JP2006010993A - Light valve pixel adjustment device and pixel alignment method of projection display device using the same. - Google Patents

Abstract

An object of the present invention is to provide a light valve pixel adjustment device that holds a light valve without deformation and adjusts the pixel, and a pixel alignment method of a projection display device using the light valve pixel adjustment device.
A first holding member in contact with a side surface and a back surface of a light valve, a second holding member in contact with another side surface opposite to the side surface of the light valve in contact with the first holding member and a back surface, 2 The holding member is moved to a position in contact with the light valve with a screw member that moves in parallel with the other side surface, and the light valve is held by the light valve holding member that presses the second holding member against the light valve with an elastic body. A light valve pixel adjustment device having an actuator that fixes a pixel of a light valve with a holding member fixed.
[Selection] Figure 3

Description

  The present invention relates to a light valve pixel adjustment device and a pixel alignment method of a projection display device using the same.

Conventionally, projection display that separates the light from the light source into red, green and blue light, modulates each color light with a light valve arranged for each color light, and synthesizes the color image after color synthesis The device is known. In this projection type display device, in order to adjust the color shift of red, green and blue, that is, the shift of the position of each pixel of the light valve for each color light, the light valve is fixed to the actuator with a screw, and the light valve with the actuator There are known methods for adjusting the position of.
JP 2001-21468 A

However, if the light valve is fixed to the actuator with a screw, the light valve will be deformed, and even if pixel alignment of the light valve is performed in this state, if the screw is removed after pixel alignment is completed, the deformation of the light valve will be restored. There was a problem that a shift would occur.

  It is an object of the present invention to provide a light valve pixel adjustment device that holds a light valve without deformation and adjusts a pixel, and a pixel alignment method for a projection display device using the light valve pixel adjustment device.

  In order to solve the above-described problem, the light valve pixel adjustment device according to claim 1 includes a first holding member in contact with a side surface and a back surface of the light valve, another side surface facing the side surface of the light valve, and the A light valve holding member comprising: a second holding member that contacts a back surface; a screw member that moves the second holding member in parallel with the other side surface; and an elastic body that presses the second holding member against the light valve; The light valve holding member is fixed, and has an actuator for aligning pixels of the light valve.

  The light valve pixel adjustment device according to claim 2 is the light valve pixel adjustment device according to claim 1, further comprising a guide member that guides the second holding member in a direction of movement of the screw member. .

  The light valve pixel adjusting device according to claim 3 is the light valve pixel adjusting device according to claim 1 or 2, wherein the elastic member surrounds the screw member, and the second holding member is the light valve. It is a spring member that is pressed against the head.

  The light valve pixel adjustment device according to claim 4 is the light valve pixel adjustment device according to claim 1 or 2, wherein the elastic member surrounds the screw member, and the second holding member is the light valve. A first spring member that presses against the light valve, and a second spring member that is disposed adjacent to the first spring member and presses the second holding member against the light valve.

  The light valve pixel adjustment device according to claim 5 is the light valve pixel adjustment device according to any one of claims 1 to 4, wherein the light valve is a reflective light valve. .

  According to a sixth aspect of the present invention, there is provided a method for aligning pixels of a projection display device, wherein the light valve pixel adjustment device according to any one of the first to fifth aspects holds a light valve, Color-separated into color light, the color-separated light is incident on a light valve arranged for each of the plurality of colors, and is arranged for each of the plurality of color lights from a light valve arranged for each of the plurality of color lights A chart for adjusting the position of the pixel of the light valve is emitted, the chart emitted from the light valve arranged for each of the plurality of color lights is projected on a screen by a projection lens, and arranged for each of the plurality of color lights by the actuator The light valve pixels are aligned, the light valve is fixed to the polarization beam splitter, and the light valve is removed from the light valve holder. To.

  The pixel alignment method of the projection display device according to claim 7 is the pixel alignment method of the projection display device according to claim 6, wherein light from the light source is red (R) light, green (G) light, blue (B) Color separation into three colors of light.

  The present invention provides a light valve pixel adjustment device that holds a light valve without deformation and adjusts the pixel, and a pixel alignment method for a projection display device using the light valve pixel adjustment device.

The best mode for carrying out the present invention will be described below with reference to the drawings.
FIG. 1 shows a configuration diagram of a projection display device according to the present embodiment. Light emitted from the light source 11 composed of a lamp and a concave mirror is converted into polarized light having a vibration direction in a direction perpendicular to the paper surface by the polarization conversion illumination optical system 12. The polarization conversion illumination device 12 includes a first lens plate in which a plurality of lenses (not shown) are arranged in a matrix shape, a second lens plate in which lenses are similarly arranged substantially at the focal position of each lens of the first lens plate, and a second lens plate. Near the exit surface of the lens plate, a plurality of prism members in which a combination of a polarization separation portion and a reflection layer arranged in parallel with the polarization separation portion is arranged in an array, and a ½ wavelength disposed at a specific position on the exit surface It comprises a phase plate and a condenser lens that superimposes and illuminates on a reflection type light valve described later. In this embodiment, the half-wave phase plate is disposed at a position where the oscillation direction of the emitted polarized light is perpendicular to the paper surface.

The light emitted from the polarization conversion illumination device 12 reflects B (blue) light, reflects R (red) light and G (green) light, dichroic mirror 13B, reflects R light and G light, and transmits B light. The dichroic mirror 13RG is incident on a cross dichroic mirror 13 arranged orthogonal to each other, and is separated into B light that is perpendicular to the incident light and travels in opposite directions, and mixed light of R light and G light. .
The color-separated B light is reflected by the deflecting mirror 14 and enters the polarization beam splitter 17B arranged for the B light. The B light incident on the polarization beam splitter 17B is reflected by the polarization separation unit and is incident on the reflection light valve 18B for B light.
On the other hand, the mixed light of the color-separated R light and G light is reflected by the deflecting mirror 15 and is incident on and reflected by the dichroic mirror 16 having G light reflection and R light transmission characteristics. Color separation into light. The color-separated G light and R light enter the polarization beam splitters 17G and 17R, respectively, are reflected by the polarization separation unit, and enter the reflection type light valves 18G and 18B, respectively.
The polarization beam splitters 17B, 17G, and 17R and the reflection type light valves 18B, 18G, and 18R are integrated using the integrated members 30B, 30G, and 30R, respectively. The image forming surfaces of the reflective light valves 18B, 18G, and 18R for each color light have a configuration in which a large number of pixels are arranged in a matrix shape.

  Each color light incident on the reflective light valves 18B, 18G, and 18R arranged for each color light is modulated by the respective color signals, and reflects and emits mixed light of modulated light and non-modulated light. The reflected and emitted light again enters the polarization beam splitters 17B, 17G, and 17R, and the modulated light transmitted through the polarization separation unit is separated as the analysis light.

The polarization beam splitters 17B, 17G, and 17R are integrated with the cross dichroic prism 20 for color synthesis and integrated members 19B, 19G, and 19R. The integrated members 19B, 19G, and 19R are constituted by optical path length correcting prism members.
Inside the cross dichroic prism 20, a dichroic film 20R that reflects R light and a dichroic film 20B that reflects B light are arranged orthogonally. The R light and B light incident on the cross dichroic prism 20 are reflected by the R light reflecting dichroic film 20R and the B light reflecting dichroic film 20B, respectively, and the G light is color-synthesized by passing through both dichroic films, and the combined light is Inject from the exit surface. The color-synthesized light is incident on the projection lens 21 integrated with the lower surface of the cross dichroic prism 20 by the integration member 22 and is projected on a screen (not shown).

  FIG. 2 shows an integrated member 30G structure that integrates the G-light reflective light valve 18G and the polarizing beam splitter 17G. Cooling fins 18G-F are attached to the back surface of the reflective light valve 18G for G light. The integrated member 30G includes a first integrated member 31 that holds the reflective light valve 18G for G light, and a second integrated member 33 that is attached to the G light polarizing beam splitter 17G. Although only the G light integrated member 30G is shown, the R light and B light integrated members 30R and 30B have the same configuration, and illustration and description thereof are omitted.

The first integrated member 31 and the second integrated member 33 are each formed by processing a metal plate member. An opening is provided in the central portion of the second integrated member 33 to allow light to pass through. At the top and bottom of the opening, mounting portions 333U and 333L are provided in the direction perpendicular to the second integrated member 33, with the top and bottom surfaces of the polarizing beam splitter 17G being sandwiched and attached. At the upper end and the lower end of the second integrated member 33, there are provided mounting portions 331U and 331L for the first integrated member 31 that is soldered and coupled to the first integrated member 31.
An opening for transmitting light is formed at the center of the first integrated member 31, and the reflection light valve 18G for G light is arranged so that the entire image forming portion is disposed inside the opening. 1 It is attached to the integral member 31. At the upper end and the lower end of the first integrated member 31, mounting portions 311U and 311L are formed to be joined to the mounting portions 331U and 331L with the second integrated member 33 that is inclined from the opening surface.

  A method for joining the first integrated member 31 and the second integrated member 32 will be described. First, the second integrated member 33 is attached to the polarization beam splitter 17G by attaching the upper and lower surfaces of the polarization beam splitter 17G between the attachment portions 333U and 333L and bonding them. Next, the first mounting member 31 to which the reflection type light valve 18G is mounted is brought close to the second mounting member 33 bonded to the polarizing beam splitter 17G. The reflection type light valve 18G is held by an actuator 111, which will be described later, and uses the actuator 111 to temporarily fix the attachment portions 311U and 311L close to the attachment portions 331U and 331L of the second attachment member 33, respectively. Thereafter, the reflective light valves 18G, 18B, and 18R for each color are aligned, and the first mounting member 31 and the second mounting member 33 are soldered and fixed.

  Next, a method for holding the reflective light valve 18G by the actuator 111 will be described. FIG. 3 shows a perspective view of the actuator 111 and the holding member 101 mounted thereon. The reflective light valves for each color light are similarly held. FIG. 4 is a perspective view of the holding member 101. On the floor member 104 to be attached to the actuator 111 of the holding member 101, a holding member 102 </ b> A that holds a part of one side surface and the back surface of the light valve is vertically attached to the floor member 104. The holding member 102A is fixed to the floor member 104 and does not move. An L-shaped holding portion 102A-C is formed over a predetermined length above the holding member 102A, and the side and bottom surfaces of the reflective light valve 18G are held by the holding portion 102A-C. Further, a slide member 107 and a guide member 108 of the slide member 107 are attached on the floor member 104. The guide member 108 is fixed to the floor member 104, and the slide member 107 is movable along the guide member 108 in the X-axis direction in FIG. By applying a force in the X-axis direction to the slide member 107, the slide member 107 moves in the X-axis direction.

  The slide member 107 is provided with a holding member 102B that holds a part of the back surface of the reflective light valve 18 that is different from the side that the member 102A holds and a part of the back surface. An L-shaped holding portion 102B-C is formed on the upper portion of the holding member 102B over a predetermined distance in the same manner as the member 102A. The surfaces of the holding members 102A and 102B that are in contact with the rear surfaces of the light valves of the holding portions 102A-C and 102B-C are parallel to the XZ plane.

  A screw hole penetrating in the X-axis direction is formed in the slide member 107, and the screw 105 </ b> A disposed at the tip of the position adjusting rotation member 105 enters the screw hole of the slide member 107. The screw 105A at the tip of the position adjusting rotary member 105 is in the coil spring member 105B, and the coil spring member 105B is sandwiched between the rotating portion 105C of the position adjusting rotary member 105 and the slide member 107. The coil spring member 105B presses the slide member 107 in the plus direction of the X axis. In the vicinity of the exit of the screw hole of the slide member 107, a fixing member 103 that defines the forward position of the tip of the screw 105A is disposed.

  When the rotation member 105C of the position adjustment rotation member 105 is rotated, the slide member 107 moves depending on the rotation direction, so that the holding member 102B can be moved in the plus direction or minus direction of the X axis. A spring holding member 106 is attached to a side surface of the floor member 104 in a direction perpendicular to the floor member 104. A coil spring 106A is arranged between the spring holding member 106 and the slide member 107 in a direction parallel to the screw 105A. The parallel movement of the slide member 107 in the X-axis direction is ensured by the coil spring 106A. The spring holding member 106 and the coil spring 106A are not shown in the drawings other than FIG.

  Next, a method for holding the reflective light valve 18G with the holding member 101 will be described. FIG. 5 shows a view in which the reflective light valve 18G is held by the holding member 101. FIG. A flexible electric board 18G-C is attached to the reflective light valve 18G. Electric wiring for operating the reflective light valve 18G is formed on the flexible electric substrate 18G-C. Cooling fins 18G-F are disposed on the back surface of the reflective light valve 18G to cool the reflective light valve 18G.

  First, the reflection type light valve 18G in which the cooling fins 18G-F are arranged on the back surface is arranged with the cooling fins 18G-F facing the holding member 101. Next, one side surface of the reflection type light valve 18G and the cooling fin 18G-F on the back surface are arranged so as to be in contact with the respective surfaces of the L-shaped holding portions 102A-C. In this state, the rotating portion 105C of the position adjusting rotating member 105 is rotated to move the holding member 102B in the plus direction of the X axis, and the holding portion 102B-C is used for cooling the other side surface and the back surface of the reflective light valve 18G. The reflective light valve 18G is sandwiched and held between the holding portions 102A-C and the holding portions 102B-C by pressing against the fins 18G-F. Since the holding member 102B is pressed by the optimum stress in the X-axis direction by the coil springs 105B and 106A, the reflective light valve 18G will not be deformed, and will not loosen from the holding member.

  Next, a method for holding the reflective light valve for each color light by the holding member 101 and aligning the pixels of the reflective light valve for each color light will be described. FIG. 6 shows a configuration in which a pixel adjustment chart is projected onto the screen SC from an optical engine in which the reflection light valve for each color light is held by the holding member 101 on the actuator 111. The holding members 101R, 101G, and 101B are attached to the actuators 111R, 111G, and 111B, respectively, and the reflection type light valves 18R, 18G, and 18B are attached to the holding members 101R, 101G, and 101B in the configuration described above. ing. The light source and the color separation optical system are disposed on the floor member 201.

  First, G light pixel adjustment charts are projected onto at least three locations in the center and the periphery of the screen SC. Next, the R light pixel adjustment chart is projected onto the same area where the G light chart of the screen SC is projected. In the G light pixel adjustment chart and the R light pixel adjustment chart, the G light actuator so that the pixels of the G light reflection type light valve 18G and the R light reflection type light valve 18R coincide with each other. The G light reflection type light valve 18G and the R light reflection type light valve 18R are made to coincide with each other by moving the 111G and R light actuators 111R. Next, the B light pixel adjustment chart is projected onto the same area of the screen SC as the G light and R light charts. The B light actuator 111B is moved so that the pixel position of the B light reflection type light valve 18B is matched with the G light and R light pixels.

After aligning the pixels of the light valves 18G, 18R, and 18G for each color light, the attachment portions 311U and 311L of the first integrated member 31 for each color light, and the attachment portions 331U and 331L portions of the second integrated member 33 Solder and fix each.
Rotating member of position adjusting rotating member 105 holding reflecting light valves 18G, 18R, 18B for each color light after the positions of reflecting light valves 18G, 18R, 18B for each color light are adjusted and fixed By rotating 105C and moving the slide member 107 in the negative direction of the X axis, the holding member 102B can be easily removed from the reflective light valve. Accordingly, the holding member 102B can be easily detached from the reflective light valve without causing a pixel shift of the reflective light valve.

  An optical engine having the projection lens 21, the cross dichroic prism 20, the polarization beam splitters 17R, 17G, and 17B for each color light, and the light valves 18R, 18G, and 18B adjusted in the above-described steps is taken out from the pixel adjustment device and projected. By assembling as a device, a projection display device in which pixel alignment is achieved can be made.

  In the present embodiment, an optical engine including a projection lens 21, a cross dichroic prism 20, polarization beam splitters 17R, 17G, and 17B for each color light, and light valves 18R, 18G, and 18B is added to a pixel adjustment device having a light source and a color separation optical system. In the above description, the pixel alignment method is described. However, the pixel alignment may be performed using the light source and the color separation optical system of the projection display device main body as they are. In this case, three holes for each color are provided in the floor member constituting the casing of the projection display device through which the holding member 101 holding the reflection type light valve can pass. The holding members 102A and 102B of the holding member 101 attached to the actuator are inserted into the housing of the projection display device through the holes, and the pixels of the reflective light valve for each color light are aligned by the method described in the present embodiment. . After pixel matching, close the hole in the floor member. In the case of a structure in which the ceiling part of the housing can be removed, the ceiling part may be removed without inserting a hole in the floor member, and the holding member 101 may be inserted from the ceiling direction.

  In the present embodiment, the projection display device using the reflection type light valve has been described. However, the present invention is not limited to this, and the pixel alignment of the light valve for each color light of the projection type display device using the transmission type light valve is performed. Can be used as well.

Configuration diagram of a projection display device The perspective view which shows the structure of the integration of a projection lens, a color synthetic | combination optical system, a polarization beam splitter, and a reflection type light valve. Perspective view of light valve holding member fixed to actuator Perspective view of light valve holding member A perspective view of the light valve holding member holding the light valve The block diagram which projects a chart on a screen with a pixel adjustment apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Light source 12 Polarization conversion illumination apparatus 13 Cross dichroic mirrors 14 and 15 Deflection mirror 16 Dichroic mirrors 17B, 17G, and 17R Polarization beam splitters 18B, 18G, and 18R Reflective type light valves 19B, 19G, and 19R Integrated member 20 Cross dichroic prism 21 Projection Lens 22 Projection lens and cross dichroic prism integrated member 31 First integrated member 33 Second integrated member 101 Holding member 102A, 102B Holding member 103 Fixing member 104 Floor member 105 Position adjustment rotating member 105A Screw 105B, 106A Coil spring 106 Spring holding member 107 Slide member 111 Actuator

Claims (7)

A first holding member in contact with a side surface and a back surface of the light valve;
A second holding member in contact with the other side surface of the light valve facing the side surface and the back surface; a screw member for moving the second holding member in parallel with the other side surface; and the second holding member as the light valve. The light valve holding member comprising an elastic body pressed against
A light valve pixel adjustment device comprising: an actuator for fixing the light valve holding member and performing pixel alignment of the light valve. The light valve pixel adjustment device according to claim 1, further comprising a guide member that guides the second holding member in a direction of movement of the screw member. The light valve pixel adjustment device according to claim 1, wherein the elastic member is a spring member that surrounds the screw member and presses the second holding member against the light valve. The elastic member surrounds the screw member and is disposed adjacent to the first spring member that presses the second holding member against the light valve, and presses the second holding member against the light valve. The light valve pixel adjustment device according to claim 1, further comprising a second spring member. The light valve pixel adjustment device according to any one of claims 1 to 4, wherein the light valve is a reflective light valve. A light valve is held by the light valve pixel adjustment device according to any one of claims 1 to 5,
Separates the light from the light source into multiple colored lights,
The color-separated light is incident on a light valve arranged for each of the plurality of colors,
Injecting a chart for adjusting the position of the pixel of the light valve disposed for each of the plurality of color lights from the light valve disposed for each of the plurality of color lights,
Projecting a chart emitted from a light valve arranged for each of the plurality of color lights onto a screen with a projection lens,
Align the light valve pixels arranged for each of the plurality of color lights with the actuator,
Fixing the light valve to the polarizing beam splitter;
The pixel alignment method of a projection type display apparatus, wherein the light valve is removed from the light valve holder. 7. The pixel alignment method for a projection display device according to claim 6, wherein the light from the light source is color-separated into three colors of red (R) light, green (G) light, and blue (B) light. A pixel alignment method for a projection display device.