Display device

Abstract

To improve the display quality of a dual view display device more than those of an existing display device.SOLUTION: A display device (1) includes: a display panel (2) having a plurality of pixel pairs (4a) each including a first pixel (5a) and a second pixel (6a); and a parallax barrier substrate (3) for transmitting light emitted from the first pixel (5a) toward a first position and light emitted from the second pixel (6a) toward a second position, while blocking light emitted from the first pixel (5a) toward the second position and light emitted from the second pixel (6a) toward the first position. The distance (D1) between the first pixel (5a) and the second pixel (6a) included in a first pixel pair (4a) among the plurality of pixel pairs is smaller than the distance (D2) between the first pixel pair (4a) and an adjacent second pixel pair (4b).SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The following disclosure relates to display devices. [Background technology]

[0002] A display device that can present multiple individual images corresponding to the viewing direction of a user (observer) on a single display surface is called a multi-view display device. Patent Document 1 listed below discloses an example configuration of a parallax barrier type dual-view display device, which is a type of multi-view display device and can display different images in the left and right directions. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 5474731 specification Summary of the Invention [Problem to be solved by the invention]

[0004] When a dual-view display device is used as an in-vehicle Center Information Display (CID), it can deliver the desired image to the driver's seat and passenger seat (at ±30°), but there is a problem in that the image on the opposite side is visible at deep angles (outside of approximately ±60°). This can cause undesirable images on the passenger seat side to be visible from the driver's seat, or the image on the passenger seat side to be reflected on the side window, which can hinder the driver's safe driving. An object of one embodiment of the present disclosure is to improve the display quality of dual-view display devices compared to conventional devices. [Means for solving the problem]

[0005] In order to solve the above problem, a display device according to one embodiment of the present disclosure is a display device that presents a first image to a first user located at a first position relative to a display surface, and presents a second image to a second user located at a second position different from the first position relative to the display surface, and includes: a display panel having a plurality of pixel pairs, each including a first pixel that contributes to forming the first image on the display surface and a second pixel that contributes to forming the second image on the display surface and is adjacent to the first pixel; and a parallax barrier pattern that transmits light traveling from the first pixel to the first position and light from the second pixel to the second position, and blocks light traveling from the first pixel to the second position and light from the second pixel to the first position, wherein the distance between the first pixel and the second pixel of a first pixel pair included in the plurality of pixel pairs is narrower than the distance between the first pixel pair and a second pixel pair adjacent to the first pixel pair. [Effects of the Invention]

[0006] According to one aspect of the present disclosure, it is possible to improve the display quality of a dual view display device compared to conventional methods. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 2 is a diagram schematically illustrating a dual view display of the display device according to the first embodiment. [Figure 2] FIG. 2 is a schematic cross-sectional view of the display device. [Figure 3] FIG. 2 is an exploded perspective view illustrating components of the display device. [Figure 4] FIG. 2 is a plan view showing the relationship between a display panel and a parallax barrier pattern provided in the display device. [Figure 5] 3A and 3B are cross-sectional and plan views showing the relationship between the display panel and a parallax barrier pattern. [Figure 6] FIG. 10 is a plan view showing the relationship between a display panel and a parallax barrier pattern provided in a display device in a comparative example. [Figure 7]10A and 10B are cross-sectional and plan views showing the relationship between the display panel and a parallax barrier pattern in a comparative example. [Figure 8] 3 is a schematic diagram showing image areas of a first image and a second image of the display device in the first embodiment. FIG. [Figure 9] FIG. 10 is a schematic diagram showing image areas of a first image and a second image of a display device in a comparative example. [Figure 10] 10 is a graph showing the relationship between the user angle and the transmittance of the first image and the second image in the comparative example. [Figure 11] 10 is another graph showing the relationship between the user angle and the transmittance of the first image and the second image in the comparative example. [Figure 12] 10 is yet another graph showing the relationship between the user angle and the transmittance of the first image and the second image in the comparative example. [Figure 13] 10 is a graph showing the relationship between the user angle and the transmittance of the first and second images in the first embodiment. [Figure 14] FIG. 2 is a diagram for explaining a public mode in dual view of the display device according to the first embodiment. [Figure 15] FIG. 10 is a diagram illustrating a dual view mode in the dual view mode. [Figure 16] FIG. 10 is a diagram illustrating a privacy mode in the dual view mode. [Figure 17] 10A and 10B are diagrams showing gap images and visible range images at separation angles of ±45 degrees of the display device in the first embodiment. [Figure 18] 10A and 10B are diagrams showing gap images and viewable range images of the display device at separation angles of ±30 degrees. [Figure 19] 10A and 10B are diagrams showing gap images and view range images of the display device at separation angles of ±20 degrees. [Figure 20] 10 is a graph showing another relationship between the user angle and the transmittance of the first image and the second image in the comparative example. [Figure 21]10 is a graph showing another relationship between the user angle and the transmittance of the first and second images in the first embodiment. [Figure 22] 4 is a schematic cross-sectional view of another display device according to the first embodiment. FIG. [Figure 23] FIG. 10 is a schematic cross-sectional view of a display device according to a second embodiment. [Figure 24] FIG. 10 is a perspective view illustrating components of the display device according to the second embodiment. [Figure 25] FIG. 10 is a schematic cross-sectional view of another display device according to the second embodiment. [Figure 26] 11A and 11B are cross-sectional and plan views showing the relationship between a display panel and a parallax barrier pattern of a display device in accordance with Embodiment 3. [Figure 27] 10 is a graph showing the relationship between the user angle and the transmittance of the first and second images in another comparative example. [Figure 28] 10 is another graph showing the relationship between the user angle and the transmittance of the first and second images in another comparative example. [Figure 29] 10 is yet another graph showing the relationship between the user angle and the transmittance of the first and second images in another comparative example. [Figure 30] 11 is a graph showing the relationship between the user angle and the transmittance of the first and second images in the third embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0008] [Embodiment 1] An embodiment of the present invention will be described in detail below. For convenience of explanation, components having the same functions as those described above will be denoted by the same reference numerals in the following embodiments, and their description will not be repeated. For simplicity, descriptions of matters similar to those in known technology will also be omitted as appropriate. Unless otherwise specified, the components and numerical values ​​described in this specification are merely examples. Therefore, for example, unless otherwise specified, the positional and connection relationships of the components are not limited to those shown in the figures.

[0009] Fig. 1 is a diagram schematically illustrating dual view display on a display device 1 according to embodiment 1. Fig. 1 illustrates two users as viewers of an image displayed on the display device 1. In this specification, one of the two users is referred to as a first user U1, and the other is referred to as a second user U2.

[0010] The display device 1 is a parallax barrier dual view display capable of displaying different images in the left and right directions. The display device 1 presents a first image 190A to a first user U1 located at a first position relative to a display surface 319 of the display device 1, and presents a second image 190B to a second user U2 located at a second position different from the first position relative to the display surface 319. In the example of FIG. 2, the first user U1 is located on the negative side of the X direction relative to the display device 1. The second user U2 is located on the positive side of the X direction relative to the display device 1. When the display device 1 is employed as an in-vehicle CID (Center Information Display), the first user U1 may be a driver located in the driver's seat, and the second user U2 may be a passenger located in the passenger seat. Conversely, the first user U1 may be a passenger and the second user U2 may be the driver.

[0011] Fig. 2 is a schematic cross-sectional view of the display device 1. Fig. 3 is an exploded perspective view for explaining the components of the display device 1.

[0012] The display device 1 includes a liquid crystal panel 2 (display panel, liquid crystal display panel) including a color filter glass 10, a parallax barrier substrate 3 bonded to the color filter glass 10 with an adhesive 11, a front polarizing plate 12 bonded to the parallax barrier substrate 3, a rear polarizing plate 13 bonded to the liquid crystal panel 2 on the side opposite to the front polarizing plate 12, and a backlight 14 provided on the rear polarizing plate 13 on the side opposite to the liquid crystal panel 2.

[0013] The liquid crystal panel 2 has a plurality of first pixel pairs 4a (pixel pairs), each including a first pixel 5a that contributes to the formation of a first image 190A on the display surface 319 and a second pixel 6a that contributes to the formation of a second image 190B on the display surface 319 and is adjacent to the first pixel 5a. The liquid crystal panel 2 also has a plurality of second pixel pairs 4b (pixel pairs), each including a first pixel 5b that contributes to the formation of the first image 190A and a second pixel 6b that contributes to the formation of the second image 190B and is adjacent to the first pixel 5b. The first pixel 5a, the second pixel 6a, the first pixel 5b, and the second pixel 6b may be apertures.

[0014] The parallax barrier substrate 3 includes a glass member 7 that transmits light, and a plurality of light-shielding patterns 8 formed in a stripe pattern on the glass member 7. The light-shielding patterns 8 transmit light traveling from the first pixels 5a and 5b toward the first user U1 at the first position and light traveling from the second pixels 6a and 6b toward the second user U2 at the second position, and block light traveling from the first pixels 5a and 5b toward the second user U2 at the second position and light traveling from the second pixels 6a and 6b toward the first user U1 at the first position. Thus, the parallax barrier substrate 3 includes a plate-shaped glass member 7 and a plurality of light-shielding patterns 8 formed in a stripe pattern on the glass member 7. The light-shielding patterns 8 include a black resin or a light-shielding metal material. The slits 9 formed between adjacent light-shielding patterns 8 need to be shifted relative to the pixels so as to focus light on the viewer, allowing the viewer to view the desired image across the entire panel. For this reason, the positions of the slits 9 on the parallax barrier substrate 3 relative to the pixels of the liquid crystal panel 2 are not uniform across the surface. Using the pixel at the center of the display surface 319 as the reference pixel, the positions of the slits 9 relative to the pixels are shifted slightly towards the left and right. However, in reality, the shift is not even one pixel.

[0015] The adhesive 11 includes a liquid transparent adhesive (OCR (Optical Clear Resin)) or an optically transparent sheet-type adhesive (OCA (Optical Clear Adhesive)).

[0016] Fig. 4 is a plan view showing the relationship between the liquid crystal panel 2 and the parallax barrier substrate 3 provided in the display device 1. Fig. 5 is a cross-sectional view and a plan view showing the relationship between the liquid crystal panel 2 and the parallax barrier substrate 3.

[0017] The parallax barrier substrate 3 transmits light traveling from the first pixels 5a and 5b toward a first user U1 at a first position and light traveling from the second pixels 6a and 6b toward a second user U2 at a second position, and blocks light traveling from the first pixels 5a and 5b toward a second user U2 at a second position and light traveling from the second pixels 6a and 6b toward a first user U1 at the first position.

[0018] The parallax barrier substrate 3 includes slits 9 (transmissive regions) formed in a stripe shape along a boundary 17 between the first pixels 5a and the second pixels 6a when viewed in a direction perpendicular to the display surface 319, in order to transmit light traveling from the first pixels 5a and 5b toward a first user U1 at a first position and light traveling from the second pixels 6a and 6b toward a second user U2 at a second position. A center line CL of the slits 9 is located at a position corresponding to the boundary 17.

[0019] A plurality of first pixel pairs 4a are arranged along the Y direction. The first pixel 5a and the second pixel 6a of each first pixel pair 4a are adjacent to each other along the X direction. A plurality of second pixel pairs 4b are arranged along the Y direction. The first pixel 5b and the second pixel 6b of each second pixel pair 4b are adjacent to each other along the X direction.

[0020] A distance D1 between the first pixel 5a and the second pixel 6a of the first pixel pair 4a is narrower than a distance D2 between the first pixel pair 4a and the second pixel pair 4b adjacent to the first pixel pair 4a.

[0021] The first pixels 5a and 5b and the second pixels 6a and 6b can each be a blue pixel for emitting blue light, a green pixel for emitting green light, or a red pixel for emitting red light.

[0022] The liquid crystal panel 2 includes a plurality of rectangular pixel regions 15 arranged in a matrix. Each pixel region 15 has a pixel pitch Pp. The barrier pitch Pb of the light-shielding pattern formed on the parallax barrier substrate 3 is approximately equal to twice the pixel pitch Pp. The pitch Pa2 between the second pixel 6a of the first pixel pair 4a and the first pixel 5b of the second pixel pair 4b is larger than the pitch Pa1 between the first pixel 5b and the second pixel 6b of the second pixel pair 4b.

[0023] In each pixel region 15, three first pixels 5a each including a blue pixel, a green pixel, and a red pixel are arranged, three second pixels 6a each including a blue pixel, a green pixel, and a red pixel are arranged, three second pixels 5b each including a blue pixel, a green pixel, and a red pixel are arranged, or three second pixels 6b each including a blue pixel, a green pixel, and a red pixel are arranged.

[0024] The display device 1 has a gap G1 between the pixel of the liquid crystal panel 2 and the light-shielding pattern 8 of the parallax barrier substrate 3.

[0025] Fig. 6 is a plan view showing the relationship between a liquid crystal panel 2 and a light-shielding pattern 8 provided in a display device in a comparative example. Fig. 7 is a cross-sectional view and a plan view showing the relationship between the display panel and a parallax barrier pattern in the comparative example.

[0026] The distance D3 between the first pixel 5a and the second pixel 6a of the first pixel pair 4a is equal to the distance D3 between the first pixel pair 4a and the second pixel pair 4b adjacent to the first pixel pair 4a.

[0027] The display device according to the comparative example has a gap G2 between the pixel of the liquid crystal panel 2 and the light-shielding pattern 8. The gap G2 is larger than the gap G1.

[0028] Fig. 8 is a schematic diagram showing the image ranges of the first image 190A and the second image 190B of the display device 1 in embodiment 1. Fig. 9 is a schematic diagram showing the image ranges of the first image 190A and the second image 190B of the display device in the comparative example.

[0029] A Dual View Display, which uses a parallax barrier system to display different images to the left and right, can deliver the desired image in a ±30° direction, but at deeper angles (outside of ±60°), the image on the opposite side is visible. When used as an in-vehicle Center Information Display (CID), there are issues such as unwanted images from the passenger seat being visible from the driver's seat, or the image from the passenger seat being reflected on the side window, which can interfere with safe driving.

[0030] For example, as shown in FIG. 9, the second passenger user U2 has a A = Angle θ deeper than 30 degrees B In this case, the driver's seat side image for the first user U1, who is the driver in the driver's seat, is visible.

[0031] When used in an in-vehicle CID, the driver's seat and passenger seat are positioned at roughly ±30° relative to the display, so the gap between the shading pattern 8 and the pixels of the liquid crystal panel 2 is set to make the separation angle 60° (±30°), but in this case, there is an angle at which the opposite image is visible 60° further out (±90°). Narrowing the gap and widening the separation angle can be done to prevent the opposite image from being seen even at deep angles, but there is a trade-off in that the image quality from the driver's seat and passenger seat is reduced.

[0032] Therefore, in this embodiment, in the pixel design of the liquid crystal panel 2 of the display device 1, two pixels, one on the left and one on the right, a first pixel 5a that contributes to the formation of the first image 190A and a second pixel 6a that contributes to the formation of the second image 190B and is adjacent to the first pixel 5a, are considered as one pixel pair, and are shifted toward the center so that the first pixel 5a and the second pixel 6a are closer to each other.The separation angle is then adjusted by narrowing the gap between the light-shielding pattern 8 and the pixel of the liquid crystal panel 2.This makes it possible to optimize the separation angle while preventing the image on the opposite side of the passenger seat from being seen from the driver's seat.

[0033] For example, as shown in FIG. 8, a second passenger user U2 has a θA = Angle θ deeper than 30 degrees B In this case, the driver's seat side image for the first user U1 who is the driver in the driver's seat cannot be seen, but the passenger seat side image for the second user U2 can be seen.

[0034] 10 to 12 are graphs showing the relationship between the user angle and the transmittance of the first image 190A and the second image 190B in the comparative example. Fig. 13 is a graph showing the relationship between the user angle and the transmittance of the first image 190A and the second image 190B in the first embodiment.

[0035] The horizontal axis represents the angle θ shown in Figure 1, and the vertical axis represents the transmittance. The horizontal axis is in degrees, and the vertical axis is in arbitrary units. θ represents the tilt angle in the X direction relative to the Y axis. As shown in Figure 1, when the optical axis of interest is optical axis 1310 in Figure 1, θ = 0°.

[0036] In this specification, when the direction of the optical axis of interest coincides with the negative direction of the X direction, θ=-90°. Therefore, when the optical axis of interest is optical axis 1320 in FIG. 1, θ<0°. In the example of FIG. 1, the first user U1 is located on the side where θ is negative. In FIG. 1, the side where θ is negative is written as "θ=-side." In FIG. 1, "θ=-side" corresponds to the first position.

[0037] 10, in the comparative example, the optimum position of the optimum position curve L1 of the first image 190A is optimum for the first user U1 in the driver's seat, and the optimum position of the optimum position curve L2 of the second image 190B is optimum for the second user U2 in the passenger seat. There are problems in that the secondary image representing the opposite image of the second user U2 in the passenger seat as seen by the first user U1 in the driver's seat appears at a deep angle exceeding a separation angle of -60° as indicated by the dashed line S2, and in that the secondary image representing the opposite image of the first user U1 in the driver's seat as seen by the second user U2 in the passenger seat appears at a deep angle exceeding a separation angle of 60° as indicated by the dashed line S1.

[0038] If gap G2 is simply reduced to gap G1, the secondary image will not be visible to first user U1 and second user U2, but the maximum position of optimal position curve L1 will shift outward from first user U1, as shown in Figure 11. Also, the maximum position of optimal position curve L2 will shift outward from second user U2. The optimal position curves L1 and L2 are based on luminance and crosstalk, an index that indicates the degree to which the opposite image is reflected.

[0039] If the pitch Pa1 is simply shortened, the optimum position curves L1 and L2 will shift inward, as shown in Figure 12. As a result, the secondary video will be seen at a deep angle, with a separation angle exceeding 60°, as shown by the dashed lines S1 and S2, just as in the conventional method.

[0040] Therefore, when pitch Pa1 is shortened and gap G2 is reduced to gap G1, the optimum position of optimum position curve L1 for first image 190A is optimal for the driver's seat, and the optimum position of optimum position curve L2 for second image 190B is optimal for the passenger seat, as shown in Fig. 13. Furthermore, the secondary video becomes invisible to first user U1 and second user U2. The gap G1 is preferably 1.1 times or less the pixel pitch Pp, and more preferably in the range of 0.8 to 1.0 times. This is about 70% of the gap G2 of 1.1 to 1.5 times that used in the design of the comparative example.

[0041] Fig. 14 is a diagram illustrating a public mode in the dual view display of display device 1 according to embodiment 1. Fig. 15 is a diagram illustrating a dual view mode in the dual view display. Fig. 16 is a diagram illustrating a privacy mode in the dual view display.

[0042] The display device 1, which is a dual view display, has a public mode shown in FIG. 14, a dual view mode shown in FIG. 15, and a privacy mode shown in FIG.

[0043] In public mode, first image 190A and second image 190B are images of the same content. In dual view mode, first image 190A and second image 190B are images of different content. In privacy mode, first image 190A is not displayed, and only second image 190B is displayed. Public mode, dual view mode, and privacy mode can be switched between by changing the content of first image 190A and second image 190B.

[0044] Fig. 17 is a diagram showing a gap image and a visible range image at a separation angle of ±45 degrees for the display device 1 in embodiment 1. Fig. 18 is a diagram showing a gap image and a visible range image at a separation angle of ±30 degrees for the display device 1. Fig. 19 is a diagram showing a gap image and a visible range image at a separation angle of ±20 degrees for the display device 1.

[0045] The gap G between the parallax barrier substrate 3 and the liquid crystal of the liquid crystal panel 2 is determined by the pixel pitch Pp. Strictly speaking, the gap G is determined by the pixel pitch Pp and the separation angle θ2, but in in-vehicle applications, the separation angle θ2 is fixed at ≈ 30°, so in practice the gap G is determined by the pixel pitch Pp. With a separation angle of ±30°, it is difficult to achieve both the optimal positions of the first image 190A and the second image 190B and a design that prevents the secondary video from being seen.

[0046] 17 shows the gap image and the visible range image when the separation angle θ2 is 45°. In this case, the optimal positions of the first image 190A and the second image 190B are shifted outward, and the secondary video is not visible.

[0047] 18 shows the gap image and the visible range image when the separation angle θ2 is 30°. In this case, the optimal position of the first image 190A coincides with the first position of the driver's seat, and the optimal position of the second image 190B coincides with the second position of the passenger seat. The secondary image is viewed at a deep angle.

[0048] 19 shows the gap image and the visible range image when the separation angle θ2 is 20°. In this case, the optimal positions of the first image 190A and the second image 190B are shifted inward. As a result, the secondary video is visible over a wide angle range. Fig. 20 is a graph showing another relationship between the user angle and the transmittance of the first image 190A and the second image 190B in the comparative example. Fig. 21 is a graph showing another relationship between the user angle and the transmittance of the first image 190A and the second image 190B in the first embodiment.

[0049] Although an example has been described in which both the first pixel 5a and the second pixel 6a are brought closer to the boundary line between the pixel region 15 to which the first pixel 5a belongs and the pixel region 15 to which the second pixel 6a belongs, it is also possible to bring only one of the first pixel 5a and the second pixel 6a closer to the boundary line.

[0050] FIG. 20 corresponds to FIG. 12, and shows that only the first pixel 5a of the first and second pixels 5a and 6a is moved closer to the boundary line. In this case, only the maximum position of the optimal position curve L1 shifts inward relative to the first user U1. The optimal position curve L2 does not shift. As a result, the secondary image is viewed at a deep angle exceeding a separation angle of 60°, as shown by the dashed lines S1 and S2, just as in the conventional case.

[0051] FIG. 21 corresponds to FIG. 13, and of the first pixel 5a and the second pixel 6a, only the first pixel 5a is moved closer to the boundary line. In this case, only the optimal position curve L2 shifts outward. The optimal position curve L1 does not shift. The secondary image is not visible to the first user U1 in the driver's seat, but is visible to the second user U2 in the passenger seat. Fig. 22 is a schematic cross-sectional view of another display device 1A according to embodiment 1. The components of the display device 1A are the same as those of the display device 1 shown in Figs. 2 and 3, and while the parallax barrier substrate 3 in the display device 1 is arranged on the viewer side of the liquid crystal panel 2, the parallax barrier substrate 3 in the display device 1A is arranged on the backlight 14 (Fig. 3) side of the liquid crystal panel 2. In the display device 1, the color filter glass 10 side of the liquid crystal panel 2 is made thinner, and the thickness of the TFT side of the liquid crystal panel 2 is not an issue, whereas in the display device 1A, the TFT side of the liquid crystal panel 2 is made thinner, and the thickness of the color filter glass 10 side of the liquid crystal panel 2 is not an issue. In the display device 1, the barrier pitch Pb is slightly narrower than twice the pixel pitch Pp, whereas in the display device 1A, the barrier pitch Pb is slightly wider than twice the pixel pitch Pp. The display device 1A includes a liquid crystal panel 2 including a color filter glass 10, a front polarizing plate 12 bonded onto the color filter glass 10, a parallax barrier substrate 3 bonded with an adhesive 11 to the backlight 14 side of the liquid crystal panel 2, and a rear polarizing plate 13 bonded to the side of the parallax barrier substrate 3 opposite to the liquid crystal panel 2. The parallax barrier substrate 3 includes a glass member 7 that transmits light, and a plurality of light-shielding patterns 8 formed in a stripe pattern on the glass member 7 to transmit light traveling from the first pixels 5a and 5b toward the first user U1 at the first position and light traveling from the second pixels 6a and 6b toward the second user U2 at the second position, and to block light traveling from the first pixels 5a and 5b toward the second user U2 at the second position and light traveling from the second pixels 6a and 6b toward the first user U1 at the first position. In the present embodiment, the display panel is a liquid crystal panel, but the present disclosure is not limited to this. The present disclosure can also be applied to a display device including a display panel that includes self-luminous elements such as OLED (organic light-emitting diode), QLED (quantum dot light-emitting diode), micro LED, and nano LED.

[0052] [Embodiment 2] Fig. 23 is a schematic cross-sectional view of a display device 1B according to embodiment 2. Fig. 23 is a perspective view for explaining components of the display device 1B. Fig. 24 is a schematic cross-sectional view of another display device 1C according to embodiment 2.

[0053] The display devices 1B and 1C have a structure in which the glass member 7 and adhesive 11 of the parallax barrier substrate 3 are removed from the display device 1 shown in embodiment 1, but the other structures are the same as those of the display device 1 shown in embodiment 1.

[0054] The display device 1B is an on-cell type display device, and a light-shielding pattern 8 is directly formed on the side of the color filter glass 10 opposite to the liquid crystal panel 2, thereby forming a parallax barrier pattern.

[0055] The display device 1C is an in-cell type display device, and a parallax barrier pattern is formed by directly forming a light-shielding pattern 8 on the liquid crystal panel 2 side of the color filter glass 10. The display device 1C also includes a transparent gap layer 16 for maintaining a gap between the first pixel pair 4a, the second pixel pair 4b, and the light-shielding pattern 8.

[0056] [Embodiment 3] FIG. 26 is a cross-sectional view and a plan view showing the relationship between the liquid crystal panel 2 and the parallax barrier substrate 3 of the display device 1D according to the third embodiment.

[0057] The display device 1D is a display device designed for use in which the liquid crystal panel 2 is placed in front of a first user U1 in the driver's seat.

[0058] The parallax barrier substrate 3 of the display device 1D includes slits 9 (transmissive regions) formed in a stripe shape along the boundary 17 between the first pixels 5a and the second pixels 6a when viewed from a direction perpendicular to the display surface 319, in order to transmit light traveling from the first pixels 5a and 5b toward a first user U1 at a first position and light traveling from the second pixels 6a and 6b toward a second user U2 at a second position. The center line CL of the slit 9 is positioned so as to overlap with the first pixel 5a when viewed from the direction perpendicular to the display surface 319.

[0059] This makes it possible to realize a dual-view display device 1D that can be installed in front of the first user U1 in the driver's seat.

[0060] 27 to 29 are graphs showing the relationship between the user angle and the transmittance of the first image 190A and the second image 190B in another comparative example. Fig. 30 is a graph showing the relationship between the user angle and the transmittance of the first image 190A and the second image 190B in the third embodiment.

[0061] 27, in the comparative example, the optimum position of the optimum position curve L1 of the first image 190A is optimum for the first user U1 in the driver's seat who is positioned directly in front of the display device 1C, and the optimum position of the optimum position curve L2 of the second image 190B is optimum for the second user U2 in the passenger seat. There is a problem that the secondary image representing the opposite image of the second user U2 in the passenger seat as seen by the first user U1 in the driver's seat appears at a deep angle with a separation angle exceeding 60°, as indicated by the dashed line S2, and there is also a problem that the secondary image representing the opposite image of the first user U1 in the driver's seat as seen by the second user U2 in the passenger seat appears at a deep angle with a separation angle exceeding 60°, as indicated by the dashed line S1.

[0062] If gap G2 is simply reduced to gap G1, the secondary video will be invisible to first user U1 and second user U2, as shown in Fig. 28. The maximum position of optimal position curve L1 will not shift from first user U1, and the maximum position of optimal position curve L2 will shift outward from second user U2.

[0063] If the pitch Pa1 is simply shortened, the optimum position curve L2 shifts inward, as shown in Figure 29. As a result, the secondary video will be seen at a deep angle, with a separation angle exceeding 60°, as shown by the dashed lines S1 and S2, just as in the conventional method.

[0064] Therefore, when pitch Pa1 is shortened and gap G2 is reduced to gap G1, the optimum position of optimum position curve L1 of first image 190A is optimum for first user U1 in the driver's seat, and the optimum position of optimum position curve L2 of second image 190B is optimum for second user U2 in the passenger seat, as shown in Fig. 30. Furthermore, the secondary video becomes invisible to first user U1 and second user U2.

[0065] 〔summary〕 A display device according to a first aspect of the present disclosure is a display device that presents a first image to a first user located at a first position relative to a display surface, and presents a second image to a second user located at a second position different from the first position relative to the display surface, and includes: a display panel having a plurality of pixel pairs, each including a first pixel that contributes to forming the first image on the display surface and a second pixel that contributes to forming the second image on the display surface and is adjacent to the first pixel; and a parallax barrier pattern that transmits light traveling from the first pixel to the first position and light from the second pixel to the second position, and blocks light traveling from the first pixel to the second position and light from the second pixel to the first position, and wherein the distance between the first pixel and the second pixel of a first pixel pair included in the plurality of pixel pairs is narrower than the distance between the first pixel pair and a second pixel pair adjacent to the first pixel pair.

[0066] In a display device according to aspect 2 of the present disclosure, in aspect 1, the parallax barrier pattern may include a transmissive region formed in a stripe shape along the boundary between the first pixel and the second pixel when viewed from a direction perpendicular to the display surface, in order to transmit light traveling from the first pixel toward the first position and light traveling from the second pixel toward the second position, and a center line of the transmissive region may be positioned at a position corresponding to the boundary.

[0067] In a display device according to aspect 3 of the present disclosure, in aspect 1 or 2, the parallax barrier pattern may include a transmissive region formed in a stripe shape along the boundary between the first pixel and the second pixel when viewed from a direction perpendicular to the display surface, in order to transmit light traveling from the first pixel toward the first position and light traveling from the second pixel toward the second position, and the center line of the transmissive region may be positioned so as to overlap with the first pixel when viewed from a direction perpendicular to the display surface.

[0068] In a display device according to aspect 4 of the present disclosure, in any one of aspects 1 to 3, the parallax barrier pattern may include a glass member that transmits light traveling from the first pixel toward the first position and light traveling from the second pixel toward the second position, and a light-shielding member formed on the glass member to block light traveling from the first pixel toward the second position and light traveling from the second pixel toward the first position.

[0069] In a display device according to a fifth aspect of the present disclosure, in the fourth aspect, the light blocking member may include a black resin or a metal material.

[0070] In a display device according to a sixth aspect of the present disclosure, in the fourth aspect, the glass member may include a color filter glass.

[0071] In the display device according to Aspect 7 of the present disclosure, in any one of Aspects 1 to 6, the display panel may be a liquid crystal display panel.

[0072] [Additional Notes] The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the claims. Embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the present invention. Furthermore, new technical features can be formed by combining the technical means disclosed in each embodiment. [Explanation of symbols]

[0073] 1 Display device 2 LCD panel (display panel) 3 Parallax barrier substrate (parallax barrier pattern) 4a 1st pixel pair 4b 2nd pixel pair 5a 1st pixel 5b First pixel 6a 2nd pixel 6b Second pixel 7 Glass components 8. Light-shielding pattern (light-shielding material, black resin or light-shielding metal material) 11 Transparent adhesive 190A 1st image 190B 2nd image 319 Display surface U1 First User U2 second user

Claims

1. 1. A display device that presents a first image to a first user located at a first position relative to a display surface, and presents a second image to a second user located at a second position different from the first position relative to the display surface, a display panel having a plurality of pixel pairs, each of the pixel pairs including a first pixel that contributes to forming the first image on the display surface and a second pixel that contributes to forming the second image on the display surface and is adjacent to the first pixel; a parallax barrier pattern that transmits light traveling from the first pixel to the first position and light traveling from the second pixel to the second position, and blocks light traveling from the first pixel to the second position and light traveling from the second pixel to the first position, A display device, wherein a distance between the first pixel and the second pixel of a first pixel pair included in the plurality of pixel pairs is narrower than a distance between the first pixel pair and a second pixel pair adjacent to the first pixel pair.

2. the parallax barrier pattern includes a transmissive region formed in a stripe shape along a boundary between the first pixel and the second pixel when viewed in a direction perpendicular to the display surface, in order to transmit light traveling from the first pixel toward the first position and light traveling from the second pixel toward the second position, The display device according to claim 1 , wherein a center line of the transmissive region is disposed at a position corresponding to the boundary.

3. the parallax barrier pattern includes a transmissive region formed in a stripe shape along a boundary between the first pixel and the second pixel when viewed in a direction perpendicular to the display surface, in order to transmit light traveling from the first pixel toward the first position and light traveling from the second pixel toward the second position, The display device according to claim 1 , wherein a center line of the transmissive region is disposed at a position overlapping with the first pixel when viewed in a direction perpendicular to the display surface.

4. the parallax barrier pattern includes a glass member that transmits light from the first pixel toward the first position and light from the second pixel toward the second position; 2. The display device according to claim 1, further comprising: a light-shielding member formed on the glass member for blocking light from the first pixel toward the second position and light from the second pixel toward the first position.

5. The display device according to claim 4 , wherein the light-shielding member includes a black resin or a light-shielding metal material.

6. The display device of claim 4 , wherein the glass member comprises a color filter glass.

7. The display device according to claim 1 , wherein the display panel is a liquid crystal display panel.

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