JP2012018245A - Stereoscopic image display device and stereoscopic image display method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To lower a resolution necessary for a flat panel display compared with conventional ones.SOLUTION: A stereoscopic image display device emits light via a lenticular lens or a parallax barrier disposed in front of the flat panel display to form righty-eye and left-eye viewpoint groups and displays a multi-viewpoint stereoscopic image. Right-eye and left-eye pixel groups which form viewpoint groups via a cylindrical lens adjoining a same cylindrical lens of the lenticular lens or an opening adjoining a same opening of the parallax barrier are set between the right-eye pixel group and the left-eye pixel group forming the viewpoint groups via the same cylindrical lens or the same opening.

Description

  The present invention relates to a stereoscopic image display apparatus and a stereoscopic image display method, and can be applied to display of a stereoscopic image by a super multi-view display method, for example. The present invention forms a viewpoint only in the right eye vicinity area and the left eye vicinity area by arranging adjacent pixel groups between the right eye pixel group and the corresponding left eye pixel group, In comparison, the resolution required for the flat panel display can be reduced.

  2. Description of the Related Art Conventionally, a super multi-view display type stereoscopic image display device is known as a method of displaying natural stereoscopic images while preventing eye strain caused by accommodation congestion contradiction.

  Here, in the super multi-view display system, for example, a lenticular lens using a cylindrical lens is disposed on the front surface of a flat panel display such as a liquid crystal display panel, and the emitted light of each pixel continuous in the horizontal direction is continuously transmitted in the horizontal direction by the lenticular lens. Sequentially circulate to each viewpoint. Thus, in the super multi-view display type stereoscopic image display device, images corresponding selectively to the right eye and the left eye are provided, and the images provided to the left eye and the right eye change due to a change in viewpoint. Dimensional object shape etc. are displayed.

  Y.Takaki, O.Yokoyama, and G.Hamagishi, "Flat-panel display with slanted pixel arrangement for 16-View display," Proc. SPIE 7237, 08-1-8 (2009 ) Proposes a method of reducing crosstalk between viewpoints by so-called oblique color pixel arrangement.

JP 2009-48134 A

Y.Takaki, O.Yokoyama, andG.Hamagishi, "Flat-panel display with slanted pixel arrangement for 16-Viewdisplay," Proc. SPIE 7237, 08-1-8 (2009)

  By the way, in this kind of stereoscopic image display device, in order to eliminate eye strain and realize smooth motion parallax, it is necessary to generate a large number of viewpoints at high density at intervals equal to or less than the pupil diameter. is there. However, in this type of image display apparatus, since the number of viewpoints and the resolution are in a trade-off relationship, when the number of viewpoints is increased, the resolution is lowered. Therefore, in order to improve the resolution, there is a problem that it is necessary to produce a flat panel display with extremely high definition.

  The present invention has been made in view of the above-described problems, and provides a stereoscopic image display device and a stereoscopic image display method capable of reducing the resolution required for a flat panel display as compared with the conventional art. . For this reason, this invention is comprised from the following technical matters.

(1) The invention of claim 1
Light emitted from the pixel group for the right eye and the pixel group for the left eye sequentially set on the flat panel display is emitted via a lenticular lens or a parallax barrier disposed on the front surface of the flat panel display. And a stereoscopic image display device for displaying a multi-viewpoint stereoscopic image by forming a viewpoint group for the left eye,
The same cylindrical lens of the lenticular lens or the same cylindrical lens between a pixel group for the right eye and a pixel group for the left eye that form a viewpoint group through the same opening of the parallax barrier. A stereoscopic image display device, wherein a right eye pixel group and a left eye pixel group forming a viewpoint group are set through adjacent cylindrical lenses or an opening adjacent to the same opening.

(2) The invention of claim 2
Position detection means for detecting the observer's observation position;
And (1) correcting means for correcting the positions of the right-eye and left-eye pixel groups to a position corresponding to the position of the observer based on the detection result of the position detecting means (1) 3D image display device.

(3) The invention of claim 3
Light emitted from the pixel group for the right eye and the pixel group for the left eye sequentially set on the flat panel display is emitted via a lenticular lens or a parallax barrier disposed on the front surface of the flat panel display. And a stereoscopic image display method for displaying a multi-viewpoint stereoscopic image by forming a viewpoint group for the left eye,
The same cylindrical lens of the lenticular lens or the same cylindrical lens between a pixel group for the right eye and a pixel group for the left eye that form a viewpoint group through the same opening of the parallax barrier. A stereoscopic image display method comprising: setting a pixel group for a right eye and a pixel group for a left eye that form a viewpoint group through an adjacent cylindrical lens or an aperture adjacent to the same aperture.

(4) The invention of claim 4
Detecting the observer's observation position,
The three-dimensional image display method according to (3), wherein the position of the pixel group for the right eye and the left eye is corrected to a position corresponding to the position of the observer based on the detection result.

  According to the present invention, by arranging adjacent pixel groups between a right eye pixel group and a corresponding left eye pixel group, a viewpoint is formed only in the right eye vicinity region and the left eye vicinity region. As a result, the resolution required for the flat panel display can be reduced as compared with the conventional case.

It is sectional drawing with which it uses for description of the conventional stereo image display apparatus. It is sectional drawing with which it uses for description of the stereo image display apparatus which concerns on this invention. It is sectional drawing with which it uses for description about the form different from FIG. It is sectional drawing with which it uses for description of a lenticular lens about the stereo image display apparatus which concerns on 1st Embodiment. FIG. 5 is a continuation of FIG. 4. It is a graph which shows the characteristic of the three-dimensional image display apparatus which concerns on the 1st Embodiment of this invention. It is sectional drawing which shows the three-dimensional image display apparatus which concerns on the 2nd Embodiment of this invention.

  Hereinafter, an example of an embodiment according to the present invention will be described.

(1) Principle FIG. 1 is a cross-sectional view for explaining a stereoscopic image display apparatus according to a conventional super multi-view display system. FIG. 1 is a cross-sectional view of a flat panel display 2 cut out by a plane extending in the horizontal direction. In the stereoscopic image display device 1, the right-eye and left-eye pixel groups 4 </ b> R and 4 </ b> L are sequentially provided on the flat panel display 2. Here, each of the pixel groups 4R and 4L is configured by sequentially arranging pixels corresponding to the respective viewpoints of the stereoscopic image display device 1. In this stereoscopic image display apparatus 1, a lenticular lens 3 using a cylindrical lens is provided on the front surface of the flat panel display 2, and light emitted from the pixels constituting each of the pixel groups 4 </ b> R and 4 </ b> L has a viewpoint corresponding to the lenticular lens 3. Sorted sequentially and cyclically. In this case, in this case, in the flat panel display 2, as shown by the arrows, the right and left eye corresponding pixel groups 4R and 4L forming the left and right viewpoint groups are arranged adjacent to each other through the same cylindrical lens. Is done.

  In the conventional stereoscopic image display device 1, this viewpoint group is formed in a continuous area including the left and right eyes so that stereoscopic viewing is possible even near the center of the right eye and the left eye. For this reason, the width of the region that can be viewed stereoscopically is about twice or more the distance between the eyes. Therefore, when the distance between both eyes is 63 [mm], the width of this area is 126 [mm] or more. When successive viewpoints are generated in this area with an average pupil diameter of 5 [mm], 25 or more viewpoints are generated. I need it. Accordingly, the flat panel display 2 is required to have a high resolution of 25 times or more the resolution related to one viewpoint.

  However, the number of viewpoints can be reduced if the viewpoint formation necessary for stereoscopic vision is limited to the area near the both eyes and the viewpoint is not formed in the invisible area. Resolution can be reduced. In this application, the resolution required for the flat panel display 2 is reduced by such an idea.

  Here, as shown in FIG. 2 in comparison with FIG. 1, pixel groups 4L and 4R (pixel groups having a correspondence relationship indicated by arrows in FIG. 2) forming the left and right viewpoint groups via the same cylindrical lens. A pixel group that forms the left and right viewpoint groups is disposed between the cylindrical lenses adjacent to the cylindrical lens. The arrangement of the pixel groups can be executed by controlling the driving of the flat panel display 2 and further by setting image data supplied to the flat panel display 2.

  Here, 2n pixel groups are arranged between them. Here, n is a natural number, and FIG. 2 is an example where n = 1. FIG. 3 is an example in the case of n = 2, and the pixel groups 4L and 4R that form the left and right viewpoint groups via the same cylindrical lens are indicated by arrows as in the case of FIG.

  For the left and right eyes, let w be the horizontal width (viewing zone width) of the region in which the viewpoint group is created. Since one pixel group 4L or 4R in the flat panel display 2 is an area corresponding to the viewing area width w, the area width formed by 2n pixel groups is 2 nw. Therefore, in the region having the region width 2nw between the left and right eyes, the corresponding viewpoint group related to the stereoscopic view is not formed. Thereby, in this case, a viewpoint group related to stereoscopic vision can be formed only in the vicinity of the right eye and the left eye, respectively, and the resolution of the flat panel display 2 can be reduced. Therefore, the area width of 2nw is 2w in the example of FIG. 2 and 4w in the example of FIG.

That is, in the examples of FIGS. 2 and 3, the distance between both eyes is expressed by 2nw + w. If this distance is 63 [mm], the left and right viewing zone width w is 2nw + w = 63, and this is solved. Is expressed by the following equation.

Accordingly, when V viewpoints are associated with the area of the viewing zone width w, the viewpoint interval v is expressed by the following equation.

  Therefore, if n is increased, the viewpoint interval v can be reduced and a super multi-view state can be realized. In the examples of FIGS. 2 to 3, the case where a lenticular lens is disposed on the front surface of the flat panel display 2 and light emitted from each pixel is selectively output has been described as an example. The present invention can also be widely applied when a barrier is provided.

(2) First Embodiment In this embodiment, based on the above-described principle, a viewpoint group is formed only in an area near both eyes, and viewpoint formation is not performed in an invisible area. The stereoscopic image display apparatus according to this embodiment is configured by arranging the lenticular lens 3 on the front surface of the flat panel display 2 with the configuration shown in FIG. Also, a pixel group was set by n = 1.

Here, it is assumed that the pixel pitch of the flat panel display 2 is p. 4 and 5, the distance between the lenticular lens 3 and the observer is D, and the distance from the lenticular lens 3 to the surface of the flat panel display 2 is d. Here, since the number of viewpoints is V, the width of one pixel group is represented by Vp, and the region by this one pixel group is set so as to correspond to the region of width w. Accordingly, it can be said that two triangles formed for one cylindrical lens shown by hatching in FIG. 4 are similar shapes, and the following relational expression is established for these two triangles.

Further, as shown in FIG. 5 in comparison with FIG. 4, with respect to a region having a width of 2 Vp related to two consecutive pixel groups, a triangle having a base on the surface of the flat panel display 2 (a triangle indicated by hatching in FIG. 5), A similar relationship is also established between this triangle and the triangle whose vertex is the same and whose bottom surface is the lens surface of the lenticular lens, and the following relational expression is established for this triangle. Here, P is the lens pitch of the lenticular lens 3, and is the length of the base of one triangle related to this similarity.

Accordingly, when the equations (3) and (4) are solved, the lens pitch P of the lenticular lens 3 is expressed by the following equation.

Accordingly, the focal length f of the lenticular lens 3 is expressed by the following equation.

  In this embodiment, the lenticular lens 3 is manufactured so as to satisfy the relationship between the expressions (5) and (6). In addition, when a practically sufficient characteristic can be ensured, the conventional lenticular lens 3 may be used as it is.

  FIG. 6 is a chart showing measurement results used for confirmation of viewpoint generation by the created stereoscopic image display device. The measurement result of FIG. 6 is a result of measurement by translating the optical power meter in the horizontal direction using an electric stage so as to block incident light using a pinhole having a diameter of 1 [mm]. FIG. 6A shows the measurement result related to the left-eye viewpoint, and FIG. 6B shows the measurement result related to the right-eye viewpoint. Here, the measurement result of FIG. 6 uses a flat panel display 2 having a so-called diagonal pixel arrangement, and the number of viewpoints is 8 viewpoints (V = 8) on each of the left and right sides. Accordingly, the left and right viewing zone width w is 21 [mm], and the viewpoint interval v is 2.6 [mm]. According to the measurement result of FIG. 6, it can be seen that the viewpoints are densely formed as designed in the vicinity of the right eye and the left eye.

  According to this embodiment, by arranging an adjacent pixel group between a right eye pixel group and a corresponding left eye pixel group, a viewpoint is formed only in the right eye vicinity region and the left eye vicinity region. As a result, the resolution required for the flat panel display can be reduced as compared with the conventional case.

(3) Second Embodiment When the viewpoint is formed only in the right eye vicinity area and the left eye vicinity area as in the above-described embodiment, the viewing area width w is reduced. Accordingly, the range in which the eyes can be moved becomes small, and if the head is moved, the stereoscopic image cannot be normally viewed. Therefore, in this embodiment, the observation position of the observer is detected, and the positions of the right-eye and left-eye pixel groups are corrected to positions corresponding to the observer's position based on the detection result.

  FIG. 7 is a block diagram showing a stereoscopic image display device according to the second embodiment. In this stereoscopic image display device 31, the imaging device 32 is, for example, a video camera, and images the front face of the flat panel display 2 from the flat panel display 2 side, thereby capturing the face of the observer who observes the stereoscopic image. To output the shooting results as video data.

  The viewpoint tracking unit 33 processes the imaging result of the imaging device 32 and tracks the position of the observer's viewpoint based on the front and center positions of the flat panel display 2. In this embodiment, the viewpoint tracking unit 33 is configured by a computer together with the subsequent image synthesis unit 34. As a simple viewpoint tracking method, the viewpoint tracking unit 33 can also detect the observer's face by a pattern matching method, and can detect the center coordinates of the right eye and the left eye from the detection result to track the viewpoint.

  The image synthesizing unit 34 synthesizes and outputs an image for stereoscopic display on the flat panel display 2. In this processing, the image composition unit 34 determines the positions of the right-eye and left-eye pixel groups displayed on the flat panel display 2 based on the detection result of the viewpoint tracking unit 33, corresponding to the position of the observer. To correct. More specifically, the image composition unit 34 determines the viewpoint movement of the observer in the left-right direction with respect to the center of the flat panel display 2 in units of one viewpoint. For example, in FIG. When one viewpoint is moved in the direction, the image displayed on the flat panel display 2 is moved downward by one pixel. Conversely, when the observer's viewpoint moves by one viewpoint in the lower direction of the screen, the image displayed on the flat panel display 2 is moved upward by one pixel. Thus, the stereoscopic image display device 31 displays the stereoscopic image in a sufficiently wide range even when the viewing zone width is reduced by forming the viewpoint only in the right eye vicinity region and the left eye vicinity region. It can be so.

  According to the above configuration, even when the resolution of the flat panel display is reduced by forming the viewpoint only in the right eye vicinity region and the left eye vicinity region, the stereoscopic image is displayed in a sufficiently wide range. I can.

  In addition, this invention is not limited to the above-mentioned embodiment, It can be set as the form which added the various deformation | transformation to the above-mentioned embodiment in the range which does not deviate from the meaning.

  Specifically, in the above-described embodiment, the case where a lenticular lens is used to display a stereoscopic image has been described. However, the present invention is not limited thereto, and a case where a parallax barrier is used instead of the lenticular lens. Can also be widely applied. In this case, each cylindrical lens constituting the lenticular lens corresponds to each opening of the parallax barrier. Therefore, a viewpoint group is formed between the right-eye pixel group and the left-eye pixel group that form the viewpoint group via the same opening of the parallax barrier via the opening adjacent to the same opening. By setting the pixel group for the right eye and the pixel group for the left eye, the resolution of the flat panel display can be reduced as in the above embodiment.

  In the above-described embodiment, the case of using a flat panel display with a so-called diagonal color pixel arrangement has been described. However, the present invention is not limited to this, and also when a flat panel display with a normal matrix pixel arrangement is used. Can be widely applied.

  In the above-described embodiment, the case where the present invention is applied to a super multi-view stereoscopic image display apparatus has been described. However, the present invention is not limited to this, and the normal multi-view stereoscopic image display apparatus is also applicable. Can be widely applied.

1, 11, 21, 31 Stereoscopic image display device 2 Flat panel display 3 Lenticular lens 4L, 4R Pixel group 32 Imaging device 33 View point tracking unit 34 Image composition unit

Claims (4)

Light emitted from the pixel group for the right eye and the pixel group for the left eye sequentially set on the flat panel display is emitted via a lenticular lens or a parallax barrier disposed on the front surface of the flat panel display. And a stereoscopic image display device for displaying a multi-viewpoint stereoscopic image by forming a viewpoint group for the left eye,
The same cylindrical lens of the lenticular lens or the same cylindrical lens between a pixel group for the right eye and a pixel group for the left eye that form a viewpoint group through the same opening of the parallax barrier. A stereoscopic image display device, wherein a right eye pixel group and a left eye pixel group forming a viewpoint group are set through adjacent cylindrical lenses or an opening adjacent to the same opening. Position detection means for detecting the observer's observation position;
The correction means for correcting the position of the pixel group for the right eye and the left eye to a position corresponding to the position of the observer based on the detection result of the position detection means. The stereoscopic image display device according to 1. Light emitted from the pixel group for the right eye and the pixel group for the left eye sequentially set on the flat panel display is emitted via a lenticular lens or a parallax barrier disposed on the front surface of the flat panel display. And a stereoscopic image display method for displaying a multi-viewpoint stereoscopic image by forming a viewpoint group for the left eye,
The same cylindrical lens of the lenticular lens or the same cylindrical lens between a pixel group for the right eye and a pixel group for the left eye that form a viewpoint group through the same opening of the parallax barrier. A stereoscopic image display method comprising: setting a pixel group for a right eye and a pixel group for a left eye that form a viewpoint group through an adjacent cylindrical lens or an aperture adjacent to the same aperture. Detecting the observer's observation position,
The stereoscopic image display method according to claim 3, wherein the positions of the right-eye and left-eye pixel groups are corrected to a position corresponding to the position of the observer based on the detection result.

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