WO2022254590A1

WO2022254590A1 - Display device and display method

Info

Publication number: WO2022254590A1
Application number: PCT/JP2021/020910
Authority: WO
Inventors: 宗和伊達; 信哉志水; 奏山本
Original assignee: 日本電信電話株式会社
Priority date: 2021-06-01
Filing date: 2021-06-01
Publication date: 2022-12-08

Abstract

A display device (1) according to the present disclosure is provided with an image display unit (2) that has a pixel structure in which a plurality of sub-pixels of different colors are arranged in a first direction and sub-pixels of the same color are arranged in a second direction orthogonal to the first direction, and causes a viewer to view, through an opening region, an image configured by a pixel comprising sub-pixels of C colors arranged in the first direction. The opening region is configured from a plurality of openings having C kinds of displacement amounts and each having a width corresponding to the width of the pixel in the first direction, and the openings (25) having C kinds of displacement amounts are disposed with some being adjacent to each other in the second direction, and are disposed to be displaced by the width of the sub-pixel with respect to each other in the first direction.

Description

Display device and display method

The present disclosure relates to a display device and a display method.

　In order to express a high sense of presence on a display device, it is important to reproduce smooth motion parallax (changes in appearance depending on the viewing position). A multi-view display format is available as a representation format that can express motion parallax. However, in the multi-view display format, switching of viewing zones occurs. Another expression format that can express motion parallax is a super-multiview display format or a high-density directional display format in which the directional density (angle density) of the multiview display format is improved. However, in these representation formats, the amount of data to be provided to the display device becomes enormous.

Patent Documents

1 and 2 disclose techniques for presenting continuous motion parallax with a small number of images by performing linear blending that smoothly changes the luminance ratio of a plurality of images as the observation position moves. disclosed.

Patent Document 3 describes a combination of a liquid crystal panel composed of a plurality of pixels composed of sub-pixels of a plurality of colors and an optical barrier provided in front of the liquid crystal panel and provided with a plurality of openings. Using a liquid crystal panel in which pixels of the same color are arranged, linear blending is performed in a direction parallel to the one direction, and sub-pixels of different colors are arranged in both the first direction and the second direction. A technology is disclosed that reproduces continuous motion parallax with a small device by performing linear blending using a liquid crystal panel.

Further, in Patent Document 4, a liquid crystal panel in which pixels of the same color are arranged in one direction is used, and unlike the linear blending direction in the technology described in Patent Document 3, Techniques for performing linear blending in orthogonal directions are disclosed.

JP 2015-121748 A JP 2016-161912 A JP 2018-180508 A Japanese Patent Application Laid-Open No. 2020-012990

　In stereoscopic display using linear blending, it was required to increase the directivity density in order to expand the display depth range. The angle θ between the direction of the light emitted from the liquid crystal panel and reaching the observation position and the normal direction of the liquid crystal panel is determined by the distance x between the liquid crystal panel and the optical barrier, the pixel width dp, and tan θ=dp/. Since there is a relationship of x, it was necessary to reduce the angle θ in order to increase the directivity density in order to widen the display depth range. In stereoscopic display using linear blending, there is a limit to the maximum amount of parallax between adjacent viewpoint images. Therefore, the display depth range can be widened by decreasing the angle θ to reduce the distance between viewpoints. In addition, the techniques disclosed in

Patent Documents

3 and 4 use blending of only two viewpoint images out of a large number of viewpoint images. However, there is a problem that the transmission efficiency of light transmitted through the optical barrier is low.

An object of the present disclosure, which has been made in view of the above problems, is to provide a display device and a display method that can increase the directivity density in order to widen the display depth range and further improve the brightness. It is in.

In order to solve the above problems, the display device according to the present disclosure has a plurality of sub-pixels of different colors arranged in a first direction, and the sub-pixels of the same color are arranged in a second direction orthogonal to the first direction. an image display unit that has a pixel structure in which pixels are arranged and that allows an observer to observe an image formed of pixels composed of the sub-pixels of C colors arranged in the first direction through an aperture region; wherein the aperture region is composed of a plurality of apertures having a width corresponding to the width of the pixel in the first direction and having C types of shift amount, and the apertures having C types of shift amount are arranged in the second direction; are arranged so that some of them are adjacent to each other in the direction of , and are arranged shifted by the width of the sub-pixel in the first direction.

In order to solve the above problems, the display device according to the present disclosure has a plurality of sub-pixels of different colors arranged in a first direction, and sub-pixels of the same color arranged in a second direction orthogonal to the first direction. An image display that has a pixel structure in which the sub-pixels are aligned and allows an observer to observe an image composed of pixels composed of the sub-pixels of C colors arranged in the first direction through an aperture region. , wherein the aperture region has a width corresponding to m/C of the width of the pixel in the first direction for an integer m satisfying 1<m<C, and has m types of shift amounts. The m kinds of apertures are arranged so that part thereof is adjacent to each other in the second direction, and are arranged with a width shift of the sub-pixel in the first direction.

In order to solve the above problems, the display device according to the present disclosure has a plurality of sub-pixels of different colors arranged in a first direction, and sub-pixels of the same color arranged in a second direction orthogonal to the first direction. An image display that has a pixel structure in which the sub-pixels are aligned and allows an observer to observe an image composed of pixels composed of the sub-pixels of C colors arranged in the first direction through an aperture region. wherein the aperture region has a width corresponding to 1/C of the width of the pixel in the first direction and a width longer than the width of the pixel in the second direction. ing.

Further, in order to solve the above problems, a display method according to the present disclosure is a display method for any one of the display devices described above, in which pixels observed when viewed from a predetermined viewpoint through the opening region Then, the pixels of the image from the viewpoint are displayed on the image display section.

According to the display device and the display method according to the present disclosure, it is possible to widen the display depth range and improve the brightness of the image by increasing the directivity density.

1 is a diagram showing a schematic configuration of a display device according to an embodiment of the present disclosure; FIG. 2 is a diagram showing an example of a configuration of an image display unit shown in FIG. 1; FIG. 3 is a diagram showing another example of the configuration of the image display section shown in FIG. 1; FIG. 2 is a diagram showing a pixel configuration of an image display unit shown in FIG. 1; FIG. It is a figure showing an example of a barrier concerning a 1st embodiment. 5 is a diagram showing in detail the shape of the opening shown in FIG. 4; FIG. 5 is a diagram showing an example of the positional relationship between the pixel configuration of the image display section shown in FIG. 3 and the opening provided in the barrier shown in FIG. 4; FIG. 5 is a diagram showing luminance observed when the opening shown in FIG. 4 is apparently moved in a first direction; FIG. FIG. 5 is a diagram for explaining a "viewpoint" in the configuration using barriers shown in FIG. 4; 2 is a diagram for explaining an example of a method of capturing an image displayed on the display device shown in FIG. 1; FIG. FIG. 4 is a diagram showing the relationship between the weighted average of two images and the contour position; 5 is a diagram showing in detail the contour position observed when the opening shown in FIG. 4 is apparently moved in the first direction; FIG. 5 is a diagram showing another example of the positional relationship between the pixel configuration of the image display section shown in FIG. 3 and the opening provided in the barrier shown in FIG. 4; FIG. It is a figure which shows an example of the barrier which concerns on 2nd Embodiment. 14 is a diagram showing in detail the shape of the opening shown in FIG. 13; FIG. 14 is a diagram showing an example of the positional relationship between the pixel configuration of the image display section shown in FIG. 3 and the opening provided in the barrier shown in FIG. 13; FIG. 14 is a diagram showing luminance observed when the opening shown in FIG. 13 is apparently moved in the first direction; FIG. 14 is a diagram showing another example of the positional relationship between the pixel configuration of the image display section shown in FIG. 3 and the opening provided in the barrier shown in FIG. 13; FIG. It is a figure which shows an example of the barrier which concerns on 3rd Embodiment. 19 is a diagram showing an example of the positional relationship between the pixel configuration of the image display section shown in FIG. 3 and the opening provided in the barrier shown in FIG. 18; FIG. FIG. 19 is a diagram for explaining a "viewpoint" in the configuration using barriers shown in FIG. 18; FIG. 19 is a diagram showing luminance observed when the opening shown in FIG. 18 is apparently moved in the first direction; 19 is a diagram showing another example of the positional relationship between the pixel configuration of the image display section shown in FIG. 3 and the opening provided in the barrier shown in FIG. 18; FIG. 3 is a hardware block diagram of a control unit included in the display device; FIG.

A first embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing a schematic configuration of a display device 1 according to the first embodiment of the invention. The display device 1 according to the present embodiment allows an observer ob to observe an image according to a change in the observation direction (viewpoint position).

A display device 1 shown in FIG.

The image display unit 2 as image display means has sub-pixels of a plurality of colors, sub-pixels of different colors arranged in a first direction, and sub-pixels of the same color arranged in a second direction orthogonal to the first direction. It has a pixel structure in which sub-pixels are arranged, and an observer is allowed to observe an image composed of pixels composed of sub-pixels of a plurality of colors arranged in a first direction through the aperture. The image display section 2 includes a display 21 and a barrier 23 .

The display 21 is composed of a plurality of pixels, each consisting of C color sub-pixels, arranged in a first direction, and an image in which the same color sub-pixels are arranged in a second direction. display. The display 21 includes, for example, a backlight 21a and a two-dimensional light modulation element 21b as shown in FIG. 2A.

The backlight 21a is a surface light source.

The two-dimensional light modulation element 21b is provided in front of the backlight 21a as seen from the observer ob. The two-dimensional light modulation element 21b has a structure in which modulation elements for modulating light emitted from the backlight 21a are arranged two-dimensionally. A liquid crystal panel, for example, can be used as the two-dimensional light modulation element 21b.

The barrier 23 has a plurality of openings formed by a plane including a first direction and a second direction orthogonal to the first direction. The barrier 23 is provided in front of the two-dimensional light modulation element 21b as seen from the observer ob. The barrier 23 transmits part of the light emitted from the backlight 21a and modulated by the two-dimensional light modulation element 21b, and blocks part of the light. That is, the barrier 23 limits the light observed by the observer ob.

The barrier 23 has a plurality of openings, allows light to pass through the openings, and blocks light by the light shielding portions other than the openings. The barrier 23 is composed of, for example, a plate-like member having a thickness that does not affect observation of light transmitted through the opening even when the observer ob looks at the image display section 2 obliquely. Such a barrier 23 can be produced, for example, by making a hole in a light-shielding thin plate that matches the shape of the opening, or by forming a metal thin film on a glass plate that matches the pattern of the light-shielding portion.

In the configuration shown in FIG. 2A, the backlight 21a and the two-dimensional light modulation element 21b included in the display 21 may be configured integrally. , or a liquid crystal display in which a backlight and a liquid crystal panel are integrated. The display 21 can also be an organic EL (Electro Luminescence) display or the like.

Further, as shown in FIG. 2B, the image display unit 2 has a configuration in which a barrier 23 is provided in front of the backlight 21a and a two-dimensional light modulation element 21b is arranged in front of the barrier 23 when viewed from the observer ob. There may be. In this case, the light emitted by the backlight 21a and transmitted through the opening of the barrier 23 is modulated by the two-dimensional light modulator 21b and observed by the observer ob.

In the configuration shown in FIG. 2B, the backlight 21a and the barrier 23 may be configured integrally. As such a configuration, for example, a configuration in which a light source such as an LED (Light Emitting Diode) is arranged only at a position corresponding to the opening of the barrier 23, a pattern corresponding to the opening and the light shielding portion of the barrier 23 in a two-dimensional display. There are various configurations such as a configuration that displays the . A liquid crystal display, an organic EL display, or the like may be used as the two-dimensional display described above.

Also, in FIGS. 2A and 2B, the configuration in which the light emitted from the backlight 21a, which is a surface light source, is modulated by the two-dimensional light modulation element 21b has been described. A display having such a configuration is, for example, a liquid crystal display. However, the display applicable to the present invention is not limited to the display provided with the backlight 21a and the two-dimensional light modulation element 21b as described above, and for example, an organic EL display can also be used. . Further, the backlight 21a may be a directional light source as well as a Lambertian light distribution lambertian light source. In particular, use of a light source having directivity within the range of the viewing zone of the display device can improve light utilization efficiency and reduce power consumption. Furthermore, it goes without saying that the light utilization efficiency may be further improved by providing a microlens array in front of the backlight 21a and condensing the light to individual openings of the barrier 23. FIG.

As described above, in the image display section 2 shown in FIG. 2A, among the light emitted from the backlight 21a and modulated by the two-dimensional light modulation element 21b, the light transmitted through the opening of the barrier 23 is transmitted to the observer ob. observed in Further, in the image display unit 2 shown in FIG. 2B, of the light emitted from the backlight 21a, the light transmitted through the opening of the barrier 23 is modulated by the two-dimensional light modulation element 21b and observed by the observer ob. be done. Thus, in the image display section 2 according to the present embodiment, the observer ob observes the light transmitted through the opening. As described above, the barrier 23 is provided with a plurality of openings through which light corresponding to at least one pixel is transmitted. Therefore, the image display unit 2 according to the present embodiment allows the observer ob to observe an image composed of pixels composed of sub-pixels of a plurality of colors through a plurality of apertures.

In this specification, the phrase "allowing the observer ob to observe through the opening" does not only refer to allowing the observer ob to observe the light transmitted through the opening. and causing the observer ob to observe light substantially equivalent to . Therefore, a configuration in which a light source such as an LED is arranged only at a position corresponding to the opening of the barrier 23, or a configuration in which a pattern corresponding to the opening and the light shielding portion of the barrier 23 is displayed on a two-dimensional display is not necessarily a barrier. Even with a configuration that does not include 23, substantially the same light that has passed through the aperture is observed by the observer ob. Therefore, in this specification, "allowing the observer ob to observe through the opening" also includes allowing the observer ob to observe an image using the image display unit 2 having these configurations.

FIG. 3 is a diagram showing the pixel configuration of the two-dimensional light modulation element 21b. As described above, in the present embodiment, as the image display section 2, it is possible to use an organic EL display or the like that does not have the two-dimensional light modulation element 21b. Therefore, the pixel configuration of the image display unit 2 will be described below.

As shown in FIG. 3, the image display section 2 has pixels in which a plurality of sub-pixels of different colors are arranged in a first direction, and sub-pixels of the same color are arranged in a second direction orthogonal to the first direction. An observer observes an image formed by a pixel having a structure and composed of C color sub-pixels arranged in a first direction through the opening 24 . FIG. 3 shows a structure in which C=3 and three primary color sub-pixels of red (R), green (G), and blue (B) are arranged in stripes. Hereinafter, the direction in which sub-pixels of the same color are arranged (horizontal direction in FIG. 3) is referred to as the first direction, and the direction perpendicular to the first direction (vertical direction in FIG. 3) is referred to as the second direction. direction.

A single pixel px is composed of three sub-pixels, a red sub-pixel R, a green sub-pixel G and a blue sub-pixel B arranged in the first direction. Each of the red sub-pixel R, the green sub-pixel G, and the blue sub-pixel B has a horizontally long shape whose width in the second direction is longer than its width in the first direction. In this embodiment, the sub-pixels are arranged so that the longitudinal direction is the first direction. In the following description, the pixel pitch is dp in both the first direction and the second direction, that is, the pixel width in the first direction and the second direction is dp (square pixels). However, the shape of the pixel px may be a horizontally long shape that is long in the first direction or a vertically long shape that is long in the second direction.

As shown in FIG. 4, the barrier 23 is formed by a plane including a first direction and a second direction orthogonal to the first direction, and has a plurality of openings 24 . The plurality of openings 24 are arranged in contact with each other in the second direction. One opening 24 of the plurality of openings 24 is arranged adjacent to the other opening 24 at a portion in contact with the other opening 24 . Note that the openings 24 adjacent to each other may mean that the openings 24 are in communication with each other, or that the openings 24 are arranged with a sufficiently small interval compared to the width of the openings 24 in the second direction. It may be that there is In FIG. 4, the opening 24 of the barrier 23 is hatched obliquely upward to the right, and the light shielding portions other than the opening 24 are outlined. Moreover, in FIG. 4, only some of the openings 24 are given reference numerals, and the reference numerals of the other openings 24 are omitted.

Also, the plurality of openings 24 are arranged in the first direction at a pitch that is an integral multiple of the sub-pixel width dp/C. That is, the plurality of openings 24 are arranged at a pitch of n×(dp/C) (n is an integer) in the first direction.

Also, the pitch at which the opening regions composed of the plurality of communicating openings 24 are arranged may be a non-integer multiple of the width dp of the pixel in the first direction. As described above, since the plurality of pixels consists of C color sub-pixels having the same width and arranged in the first direction, the width of the sub-pixel in the first direction is equal to the width of the pixel in the first direction. It is 1/C of the width, and 1/3 in the example shown in FIG.

The aperture 24 is composed of C apertures having a width corresponding to the width of the pixel in the first direction, and the C apertures are arranged with a width shift of the sub-pixel in the first direction. Specifically, the opening 24 has

C openings

25a, 25b, 25c, . It is composed of apertures 25z1 (the number of a, b, c, . . . , z1 is C). Aperture 25b is adjacent to aperture 25a in the second direction and is offset from aperture 25a in the first direction by dp/C. Furthermore, the

openings

25a and 25b may communicate with each other at adjacent portions, or may be arranged across a boundary portion that is sufficiently smaller than the width dp/C of the openings 25 in the second direction. may Also, the opening 25c is in contact with the opening 25b in the second direction and is displaced from the opening 25b in the first direction by dp/C, and so on. Further, the opening 25a, the opening 25b, the opening 25c, . In the example shown in FIG. 4, the opening 25a is arranged on the leftmost side, the opening 25b is arranged in the middle, and the opening 25c is arranged on the rightmost side in the second direction. in the second direction is not limited to this, and may be arranged in any order.

The widths in the second direction of the

openings

25a, 25b, 25c, . In addition, since it is sufficient if the frequency at which each sub-pixel is observed is the same, the width in the second direction of the

apertures

25a, 25b, 25c, . The expected value (average value) of is the same. In addition, the “width corresponding to the width dp of the pixel” includes the width dp of the pixel in the first direction, and furthermore, as will be described later in detail, as shown in FIG. In the configuration arranged in front of the two-dimensional light modulation element 21b when viewed, the width of the opening 24 in the first direction may be slightly smaller than the width dp of the pixel in the first direction. Based on the same principle, as shown in FIG. 2B, in a configuration in which the two-dimensional light modulation element 21b is arranged in front of the barrier 23 when viewed from the observer ob, the width of the opening 24 in the first direction is equal to that of the pixel. It may be slightly larger than the width dp in the first direction.

FIG. 5 is a diagram showing in detail the shape of the opening 24 in this embodiment. The shape of the opening 24 will be described in detail with reference to FIG. In this example, the pixel consists of a red sub-pixel R, a green sub-pixel G and a blue sub-pixel B, where C=3.

The opening 24 of the present embodiment is composed of an opening 25a, an opening 25b, and an opening 25c having a width of dp in the first direction and a width of dp/3 in the second direction. The opening 25b is in contact with the opening 25a in the second direction and is offset from the opening 25a by dp/3 in the first direction. Also, the opening 25c is in contact with the opening 25b in the second direction and is shifted from the opening 25b by dp/3 in the first direction. Further, the

openings

25a and 25b are in communication at their contacting portions, and the

openings

25b and 25c are in communication at their contacting portions.

In this way, the plurality of openings 24 are arranged side by side in the first direction and the second direction, thereby forming a plurality of openings 24 arranged side by side in the second direction, Aperture regions extending in the second direction are arranged at the pitch described above in the first direction. That is, the aperture region is composed of a plurality of apertures having a width corresponding to the width dp of the pixel in the first direction and having a shift amount of C types. They are arranged with a shift of the pixel width dp/C. In the example shown in FIG. 4, the aperture region is configured by a plurality of apertures with three types of displacement amounts, each having a width corresponding to the width dp of the pixel in the first direction. They are arranged so that some of them are adjacent to each other in the two directions, and are arranged to be shifted by the sub-pixel width dp/3 in the first direction. In FIG. 4, an opening area formed by a plurality of openings 24 on the left side and an opening area formed by a plurality of openings 24 on the right side are shown.

In the display device 1 according to the present embodiment, when the viewpoint position of the observer ob changes in the first direction, the position of the opening 24 apparently moves with respect to the two-dimensional light modulation element 21b, thereby performing linear blending. Realized.

The linear blending realized in this embodiment will be specifically described. The opening 24 arranged on the left side is, from a predetermined viewpoint, as shown in FIG. They are arranged so that the lower 2/3 of the sub-pixel R3 and the lower 1/3 of the green sub-pixel G3 can be observed. In the example shown in FIG. 6, the pitch at which the plurality of openings 24 are arranged is an integer multiple of the width dp of the pixel in the first direction.

FIG. 7 shows an observation through the opening 24 arranged on the left side when the opening 24 apparently moves in the first direction from the state shown in FIG. 6 as the observation position changes. is the change in luminance received.

In FIG. 7, the luminance observed through the opening 24 arranged on the left side in the state shown in FIG. 6 is shown at "0" shown on the horizontal axis. At "0" in FIG. 1/3 of the green subpixel G3 is observed.

As the observation position changes, the opening 24 apparently moves from the state shown in FIG. 6 to the right in the first direction (corresponding to the right in FIG. 7). , the areas of the red sub-pixel R2, the green sub-pixel G2, and the blue sub-pixel B2 observed through the opening 24 decrease linearly, and the areas of the red sub-pixel R3, the green sub-pixel G3, and the blue sub-pixel B3 decrease linearly. increases linearly. As the viewing position changes, the opening 24 apparently moves leftward in the first direction (corresponding to the leftward direction in FIG. 7) from the state shown in FIG. , the areas of the blue sub-pixel B1, the red sub-pixel R2, and the green sub-pixel G2 observed through the opening 24 increase linearly, and the areas of the blue sub-pixel B2, the red sub-pixel R3, and the green sub-pixel G3 increase linearly. decreases linearly. Since the luminance is proportional to the area of the observed sub-pixel, in the display device 1 according to the present embodiment, when the observation position is moved in the first direction, each of red, green, and blue , linear blending can be realized.

Here, the display method of the display device 1 of this embodiment will be described. The control unit 3 causes the image display unit 2 to display an image from the viewpoint (hereinafter sometimes referred to as a “directional image”) in sub-pixels observed when viewed through the opening from a predetermined viewpoint. do. Specifically, the control unit 3 distributes an image from one viewpoint to combinations of red sub-pixels R, green sub-pixels G, and blue sub-pixels B having numbers corresponding to the viewpoint, and displays the image. .

A “viewpoint” is a straight line passing through the center of each aperture 24 and the center of a certain sub-pixel when the image display unit 2 is viewed from a third direction orthogonal to the first direction and the second direction. is the point where Here, "viewpoint" will be described in detail with reference to FIG. FIG. 8 is a diagram showing a cross section of the image display unit 2 shown in FIG. 6 passing through the midpoint of the opening 24 in the second direction and parallel to the first direction. As described above, the width of the openings 25 constituting the openings 24 in the first direction corresponds to the width dp of the pixels, and the pitch of the openings 24 corresponds to the width of the pixels in the first direction. Five times. The "width corresponding to the pixel width dp" of the opening 24 will be described in detail later. In addition, in the example shown in FIG. 8, the opening 24 shown on the left side is called an opening 24l, and the opening 24 shown on the right is called an opening 24r.

In FIG. 8, a straight line passing through the center of the blue sub-pixel B of the pixel px2 and the center of the opening 24l, and a straight line passing through the center of the blue sub-pixel B of the pixel px7 and the center of the opening 24r, which are indicated by dotted lines. Let the point of intersection be a viewpoint v11. A point of intersection of a straight line passing through the center of the green sub-pixel G of the pixel px2 and the center of the aperture 24l and a straight line passing through the center of the green sub-pixel G of the pixel px7 and the center of the aperture 24r, indicated by the dot-and-dash line, is the viewpoint v12. and A point of intersection of a straight line passing through the center of the red sub-pixel R of the pixel px2 and the center of the aperture 24l and a straight line passing through the center of the red sub-pixel R of the pixel px7 and the center of the aperture 24r is the viewpoint v13. do.

"The width corresponding to the pixel width dp" may include the pixel width dp. Furthermore, the "width corresponding to the pixel width dp" may include a width D' that is slightly smaller than the pixel width dp in the first direction, as shown in Equation (1) below. In equation (1), the distance from the viewpoint to the two-dimensional light modulation element 21b is L, and the distance between the two-dimensional light modulation element 21b and the barrier 23 is x. Similarly, the "width corresponding to the pixel width dp" may include a width slightly larger than the pixel width dp in the first direction. Further, the "width corresponding to the width dp of the pixel" is the width of the pixel in the first direction, which is obtained in consideration of the processing error of the opening 25 forming the opening 24 and the diffraction of the light passing through the opening 24. Widths slightly smaller or larger than dp may be included.

Similarly, the pitch Q' of the opening regions is calculated by the following formula (2), for example.

Here, generally, the distance x between the pixel px and the barrier 23 is about several mm (for example, about 2 mm). Also, the optimum viewing distance L is about several meters (for example, about 1 m). Therefore, the difference between the width dp of the pixel and the width D' of the opening 24 is very small. Therefore, the width D' of the opening 24 and the width dp of the pixel are substantially equal. The same applies to the pitch of the opening regions.

As can be seen from FIG. 8, if the positional relationship between the pixels of the panel and the aperture shifts, the direction of the light rays relative to the pixels shifts from the designed conditions. Therefore, regarding the positional relationship between the two-dimensional light modulation element 21b and the opening of the barrier 23, a mechanism is provided that can relatively adjust the translational movement in the first direction. At least the deviation of pixels from the ideal condition over the entire screen, that is, the state in which the positional relationship between the region composed of pixels corresponding to the aperture 24 and the aperture strictly match, must be less than one pixel. Since it is desirable to be less than /10 pixels, fine adjustments were made so as to fall within this range. Since the fine movement mechanism is expensive, it is needless to say that an image of a shifted viewpoint position may be displayed so as to compensate for the relative positional shift.

For example, as shown in FIG. 9, images displayed on the display device 1 are captured by N cameras 5 (5-1, 5-1, . , 5-N) are arranged in a row along the first direction in which the sub-pixels of different colors are arranged, and the optical axes of the respective cameras 5 are arranged in parallel. The position of each camera 5 corresponds to the position of the viewpoint of the image display section 2 . A plurality of cameras 5 may be arranged facing inward so that the optical axis of each camera 5 faces a specific convergence point, and an image obtained by trapezoidally correcting the captured image may be used as the display image.

The control unit 3 controls the display of the sub-pixels viewed from each viewpoint through the opening 24 according to the image from that viewpoint. For example, the control unit 3 controls the red sub-pixel R and the green sub-pixel G observed through the aperture 24 from the viewpoint of the camera 5-1 according to the captured image of the camera 5-1 among the N cameras. and blue sub-pixel B display. Similarly, the control unit 3 controls the red sub-pixels R, R, The display of green sub-pixel G and blue sub-pixel B is controlled.

In the example shown in FIG. 8, the display of an image captured by a camera installed at a position corresponding to the viewpoint will be described. A blue channel image captured by a camera installed at a position corresponding to the viewpoint v11 is displayed on the blue sub-pixel B of the pixel px2, the blue sub-pixel B of the pixel px7, and other sub-pixels corresponding to the viewpoint v11. A green channel image captured by a camera installed at a position corresponding to the viewpoint v12 is displayed on the green sub-pixel G of the pixel px2, the green sub-pixel G of the pixel px7, and other sub-pixels corresponding to the viewpoint v12. An image of the red channel captured by the camera installed at the position corresponding to the viewpoint v13 is displayed on the red sub-pixel R of the pixel px2, the red sub-pixel R of the pixel px7, and other sub-pixels corresponding to the viewpoint v13. In this example, a mode in which a camera is installed at a position corresponding to a viewpoint and an image is captured is described. Needless to say, it may be displayed.

As a result, by controlling the display of the sub-pixels observed from each viewpoint through the opening 24 according to the image from that viewpoint, the movement of the observation position in the first direction is An image corresponding to each observation position can be observed.

Also, it is preferable that the visual angle corresponding to the parallax of images observed from mutually adjacent viewpoints is 10 minutes or less. That is, it is preferable that the control unit 3 displays an image having an angle of parallax of 10 minutes or less, more preferably 5 minutes or less between images displayed at adjacent viewpoints. The image parallax is the amount of the shift δ between the images of adjacent viewpoints on the screen, which is expressed as an angle when viewed from the assumed distance L, and is expressed below.

In addition, in general captured images, the parallax varies greatly depending on the distance from the camera to the subject, so the displayed image was shot in front of a plain background to avoid areas with large parallax. Also, in this embodiment, each image is translated and displayed so that the parallax of the subject is minimized. By doing so, it was possible to improve the image quality of the observed image. That is, by adjusting the convergence, it was possible to improve the image quality of the observed image. It is clear that a similar effect can be obtained by using a lens with a shallow depth of field and blurring the background other than the subject.

FIG. 10 is a diagram showing the relationship between the weighted average of two images (image A and image B) (hereinafter referred to as "two-viewpoint images") and contour positions. When the directional image is displayed so that the width of the image shift between adjacent viewpoints is a small value of about 3 [arc min], the weighting ratio is 0 to 1, as shown in FIG. Since it changes linearly and continuously between them, an image with an appropriate contour position that matches the viewpoint position was generated. That is, by connecting two images with small image shifts at a ratio that varies linearly, the intermediate viewpoint image is perceived faithfully. Note that in the case of an image with few high-frequency components of the spatial frequency, an image at an intermediate viewpoint is perceived even if the width of the shift is about 10 [arc min].

However, in a configuration in which images from many viewpoints exceeding two viewpoints are blended, as the viewpoint position changes from the center to the edge in the first direction, the contour position is ideal, as shown in FIG. may deviate from a linear change. Specifically, when the viewpoint position is in the center, the change in the contour position in linear blending is symmetrical, so the change is completely linear, but at the ends, the change in the contour position is asymmetrical, so it is slightly different. It may deviate from linear. However, it is possible to realize a nearly linear change in contour position over almost the entire area, and to reproduce smooth motion parallax. In this way, even in a configuration in which images of many viewpoints are blended, the outline position changes roughly linearly. In addition, since the parallax of a high percentage of images to be blended is mainly affected, the visual angle corresponding to the parallax of the images of the viewpoints adjacent to each other is, for example, 3 minutes, similar to the configuration in which the two-viewpoint images are blended. , 5 minutes, or 10 minutes, it is viewed by the viewer as an intermediate viewpoint image.

As described above, according to the first embodiment, the display device 1 has a plurality of sub-pixels of different colors arranged in the first direction, and sub-pixels of the same color arranged in the second direction orthogonal to the first direction. sub-pixels lined up, and allows an observer to observe an image composed of pixels composed of sub-pixels of C colors arranged in a first direction through an aperture region. Prepare. The aperture region is composed of a plurality of apertures having a width corresponding to the width dp of the pixel in the first direction and having C types of shift amounts. are arranged so as to be adjacent to each other and are shifted by the width of the sub-pixel in the first direction. Therefore, the display device 1 was able to widen the display depth range and increase the directivity density. In addition, the brightness of the image can be improved by using the 2C viewpoint image instead of the conventional two viewpoint image for blending the image.

In the example shown in FIG. 6 described above, the pitch at which the plurality of openings 24 provided in the barrier 23 are arranged is an integer multiple of the width dp of the pixel in the first direction. That is, the openings 24 are arranged with a period of (n/3)dp in the first direction, where n is a multiple of three. However, as shown in FIG. 12, the pitch at which the plurality of openings 24 provided in the barrier 23 are arranged may be a non-integer multiple of the width dp of the pixel in the first direction. In such a configuration, the colors of the pixels observed through the two openings 24 arranged next to each other in the first direction are different from each other. In the example shown in FIG. 12, the upper ⅓ of the red sub-pixel R2, the upper ⅔ of the green sub-pixel G2, The entire blue sub-pixel B2, the lower two-thirds of the red sub-pixel R3, and the lower one-third of the green sub-pixel G3 are observed. In this example, through the opening 24 (the opening 24 arranged on the right side in FIG. 12) arranged adjacent to the one opening 24 in the first direction, The upper 2/3 of the blue subpixel B7, the entire red subpixel R8, the lower 2/3 of the green subpixel G8, and the lower 1/3 of the blue subpixel B8 are observed. Since n is not a multiple of 3, the color arrangement of the pixels observed through the openings 24 arranged adjacent to each other in the first direction is different from each other, so that the image is produced by a biased color arrangement. can be avoided, and the viewer can see an image without color shading or color variation. Further, since the colors observed through the adjacent aperture regions in the first direction are different, the ratio of the green sub-pixels, which are observed through the adjacent aperture regions and have a high correlation with the luminance of the image, reaches the maximum value. different angles. Therefore, both pixels observed through respective aperture regions adjacent in the first direction are observed together, and the directivity density is clearly improved.

A second embodiment of the present invention will be described below with reference to the drawings. The same reference numerals are assigned to the same functional units as in the first embodiment, and the description thereof is omitted.

A display device 1 according to the second embodiment includes an image display unit 2 and a control unit 3, like the display device 1 according to the first embodiment. The image display section 2 of the second embodiment includes a backlight 21a, a two-dimensional light modulation element 21b, and a barrier 23-1.

As shown in FIG. 13, the barrier 23-1 is formed by a plane including a first direction and a second direction perpendicular to the first direction, and has a plurality of openings 24-1. The plurality of openings 24-1 are arranged in the second direction such that portions of the openings 24-1 are adjacent to each other in the second direction. Of the plurality of openings 24-1, one opening 24-1 is a portion in contact with the other opening 24-1 and is partially in contact with the other opening 24-1 in the second direction. are arranged adjacent to each other. In FIG. 13, only some of the openings 24-1 are given reference numerals, and the reference numerals of the other openings 24-1 are omitted.

Also, the plurality of openings 24-1 are arranged in the first direction at a pitch that is an integral multiple of the sub-pixel width dp/C. That is, the plurality of openings 24-1 are arranged at a pitch of n×(dp/C) (n is an integer) in the first direction.

Also, the pitch at which the plurality of aperture regions are arranged may be a non-integer multiple of the width dp of the pixel in the first direction. As described above, since the plurality of pixels consists of C color sub-pixels having the same width and arranged in the first direction, the width of the sub-pixel in the first direction is equal to the width of the pixel in the first direction. It is 1/C of the width, and 1/3 in the example shown in FIG.

The aperture 24-1 is composed of a plurality of apertures with m types of shift amount having a width corresponding to m/C of the width dp of the pixel in the first direction, and the m types of apertures are arranged in the second direction. Some of them are arranged so as to be adjacent to each other, and are arranged with a width dp/C of the sub-pixel in the first direction (m is an integer satisfying 1<m<C). First, an example where m=C−1 will be described here with reference to FIG. In such an example, the width in the first direction is ((C−1)/C)×dp, and the width in the second direction is dp/(C−1). -1b, . . . , apertures 25-1z2 (the number of a, b, c, . Opening 25-1b is adjacent to opening 25-1a in the second direction and is offset from opening 25-1a in the first direction by dp/C. Furthermore, the openings 25-1a and 25-1b may communicate with each other at adjacent portions, or may be arranged across a boundary portion that is sufficiently small compared to the width of the opening 25 in the second direction. The same applies hereinafter. Furthermore, opening 25-1a, opening 25-1b, opening 25-1c, .

The widths in the second direction of the openings 25-1a, 25-1b, . Furthermore, since it is sufficient that the frequency of appearance is the same, the expected value of the width in a certain section in the second direction should be the same. Also, the "width corresponding to (C-1)/C of the pixel width dp" may include (C-1)/C of the pixel width dp. Furthermore, "the width corresponding to (C-1)/C of the pixel width" is calculated by the equation (3) from (C-1)/C of the pixel width dp in the first direction. may also include a slightly smaller width D''. Similarly, "a width corresponding to (C-1)/C of the pixel width" may include a width slightly greater than (C-1)/C of the pixel width dp in the first direction. Further, the width corresponding to (C−1)/C of the width of the pixel” is the width of the pixel obtained in consideration of the processing error of the opening 24-1 and the diffraction of light passing through the opening 24-1. It may include a width slightly smaller or slightly larger than (C−1)/C of the width dp in one direction.

FIG. 14 is a diagram showing in detail the shape of the opening 24-1 in this embodiment. The shape of the opening 24-1 will be described in detail with reference to FIG. In this example, the pixel consists of a red sub-pixel R, a green sub-pixel G and a blue sub-pixel B, where C=3.

As shown in FIG. 14, the opening 24-1 of this embodiment has a width of (2/3)×dp in the first direction and an opening 25-1 having a width of dp/2 in the second direction. 1a and an opening 25-1b. The opening 25-1b is in contact with the opening 25-1a in the second direction and is shifted from the opening 25-1a by dp/3 in the first direction. Also, the opening 25-1b communicates with the opening 25-1a at a portion in contact with the opening 25-1a.

In this manner, the plurality of openings 24 are arranged side by side in the first direction and the second direction, thereby forming a plurality of openings 24-1 arranged side by side in the second direction. Also, the open areas extending in the second direction are arranged at the pitch described above in the first direction. That is, for an integer m satisfying 1<m<C, the aperture region has a width dp×(m/C) corresponding to m/C of the width dp of the pixel in the first direction, and has m types of shift amounts. , and the m kinds of apertures are arranged with a shift of the sub-pixel width dp/C in the first direction. The example shown in FIG. 13 shows a case corresponding to C=3 and m=2, and the aperture region has a width corresponding to 1/3 of the pixel width dp in the first direction. is composed of a plurality of apertures of three types, and the three types of apertures are arranged with a shift of the sub-pixel width dp/3 in the first direction. Note that FIG. 13 shows an opening area formed by a plurality of openings 24-1 on the left side and an opening area formed by a plurality of openings 24-1 on the right side.

In the display device 1 according to the present embodiment, linear blending is realized by apparently moving the position of the opening 24 with respect to the two-dimensional light modulation element 21b when the viewpoint position of the observer ob changes.

The linear blending realized in this embodiment will be specifically described. As shown in FIG. 15, the upper half of the red sub-pixel R2, the entire green sub-pixel G2, and the lower half of the blue sub-pixel B2 are visible from the aperture 24-1 at a predetermined viewpoint. are arranged as In the example shown in FIG. 15, the pitch at which the plurality of openings 24-1 are arranged is an integer multiple of the width dp of the pixel in the first direction.

FIG. 16 shows the opening 24-1 located on the left side when the opening 24-1 apparently moves in the first direction from the state shown in FIG. 15 as the viewpoint position changes. 1 is the change in luminance observed through 1.

In FIG. 16, at "0" on the horizontal axis, the luminance observed through the opening 24-1 arranged on the left side in the state shown in FIG. 15 is shown. At "0" in FIG. 16, 1/2 of the red sub-pixel R2, the entire green sub-pixel G2, and 1/2 of the blue sub-pixel B2 are observed through the aperture .

Then, as the viewpoint position changes, as the opening 24-1 shown in FIG. 15 apparently moves to the right in the first direction in the drawing (corresponding to the right in FIG. 16), The areas of the red sub-pixel R2 and the green sub-pixel G2 observed through the aperture 24-1 linearly decrease, and the areas of the blue sub-pixel B2 and the red sub-pixel R3 linearly increase. Also, as the viewpoint position changes, the opening 24-1 apparently moves leftward in the first direction (leftward in FIG. 16) from the state shown in FIG. equivalent), the areas of the blue sub-pixel B1 and the red sub-pixel R2 observed through the aperture 24-1 linearly increase, and the areas of the green sub-pixel G2 and the blue sub-pixel B2 linearly decrease. As described above, in the display device 1 according to the present embodiment, linear blending can be realized for each of red, green, and blue when the viewpoint position is moved in the first direction.

As described above, according to the second embodiment, the display device 1 has a plurality of sub-pixels of different colors arranged in the first direction, and sub-pixels of the same color arranged in the second direction orthogonal to the first direction. sub-pixels lined up, and allows an observer to observe an image composed of pixels composed of sub-pixels of C colors arranged in a first direction through an aperture region. Prepare. In addition, the aperture region is configured by a plurality of apertures having m types of shift amount and having a width corresponding to m/C of the width dp of the pixel in the first direction for an integer m satisfying 1<m<C. The apertures of the kind are arranged so that some of them are adjacent to each other in the second direction, and are arranged offset by a sub-pixel width dp/C in the first direction. As an example, the plurality of openings 24-1 constituting the opening region are (C-1) openings 25 each having a width corresponding to (C-1)/C of the width dp of the pixel in the first direction. The (C−1) openings 25-1 are arranged with a sub-pixel width dp/C shifted in the first direction, and the plurality of openings 24 are mutually arranged in the second direction. Arranged in contact, one opening 24-1 communicates with the other opening 24-1 at a portion in contact with the other opening 24-1. Therefore, in the display device 1 of the second embodiment, the directivity density can be increased by about C times that of the conventional one, so that the display depth range can be widened. C-1) The brightness of the image can be improved by using the viewpoint image. In the above description, it was explained that the opening 24-1 is composed of (C-1) openings 25 each having a width corresponding to (C-1)/C of the width of the pixel in the first direction. is not limited to this. For example, the aperture 24-1 may be composed of (CC ₀ ) apertures 25 having a width corresponding to (CC ₀ )/C of the pixel width in the first direction. Here, _C0 is an integer greater than or equal to 1 and less than C.

In the example of FIG. 15 described above, the pitch at which the plurality of openings 24-1 included in the barrier 23-1 are arranged is an integer multiple of the width dp of the pixel in the first direction. That is, the openings 24-1 are arranged with a period of (n/3)dp in the first direction, where n is a multiple of three. However, as shown in FIG. 17, the pitch at which the plurality of openings 24-1 provided in the barrier 23-1 are arranged may be a non-integer multiple of the width dp of the pixel in the first direction. In such a configuration, the colors of the pixels observed through the two openings 24-1 arranged adjacent to each other in the first direction are different from each other. In the example shown in FIG. 17, through one opening 24-1 (opening 24-1 arranged on the left side in FIG. 17), the upper half of the red sub-pixel R2 and the entire green sub-pixel G2 , the lower half of the blue sub-pixel B2 is observed. In this example, through the opening 24-1 arranged adjacent to the one opening 24-1 in the first direction (the opening 24-1 arranged on the right side in FIG. 17), The upper half of the green subpixel G7, the entirety of the blue subpixel B7, and the lower half of the red subpixel R8 are observed. In this way, since n is not a multiple of 3, the color arrangement of the pixels observed through the apertures 24-1 arranged adjacent to each other in the first direction is different from each other, resulting in an image with biased colors. , and the viewer can observe a high-resolution image.

In the above-described example, the one opening 24-1 is arranged in contact with each other in the second direction, and the portion in contact with the other opening 24-1 In the second direction, one opening 24-1 is aligned with the other opening 24-1 with an interval sufficiently smaller than the width dp of the pixel. may be placed.

A third embodiment of the present invention will be described below with reference to the drawings. The same reference numerals are assigned to the same functional units as in the first embodiment, and the description thereof is omitted.

A display device 1 according to the third embodiment includes an image display unit 2 and a control unit 3, like the display device 1 according to the first embodiment. The image display section 2 of the third embodiment includes a backlight 21a, a two-dimensional light modulation element 21b, and a barrier 23-2.

As shown in FIG. 18, the barrier 23-2 has a plurality of open areas 24-2. In FIG. 18, the opening region 24-2 of the barrier 23-2 is hatched obliquely upward to the right, and the light shielding portions other than the opening region 24-2 are outlined. The plurality of aperture regions 24-2 are arranged in the first direction at a pitch of an integer multiple of the sub-pixel width dp/C, that is, n×(dp/C). Also, the plurality of opening regions 24-2 are arranged in the first direction at a pitch that is an integral multiple of the width dp of the pixel in the first direction. That is, the plurality of open regions 24-2 are arranged at a pitch of n×dp in the first direction. The pitch at which the plurality of opening regions 24-2 are arranged may be a non-integer multiple of the width dp of the pixel in the first direction.

The aperture region 24-2 is formed by an aperture having a width dp/C corresponding to 1/C of the pixel width dp in the first direction and a width longer than the pixel width in the second direction. . Specifically, the width of the aperture region 24-2 in the first direction is "the width corresponding to the sub-pixel width dp/C", which will be described later in detail.

In this embodiment, a pixel is composed of a red sub-pixel R, a green sub-pixel G, and a blue sub-pixel B, so C=3. Therefore, the aperture region 24-2 of the present embodiment is an aperture whose width in the first direction is dp/3 and whose width in the second direction is longer than the width of the pixel. Also, in the example shown in FIG. 18, the width of the opening region 24-2 in the second direction is the width of the barrier 23-2 in the second direction.

The linear blending realized in this embodiment will be specifically described. The aperture region 24-2 is arranged so that the entire red sub-pixel R2 can be observed at a predetermined viewpoint, as shown in FIG. In the example shown in FIG. 19, the pitch at which the plurality of aperture regions 24-2 are arranged is an integer multiple of the width dp of the pixel in the first direction.

Here, the viewpoint in this example will be described with reference to FIG. FIG. 20 is a cross-sectional view of the image display unit 2 along the first direction at an arbitrary position where the opening 24 is arranged. Note that in FIG. 20, the entire barrier 23-2 is reduced with respect to the arrangement in which the sub-pixel is directly below the opening 24. In FIG. Therefore, the widths of the

openings

24l, 24m, and 24r and the intervals between adjacent openings are narrowed. This is the result of a contrivance for forming a "viewpoint", and the details will be described later. Although the pitch of the opening regions is 5 dp in FIG. 19, the case in which the pitch is 3 dp will be described in FIG. FIG. 20 shows ten pixels px (pixels px1 to px10) arranged in the first direction and three apertures 24 (left aperture 24l, center aperture 24m, right aperture 24r). ing. In FIG. 20, there is a deviation on the drawing due to the devised viewpoint formation, but compared to the distance L from the viewpoint position to the display device 1, the width of the opening 24l, the two-dimensional light modulation element 21b and the barrier 23- 2 is extremely small, the actual shrinkage of the barrier 23-2 is negligible. Therefore, the aperture 24l is actually arranged substantially over the green sub-pixel G of the pixel px2. Also, the width of the aperture 24 is slightly narrower than the width dp/C of the sub-pixel, though not as much as in the drawing. In FIG. 20, the misalignment of the arrangement of the

other openings

24m and 24r is similarly emphasized on the drawing, but the actual arrangement will be described below.

In FIG. 20, a straight line passing through the center of the green sub-pixel G of the pixel px2 and the center of the aperture 24l, a straight line passing through the center of the green sub-pixel G of the pixel px5 and the center of the aperture 24m, and , and the point of intersection of a straight line passing through the center of the green sub-pixel G of the pixel px8 and the center of the aperture 24r is defined as a viewpoint v21. A straight line passing through the center of the red sub-pixel R of the pixel px2 and the center of the opening 24l, a straight line passing through the center of the red sub-pixel R of the pixel px5 and the center of the opening 24m, and the red of the pixel px8 are indicated by solid lines. A point of intersection of a straight line passing through the center of the sub-pixel R and the center of the aperture 24r is assumed to be a viewpoint v22. A straight line passing through the center of the blue sub-pixel B of the pixel px1 and the center of the aperture 24l, a straight line passing through the center of the blue sub-pixel B of the pixel px4 and the center of the aperture 24m, and a straight line of the pixel px7. A point of intersection of a straight line passing through the center of the blue sub-pixel B and the center of the aperture 24r is defined as a viewpoint v23. In the example shown in FIG. 20, the colors of pixels immediately below

apertures

24l, 24m and 24r are different. However, as will be described later, the actual distance L from the viewpoint to the two-dimensional light modulation element 21b is the distance between the two-dimensional light modulation element 21b and the barrier 23-2 with respect to x. very large compared to Therefore, in an example where the display 21 shown in FIG. 20 is used, the points of intersection of straight lines passing through the centers of the sub-pixels of the same color and the

openings

24l, 24m, and 24r are actually the viewpoints, as shown in FIG. In addition, the colors of the sub-pixels observed from each viewpoint are the same.

In this way, light from red sub-pixel R, green sub-pixel G, and blue sub-pixel B is observed at viewpoints v21, v22, and v23, respectively. Therefore, by controlling the display of the sub-pixels observed from each viewpoint according to the image from each position of each viewpoint v21, v22, v23, as the observation position moves in the first direction, An image corresponding to the observation position can be observed.

The position and width of the openings 24 are adjusted so that lines passing through the center of each opening 24 and the center of a certain sub-pixel intersect. Specifically, as shown in FIG. 20, if the distance from the observation position to the two-dimensional light modulation element 21b is L, the point at the distance L from the two-dimensional light modulation element 21b, the center of the sub-pixel, and the aperture The position and width of the opening 24 are adjusted so that the center of the portion 24 is aligned. Here, since the distance L (for example, several meters) is very large with respect to the width of the opening 24 (for example, several tens of μm), the adjustment amount of the position and width of the opening 24 is a small value close to the error. be.

As shown in FIG. 20, when the distance from the observation position to the two-dimensional light modulation element 21b is L, and the distance between the two-dimensional light modulation element 21b and the barrier 23-2 is x, the first The width D' in the direction is calculated, for example, by the following equation (4).

As described in the first embodiment, generally, the distance x between the pixel px and the barrier 23-2 is approximately several mm (eg, approximately 2 mm). Also, the optimum viewing distance L is about several meters (for example, about 1 m). Therefore, the difference between the width dp/C of the sub-pixel and the width D' of the aperture 24 is very small. Therefore, the width D' of the opening 24 and the width dp/C of the sub-pixel are substantially equal. The "width corresponding to the width dp/C of the sub-pixel" includes the width dp/C of the sub-pixel, and furthermore, the width of the aperture 24 in the first direction is calculated according to equation (4). , a width D′ that is slightly smaller than the sub-pixel width dp/C in the first direction. Similarly, "a width corresponding to the sub-pixel width dp/C" may include a width slightly larger than the sub-pixel width dp/C in the first direction. The "width corresponding to the sub-pixel width dp/C" is the sub-pixel width dp It may include a width slightly smaller than /C, or a width slightly larger than /C.

As can be seen from FIG. 20, if the positional relationship between the pixels of the panel and the aperture shifts, the direction of the light rays relative to the pixels shifts from the designed conditions. Therefore, for the positional relationship between the two-dimensional light modulation element 21b and the opening of the barrier 23-2, a mechanism is provided that can relatively adjust translational movement in the first direction. At least, the deviation of pixels from the ideal condition over the entire screen, that is, the positional relationship between the region of pixels corresponding to the aperture 24-2 and the aperture, must be less than one pixel. , is desirably less than 1/10 pixel, so fine adjustments were made so as to be within this range. Since the fine movement mechanism is expensive, it is needless to say that an image of a shifted viewpoint position may be displayed so as to compensate for the relative positional shift.

FIG. 21 shows the opening area 24-2 located on the left side when the opening area 24-2 apparently moves in the first direction from the state shown in FIG. 19 as the viewpoint position changes. 2 is the change in brightness observed via .

In FIG. 21, "0" on the horizontal axis indicates the brightness observed through the aperture region 24-2 arranged on the left side in the state shown in FIG. At "0" in FIG. 21, the entire red sub-pixel R2 is observed through the aperture region 24-2.

As the viewpoint position changes, the opening region 24-2 apparently moves from the state shown in FIG. equivalent), the red sub-pixel R2 observed through the aperture region 24-2 decreases linearly, and the green sub-pixel G2 increases linearly. Also, as the viewpoint position changes, the opening area 24-2 apparently moves from the state shown in FIG. equivalent), the red sub-pixel R2 observed through the aperture region 24-2 linearly decreases, and the blue sub-pixel B1 linearly increases. As described above, in the display device 1 according to the present embodiment, linear blending can be realized for each of red, green, and blue when the viewpoint position is moved in the first direction.

As described above, according to the third embodiment, the display device 1 has a plurality of sub-pixels of different colors arranged in the first direction, and sub-pixels of the same color arranged in the second direction orthogonal to the first direction. C color sub-pixels arranged in the first direction, and the observer is allowed to observe the image through the aperture region 24-2. A display unit 2 is provided. The aperture region 24-2 of the display device 1 has a width corresponding to 1/C of the pixel width dp in the first direction and an aperture 25 having a width longer than the pixel width dp in the second direction. -2. Therefore, the display device 1 of the third embodiment can increase the directivity density by about C times that of the conventional one, and thus can widen the display depth range.

In the example of FIG. 19 described above, the pitch at which the plurality of opening regions 24-2 included in the barrier 23-2 are arranged is an integral multiple of the width dp of the pixel in the first direction. That is, the opening regions 24-2 are arranged in the first direction with a period of n/3dp, where n is a multiple of three. However, as shown in FIG. 22, the pitch at which the plurality of opening regions 24-2 of the barrier 23-2 are arranged may be a non-integer multiple of the width dp of the pixel in the first direction. In such a configuration, the colors of the pixels observed through the two aperture regions 24-2 arranged adjacent to each other in the first direction are different from each other. In the example shown in FIG. 22, the entire red sub-pixel R2 is observed through one aperture region 24-2 (the aperture region 24-2 arranged on the left side in FIG. 22). In this example, through the opening region 24-2 arranged adjacent to the one opening region 24-2 in the first direction (the opening region 24-2 arranged on the right side in FIG. 22), The entire green subpixel G7 is observed. In this way, since n is not a multiple of 3, the arrangement of the colors of the pixels observed through the three adjacent aperture regions 24-2 is different from each other. Visibility of images with biased colors is reduced, and color unevenness can be reduced. Furthermore, since only images from two viewpoints are blended, the image becomes darker than in the first and second embodiments, but the observer can observe a high-resolution image with less blurring.

In addition, in the present embodiment, an example in which one pixel is composed of sub-pixels of three primary colors is used, but the present invention is not limited to this. One pixel may consist of four primary colors or sub-pixels of four colors such as red, green, blue and white.

Also, as the barriers 23, 23-1, and 23-2, a device such as a liquid crystal panel that can change the transmittance depending on the location may be used. In this case, by switching the light transmission region by time division and switching the display image in synchronization with it, the image can be displayed even in the light shielding portions of the barriers 23, 23-1, and 23-2, and the resolution can be increased. can be achieved.

<Program>
In order to function as the control unit 3 of the display device 1 described above, it is also possible to use a computer 100 capable of executing program instructions. FIG. 23 is a block diagram showing a schematic configuration of a computer 100 functioning as the controller 3 of the display device 1. As shown in FIG. Here, the computer 100 may be a general-purpose computer, a dedicated computer, a workstation, a PC (Personal Computer), an electronic notepad, or the like. Program instructions may be program code, code segments, etc. for performing the required tasks.

As shown in FIG. 23, the computer 100 includes a processor 110, a ROM (Read Only Memory) 120, a RAM (Random Access Memory) 130, a storage 140, an input section 150, an output section 160, and a communication interface ( I/F) 170. Each component is communicatively connected to each other via a bus 180 . The processor 110 is specifically a CPU (Central Processing Unit), MPU (Micro Processing Unit), GPU (Graphics Processing Unit), DSP (Digital Signal Processor), SoC (System on a Chip), etc. may be configured by a plurality of processors of

The processor 110 controls each component and executes various arithmetic processes. That is, processor 110 reads a program from ROM 120 or storage 140 and executes the program using RAM 130 as a work area. The processor 110 performs control of each configuration and various arithmetic processing according to programs stored in the ROM 120 or the storage 140 . In this embodiment, the ROM 120 or storage 140 stores a program according to the present disclosure.

The program may be stored in a storage medium readable by the computer 100. By using such a storage medium, it is possible to install the program in the computer 100 . Here, the storage medium storing the program may be a non-transitory storage medium. The non-temporary storage medium is not particularly limited, but may be, for example, a CD-ROM, a DVD-ROM, a USB (Universal Serial Bus) memory, or the like. Also, this program may be downloaded from an external device via a network.

The ROM 120 stores various programs and various data. RAM 130 temporarily stores programs or data as a work area. The storage 140 is configured by a HDD (Hard Disk Drive) or SSD (Solid State Drive) and stores various programs including an operating system and various data.

The input unit 150 includes one or more input interfaces that receive user's input operations and acquire information based on the user's operations. For example, the input unit 150 is a pointing device, keyboard, mouse, etc., but is not limited to these.

The output unit 160 includes one or more output interfaces that output information. For example, the output unit 160 is a display that outputs information as video or a speaker that outputs information as audio, but is not limited to these. Note that the output unit 160 also functions as the input unit 150 in the case of a touch panel type display.

The communication interface 170 is an interface for communicating with external devices.

All publications, patent applications and technical standards mentioned herein are expressly incorporated herein by reference to the same extent as if each individual publication, patent application and technical standard were specifically and individually indicated to be incorporated by reference. incorporated herein by reference.

Although the above-described embodiments have been described as representative examples, it will be apparent to those skilled in the art that many modifications and substitutions can be made within the spirit and scope of the present disclosure. Therefore, the present invention should not be construed as limited by the above-described embodiments, and various modifications and changes are possible without departing from the scope of the claims. For example, it is possible to combine a plurality of configuration blocks described in the configuration diagrams of the embodiments into one, or divide one configuration block.

1 display device 2 image display unit 3 control unit 4 imaging target 5, 5-1, 5-k, 5-N camera 21 display 21a backlight 21b two-dimensional light modulation element 23, 23-1, 23-2 barrier 24, 24-1 opening 24-2

opening area

24l, 24m, 24r

opening

25, 25a, 25b, 25c, 25-1a, 25-1b, 25-1z1, 25-1z2 opening

Claims

a pixel structure in which a plurality of sub-pixels of different colors are arranged in a first direction and the sub-pixels of the same color are arranged in a second direction orthogonal to the first direction; an image display unit that allows an observer to observe an image formed by pixels composed of the arranged sub-pixels of C colors through an aperture region;
The aperture region is composed of a plurality of apertures having a width corresponding to the width of the pixel in the first direction and having a shift amount of C types, and the apertures having a shift amount of C types are arranged in the second direction. , the display device is arranged such that parts of the sub-pixels are adjacent to each other and are shifted by the width of the sub-pixels in the first direction.
a pixel structure in which a plurality of sub-pixels of different colors are arranged in a first direction and the sub-pixels of the same color are arranged in a second direction orthogonal to the first direction; an image display unit that allows an observer to observe an image formed by pixels composed of the arranged sub-pixels of C colors through an aperture region;
The aperture region is composed of a plurality of apertures having a width corresponding to m/C of the width of the pixel in the first direction and having m types of shift amounts for an integer m satisfying 1<m<C, The display device, wherein the m kinds of apertures are arranged so that parts thereof are adjacent to each other in the second direction, and are arranged with a width of the sub-pixel shifted in the first direction.
a pixel structure in which a plurality of sub-pixels of different colors are arranged in a first direction and the sub-pixels of the same color are arranged in a second direction orthogonal to the first direction; an image display unit that allows an observer to observe an image formed by pixels composed of the arranged sub-pixels of C colors through an aperture region;
The display, wherein the aperture region has a width corresponding to 1/C of the width of the pixel in the first direction and is configured by an aperture having a width longer than the width of the pixel in the second direction. Device.
The display device according to any one of claims 1 to 3, wherein the plurality of opening regions are arranged in the first direction at a pitch that is an integral multiple of the width of the sub-pixel.
5. The display device according to claim 4, wherein said pitch is not an integer multiple of the width of said pixels in said first direction.
3. The display device according to claim 1 or 2, wherein expected values of the widths of the plurality of openings in the second direction are equal within a certain section in the second direction.
A display method for a display device according to any one of claims 1 to 6,
A display method, wherein pixels of an image from a predetermined viewpoint are displayed on the image display unit as pixels observed through the aperture region from the predetermined viewpoint.
8. The display method according to claim 7, wherein a visual angle corresponding to a parallax of images observed from said viewpoints adjacent to each other is 10 minutes or less.