves 19R, 19G and 19B are supplied to the reflection type liquid crystal light valves 19R, 19G and 19B from the image signal 52 of each color. 52er, 5
By simultaneously applying 2 gg and 52 eb), it is possible to obtain one color image on the screen 23 in which no registration deviation occurs.

According to the first embodiment described above, if a service person or the like carries the photo sensor 55, the user can easily perform registration adjustment.

<Second Embodiment> FIG. 7 is a block diagram showing a signal processing unit of a second embodiment in a projection type display apparatus according to the present invention, and FIGS. 8A and 8B are shown in FIG. X for displacing the photo sensor in the X-axis direction and / or the Y-axis direction
It is a perspective view for explaining an axis drive part and a Y-axis drive part.

The signal processor 5 of the second embodiment shown in FIG.
0B is the signal processing unit 50A of the first embodiment described above.
It is the same configuration except for a part, here, for convenience of description, the same reference numerals are given to the components shown above,
The difference from the first embodiment will be mainly described.

As shown in FIG. 7, in the signal processing unit 50B of the second embodiment, the photo sensor 55 provided in the front center portion of the screen 23 is displaced in the X axis direction and / or the Y axis direction with respect to the screen 23. The photosensor 55 is attached to one of the photosensor X-axis drive unit 80 and the photosensor Y-axis drive unit 90 so that the photosensor 55 can be used.

The photosensor X-axis drive unit 80 and the photosensor Y-axis drive unit 90 described above are arranged on the X-axis moving table 81 on the base table 70, as shown enlarged in FIGS. 8A and 8B.
The Y-axis moving base 91 and the Y-axis moving base 91 are provided so as to be automatically displaceable in the X-axis direction and the Y-axis direction in a two-stage stack, and the specific structure will be described with reference to FIGS. 2 (a) and 2 (b). Explained light valve X
Since it has the same structure as the shaft drive unit 30 and the light valve Y-axis drive unit 40, detailed description thereof will be omitted here.

In accordance with the above, in the signal processing unit 50B,
A photosensor X-axis drive circuit 58 and a photosensor Y-axis drive circuit 59 are provided. These photo sensors X
The axis drive circuit 58 and the photosensor Y-axis drive circuit 59 are
The photo sensor X-axis drive unit 80 and the photo sensor Y to which the photo sensor 55 is attached according to a command from the microcomputer 51.
The X-axis drive signal 58a and the Y-axis drive signal 59 are sent to the axis drive unit 90.
a is output via terminals T2 and T3. On the other hand, the photo sensor X-axis drive unit 80 and the photo sensor Y-axis drive unit 9
0 to an X-axis reference position signal 80a indicating the reference position of the X-axis moving base 81 in the X-axis direction and a Y-axis reference position signal 90a indicating the reference position of the Y-axis moving base 91 in the Y-axis direction.
It is input via a counter 5 to a counter (not shown) provided in the microcomputer 51. In this case as well, the count counter (not shown) provided in the microcomputer 51 is preset at the timing when the X-axis reference position signal 80a and the Y-axis reference position signal 90a are respectively output, so that the X-axis moving table 8
The positions of the 1 and Y-axis moving bases 91 and the value of the counter can hold a predetermined relationship.

In the second embodiment, the X-axis direction adjustment pattern image light and the Y-axis direction adjustment pattern image light are sequentially projected on the screen 23 by the reference reflective liquid crystal light valve for G (19G). Then, FIG. 5 (b) described above
6B, the projection position is determined by changing the adjustment pattern in the first embodiment.
Since the movement of the adjustment pattern is performed in the unit of a dot of the reflective liquid crystal light valve, the positioning accuracy becomes rough. However, here, since the photosensor 55 can be gradually displaced, the R and B reflection liquid crystal light valves 19R, 19R, and 19R, which are the reference G reflection liquid crystal light valves (19G), are used. 19B can be positioned with higher accuracy.

Therefore, in the second embodiment, the X generated by the adjustment pattern signal generator 52B in the video circuit 52 is generated.
The axial direction adjustment pattern signal 52x and the Y axis direction adjustment pattern signal 52y are, for example, as shown in FIG. 5 (b) and FIG. 6 (b).
The predetermined adjustment pattern in the state shown in (4) is preset and projected on the screen 23.

That is, the X-axis direction adjustment pattern signal 52xg for G and the Y-axis direction adjustment pattern signal 52yg for G, which are the reference colors, are kept constant in the states shown in FIGS. 5 (b) and 6 (b). The adjustment pattern is sequentially applied to the reflective liquid crystal light valve (19G).

In this state, the photosensor 55 is moved by the photosensor X-axis section 80 and the photosensor Y-axis drive section 90 to X-axis.
The output value in a state of being displaced in the axial direction and the Y-axis direction so that the light-receiving surface of the photo sensor 55 is entirely covered with the pattern of the non-projection portion when the X-axis direction is adjusted and the Y-axis direction is adjusted, and the photo sensor. An intermediate value with the output value in a state where the light receiving surface of 55 is entirely covered with the pattern of the projected portion where G light is applied is calculated, and the photo sensor 55 is set at a position where each intermediate value in the X axis direction and the Y axis direction is obtained. If stopped, the light-receiving surface of the photosensor 55 at the boundary portions XK and YK shown in FIGS. 5B and 6B is approximately 2 in the X-axis direction and the Y-axis direction, respectively.
It is positioned in the divided position.

After that, with the photo sensor 55 fixed at the above position, the pattern signal 52xr for adjusting the X-axis direction for R having the same fixed pattern and different color as described above is provided to the reflective liquid crystal light valve 19R for R. And the Y-axis direction adjustment pattern signal 52yr for R are sequentially applied, and the reflection type liquid crystal light valve 19R for R is displaced in the X-axis direction and the Y-axis direction by the X-axis moving table 81 and the Y-axis moving table 91, respectively. Of the output value in the state where the light receiving surface of the photo sensor 55 is entirely covered with the pattern of the non-projection portion where the light does not reach Calculate the intermediate value between the output value and X
If the reflective liquid crystal light valve 19R for R is stopped at a position where an intermediate value in each of the axial direction and the Y-axis direction is obtained, the boundary portions XK and YK will cause the reflective liquid crystal light valve for G (19).
Since it coincides with the case of projecting G), it becomes possible to perform good registration adjustment.

Hereinafter, the reflection type liquid crystal light valve 19 for B is used.
B may be performed in the same manner as the reflective liquid crystal light valve 19R for R.

Accordingly, if a service person or the like carries the photosensor X-axis drive unit 80 and the photosensor Y-axis drive unit 90 to which the photosensor 55 is attached, the user can easily and accurately perform the registration adjustment. be able to.

<Third Embodiment> FIG. 9 is a block diagram showing a signal processing unit of a third embodiment in a projection type display apparatus according to the present invention.

The signal processing section 5 of the third embodiment shown in FIG.
0C is the signal processing unit 50A of the first embodiment described above.
It is the same configuration except for a part, here, for convenience of description, the same reference numerals are given to the components shown above,
Here, the points different from the first embodiment will be mainly described.

As shown in FIG. 9, in the signal processor 50C of the third embodiment, temperature sensors 60 using a thermistor or the like are provided near at least the R and B reflective liquid crystal light valves 19R and 19B, respectively. It is installed.
Further, an analog temperature sensor signal 60a from the temperature sensor 60 is detected by a temperature sensor detection circuit 61, and the detection signal 61a detected here is A / D converted by an A / D converter 62.
After conversion, the value of the digital / temperature sensor signal 62a is input to the microcomputer 51.

Here, in general, the projection type display device 10
In FIG. 1, the reflective liquid crystal light valves 19R, (1
9G) and 19B, the reflection-type liquid crystal light valves 19R, (19G), and 19B expand and contract under the influence of the ambient temperature, which tends to cause misregistration.

Therefore, in the third embodiment, how much the registration of the reflective liquid crystal light valves 19R, (19G) and 19B deviates depending on the temperature before the projection type display device 10 (FIG. 1) is shipped from the factory. By grasping each data of R, the R for the reflective liquid crystal light valve for G (19G) which is the reference based on these data
The user can automatically adjust the mounting positions of the reflection type liquid crystal light valves 19R and 19B for B and B.

That is, before the projection type display device 10 (FIG. 1) is shipped from the factory, the temperature inside the projection type display device 10 is changed as a whole so that at least the reflection type liquid crystal light valves for R and B are used. The temperatures in the vicinity of 19R and 19B are measured by the temperature sensor 60, and the output values of the temperature sensor 60 at that time are stored in the memory 51a in the microcomputer 51.

At this time, a plurality of temperatures are set in consideration of the temperature change in the reading light source 12 (FIG. 1) when the power is turned on and after the power is turned on, the temperature change in the room, and the like. By setting the plurality of temperatures to be equal to or higher than the predetermined temperatures at which the dimensional changes of the reflective liquid crystal light valves 19R, (19G), and 19B occur, the number of temperature settings can be reduced.

Here, for example, when the output value of the temperature sensor 60 installed in the vicinity of the reflective liquid crystal light valve 19R for R is input to the microcomputer 51, the reflective liquid crystal for G which becomes a reference under this temperature condition is inputted. In order to obtain data on how much the mounting position of the reflective liquid crystal light valve 19R for R with respect to the light valve (19G) should be displaced in the X-axis direction and / or the Y-axis direction, it has been described above. The reflective liquid crystal light valve 1 for R using the technique of the first embodiment
The amount of displacement of the 9R in the X-axis direction and the amount of displacement in the Y-axis direction are adjusted. And a reflective liquid crystal light valve 19R for R
Direction and pulse number of the first stepping motor 33 (FIG. 2) and the second stepping motor 43 (FIG. 2) corresponding to the X-axis direction displacement amount and the Y-axis direction displacement amount, respectively.
The rotation direction and the number of pulses were measured respectively, and the results obtained here were correlated with the temperature to read only the ROM (Read Only).
(Memory) 63. ROM6
Instead of 3, flash memory may be used.

After that, the reflective liquid crystal light valve 1 for R is used.
The temperature in the vicinity of 9R may be changed and the other temperatures may be changed in the same manner as described above. Further, the temperature sensor 60 provided in the vicinity of the reflective liquid crystal light valve 19B for B may also be reflected by the R sensor. The same operation as in the case of the type liquid crystal light valve 19R may be performed.

In the case of this third embodiment, the first
Although it is necessary to install the photo sensor 55 in the front center part of the screen 23 as described in the embodiment, after the projection type display device 10 (FIG. 1) is shipped from the factory,
A reflective liquid crystal light valve 1 that is a target for alignment at the user's end without using the photo sensor 55 at the user's end
The temperatures in the vicinity of 9R and 19B are measured, and for R and B based on the data from the ROM 63 corresponding to the measured temperatures.
By adjusting the mounting positions of the reflective liquid crystal light valves 19R and 19B for R, the reflective liquid crystal light valves 19R and 19B for R and the reflective liquid crystal light valves 19R and 19B for G are compared to the reference reflective liquid crystal light valve for G (19G). Registration adjustment can be performed automatically.

Although not shown, the technique of the second embodiment can be applied at the time of adjustment in the factory in the third embodiment.

Furthermore, in the projection type display device 10 (FIG. 1) of the first to third embodiments according to the present invention, the reflection type liquid crystal light valve is used as the projection display element of each color, but Without limitation, the techniques of the first to third embodiments can be applied even when a projection display element is configured by combining a CRT and a transmissive light modulation element for each color.

<Application Example> In the signal processing units 50A to 50C of the above-described first to third embodiments, the reflection type liquid crystal light valve 19G for G which serves as a reference at the time of registration adjustment.
The reflective liquid crystal light valves 19R and 19B for R and B which are to be aligned with respect to the X-axis direction and / or Y
The description has been given using the light valve X-axis drive unit 30 and the light valve Y-axis drive unit 40 shown in FIG. 2 as the displacement means for alignment when automatically displacing in the axial direction. The positioning displacement means of any one of the application examples 1 to 6 described may be applied.

(Application Example 1) FIG. 10 is a perspective view showing Application Example 1 for automatically displacing the R or B reflective liquid crystal light valve in the X-axis direction and / or the Y-axis direction. .

As shown in FIG. 10, the light valve X-axis drive section 11 serving as the positioning displacement means in the application example 1.
In the 0 and light valve Y-axis drive section 120, an X-axis moving stand 111 and a Y-axis moving stand 121 are stacked in two stages on the base stand 101 serving as a fixed member, and as described later, first and second
Both moving bases 111 and 121 are automatically displaceable in the X-axis direction and the Y-axis direction by the driving force of the laminated piezoelectric elements 112 and 122. In addition, R on the Y-axis moving base 121
The reflective liquid crystal light valve 19R for B or the reflective liquid crystal light valve 19B for B is fixed toward the polarization beam splitter 18R side or the polarization beam splitter 18B side. At this time, the rectangular stands 101, 111, 121
Are formed to have substantially the same vertical and horizontal dimensions.

The support frame 102R or the support frame 102B attached to the lower surface of the base 101 is the bracket 25R or the polarization plate for B fixed to the polarization beam splitter 18R for R described above with reference to FIG. It is for attaching to the bracket 25B fixed to the beam splitter 18B side.

The light valve X-axis drive unit 110 described above.
The first laminated piezoelectric element 112 is interposed between the projecting portion 101a1 projecting on the front side surface 101a of the base 101 and the projecting section 111a1 projecting on the front side surface 111a of the X-axis moving table 111. And the first laminated piezoelectric element 112
Both ends of are fixed to both protrusions 101a1 and 111a1 with an adhesive or the like. Nothing is attached to the front side surface 121a of the Y-axis moving base 121.

On the other hand, the above-mentioned light valve Y-axis drive unit 1
Reference numeral 20 denotes a protruding portion 111b1 that protrudes from the right side surface 111b of the X-axis moving base 111 and the right side surface 12 of the Y-axis moving base 121.
The second laminated piezoelectric element 122 is interposed between the protruding portion 121b1 and the protruding portion 121b1 which are protruded to 1b. Both ends of the second laminated piezoelectric element 122 are fixed to the protruding portions 111b1 and 121b1 with an adhesive or the like. There is.

Then, the first and second laminated piezoelectric elements 11
2, 122 are set to predetermined reference lengths Lx and Ly by applying a predetermined reference voltage in the initial state. After this, the X-axis moving base 111 and the Y-axis moving base 121
When driving the first and second laminated piezoelectric elements 1, the voltage value is increased or decreased with respect to each predetermined reference voltage at the initial stage.
Since the lengths of 12 and 122 are Lx ± ΔLx and Ly ± ΔLy, respectively, which expand and contract with respect to the initial time, the X-axis moving table 11
1, the Y-axis moving base 121 is automatically displaced in the X-axis direction and the Y-axis direction, respectively, whereby the R reflective liquid crystal light valve 19R or the B reflective liquid crystal fixed to the Y-axis movable base 121 is used. The light valve 19B can also be automatically displaced in the X-axis direction and / or the Y-axis direction.

In addition, in the application example 1, the reflective liquid crystal light valve 19R for R or the reflective liquid crystal light valve 19B for B is fixed on the Y-axis moving base 121, but Y on the base base 101. The axis moving base 121 is attached, and the X axis moving base 111 is attached on the Y axis moving base 121.
A reflective liquid crystal light valve 1 for R on the X-axis moving base 111
The reflective liquid crystal light valve 19B for 9R or B may be fixed and attached.

(Application Example 2) FIG. 11 is a perspective view showing an application example 2 for automatically displacing a reflective liquid crystal light valve for R or B in the X-axis direction and / or the Y-axis direction. 1
2 (a) to 2 (d) are plan views schematically showing the operation of the application example 2 shown in FIG.

As shown in FIG. 11, the light valve XY axis drive unit 1 serving as the displacement means for positioning in the application example 2.
In 30A, the movable base 132 has a pair of leaf springs 13 inside the support frame 131, which has a rectangular shape and is a fixed member.
It is automatically displaceably supported in the X-axis direction and / or the Y-axis direction by a driving force such as a lead screw (not shown) or a laminated piezoelectric element via 3,134. At this time, a lead screw (not shown), a laminated piezoelectric element, or the like is installed in each of the X-axis direction and the Y-axis direction.

The above-mentioned support frame 131 supports the movable base 132 inside through the pair of leaf springs 133 and 134, and the bottom surface 131a is the R described above with reference to FIG.
The bracket 25R fixed to the polarized beam splitter 18R for B or the bracket 25B fixed to the polarized beam splitter 18B for B is attached.

Further, the movable table 132 is provided with a reflection type liquid crystal light valve 19R for R or a reflection type liquid crystal light valve 19B for B on the side of the polarization beam splitter 18R or the polarization beam on one flat surface 132a formed in a substantially rectangular shape. It is fixed toward the splitter 18B side. In addition, the moving table 13
No. 2 flat surface 132a and the other flat surface 13 facing each other
On the 2b side, a lead screw linearly advancing and retreating in connection with a motor drive source (not shown), or an X-axis pressing force for pressing in the X-axis direction by a laminated piezoelectric element that expands and contracts in response to voltage application. A piece 132c is formed on the right side surface 132i side of the movable table 132 so as to project in the central portion in the Y-axis direction.
In addition, the Y-axis direction pressing piece 132 for pressing in the Y-axis direction
d is formed so as to project on the rear side 132f side of the moving table 132 at the central portion in the X-axis direction.

Further, notches 132g are cut out in a rectangular shape at corners at four corners of the moving table 132, and the notches 132g at these four corners are provided as a pair of leaf springs 133,1.
It is for escape when 34 is displaced.

The pair of leaf springs 133 and 134 are bent in a U shape so as to face each other, and the intermediate portions 133a and 134a of the pair of leaf springs 133 and 134 are formed.
Are fixed to the left and right side surfaces 132h and 132i of the movable table 132 by screws 135 near the cutouts 132g.

Further, both ends of the leaf spring 133 on the front side in the drawing are bent in a U-shape on the front and rear side surfaces 132e, 132f of the moving base 132 to form U-shape portions 133b, 133c. U-shaped portions 133b and 133c
U-shaped support portions 133b1 and 133c1 formed at the tip of the
Is attached to the inside of the bottom surface portion 131a of the support frame 131 so as to face each other, and the screws 13 are attached to the support pieces 131b and 131c.
It is fixed by 6. Further, both ends of the leaf spring 134 on the back side in the drawing, which is symmetrical to the above, are provided on the front and rear side surfaces 1 of the moving table 132.
U-shaped holding portions 134b and 134c are formed by being bent in a U-shape on the sides of 32e and 132f, and the U-shaped support portion 1 formed at the tips of these U-shaped portions 134b and 134c.
34b1 and 134c1 are bottom surfaces 131 of the support frame 131.
Support piece 131 cut and raised so as to face each other inside a
The screws 136 are fixed to the d and 131e.

Next, the operation of the light valve XY axis drive unit 130A in the application example 2 configured as described above will be described with reference to FIG.
A description will be given using (a) to (d).

First, as shown in FIG. 12A, the light valve XY-axis drive section 130A is in an initial state, and the movable table 132 is provided in the support frame 131 with a pair of leaf springs 133, 13.
It is supported via 4 so as to be displaceable in the X-axis direction and / or the Y-axis direction.

Here, the other flat surface 1 of the movable table 132.
Since the force does not act on the X-axis direction pressing piece 132c and the Y-axis direction pressing piece 132d that are formed to project at 32b, the pair of leaf springs 133 and 134 are not displaced at all, so they are fixed to the moving base 132. The reflective liquid crystal light valve 19R for R or the reflective liquid crystal light valve 19B for B maintains the initial state without being displaced in the X-axis direction and / or the Y-axis direction.

Next, as shown in FIG. 12 (b), the force F is applied to the X-axis direction pressing piece 132c formed on the moving table 132 by a lead screw (not shown) or a laminated piezoelectric element.
When pressed in the X1 direction with x, a pair of leaf springs 133, 13
Since the vicinity of both ends of each intermediate portion 133a, 134a of 4 is displaced in the X1 direction, the reflective liquid crystal light valve 19R for R or the reflective liquid crystal light valve 19B for B fixed to the moving table 132 is also displaced in the X1 direction. Can be displaced.

When the movable table 132 is displaced in the direction opposite to the X1 direction, the X-axis direction pressing piece 132c formed on the movable table 132 by a lead screw (not shown) or a laminated piezoelectric element is reversed. It is sufficient to press with the directional force −Fx.

Next, as shown in FIG. 12 (c), a force F is applied to the Y-axis direction pressing piece 132d formed on the moving table 132 by a lead screw (not shown) or a laminated piezoelectric element.
When pressed in the Y1 direction with y, the pair of leaf springs 133, 13
4 U-shaped portions (133b, 133c), (134b,
134c) is displaced in the Y1 direction, so that the reflective liquid crystal light valve 19 for R fixed to the moving base 132 is formed.
The reflective liquid crystal light valve 19B for R or B can also be displaced in the Y1 direction.

When the movable table 132 is displaced in the direction opposite to the Y1 direction, the Y-axis direction pressing piece 132d formed on the movable table 132 by a lead screw (not shown) or a laminated piezoelectric element is reversed from the above. It may be pressed with a directional force −Fy.

Next, as shown in FIG. 12 (d), a force F is applied to the X-axis direction pressing piece 132c formed on the moving table 132 by a lead screw (not shown) or a laminated piezoelectric element.
While pressing in the X1 direction with x, the Y-axis direction pressing piece 132
When d is pressed in the Y1 direction by the force Fy, the pair of leaf springs 13
The vicinity of both ends of each intermediate portion 133a, 134a of 3,134 is displaced in the X1 direction, and each U-shaped portion (133b, 1
33c) and (134b, 134c) are displaced in the Y1 direction, the R reflective liquid crystal light valve 19R for R or the reflective liquid crystal light valve 19B for B fixed to the moving base 132 is also moved in the X1 direction and the Y1 direction. Can be displaced.

Next, a modification obtained by partially modifying the application example 2 will be briefly described with reference to FIGS. 13 and 14.

FIG. 13 is a perspective view showing a modified example in which the application example 2 for automatically displacing the R or B reflective liquid crystal light valve in the X-axis direction and / or the Y-axis direction is partially modified. 14A to 14D are plan views schematically showing the operation of a modified example in which the application example 2 shown in FIG. 13 is partially modified.

As shown in FIG. 13, the light valve XY axis drive unit 130B obtained by partially modifying the application example 2 is a light valve XY axis drive unit 130A in the application example 2 described above.
On the other hand, Y is provided on the other flat surface 132b side of the movable table 132.
First and second Y-axis pressing pieces 13 for pressing in the axial direction
The only difference is that 2d1 and 132d2 are formed in a protruding manner. Others are the light valve XY axis drive unit 130A.
Since it is the same as the above, the same reference numerals are given to the same constituent members, and the description is omitted and only illustrated.

At this time, the first and second Y-axis direction pressing pieces 132d1 and 132d2 of the movable table 132 are divided into two parts on the left and right sides toward the supporting pieces 131c and 131e formed on the supporting frame 131 and are formed in two places. There is.

Next, the operation of the light valve XY axis drive unit 130B, which is a partial modification of the application example 2 configured as described above, will be described with reference to FIGS.

First, as shown in FIG. 14A, the light valve XY-axis drive section 130B is in the initial state, and the movable table 132 is provided in the support frame 131 with a pair of leaf springs 133, 13.
It is supported via 4 so as to be displaceable in the X-axis direction and / or the Y-axis direction.

Here, the other flat surface 1 of the movable table 132.
Since no force acts on the X-axis direction pressing piece 132c protrudingly formed on 32b and the first and second Y-axis direction pressing pieces 132d1 and 132d2, the pair of leaf springs 133, 1
Since 34 does not move at all, R fixed to the moving base 132
The reflective liquid crystal light valve 19R for B or the reflective liquid crystal light valve 19B for B maintains the initial state without being displaced in the X-axis direction and / or the Y-axis direction.

Next, as shown in FIG. 14B, the force F is applied to the X-axis direction pressing piece 132c formed on the moving table 132 by a lead screw (not shown) or a laminated piezoelectric element.
When pressed in the X1 direction with x, a pair of leaf springs 133, 13
Since the vicinity of both ends of each of the intermediate portions 133a and 134a of 4 is displaced in the X1 direction, the reflective liquid crystal light valve 19R for R or the reflective liquid crystal light valve 19B for B fixed to the moving table 132 is also displaced in the X1 direction. Can be displaced.

When the movable table 132 is displaced in the direction opposite to the X1 direction, the X-axis direction pressing piece 132c formed on the movable table 132 by a lead screw (not shown), a laminated piezoelectric element or the like is reversed from the above. It is sufficient to press with the directional force −Fx.

Next, as shown in FIG. 14C, the first and second Y-axis direction pressing pieces 13 formed on the moving base 132 by a lead screw (not shown) or a laminated piezoelectric element.
When 2d1 and 132d2 are pressed in the Y1 direction with the same force Fy and Fy, the U-shaped portions (133b, 133c) and (134b, 134c) of the pair of leaf springs 133 and 134 are Y-shaped.
Since the displacement is substantially parallel to one direction, the moving table 13
The R reflective liquid crystal light valve 19R for R or the reflective liquid crystal light valve 19B for B fixed to 2 can also be displaced substantially parallel to the Y1 direction.

When the movable table 132 is displaced in the direction opposite to the Y1 direction, the first and second Y-axis direction pressing pieces 132d1 formed on the movable table 132 by a lead screw (not shown) or a laminated piezoelectric element. 132d2 may be pressed with the same force -Fy, -Fy in the opposite direction.

Next, as shown in FIG. 14D, a first Y-axis direction pressing piece 132d1 formed on the moving table 132 by a lead screw (not shown), a laminated piezoelectric element, or the like.
Is pressed in the Y1 direction with a force Fy1, and the second Y-axis direction pressing piece 132d2 is pressed with a force Fy2 that is weaker than the force Fy1.
When it is pressed in the direction, a rotational moment M in the clockwise direction in the figure acts on the moving base 132, and the vicinity of both ends of the intermediate portions 133a and 134a of the pair of leaf springs 133 and 134 and the U-shaped portions (133b, 133c), ( (134b, 134c) are displaced in the clockwise direction in the figure, and this causes the movable table 132 to move.
R-type reflective liquid crystal light valve 19R or B fixed to R
The reflection-type liquid crystal light valve 19B for use also can be displaced clockwise in the drawing with respect to the X axis and the Y axis.

(Application Example 3) FIG. 15 (a) shows Application Example 3 for automatically displacing the reflective liquid crystal light valve for R or B only in the X-axis direction, and FIG. 15 (b) is for R 16A is a perspective view showing an application example 3 for automatically displacing the reflective liquid crystal light valve for B only in the Y-axis direction, FIG.
(D) is a schematic plan view for explaining the operation of the application example 3 shown in FIG. 15.

In the application example 3 shown in FIGS. 15A and 15B, depending on the projection display device 10 (FIG. 1), the reflection liquid crystal light valve 19G for G, which is the reference, is reflected by the reflection liquid crystal light for R. Type liquid crystal light valves 19R and B, and the reflection type liquid crystal light valve 19B is automatically displaced only in the X-axis direction for easy registration adjustment, or is automatically displaced only in the Y-axis direction for simple adjustment. It is configured so that the cash register can be adjusted.

First, as shown in FIG. 15A, the light valve X serving as the positioning displacement means in the application example 3.
In the shaft driving unit 140A, a movable base 142 has a hollow inside and a fixed frame member 141 serving as a fixing member. The movable base 142 includes a pair of left and right leaf springs 143 and 144, and a lead screw (not shown) or a laminated piezoelectric element. It is automatically displaceably supported only in the X-axis direction by a driving force such as.

The above-mentioned support frame 141 supports the moving base 142 inside through a pair of leaf springs 143 and 144, and the bottom surface 141a has the R described above with reference to FIG.
The bracket 25R fixed to the polarized beam splitter 18R for B or the bracket 25B fixed to the polarized beam splitter 18B for B is attached.

On the other hand, the movable base 142 is provided with one flat surface 142a formed in a substantially rectangular shape, and the reflection type liquid crystal light valve 19R for R or the reflection type liquid crystal light valve 19B for B is attached to the polarization beam splitter 18R side or the polarization beam side. It is fixed toward the splitter 18B side.

Further, a spring support piece 142d is formed to project outward at a central portion of the left side surface 142c of the movable table 142, and a central portion of the leaf spring 143 is fixed to the outside of the spring support piece 142d by a screw 145. There is. Further, a spring support piece / X-axis direction pressing piece 142f is formed to project outward at a central portion of the right side surface 142e of the moving base 142, and the spring supporting piece / X-axis direction pressing piece 142f is provided on one side of the moving base 142. It is also formed so as to project to the other flat surface 142b side opposite to the flat surface 142a of the above, and the central portion of the leaf spring 144 is fixed by a screw 145 to the outside of this spring supporting piece / X-axis direction pressing piece 142f. The pair of leaf springs 143, 144 are opposed to each other along the left and right side surfaces 142c, 142e of the moving base 142, and both end portions of the pair of leaf springs 143, 144 are located inside the support frame 141. Cut-and-raised support pieces 141b-1
The screws 41e are fixed to the screws 41e.

Next, as shown in FIG. 15B, the light valve Y serving as the positioning displacement means in the application example 3.
In the shaft drive unit 140B, the movable base 142 is provided inside the support frame 141 whose inside is hollowed out in a rectangular shape so that the pair of front and rear leaf springs 14 is provided.
It is automatically displaceably supported only in the Y-axis direction by a driving force such as a lead screw (not shown) or a laminated piezoelectric element via 7, 148.

The above-mentioned support frame 141 supports the movable base 142 inside through a pair of leaf springs 147 and 148, and the bottom surface part 141a has the radius R described above with reference to FIG.
The bracket 25R fixed to the polarized beam splitter 18R for B or the bracket 25B fixed to the polarized beam splitter 18B for B is attached.

On the other hand, the movable base 142 is provided with one flat surface 142a formed in a substantially rectangular shape, and the reflection type liquid crystal light valve 19R for R or the reflection type liquid crystal light valve 19B for B is attached to the polarization beam splitter 18R side or the polarization beam side. It is fixed toward the splitter 18B side.

Further, a spring supporting piece 142h is formed so as to project outward at a central portion of the front side surface 142g of the movable table 142, and a central portion of the leaf spring 147 is fixed to the outside of the spring supporting piece 142h by a screw 145. There is. Further, a spring support piece / Y-axis direction pressing piece 142j is formed to project outward at a central portion of the rear side surface 142i of the moving table 142, and the spring supporting piece / Y-axis direction pressing piece 142j is formed on one side of the moving table 142. Is also formed so as to project on the side of the other flat surface 142b that faces the flat surface 142a, and the central portion of the leaf spring 148 is fixed to the outside of this spring supporting piece / Y-axis direction pressing piece 142j with a screw (145). There is. And
The pair of leaf springs 147, 148 face each other along the front and rear side surfaces 142g, 142i of the moving base 142, and both end portions of the pair of leaf springs 147, 148 are cut and raised from the inside of the support frame 141. Support piece 141f
To 141i are respectively fixed by screws 146.

Next, the operations of the light valve X-axis drive unit 140A and the light valve Y-axis drive unit 140B in the application example 3 configured as described above will be described with reference to FIGS. 16 (a) to 16 (d).

First, as shown in FIG. 16A, the light valve X-axis drive unit 140A is in the initial state, and the movable base 142 is provided in the support frame 141 with the pair of leaf springs 143, 144.
Is supported so as to be displaceable only in the X-axis direction.

Here, the other flat surface 1 of the movable table 142.
A spring support piece and X-axis direction pressing piece 14 formed to project at 42b
Since no force acts on 2f, the pair of leaf springs 1
Since 43 and 144 are not displaced at all, the R reflective liquid crystal light valve 19R for R or the B reflective liquid crystal light valve 19B for B fixed to the moving base 142 maintains the initial state without being displaced in the X-axis direction.

Next, as shown in FIG. 16B, a spring support piece / X-axis direction pressing piece 1 formed on the moving base 142 by a lead screw (not shown) or a laminated piezoelectric element.
When 42f is pressed in the X1 direction by the force Fx, the respective intermediate portions of the pair of leaf springs 143, 144 are displaced in the X1 direction, so that the reflection type liquid crystal light valve for R 19R or B fixed to the moving base 142 is used. The reflective liquid crystal light valve 19B can also be displaced in the X1 direction.

When displacing the moving base 142 in the direction opposite to the X1 direction, the X-axis direction pressing piece 142f formed on the moving base 142 by a lead screw (not shown), a laminated piezoelectric element or the like is reversed from the above. It is sufficient to press with the directional force −Fx.

Next, as shown in FIG. 16 (c), the light valve Y-axis drive section 140B is in the initial state, and the movable table 142 in the support frame 141 has a pair of leaf springs 147, 148.
Is supported so as to be displaceable only in the Y-axis direction.

Here, the other flat surface 1 of the movable table 142.
Spring support piece / Y-axis direction pressing piece 14 formed to project at 42b
Since no force acts on 2j, the pair of leaf springs 1
Since 47 and 148 are not displaced at all, the R reflective liquid crystal light valve 19R for R or the B reflective liquid crystal light valve 19B for B fixed to the moving base 142 maintains the initial state without being displaced in the Y-axis direction.

Next, as shown in FIG. 16D, a spring support piece / Y-axis direction pressing piece 1 formed on the moving base 142 by a lead screw (not shown) or a laminated piezoelectric element.
When 42j is pressed in the Y1 direction by the force Fy, the respective intermediate portions of the pair of leaf springs 147 and 148 are displaced in the Y1 direction, so that the R-use reflective liquid crystal light valve 19R or B fixed to the moving table 142 is used. The reflective liquid crystal light valve 19B can also be displaced in the Y1 direction.

When the movable table 142 is displaced in the direction opposite to the Y1 direction, the Y axis direction pressing piece 142j formed on the movable table 142 by a lead screw (not shown) or a laminated piezoelectric element is reversed from the above. It may be pressed with a directional force −Fy.

(Application 4) FIG. 17 is a perspective view showing Application 4 for automatically displacing the R or B reflective liquid crystal light valve in the X-axis direction and / or the Y-axis direction. 18A shows a state in which the light valve XY axis drive unit is fixed to the polarization beam splitter side, and FIG. 18B shows a state in which the light valve XY axis drive unit is seen from below, FIG.
(A)-(d) is a top view typically shown in order to demonstrate operation | movement of the application example 4 shown in FIG.

As shown in FIG. 17A, in the light valve XY-axis drive section 150 which is the displacement means for positioning in the application example 4, the support frame 151 which is a fixed member is formed into a substantially rectangular frame. The movable table 152 includes three laminated piezoelectric elements 153-155 and three compression coil springs 15.
It is automatically displaceably supported in the X-axis direction and / or the Y-axis direction by the driving force of each laminated piezoelectric element 153-155 via 6-158.

The support frame 151 described above includes three laminated piezoelectric elements 153-154 and three compression coil springs 15.
The bracket 25R that supports the movable table 152 inside via 6 to 158 and has the corner bottom parts 151a at the four corners fixed to the R polarization beam splitter 18R or the bracket 2R fixed to the B polarization beam splitter 18B side.
It is designed to be attached to 5B.

Further, as shown in FIG. 17B, the movable table 152 has one flat surface 152a formed in a substantially rectangular shape and has a reflection liquid crystal light valve 19 for R or a reflection liquid crystal light valve for B. 19B is a polarization beam splitter 18R
Side or the polarization beam splitter 18B side.

Returning to FIG. 17 (a), the inside of the front side surface 151b of the support frame 151 and the front side surface 152b of the movable table 152.
Between the outside and the two laminated piezoelectric elements 153, 15
4 are fixed to the left and right with an adhesive material with a space therebetween.
Two compression coil springs 156 and 157 are fixed to each other between the inner side of the rear side surface 151c of the support frame 151 and the outer side of the rear side surface 152c of the movable table 152 by an adhesive material with a space left and right. There is. At this time, the two laminated piezoelectric elements 153 and 154 and the two compression coil springs 156 and 15
7 and 7 are opposed to each other via the movable table 152.

Further, between the inside of the left side surface 151d of the support frame 151 and the outside of the left side surface 152d of the movable table 152, one compression coil spring 158 is fixed to the central portion in the Y-axis direction with an adhesive material. Has been done. In addition, the support frame 151
Inside the right side surface 151e of the
Between the outside of 2e, one laminated piezoelectric element 155 is fixed to the central portion in the Y-axis direction with an adhesive material. At this time, one compression coil spring 158 and one laminated piezoelectric element 155 face each other via the moving base 152.

Next, the operation of the light valve XY axis drive unit 150 in the application example 4 configured as described above will be described with reference to FIG.
A description will be given using (a) to (d).

First, as shown in FIG. 18A, the light valve XY axis drive section 150 is in the initial state, and the movable frame 152 is provided in the support frame 151, and the laminated piezoelectric element 153 having three movable bases 152.
˜155 and three compression coil springs 156 to 158 are supported so as to be displaceable in the X-axis direction and / or the Y-axis direction.

Here, the three laminated piezoelectric elements 153-
A predetermined reference voltage is applied to each of the 155, and the moving base 152 is set at the initial reference position in the X-axis direction and the Y-axis direction via the three compression coil springs 156 to 158. The R reflective liquid crystal light valve 19R for R or the reflective liquid crystal light valve 19B for B fixed to the table 152 maintains the initial state in the X-axis direction and / or the Y-axis direction.

Next, as shown in FIG. 18B, a voltage smaller than a predetermined reference voltage is applied to the laminated piezoelectric element 155 so that the force Fx is applied in the X1 direction by one laminated piezoelectric element 155. Then, when the laminated piezoelectric element 155 is contracted,
Since one compression coil spring 158 extends in the X1 direction and presses the moving base 152 with the compression coil spring 158, the R reflection liquid crystal light valve 19R for R or the reflection liquid crystal for B fixed to the movement base 152 by this. Light valve 19
B can also be displaced in the X1 direction.

Next, as shown in FIG.
The same force Fy, Fy is applied to each of the laminated piezoelectric elements 153 and 154.
Are added in the Y1 direction, the laminated piezoelectric elements 153, 15
When a voltage larger than a predetermined reference voltage is applied to 4 to extend the laminated piezoelectric elements 153 and 154, the two compression coil springs 156 and 157 contract in the Y1 direction and the movable table is moved by the laminated piezoelectric elements 153 and 154. Since 152 is pressed,
As a result, the R reflection type liquid crystal light valve 19 for R fixed to the moving table 152 or the reflection type liquid crystal light valve for B 1
9B can also be displaced in the Y1 direction.

Next, as shown in FIG.
A voltage is applied to the laminated piezoelectric element 154 so that the force + Fy1 is applied in the + Y1 direction by the laminated piezoelectric element 154 on the right side of the figure among the laminated piezoelectric elements 153 and 154.
The force −Fy2 is −Y2 in the laminated piezoelectric element 153 on the left side of the drawing.
When a voltage is applied to the laminated piezoelectric element 153 so as to be applied in the direction, the rotational moment M in the counterclockwise direction in the drawing acts on the moving base 152, and the three compression coil springs 156 to 158 are twisted in the counterclockwise direction in the drawing. By moving table 152
R-type reflective liquid crystal light valve 19R or B fixed to R
The reflection-type liquid crystal light valve 19B for use also can be displaced counterclockwise in the drawing with respect to the X axis and the Y axis.

(Application 5) FIG. 19 shows an R or B reflection type liquid crystal light valve for R or B mounted in a support frame so as to be displaceable in the X-axis direction and / or the Y-axis direction. 11A is a perspective view showing an application example 5 for automatically displacing the reflective liquid crystal light valve of FIG. 7A in the Z-axis direction, and FIG. 13A shows a state in which the light valve Z-axis drive unit is fixed to the polarization beam splitter side. , (B) are views showing the state of the light valve Z-axis drive section viewed from below, and FIGS. 20 (a) to 20 (d) are schematic views for explaining the operation of the application example 5 shown in FIG. It is the top view shown.

As shown in FIGS. 19 (a) and 19 (b), in the light valve Z-axis drive section 160 which serves as the positioning displacement means in the fifth application example, the R reflection type liquid crystal light valve 19R or B is used. With the reflective liquid crystal light valve 19B configured to be displaceable in the X-axis direction and / or the Y-axis direction by the light valve XY-axis driving unit 161, the light-valve XY-axis driving unit 161 is mounted in the support frame 162. As will be described later, the supporting frame 162 is automatically displaced in the Z-axis direction by the driving force of the three laminated piezoelectric elements 164 to 166.

The light valve XY axis drive section 161 is
The light valve X-axis drive unit 30 and the light valve Y-axis drive unit 40 previously shown in FIG. 2, or the light valve X-axis drive unit 110 and the light valve Y-axis drive unit 12 shown in FIG.
0, the light valve XY axis drive units 130A and 130B shown in FIGS. 11 and 13, or the light valve X axis drive unit 140A and the light valve Y axis drive unit 1 shown in FIG.
40B or the light valve XY axis drive unit 150 shown in FIG. 17 may be applied.

The light valve XY is attached to the support frame 162.
In the state in which the shaft driving unit 161 is attached, the R reflective liquid crystal light valve 19R or the B reflective liquid crystal light valve 19B is fixed toward the polarization beam splitter 18R side or the polarization beam splitter 18B side.

Further, between the support frame 162 to which the light valve XY axis drive section 161 is attached and the support plate 163 arranged below the support frame 162, three laminated piezoelectric elements 164 to 166 are provided. Both ends of each are fixed by an adhesive material.

At this time, the three laminated piezoelectric elements 164-1
Of the 66, the laminated piezoelectric element 164 is a light valve X.
One laminated piezoelectric element 165, 1 is fixed to the central portion in the X-axis direction on the front side surface 161a side of the Y-axis driving section 161.
Reference numeral 66 denotes a rear side surface 161 of the light valve XY axis drive unit 161.
Two b-sides are fixed to the left and right in the X-axis direction with a space therebetween.

Further, the support plate 163 is lightened into a rectangular shape in the inside thereof and fixed to the R polarization beam splitter 18R by the bracket 25R or the B polarization beam splitter 1.
It is adapted to be attached to the bracket 25B fixed to the 8B side.

Next, FIG. 20 shows the operation of the light valve Z-axis drive unit 160 in the application example 5 configured as described above.
A description will be given using (a) to (d).

First, as shown in FIG. 20A, the light valve Z-axis drive unit 160 is in the initial state, and the support frame 162 to which the light valve XY-axis drive unit 161 is attached,
A predetermined reference voltage is applied to each of the three laminated piezoelectric elements 164 to 166 fixed to the support plate 163, and each of the three laminated piezoelectric elements 164 to 166 has a prescribed reference length. By being set to Lz, the support plate 163
Is set at the initial reference height position with respect to the Z-axis direction, so that the R reflective liquid crystal light valve 19R or the B reflective liquid crystal light valve 19B fixed to the light valve XY axis drive unit 161 is fixed. Is parallel to the support plate 163 at the reference height position in the initial state.

Next, as shown in FIG. 20B, when a voltage larger than a predetermined reference voltage is applied to the three laminated piezoelectric elements 164 to 166 so as to extend by the same size, the three laminated piezoelectric elements 164 to 166 are applied. The length of the laminated piezoelectric elements 164 to 166 is ΔL.
Since it extends by z, the three laminated piezoelectric elements 164 to 16
The total length of 6 is Lz + ΔLz, and the light valve X
Since the support frame 162 to which the Y-axis drive section 161 is attached rises in parallel to the Z1 direction with respect to the support plate 163, the R type reflective liquid crystal light valve 19R for R or the B type fixed to the light valve XY-axis drive section 161. The reflective liquid crystal light valve 19B can also be raised parallel to the Z1 direction.

Next, as shown in FIG. 20C, of the three laminated piezoelectric elements 164 to 166, the laminated piezoelectric element 165 on the left side of the rear side surface is compressed by a predetermined reference voltage so as to be contracted. When a voltage of a small value is applied and a voltage of a value larger than a predetermined reference voltage is applied so as to extend the laminated piezoelectric element 166 on the right side of the rear surface, the support frame body to which the light valve XY axis drive part 161 is attached is applied. 162 is a support plate 163
Since it rotates in the θy direction with respect to, the reflective liquid crystal light valve 19R for R or the reflective liquid crystal light valve 19B for B fixed to the light valve XY axis drive portion 161 is also θy.
Can be rotated in any direction.

Next, as shown in FIG. 20D, among the three laminated piezoelectric elements 164 to 166, the laminated piezoelectric element 164 on the front side center side is contracted, and the rear side left and right sides are contracted. When respective voltage values are applied to the laminated piezoelectric elements 164 to 166 so as to extend the laminated piezoelectric elements 165 and 166, the support frame 162 to which the light valve XY axis drive unit 161 is attached causes the support frame 162 to θx with respect to the support plate 163. Since it rotates in the direction, the R reflective liquid crystal light valve 19R for R or the reflective liquid crystal light valve 19B for B fixed to the light valve XY axis drive unit 161 can also rotate in the θx direction. It is obvious that the laminated piezoelectric element 164 on the center side of the front side surface may be extended and the laminated piezoelectric elements 165, 166 on the left and right sides of the rear side surface may be contracted.

(Application Example 6) FIG. 21 shows an R-type or B-type reflective liquid crystal light valve in the X-axis direction, the Y-axis direction, and the Z-axis direction.
FIG. 21 is a perspective view showing an application example 6 for automatically displacing in the θx direction, the θy direction, and the θz direction.

As shown in FIG. 21, the light valve 6-direction drive unit 2 serving as the displacement means for position alignment in the application example 6.
In 00, the reflective liquid crystal light valve for R 19R or B
The reflective liquid crystal light valve 19B for the Z-axis drive unit 21
0 in the Z-axis direction, the X-axis drive unit 220 in the X-axis direction, the Y-axis drive unit 230 in the Y-axis direction, the θy drive unit 2.
It is automatically displaceable in the θy direction by 40, in the θx direction by the θx drive unit 250, and in the θz direction by the θz drive unit 260.

Generally, when assembling a reflection type liquid crystal light valve, the X-axis direction, Y-axis direction, Z-axis direction,
Although position adjustment with 6 degrees of freedom is performed in the 6 directions of θx direction, θy direction, and θz direction, of the 6 degrees of freedom position adjustment, the ones that have an effect on the screen screen are the registration in the X axis direction and the Y axis direction It is a misalignment (registration misalignment).

This is because the shift in the Z-axis direction causes a shift in focus and a shift in focus on the screen. However, even if the focus is deviated and the focus is slightly loose, the image quality on the screen is not so affected.

The deviation in the θz direction is due to the fact that the pixels are aligned at the center of the screen when the position of the reflective liquid crystal light valve is adjusted, so even if the pixels are laterally displaced on the outer periphery of the screen, When looking at an image, the shift of the center affects the image quality, but does not affect the outer peripheral portion so much.

Further, the deviation in the θx direction and the deviation in the θy direction cause the screen focus shift and the focus shift similarly to the Z axis direction shift, so that the focus shifts.
Even if the focus is slightly loose, the image quality on the screen is not so affected, as is the case with the displacement in the Z-axis direction.

From the above, when the position of the reflective liquid crystal light valve is adjusted, the Z-axis direction, θx direction, θy direction,
Since the influence on the image quality by the displacement in the θz direction is relatively small, if the position is automatically adjusted by using any one of the first to third embodiments as described above with respect to the X axis direction and the Y axis direction. Although good, in this application example 6, the X-axis direction and Y
Not to mention the axial direction, Z-axis direction, θx direction, θy direction,
A reflective liquid crystal light valve 19 for R also in the θz direction
The position of the reflective liquid crystal light valve 19B for R or B is automatically adjustable.

That is, in the light valve 6-direction drive unit 200 shown in FIG. 21, a rectangular Z-axis moving base 211 and a rectangular X-axis moving base 221 are mounted on a rectangular base base 201 serving as a fixing member. , A rectangular Y-axis moving base 231, a rectangular θy rotary base 241, and a rectangular θx rotary base 251.
And the disk-shaped θz rotation base 261 are stacked in this order from the lower side to the upper side. At this time, the rectangular tables 201, 211, 221, 231, 241, 251 are formed to have substantially the same vertical and horizontal dimensions.

Further, the reflection type liquid crystal light valve 19R for R or the reflection type liquid crystal light valve 19B for B is fixed to the polarization beam splitter 18R side or the polarization beam splitter 18B side on the uppermost θz turntable 261. Has been done.

The support frame 202R or the support frame 202B attached to the lower surface of the base 201 is the bracket 25R or B polarization unit fixed to the R polarization beam splitter 18R described above with reference to FIG. It is for attaching to the bracket 25B fixed to the beam splitter 18B side.

First, in the Z-axis drive unit 210 described above, nothing is attached to the front side surface 201a of the base 201, and the first rack 212 is substantially attached to the left side surface 201b of the base 201 along the Z-axis. Mounted vertically.
In addition, the Z-axis moving table 211 provided above the base table 201
On the left side surface 211b of the first stepping motor 213
The first worm 214 is attached substantially vertically along the shaft, and further, the first worm 214 is fixed to the shaft of the first stepping motor 213, and the first worm 214 meshes with the first rack 212. A first light shield plate 215 is attached to the left side surface 201b of the base 201, and a first photodetector 216 is attached to the left side surface 211b of the Z-axis moving base 211 so as to face the first light shield plate 215. The first light shielding plate 215 and the first photodetector 216 are used to move the Z-axis moving base 211.
Position in the Z-axis direction is detected. This makes the first
When the stepping motor 213 is rotated normally or reversely, the Z-axis moving base 211 can be automatically displaced in the Z-axis direction with respect to the base 201 by the engagement of the first rack 212 and the first worm 214. Of course, the X-axis moving base 221, the Y-axis moving base 231, the θy rotating base 241, the θx rotating base 251, which are stacked on the Z-axis moving base 211,
The θz rotary base 261 and the R reflective liquid crystal light valve 19R for R or the B reflective liquid crystal light valve 19B fixed to the θz rotary base 261 are also integrated with the Z axis moving base 211 and automatically in the Z axis direction. Can be displaced.

Next, in the above X-axis drive section 220, Z
The second rack 222 is attached to the front side surface 211a of the shaft moving base 211 substantially horizontally along the X axis. Further, a second stepping motor 223 is attached to the front side surface 211a of the X-axis moving table 221 provided above the Z-axis moving table 211 substantially horizontally along the X-axis, and further, a second stepping motor 223 is attached to the axis of the second stepping motor 223. The second worm 224 is fixed, and the second worm 224 meshes with the second rack 222. In addition, the Z-axis moving base 211 has a second side on the front side surface 211a.
The light shield plate 225 is attached to the second light shield plate 22.
No. 2 on the front side surface 221a of the X-axis moving base 221 facing the No.
The photodetector 226 is attached to the second light shield plate 2
25 and the second photodetector 226, the X of the X-axis moving base 221
The position in the axial direction is detected. As a result, when the second stepping motor 223 is normally or reversely rotated, the X-axis moving base 221 automatically moves in the X-axis direction with respect to the Z-axis moving base 211 due to the engagement of the second rack 222 and the second worm 224. It can be displaced, and of course, this X-axis moving table 2
21 stacked on the Y-axis moving base 231 and the θy rotary base 2
41, the θx turntable 251, the θz turntable 261, and the θ
The reflective liquid crystal light valve 19R for R or the reflective liquid crystal light valve 19B for B fixed to the z turntable 261 is also X.
It can be automatically displaced in the X-axis direction together with the shaft moving base 221.

Next, in the above Y-axis drive section 230, X
The third rack 232 is attached to the left side surface 221b of the shaft moving base 221 substantially horizontally along the Y axis. Further, a third stepping motor 233 is attached to the left side surface 231b of the Y-axis moving table 231 provided above the X-axis moving table 221 substantially horizontally along the Y-axis, and further, a third stepping motor 233 is attached to the axis of the third stepping motor 233. The third worm 234 is fixed, and the third worm 234 meshes with the third rack 232. In addition, the left side surface 221b of the X-axis moving base 221 has a third
A light shield plate 235 is attached to the third light shield plate 22.
No. 3 on the left side surface 231b of the Y-axis moving base 231 facing the No. 5 side.
The photodetector 236 is attached to the third light shield plate 2
35 and the third photodetector 236, Y of the Y-axis moving base 231
The position in the axial direction is detected. As a result, when the third stepping motor 233 is rotated normally or reversely, the Y-axis moving base 231 automatically moves in the Y-axis direction with respect to the X-axis moving base 221 due to the engagement of the third rack 232 and the third worm 234. It can be displaced, and of course, this Y-axis moving base 2
Θy rotary base 241 and θx rotary base 2 stacked on 31
51, the θz rotary base 261, and the R reflective liquid crystal light valve 19R for R or the B reflective liquid crystal light valve 19B fixed to the θz rotary base 261 are also integrated with the Y-axis moving base 231 in the Y-axis. Can be automatically displaced in any direction.

Next, in the above-mentioned θy drive section 240, Y
A θy rotation base 241 provided above the shaft moving base 231 is divided into two parts, a lower half 241A and an upper half 241B, which are covered with each other, and a surface where the two halves 241A and 241B are butted against each other is arranged along the X-axis direction. Only arcuate cam surface K
Have the same R dimension, and the lower half 241A side is formed in a convex shape and the upper half 241B side is formed in a concave shape. Then, the front side surface 24 of the lower half 241A of the θy turntable 241
A fourth stepping motor 243 is attached to 1Aa substantially horizontally along the X axis, and a fourth worm 244 is fixed to the shaft of the fourth stepping motor 243. In addition, the front side surface 24 of the upper half 241B of the θy rotary base 241 is
A fourth rack 242 is attached to 1Ba substantially horizontally along the X axis, and a fourth worm 244 meshes with the fourth rack 242. At this time, since the rotation range of the upper half 241B of the θy rotation base 241 is very small, even if the fourth rack 242 is mounted substantially horizontally along the X axis, no trouble occurs. In addition, the upper half 24 of the θy rotary base 241
A fourth light blocking plate 245 is attached to the front side surface 241Ba of 1B, and a fourth photodetector 246 is attached to the front side surface 241Aa of the lower half 241A so as to face the fourth light blocking plate 245. The light shield plate 245 and the fourth photodetector 246 allow the θy of the upper half 241B of the θy rotary base 241 to be θ.
The position in the y direction is detected. As a result, when the fourth stepping motor 243 is normally or reversely rotated, the upper half 241B of the θy rotary base 241 is moved along the arcuate cam surface K by the meshing of the fourth rack 242 and the fourth worm 244.
It can be automatically displaced in the θy direction with respect to the lower half 241A of the y rotary base 241 and, of course, the θx rotary base 2 stacked on the upper half 241B of the θy rotary base 241.
51, the θz rotary base 261, and the R reflective liquid crystal light valve 19R for R or the reflective liquid crystal light valve 19B for B fixed to the θz rotary base 261 are also integrated with the upper half 241B and automatically in the θy direction. Can be displaced.

Next, in the above-mentioned θx drive section 250, θ
A θx turntable 251 provided above the y turntable 241 is divided into two parts, a lower half 251A and an upper half 251B, which are covered with each other, and the two half 251A, 251B are abutted against each other in the Y-axis direction. Arc cam surface K only along
Have the same R dimension, and the lower half 251A side is formed in a convex shape and the upper half 251B side is formed in a concave shape. Then, the left side surface 25 of the lower half 251A of the θx turntable 251
A fifth stepping motor 253 is attached to 1Ab substantially horizontally along the Y axis, and a fifth worm 254 is fixed to the shaft of the fifth stepping motor 253. In addition, the left side surface 25 of the upper half 251B of the θx turntable 251
A fifth rack 252 is attached to 1Bb substantially horizontally along the Y axis, and a fifth worm 254 is meshed with the fifth rack 252. At this time, since the turning range of the upper half 251B of the θx turning base 251 is very small, even if the fifth rack 252 is attached substantially horizontally along the Y axis, no trouble occurs. In addition, the upper half 25 of the θx turntable 251
A fifth light shielding plate 255 is attached to the left side surface 251Bb of 1B, and a fifth photodetector 256 is attached to the left side surface 251Ab of the lower half 251A so as to face the fifth light shielding plate 255. The light shield plate 255 and the fifth photodetector 256 make the θ of the upper half 251B of the θx turntable 251.
The position in the x direction is detected. As a result, when the fifth stepping motor 253 is normally or reversely rotated, the fifth rack 252 and the fifth worm 254 mesh with each other so that the upper half 251B of the θx rotary base 251 moves along the arcuate cam surface K by θ.
It can automatically be displaced in the θx direction with respect to the lower half 251A of the x rotary base 251 and, of course, the θz rotary base 2 stacked on the upper half 251B of the θx rotary base 251.
61 and the reflective liquid crystal light valve 19R for R or the reflective liquid crystal light valve 19B for B fixed to the θz rotary base 261 can be automatically displaced in the θy direction together with the upper half 251B.

Next, in the above-mentioned θz driving section 260, θ
x Front surface 251Ba of the upper half 251B of the turntable 251
A sixth rack 262 is mounted on the X-axis substantially horizontally along the X-axis. In addition, the outer peripheral surface 2 of the disk-shaped θz rotary base 261
The sixth stepping motor 223 is attached to the shaft 61a substantially horizontally, and the sixth worm 264 is fixed to the shaft of the sixth stepping motor 263.
64 meshes with the sixth rack 262. At this time, θz
Since the rotation range of the rotation base 261 is very small, even if the sixth rack 262 is attached substantially horizontally along the Y axis, no trouble occurs. Further, the outer peripheral surface 261a of the θz rotary base 261 is
A sixth light shielding plate 265 is attached to the upper half 25 of the θx rotary base 251 facing the sixth light shielding plate 265.
The 6th photodetector 266 is attached to the upper surface 251Bc of 1B, and the 6th photoshield 265 and the 6th photodetector 266 are attached.
And, the position of the θz rotary base 261 in the θz direction is detected. As a result, when the sixth stepping motor 263 is normally or reversely rotated, the θz rotary base 261 is moved to the θx rotary base 251 due to the engagement between the sixth rack 262 and the sixth worm 264.
The upper half 251B can be automatically displaced in the θz direction. Of course, the reflective liquid crystal light valve for R 19R or the reflective liquid crystal light valve for B fixed to the θz rotary base 261 is used. 19B can also be automatically displaced in the θz direction as a unit.

In the application example 6 described above, the Z-axis drive unit 2
10, the X-axis drive unit 220, the Y-axis drive unit 230, the θy drive unit 240, the θx drive unit 250, and the θz drive unit 260 are assembled in the above order, but even if the stacking order of each unit is appropriately changed, It is possible to automatically displace the reflective liquid crystal light valve 19R or the reflective liquid crystal light valve 19B for B in the above six directions.

[0193]

In the projection type display device according to the present invention described in detail above, according to the first aspect, the mounting positions of the remaining two projection display elements are set with respect to one reference projection display element. When adjusting and registering, it is only necessary to install a photo sensor in front of the screen, so if a service person brings a photo sensor,
Registration adjustment can be easily performed at the user's site.

According to the second aspect of the invention, when the registration positions are adjusted by adjusting the mounting positions of the remaining two projection display elements with respect to the one projection display element serving as the reference, the projection is performed in front of the screen. Set the photo sensor in the X-axis direction and / or
Alternatively, since it is only necessary to install it so that it can be displaced in the Y-axis direction, if a service person brings a photosensor X-axis drive unit and a photosensor Y-axis drive unit to which a photosensor is attached, registration adjustment can be performed at the user's end. It can be performed easily and accurately.

According to the third aspect, the effect of the first aspect or the second aspect can be obtained, and in particular, one projection display element projects the adjustment pattern image light of the color light corresponding thereto. When the photosensor receives the color light, a boundary portion is formed between the projected portion where the colored light is projected and the non-projected portion where the colored light is not projected in the adjustment pattern by the adjustment pattern image light of the colored light. Sets the light-receiving surface of the photosensor in a state that the light-receiving surface is roughly divided into two in the X-axis direction and the Y-axis direction, and the remaining two projection display elements correspond to one projection display element and a color light adjustment pattern corresponding thereto. The adjustment pattern image light of each color of the same pattern is projected in a different color from the image light, and the boundary portion in each adjustment pattern by the adjustment pattern image light of each color is projected by one projection display element. One projection display element serving as a reference by displacing the remaining two projection display elements in the X-axis direction and / or the Y-axis direction based on each output value from the photosensor so as to match the case. On the other hand, since the mounting positions of the remaining two projection display elements are adjusted, it is possible to realize registration adjustment with high accuracy and automatically easily in a short time.

According to the fourth aspect, when the mounting positions of the remaining two projection display elements are adjusted with respect to one projection display element serving as a reference to perform registration, at least the remaining two projection display elements are adjusted. Displacement for displacing the remaining two projection display elements in the X-axis direction and / or Y-axis direction by installing temperature sensors in the vicinity of the two projection display elements and corresponding to each output value from the temperature sensor. By providing the memory that stores the direction and the amount of displacement, the mounting positions of the remaining two reflective liquid crystal light valves can be adjusted based on the data stored in the memory without using the photo sensor at the user's end.

According to the fifth aspect, the mounting positions of the remaining two projection display elements with respect to one reference projection display element are set in the X-axis direction and / or the Y-axis direction with a simple structure. It can be automatically displaced or automatically rotated in the XY axis plane.

According to the sixth aspect, in the above-mentioned fifth aspect, the projection display element to be aligned is fixed to one of the X-axis moving table and the Y-axis moving table. Thus, both moving bases can be automatically displaced in the X-axis direction and / or the Y-axis direction.

According to a seventh aspect, in the above-mentioned fifth aspect, in a state where the projection display element to be aligned is fixed to the movable table, the movable table is moved in the X-axis direction via the spring member. It can be automatically displaced in the Y-axis direction.

Further, according to the eighth aspect, the mounting positions of the remaining two projection display elements with respect to one reference projection display element are simple in structure, and the X-axis direction, the Y-axis direction, and the Z-axis. The direction, the θx direction, the θy direction, or the θz direction can be automatically displaced.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an optical configuration of a projection type display device according to the present invention.

2A and 2B are an X-axis drive unit and a Y for automatically displacing the projection display element (reflection type liquid crystal light valve) shown in FIG. 1 in the X-axis direction and / or the Y-axis direction. It is a perspective view for explaining a shaft drive part.

FIG. 3 is a perspective view showing a state in which the R, G, and B polarization beam splitters shown in FIG. 1 are integrally attached to a cross dichroic prism for three-color combining.

FIG. 4 is a block diagram showing a signal processing unit of the first embodiment in a projection display device according to the present invention.

5A to 5C are diagrams showing a state in which a photo sensor installed in the front center portion of the screen detects an X-axis direction adjustment pattern.

6A to 6C are diagrams showing a state in which a photosensor installed in the front center portion of the screen detects a Y-axis direction adjustment pattern.

FIG. 7 is a block diagram showing a signal processing unit of a second embodiment in a projection display device according to the present invention.

8A and 8B are perspective views for explaining an X-axis drive unit and a Y-axis drive unit that displace the photo sensor shown in FIG. 7 in the X-axis direction and / or the Y-axis direction. .

FIG. 9 is a block diagram showing a signal processing unit of a third embodiment in a projection display device according to the present invention.

FIG. 10 shows a reflective liquid crystal light valve for R or B for X
FIG. 11 is a perspective view showing an application example 1 for automatically displacing in the axial direction and / or the Y-axis direction.

FIG. 11 is a reflection type liquid crystal light valve for R or B for X.
FIG. 11 is a perspective view showing an application example 2 for automatically displacing in the axial direction and / or the Y-axis direction.

12A to 12D are schematic plan views for explaining the operation of the application example 2 shown in FIG.

FIG. 13 shows a reflection type liquid crystal light valve for R or B for X
It is the perspective view which showed the modification which partially modified the application example 2 for automatically displacing in an axial direction and / or a Y-axis direction.

14A to 14D are plan views schematically illustrating the operation of a modified example in which the application example 2 illustrated in FIG. 13 is partially modified.

FIG. 15A shows an application example 3 for automatically displacing a reflective liquid crystal light valve for R or B only in the X-axis direction, and FIG. 15B shows a reflective type for R or B. FIG. 11 is a perspective view showing an application example 3 for automatically displacing the liquid crystal light valve only in the Y-axis direction.

16A to 16D are plan views schematically shown to explain the operation of the application example 3 shown in FIG.

FIG. 17 shows a reflection type liquid crystal light valve for R or B for X.
It is a perspective view showing an application example 4 for automatically displacing in the axial direction and / or the Y-axis direction, (a) shows a state in which the light valve XY-axis driving unit is fixed to the polarization beam splitter side, FIG. 6B is a view showing a state where the light valve XY axis drive unit is viewed from below.

18A to 18D are plan views schematically shown to explain the operation of the application example 4 shown in FIG.

FIG. 19 shows a reflection type liquid crystal light valve for R or B in a state in which the reflection type liquid crystal light valve for R or B is attached to the support frame so as to be displaceable in the X axis direction and / or the Y axis direction. FIG. 16 is a perspective view showing a Z-axis direction application example 5, in which (a) shows a state in which the light valve Z-axis drive unit is fixed to the polarization beam splitter side, and (b) shows the light valve Z-axis drive unit from below. It is the figure which showed the state where it was.

20A to 20D are plan views schematically showing the operation of application example 5 shown in FIG.

FIG. 21 shows a reflection type liquid crystal light valve for R or B for X
Axial direction, Y-axis direction, Z-axis direction, θx direction, θy direction, θ
FIG. 21 is a perspective view showing an application example 6 for automatically displacing in the z direction.

FIG. 22 is a schematic view for explaining a conventional device for assembling a display element for a projector.

23 is a perspective view of the position adjusting means and the display element shown in FIG.

[Explanation of symbols]

10 ... Projection display device, 12 ... Light source, 14 ... Cross dichroic mirror, 17 ... Dichroic mirror, 18
R, 18G, 18B ... Polarizing beam splitter, 19R,
19G, 19B ... Projection display element (reflection type liquid crystal light valve), 20 ... Base stand, 21 ... Cross dichroic prism, 22 ... Projection lens, 23 ... Screen, 30
... Light valve X-axis drive unit, 31 ... X-axis moving table, 33 ...
1st stepping motor, 40 ... Light valve Y-axis drive part, 41 ... Y-axis moving stand, 43 ... 2nd stepping motor, 50A-50C ... Signal processing part of 1st-3rd embodiment, 51 ... Microcomputer, 52 ... Video circuit, 52A, 52B
... adjustment pattern signal generator, 52x (52xr, 52
xg, 52xb) ... X-axis direction adjustment pattern signal, 52
y (52yr, 52yg, 52yb) ... Y-axis direction adjustment pattern signal, 53 ... Light valve X-axis drive circuit, 54
... Light valve Y-axis drive circuit, 55 ... Photo sensor, 5
6 ... Photosensor detection circuit, 57 ... A / D converter, 58
... Photo sensor X-axis drive circuit, 59 ... Photo sensor Y-axis drive circuit, 60 ... Temperature sensor, 61 ... Temperature sensor detection circuit, 62 ... A / D converter, 63 ... Memory (ROM), 7
0 ... Base stand, 80 ... Photo sensor X-axis drive section, 81 ...
X-axis moving table, 90 ... Photo sensor Y-axis driving section, 91 ... Y
Axis moving table, 101 ... Base table, 110 ... Light valve X
Axis drive unit, 120 ... Light valve Y-axis drive unit, 111 ...
X-axis moving table, 112 ... First laminated piezoelectric element, 121 ... Y
Axial movement table, 122 ... Second laminated piezoelectric element, 130A, 1
30B ... Light valve XY axis drive section, 131 ... Support frame body, 132 ... Moving base, 132c ... X axis direction pressing piece, 13
2d ... Y-axis direction pressing pieces, 132d1, 132d2 ... First and second Y-axis direction pressing pieces, 133, 134 ... Pair of leaf springs, 140A ... Light valve X-axis driving section, 140B ... Light valve Y-axis driving section, 141 ... Support frame body, 142 ... Moving base, 142f ... Spring support piece and X-axis direction pressing piece, 142
j ... Spring support piece and Y-axis direction pressing piece, 143, 144 ... Pair of leaf springs, 147, 148 ... Pair of leaf springs, 150 ...
Light valve XY axis drive unit 151 ... Support frame body 152
... moving table, 153-155 ... laminated piezoelectric element, 156-
158 ... Compression coil spring, 160 ... Light valve Z-axis drive section, 161 ... Light valve XY-axis drive section, 162 ... Support frame body, 163 ... Support plate, 164 to 166 ... Laminated piezoelectric element, 200 ... Light valve 6-direction drive Section, 201 ... base stand, 210 ... Z-axis drive section, 211 ... Z-axis moving stand, 2
13 ... First stepping motor, 220 ... X-axis drive unit,
221 ... X-axis moving base, 223 ... Second stepping motor, 230 ... Y-axis driving unit, 231 ... Y-axis moving base, 233
… Third stepping motor, 240… θy drive part, 24
1 ... θy turntable, 241A ... lower half, 241B ... upper half, 243 ... fourth stepping motor, 250 ... θx
Drive unit, 251 ... θx turntable, 251A ... lower half, 2
51B ... upper half, 253 ... fifth stepping motor,
260 ... θz drive part, 261 ... θz turntable, 263 ... Sixth stepping motor, K ... Optical axis, L ... Light source light, T1
T5 ... Terminal, XK, YK ... Border part.

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 2H088 EA15 EA16                 5C060 GA01 GA02 GB06 HC11 HC14                       HC21 HC25 JA13 JA20 JB06

Claims (8)

[Claims] 1. Color light obtained by separating light source light from a reading light source into three primary colors of R, G, and B by three-color separating means is made incident on a projection display element of each color, respectively, and Each image displayed on the projection display element is optically modulated with each color light of R, G, B to obtain each color image light, and the image light of each color is optically combined by the three-color combining means. In a projection type display device which projects one color image light obtained on a screen by a projection lens, the mounting positions of the remaining two projection display elements except one reference display element are set in the X-axis direction and / Or Y
Positioning displacement means for axially displacing each of the remaining two projection display elements with respect to the one projection display element, and an adjustment pattern signal for each color for each color. An adjustment pattern signal generator for sequentially applying to the projection display elements of respective colors while changing the X-axis direction and the Y-axis direction in the same pattern, and when adjusting the mounting positions of the remaining two projection display elements. A terminal for inputting the output of the photosensor installed in front of the screen, and the adjustment pattern image light of each color corresponding to the adjustment pattern signal of each color sequentially applied to the projection display element of each color is sequentially applied by the photosensor. And a detector that receives each output from the photosensor through the terminal and detects each output value. Type display device. 2. Color light obtained by decomposing light source light from a reading light source into three primary colors of R, G, and B by a three-color separation means is made incident on a projection display element of each color, respectively, and Each image displayed on the projection display element is optically modulated with each color light of R, G, B to obtain each color image light, and the image light of each color is optically combined by the three-color combining means. In a projection type display device that projects one color image light obtained on a screen by a projection lens, the mounting positions of the remaining two projection display elements except for one reference display element serving as a reference are set in the X-axis direction and / Or Y
A first positioning displacement means for axially displacing each of the remaining two projection display elements with respect to the one projection display element, and an adjustment pattern signal of each color for each color. A pattern signal generator for adjustment, which is sequentially applied to the projection display elements of the respective colors in the same uniform pattern, and a photo installed in front of the screen when adjusting the mounting positions of the remaining two projection display elements. A first terminal for inputting an output of the sensor; a second terminal for outputting a drive signal to a second positioning displacement means for displacing the photosensor in the X-axis direction and / or the Y-axis direction of the screen; The photosensor sequentially receives the adjustment pattern image light of each color corresponding to the adjustment pattern signal of each color sequentially applied to the projection display element of each color, and, A projection type display device comprising: a detection unit that detects each output value when each output from the photo sensor is input through the first terminal. 3. The projection type display device according to claim 1, wherein the one projection display element projects an adjustment pattern image light of color light corresponding to the projection display element and the photosensor receives the adjustment pattern image light. An adjustment pattern of the color light, a boundary portion is formed between a projection portion that projects the color light and a non-projection portion that does not illuminate the adjustment pattern by the image light, and the light receiving surface of the photosensor at the boundary portion. Is set in a state in which it is divided into approximately two in the X-axis direction and the Y-axis direction, and the remaining 2
One projection display element projects the adjustment pattern image light of each color of the same pattern with a different color from the adjustment pattern image light of the color light corresponding to the one projection display element,
Based on each output value from the photosensor, the remaining two are adjusted so that the boundary portion in each adjustment pattern by the adjustment pattern image light of each color matches the case where the image is projected by the one projection display element. A projection type display device characterized in that two projection display elements are respectively displaced in the X-axis direction and / or the Y-axis direction. 4. The color lights obtained by separating the light source light from the reading light source into the three primary colors R, G, B by the three-color separating means are made incident on the projection display elements of the respective colors, and the respective color lights of the respective colors are made incident. Each image displayed on the projection display element is optically modulated with each color light of R, G, B to obtain each color image light, and the image light of each color is optically combined by the three-color combining means. In a projection type display device that projects one color image light obtained on a screen by a projection lens, the mounting positions of the remaining two projection display elements except for one reference display element serving as a reference are set in the X-axis direction and / Or Y
Positioning displacement means for axially displacing each of the remaining two projection display elements with respect to the one projection display element, and at least the remaining two projection display elements Temperature sensors respectively installed in the vicinity of, the detection means for detecting the output value of the temperature sensor, the temperature in the vicinity of the temperature sensor is changed, the remaining value corresponding to each output value from the temperature sensor A projection-type display device, comprising: a memory that stores a displacement direction and a displacement amount for displacing two projection display elements in the X-axis direction and / or the Y-axis direction. 5. Each color light obtained by separating the light source light from the reading light source into three primary colors of R, G, and B by the three-color separation means is made incident on the projection display element of each color, respectively, and Each image displayed on the projection display element is optically modulated with each color light of R, G, B to obtain each color image light, and the image light of each color is optically combined by the three-color combining means. In a projection type display device which projects one color image light obtained on a screen by a projection lens, the mounting positions of the remaining two projection display elements except one reference display element are set in the X-axis direction and / Or Y
In order to align each of the remaining two projection display elements with respect to the one projection display element by automatically displacing in the axial direction or automatically rotating in the XY axis plane. A projection-type display device, which is provided with a displacement means for position alignment. 6. The projection type display device according to claim 5, wherein the alignment displacement means places the projection display element to be aligned on one of the X-axis moving table and the Y-axis moving table. A fixing member that displaceably supports both moving bases in a fixed state, a first driving unit for automatically displacing the X-axis moving base in the X-axis direction, and a Y-axis moving base for the Y-axis moving base. A projection type display device, comprising: a second drive means for automatically displacing in a direction. 7. The projection type display apparatus according to claim 5, wherein the positioning displacement means includes a fixed member that displaceably supports a movable table to which a projection display element to be aligned is fixed, and the movable member. Between the base and the fixing member,
A spring member that is elastically displaced in the X-axis direction and / or the Y-axis direction; and a first member for automatically displacing the movable base in the X-axis direction by pressing the movable base in the X-axis direction by the spring member. One pressing drive means and a second pressing drive means for pressing the movable table in the Y-axis direction and automatically displacing the movable table in the Y-axis direction by the spring member. Projection type display device. 8. Each color light obtained by separating the light source light from the reading light source into three primary colors of R, G, B by the three-color separation means is made incident on the projection display element of each color, respectively, and Each image displayed on the projection display element is optically modulated with each color light of R, G, B to obtain each color image light, and the image light of each color is optically combined by the three-color combining means. In a projection type display device which projects one obtained color image light on a screen by a projection lens, the mounting positions of the remaining two projection display elements excluding one projection display element serving as a reference are set in the X-axis direction, Y-axis direction,
To automatically displace in any one of the Z-axis direction, the θx direction, the θy direction, and the θz direction to align each of the remaining two projection display elements with the one projection display element. A projection-type display device, which is provided with a displacement means for position alignment.