JP2006091642A - Video display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a video image from being seen while resolution of the video image is lowered in a video display device which separates mutually different video images displayed on a screen by a separation means. <P>SOLUTION: Four video images (pixels) "a video image (1), a video image (2), a video image (3), a video image (4)" as the minimum unit video image group are repeatedly arranged in the horizontal direction of the screen and the minimum unit video image groups exist by being shifted in the horizontal direction 2 pixels by 2 pixels for every line. Namely, since the minimum unit video image group consists of four video images (n=4), the minimum unit video image groups exist by being shifted in the horizontal direction by every n/2= 2 pixels by 2 pixels for every line. Then, one opening 1A exists for each minimum unit video image group. Thus, openings 1A are uniformly distributed and it looks that resolution of the video images is improved in comparison with the conventional structure in which a set of openings forms vertical stripes. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a video display device that is used to make an observer stereoscopically view or to show different videos to a plurality of observers.

  Conventionally, a parallax barrier method, a lenticular lens method, and the like are known as methods for realizing stereoscopic image display without requiring special glasses, but these methods are for the right eye having binocular parallax. Video and left-eye video are displayed alternately on the screen, for example, in the form of vertical stripes, and this display video is separated by a parallax barrier, lenticular lens, etc., and guided to the viewer's right and left eyes respectively. It is what makes you see.

  FIG. 5 is an explanatory diagram illustrating the principle of a four-eye stereoscopic image display device. Video (1), video (2), video (3), and video (4) having binocular parallax in the horizontal direction of the screen 11 are arranged at a predetermined pitch, and this “video (1) video (2) video (3 ) Video (4) "is repeatedly present in the minimum unit video group. Each opening 12a of the parallax barrier 12 exists corresponding to each minimum unit video group, and separates “video (1) video (2) video (3) video (4)” which is each minimum unit video group. Give to the observer. Thereby, the observer can perform stereoscopic vision.

  FIG. 6 is an explanatory diagram illustrating the principle of a video display device that displays four different videos to different viewers. This video display device also includes a screen 11 and a parallax barrier 12 as in the stereoscopic video display device shown in FIG. Each opening 12a of the parallax barrier 12 separates each minimum unit video group "video (1) video (2) video (3) video (4)" and gives it to the observer. Thereby, each observer sees a mutually different image | video.

In the case where the same image is displayed using pixels in the vertical direction, the opening 12a of the parallax barrier 12 is generally formed in a vertical strip shape. Further, there is a technique in which the minimum unit video group is shifted in the horizontal direction by one pixel for each row, and the openings of the parallax barrier are arranged in an oblique direction (see Patent Document 1).
Japanese Patent No. 3096613

  However, as described above, when the minimum unit video group is shifted in the horizontal direction by one pixel for each row, the set of apertures of the parallax barrier forms a vertical streak, which has a disadvantage that the resolution appears to be lowered. .

  In view of the above circumstances, an object of the present invention is to prevent the video resolution from appearing to deteriorate in a video display apparatus that separates different videos displayed on a screen by a separating unit.

  In order to solve the above problems, the video display device of the present invention is the video display device that separates n different images (n is an integer of 2 or more) displayed on the screen by the separating means. The minimum unit video group responsible for video display is shifted in the horizontal direction by n / 2 pixels or about n / 2 pixels for each row, and one separation element exists for each minimum unit video group. And

  With the above configuration, the minimum unit video group exists by shifting in the horizontal direction by n / 2 pixels or about n / 2 pixels for each row, and there is one separation element corresponding to each minimum unit video group. Therefore, the separation elements are present in a uniformly dispersed state. For this reason, the resolution of the video appears to be improved as compared with the conventional structure in which the set of separation elements forms a vertical line.

  In the video display device having the above configuration, the outline of each separation element may be parallel to the outline of the pixel.

  Alternatively, in the video display device having the above-described configuration, an oblique line portion that is not parallel to the pixel outline may exist on the outline of each separation element. With a configuration having an oblique line portion, a change in brightness due to a change in relative position between each separation element and a pixel becomes smooth, and diffraction is reduced, so that moire can be reduced. All or a part of the diagonal line portion may rise to the right. All or a part of the oblique line portion may be a right-handed shoulder.

  As described above, according to the present invention, in the video display device that separates different videos displayed on the screen by the separating means, it is possible to prevent the video resolution from being seen to be lowered.

  Hereinafter, an image display device according to an embodiment of the present invention will be described with reference to FIGS. Note that the entire configuration of the video display apparatus can adopt the configurations of FIG. 5 and FIG. 6 described in the conventional section, and the description of the entire configuration is omitted to avoid redundancy due to duplication of explanation.

  FIG. 1A is an explanatory view showing the relationship between the arrangement of pixels and the arrangement of the openings 1A, and FIG. 1B is an explanatory view showing a parallax barrier having the openings 1A. In the configuration shown in FIG. 1, four videos (pixels) “video (1) video (2) video (3) video (4)” which are the minimum unit video group are repeatedly arranged in the horizontal direction of the screen. The unit video group exists by shifting in the horizontal direction by two pixels for each row. That is, since it consists of four videos (n = 4), the minimum unit video group exists in the horizontal direction by n / 2 = 2 pixels for each row. One opening 1A exists for each minimum unit video group. The outline of each opening 1A is parallel to the outline of the pixel, and each opening 1A has a vertically long rectangular shape.

  With the above configuration, the minimum unit video group exists in the horizontal direction by n / 2 pixels for each row, and there is one opening 1A for each minimum unit video group. Therefore, the openings 1A are uniformly distributed. To do. For this reason, it seems that the resolution of the image is improved as compared with the conventional structure in which the set of openings forms a vertical stripe.

  In the configuration shown in FIG. 2, four video (pixels) “video (1) video (2) video (3) video (4)”, which are the minimum unit video group, are repeatedly arranged in the horizontal direction of the screen. The video group exists by shifting in the horizontal direction by two pixels for each row. That is, since it is composed of four videos (n = 4), the minimum unit video group is shifted by 2 (n / 2 = 2) pixels in the horizontal direction for each row. One opening 1B exists for each minimum unit video group. The outline of each opening 1B has an oblique line portion that is not parallel to the outline of the pixel (R, G, B).

  The form of the opening 1B is illustrated in FIGS. Each of the openings 1B has a parallel square shape, and a slanting line portion having a downward slope is present in the vertical line. In the opening 1B shown in FIG. 3A, the upper right corner coincides with the center of the upper side of the center pixel, the lower right corner coincides with the center of the lower side of the right adjacent pixel, and the upper left corner is adjacent to the left in a state where the pixel exists at the center. It matches the center of the upper side of the pixel, and the lower left corner matches the center of the lower side of the central pixel. In the opening 1B shown in FIG. 3B, the upper right corner coincides with the upper left corner of the central pixel, the lower right corner coincides with the lower left corner of the right adjacent pixel, and the upper left corner is adjacent to the left in the state where the pixel exists at the center. It matches the upper right corner of the pixel, and the lower left corner matches the lower right corner of the center pixel. In the opening 1B shown in FIG. 3C, the upper right corner coincides with the upper right corner of the central pixel, the lower right corner coincides with the lower left corner of the right adjacent pixel, and the upper left corner is adjacent to the left in a state where the pixel exists at the center. It matches the upper right corner of the pixel, and the lower left corner matches the lower left corner of the center pixel.

  In the opening 1B of FIGS. 3A and 3B, the horizontal distance between the center of the upper side of the opening and the center of the lower side of the opening is the same as the pixel pitch, and an oblique line portion exists on the pixel in any state. (All positional relationships between the aperture and the pixel are realized in the aperture), so that the influence of light diffraction can be averaged, which is ideal for reducing moire. In the opening 1B of FIG. 3A, adjacent pixels can always be seen, but there is no particular problem. Since it is sufficient that the moire is at a level that cannot be recognized by human eyes, the configuration shown in FIG. 3C may be used, and this configuration increases the effect of reducing residual crosstalk.

  Also in the configuration shown in FIG. 4, there is one opening 1C corresponding to each minimum unit video group. In the outline of each opening 1C, there is an oblique line portion that is not parallel to the outline of the pixel (R, G, B). This opening 1C also has a parallel quadrangular shape, and there is an oblique line portion that rises to the right in the vertical direction line. Even in such a configuration, moire can be reduced.

  In addition, in the opening 1B and the opening 1C, although it has decided to have a diagonal line part in a vertical direction line, it is good also as having a diagonal line part which goes up to the right shoulder, or a diagonal line part which goes down to the right side in a horizontal direction line. In addition, the rectangular opening 1A may have a shape with the corners dropped. Moreover, it can also be set as the shape which dropped the angle | corner (especially acute angle | corner) in the opening 1B and the opening 1C.

  In the example described above, the number of videos is described as n = 4. However, the present invention is not limited to this. For example, when the number of videos is n = 5, the minimum unit video group has 2 pixels (decimal point truncation) or It is shifted in the horizontal direction by 3 pixels (rounded off). That is, there are approximately n / 2 pixels shifted in the horizontal direction, and there is one separation element for each minimum unit video group.

  In the above embodiments, the image separation by the aperture is shown, but a lens element may be used instead of the aperture. In addition, when a self-luminous display element such as an EL (electroluminescence) panel is used, an image separation means is arranged on the front surface of the element. Separation means can also be arranged on the light source side.

FIG. 1A is a diagram illustrating an embodiment of the present invention, in which FIG. 1A is an explanatory diagram showing a relationship between a pixel array and an arrangement of openings of a separating unit in an image display device, and FIG. It is explanatory drawing which showed the parallax barrier which has. It is a figure which shows embodiment of this invention, Comprising: It is explanatory drawing which showed the pixel arrangement | sequence and opening of a isolation | separation means in a video display apparatus. It is a figure which shows embodiment of this invention, Comprising: It is explanatory drawing which showed the example of the shape of opening. It is a figure which shows embodiment of this invention, Comprising: It is explanatory drawing which showed the pixel arrangement | sequence and opening of a isolation | separation means in a video display apparatus. It is explanatory drawing which showed the 4 eye type | mold stereoscopic image display apparatus. It is explanatory drawing which showed the image | video display apparatus which can each guide four different images | videos to an observer.

Explanation of symbols

1A opening 1B opening 1C opening

Claims (5)

In a video display apparatus that separates n different images (n is an integer of 2 or more) displayed on a screen by a separation unit, the minimum unit video group responsible for displaying the different video is n / 2 pixels for each row. Alternatively, the video display device is characterized in that approximately n / 2 pixels are shifted in the horizontal direction and one separation element exists for each minimum unit video group. 2. The video display device according to claim 1, wherein the outline of each separation element is parallel to the outline of the pixel. The video display device according to claim 1, wherein the outline of each separation element includes an oblique line portion that is non-parallel to the pixel outline. 4. The video display device according to claim 3, wherein all or part of the oblique line portion is raised to the right. 4. The video display device according to claim 3, wherein all or a part of the oblique line portion is downwardly sloping.

Images