JP4580953B2 - Image display device - Google Patents

Description

  The present invention relates to an image display device, and more particularly to an image display device that allows an observer to stereoscopically view without wearing special glasses.

  Conventionally, so-called 3D image display devices that allow a display image to be seen in three dimensions have been developed. For example, a parallax barrier method, a lenticular method, There is an image display device based on a method (for example, refer to Patent Document 1) that expands a stereoscopically visible range and can display a normal planar image.

JP-A-8-262370 (2nd page, FIG. 3)

  This 3D image display device includes a plurality of polarizing plates so that it can be viewed stereoscopically using binocular parallax, and the light from the light emitting element is polarized multiple times in different directions on the left and right sides. Yes. In this image display device, a left-eye light-emitting element and a right-eye light-emitting element are arranged in parallel, and a left-eye light source and a right-eye light source are obtained from the light-emitting elements. A right-eye polarizing filter and a left-eye polarizing filter are provided side by side on the optical path.

  However, since the light emitted from the light emitting element has a spread, in the vicinity of the boundary between the right-eye polarization filter and the left-eye polarization filter, the polarization cannot be specified by the polarization filter corresponding to each light source. That is, the light from the light emitting element spreads between the light emitting element and the polarizing filter, and the light polarized for the right eye cannot be distinguished from the light polarized for the left eye. Therefore, the light from the right-eye light-emitting element presents an image for the left eye, or the light from the left-eye light-emitting element presents an image for the right eye, and is presented to one observation eye. This causes a so-called crosstalk in which the image to be leaked to the other observation eye, which is an obstacle to stereoscopic image observation.

  In addition, since the light source acts as the left eye light source or the right eye light source depending on whether the left eye polarizing filter or the right eye polarizing filter is transmitted, the right eye polarization filter is used. When a boundary portion between the filter and the polarizing filter for the left eye is shifted, a suitable observation position is also shifted in the left-right direction. This imposes an unreasonable posture on the observer and is not a preferable observation condition.

  Accordingly, the present invention has been made in view of the above circumstances, and an object of the present invention is to provide an image display apparatus that suppresses so-called crosstalk of images and easily establishes suitable stereoscopic image observation conditions. .

The present invention has been proposed in order to achieve the above object, and the liquid crystal display panel according to claim 1 is capable of transmitting light irradiated from the back.
A light source that irradiates the liquid crystal display panel with light having a specific polarization direction and light having a polarization direction orthogonal to the specific polarization direction;
A first region disposed between the liquid crystal display panel and the light source and transmitting light of the specific polarization direction; and a second region transmitting light of a polarization direction orthogonal to the specific polarization direction. A filter provided repeatedly in the vertical direction,
The light source includes a long light emitting source that emits light from which a polarization direction is not specified from a light emitting element, light that is not specified by the polarization direction, and light that is orthogonal to the specific polarization direction. An image comprising: polarization means for converting light into a direction of light and outputting; and optical means for refracting light of different polarization directions in directions to reach the left and right eyes and irradiating the liquid crystal display panel. In the display device,
The polarizing means is a translucent plate that is long in the same direction as the light-emitting source, and is a first polarizing filter for the left eye located on one side in the longitudinal direction and a right-eye plate located on the other side in the longitudinal direction. It consists of polarizing plates with different polarization directions from each other with the second polarizing filter,
The light-emitting source includes a polarizing plate holding frame that holds the polarizing plate and holds the polarizing plate,
The polarizing plate holding frame is
A polarizing aperture that is blocked by the mounted polarizing plate, and a polarizing plate support bar installed across the polarizing aperture in a state of crossing the polarizing aperture in the width direction,
Light that is emitted from the light emitting element by the polarizing plate support bar is disposed at a position where the boundary between the first polarizing filter and the second polarizing filter overlaps the polarizing plate support bar and the polarizing plate is mounted on the polarizing plate holding frame. Is divided into light incident on the first polarizing filter and light incident on the second polarizing filter.

According to a second aspect of the present invention, the light emitting source is a linear light emitting source that is configured by a plurality of point light emitting elements arranged in a line and emits light in a linear shape.
The image display apparatus according to claim 1, wherein the polarizing plate support bar is provided between the optical axes of the adjacent point light emitting elements among the point light emitting elements.

  The image display device according to claim 1, wherein the polarizing plate holding frame includes a plurality of polarizing plate presses that hold the polarizing plate around the polarizing aperture. It is.

According to a fourth aspect of the present invention, the first polarizing filter and the second polarizing filter are formed by stretching in a state where a polarizing element and a polarizing substrate are laminated,
The polarizing plate includes the first polarizing filter and the second polarizing filter in a state in which the respective stretching axis directions are substantially symmetrical with respect to the longitudinal direction of the polarizing plate with respect to the boundary between the first polarizing filter and the second polarizing filter. Provided,
The polarizing plate holding frame is in a state of being substantially symmetrical in the longitudinal direction of the polarizing plate with respect to the polarizing plate support bar at a position where the polarizing plate supporting press is pressed at least on both sides and the center in the longitudinal direction of the polarizing plate. The image display device according to claim 3, wherein the image display device is arranged.

According to a fifth aspect of the present invention, the polarizing plate holding frame includes a polarizing plate stopper protruding upward from both ends in the longitudinal direction of the polarizing aperture,
The polarizing plate stopper is in contact with both ends in the longitudinal direction of the polarizing plate in an obtuse angle with respect to the polarizing plate mounting surface of the polarizing plate holding frame. It is an image display apparatus of description.

As described above, the present invention has the following effects.
That is, according to the first aspect of the present invention, the polarizing means is a translucent plate that is long in the same direction as the light emitting source, and is a first polarizing filter for the left eye located on one side in the longitudinal direction. It consists of a polarizing plate in which the polarization direction is different from each other with the second polarizing filter for the right eye located on the other side in the longitudinal direction, and the light emitting source includes a polarizing plate holding frame that holds and holds the polarizing plate, The polarizing plate holding frame includes a polarizing aperture that is blocked by the mounted polarizing plate, and a polarizing plate support bar that is installed across the polarizing aperture in a state of crossing the polarizing aperture in the width direction, and includes the first polarizing filter and the first polarizing filter. The polarizing plate is mounted on the polarizing plate holding frame with the boundary with the two polarizing filters overlapping the polarizing plate support bar, and the light emitted from the light emitting element is incident on the first polarizing filter by the polarizing plate support bar. And light entering the second polarizing filter Since it is possible to prevent the progression to polarized aperture light from the light emitting element located on one side of the polarizing plate supporting crosspiece is positioned on the other side. Therefore, so-called crosstalk in which an image presented to one observation eye leaks to the other observation eye can be suppressed, and conditions suitable for stereoscopic display can be easily established.

  According to the invention of claim 2, since the light emitting source is a linear light emitting source that is configured by a plurality of point light emitting elements arranged in a line and emits light in a linear shape, the point light emitting element is a liquid crystal. It is possible to realize an image display device that can display a clear stereoscopic image by reasonably arranging the display panel at a position suitable for light irradiation. In addition, it is possible to promote the fusion of the light of the adjacent point light emitting elements and eliminate the unevenness of the brightness of the light transmitted through the liquid crystal display panel.

  Furthermore, since the polarizing plate support bar is provided between the optical axes of the adjacent point light emitting elements among the point light emitting elements, the polarizing plate support bar is unlikely to disturb the incidence of light on the polarizing plate. Can be provided. Therefore, it is possible to display a clear stereoscopic image while suppressing the shadow of the polarizing plate support bar from appearing on the display unit.

  According to the invention of claim 3, since the polarizing plate holding frame has a plurality of polarizing plate presses for pressing the polarizing plate around the polarizing aperture, the polarizing plate is prevented from being deformed, and polarized light suitable for three-dimensional display is provided. Can be maintained. Therefore, it is possible to suppress the disturbance of the stereoscopic image.

  According to a fourth aspect of the present invention, the first polarizing filter and the second polarizing filter are formed by stretching in a state in which a polarizing element and a polarizing base material are laminated, and the polarizing plate is a first polarizing filter. And the second polarizing filter are provided in a state in which the respective stretching axis directions are substantially symmetric in the longitudinal direction of the polarizing plate with respect to the boundary between the first polarizing filter and the second polarizing filter, Since the polarizing plate support press is disposed at a position that holds at least the both sides and the center in the longitudinal direction of the polarizing plate in a state that is substantially symmetric with respect to the polarizing plate support rail, The force received from the polarizing plate holder can be balanced by being deformed in a substantially symmetrical state with respect to the boundary. Therefore, the boundary between the first polarizing filter and the second polarizing filter can be made difficult to deviate from the polarizing plate support bar, and the emission ratio of different polarized light can be maintained. From this, it is possible to stabilize a suitable observation position in the stereoscopic display and maintain good observation conditions.

  According to the invention described in claim 5, the polarizing plate holding frame includes a polarizing plate stopper protruding upward from both ends in the longitudinal direction of the polarizing aperture, and the polarizing plate stopper is a polarizing plate of the polarizing plate holding frame. Since it makes contact with both ends in the longitudinal direction of the polarizing plate at an obtuse angle with respect to the mounting surface, even if the polarizing plate expands in the longitudinal direction due to the heat of the light emitting element, the end of the polarizing plate is guided upward. You can escape. Therefore, the polarizing plate can be prevented from being bent, or the boundary between the first polarizing filter and the second polarizing filter and the polarizing plate support bar can be prevented from being displaced, and polarized light suitable for stereoscopic display can be maintained. .

  Hereinafter, an embodiment in which an image display device is provided in a pachinko gaming machine that is a typical gaming machine will be described with reference to the drawings. FIG. 1 is a front view of a game board of a pachinko machine.

  As shown in FIG. 1, a game board 1 of a pachinko machine has a decorative cell sheet 4 with a decorative pattern printed on a surface of a rectangular game board body 2 made of plywood or plastic, A substantially circular gaming area 7 is defined by fixing the guide rail 5 and the gaming area partitioning member 6 and the like from the top of the cell sheet 4. In the gaming area 1, a center case 8 is disposed from substantially the center to the opposite side of the guide rail 5 (right side in the figure) in the gaming area 7. The image display device (variable display device) 9 is provided on the front surface so as to be positioned at approximately the center of the front. In addition, the game board 1 has a tulip-type start winning tool (one of the winning tools) 10 provided below the image display device 9, and the operation result of the image display device 9 below the start winning tool 10. A special variable winning device (large winning opening) 11 that can be converted into a first state that does not accept a game ball and a second state that is easy to accept is provided. In addition, the game board 1 includes a general winning device (one of the winning devices) 12, a windmill 13 that changes the flow direction of the game ball, obstacle nails (not shown), and lamps that display various decorations by light emission. The LED 14 and an out port 15 for collecting game balls that have flowed down without winning are provided. The image display device 9 will be described in detail later.

  As shown in FIG. 2, the center case 8 is a device having a rectangular opening window 18 in the center. The center case 8 includes an attachment board 19 that is attached to the surface of the game board 1, and an armor portion 20 that imitates waves splashes forward on the attachment substrate 19. A decorative part in which a vertically long side part 21 is extended downward from the inclined end part (left side in the figure), and a Ukiyo-e portrait is formed on the opposite side (right side in the figure) 22 is mounted in a state of protruding forward from the mounting substrate 19, and a bottom portion 23 is disposed in a state where the lower end of the side portion 21 and the lower end of the decorative portion 22 are connected, and the armor portion 20, the side portion 21, and the decorative portion 22 and an opening window 18 is provided at a location surrounded by the bottom 23, and the image display device 9 faces the opening window 18 from the rear side. Note that the front surface of the armor portion 20 and the front surface of the decorative portion 22 are located in front of the mounting substrate 19 by substantially the same distance and are substantially on the same plane.

  Further, the center case 8 includes a game ball guide path (warp flow path) 25 for allowing a game ball to flow down from the upper surface of the center case 8 to the bottom 23 on the rear side of the decorative portion 22, and flows down above the center case 8. The game ball to be played can be guided to the bottom 23.

  The bottom portion 23 of the center case 8 includes a wavefront stage 26 on which a game ball can roll on the front side, and a wavelike substage 27 that is pivotally mounted on the rear upper side of the stage 26 and can swing left and right. It has. Furthermore, the bottom 23 is provided with a game ball path (ball path) penetrating from the upper side to the front side of the flow guide member 28 pivotally attached to the flow guide member 28 at the substantially center of the stage 26. The game ball that has rolled to the center periphery of the stage 26 is configured to fall from the approximate center of the bottom 23 and win the starting prize device 10 just below. The center case 8 can cause the game ball placed on the bottom 23 to roll in a complicated manner by alternately swinging the sub-stage 27 and the flow guide member 28 to the left and right.

  Further, the center case 8 forms a game ball flow path 30 in which game balls can flow one by one between the game area partition member 6 from the upper part to the right part of the decoration part 22. The decorative portion 22 includes a flow channel cover member 31 made of a transparent member in front of the game ball flow channel 30, and the gap 32 is formed by separating the tip of the flow channel cover member 31 from the game area partition member 6. The bottom portion 33 of the game ball flow path 30 is exposed from the gap portion 32.

Next, a specific structure of the image display device 9 will be described.
As shown in FIG. 3, the image display device 9 is housed together with a control board (not shown) in a transparent image display device case 36 to constitute an image display unit 37. Then, the game board 1 has such an image display unit 37 attached from the rear of the center case 8 so that the front surface of the image display device 9 faces the opening window 18 in a state protected by the image display case 36. ing.

  As shown in FIGS. 4 and 7, the image display device 9 includes a housing 40 formed of resin, a display unit 41 provided on the front surface of the housing 40, and a plurality of light emitting elements 42. The light emitting unit 43 (corresponding to the light emitting source of the present invention and the linear light emitting source of the present invention) housed in the housing 40 in a state in which the light is emitted, the reflecting mirror 44 that reflects the light from the light emitting unit 43 to the display unit 41, For example, a Fresnel lens 45 (corresponding to the optical means of the present invention) that refracts light that reaches one of the left and right eyes of the observer into, for example, substantially parallel light. The image display device 9 includes a light emitting unit 43, a polarizing filter 70 (described later) provided in the light emitting unit 43, and a Fresnel lens 45 to constitute a light source 39, and a liquid crystal display of the display unit 41. The panel 56 (described later) can be irradiated with light having a specific polarization direction and light having a polarization direction orthogonal to the specific polarization direction (see FIG. 14, which will be described in detail later).

  As shown in FIG. 5, the housing 40 has a rear case 46 having an opening at the front and a rear upper surface inclined downward, and a frame shape attached along the left and right sides and the upper opening edges of the rear case 46. The front frame 47 and a front cover 48 attached below the front frame 47 in a state of closing the lower opening of the rear case 46. The housing 40 has a large rectangular opening 49 in the front surface of the housing 40, that is, the front frame 47, and the diffuser 50 and the display unit 41 are attached in a state where the front side of the opening 49 is closed. The periphery of the diffuser 50 and the display unit 41 is fixed from the front by a frame-shaped display unit holding frame 51.

  The display unit 41 is a member that can transmit light from a light emitting unit 43 to be described later. From the light incident side of the light emitting unit 43, that is, from the back side (right side in the drawing) of the image display device 9, 54 (corresponding to a part of the filter of the present invention), a first polarizing sheet 55 (corresponding to a part of the filter of the present invention), a liquid crystal display panel 56, and a second polarizing sheet 57 are sequentially superposed. . That is, the fine retardation plate 54 and the first polarizing sheet 55 are disposed between the liquid crystal display panel 56 and the light source 39. The fine retardation plate 54 has first regions 54a and second regions 54b having different polarization characteristics, and is arranged in the vertical direction at substantially the same repetition pitch as the horizontal scanning lines of the liquid crystal display panel 56. . The first region 54a and the portion of the first polarizing sheet 55 facing the first region 54a transmit light polarized in a specific direction when irradiated with light emitted from the light emitting unit 43 described later. . The second region 54b and the portion of the first polarizing sheet 55 that faces the second region 54b are irradiated with light emitted from the light emitting unit 43. The polarization direction is orthogonal to the light having the specific polarization direction. Transmits light having The liquid crystal display panel 56 is a member that can transmit light emitted from the rear, displays an image for the left eye on a scanning line corresponding to the first region 54a of the fine phase difference plate 54, and the second region 54b. The right-eye image is displayed on the scanning line corresponding to. That is, the liquid crystal display panel 56 is configured to display the left-eye image and the right-eye image alternately in the vertical direction by one scanning line (see FIG. 6).

  Further, the housing 40 is attached with a Fresnel lens 45 (corresponding to the optical means of the present invention) in a state where the rear side of the opening 49 is closed, and the periphery of the Fresnel lens 45 is fixed from behind by the lens holder 61. . The Fresnel lens 45 is attached with the focal point located at the rear, and converts light incident from the rear into parallel light, in other words, the direction in which light having different polarization directions reaches the left and right eyes. The liquid crystal display panel 56 is arranged so as to be refracted and irradiated to the front display unit 41, that is, the liquid crystal display panel 56 (see FIG. 8).

  The reflecting mirror 44 is a mirror for reflecting light from the light emitting unit 43, which will be described later, to the display unit 41, and is attached in a state where it is inclined downward along the inclined wall portion 40a on the inner upper side of the housing 40. It has been. The reflecting mirror 44 reflects most of the light (about 90% to 95%) emitted from the light emitting element 42 of the light emitting unit 43 to the display unit 41 as reflected light, and is emitted from the light emitting element 42 of the light emitting unit 43. This is a surface reflecting mirror configured so that a part (approximately 10% to 5%) of the transmitted light can be transmitted to the back side as transmitted light. In addition, the casing 40 provided with the reflecting mirror 44, that is, the rear case 46, has a confirmation window 63 on the wall 40a located on the back side of the reflecting mirror 44 so that the transmitted light from the reflecting mirror 44 can be visually recognized. Thus, the lighting check of the light emitting element 42 in the light emitting unit 43 can be easily performed.

Next, the light emitting unit 43 will be described.
The light emitting unit 43 is a unit for irradiating the liquid crystal display panel 56 with light. The light emitting unit 43 is provided in the lower part inside the rear case 46, that is, behind the front cover 48 with the light emitting element 42 facing the reflecting mirror 44.

  Then, as shown in FIG. 7, the light emitting unit 43 houses a horizontally long light emitting substrate 66 in a light emitting unit case 65 (case lid 65 a and case main body 65 b) that can be divided into front and rear parts. A light-emitting portion of a linear light-emitting source that emits light in a linear manner by arranging a plurality of light-emitting elements (point light-emitting elements) 42 such as LEDs (for example, white LEDs) along the longitudinal direction of the light-emitting substrate 66 is formed. ing. The light emitting unit 43 includes a prism array 68 on the light emitting element 42, and a polarizing filter 70 (in the polarizing means and polarizing plate of the present invention) that is long above the light emitting unit case 65 in the direction in which the light emitting elements 42 are arranged side by side. Is attached to the polarizing filter holding frame 71 (corresponding to the polarizing plate holding frame of the present invention).

  As shown in FIG. 8, the light emitting substrate 66 assumes a virtual arc line A in which the optical path lengths to the center of the Fresnel lens 45 are equidistant, and is in a state along a virtual broken line L approximated to the virtual arc line A. It is bent. Therefore, the light emitting elements 42 on the light emitting substrate 66 are arranged on the virtual broken line L, and the optical axis of the light from the light emitting elements 42 is positioned near the center of the Fresnel lens 45. In the present embodiment, the light emitting substrate 66 is provided in a state where three rows of the light emitting elements 42 arranged in a straight line are connected in series by bending into three from the middle.

  In the light emitting substrate 66, a plurality of light emitting elements 42 forming a light emitting portion of the linear light emitting source are arranged in parallel at a predetermined arrangement pitch, and a gap 72 is provided between adjacent light emitting elements 42. By arranging the light emitting elements 42 side by side with the gap 72 provided in this way, it is difficult to transfer heat generated by light emission of one light emitting element 42 to the other light emitting elements 42. In addition, cooling air can flow through the gap 72, and the light emitting element 42 can be efficiently cooled. The cooling mechanism of the light emitting element 42 will be described in detail later.

  Further, the light emitting substrate 66 is arranged so that the light emitting element 42 facing the viewer of the stereoscopic image, that is, the arrangement pitch of the ten central light emitting elements 42a disposed in the central portion of the light emitting substrate 66 is changed. Are arranged so as to be narrower than the arrangement pitch of the light emitting elements 42 facing the left and right sides of the light emitting element 42, that is, the light emitting elements 42 arranged on the left and right outside of the central light emitting element 42a. This is due to the relationship between the position of the light emitting element 42 and the position of the player who views the stereoscopic display. That is, the central light emitting element 42a greatly contributes to the stereoscopic display of the display unit 41 through the vicinity of the player's eyes at the position where the optical axis is stereoscopically visible (in the present embodiment, the front position of the image display device 9). (See FIG. 14). Therefore, the light emitting unit 43 has a dense arrangement of the central light emitting elements 42a to increase the amount of light from the central portion of the light emitting unit 43, so that the light received by the player at the stereoscopically visible position, that is, the stereoscopic of the display unit 41. The image is displayed brightly. The light emitting elements 42 positioned on the left and right outer sides of the central light emitting element 42a have a function of irradiating light on the left and right outer sides with respect to the stereoscopically visible position to widen the viewing angle of the image display device 9.

  The light emitting elements 42 are aligned in a bilaterally symmetrical manner with respect to the center of the polarizing filter 70 and the polarizing filter holding frame 71, which will be described later, and the right half and the left half of the entire light emitting element 42 are arranged. Thus, the light amount and the light intensity are substantially equal.

  The prism array 68 is for narrowing down the light incident from the light emitting element 42 and suitably emitting it to the liquid crystal display panel 56. As shown in FIGS. 7 and 9, the prism array 68 has a flat plate portion 74 disposed substantially in parallel with the light emitting substrate 66 and the light emitting element 42, and the light of a prism 76 described later on the surface of the flat plate portion 74. The emission surface 75 is formed. In addition, the prism array 68 forms a light path by projecting (integrally forming) a plurality of prisms 76 from the back surface of the flat plate portion 74 toward the respective light emitting elements 42 to form an optical path. The light incident surface 77 is in contact with the light emitting element 42 (see FIG. 10). That is, the prism array 68 includes a prism 76 for each light emitting element 42, and the incident surfaces 77 are provided one-to-one with respect to the light emitting elements 42. The prism array 68 is configured by a curved surface in which the side surface of the prism 76 is formed from a Bezier curve. The light incident from the incident surface 77 is totally reflected by the side surface of the prism 76, and the prism is formed from other than the exit surface 75. The light is not transmitted to the outside of the row 68. In this way, the prism array 68 regulates the optical path of the light so as to increase the luminous intensity by restricting the light from spreading in the vicinity of the light emitting element 42 by the side surface portion (that is, the optical path correction unit) of the prism 76. And it can radiate | emit from the output surface 75, without weakening on the way.

The prism array 68 of the present embodiment is divided into three parts, that is, a right prism array 68R, a central prism array 68C, and a left prism array 68L from a portion corresponding to the bent portion of the light emitting substrate 66. Among them, the prisms 76 of the central prism row 68C are formed so that the cross-sectional area of the end of the prism 76 on the exit surface 75 side differs depending on the position of the corresponding light emitting element 42. Specifically, as shown in FIG. 11, when the central ten prisms 76 (central prism 76a) corresponding to the central light emitting element 42a are set as a reference shape, three prisms are provided on the left and right outer sides of the central prism 76a. 76 (first outer prism 76b) has a larger cross-sectional area at the exit surface 75 side end than the central prism 76a. Further, two prisms 76 (second outer prisms 76c) provided on the left and right outer sides of the first outer prism 76b have a larger cross-sectional area at the end on the exit surface 75 side than the first outer prism 76b. That is, the central prism array 68C has a stepwise increase in the cross-sectional area of the end surface of the prism 76 on the exit surface 75 side from the central prism 76a to the second outer prism 76c on the left and right outer sides.
The prisms 76 in the right prism row 68R and the left prism row 68L have the same shape as the second outer prism 76c.

  The prism array 68 configured in this manner can squeeze light from the central portion to increase the light intensity, and gradually loosen the light squeeze toward the left and right outer sides to gradually widen the irradiation range. Therefore, even if the player moves his / her eye position from the wide-angle side of the viewing angle to a position where stereoscopic viewing is possible, the brightness of the display unit 41 is prevented from appearing to change suddenly, thereby realizing an image display without a sense of incongruity. can do.

  The prism array 68 is formed in a state of being symmetrical with respect to the center in the left-right direction of a polarizing filter 70 and a polarizing filter holding frame 71 described later. Therefore, the prism row 68 can emit light generated from the row of symmetrical light emitting elements 42 in a state where the light amount and the light intensity of the right half portion and the left half portion of the prism row 68 are substantially equal. It is configured as follows.

  The polarizing filter 70 is a translucent plate that polarizes the light from the light emitting element 42 in different directions for the left eye and the right eye, and is on the optical path from the light emitting element 42 to the Fresnel lens 45. (Linear light source) 43 is provided on the light emission side. As shown in FIG. 12, the polarizing filter 70 includes a first polarizing filter 81 that forms a left-eye polarizing portion on one side in the longitudinal direction (right side in the drawing) on the surface of a horizontally long and transparent base film 80. On the other side in the direction (left side in the figure), a second polarizing filter 82 forming a right-eye polarizing unit is provided and integrated. Specifically, the polarizing filter 70 is in a state in which the boundary (butting portion) B between the first polarizing filter 81 and the second polarizing filter 82 is located at the approximate center in the left-right direction (longitudinal direction) of the base film 80. Polarizing filters 81 and 82 are pasted through a transparent adhesive or the like. In the polarizing filter 70, the polarization directions of the light transmitted through the first polarizing filter 81 and the second polarizing filter 82 are different from each other. Specifically, the polarizing filter 70 specifies the light emitted from the light emitting element 42, that is, the light whose polarization direction is not specified, by shifting the polarization directions of the first polarizing filter 81 and the second polarizing filter 82 by 90 degrees. It is set so that it is converted into light having a polarization direction of 2 and light having a polarization direction orthogonal to the specific polarization direction and output (transmits).

  The first polarizing filter 81 and the second polarizing filter 82 are films formed by stretching a laminated layer of a polarizing element (for example, iodine or dichroic dye) and a polarizing substrate (for example, polyvinyl alcohol) in the stretching axis direction. It is a material, and light can be polarized in the same polarization direction as the stretching axis direction. As shown in FIG. 12A, the first polarizing filter 81 and the second polarizing filter 82 have a stretching axis direction of +45 degrees and −45 degrees with respect to the longitudinal center of the polarizing filter 70, that is, the boundary B, respectively. It is provided to be a degree. That is, the polarizing filter 70 is set so that the irradiated light is output separately as +45 degree polarized light and −45 degree polarized light, and the polarization directions of these polarized lights are shifted by 90 degrees.

  In addition, the polarizing filter 70 has been subjected to surface processing (for example, embossing processing, anti-glare processing processing) on the surface opposite to the polarizing filters 81 and 82 of the base film 80 (surface on the light emitting element 42 side). A surface processed portion 80a (a kind of light diffusing means) is provided (see FIG. 12C). That is, the base film 80 functions as a light diffusing film, and can individually diffuse the light emitted from each light emitting element 42 by the surface processed portion 80a. The base film 80 can fuse the light diffused from the light emitting elements 42 adjacent to each other to form continuous (or linear) light in the longitudinal direction of the polarizing filter 70.

  As shown in FIGS. 7 and 9, the polarizing filter holding frame 71 that holds the polarizing filter 70 has a mounting surface 85 on which the polarizing filter 70 is mounted (corresponding to the polarizing plate mounting surface of the present invention) in an arc shape. The curvature is the same as that of an arc formed by connecting positions where the optical path lengths are equidistant from the center of the Fresnel lens 45. In addition, the polarizing filter holding frame 71 has a polarizing opening 86 that is long in the direction in which the light emitting elements 42 are arranged on the mounting surface 85, and the emission surface 75 of the prism array 68 faces downward. The polarizing filter holding frame 71 has a plurality of polarizing filter holders 87 (corresponding to the polarizing plate holder of the present invention) above the mounting surface 85 and outside the polarizing openings 86, in the longitudinal direction of the polarizing openings 86. It is provided in a state of being substantially bilaterally symmetric (symmetric with respect to the longitudinal direction of the polarizing filter 70) with respect to the central portion (that is, a polarizing filter support bar 90 described later). The polarizing filter holder 87 is provided at a position to hold the both sides in the longitudinal direction and the central part of the polarizing plate, and forms substantially the same distance as the thickness of the polarizing filter 70 between the mounting surface 85. . Therefore, the polarizing filter holder 87 can prevent deformation such as turning up of the polarizing filter 70 and can maintain polarized light suitable for stereoscopic display.

  In addition, the polarizing filter holding frame 71 includes a polarizing filter support bar 90 (corresponding to the polarizing plate support bar of the present invention) at a substantially central position in the longitudinal direction of the polarizing opening 86 so as to cross the polarizing opening 86 in the width direction. . The polarizing filter support bar 90 is located between the polarizing filter 70 and the prism row 68, and has a lower end edge extending to just before the emission surface 75 of the prism row 68 (see FIG. 10A). That is, the plate-shaped polarizing filter support bar 90 that is long in the front-rear direction is manufactured by setting the vertical width of the flat polarizing filter support bar 90 so that the lower end edge is close to the emission surface 75 of the prism array 68. The polarizing filter support bar 90 is positioned on the symmetrical axis S of the row of the light emitting elements 42 and the prism row 68 in a state where the opening area of the polarizing aperture 86 is substantially equally divided on the left and right.

  The thus configured polarizing filter support bar 90 is arranged at a position where the boundary B overlaps with the polarizing filter support bar 90, so that light emitted from the light emitting element 42 enters the second polarizing filter 82 from the prism array 68. And light incident on the first polarizing filter 81 can be divided (see FIG. 10B). In addition, the polarizing filter support bar 90 prevents the light from the light emitting element 42 located on the left side from traveling to a part of the polarizing opening 86 (right side opening 86R) partitioned on the right side, and the light emitting element located on the right side. 42, the light incident on the second polarizing filter 82 and the light incident on the first polarizing filter 81 are prevented from traveling to a part of the polarizing aperture 86 (left aperture 86 </ b> L) partitioned on the left side. It can be classified by substantially the same amount of light and light intensity. Therefore, the left-eye image and the right-eye image on the display unit 41 can be displayed with substantially the same brightness. Thus, by providing the polarizing filter support bar 90, it is easy to set the amount of light and the ratio of the light intensity of the light transmitted through the second polarizing filter 82 and the light transmitted through the first polarizing filter 81, which is suitable for stereoscopic display. Light conditions can be established.

  Moreover, the polarizing filter support bar 90 prevents the light from hitting the periphery of the boundary B as a boundary light shielding portion by overlapping the boundary B. Therefore, the polarizing filter support bar 90 prevents the light from the light emitting element 42 from being irradiated around the boundary B, and the liquid crystal display panel 56 is polarized in an unstable direction, that is, in any direction. It is possible to prevent unclear light from being irradiated.

  And the polarizing filter support bar 90 is provided in the state arrange | positioned between the optical axes CC of two adjacent center light emitting elements 42a located below (refer Fig.10 (a)). Further, the polarizing filter support bar 90 is formed with a width narrower than the tips of the adjacent central prisms 76a of the central prism row 68C, that is, the interval between the adjacent incident surfaces 77. Therefore, the polarizing filter support bar 90 makes it difficult to prevent light from entering the polarizing filter 70 and suppresses the shadow of the polarizing filter support bar 90 from appearing on the display unit 41 to display a clear stereoscopic image. easy. Although the width of the polarizing filter support bar 90 of this embodiment is about 1 mm, it can be made thinner if the light incident on the first polarizing filter 81 and the light incident on the second polarizing filter 82 can be separated. Good.

  Further, the polarizing filter holding frame 71 projects a polarizing filter stopper 91 (corresponding to the polarizing plate stopper of the present invention) upward from both ends in the longitudinal direction of the mounting surface 85 (left and right direction, that is, the longitudinal direction of the polarizing aperture 86). In addition, the polarizing filter support bar 90 and the boundary B are prevented from being displaced by bringing the end of the polarizing filter 70 into contact with the polarizing filter stopper 91, respectively. The polarizing filter holding frame 71 has a protrusion 92 protruding from the mounting surface 85 in the vicinity of one polarizing filter stopper 91, and a notch 93 formed in the polarizing filter 70 is brought into contact with the protrusion 92. The polarizing filter 70 is attached to the left or right or reverse side to prevent the positions of the first polarizing filter 81 and the second polarizing filter 82 from being reversed.

  The polarizing filter stopper 91 is provided in an obtuse angle with respect to the mounting surface 85. Therefore, even if the polarizing filter 70 expands in the longitudinal direction due to the heat of the light emitting element 42, the end of the polarizing filter 70 can be guided upward to escape. In this way, it is possible to prevent the polarizing filter 70 from being bent or to shift the boundary B and the polarizing filter support bar 90 from each other, and to maintain polarized light suitable for stereoscopic display.

  If the polarizing filter holding frame 71 having such a configuration is provided, and the polarizing filter 70 is slid in a direction to cover the polarizing aperture 86 while the periphery of the polarizing filter 70 is sandwiched between the polarizing filter holder 87 and the mounting surface 85, The polarizing filter holding frame 71 can be equipped with a polarizing filter 70 (see FIG. 13). That is, the light emitting unit 43 can hold the polarizing filter 70. Further, the polarizing filter 70 is detached from the polarizing filter holding frame 71 by bending the end portion of the polarizing filter 70 attached to the polarizing filter holding frame 71 above the polarizing filter stopper 91 and sliding it in the longitudinal direction as it is. be able to. Thus, the polarizing filter holding frame 71 can be provided with the polarizing filter 70 provided with the surface processing portion 80a in a detachable state.

  The first polarizing filter 81 and the second polarizing filter 82 produced by stretching as described above have a property of being curved and deformed along the above-described stretching axis direction or a direction orthogonal to the stretching axis direction. However, the polarizing filter 70 and the polarizing filter holding frame 71 of the present embodiment are configured such that the three-dimensional display on the display unit 41 does not become difficult to observe due to this deformation. That is, since the first polarizing filter 81 and the second polarizing filter 82 are provided so that the extending axis directions are bilaterally symmetric, the polarizing filter 70 can be curved and deformed symmetrically from the boundary B. When the polarizing filter 70 is bent and deformed in a state where the polarizing filter 70 is mounted on the polarizing filter holding frame 71, the polarizing filter 70 receives a symmetrical reaction force from each polarizing filter holder 87 arranged symmetrically. Therefore, since the force received from the polarization filter holder 87 is balanced, the polarization filter 70 is not easily displaced by deformation. Therefore, the boundary B on the polarizing filter 70 is hardly displaced from the polarizing filter support bar 90, and the emission ratio of different polarized light can be maintained, and suitable observation conditions can be maintained without shifting the suitable observation position in the left-right direction. Can be maintained.

  Note that the light emitting unit 43 has a configuration in which cooling air flows. Specifically, the light emitting unit 43 has an intake port 96 on both sides of the case lid 65a located on the front side, and an exhaust port 97 on the left and right central portion of the case body 65b located on the rear side. 96 and the exhaust port 97 communicate with each other through the space inside the light emitting unit case 65. Further, the light emitting unit 43 communicates the intake port 96 with an intake slit 98 provided in the front cover 48 and communicates an exhaust port 97 with an exhaust fan 99 provided outside the rear case 46 via a duct 100. ing. With such a configuration, the light emitting unit 43 can cool the light emitting element 42 by taking in air from the front of the image display device 9, forcing the air around the light emitting element 42 and exhausting the air from the exhaust fan 99. It is like that.

Next, stereoscopic display of the image display device 9 will be described.
In the image display device 9 having the above-described configuration, when light is emitted from the light emitting element 42, the light is transmitted through the polarizing filter 70 and spread radially as shown in FIG. Of the light that spreads radially, the light that has passed through the first polarizing filter (right region) 81 of the polarizing filter 70 (the center of the optical path is indicated by the alternate long and short dash line) is either left or right by the Fresnel lens 45. The traveling direction can be changed by being refracted so as to reach the eye (for example, by being refracted so as to be parallel light). Of the light emitted from the Fresnel lens 45, the light incident on the first region 54a of the fine phase difference plate 54 is transmitted with the polarization axis rotated by 90 degrees. The light emitted from the first region 54a passes through the first polarizing sheet 55, the liquid crystal display panel 56, and the second polarizing sheet 57 substantially vertically (slightly from the right side to the left side) and reaches the left eye. In this manner, among the images displayed on the display element of the liquid crystal display panel 56, the left-eye image displayed at the position corresponding to the first region 54a reaches the left eye.

  Note that the second regions 54b arranged alternately with the first regions 54a of the fine retardation plate 54 do not change the polarization axis of the transmitted light. Therefore, even if the light passes through the first polarizing filter 81 of the polarizing filter 70, the light emitted from the second region 54b is shifted in polarization direction by 90 degrees with respect to the light from the first region 54a. One polarizing sheet 55 is not transmitted. For this reason, the image for the right eye displayed at the position corresponding to the second region 54b among the images displayed on the display element of the liquid crystal display panel 56 does not reach the left eye.

  On the other hand, light that has passed through the second polarizing filter (left region) 82 of the polarizing filter 70 (the center of the optical path is indicated by a broken line) reaches the left or right eye of the observer through the Fresnel lens 45, for example, parallel light. The direction of travel can be changed to Of the light emitted from the Fresnel lens 45, the light incident on the second region 54 b of the fine phase difference plate 54 transmits light having the same polarization direction as that of the second polarizing filter 82 of the polarizing filter 70. The light emitted from the second region 54b passes through the first polarizing sheet 55, the liquid crystal display panel 56, and the second polarizing sheet 57 substantially vertically (slightly left to right) and reaches the right eye. In this way, among the images displayed on the display elements of the liquid crystal display panel 56, the right-eye image displayed at the position corresponding to the second region 54b reaches the right eye.

  In addition, the 1st area | region 54a arrange | positioned alternately with the 2nd area | region 54b of the fine phase difference plate 54 is comprised so that the polarization axis of the transmitted light may be rotated 90 degree | times as above-mentioned. Therefore, even if the light passes through the second polarizing filter 82 of the polarizing filter 70, the light emitted from the first region 54a has a polarization direction shifted by 90 degrees with respect to the light from the second region 54b. One polarizing sheet 55 is not transmitted. As a result, among the images displayed on the display element of the liquid crystal display panel 56, the image for the left eye displayed at the position corresponding to the first region 54a does not reach the right eye.

  In the image display device 9, the right-eye image and the left-eye image of the liquid crystal display panel 56 are shifted left and right to generate binocular parallax, and a stereoscopic image is displayed by adjusting the amount of shift. Can do.

  Specifically, as shown in FIG. 15A, if there is no left-right shift between the right-eye image and the left-eye image, the image display device 9 is an image that does not generate binocular parallax. That is, a two-dimensional planar image is displayed, and this image appears on the display screen.

  As shown in FIG. 15B, if there is a left-right shift x1 between the right-eye image and the left-eye image, the image display device 9 can generate an image that generates binocular parallax, that is, a three-dimensional stereoscopic image. Is displayed. Further, in a state where the right-eye image is located on the side opposite to the right eye (left side in the figure) and the left-eye image is located on the opposite side (right side in the figure), the image display device 9 It is possible to display an image with a three-dimensional effect such that the image appears at a position closer to the front side by y1 than the display screen.

  Then, as shown in FIG. 15C, there is a left-right shift x2 between the right-eye image and the left-eye image, and the right-eye image is located on the right side and the left-eye image is located on the left side. For example, the image display device 9 displays an image that generates binocular parallax, that is, a three-dimensional stereoscopic image, and this image appears at a position on the back side by y2 with respect to the display screen, and has a stereoscopic effect that pulls down. An image can be displayed.

  Further, the image display device 9 includes light incident on the first polarization filter 81 and light incident on the second polarization filter 82 by the polarization filter support bar 90 of the polarization filter holding frame 71 from the light emitting elements 42. It is possible to prevent the crosstalk between the left-eye image and the right-eye image on the display unit 41. Further, since the left-eye image and the right-eye image are displayed with substantially the same brightness, it is possible to eliminate unevenness in the brightness of the light transmitted through the display unit 41. Therefore, the stereoscopic image on the image display device 9 can be viewed in a clear state.

  In the above embodiment, the linear light emitting source that generates linear light by arranging the point light emitting elements 42 in a polygonal line as the light emitting source is applied, but the present invention is not limited thereto. The linear light emitting source may be formed by a single light emitting element such as a cold cathode fluorescent lamp (CCFL).

  In the above-described embodiment, the light emitting unit 43 is provided in a state where the light emitting elements 42 are arranged on the virtual broken line L, but the present invention is not limited to this. For example, in the light emitting unit, the light emitting elements may be arranged on a virtual arc line in which the optical path lengths to the center of the Fresnel lens are substantially equidistant. That is, the light emitting substrate may be curved in a state along a virtual arc line in which the optical path lengths to the center of the Fresnel lens are equidistant (none is shown). As described above, by configuring the light emitting unit in a state where the light emitting elements are arranged on the virtual arc line, the light of the light emitting elements can be irradiated onto the display unit 41 more efficiently.

  In the image display device to which the present invention is not applied, the light from the light emitting element for the right eye presents an image for the left eye, or the light from the light emitting element for the left eye presents an image for the right eye. In other words, so-called crosstalk occurs in which an image presented to one observation eye leaks to the other observation eye. If such an image display device is provided in a gaming machine, there is a possibility that the interest of the game is impaired. By providing the image display device to which the present invention is applied, so-called crosstalk of stereoscopic image display can be suppressed, so that a gaming machine that does not impair the fun of gaming can be provided.

That is, in a gaming machine equipped with an image display device that displays a stereoscopically visible image by the parallax effect of the left and right eyes on a gaming board in which a gaming area is formed,
The image display device includes:
A liquid crystal display panel capable of transmitting the light irradiated from the rear;
A light source that irradiates the liquid crystal panel with light having a specific polarization direction and light having a polarization direction orthogonal to the specific polarization direction;
A first region disposed between the liquid crystal display panel and the light source and transmitting light of the specific polarization direction; and a second region transmitting light of a polarization direction orthogonal to the specific polarization direction. A filter provided repeatedly in the vertical direction,
The light source includes a long light emitting source that emits light from which a polarization direction is not specified from a light emitting element, light that is not specified by the polarization direction, and light that is orthogonal to the specific polarization direction. A polarizing means for converting and outputting light in a direction, and an optical means for refracting light in different polarization directions in directions to reach the left and right eyes and irradiating the liquid crystal display panel,
The polarizing means is a translucent plate that is long in the same direction as the light emitting source, and is a first polarizing filter for the left eye located on one side in the longitudinal direction and for the right eye located on the other side in the longitudinal direction. A polarizing plate having a polarization direction different from that of the second polarizing filter,
The light-emitting source includes a polarizing plate holding frame that holds the polarizing plate and holds the polarizing plate,
The polarizing plate holding frame is
A polarizing aperture that is blocked by the mounted polarizing plate, and a polarizing plate support bar installed across the polarizing aperture in a state of crossing the polarizing aperture in the width direction,
Light that is emitted from the light emitting element by the polarizing plate support bar is disposed at a position where the boundary between the first polarizing filter and the second polarizing filter overlaps the polarizing plate support bar and the polarizing plate is mounted on the polarizing plate holding frame. Can be divided into light incident on the first polarizing filter and light incident on the second polarizing filter, thereby making it difficult to impair the fun of the game.

  Moreover, although the above-described embodiment has been described by taking a pachinko gaming machine as a typical gaming machine as an example, the present invention is not limited thereto, and if an image display device capable of displaying a stereoscopic image is provided, for example, It may be a gaming machine such as a sealed ball type pachinko machine, an arrangement ball type game machine, or a sparrow ball type game machine that circulates a game ball sealed inside.

  It should be understood that the above-described embodiment is illustrative in all respects and not restrictive. The present invention is not limited to the above description, but is defined by the scope of the claims, and includes all modifications within the scope and meaning equivalent to the scope of the claims.

It is a front view of the game board of a pachinko gaming machine. It is a front view of a center case. It is a perspective view of an image display unit. It is a perspective view of an image display device. It is a disassembled perspective view of an image display apparatus. It is a block diagram of the optical system of an image display apparatus. It is the disassembled perspective view seen from the back of the light emission unit. FIG. 4 is a relationship diagram between the center of a Fresnel lens and a light emitting substrate. It is a back surface sectional view of a light emitting unit. (A) is a rear cross-sectional enlarged view of a light emitting unit, (b) is a back cross-sectional enlarged view of the periphery of a polarizing filter support bar. It is a bottom view of a center prism. (A) is a top view of a polarizing filter, (b) is an enlarged view of the boundary between a 1st polarizing filter and a right side polarizing part, (c) is the schematic of the spreading | diffusion of the light by a base film. It is explanatory drawing in the middle of attaching the polarizing filter to the polarizing filter holding frame. It is a top view of the optical system of an image display apparatus. It is explanatory drawing of the appearance position of the stereo image in an image display apparatus, (a) is explanatory drawing of the appearance position on a display surface, (b) is explanatory drawing of the appearance position ahead of a display surface, (c) is a display. It is explanatory drawing of the appearance position behind a surface.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Game board 2 Game board main body 4 Cell sheet 5 Guide rail 6 Game area | region division member 7 Game area 8 Center case 9 Image display apparatus 10 Starting prize device 11 Special variation prize apparatus 12 General prize tool 13 Windmill 14 Lamp / LED
15 Out port 18 Opening window part 19 Mounting substrate 20 Armor part 21 Side part 22 Decoration part 23 Bottom part 25 Game ball guide path 26 Stage 27 Sub stage 28 Flow guide member 30 Game ball flow path 31 Flow path cover member 32 Gap part 33 Bottom 36 Image display device case 37 Image display unit 39 Light source 40 Housing 40a Wall 41 Display unit 42 Light emitting element 42a Central light emitting element 43 Light emitting unit 44 Reflector 46 Rear case 45 Fresnel lens 47 Front frame 48 Front cover 49 Opening 50 Diffuser 51 Display Unit Holding Frame 54 Fine Retardation Plate 54a First Area 54b Second Area 55 First Polarizing Sheet 56 Liquid Crystal Display Panel 57 Second Polarizing Sheet 60 Fresnel Lens 61 Lens Holder 63 Confirmation Window 65 Light-Emitting Unit Case 65a Case Cover 65b Case body 66 Substrate 68 Prism 68R Right side prism 68C Central prism 68L Left side prism 70 Polarizing filter 71 Polarizing filter holding frame 74 Flat plate 75 Emission surface 76 Prism 76a Central prism 76b First outer prism 76c Second outer prism 77 Incident surface 80 Base film 80a Uneven surface 81 First polarization filter 82 Second polarization filter 85 Mounting surface 86 Polarization aperture 87 Polarization filter holder 90 Polarization filter support bar 91 Polarization filter stopper 92 Protrusion 93 Notch 96 Intake port 97 Exhaust port 98 Inlet slit 99 Exhaust fan 100 Duct

Claims (5)

A liquid crystal display panel capable of transmitting the light irradiated from the rear;
A light source that irradiates the liquid crystal display panel with light having a specific polarization direction and light having a polarization direction orthogonal to the specific polarization direction;
A first region disposed between the liquid crystal display panel and the light source and transmitting light of the specific polarization direction; and a second region transmitting light of a polarization direction orthogonal to the specific polarization direction. A filter provided repeatedly in the vertical direction,
The light source includes a long light emitting source that emits light from which a polarization direction is not specified from a light emitting element, light that is not specified by the polarization direction, and light that is orthogonal to the specific polarization direction. An image comprising: polarization means for converting light into a direction of light and outputting; and optical means for refracting light of different polarization directions in directions to reach the left and right eyes and irradiating the liquid crystal display panel. In the display device,
The polarizing means is a translucent plate that is long in the same direction as the light-emitting source, and is a first polarizing filter for the left eye located on one side in the longitudinal direction and a right-eye plate located on the other side in the longitudinal direction. It consists of polarizing plates with different polarization directions from each other with the second polarizing filter,
The light-emitting source includes a polarizing plate holding frame that holds the polarizing plate and holds the polarizing plate,
The polarizing plate holding frame is
A polarizing aperture that is blocked by the mounted polarizing plate, and a polarizing plate support bar installed across the polarizing aperture in a state of crossing the polarizing aperture in the width direction,
Light that is emitted from the light emitting element by the polarizing plate support bar is disposed at a position where the boundary between the first polarizing filter and the second polarizing filter overlaps the polarizing plate support bar and the polarizing plate is mounted on the polarizing plate holding frame. Is divided into light incident on the first polarizing filter and light incident on the second polarizing filter. The light-emitting source is a linear light-emitting source that is composed of a plurality of point-like light-emitting elements arranged linearly and emits light linearly,
The image display device according to claim 1, wherein the polarizing plate support bar is provided between the optical axes of the adjacent point light emitting elements among the point light emitting elements.   The image display apparatus according to claim 1, wherein the polarizing plate holding frame includes a plurality of polarizing plate presses that hold the polarizing plate around a polarizing aperture. The first polarizing filter and the second polarizing filter are formed by stretching in a state where a polarizing element and a polarizing substrate are laminated,
The polarizing plate includes the first polarizing filter and the second polarizing filter in a state in which the respective stretching axis directions are substantially symmetrical with respect to the longitudinal direction of the polarizing plate with respect to the boundary between the first polarizing filter and the second polarizing filter. Provided,
The polarizing plate holding frame is in a state of being substantially symmetrical in the longitudinal direction of the polarizing plate with respect to the polarizing plate support bar at a position where the polarizing plate supporting press is pressed at least on both sides and the center in the longitudinal direction of the polarizing plate. The image display device according to claim 3, wherein the image display device is arranged. The polarizing plate holding frame includes a polarizing plate stopper protruding upward from both ends in the longitudinal direction of the polarizing aperture,
The polarizing plate stopper is in contact with both ends in the longitudinal direction of the polarizing plate in an obtuse angle with respect to the polarizing plate mounting surface of the polarizing plate holding frame. The image display device described.

Images