JP2011022530A - Projector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a projector saving time and labor for readjusting a mirror. <P>SOLUTION: The projector 12 has a housing 20, an image light generation part 21, and an optical system 22. The image light generation part 21 and the optical system 22 are housed in the housing 20. The image light generation part 21 radiates image light. The image light radiated from the image light generation part 21 goes toward a screen through an aperture 20a provided on the housing 20. The image light radiated from the image light generation part 21 is cast to the screen, so as to project an image on the screen. The optical system 22 is provided between the image light generation part 21 and the aperture 20a, and has a pair of polarizers 38, a prism block 36, a mirror 37a, and a mirror 37b successively arranged from the image light generation part 21 to the aperture 20a. The prism block 36 is formed like a triangle pole. The prism block 36 reflects the image light radiated from the image light generation part 21. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a projector that projects a desired image on a screen.

  The projector projects an image light recorded on a film or an image light modulated by an image displayed on a liquid crystal panel or a CRT onto a screen, and an optical device for adjusting the image size and focus on the screen. The system is provided. Also, such projectors are known that have a shift function so that the projection position of an image on the screen can be adjusted without changing the position or angle of the projector body.

  Use such a projector to project a pair of images with parallax on the screen so that a stereoscopic image can be viewed, or project a plurality of spatially continuous images on the screen. Attempts have been made to make it possible to view panoramic images. In such a case, it is convenient to use a plurality of projectors (for example, Patent Document 1). However, in addition to the complicated setting of each projector, when projecting a moving image, a plurality of projectors are accurately used. In consideration of difficulties such as having to synchronize, a projector has been devised that can project a plurality of images at the same time (for example, Patent Document 2).

  The projector described in Patent Literature 2 generates stereoscopic image light, and includes a projector body, a video separation mechanism, a plate-like mirror that is an optical system, and a control unit that adjusts the orientation of the mirror. Have. The projector main body projects image light including a pair of images having parallax to the video separation mechanism. The video separation mechanism separates the projected image light into two image lights. The control unit and the mirror adjust the directing directions of the two separated image lights based on the parallax.

JP 2001-125042 A JP 2001-305478 A

  As is well known, since a projector uses a high-intensity lamp as a light source to obtain bright image light, the optical system becomes very hot while the projector is used. However, when the projector described in Patent Document 2 is used, as a result of the temperature of the mirror rising, the reflection surface of the mirror is curved due to thermal expansion. If the reflecting surface of the mirror is curved, the position of the image displayed on the screen is displaced, the image is distorted, and the like, so that it is difficult to view the stereoscopic image. For this reason, when the projector is used, it is necessary to adjust the mirror, which takes extra time.

  An object of the present invention is to provide a projector that can save the trouble of readjustment of the posture of a reflection member for image light.

  In order to solve the above problems, a projector according to the present invention forms image light generation means for generating image light modulated by an image including a first image and a second image, and the first image of the image light. A first reflecting surface on which only the first image light is projected, and a second reflecting surface on which only the second image light that forms the second image of the image light is projected, the first reflecting surface and the A prism block that separates the image light into the first image light and the second image light by a second reflecting surface, a first reflecting member that reflects the separated first image light toward the screen, and the separation The second reflecting member that reflects the second image light directed toward the screen and the postures of the first and second reflecting members are individually controlled, and reflected on the screen by the reflection of the first and second reflecting members. The first image light heading and the Characterized by comprising an adjustment means for adjusting the orientation of the two images light.

  The first reflecting member is a first glass block having a first reflecting surface that reflects the first image light, and the second reflecting member is a second glass having a second reflecting surface that reflects the second image light. A block is preferred. Furthermore, it is preferable that the prism block, the first glass block, and the second glass block have the same shape.

  The first image and the second image are a pair of stereoscopic images having binocular parallax, and the adjusting means determines a directivity direction of the first image light and the second image light based on the binocular parallax. It is preferable to adjust. The prism block is formed with ridge lines of the first reflection surface and the second reflection surface, the ridge lines are located on an optical axis of the image light, and the first image light and the second image light are It is preferable that the prism block is arranged so as to be incident on the prism block with the ridge line in between.

  According to the present invention, since the image light is reflected using the prism block, even if the temperature of the prism block rises due to the reflection of the image light, thermal expansion of the prism block hardly occurs. Therefore, according to the present invention, the trouble of readjustment of the posture of the image light reflecting member can be saved.

It is a perspective view which shows the outline | summary of the stereoscopic vision system which has the 1st projector of this invention. It is the schematic of the 1st projector of this invention. It is the schematic of the several image which a 1st projector produces | generates. It is explanatory drawing of the 1st image when seeing an object from the 1st position, and the 2nd image when seeing an object from the 2nd position. It is the schematic which shows a mode that the several image from a 1st projector is projected on a prism block. It is the schematic of the image projected on the screen by the 1st projector. It is the schematic of the 2nd projector of this invention. It is the schematic of the 3rd projector of this invention. It is the schematic of the 4th projector of this invention. It is the schematic of the image projected on the screen by the 5th projector of this invention.

  As shown in FIG. 1, the stereoscopic system 10 includes a screen 11, a projector 12, and polarized glasses 13. The projector 12 projects a predetermined image on the screen 11. By using the polarized glasses 13, the image displayed on the screen 11 forms a stereoscopic image.

  As shown in FIG. 2, the projector 12 includes a housing 20, an image light generation unit 21, and an optical system 22. The image light generator 21 and the optical system 22 are housed in the housing 20.

  The image light generation unit 21 generates light (hereinafter referred to as image light) forming an image 25 (see FIG. 3), and emits the generated image light, and includes a light source and a modulation unit. Light from the light source is projected to the modulation unit. The modulator generates image light that forms an image using light from the light source. The image light emitted from the image light generation unit 21 travels to the screen 11 through the opening 20 a provided in the housing 20.

  As shown in FIG. 3, the image 25 includes a first image 25a and a second image 25b. In the image 25, the first image 25a and the second image 25b are arranged in the direction A without overlapping. As shown in FIGS. 3 and 4, the first image 25a is an image when the object 32 is viewed from the first position 31a, and the second image 25b is an object from a second position 31b different from the first position 31a. It is an image when 32 is seen. The contour of the object 32 is a first contour 32a represented by a two-dot chain line in the first image 25a, and a second contour 32b represented by a solid line in the second image 25b.

  Returning to FIG. 2, the optical system 22 is provided between the image light generator 21 and the opening 20a. The optical system 22 adjusts the position where the image is displayed on the screen 11. The optical system 22 includes a prism block 36, a mirror 37a and a mirror 37b, and a polarizer pair 38 that are sequentially arranged from the image light generator 21 toward the opening 20a.

  The prism block 36 is formed in a triangular prism shape, and has a first reflecting surface 36a and a second reflecting surface 36b on the side surface. The first reflecting surface 36a and the second reflecting surface 36b are sequentially arranged in the direction A. It is preferable that a vapor deposition film of a metal such as aluminum or silver is provided on the first reflecting surface 36a and the second reflecting surface 36b. The first image light forming the first image 25a (see FIG. 3) is incident on the first reflecting surface 36a, and the second image light forming the second image 25b (see FIG. 3) is incident on the second reflecting surface 36b. A prism block 36 is disposed. Therefore, when the image light from the image light generation unit 21 is projected onto the prism block 36, only the first image light is projected onto the first reflection surface 36a, and only the second image light is projected onto the second reflection surface 36b. Is projected. As a result, the first reflecting surface 36a reflects only the first image light, and the second reflecting surface 36b reflects only the second image light. The first image light reflected by the first reflecting surface 36a is directed to the mirror 37a. Similarly, the second image light reflected by the second reflecting surface 36b is directed to the mirror 37b.

  As shown in FIG. 5, the ridge line 36c formed by the first reflection surface 36a and the second reflection surface 36b is located on the optical axis of the image light from the image light generation unit 21, and the first image light and the second image It is preferable that the prism block 36 is arranged so that light is incident on the ridge line 36c. The material for forming the prism block 36 is preferably optical glass, for example. The prism block 36 is not limited to a triangular prism shape, and may be formed in a quadrangular prism shape, a pentagonal prism shape, or other column shapes.

  Returning to FIG. 2, the mirror 37a and the mirror 37b are each formed in a plate shape. The mirror 37a and the mirror 37b are provided on the optical axis of the image light reflected by the first reflecting surface 36a and the second reflecting surface 36b, respectively. The mirror 37a reflects the first image light reflected by the first reflecting surface 36a toward the polarizer pair 38, and the mirror 37b reflects the second image light reflected by the second reflecting surface 36b. Reflect towards The mirror 37a is supported by a support bar 39a. The support bar 39a is rotatably provided. As the support bar 39a rotates, the mirror 37a rotates about the support bar 39a. Similarly, the mirror 37b is supported by a rotatable support bar 39b. As the support bar 39a is rotated, the mirror 37a rotates about the support bar 39a.

  The polarizer pair 38 includes a polarizer 38a and a polarizer 38b. The polarizer 38a is provided on the optical axis of the first image light reflected by the mirror 37a. The polarizer 38b is provided on the optical axis of the second image light reflected by the mirror 37b. Further, the polarizer 38a and the polarizer 38b are arranged so that their polarization directions are orthogonal to each other.

  In the case 20, convex lenses 40, 41a, and 41b are appropriately provided on the optical axis of the image light. The convex lens 40 is disposed between the image light generator 21 and the prism block 36. The convex lens 41a is disposed between the mirror 37a and the polarizer 38a, and the convex lens 41b is disposed between the mirror 37b and the polarizer 38b.

  The drive device 45 rotates the support bar 39a and the support bar 39b independently of each other. The control unit 47 independently controls the amount of rotation of the support bar 39a and the support bar 39b by the driving device 45. The mirror 37a and the mirror 37b are independently rotated by a desired rotation amount by the driving device 45 and the control unit 47. Further, the image light generation unit 21, the polarizers 38a to 38b, the prism block 36, the support rods 39a to 39b, and the convex lenses 40 and 41a to 41b are attached to the housing 20 by attachment members (not shown).

  Returning to FIG. 1, the polarizing glasses 13 include a frame 50, a polarizing member 51 a and a polarizing member 51 b attached to the frame 50. The polarizing member 51b is attached at a position that becomes the second position 31b (see FIG. 4) when the attaching position of the polarizing member 51a is regarded as the first position 31a (see FIG. 4). The polarization direction of the polarization member 51a is parallel to the polarization direction of the polarizer 38a, and the polarization direction of the polarization member 51b is parallel to the polarization direction of the polarizer 38b. The polarizing glasses 13 are used so that the direction in which the polarizing member 51a and the polarizing member 51b are aligned is the direction in which the polarizer 38a and the polarizer 38b are aligned.

  Next, the operation of the present invention will be described. As shown in FIGS. 1 and 2, the image light forming the image 25 (see FIG. 3) is emitted from the image light generation unit 21. As shown in FIGS. 2 and 5, the image light from the image light generation unit 21 is projected onto the prism block 36 via the convex lens 40. Since the prism block 36 is provided at a predetermined position, the first image light is reflected by the first reflecting surface 36a, and the second image light is reflected by the second reflecting surface 36b. Thus, the prism block 36 separates the image light emitted from the image light generation unit 21 into the first image light and the second image light. The separated first image light is reflected by the mirror 37 a, passes through the polarizer 38 a, and then is projected to a predetermined position on the screen 11. Similarly, the separated second image light is reflected by the mirror 37b, transmitted through the polarizer 38b, and then projected to a predetermined position on the screen 11.

  On the screen 11, an image 60 (see FIG. 6) including the first image 25a and the second image 25b is displayed. Since the first image light reflected from the screen 11 is transmitted through the polarizer 38a, it passes through the polarizing member 51a but does not pass through the polarizing member 51b. Similarly, since the second image light reflected from the screen 11 is transmitted through the polarizer 38b, it passes through the polarizing member 51b but does not pass through the polarizing member 51a. Furthermore, the positions at which the first image 25a and the second image 25b (see FIG. 3) are displayed on the screen 11 are the positions at the first position 31a and the second position 31b (see FIG. 4) by the driving device 45 and the control unit 47. It is adjusted based on binocular parallax. Accordingly, the reflected light of the image 60 is transmitted through the polarizing members 51a and 51b of the polarizing glasses 13, thereby enabling stereoscopic viewing.

  In the present invention, since the prism block 36 having the first reflecting surface 36a that reflects the first image light and the second reflecting surface 36b that reflects the second image light is used as the image light reflecting member, the temperature of the reflecting member is increased. The resulting curvature of each reflecting surface can be suppressed. Therefore, according to the present invention, it is possible to save the trouble of readjustment of the posture of the reflecting member while a predetermined image is projected on the screen.

  In the above embodiment, the mirror 37a and the mirror 37b are used as the plate-like reflecting members, but the present invention is not limited to this, and as shown in FIG. 7, a prism block 71a and a prism block are used instead of the mirror 37a and the mirror 37b. 71b may be used. Further, as shown in FIG. 8, the prism block 36, the prism block 71a, and the prism block 71b may be formed in the same shape.

  In the above embodiment, the prism block 36 having the first reflecting surface 36a and the second reflecting surface 36b is used. However, the present invention is not limited to this, and instead of the prism block 36, as shown in FIG. You may use the prism 75 which has the ridgeline 75c formed by 75a, the reflective surface 75b, and the reflective surfaces 75a and 75b. In FIG. 9, a prism block 71a and a prism block 71b may be used instead of the mirror 37a and the mirror 37b.

  The reflection by each prism may be reflection on the outer surface of the prism as shown in FIG. 7, or total reflection inside the prism as shown in FIG.

  Note that a known image display device such as a liquid crystal display device may be used as the image light generation unit 21. When a liquid crystal display device is used as the image light generation unit 21, either one of the polarizers 38a and 38b may be omitted, and a ½ plate may be provided instead of the other polarizer.

  In the above embodiment, the projector 12 is used in the stereoscopic system 10, but the present invention is not limited to this, and as shown in FIG. 10, the first device using the drive device 45 and the control unit 47 (see FIG. 2). The position where the image 80a is projected on the screen 11 and the position where the second image 80b is projected on the screen 11 may be adjusted so as not to overlap each other. Thereby, it becomes possible to project a plurality of images on one screen 11 simultaneously. The plurality of images displayed at the same time may be a series of images or separate images. Also, the number of images may be three or more. Further, in the above embodiment, a plurality of images are arranged in the A direction on the screen 11, but the present invention is not limited to this, and a plurality of images may be arranged in a direction orthogonal to the A direction. A plurality of images may be arranged in a direction orthogonal to the direction.

DESCRIPTION OF SYMBOLS 10 Stereoscopic system 12 Projector 21 Image light projection part 22 Optical system 36, 71a, 71b, 75 Prism block 36a, 36b Reflecting surface

Claims (5)

Image light generating means for generating image light modulated by an image including the first image and the second image;
A first reflecting surface on which only the first image light forming the first image is projected out of the image light, and a second reflecting surface on which only the second image light forming the second image out of the image light is projected. A prism block that separates the image light into the first image light and the second image light by the first reflection surface and the second reflection surface;
A first reflecting member that reflects the separated first image light toward the screen, and a second reflecting member that reflects the separated second image light toward the screen;
Adjustment means for individually controlling the postures of the first and second reflecting members and adjusting the directivity directions of the first image light and the second image light toward the screen by reflection of the first and second reflecting members. A projector comprising: The first reflecting member is a first glass block having a first reflecting surface that reflects the first image light,
The projector according to claim 1, wherein the second reflecting member is a second glass block having a second reflecting surface that reflects the second image light.   The projector according to claim 2, wherein the prism block, the first glass block, and the second glass block have the same shape. The first image and the second image are a pair of stereoscopic images having binocular parallax,
The projector according to any one of claims 1 to 3, wherein the adjusting unit adjusts the directivity directions of the first image light and the second image light based on the binocular parallax. The prism block is formed with ridge lines of the first reflecting surface and the second reflecting surface,
The ridge line is located on the optical axis of the image light,
5. The prism block according to claim 1, wherein the prism block is arranged so that the first image light and the second image light are incident on the prism block with the ridge line in between. projector.

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