JP2008145866A - Method and apparatus of manufacture image display apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To position a polarization axis controlling plate toward an image creating section to be performed with accuracy and ease. <P>SOLUTION: A method of manufacturing an image display apparatus includes an image observing step and a position adjusting step. At the image observing step, a conditioning image passing through a first polarization region of a polarization axis controlling plate is observed through a polarizing plate which transmits light having a polarization axis being in parallel with a polarization axis of light passing through the first polarization region of the polarization axis controlling plate. At the position adjusting step, a position of the polarization axis controlling plate toward the image creating section is adjusted by relatively moving the position of the polarization axis controlling plate toward the image creating section till the conditioning image created at part of a left eye image creating region cannot be observed and then is fixed when the conditioning image created at part of the left eye image creating region is observed after passing through the polarizing plate at the image observing stage. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an image display device manufacturing method and a manufacturing apparatus. In particular, the present invention relates to a manufacturing method and a manufacturing apparatus for an image display apparatus that displays a stereoscopic image by projecting a right-eye image and a left-eye image to an observer.

  It has an image generation unit that displays the image for the right eye and the image for the left eye in different areas, and a polarization axis control plate that makes the polarization axes of light incident on the two different areas orthogonal to each other. An image display device that projects a parallax image is known (see, for example, Patent Document 1).

When observing a parallax image displayed on such an image display device, an observer may feel crosstalk. In order to reduce such crosstalk, each of the region for displaying the image for the right eye and the region for displaying the image for the left eye in the image generation unit faces one of two different regions on the polarization axis control plate. It is preferable to arrange it accurately at the position.
JP 2006-284873 A

  However, at the time of manufacturing the image display device, for example, the polarization with respect to the image generation unit so as to accurately arrange the region for displaying the image for the right eye in the image generation unit at a position facing the first polarization region on the polarization axis control plate. It was difficult to accurately position the axis control plate.

  In order to solve the above problems, in the first embodiment of the present invention, there is provided a method for manufacturing an image display device that displays a stereoscopic image by projecting a right-eye image and a left-eye image to an observer, the right-eye An image generation unit preparation stage for preparing an image generation unit having a right eye image generation region for generating an image and a left eye image generation region for generating a left eye image, a first polarization region provided corresponding to the right eye image generation region, and When the linearly polarized light whose polarization axis is in a specific direction is incident on the first polarizing region and the second polarizing region from the first polarizing region Polarization axis control to prepare a polarization axis control plate in which the outgoing light from the second polarizing region and the outgoing light from the second polarization region are linearly polarized light whose polarization axes are orthogonal to each other, or circularly polarized light whose polarization directions are opposite to each other. Board preparation The floor, the temporary placement stage for temporarily placing the polarization axis control plate on the side of the image generation unit viewer, and the right eye image generation region and the left eye image generation region in the image generation unit are different from each other. An adjusted image generating stage for generating an adjusted image, a light source light incident stage for allowing light to enter from the side opposite to the side observed by the observer in the image generating unit, the emitted light from the first polarizing region of the polarization axis control plate, and the first In the image observation stage of observing the adjusted image that has passed through the polarization axis control plate through the polarizing plate that transmits one of the light beams emitted from the two polarization regions, and in the image observation stage, the first of the polarization axis control plate When the adjustment image transmitted through the polarization axis control plate is observed through a polarizing plate that transmits light having a polarization axis parallel to the polarization axis of the light transmitted through one polarization region, the polarization is generated in the left eye image generation region. First offset of shaft control plate The relative position of the polarization axis control plate with respect to the image generation unit is moved until the adjusted image transmitted through the region is no longer observed, and the polarization axis is parallel to the polarization axis of the light transmitted through the second polarization region of the polarization axis control plate. When observing the adjustment image that has passed through the polarization axis control plate through the polarizing plate that transmits the light, the adjustment image that is generated in the right-eye image generation region and that has passed through the second polarization region of the polarization axis control plate is observed. The position adjustment step of adjusting and fixing the position of the polarization axis control plate relative to the image generation unit by moving the position of the polarization axis control plate relative to the image generation unit until the image generation unit is eliminated. A manufacturing method is provided.

  Further, in the second embodiment of the present invention, there is provided a method of manufacturing an image display device that displays a stereoscopic image by projecting a right-eye image and a left-eye image to an observer, and a right-eye image that generates a right-eye image. An image generation unit preparation stage for preparing an image generation unit having a generation region and a left-eye image generation region for generating a left-eye image; a first polarization region and a left-eye image generation region provided corresponding to the right-eye image generation region; When the linearly polarized light whose polarization axis is in a specific direction is incident on the first polarizing region and the second polarizing region, the outgoing light from the first polarizing region and the second polarizing region are provided. A polarization axis control plate preparation step for preparing a polarization axis control plate in which the light emitted from the polarization region is linearly polarized light whose polarization axes are orthogonal to each other or circularly polarized light whose rotation directions are opposite to each other. Axis control board While temporarily placing the image generation unit on the side to be observed by the observer, and generating the adjustment image in at least a part of one of the right eye image generation region and the left eye image generation region in the image generation unit, An adjustment image generation stage that does not generate an adjustment image in the other of the right eye image generation region and the left eye image generation region adjacent to a partial region of one of the right eye image generation region and the left eye image generation region, and an image generation unit A light source light incident stage in which light is incident from the side opposite to the side observed by the observer, and the right-eye image generation region and the left-eye image generation region of the first polarization region and the second polarization region of the polarization axis control plate In the image observation stage for observing the adjusted image transmitted through the polarization axis control plate through the polarizing plate that transmits the light emitted from one corresponding to the other, the right eye image generation process in the image observation stage When the adjustment image generated in one of the left eye image generation regions is observed through the polarizing plate, the image is adjusted until the adjustment image generated in the partial region is not observed. There is provided a method of manufacturing an image display device, including a position adjustment step of adjusting and fixing the position of the polarization axis control plate with respect to the image generation unit by relatively moving the position of the polarization axis control plate with respect to the generation unit. The

  Further, in the third aspect of the present invention, the right-eye image is an apparatus for manufacturing an image display device that displays a stereoscopic image by projecting a right-eye image and a left-eye image to an observer, and generates a right-eye image. An image generation unit preparation unit for preparing an image generation unit having a generation region and a left-eye image generation region for generating a left-eye image, a first polarization region and a first polarization region provided corresponding to the right-eye image generation region and the left-eye image generation region A polarization axis control plate preparation unit that has two polarization regions and prepares a polarization axis control plate that orthogonally crosses the polarization axis of light incident on the first polarization region and the polarization axis of light incident on the second polarization region; Adjustment images that are different from each other are provided in a temporary placement unit that temporarily places the polarization axis control plate on the viewer side of the image generation unit, and in at least a part of the right-eye image generation region and the left-eye image generation region in the image generation unit. Living An adjusted image generating unit, a light source light incident unit that allows light to enter from an opposite side to the observer in the image generating unit, and any one of the first polarizing region and the second polarizing region of the polarization axis control plate An image observation unit for observing an adjustment image transmitted through the polarization axis control plate through a polarizing plate that transmits light having a polarization axis parallel to the polarization axis of the transmitted light, and the image observation unit includes: When the adjustment image transmitted through the polarization axis control plate is observed through a polarizing plate that transmits light having a polarization axis parallel to the polarization axis of the light transmitted through one polarization region, the polarization is generated in the left eye image generation region. Move the position of the polarization axis control plate relative to the image generation unit until the adjusted image that has passed through the first polarization area of the axis control plate is no longer observed, and the light transmitted through the second polarization area of the polarization axis control plate Polarizing plate that transmits light having a polarization axis parallel to the polarization axis When the adjustment image transmitted through the polarization axis control plate is observed, until the adjustment image generated in the right eye image generation region and transmitted through the second polarization region of the polarization axis control plate is no longer observed, An apparatus for manufacturing an image display device is provided that includes a position adjustment unit that adjusts and fixes the position of the polarization axis control plate with respect to the image generation unit by relatively moving the position of the polarization axis control plate.

  In the fourth embodiment of the present invention, there is provided a manufacturing apparatus for an image display device that displays a stereoscopic image by projecting a right-eye image and a left-eye image to an observer, and a right-eye image that generates a right-eye image. An image generation unit preparation unit for preparing an image generation unit having a generation region and a left-eye image generation region for generating a left-eye image, a first polarization region and a first polarization region provided corresponding to the right-eye image generation region and the left-eye image generation region A polarization axis control plate preparation unit that has two polarization regions and prepares a polarization axis control plate that orthogonally crosses the polarization axis of light incident on the first polarization region and the polarization axis of light incident on the second polarization region; An adjustment image in at least a part of one of a temporary placement unit that temporarily places the polarization axis control plate on the side of the image generation unit viewed by an observer and a right-eye image generation region and a left-eye image generation region in the image generation unit Generate a Meanwhile, an adjustment image generation unit that does not generate an adjustment image in the other of the right eye image generation region and the left eye image generation region adjacent to one of the right eye image generation region and the left eye image generation region, and an image A light source light incident unit that allows light to enter from the side opposite to the side observed by the observer in the generation unit, and a right eye image generation region and a left eye image generation region among the first polarization region and the second polarization region of the polarization axis control plate An image observation unit for observing the adjusted image transmitted through the polarization axis control plate via a polarizing plate that transmits light having a polarization axis parallel to the polarization axis of the light transmitted through one corresponding to the other, and image observation The adjustment image generated in the partial area when the adjustment image generated in one partial area of the right-eye image generation area and the left-eye image generation area is observed through the polarizing plate. Is not observed Until the position of the polarization axis control plate relative to the image generation unit is relatively moved, the position of the polarization axis control plate with respect to the image generation unit is adjusted and then fixed in the position adjustment unit and the image observation unit. When observing an adjustment image transmitted through the polarization axis control plate through a polarizing plate that transmits light having a polarization axis parallel to the polarization axis of the light transmitted through the first polarization region of the control plate, the left eye image generation region The relative position of the polarization axis control plate is moved relative to the image generator until the adjusted image that has been generated and transmitted through the first polarization area of the polarization axis control plate is no longer observed. When an adjustment image transmitted through the polarization axis control plate is observed through a polarizing plate that transmits light having a polarization axis parallel to the polarization axis of the transmitted light, the polarization axis control plate is generated in the right-eye image generation region. The adjusted image transmitted through the second polarization region An image display device having a position adjusting unit that adjusts and fixes the position of the polarization axis control plate relative to the image generation unit by moving the position of the polarization axis control plate relative to the image generation unit until the image generation unit is not observed. A manufacturing apparatus is provided.

  The above summary of the invention does not enumerate all the necessary features of the present invention, and sub-combinations of these feature groups can also be the invention.

  As is clear from the above description, each of the right eye image generation region and the left eye image generation region in the image generation unit is accurately arranged at a position facing one of the first polarization region and the second polarization region on the polarization axis control plate. As described above, the polarization axis control plate can be accurately and easily positioned with respect to the image generation unit.

  Hereinafter, the present invention will be described through embodiments of the invention. However, the following embodiments do not limit the invention according to the scope of claims, and all combinations of features described in the embodiments are included. It is not necessarily essential for the solution of the invention.

  FIG. 1 is an exploded perspective view of an image display apparatus 100 manufactured by the manufacturing apparatus 10 of the present embodiment. FIG. 2 is a schematic diagram illustrating a usage state of the image display apparatus 100. As shown in FIG. 1, the image display apparatus 100 includes a light source 120, a condenser lens 130, a polarizing plate 150, an image generation unit 160, a polarizing plate 170, a polarization axis control plate 180, and a horizontal diffusion plate. 190 in this order, and these are accommodated in a case 110 described later.

  The light source 120 is disposed on the farthest side of the image display device 100 when viewed from the viewer 500, and emits white non-polarized light. The condensing lens 130 condenses the light incident from the light source 120 on the viewer 500 side. For example, a Fresnel lens sheet is used for the condenser lens 130.

  The polarizing plate 150 is disposed on the light source 120 side in the image generation unit 160. When the non-polarized light that is emitted from the light source 120 and becomes substantially parallel light by the condenser lens 130 enters the polarizing plate 150, the polarization axis of the non-polarized light transmits light in a specific direction, and the polarization axis Blocks light whose direction is orthogonal to this particular direction. Here, the direction of the polarization axis is the vibration direction of the electric field in the light, and the specific direction in the polarizing plate 150 is a direction of 45 degrees on the upper right when the observer 500 views the image display device 100. is there. Therefore, the light transmitted through the polarizing plate 150 is linearly polarized light whose polarization axis is in the direction of 45 degrees on the upper right.

  The image generation unit 160 includes a right eye image generation area 162 and a left eye image generation area 164. As shown in FIG. 1, the right eye image generation area 162 and the left eye image generation area 164 are areas obtained by dividing the image generation unit 160 in the horizontal direction, and a plurality of right eye image generation areas 162 and left eye image generation areas 164 are vertical. Staggered in the direction. In the usage state of the image display device 100, a right-eye image and a left-eye image are generated in the right-eye image generation region 162 and the left-eye image generation region 164 of the image generation unit 160, respectively. At this time, when the light transmitted through the polarizing plate 150 is incident on the right eye image generation region 162 and the left eye image generation region 164 of the image generation unit 160, the transmitted light of the right eye image generation region 162 is the image light of the right eye image (hereinafter, “ The light transmitted through the left-eye image generation region 164 is image light of the left-eye image (hereinafter abbreviated as “left-eye image light”). For such an image generation unit 160, for example, an LCD (liquid crystal display) in which a plurality of small cells are arranged two-dimensionally in the horizontal direction and the vertical direction and liquid crystal is sealed between alignment films in each cell is used. In this LCD, each cell is electrically driven to switch between a state in which the direction of the polarization axis of the light passing through the liquid crystal is transmitted as it is and a state in which the direction of the polarization axis is rotated by 90 degrees and transmitted.

  The polarizing plate 170 is disposed on the horizontal diffusion plate 190 side in the image generation unit 160. When the right-eye image light that has passed through the right-eye image generation region 162 and the left-eye image light that has passed through the left-eye image generation region 164 are incident on the polarizing plate 170, the direction of the polarization axis is a specific direction. The light having the polarization axis direction orthogonal to the specific direction is blocked. Here, the specific direction in the polarizing plate 170 is a direction of 45 degrees on the upper left when the viewer 500 views the image display device 100. Therefore, the light transmitted through the polarizing plate 170 is linearly polarized light whose polarization axis is in the direction of the upper left 45 degrees.

  The polarization axis control plate 180 has a first polarization region 182 and a second polarization region 184. The positions and sizes of the first polarization region 182 and the second polarization region 184 on the polarization axis control plate 180 are the positions of the right eye image generation region 162 and the left eye image generation region 164 of the image generation unit 160, as shown in FIG. And corresponds to the size. Therefore, in the usage state of the image display device 100, the right-eye image light transmitted through the right-eye image generation region 162 is incident on the first polarization region 182 and the left-eye image generation region 164 is incident on the second polarization region 184. The left-eye image light that has passed through is incident.

  The first polarizing region 182 transmits the incident right eye image light as it is without rotating the polarization axis thereof. The second polarization region 184 rotates the polarization axis of the incident left-eye image light in a direction orthogonal to the polarization axis of the right-eye image light incident on the first polarization region 182. Therefore, the polarization axis of the right-eye image light transmitted through the first polarization region 182 and the polarization axis of the left-eye image light transmitted through the second polarization region 184 are orthogonal to each other. Here, the second polarization region 184 of the polarization axis control plate 180 has a characteristic that the direction of the polarization axis of the transmitted light is slightly different depending on the color (wavelength) of the incident light, but when the incident light is green light. Is preferably designed so that the polarization axis of the green light is rotated in a direction more strictly perpendicular to the polarization axis of the light incident on the first polarization region 182. For example, transparent glass or resin is used for the first polarizing region 182, and a half-wave plate is used for the second polarizing region 184, for example.

  The horizontal diffusing plate 190 diffuses the right-eye image light and the left-eye image light transmitted through the first polarizing region 182 and the second polarizing region 184 of the polarization axis control plate 180 in the horizontal direction. As the horizontal diffusion plate 190, for example, a lenticular lens sheet in which a plurality of kamaboko-shaped convex lenses extending in the vertical direction are arranged in the horizontal direction is used.

  When observing a stereoscopic image, the observer 500 observes the right-eye image light and the left-eye image light projected from the image display device 100 with polarized glasses 600 as shown in FIG. The polarizing glasses 600 include a right polarizing lens 612 disposed on the right eye side of the observer 500 and a left polarizing lens 614 disposed on the left eye side. The right polarizing lens 612 transmits light having the same polarization axis direction as that of the right-eye image light, and blocks polarized light orthogonal to this direction. The left polarizing lens 614 transmits light whose polarization axis direction is the same as that of the image light for the left eye, and blocks polarized light orthogonal to this direction.

  When the image display device 100 is in use, the observer 500 puts the image on the polarizing glasses 600 within the range in which the right-eye image light and the left-eye image light are diffused by the horizontal diffusion plate 190. By observing the display device 100, only the right eye image light can be observed with the right eye, and only the left eye image light can be observed with the left eye. Therefore, the observer 500 can recognize these right-eye image light and left-eye image light as a stereoscopic image.

  The first polarization region 182 of the polarization axis control plate 180 rotates the direction of the polarization axis of incident light by 45 degrees, and the second polarization region 184 sets the direction of the polarization axis of incident light to the first polarization region. The rotation direction may be 45 degrees opposite to the rotation direction of 182. In addition, the polarization axis control plate 180 may emit incident light as circularly polarized light whose rotation directions of the polarization axes are opposite to each other. In this case, for example, the first polarization region 182 emits incident light as circularly polarized light whose polarization axis is clockwise, and the second polarization region 184 emits incident light as circularly polarized light whose polarization axis is counterclockwise.

  FIG. 3 is a block diagram showing a configuration of the manufacturing apparatus 10 of the present embodiment. The manufacturing apparatus 10 is an apparatus that manufactures the image display apparatus 100, and includes an assembly station 20 and a control unit 90 as shown in FIG. The assembly station 20 includes a case preparation unit 25, a light source preparation unit 30, a condensing lens preparation unit 35, an image generation unit preparation unit 40, a polarization axis control plate preparation unit 45, a temporary placement unit 50, an adjustment image generation unit 55, The light source light incident unit 60, the image observation unit 65, the position adjustment unit 70, and the attachment unit 80 are included. The control unit 90 is electrically connected to the above-described units of the assembly station 20, receives various signals from these units, and controls these operations.

  The case preparation unit 25, the light source preparation unit 30, the condensing lens preparation unit 35, the image generation unit preparation unit 40, and the polarization axis control plate preparation unit 45 each have a conveyor (not shown) that connects the outside and the assembly station 20. Then, the case 110, the light source 120, the condenser lens 130, the polarizing plate 150, the image generation unit 160, the polarizing plate 170, and the polarization axis control plate 180 are supplied to the assembly station 20. In addition, although the image generation part preparation part 40 supplies the polarizing plate 150, the image generation part 160, and the polarizing plate 170 to the assembly station 20, you may supply after assembling these outside. The light source preparation unit 30, the condensing lens preparation unit 35, and the image generation unit preparation unit 40 each have a robot arm or the like that holds the supply member, and the light source 120 and the condensing lens 130 supplied to the assembly station 20. The polarizing plate 150, the image generation unit 160, and the polarizing plate 170 are attached to the case 110. The temporary placement unit 50 includes a robot arm or the like that holds the polarization axis control plate 180, and the polarization axis control plate 180 supplied from the outside by the polarization axis control plate preparation unit 45 is temporarily placed on a temporary placement table 52 described later. Put.

  FIG. 4 is a schematic diagram of the manufacturing apparatus 10 in a state where the polarization axis control plate 180 is temporarily placed on the temporary placement table 52 by the temporary placement unit 50. As shown in FIG. 4, in a state where the polarization axis control plate 180 is temporarily placed, the light source 120, the condenser lens 130, the polarizing plate 150, the image generating unit 160, and the polarizing plate 170 are placed on the table 22 of the assembly station 20. A case 110 to which is attached is placed. The temporary table 52 has an opening 51 on the lower side, and the first polarization region 182 and the second polarization region 184 of the polarization axis control plate 180 are formed on the upper side of the case 110 to generate the right eye image of the image generation unit 160. The region 162 and the left eye image generation region 164 are arranged at positions facing each other.

  As shown in FIG. 4, the adjusted image generation unit 55 includes an image information output unit 56 and an image information storage unit 58, and is electrically connected to the image generation unit 160. When the control unit 90 receives a signal indicating that the polarization axis control plate 180 is temporarily placed on the temporary placement table 52 from the temporary placement unit 50, the control unit 90 sends an image to the image information output unit 56 of the adjusted image generation unit 55. A signal to generate different adjustment images is sent to at least a part of the right eye image generation area 162 and the left eye image generation area 164 of the generation unit 160. Upon receiving this signal, the image information output unit 56 acquires information on the adjusted image from the image information storage unit 58, and generates the first adjusted image generation region 282 and the left eye image generation that are part of the right eye image generation region 162. Different adjusted images are generated in the second adjusted image generation region 284 that is a part of the region 164. The first adjusted image generation region 282 and the second adjusted image generation region 284 will be separately described with reference to the drawings after FIG.

  As illustrated in FIG. 4, the light source light incident unit 60 includes a power supply unit 61 and a light amount adjustment unit 63 and is electrically connected to the light source 120. When the control unit 90 receives a signal indicating that different adjustment images are generated in the first adjustment image generation region 282 and the second adjustment image generation region 284 from the adjustment image generation unit 55, the light source light incident unit 60. The power source unit 61 is turned on to send a signal indicating that light is incident on the image generation unit 160 by turning on the light source 120. Upon receiving this signal, the power supply unit 61 acquires information on the optimum light amount of the light source 120 from the light amount adjustment unit 63 and turns on the light source 120.

  As shown in FIG. 4, the image observation unit 65 includes an imaging device 67 and a determination unit 68 and is disposed above the polarization axis control plate 180 temporarily placed on the temporary placement table 52. A polarizing plate 66 that transmits light having the same polarization characteristics as the light transmitted through the first polarization region 182 of the polarization axis control plate 180 is attached to the lower surface (imaging surface) of the imaging device 67. That is, when the light transmitted through the first polarization region 182 of the polarization axis control plate 180 is linearly polarized light, the polarizing plate 66 has the same polarization direction as that of the linearly polarized light transmitted through the first polarization region 182. A polarizing plate that transmits certain linearly polarized light is used. When the light transmitted through the first polarization region 182 of the polarization axis control plate 180 is clockwise (left-handed) circularly polarized light, the polarizing plate 66 has the circularly polarized light transmitted through the first polarization region 182. A polarizing plate that transmits circularly polarized light having the same rotational direction as the rotational direction is used. When the control unit 90 receives a signal indicating that the light source 120 has been turned on from the light source light incident unit 60, the control unit 90 transmits a polarization axis control plate to the imaging device 67 of the image observation unit 65 via the polarizing plate 66. A signal indicating that the adjustment image transmitted through the 180 first polarization regions 182 is observed is transmitted. Upon receiving this signal, the imaging device 67 starts observing the adjusted image.

  FIG. 5 is a schematic top view of the vicinity of the temporary table 52 in a state where the light source 120 is turned on by the light source light incident unit 60. In the example shown in FIG. 5, the adjusted image generation unit 55 adjusts the first adjusted image generation region 282 that is a part of the right eye image generation region 162 in the region 281 corresponding to the upper half of the image generation unit 160. An image, for example, a solid red image is generated. Further, the adjusted image generation unit 55 applies an adjustment image, for example, a green single color, to the second adjustment image generation region 284 that is a part of the left eye image generation region 164 in the region 283 corresponding to the lower half of the image generation unit 160. A solid image is generated. Here, the adjustment image generation unit 55 generates adjustment images in the left eye image generation region 164 in the region 281 corresponding to the upper half of the image generation unit 160 and the right eye image generation region 162 in the region 283 corresponding to the lower half. do not do.

  When the light source 120 is turned on by the light source light incident unit 60 and the polarization axis control plate 180 temporarily placed on the temporary stand 52 is viewed from above, an adjustment image as shown in FIG. 5 is observed. That is, a solid image of red single color is observed in the first adjustment image generation region 282 that is a part of the right eye image generation region 162 in the region 281 corresponding to the upper half of the image generation unit 160 via the polarization axis control plate 180. . Similarly, a solid green image is observed in the second adjustment image generation region 284 that is a part of the left eye image generation region 164 in the region 283 corresponding to the lower half of the image generation unit 160. On the other hand, the left eye image generation region 164 in the region 281 corresponding to the upper half of the image generation unit 160 and the right eye image generation region 162 in the region 283 corresponding to the lower half are observed in black.

  FIG. 6 shows an example of an adjustment image captured by the imaging device 67 via the polarizing plate 66. In the state described above and shown in FIG. 5, when the imaging device 67 images the polarization axis control plate 180 from above via the polarizing plate 66, the first polarization in the polarization axis control plate 180 temporarily placed on the temporary placement table 52. When each of the region 182 and the second polarization region 184 completely faces the right eye image generation region 162 and the left eye image generation region 164 in the lower image generation unit 160, the light from the first adjusted image generation region 282 is The direction of polarized light is incident on the polarizing plate 66 without being rotated by the first polarizing region 182. Thereby, the light from the first adjusted image generation region 282 passes through the polarizing plate 66. On the other hand, the light from the second adjusted image generation region 284 is incident on the polarizing plate 66 with the polarization direction rotated by the second polarizing region 184. Thereby, the light from the second adjusted image generation region 284 is blocked by the polarizing plate 66. Therefore, in this case, a solid red image from the region 281 is observed, and the other regions are observed in black.

  On the other hand, as shown in FIG. 6, for example, leakage light 294 may be observed at the upper right of the second adjusted image generation region 284 in the region 283. The leakage light 294 is incident on the right-eye image light that has passed through the right-eye image generation region 162 of the image generation unit 160 from the lower part of the second adjustment image generation region 284 that is a part of the second polarization region 184. It is the light observed by this. In this case, the first polarization region 182 and the second polarization region 184 in the polarization axis control plate 180 temporarily placed on the temporary placement table 52 are respectively connected to the right eye image generation region 162 and the left eye in the lower image generation unit 160. The image generation region 164 is not completely opposed, that is, a “positional deviation” in the plane direction occurs between the polarization axis control plate 180 and the image generation unit 160. The imaging device 67 outputs an imaging result as shown in FIG. When the imaging result is input, the determination unit 68 determines that there is a “positional deviation” in the plane direction between the polarization axis control plate 180 and the image generation unit 160 and the position of the leaked light 294. Such information is output to the control unit 90.

  Here, as shown in FIGS. 4 to 6, the temporary table 52 has a circular outer shape, and has a circular guide rail 71 on the lower surface thereof. The guide rail 71 is slidably fitted in a circular guide groove 73 formed on the upper surface of a rectangular table 72 arranged below the temporary table 52. The table 72 has a linear guide rail 74 on its lower surface. The guide rail 74 is slidably fitted in a linear guide groove 76 formed on the upper surface of the table 75 disposed below the table 72. Further, the temporary placement table 52 and the table 72 are connected to the position adjusting unit 70 having a driving unit (not shown). When the information is input from the determination unit 68, the control unit 90 outputs a drive signal to the position adjustment unit 70. Upon receiving this signal, the position adjustment unit 70 rotates the temporary table 52 and moves the table 72 in the vertical direction in FIG. The position adjustment unit 70 corrects the “positional deviation” in the plane direction between the polarization axis control plate 180 and the image generation unit 160 until the leakage light 294 is no longer observed by the imaging device 67. When the correction of the “positional deviation” in the plane direction between the polarization axis control plate 180 and the image generation unit 160 is completed, the position adjustment unit 70 outputs a signal to that effect to the control unit 90.

  When the control unit 90 receives the signal from the position adjustment unit 70, the control unit 90 sends a signal to the case 110 to fix the polarization axis control plate 180 to the case 110. Upon receiving this signal, the mounting portion 80 transports the polarization axis control plate 180 from the temporary placement table 52 to a position close to the polarizing plate 170 on the case 110 and then fixes it to the case 110. For example, a robot arm or the like is used for the attachment portion 80.

  As described above, according to the manufacturing apparatus 10 of the present embodiment, the right eye image generation region 162 and the left eye image generation region 164 in the image generation unit 160 correspond to the first polarization region 182 and the second polarization in the polarization axis control plate 180, respectively. The polarization axis control plate 180 can be accurately and easily positioned with respect to the image generation unit 160 so as to be accurately arranged at a position facing one of the regions 184.

  In addition, the case preparation unit 25, the light source preparation unit 30, the condensing lens preparation unit 35, the image generation unit preparation unit 40, the polarization axis control plate preparation unit 45, the temporary placement unit 50, the adjustment image generation unit 55, the manufacturing apparatus 10 described above. The operations of the light source light incident unit 60, the image observation unit 65, the position adjustment unit 70, and the attachment unit 80 may be performed manually by wearing a pair of polarized glasses with a polarizing plate 66. In this case, it is preferable that the adjustment images generated in the first adjustment image generation region 282 and the second adjustment image generation region 284 have different colors. For example, a red adjustment image may be generated in the first adjustment image generation region 282, and a green adjustment image may be generated in the second adjustment image generation region 284. As another example, a combination of colors that are complementary to each other, for example, a red adjustment image is generated in the first adjustment image generation region 282, and a blue-green adjustment image is generated in the second adjustment image generation region 284. May be. Thus, whether or not the light transmitted through the polarizing plate 66 is only the light transmitted through one of the right eye image generating region 162 and the left eye image generating region 164 is easily identified by the color of the light transmitted through the polarizing plate 66. be able to.

  Further, the area adjacent to the first adjustment image generation area 282 and the second adjustment image generation area 284 and the peripheral area 285 in which no adjustment image is generated in the image generation unit 160 shown in FIGS. 5 and 6 are black. Preferably there is. Thereby, the light of the said adjacent area | region and the peripheral area | region 285 does not enter into eyes, but can identify more correctly. However, the present invention is not limited to this, and the entire right eye image generation area 162 may be the first adjustment image generation area 282, and similarly, the entire left eye image generation area 164 may be the second adjustment image generation area 284.

  As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above-described embodiment. It is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

It is a disassembled perspective view of the image display apparatus 100 manufactured with the manufacturing apparatus 10 of this embodiment. 2 is a schematic view showing a usage state of the image display apparatus 100. FIG. It is a block diagram which shows the structure of the manufacturing apparatus 10 of this embodiment. FIG. 2 is a schematic view of the manufacturing apparatus 10 in a state where a polarization axis control plate 180 is temporarily placed on a temporary placement table 52 by a temporary placement unit 50. FIG. 6 is a schematic top view of the vicinity of the temporary table 52 in a state where the light source 120 is turned on by the light source light incident unit 60. An example of an adjustment image captured by the imaging device 67 via the polarizing plate 66 is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Manufacturing apparatus, 20 Assembly station, 22 Table, 25 Case preparation part, 30 Light source preparation part, 35 Condensing lens preparation part, 40 Image generation part preparation part, 45 Polarization axis control board preparation part, 50 Temporary placement part, 51 Opening , 52 Temporary placement table, 55 Adjustment image generation unit, 56 Image information output unit, 58 Image information storage unit, 60 Light source light incident unit, 61 Power supply unit, 63 Light amount adjustment unit, 65 Image observation unit, 66 Polarizing plate, 67 Imaging Device, 68 Determination unit, 70 Position adjustment unit, 71, 74 Guide rail, 72, 75 Table, 73, 76 Guide groove, 77 Position adjustment information acquisition unit, 80 Mounting unit, 90 Control unit, 100 Image display device, 110 Case , 120 light source, 130 condenser lens, 150 polarizing plate, 160 image generation unit, 162 right eye image generation region, 164 left eye image generation region , 170 Polarizing plate, 180 Polarization axis control plate, 182 First polarization region, 184 Second polarization region, 190 Horizontal diffuser plate, 281, 283 region, 282 First adjustment image generation region, 284 Second adjustment image generation region, 285 Peripheral area, 294 Leakage light, 500 observer, 600 Polarized glasses, 612 Right polarized lens, 614 Left polarized lens

Claims (13)

A method of manufacturing an image display device that displays a stereoscopic image by projecting a right-eye image and a left-eye image to an observer,
An image generating unit preparing stage for preparing an image generating unit having a right eye image generating region for generating a right eye image and a left eye image generating region for generating a left eye image;
A first polarizing region provided corresponding to the right-eye image generating region; and a second polarizing region provided corresponding to the left-eye image generating region; and polarized in the first polarizing region and the second polarizing region. When linearly polarized light whose axis is in a specific direction is incident, the output light from the first polarization region and the output light from the second polarization region are linearly polarized light whose polarization axes are orthogonal to each other, or the rotation direction of the polarization axis A polarization axis control plate preparation stage for preparing a polarization axis control plate for circularly polarized light whose directions are opposite to each other;
Temporary placement stage of temporarily placing the polarization axis control plate on the side of the image generator that the observer observes;
An adjustment image generation step of generating different adjustment images in at least a part of the right eye image generation region and the left eye image generation region in the image generation unit;
A light source light incident stage in which light is incident from a side opposite to the side observed by the observer in the image generation unit;
The adjustment transmitted through the polarization axis control plate through a polarizing plate that transmits one of the light emitted from the first polarization region and the light emitted from the second polarization region of the polarization axis control plate. An image observation stage for observing the image;
In the image observation step,
When observing the adjustment image transmitted through the polarization axis control plate through a polarizing plate that transmits light having a polarization axis parallel to the polarization axis of the light transmitted through the first polarization region of the polarization axis control plate. The position of the polarization axis control plate is moved relative to the image generation unit until the adjustment image generated in the left eye image generation region and transmitted through the first polarization region of the polarization axis control plate is not observed. And
When observing the adjustment image transmitted through the polarization axis control plate through a polarizing plate that transmits light having a polarization axis parallel to the polarization axis of the light transmitted through the second polarization region of the polarization axis control plate. The position of the polarization axis control plate is moved relative to the image generation unit until the adjusted image generated in the right eye image generation region and transmitted through the second polarization region of the polarization axis control plate is not observed. And a position adjustment step of adjusting and fixing the position of the polarization axis control plate with respect to the image generation unit.   2. The image display device according to claim 1, wherein in the adjustment image generation step, the adjustment images generated in each of the right eye image generation region and the left eye image generation region in the image generation unit are images of different colors. Production method.   3. The image display device according to claim 2, wherein, in the adjustment image generation step, colors of the adjustment image generated in each of the right eye image generation region and the left eye image generation region in the image generation unit are complementary colors. Method.   4. The color of the adjustment image generated in each of the right eye image generation region and the left eye image generation region in the image generation unit in the adjustment image generation step is one of green. Manufacturing method of the image display apparatus. In the step of preparing the polarization axis control plate, the one of the first polarizing region and the second polarizing region transmits the linearly polarized light as it is when the linearly polarized light is incident thereon, and the first polarizing region and The other of the second polarizing regions is a direction perpendicular to the polarization axis of the linearly polarized light incident on the first polarizing region when the green linearly polarized light is incident on the green. Preparing the polarization axis control plate to be rotated,
In the adjustment image generation step, one of the colors of the adjustment image generated in each of the right eye image generation region and the left eye image generation region in the image generation unit is green,
The temporary placement step temporarily places the second polarization region of the polarization axis control plate at a position corresponding to the one of the right eye image generation region and the left eye image generation region of the image generation unit. The manufacturing method of the image display apparatus in any one of.   6. The method for manufacturing an image display device according to claim 1, wherein in the adjustment image generation step, a peripheral region other than the partial region in which the adjustment image is generated in the image generation unit is black. A method of manufacturing an image display device that displays a stereoscopic image by projecting a right-eye image and a left-eye image to an observer,
An image generating unit preparing stage for preparing an image generating unit having a right eye image generating region for generating a right eye image and a left eye image generating region for generating a left eye image;
A first polarization region provided corresponding to the right eye image generation region; a second polarization region provided corresponding to the left eye image generation region; and the first polarization region and the second polarization region. When linearly polarized light having a specific direction of polarization is incident on the light, the outgoing light from the first polarizing region and the outgoing light from the second polarizing region are converted into linearly polarized light whose polarization axes are orthogonal to each other, or A polarization axis control plate preparation stage for preparing a polarization axis control plate for circularly polarized light whose rotation directions are opposite to each other;
Temporary placement stage of temporarily placing the polarization axis control plate on the side of the image generator that the observer observes;
The one of the right eye image generation region and the left eye image generation region while generating an adjustment image in at least a part of one of the right eye image generation region and the left eye image generation region in the image generation unit. An adjustment image generation stage that does not generate the adjustment image in the other of the right eye image generation region and the left eye image generation region adjacent to the partial region of
A light source light incident stage in which light is incident from a side opposite to the side observed by the observer in the image generation unit;
A polarizing plate that transmits outgoing light from one of the first polarization region and the second polarization region of the polarization axis control plate corresponding to the other of the right-eye image generation region and the left-eye image generation region. An image observation stage for observing the adjustment image transmitted through the polarization axis control plate,
In the image observation step, when the adjustment image generated in the one partial region of the right eye image generation region and the left eye image generation region is observed through the polarizing plate, The position of the polarization axis control plate with respect to the image generation unit is moved by moving the position of the polarization axis control plate relative to the image generation unit until the adjustment image generated in a part of the region is not observed. A position adjustment step of adjusting and fixing the image display device.   In the adjustment image generation step, the adjustment image generation unit further generates the adjustment image in at least a partial region of the one of the right eye image generation region and the left eye image generation region in the image generation unit, and The adjusted image generated in the partial region of the right eye image generation region without generating the adjustment image in the other of the right eye image generation region and the left eye image generation region adjacent to the region, and the left eye The method for manufacturing an image display device according to claim 7, wherein the adjustment image generated in the partial area of the image generation area is an image of a different color.   In the adjusted image generation step, colors of the adjusted image generated in each of the partial region of the right eye image generation region and the partial region of the left eye image generation region in the image generation unit are complementary colors. A method for manufacturing an image display device according to claim 8.   The color of the adjustment image generated in the one partial region of the one of the right eye image generation region and the left eye image generation region in the image generation unit in the adjustment image generation step is green. The manufacturing method of the image display apparatus in any one. In the step of preparing the polarization axis control plate, the one of the first polarizing region and the second polarizing region transmits the linearly polarized light as it is when the linearly polarized light is incident thereon, and the first polarizing region and The other of the second polarizing regions is a direction perpendicular to the polarization axis of the linearly polarized light incident on the first polarizing region when the green linearly polarized light is incident on the green. Preparing the polarization axis control plate to be rotated,
In the adjustment image generation step, the color of the adjustment image generated in the one partial region of the right eye image generation region and the left eye image generation region in the image generation unit is green,
In the temporary placement step, the second polarization region of the polarization axis control plate is temporarily placed at a position corresponding to the one of the right eye image generation region and the left eye image generation region in the image generation unit of the image generation unit. The manufacturing method of the image display apparatus in any one of Claim 7 to 9. An apparatus for manufacturing an image display device that displays a stereoscopic image by projecting a right-eye image and a left-eye image to an observer,
An image generating unit preparing unit for preparing an image generating unit having a right eye image generating region for generating a right eye image and a left eye image generating region for generating a left eye image;
A first polarizing region and a second polarizing region provided corresponding to the right-eye image generating region and the left-eye image generating region, the polarization axis of light incident on the first polarizing region and the second polarizing region; A polarization axis control plate preparation unit that prepares a polarization axis control plate that makes the polarization axes of incident light orthogonal to each other;
A temporary placement unit that temporarily places the polarization axis control plate on the side of the image generation unit observed by the observer;
An adjustment image generation unit that generates different adjustment images in at least a part of the right eye image generation region and the left eye image generation region in the image generation unit;
A light source light incident part for allowing light to be incident from a side opposite to the side observed by the observer in the image generation unit;
The polarization axis control plate is transmitted through a polarizing plate that transmits light having a polarization axis parallel to the polarization axis of the light transmitted through either the first polarization region or the second polarization region of the polarization axis control plate. An image observation unit for observing the adjusted image,
In the image observation unit,
When observing the adjustment image transmitted through the polarization axis control plate through a polarizing plate that transmits light having a polarization axis parallel to the polarization axis of the light transmitted through the first polarization region of the polarization axis control plate. The position of the polarization axis control plate is moved relative to the image generation unit until the adjustment image generated in the left eye image generation region and transmitted through the first polarization region of the polarization axis control plate is not observed. And
When observing the adjustment image transmitted through the polarization axis control plate through a polarizing plate that transmits light having a polarization axis parallel to the polarization axis of the light transmitted through the second polarization region of the polarization axis control plate. The position of the polarization axis control plate is moved relative to the image generation unit until the adjusted image generated in the right eye image generation region and transmitted through the second polarization region of the polarization axis control plate is not observed. And a position adjusting unit that fixes and adjusts the position of the polarization axis control plate with respect to the image generating unit. An apparatus for manufacturing an image display device that displays a stereoscopic image by projecting a right-eye image and a left-eye image to an observer,
An image generating unit preparing unit for preparing an image generating unit having a right eye image generating region for generating a right eye image and a left eye image generating region for generating a left eye image;
A first polarizing region and a second polarizing region provided corresponding to the right-eye image generating region and the left-eye image generating region, the polarization axis of light incident on the first polarizing region and the second polarizing region; A polarization axis control plate preparation unit that prepares a polarization axis control plate that makes the polarization axes of incident light orthogonal to each other;
A temporary placement unit that temporarily places the polarization axis control plate on the side of the image generation unit observed by the observer;
The one of the right eye image generation region and the left eye image generation region while generating an adjustment image in at least a part of one of the right eye image generation region and the left eye image generation region in the image generation unit. An adjustment image generation unit that does not generate the adjustment image in the other of the right eye image generation region and the left eye image generation region adjacent to the partial region of
A light source light incident part for allowing light to be incident from a side opposite to the side observed by the observer in the image generation unit;
Parallel to the polarization axis of light transmitted through one of the first polarization region and the second polarization region of the polarization axis control plate corresponding to the other of the right eye image generation region and the left eye image generation region. An image observation unit for observing the adjustment image transmitted through the polarization axis control plate through a polarizing plate that transmits light of the polarization axis;
In the image observation unit, when the adjustment image generated in the partial region of the one of the right eye image generation region and the left eye image generation region is observed through the polarizing plate, The position of the polarization axis control plate with respect to the image generation unit is moved by moving the position of the polarization axis control plate relative to the image generation unit until the adjustment image generated in a part of the region is not observed. In the position adjustment unit and the image observation unit that are fixed after adjusting
When observing the adjustment image transmitted through the polarization axis control plate through a polarizing plate that transmits light having a polarization axis parallel to the polarization axis of the light transmitted through the first polarization region of the polarization axis control plate. The position of the polarization axis control plate is moved relative to the image generation unit until the adjustment image generated in the left eye image generation region and transmitted through the first polarization region of the polarization axis control plate is not observed. And
When observing the adjustment image transmitted through the polarization axis control plate through a polarizing plate that transmits light having a polarization axis parallel to the polarization axis of the light transmitted through the second polarization region of the polarization axis control plate. The position of the polarization axis control plate is moved relative to the image generation unit until the adjusted image generated in the right eye image generation region and transmitted through the second polarization region of the polarization axis control plate is not observed. And a position adjusting unit that fixes and adjusts the position of the polarization axis control plate with respect to the image generating unit.

Images