JP2009230084A - Stereoscopic displaying apparatus - Google Patents

Abstract

Crosstalk is reduced in a stereoscopic display device.
In a stereoscopic display device having an image generation unit, a polarizing plate, and a polarization axis control plate, the polarization axis control plate is disposed adjacent to the right eye polarization region and the right eye polarization region where the image light for the right eye is incident, Left eye polarization region where left eye image light is incident, a boundary between the right eye polarization region and the left eye polarization region, which is provided on a surface facing the polarizing plate, and blocks a plurality of right eye image light and left eye image light. A light shielding part and a plurality of openings that are formed between the light shielding part and the plurality of light shielding parts and transmit the image light for the right eye and the image light for the left eye, and are emitted from one of the right eye image area and the left eye image area The image light incident on one of the plurality of openings is directed toward the inside of the viewing angle, and is emitted from the other adjacent to one of the right-eye image region and the left-eye image region, and enters one opening. Incident image light is outside the viewing angle Buy.
[Selection] Figure 1

Description

  The present invention relates to a stereoscopic display device. In particular, the present invention relates to a stereoscopic display device that reduces crosstalk between left and right image light.

For example, Patent Document 1 describes a stereoscopic display device that allows an observer to stereoscopically view by generating a right-eye image and a left-eye image using right-eye and left-eye parallax. This stereoscopic display device is arranged on the liquid crystal display panel that generates the right-eye image and the left-eye image, and on the viewer side of the liquid display panel, and proceeds with each other so as to face the region that generates the right-eye image and the left-eye image. And a quarter-wave plate whose phase axis is shifted by 90 degrees.
Japanese Patent Laid-Open No. 10-253824

  In the stereoscopic display device, when observed from the position of a certain viewing angle from the vertical center of the stereoscopic display device, a part of the image for the right eye generated by the liquid crystal display panel is transmitted through the quarter-wave plate for the left eye. Crosstalk that reaches the left eye of the observer.

  In order to solve the above-described problem, in the first embodiment of the present invention, a stereoscopic display device, a right-eye image generation region that generates image light for the right eye and a left-eye image generation region that generates image light for the left eye A right-eye image light and a left-eye image light generated by the image generation unit, and a right-eye image light and a left-eye image light from the polarizing plate. A polarization axis control plate that emits as linearly polarized light whose polarization axes of right-eye image light and left-eye image light are orthogonal to each other, or circularly polarized light whose rotation directions of the polarization axes are opposite to each other. The polarization axis control plate is disposed adjacent to the right-eye polarization region where the right-eye image light is incident and the right-eye polarization region, and the left-eye polarization region where the left-eye image light is incident, and the right-eye polarization region and the left-eye polarization region. Set on the boundary and facing the polarizing plate A plurality of light-shielding portions that block the image light for the right eye and the image light for the left eye, and a plurality of openings that are formed between the plurality of light-shielding portions and transmit the image light for the right eye and the image light for the left eye Image light emitted from one of the right eye image generation region and the left eye image generation region and incident on one of the plurality of openings is directed to the inside of the viewing angle, and the right eye image generation region The image light emitted from the other adjacent to one of the left-eye image generation regions and incident on one opening is directed to the outside of the viewing angle.

  It should be noted that the above summary of the invention does not enumerate all the necessary features of the present invention. In addition, a sub-combination of these feature groups can also be an invention.

  Hereinafter, the present invention will be described through embodiments of the invention, but the following embodiments do not limit the invention according to the claims. In addition, not all the combinations of features described in the embodiments are essential for the solving means of the invention.

  FIG. 1 is an exploded perspective view of a stereoscopic display device 100 that is a part of the stereoscopic image display system 10 of the present embodiment. The stereoscopic image display system of this embodiment includes a stereoscopic display device 100 and polarized glasses. As shown in FIG. 1, the stereoscopic display device 100 includes a light source 120, a polarizing plate 150, an image generation unit 160, a polarizing plate 170, and a polarization axis control plate 180 in this order. Contained. When an observer observes a stereoscopic image displayed on the stereoscopic display device 100, the observer observes from the right side of the polarization axis control plate 180 in FIG.

  The light source 120 is arranged on the farthest side of the stereoscopic display device 100 as viewed from the observer, and uses the stereoscopic display device 100 as a part of the stereoscopic image display system (hereinafter referred to as “usage state of the stereoscopic display device 100”). In FIG. 5, white non-polarized light is emitted toward one surface of the polarizing plate 150. In the present embodiment, a surface light source is used as the light source 120, but a combination of a point light source and a condenser lens may be used instead of the surface light source. An example of this condensing lens is a Fresnel lens sheet.

  The polarizing plate 150 is disposed on the light source 120 side in the image generation unit 160. The polarizing plate 150 has a transmission axis and an absorption axis perpendicular to the transmission axis. When non-polarized light emitted from the light source 120 is incident, the polarizing plate 150 transmits light having a polarization axis parallel to the transmission axis direction of the non-polarized light, Blocks light with a polarization axis parallel to the absorption axis direction. Here, the direction of the polarization axis is the vibration direction of the electric field in the light, and the direction of the transmission axis in the polarizing plate 150 is the observer viewing the stereoscopic display device 100 as indicated by an arrow in FIG. The direction is 45 degrees from the horizontal direction to 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 stereoscopic 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”). Note that the right-eye image light transmitted through the right-eye image generation region 162 and the left-eye image light transmitted through the left-eye image generation region 164 are each linearly polarized light having a polarization axis in a specific direction. Here, the polarization axes in specific directions may be the same as each other. In the example shown in FIG. 1, the polarization axes are both the same as the direction of the transmission axis in the polarizing plate 170 described later. 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. By electrically driving each cell in this LCD, each cell transmits a light passing therethrough without changing the direction of its polarization axis, and a state in which the direction of the polarization axis is rotated by 90 degrees and transmitted. Switch. The right eye image generation region 162 and the left eye image generation region 164 may be alternately arranged for each cell in the vertical direction, or may be alternately arranged for each predetermined number of cells.

  The polarizing plate 170 is disposed on the viewer side in the image generation unit 160. When the polarizing plate 170 receives 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, the polarization axis is parallel to the transmission axis. Transmits light and blocks light whose polarization axis is parallel to the absorption axis. Here, the direction of the transmission axis in the polarizing plate 170 is 45 degrees from the horizontal direction when the observer looks at the stereoscopic display device 100 as indicated by an arrow in FIG.

  The polarization axis control plate 180 has a right eye polarization region 181 and a left eye polarization region 182. The positions and sizes of the right-eye polarizing region 181 and the left-eye polarizing region 182 on the polarization axis control plate 180 are as follows when the stereoscopic display device 100 is observed from a predetermined observation distance at the center position on the front surface. The right-eye image light transmitted through the right-eye image generation region 162 is incident, and the left-eye image light transmitted through the left-eye image generation region 164 is incident on the left-eye polarization region 182. The position and size of the right eye polarizing region 181 and the left eye polarizing region 182 will be further described with reference to FIG.

  The right-eye polarization region 181 transmits the incident right-eye image light as it is without rotating the polarization axis thereof. The left-eye polarization region 182 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 right-eye polarization region 181. Therefore, the polarization axes of the right-eye image light transmitted through the right-eye polarization region 181 and the polarization axes of the left-eye image light transmitted through the left-eye polarization region 182 are orthogonal to each other as indicated by arrows in FIG. . In addition, the arrow in the polarization axis control plate 180 in FIG. 1 indicates the polarization axis of the polarized light that has passed through the polarization axis control plate 180. For example, transparent glass or resin is used for the right-eye polarizing region 181, and the left-eye polarizing region 182 has an optical axis having an angle of 45 degrees with respect to the direction of the polarization axis of the incident left-eye image light, for example. A half wave plate is used. In the example shown in FIG. 1, the direction of the optical axis of the left-eye polarizing region 182 is the horizontal direction or the vertical direction. Here, the optical axis refers to either the fast axis or the slow axis when light passes through the left-eye polarizing region 182.

  Further, the stereoscopic display device 100 includes the right-eye polarization region 181 and the left-eye polarization region 182 of the polarization axis control plate 180 on the viewer side (right side of the polarization axis control plate 180 in FIG. 1) from the polarization axis control plate 180. There may be provided a diffusion plate that diffuses the transmitted right-eye image light and left-eye image light in at least one of the horizontal direction and the vertical direction. For such a diffuser plate, for example, a lenticular lens sheet in which a plurality of cylindrically shaped convex lenses (cylindrical lenses) extending in the horizontal direction or the vertical direction is used, or a lens array sheet in which a plurality of convex lenses are arranged in a planar shape is used. It is done.

  FIG. 2 is a schematic top view showing a usage state of the stereoscopic image display system 10. When a stereoscopic image is observed by the stereoscopic image display system 10, the observer 500 puts the right-eye image light and the left-eye image light projected from the stereoscopic display device 100 on polarized glasses 200 as shown in FIG. 2. Observe. The polarizing glasses 200 are provided with a right-eye image transmission unit 232 at a position corresponding to the right eye 512 side of the observer 500 when the observer 500 wears the polarizing glasses 200, and a left-eye image transmission at a position corresponding to the left eye 514 side. A part 234 is arranged.

  The right-eye image transmission unit 232 is a polarizing plate whose transmission axis direction is the same as that of the right-eye image light transmitted through the right-eye polarizing region 181 and whose absorption axis direction is perpendicular to the transmission axis direction. The left-eye image transmission unit 234 is a polarizing plate whose transmission axis direction is the same as that of the left-eye image light transmitted through the left-eye polarization region 182 and whose absorption axis direction is perpendicular to the transmission axis direction. For the right-eye image transmission part 232 and the left-eye image transmission part 234, for example, a polarizing lens to which a polarizing film obtained by uniaxially stretching a film impregnated with a dichroic dye is attached is used.

  When the observer 500 observes a stereoscopic image with the stereoscopic image display system 10, the right-eye image light and the left-eye image light transmitted through the right-eye polarizing region 181 and the left-eye polarizing region 182 of the polarization axis control plate 180 are emitted. Within the range, by observing the stereoscopic display device 100 with the polarizing glasses 200 as described above, the right eye 512 can observe only the right eye image light, and the left eye 514 can observe only the left eye image light. can do. Therefore, the observer 500 can recognize these right-eye image light and left-eye image light as a stereoscopic image.

  FIG. 3 is a side view illustrating details of the image generation unit 160, the polarizing plate 170, and the polarization axis control plate 180 in the stereoscopic display device 100. Here, the thickness of each member is exaggerated for explanation. For the sake of simplicity, the lower half is omitted.

  As shown in FIG. 3, the image generation unit 160 distributes light of a specific wavelength arranged corresponding to the right eye image generation region 162 and the left eye image generation region 164, and the right eye image generation region 162 and the left eye image generation region 164. A transparent color filter 166 and a glass substrate 168 that supports the right eye image generation region 162, the left eye image generation region 164, and the color filter 166 are included. In the glass substrate 168, the polarizing plate 170 is supported on the viewer 500 side opposite to the side where the color filter 166 is disposed. Note that the surface of the polarizing plate 170 facing the polarization axis control plate 180 is preferably smooth.

  Furthermore, the polarization axis control plate 180 includes a light shielding unit 190, a right-eye polarizing region 181, a left-eye polarizing region 182, an alignment unit 192, and a glass substrate 194 from the side facing the polarizing plate 170 toward the viewer 500 side. Here, an example of the right-eye polarizing region 181 and the left-eye polarizing region 182 is a liquid crystal, and has the function of the half-wave plate by being aligned according to the alignment direction of the alignment portion 192.

The right-eye polarization region 181 and the left-eye polarization region 182 observe the right-eye image light and the left-eye image light emitted from the right-eye image generation region 162 and the left-eye image generation region 164 of the image generation unit 160 from the position of the specific observer 500. In this case, it is arranged at a position where no crosstalk occurs. The specific position is, for example, the center in the vertical direction of the stereoscopic display device 100 and is a position away from the stereoscopic display device 100 by a predetermined observation distance. Therefore, as shown in FIG. 3, the right-eye polarization region 181 and the left-eye polarization region 182 have a right-eye image generation region 162 and a left-eye image generation region 164 as they go to the end in the vertical direction, that is, as the elevation angle α from the observation position increases. It is arranged at a position shifted in the vertical direction with respect to the position opposite to. The elevation angle α is tan ⁻¹ (h / L) using the observation distance L and the distance h from the center of the stereoscopic display device 100 to the right eye image generation area 162 and the left eye image generation area 164. expressed.

  Consider the case where the stereoscopic display device 100 observes from the position of an observer 502 at a certain viewing angle (θ + α) from the position of the observer 500, as indicated by the dotted line in FIG. In this case, as shown by the alternate long and short dash line in the figure, a part of the left-eye image light from the left-eye image generation region 164 passes through the right-eye polarization region 181 of the polarization axis control plate 180 and reaches the observer 502. Talk occurs. Therefore, in the present embodiment, the polarization axis control plate 180 is provided on a surface facing the polarizing plate 170, and includes a light shielding unit 190 that blocks the right eye image light and the left eye image light.

  FIG. 4 is a partially enlarged view of FIG. As shown in FIG. 4, in the polarization axis control plate 180, a plurality of light shielding portions 190 extending in the horizontal direction are arranged on the surface facing the polarizing plate 170. In FIG. 4, the right eye image generation area 361 and the left eye image generation area 362 are an arbitrary adjacent set of the right eye image generation area 162 and the left eye image generation area 164 for explanation. The right-eye polarization region 381 and the left-eye polarization region 382 also show a set corresponding to the right-eye image generation region 361 and the left-eye image generation region 362 out of the right-eye polarization region 181 and the left-eye polarization region 182. Similarly, the light shielding unit 390 also shows the one corresponding to the boundary between the right eye image generation region 361 and the left eye image generation region 362 among the plurality of light shielding units 190.

  As shown in FIG. 4, a light shielding part 390 having a width w in the vertical direction is disposed between the right eye polarizing region 381 and the left eye polarizing region 382. On both sides of the light shielding portion 390, an opening 391 and an opening 392 that transmit image light of the right-eye polarizing region 381 and the left-eye polarizing region 382 are provided. Here, the width w of the light shielding unit 390 is such that image light directed from the boundary between the right eye image generation region 361 and the left eye image generation region 362 to the inside (± θ) of the viewing angle with respect to the elevation angle α of the observer 500 is shielded. To be set. Therefore, the width w of the light shielding portion 390 preferably satisfies the following mathematical formula (1) geometrically, where d is the distance from the color filter 166 to the right-eye polarizing region 181.

  w = d * (tan (α + θ) −tan (α−θ)) (1)

  However, since image light has a diffraction phenomenon or the like, the width w of the light-shielding portion 390 may be larger than the above formula (1) or smaller than the above formula (1) in order to increase the aperture ratio. Good.

  Accordingly, the image light emitted from the left eye image generation region 362 and incident on the opening 392 is directed to the inside (± θ) of the viewing angle, and is emitted from the right eye image generation region 361 adjacent to the left eye image generation region 362 to be opened. The image light incident on the part 392 goes outside the viewing angle. Therefore, when the stereoscopic display device 100 is observed from the inside of the viewing angle (± θ), the right-eye image (left-eye image) enters the left-eye polarization region (right-eye polarization region) and is observed by the left eye (right eye). Crosstalk due to can be reduced.

  The light shielding portion 190 is formed by screen printing, for example. In addition, it is preferable to form this light-shielding part 190 with what disperse | distributed the filler component to binder resin etc., for example. As the filler component, metal particles and oxides thereof, or pigments and dyes are used. The color tone of the filler component is preferably black with respect to the right-eye image light and the left-eye image light emitted from the image generation unit 160. The binder resin for dispersing or dissolving the pigment and dye may be a known resin such as acrylic resin, urethane resin, polyester, novolac resin, polyimide, epoxy resin, vinyl chloride / vinyl acetate copolymer, nitrocellulose, or a combination thereof. Use.

  Note that the color filter 166 may be provided with a light blocking unit that blocks image light at a position corresponding to the boundary between the right eye image generation region 162 and the left eye image generation region 164. In this case, it is preferable that the image generation unit 160, the polarizing plate 170, and the polarization axis control plate 180 have values shown in Table 1 below.

  As Example 1, the image generation unit 160, the polarizing plate 170, and the polarization axis control plate 180 are defined by the following mathematical formulas (2) to (4) using the stereoscopic display device 100 having the values shown in Table 2 below. The crosstalk rate C (θ) was measured. Further, as Comparative Example 1, the crosstalk rate C (θ) was measured in the same manner using the stereoscopic display device 100 under the same conditions as in Example 1 except that the polarization axis control plate 180 did not have the light shielding portion 190. .

C (θ) = (C _L (θ) + C _R (θ)) / 2 (2)
C _L (θ) = (R _wL −B _L ) / (L _wL −B _L ) × 100% (3)
C _R (θ) = (L _wR −B _R ) / (R _wR −B _R ) × 100% (4)

Here, _BL is the luminance obtained by observing the image light for the left eye when the image light for the right eye and the image light for the left eye are made black at the viewing angle θ through the image transmission unit for the left eye 234. _LwL is a _{luminance obtained by observing} the image light when the right eye image light is black and the left eye image light is white through the left eye image transmission unit 234 at the viewing angle θ. is there. Further, R _wL is the _{luminance obtained by observing} the image light when the right eye image light is white and the left eye image light is black through the left eye image transmission unit 234 at the viewing angle θ. is there. Similarly, B _R is the image light in the case of the black image light for image light and the left eye for the right eye, the luminance observed at the viewing angle θ through the right eye image transmission section 232. Further, L _wR is a luminance obtained by observing the image light when the right eye image light is black and the left eye image light is white through the right eye image transmission unit 232 at a viewing angle θ. is there. Further, R _wR is a luminance obtained by observing the image light when the right eye image light is white and the left eye image light is black through the right eye image transmission unit 232 at the viewing angle θ. is there.

  FIG. 5 shows the measurement result of the crosstalk rate C (θ). As shown in FIG. 5, in Example 1 and Comparative Example 1, the crosstalk rate C (θ) increases as the viewing angle θ increases. Here, the crosstalk rate C (θ) of Example 1 is lower than the crosstalk rate C (θ) of Comparative Example 1 for the same viewing angle θ. The best crosstalk rate of Example 1 is 1.5%, and the best crosstalk rate of Comparative Example 1 is 4%. Further, the crosstalk ratio C (θ) is 7% or less in the range where the viewing angle θ is ± 13.5 °. Thus, it can be seen that the crosstalk is reduced by providing the light shielding portion 190.

  FIG. 6 is an exploded perspective view of another stereoscopic display device 101. In the stereoscopic display device 101 shown in FIG. 6, the same components as those of the stereoscopic display device 100 of FIG. As shown in FIG. 6, the stereoscopic display device 101 includes a polarization axis control plate 185 instead of the polarization axis control plate 180 of the stereoscopic display device 100. The polarization axis control plate 185 has a right eye polarization region 186 and a left eye polarization region 187. Here, both the right-eye polarizing region 186 and the left-eye polarizing region 187 are quarter-wave plates, and their optical axes are orthogonal to each other. The right-eye polarization region 186 and the left-eye polarization region 187 in the polarization axis control plate 185 are formed at the positions and sizes described with reference to FIG. 3 in the same manner as the right-eye polarization region 181 and the left-eye polarization region 182 in the polarization axis control plate 180. The Accordingly, in the usage state of the stereoscopic display device 101, the right-eye image light transmitted through the right-eye image generation region 162 is incident on the right-eye polarization region 186, and the left-eye image generation region 164 is transmitted through the left-eye polarization region 187. The left-eye image light enters.

  The polarization axis control plate 185 shown in FIG. 6 emits the incident light as circularly polarized light whose polarization axes rotate in opposite directions. For example, the right-eye polarizing region 186 emits incident light as clockwise circularly polarized light, and the left-eye polarizing region 187 emits incident light as counterclockwise circularly polarized light. Here, the arrow on the polarization axis control plate 185 in FIG. 6 indicates the rotation direction of the polarized light that has passed through the polarization axis control plate 185. For the right-eye polarizing region 186, for example, a quarter-wave plate whose optical axis is in the horizontal direction is used, and for the left-eye polarizing region 187, for example, a quarter-wave plate whose optical axis is in the vertical direction is used.

  When observing the stereoscopic display device 101 including the polarization axis control plate 185 shown in FIG. 6, the observer 500 changes to the right-eye image transmission unit 232 and the left-eye image transmission unit 234 of the polarizing glasses 200 shown in FIG. A quarter-wave plate whose optical axes are orthogonal to each other is arranged. For example, a quarter-wave plate whose optical axis formed of polycarbonate is horizontal is used for the right-eye retardation plate, and an optical axis formed of polycarbonate is vertical for the left-eye retardation plate. A quarter wave plate that is the direction is used. Furthermore, the polarizing glasses are polarized light whose transmission axis direction is 45 degrees to the right when viewed from the observer 500 and whose absorption axis direction is perpendicular to the transmission axis direction, closer to the observer side than the phase difference plate. With a plate. The observer 500 can observe only the right eye image light with the right eye 512 and only the left eye image light with the left eye 514 by observing the stereoscopic display device 101 with the polarizing glasses. .

  Also in the stereoscopic display device 101 illustrated in FIG. 6, by providing the light shielding unit 190 illustrated in FIG. 4, the right-eye image can be prevented from entering the left-eye polarization region, and crosstalk can be reduced.

  As is clear from the above description, according to the present embodiment, the crosstalk between the image for the right eye and the image for the left eye within the viewing angle is reduced by the light shielding portion and the opening provided in the polarization axis control plate. A stereoscopic display device can be realized.

  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.

1 is an exploded perspective view of a stereoscopic display device 100 that is a part of a stereoscopic image display system 10 of the present embodiment. 3 is a schematic top view showing a usage state of the stereoscopic image display system 10. FIG. 4 is a side view illustrating details of an image generation unit 160, a polarizing plate 170, and a polarization axis control plate 180 in the stereoscopic display device 100. FIG. FIG. 4 is a partial enlarged view of FIG. 3 for explaining a light shielding unit 190. The measurement result of the crosstalk rate C (θ) is shown. 3 is an exploded perspective view of a stereoscopic display device 101. FIG.

Explanation of symbols

  10 stereoscopic image display system, 100 stereoscopic display device, 101 stereoscopic display device, 120 light source, 150 polarizing plate, 160 image generating unit, 162 right eye image generating region, 164 left eye image generating region, 166 color filter, 168 glass substrate, 170 polarized light Plate, 180 polarization axis control plate, 181 right eye polarization region, 182 left eye polarization region, 185 polarization axis control plate, 186 right eye polarization region, 187 left eye polarization region, 190 light-shielding portion, 192 orientation portion, 194 glass substrate, 200 polarization glasses, 232 Right-eye image transmission part, 234 Left-eye image transmission part, 361 Right-eye image generation area, 362 Left-eye image generation area, 381 Right-eye polarization area, 382 Left-eye polarization area, 390 Shading part, 391 opening part, 392 opening part, 500 observation 502 observer, 512 right eye, 514 left eye

Claims (3)

A stereoscopic display device,
An image generation unit having a right eye image generation region for generating image light for the right eye and a left eye image generation region for generating image light for the left eye;
A polarizing plate that emits the image light for the right eye and the image light for the left eye generated by the image generation unit in the same polarization direction;
The right-eye image light and the left-eye image light are incident from the polarizing plate, and the polarization axes of the right-eye image light and the left-eye image light are orthogonal to each other, or the polarization axis A polarization axis control plate that emits as circularly polarized light whose rotational directions are opposite to each other,
The polarization axis control plate is
A right-eye polarization region on which the image light for the right eye is incident;
A left-eye polarization region that is arranged adjacent to the right-eye polarization region and on which the image light for the left eye is incident;
A plurality of light shielding portions provided on a surface facing the polarizing plate at a boundary between the right eye polarizing region and the left eye polarizing region, and blocking the image light for the right eye and the image light for the left eye; and
A plurality of openings that are formed between the plurality of light-shielding portions and transmit the image light for the right eye and the image light for the left eye;
Image light emitted from one of the right eye image generation region and the left eye image generation region and incident on one of the plurality of openings is directed to the inside of a viewing angle, and the right eye image generation region And a three-dimensional display device in which image light emitted from the other of the left-eye image generation regions and adjacent to the one of the left-eye image generation regions is incident on the one opening portion and travels outside the viewing angle.   The stereoscopic display device according to claim 1, wherein a surface of the polarizing plate facing the polarization axis control plate is smooth. The stereoscopic display device according to claim 1, wherein the crosstalk rate C (θ) defined by the following mathematical formulas (5) to (7) is 7% or less in a range of the viewing angle θ of ± 13.5 °.
C (θ) = (C _L (θ) + C _R (θ)) / 2 (5)
C _L (θ) = (R _wL −B _L ) / (L _wL −B _L ) × 100% (6)
C _R (θ) = (L _wR −B _R ) / (R _wR −B _R ) × 100% (7)
Here, _BL is the image light for the left eye when the image light for the right eye and the image light for the left eye are made black, through the image transmission unit for the left eye that transmits the image light emitted from the left eye polarization region. _LwL is the luminance observed at the viewing angle θ, and the _LwL is the image light when the image light for the right eye is made black and the image light for the left eye is made white through the image transmission part for the left eye. _RwL is the luminance observed at the viewing angle θ, and the _RwL is obtained by _passing the image light for the right eye through white and the left eye image light through the left eye image transmission unit. the luminance observed at the viewing angle θ Te, B _R is the image light in the case of the black image light for image light and the left eye for the right eye, it passes through the image light emitted from the right eye polarization region right The luminance observed at a viewing angle θ through the image transmission unit for the eye, and L _wR is black for the image light for the right eye In addition, when the image light for the left eye is made white, the image light is observed at a viewing angle θ through the right-eye image transmission unit, and R _wR represents the image light for the right eye that is white. In addition, the luminance of the image light when the left-eye image light is black is observed at a viewing angle θ through the right-eye image transmission unit.

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