JP2010091594A - Projector device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a projector device advantageous in terms of improvement of productivity by achieving simplification of operation. <P>SOLUTION: The projector device includes a separation part 14 for separating light from a light source 12 to light beams of three wavelengths different from each other. The separation part 14 includes a base 24, first and second dichroic mirrors 26 and 28, first and second reflection mirrors 30 and 32, and mirror holding members 34. The mirror holding members 34 respectively hold the first and second reflection mirrors 30 and 32 on a surface 2402 of the base 24, and supported to be rotatable around an axial line L orthogonal to a thickness direction of the base 24 and movable on the surface 2402 of the base 24. Inclined surfaces 4002 of two engaging piece parts 40 provided in the mirror holding member 34 are engaged with an inclined surface 5210 of an adjusting implement 50 and move the adjusting implement 50, whereby angle adjustment and position adjustment of the first and second reflection mirrors 30 and 32 are performed. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a projector apparatus.

Conventionally, a light source, a separation unit that separates light from the light source into light of three different wavelengths of red (R), green (G), and blue (B), and each of the light separated by the separation unit A projector apparatus including three spatial modulators (liquid crystal panels) that modulates according to image information is provided (Patent Document 1).
In such a projector device, in a state where the device is simply assembled, illumination light (light separated into three parts) emitted from the light source due to molding tolerances of components constituting the separation unit is uniformly liquid crystal The panel effective screen may not be illuminated.
Therefore, it is necessary to adjust the illumination range so that each illumination light uniformly irradiates the liquid crystal panel of each channel of R, G, and B. Specifically, the R, G, and B of the separation unit are adjusted. The angle of the reflecting mirror that forms the optical path is adjusted.
JP-A-2005-274734

However, conventionally, the adjustment of the illumination range has been performed by manually adjusting the position of the mirror holding member that holds the reflecting mirror with respect to the base, which makes the adjustment work complicated and disadvantageous in improving productivity. was there.
The present invention has been made in view of such circumstances, and an object of the present invention is to provide a projector device that is advantageous in simplifying work and improving productivity.

In order to achieve the above-described object, a projector device according to an embodiment of the present invention provides an image of a light source, a separation unit that separates light from the light source into light having three different wavelengths, and light separated by the separation unit. Three spatial modulators that modulate according to information, and the separation unit separates the plate-like base, a plurality of light separation means for separating the light into two different wavelength bands, and the light separation means A plurality of reflecting mirrors for reflecting the reflected light, and holding at least one of the plurality of reflecting mirrors on the surface of the base, and rotatable about an axis perpendicular to the thickness direction of the base and A mirror holding member supported movably on the surface of the base, wherein the mirror holding member is a substrate portion, an upright piece portion that is erected from the substrate portion and to which the reflection mirror is attached, and Two engaging pieces projecting in opposite directions to the upstanding pieces from two spaced apart portions of the plate, and the base is attached to the base in the state where the base is attached to the base Engagement piece holes that allow the two engagement pieces to protrude from the back surface of the base are provided with a size that allows the mirror holding member to move on the surface of the base, and through the engagement piece holes. An inclined surface is formed at the location of the two engaging piece portions projecting from the back surface so that the distance from each other gradually approaches as the distance from the substrate portion increases.
The projector device of the present invention includes a light source, a separation unit that separates light from the light source into light of three different wavelengths, and three spaces that modulate each of the light separated by the separation unit according to image information. A modulator, and the separation unit includes a plate-like base, a plurality of dichroic mirrors that separate the light into two different wavelength bands, and a plurality of reflection mirrors that reflect the light separated by the dichroic mirror Holding at least one of the plurality of dichroic mirrors and the plurality of reflection mirrors on the surface of the base, and rotatable about an axis perpendicular to the thickness direction of the base and on the surface of the base A mirror holding member that is movably supported by the substrate, the mirror holding member standing up from the substrate portion and An upright piece portion to which the ic mirror or the reflection mirror is attached, and two engaging piece portions projecting in opposite directions from the upright piece portion from two spaced apart positions of the substrate portion. An engagement piece portion hole for projecting the two engagement piece portions from the back surface of the base in a state where the substrate portion is attached to the base, and the mirror holding member is on the surface of the base. Provided at a position where the two engaging pieces project from the back surface through the engaging piece hole, and the inclined surfaces gradually approach each other as the distance from the substrate portion increases. Is formed.

According to the present invention, it is possible to adjust the angle and position of the reflecting mirror using the inclined surfaces of the two engaging pieces provided on the mirror holding member that holds the reflecting mirror.
Therefore, the illumination range can be easily and reliably adjusted, which is advantageous in simplifying the work and improving productivity.

Next, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an explanatory diagram showing the configuration of the projector device 10 according to the present embodiment, FIG. 2 is a side view of the first and second reflecting mirrors 30 and 32 assembled to the base 24, and FIG. FIG.
As shown in FIG. 1, the projector device 10 includes a light source 12, a separation unit 14, first, second, and third polarization beam splitters 16 </ b> R, 16 </ b> G, and 16 </ b> B, and first, second, and third reflective spaces. Modulators 18R, 18G, and 18B are included. Further, the projector device 10 includes a light combining unit 20 and a projection lens 22.
The projector device 10 includes a frame 23, and on the frame 23, a separation unit 14, first, second, and third polarizing beam splitters 16 </ b> R, 16 </ b> G, and 16 </ b> B, and first, second, and third reflective spatial modulations. The devices 18R, 18G, and 18B and the photosynthesis unit 20 are assembled.

(Light source 12)
The light source 12 includes a lamp that emits white light.
Various known lamps such as an ultra high pressure lamp that emits white light are used as the lamp.
In front of the lamp 12A, an optical member 12B such as a UV-IR cut filter for removing ultraviolet rays and infrared rays from the light from the lamp 12A and a polarization conversion element for aligning the polarization direction of the light from the lamp 12A in one direction is provided. Yes.

(Separator 14)
The separation unit 14 separates light from the light source 12 into light of three different wavelengths, that is, red, green, and blue light, and guides them to the first, second, and third polarization beam splitters 16R, 16G, and 16B. Is.
In the present embodiment, the separation unit 14 includes a base 24, first and second dichroic mirrors 26 and 28, first and second reflection mirrors 30 and 32, and a mirror holding member 34.
As shown in FIGS. 2 and 3, the base 24 has a plate shape, and one surface in the thickness direction is a front surface 2402, and the other surface is a back surface 2404. In the present embodiment, the base 24 includes a frame 23.

The first and second dichroic mirrors 26 and 28 respectively constitute light separating means for separating light from the light source 12 into two different wavelength bands.
The first dichroic mirror 26 separates the light R in the red wavelength region and the light in the green G and blue B wavelength regions from the light guided from the light source 12.
The first reflecting mirror 30 reflects the light R in the red wavelength region separated by the first dichroic mirror 26 and guides it to the first polarizing beam splitter 16R.
The second reflection mirror 32 reflects light in the green and blue wavelength regions separated by the first dichroic mirror 26.
The second dichroic mirror 28 reflects only the light G in the green wavelength region out of the light in the green and blue wavelength regions reflected by the second reflection mirror 32 and guides it to the second polarizing beam splitter 16G, and also reflects the blue wavelength. The light B in the region is transmitted and guided to the third polarizing beam splitter 16B.
The separator 14 only needs to be able to separate light from the light source 12 into red, green, and blue light, and is not limited to the above-described configuration, and various conventionally known configurations can be employed.

(Mirror holding member 34)
In the present embodiment, as shown in FIG. 1, two mirror holding members 34 are provided for holding the first reflecting mirror 30 and for holding the second reflecting mirror 32.
As shown in FIGS. 2 and 3, each mirror holding member 34 holds the first and second reflecting mirrors 30 and 32 on the surface 2402 of the base 24, and an axis L perpendicular to the thickness direction of the base 24. It is supported so as to be rotatable around and movable on a surface 2402 of the base 24.
4 is a plan view of the mirror holding member 34, and FIG. 5 is a side view of the mirror holding member 34 to which the first and second reflecting mirrors 30 and 32 are attached.
As shown in FIGS. 4 and 5, the mirror holding member 34 includes a substrate portion 36, an upright piece portion 38, and two engagement piece portions 40.

As shown in FIG. 4, the substrate portion 36 has a width and a length smaller than the width, and a long hole 3602 extending in the length direction is formed through the middle in the width direction.
Further, two screw insertion holes 3604 through which screws N (FIG. 1) to be described later are inserted at equal intervals with the long holes 3602 are formed in the substrate portion 36 so as to penetrate the two portions sandwiching the long holes 3602 in the width direction. ing.
The screw insertion hole 3604 is provided in such a size that the mirror holding member 34 can be moved on the surface 2402 of the base 24 in a state where the screw N is inserted through the screw insertion hole 3604.
Further, as shown in FIG. 5, an annular abutting surface 3610 that bulges on one side in the thickness direction of the substrate portion 36 (on the side opposite to the standing piece portion 38) is formed around the long hole 3602. Yes.

As shown in FIGS. 2 and 3, the upright piece 38 is erected from the base plate 36 and the first and second reflecting mirrors 30 and 32 are attached thereto.
In the present embodiment, the upright piece 38 is erected from three locations, one side in the length direction of the substrate portion 36, a location near both ends of the one side, and an intermediate location on one side.

The two engaging piece portions 40 protrude from the two portions of the base plate portion 36 spaced from each other in the direction opposite to the standing piece portion 38.
More specifically, the two engaging piece portions 40 are provided at the base plate portion 36 at the first and second reflecting mirrors 30, which are perpendicular to the direction in which the standing piece portion 38 stands. 32 at both ends in the width direction.
As shown in FIG. 2, the engagement piece portion hole for projecting the two engagement piece portions 40 from the back surface 2404 opposite to the front surface 2402 of the base 24 in a state where the base plate portion 36 is attached to the base 24. 2410 is provided in such a size that the mirror holding member 34 can be moved on the surface 2402 of the base 24.
An inclined surface 4002 is formed at two engagement piece portions 40 projecting from the back surface 2404 through the engagement piece portion holes 2410 and gradually approaching each other as the distance from the substrate portion 36 increases.

As shown in FIGS. 2 and 3, the pin 42 protrudes from the base 24, and the pin 42 is inserted into the elongated hole 3602 so that the mirror holding member 36 rotates around the axis L around the pin 42. Supported as possible.
In addition, screw holes (not shown) are formed at locations of the base 24 corresponding to the two screw insertion holes 3604 of the substrate portion 36, respectively. As shown in FIG. 1, the two screws N are inserted through the two screw insertion holes 3604 and screwed into the screw holes, whereby the mirror holding member 34 is fixed to the base 24.

(Reflection type spatial modulators 18R, 18G, 18B)
The first, second, and third reflective spatial modulators 18R, 18G, and 18B are provided for the first, second, and third polarizing beam splitters 16R, 16G, and 16B, and are respectively provided by the polarizing beam splitters 16R, 16G, and 16B. The reflected light is modulated by image information and reflected, and transmitted through the polarizing beam splitters 16R, 16G, and 16B.
More specifically, the first, second, and third reflective spatial modulators 18R, 18G, and 18B display image information of three colors of red, green, and blue, respectively, and colors corresponding to incident light. The video signal is applied, and the polarization direction of the incident light is rotated by 90 degrees in accordance with the video signal to be modulated and output. In other words, incident light is converted from S-polarized light to P-polarized light and then modulated and output.
In the present embodiment, the first, second, and third reflective spatial modulators 18R, 18G, and 18B are configured by reflective liquid crystal panels.

(First, second, and third polarization beam splitters 16R, 16G, and 16B)
The first, second, and third polarizing beam splitters 16R, 16G, and 16B are provided for each of the lights R, G, and B guided from the separation unit 14, and the lights R, G, and B are individually incident thereon. .
The first, second, and third polarizing beam splitters 16R, 16G, and 16B have first, second, and third polarizing films 17R, 17G, and 17B, respectively.
In the present embodiment, each polarization beam splitter is composed of two prisms and a polarizing film provided between the two prisms.
Each of the polarizing films 17R, 17G, and 17B is configured to reflect S-polarized light and transmit P-polarized light, for example.
Therefore, the red light R guided from the separation unit 14 is reflected by the first polarizing film 17R, guided to the first reflective spatial modulator 18R, modulated, and P-polarized light whose polarization direction is rotated by 90 degrees. In this state, the light passes through the first polarizing film 17R and is guided to the light combining unit 20.
The green light G guided from the separation unit 14 is reflected by the second polarizing film 17G, guided to the second reflective spatial modulator 18G, modulated, and becomes P-polarized light whose polarization direction is rotated by 90 degrees, In this state, the light passes through the second polarizing film 17G and is guided to the light combining unit 20.
The blue light B guided from the separation unit 14 is reflected by the third polarizing film 17B, guided to the third reflective spatial modulator 18B and modulated, and becomes P-polarized light whose polarization direction is rotated by 90 degrees. In this state, the light passes through the third polarizing film 17B and is guided to the light combining unit 20.
In FIG. 1, reference numerals 19R, 19G, and 19B denote lenses that guide the R, G, and B light emitted from the separation unit 14 to the first, second, and third polarizing beam splitters 16R, 16G, and 16B.

(Photosynthesis unit 20)
The light combining unit 20 combines the light R, G, and B transmitted from the first, second, and third polarizing beam splitters 16R, 16G, and 16B, emits them, and guides them to the projection lens 22.
In the present embodiment, the light combining unit 20 is configured by a cross dichroic prism, but the light combining unit 20 may employ various conventionally known configurations such as a cross dichroic mirror.
The projection lens 22 forms an image on the screen 2 by irradiating the screen 2 with light guided from the light combining unit 20.

(Adjustment method)
Next, adjustment of the illumination range using the mirror holding member 34 will be described.
6A and 6B are explanatory views of the illumination range adjustment operation using the mirror holding member 34, FIG. 7A is a front view of the chuck portion 52, FIG. 7B is a view taken along the arrow B in FIG. FIGS. 9A and 9B are explanatory views of the engaging operation between the chuck portion 52 and the engaging piece portion 40, and FIGS. 9A and 9B are explanatory views of the engaging operation between the chuck portion 52 and the engaging piece portion 40. It is.

As shown in FIG. 6, in the present embodiment, an adjustment jig 50 is used when adjusting the illumination range. In FIG. 6, for easy understanding, the adjustment jig 50 and the chuck portion 52 that are arranged below the base 24 and are hidden by the base 24 are drawn with solid lines. The light source 12, the first, second, and third polarization beam splitters 16R, 16G, and 16B, the first, second, and third reflective spatial modulators 18R, 18G, and 18B, the light combining unit 20, and the projection Illustration of the lens 22 is omitted.
The adjustment jig 50 has two chuck portions 52.
As shown in FIGS. 7A and 7B, the chuck portion 52 has an engagement recess portion 5202 that engages and disengages with the engagement piece portion 40, and the engagement recess portion 5202 includes two engagement piece portions 40. Two inclined surfaces 5210 having the same inclination as the inclined surface 4002 are provided.
As shown in FIGS. 8A and 8B, the adjustment jig 50 is configured to be movable in a direction (Z direction) in which the two chuck portions 52 are in contact with and separated from the two engagement piece portions 40. .
Further, as shown in FIG. 6, the adjustment jig 50 swings in the circumferential direction (θ direction) around the pin 42 with the two chuck portions 52 engaged with the two engagement piece portions 40. It is configured to be movable and movable in the longitudinal direction (X direction) of the long hole 3602.

Next, the adjustment operation will be described.
As shown in FIG. 1, the separation unit 14, first, second, and third polarization beam splitters 16R, 16G, and 16B, first, second, and third reflective spatial modulators 18R, It is assumed that 18G and 18B and the photosynthesis unit 20 are assembled.
The light source 12 is operated, and the light from the light source 12 is irradiated to the separation unit 14.
At this time, the first, second, and third reflective spatial modulators 18R, 18G, and 18B are set so that a uniform white screen is displayed on the screen.
As shown in FIGS. 7A and 7B, the chuck portion 52 is exposed to the two engaging piece portions 40 of the mirror holding member 34 of the first and second reflecting mirrors 30 and 32 from the back surface 2404 of the base 24. I will. Next, the engagement concave portion 5202 is engaged with the engagement piece portion 40 by bringing the chuck portion 52 close to the engagement piece portion 40.
At this time, as shown in FIG. 8A, the inclined surface 4002 of the engagement piece 40 is engaged even when the positions of the engagement piece 40 and the engagement recess 5202 of the chuck 52 are slightly shifted. By being guided by the inclined surface 5210 of the concave portion 5202, the engagement piece portion 40 and the chuck portion 52 are reliably engaged.
Next, the mirror holding member 34, that is, the first and second reflecting mirrors 30 and 32 are moved in the θ direction and the X direction using the adjustment jig 50 so that the effective screen of the white image on the screen becomes uniform white. Let
With the above operation, the angles of the first and second reflection mirrors 30 and 32 so that the R, G, and B light separated by the separation unit 14 uniformly irradiate the reflective spatial modulators 18R, 18G, and 18B, The position is adjusted, and therefore the illumination range of the projector device 10 is adjusted.
When the illumination range is adjusted, the mirror holding member 34 is fixed to the base 24 with the screw N (FIG. 1).
Note that the color of the image projected on the screen is not limited to white, and adjustment may be performed using each of R, G, and B as single colors.

As described above, according to the present embodiment, the inclined surfaces 4002 of the two engaging piece portions 40 provided on the mirror holding member 34 are engaged with the inclined surfaces 5210 of the adjusting jig 50, so that the adjusting jig 50 The angle adjustment and position adjustment of the first and second reflection mirrors 30 and 32 can be performed by moving.
Then, the adjustment jig 50 may be moved manually or mechanically automatically.
Therefore, according to the present embodiment, the first and second surfaces are utilized by using the inclined surfaces 4002 of the two engaging pieces 40 provided on the mirror holding member 34 that holds the first and second reflecting mirrors 30 and 32. The angle and position of the reflection mirrors 30 and 32 can be adjusted.
Therefore, the illumination range can be easily and reliably adjusted, which is advantageous in simplifying the work and improving productivity.

  In the present embodiment, the case where the light separation means of the light separation unit 14 is configured by the first and second dichroic mirrors 26 and 28 has been described, but a dichroic prism may be used as the light separation means. That is, the separation unit 14 only needs to be able to separate light from the light source 12 into red, green, and blue light, and various conventionally known configurations can be employed.

In the present embodiment, the case where the separation unit 14 is configured to hold the first and second reflection mirrors 30 and 32 with the mirror holding member 34 has been described. The invention is applicable.
That is, the separation unit includes a plate-shaped base, a plurality of dichroic mirrors that separate the light into two different wavelength bands, a plurality of reflection mirrors that reflect the separated light, and a surface of the base And a mirror holding member that holds at least one of the plurality of dichroic mirrors and the plurality of reflection mirrors.
The mirror holding member is supported so as to be rotatable about an axis perpendicular to the thickness direction of the base and to be movable on the surface of the base.
The mirror holding member includes a substrate portion, an upright piece portion that is erected from the substrate portion and to which the dichroic mirror or the reflection mirror is attached, and the upright piece portion from two spaced apart positions of the substrate portion. And two engaging pieces projecting in opposite directions.
An engagement piece portion hole for projecting the two engagement piece portions from the back surface opposite to the front surface of the base in a state where the base plate portion is attached to the base, and the mirror holding member to the base. It is provided in such a size that it can move on the surface.
An inclined surface is formed at a position of the two engagement piece portions protruding from the back surface through the engagement piece portion hole so that a distance between the two gradually increases as the distance from the substrate portion increases.
Of course, the same effects as those of the embodiment can be obtained even in such a configuration.

In the present embodiment, reflection spatial modulators 18R, 18G, and 18B formed of reflective liquid crystal panels are used as three spatial modulators that modulate each of the light separated by the separation unit 14 with image information. The case of using was described.
However, the spatial modulator is not limited to the reflective liquid crystal panel, but is conventionally a transmissive liquid crystal panel or a DMD (Digital Micro mirror Device) using a large number of minute reflective mirrors. Various known spatial modulators can be employed.

It is explanatory drawing which shows the structure of the projector apparatus 10 of this Embodiment. 3 is a side view of first and second reflecting mirrors 30 and 32 assembled to a base 24. FIG. FIG. 3 is a view as seen from an arrow A in FIG. 2. 4 is a plan view of a mirror holding member 34. FIG. It is a side view of the mirror holding member 34 to which the first and second mirrors 30 and 32 are attached. It is explanatory drawing of adjustment operation of the illumination range using the mirror holding member. (A) is a front view of the chuck | zipper part 52, (B) is a B arrow directional view of (A). (A), (B) is explanatory drawing of engagement operation | movement with the chuck | zipper part 52 and the engagement piece part 40. FIG. (A), (B) is explanatory drawing of engagement operation | movement with the chuck | zipper part 52 and the engagement piece part 40. FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Projector apparatus, 12 ... Light source, 14 ... Separation part, 24 ... Base, 2402 ... Front surface, 2404 ... Back surface, 2410 ... Hole for engagement piece part, 26 ... 1st dichroic mirror, 28 …… Second dichroic mirror, 30 …… First reflecting mirror, 32 …… Second reflecting mirror, 34 …… Mirror holding member, 36 …… Substrate portion, 38 …… Standing piece portion, 40 …… Engagement piece Part, 4002 ... inclined surface.

Claims (6)

A light source;
A separation unit that separates light from the light source into light of three different wavelengths;
Three spatial modulators for modulating each of the light separated by the separation unit with image information,
The separator is
A plate-like base;
A plurality of light separating means for separating the light into two different wavelength bands;
A plurality of reflecting mirrors for reflecting the light separated by each of the light separating means;
A mirror that holds at least one of the plurality of reflecting mirrors on the surface of the base, and is supported so as to be rotatable about an axis perpendicular to the thickness direction of the base and movable on the surface of the base. A holding member,
The mirror holding member is
A substrate section;
An upright piece that is erected from the substrate and to which the reflection mirror is attached;
Two engaging pieces projecting in opposite directions from the standing piece from two spaced apart positions of the substrate part,
An engagement piece portion hole for projecting the two engagement piece portions from the back surface of the base in a state where the base plate portion is attached to the base, and the mirror holding member on the surface of the base. It is provided in a size that can be moved,
An inclined surface is formed at the location of the two engagement piece portions protruding from the back surface through the engagement piece portion hole, and the distance between them gradually approaches as the distance from the substrate portion increases.
Projector device. The two engagement piece portions are provided at both ends of the reflection mirror in the width direction, which is a direction orthogonal to a direction in which the standing piece portion stands, at the standing piece portion at the place of the substrate portion.
The projector device according to claim 1. A pin protrudes from the base,
A long hole through which the pin is inserted is formed in the substrate part,
When the pin is inserted into the elongated hole, the mirror holding member is supported so as to be rotatable around the axis around the pin.
The projector device according to claim 1. The light separating means is a dichroic mirror;
The projector device according to claim 1. The light separating means is a dichroic prism;
The projector device according to claim 1. A light source;
A separation unit that separates light from the light source into light of three different wavelengths;
Three spatial modulators for modulating each of the light separated by the separation unit with image information,
The separator is
A plate-like base;
A plurality of dichroic mirrors for separating the light into two different wavelength bands;
A plurality of reflecting mirrors for reflecting the light separated by the dichroic mirror;
Holds at least one of the plurality of dichroic mirrors and the plurality of reflection mirrors on the surface of the base, and is rotatable on an axis perpendicular to the thickness direction of the base and moves on the surface of the base A mirror holding member supported in a possible manner,
The mirror holding member is
A substrate section;
An upright piece portion that is erected from the substrate portion and to which the dichroic mirror or the reflection mirror is attached;
Two engaging pieces projecting in opposite directions from the standing piece from two spaced apart positions of the substrate part,
An engagement piece portion hole for projecting the two engagement piece portions from the back surface of the base in a state where the base plate portion is attached to the base, and the mirror holding member on the surface of the base. It is provided in a size that can be moved,
An inclined surface is formed at the location of the two engagement piece portions protruding from the back surface through the engagement piece portion hole, and the distance between them gradually approaches as the distance from the substrate portion increases.
Projector device.

Images