JP2009015150A - Multi view presentation display device and display control method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent deterioration in resolution of a two-dimensional image by a simple structure even when the two-dimensional image is displayed in a multi-view presentation display device for displaying a three-dimensional image. <P>SOLUTION: The multi-view presentation display devices 50 is provided with a two-dimensional display 51, a view area control part 1, which has a function for dividing the two-dimensional image arranged to cover at least a part of the two-dimensional display 51 to images in a plurality of viewpoints and comprises a lenticular lens having a plurality of cylindrical lenses extended in parallel mutually, and a positional relationship control part 55 controlling the relative positional relationship along the predetermined direction between pixels of the two-dimensional image displayed on the two-dimensional display 51 and a view area control part 1 so that it is periodically varied within a predetermined range. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a display device capable of presenting multiple viewpoints using a lenticular lens, and a display control method executed by the multiple viewpoint presentation display device.

  As an example of a 3D display device with a viewing zone control unit that distributes 2D images displayed on the display into images of multiple viewpoints, it is possible to present multiple viewpoints using a 3D display using slits or a lenticular lens (So-called multi-view) three-dimensional display devices are known.

  In particular, in a multi-lens three-dimensional display device using a lenticular lens, for example, the lenticular lens has a shape in which a plurality of cylindrical lenses are arranged side by side, and images from a plurality of viewpoints are respectively displayed in different directions using the plurality of cylindrical lenses ( A lenticular lens is arranged with respect to the display so as to project only in the direction in which the viewpoint image should be seen. In particular, in order to increase the number of viewpoints that can be displayed simultaneously, a multi-view display system that enables simultaneous display of several tens of viewpoints by attaching lenticular lenses obliquely has also been proposed (see Patent Document 1). In such a multi-view display, the lenticular lens needs to be precisely aligned with the pixels displayed on the display in order to eliminate the shift of the observation position of the image of each viewpoint. For this reason, lenticular lenses are usually permanently mounted and fixed on the display.

  As shown in FIG. 1, in such a multi-lens three-dimensional display device, adjacent pixels 2A to 2E displayed on a display located under a fixed lenticular lens 1 display images of different viewpoints. ing. That is, the pixel 2A displays the viewpoint A image, the pixel 2B displays the viewpoint B image, the pixel 2C displays the viewpoint C image, the pixel 2D displays the viewpoint D image, and the pixel 2E displays the viewpoint E image. ing. For this reason, when a two-dimensional image is displayed on the display, adjacent pixels in the two-dimensional image appear only in different directions, and thus the two-dimensional image appears blurred (coarse). It was.

Therefore, a method has been proposed in which an electro-optic material whose refractive index is changed by selective application of voltage is used as a lens material, and the effect of the lens is turned on / off by the change in the refractive index (see Patent Document 2). .
Japanese Patent Laid-Open No. 9-236777 Special Table 2000-503424

  However, in the method of Patent Document 2, it is necessary to electrically change the refractive index comparable to that of the electro-optic material having the function of a lenticular lens. For that purpose, a large-scale power supply device capable of supplying a high voltage is required. In addition, there were significant manufacturing restrictions such as the need to attach a thin transparent electrode of indium tin oxide (ITO) that uniformly covers the entire lenticular lens.

  Therefore, an object of the present invention is to prevent degradation of the resolution of a two-dimensional image with a simple configuration even when the two-dimensional image is displayed in a multi-viewpoint display device capable of displaying a three-dimensional image.

  To achieve the above object, a multi-view presentation display device according to the present invention is arranged to cover a two-dimensional display and at least a part of the two-dimensional display, and the two-dimensional image displayed on the two-dimensional display. Is a viewing zone control unit that distributes images to a plurality of viewpoint images, and is displayed on the two-dimensional display and the viewing zone control unit configured by a lenticular lens including a plurality of cylindrical lenses extending in parallel to each other. A positional relationship control unit for controlling the relative positional relationship so that the relative positional relationship along a predetermined direction between the pixel of the two-dimensional image and the viewing zone control unit periodically changes within a predetermined range; It is provided with.

  As described above, the multi-viewpoint display device according to the present invention uses a lenticular lens as a viewing zone control unit. In a multi-viewpoint display device using a lenticular lens (also referred to as a multi-view display device), an image at each viewpoint is displayed depending on the positional relationship between the lenticular lens and each pixel of the display. The specific mechanism will be described below. As shown in FIG. 1, the lenticular lens 1 has a shape in which cylindrical lenses are arranged side by side, and its cross section has a shape in which convex lenses are arranged side by side. By arranging such a lenticular lens 1 on a two-dimensional display, a multi-viewpoint display device is realized. As shown in FIG. 1, when the pixels 2 </ b> A to 2 </ b> E of the two-dimensional display are arranged, the light exiting the pixels 2 </ b> A to 2 </ b> E travels in the directions of the arrows of the viewpoints A to E, respectively. In other words, since the images of individual viewpoints can be observed only in the respective viewing directions, a method that enables viewing of images of different viewpoints by moving the viewpoint is the basis of a multi-viewpoint display device. It is a typical method.

  In the present invention, the positional relationship control unit causes a predetermined direction between the pixels of the two-dimensional image displayed on the two-dimensional display and the viewing zone control unit (for example, the direction in which the cylindrical lenses are arranged in the lenticular lens or the horizontal direction of the two-dimensional display. Etc.) is controlled so as to periodically change within a predetermined range.

  At this time, the positional relationship control unit may be configured to vibrate the viewing zone control unit along a predetermined direction with respect to the two-dimensional display whose position is fixed. In addition, the positional relationship control unit displays the two-dimensional image as a moving image so that the pixels of the two-dimensional image displayed on the two-dimensional display vibrate along a predetermined direction with respect to the viewing zone control unit whose position is fixed. You may comprise.

  Hereinafter, a case where the viewing zone control unit is vibrated will be described. When the lenticular lens 1 in FIG. 1 is moved in the left-right direction in FIG. 1, the light exiting the same pixel 2 </ b> C shown in FIG. 2 travels in different directions due to a change in the position of the lenticular lens 1. For example, when the lenticular lens 1 is shifted leftward in FIG. 2 by the movement amount b and the lenticular lens 1 is moved to the position 1B, the light of the pixel 2C advances in the direction of the arrow 21, but the lenticular lens 1 is moved by the movement amount c. In FIG. 2, when the lenticular lens 1 is shifted to the left and moved to the position 1C, the light of the pixel 2C travels in the direction of the arrow 22. When the lenticular lens 1 is shifted rightward in FIG. 2 by the movement amount d and the lenticular lens 1 is moved to the position 1D, the light of the pixel 2C advances in the direction of the arrow 23. Thus, the direction of the light emitted from the same pixel 2C can be changed only by moving the lenticular lens 1 in parallel.

  Therefore, by performing parallel movement of the lenticular lens 1 (that is, vibrating the lenticular lens 1), the light of the pixel 2C travels in all directions as indicated by arrows 21, 22, and 23 in FIG. Thus, a state in which light from the pixel 2C is diffused can be created in a pseudo manner.

  From another point of view, when the lenticular lens 1 is vibrated left and right at high speed as shown in FIG. 4, the upper part of the convex surface of the lenticular lens 1 becomes a quasi-flat shape as shown by a line segment 1X. 1 can be considered to be equivalent to a glass having a substantially uniform thickness. As a result of such an action, the light of the pixel 2C in FIG. 3 can be seen from anywhere. That is, it is possible to present an image equivalent to a state without the lenticular lens 1 (or a state viewed through the diffusion plate). As a result, the two-dimensional image itself displayed on the two-dimensional display can be viewed in a state where there is no resolution degradation. In the example of FIG. 4, the width L for vibrating the lenticular lens 1 needs to be greater than the interval between adjacent peaks and valleys on the convex surface of the lenticular lens 1.

  As described above, the case where the viewing zone control unit is vibrated has been described. However, the positional relationship control unit displays the two-dimensional image as a moving image so that the pixels of the two-dimensional image displayed on the two-dimensional display vibrate along a predetermined direction. You may comprise so that it may be displayed.

  As described above, the two-dimensional image itself displayed on the two-dimensional display is displayed with a relatively simple and simple configuration such as vibrating the viewing zone control unit or displaying a moving image so that the pixels of the two-dimensional image vibrate. Thus, it is possible to view the image with no degradation in resolution.

  In general, as the two-dimensional display becomes higher in definition (that is, as the number of pixels per inch increases), the pixel width becomes smaller. (Advantageous movement distance) is reduced, and it is easy to manufacture a multi-viewpoint display device.

  By the way, in the multi-view presentation display device according to the present invention, the viewing zone control unit, for at least some of the predetermined plurality of regions obtained by dividing the two-dimensional image displayed on the two-dimensional display, A positional relationship control unit provided for each region is configured to individually control the relative positional relationship between the viewing zone control unit provided for each region and the corresponding pixel of the two-dimensional image. Can do. In this case, there is an advantage that only a part of the two-dimensional display can be three-dimensionally displayed and the other regions can be two-dimensionally displayed.

  The invention relating to the above-described multi-viewpoint display device can also be regarded as a method invention, can be described as an invention relating to the following display control method, and has the same operations and effects.

  That is, the display control method according to the present invention is arranged to cover a two-dimensional display and at least a part of the two-dimensional display, and distribute the two-dimensional image displayed on the two-dimensional display into a plurality of viewpoint images. A display control method executed by a multi-viewpoint presentation display device including a viewing area control unit configured by a lenticular lens including a plurality of cylindrical lenses extending in parallel with each other. And a step of displaying a two-dimensional image on the two-dimensional display, and a relative positional relationship along a predetermined direction between the pixel of the two-dimensional image displayed on the two-dimensional display and the viewing zone control unit, And a step of controlling the relative positional relationship so as to periodically change within a predetermined range.

  According to the present invention, even when a two-dimensional image is displayed in a multi-viewpoint display device capable of displaying a three-dimensional image, deterioration of the resolution of the two-dimensional image can be prevented with a simple configuration.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  First, an embodiment of a multi-viewpoint display device that vibrates a viewing zone control unit (lenticular lens) along a predetermined direction with respect to a two-dimensional display whose position is fixed will be described. FIG. 5A is a plan view showing a schematic configuration of the multi-view presentation display device 50, and FIG. 5B is a cross-sectional view taken along line 5-5 in FIG. As shown in FIGS. 5A and 5B, in the multi-view presentation display device 50, the two-dimensional display 51 is fixed to the base 53, and the lenticular lens 1 is disposed so as to cover the two-dimensional display 51. . The lenticular lens 1 is supported by a lenticular lens driving unit 52.

  The lenticular lens driving unit 52 vibrates the lenticular lens 1 along the left-right direction in FIG. 5A with respect to the fixed two-dimensional display 51. Hereinafter, as a configuration example regarding the lenticular lens driving unit 52, a configuration example of a lenticular lens driving unit that vibrates a lenticular lens by an electrical action and a configuration example of a lenticular lens driving unit that vibrates a lenticular lens by a mechanical structure will be described in order. To do.

  FIG. 6A is a plan view showing a configuration of a lenticular lens driving unit that vibrates the lenticular lens 1 by an electric action, and FIG. 6B is taken along line 6-6 in FIG. 6A. A cross-sectional view is shown. Note that the two-dimensional display 51 is not shown. As shown in FIGS. 6A and 6B, a lenticular lens driving unit is mounted on a substrate (for example, glass) 60 fixed to the base 53 of FIG. The lenticular lens driving unit can include a plurality of electrode units 65, 66, 67, 68 disposed on the substrate 60.

  That is, the lenticular lens driving unit includes electrode portions 65 and 68 fixed to the substrate 60 and electrode portions 66 and 67 arranged between the electrode portions 65 and 68 and supporting the lenticular lens 1 from both sides. Is provided. One end of the electrode portion 66 is supported by the support portion 61 via the connection portion 63B, and the other end is supported by the support portion 62 via the connection portion 64B. Similarly, one end of the electrode portion 67 is supported by the support portion 61 via the connection portion 63A, and the other end is supported by the support portion 62 via the connection portion 64A. The support parts 61 and 62 are fixed to the substrate 60, and the connection parts 63A, 63B, 64A and 64B are made of an elastic body or the like and can be bent. As is clear from the cross-sectional view of FIG. 6B, the lenticular lens 1 itself is not fixed to the substrate 60, and due to the bending of the connecting portions 63A, 63B, 64A, 64B, the horizontal direction in FIG. Can be vibrated along.

  The electrode portions 66 and 67 are connected to the voltage applying electrical wiring 62A, the electrode portion 65 is connected to the voltage applying electrical wiring 65A, and the electrode portion 68 is connected to the voltage applying electrical wiring 68A. For example, in a state where a negative potential (for example, −5V) is always applied to the electrical wiring 62A, a positive potential (for example, + 5V) is applied to the electrical wiring 68A, and a negative potential (for example, −5V) is applied to the electrical wiring 65A. Is applied. At this time, as shown in FIG. 7A, the electrode portions 66, 67, 65 have a negative potential, and the electrode portion 68 has a positive potential. As a result, the positive potential electrode portion 68 and the negative potential electrode portion 67 are attracted by the electrostatic force, and a pulling force acts on the negative potential electrode portions 66 and 65. As a result, the lenticular lens 1 is moved in the direction of the arrow 71. Move a little in the direction. On the other hand, a negative potential (for example, -5V) is applied to the electrical wiring 68A while a negative potential (for example, -5V) is always applied to the electrical wiring 62A, and a positive potential (for example, + 5V) is applied to the electrical wiring 65A. Is applied. At this time, as shown in FIG. 7B, the electrode portions 66, 67, and 68 have a negative potential, and the electrode portion 65 has a positive potential. As a result, the positive potential electrode portion 65 and the negative potential electrode portion 66 are attracted by the electrostatic force, and a pulling force acts on the negative potential electrode portions 67 and 68. As a result, the lenticular lens 1 is moved in the direction of the arrow 72. Move a little in the direction. In this way, by controlling the potential applied via the electrical wirings 65A and 68A, the lenticular lens 1 can be vibrated at high speed.

  Note that the absolute value of the potential applied here is not limited to 5V, and a predetermined value other than 5V can be adopted. Also, with respect to the method of applying the potential, other methods than those described above, for example, the electrode portions 66 and 67 are always in the ground (potential 0 V) state, and the potentials applied via the electric wirings 65A and 68A are positive potential and negative potential. Alternatively, a method of alternately converting between and may be adopted.

  FIG. 8 shows a configuration example of a lenticular lens driving unit that vibrates the lenticular lens 1 with a mechanical structure as another example. That is, the lenticular lens driving unit can be configured to include an elliptical disk 81 rotated by a motor (not shown) and a spring 82 installed on the opposite side of the lenticular lens 1 with respect to the disk 81. The spring 82 has a role of pushing the lenticular lens 1 pushed leftward in FIG. 8 back rightward. With such a configuration, the rotation of the elliptical disc 81 causes the lenticular lens 1, the disc 81, and the spring 82 to move to a position indicated by a solid line or a broken line in FIG. It will be. That is, when the elliptical disc 81 is rotated at high speed, the spring 82 pushes the lenticular lens 1 back in the right direction, so that the lenticular lens 1 can be vibrated left and right at high speed.

  When the lenticular lens 1 is vibrated left and right with the configuration shown in FIGS. 6 to 8, the lenticular lens 1 and the two-dimensional display 51 are displayed as shown in FIGS. 9 (a) to 9 (c). The relative positional relationship with the image (for example, the letter “A”) changes. Therefore, the light emitted from the image (for example, the letter “A”) can be seen from anywhere. That is, it is possible to present an image equivalent to a state without the lenticular lens 1 (or a state viewed through the diffusion plate). As a result, the two-dimensional image itself displayed on the two-dimensional display can be viewed in a state where there is no resolution degradation.

  In the above embodiment, an example in which a lenticular lens is vibrated with respect to a fixed two-dimensional display has been described. Conversely, an image displayed on a two-dimensional display is vibrated with respect to a fixed lenticular lens. May be. That is, with the physical positional relationship between the lenticular lens and the two-dimensional display fixed, an image displayed on the two-dimensional display is displayed as a moving image that repeatedly vibrates left and right (for example, the two-dimensional display 51 in FIG. 10). As shown by the letter “A” displayed on the screen, the relative position between the lenticular lens and the image of the two-dimensional display is changed by shifting the image a little, etc. It may be varied. At this time, if the vibration width is too large, the image itself is blurred. For example, by using a high-definition two-dimensional display of 300 dpi or more, the left and right vibration width of the image itself is set to about several pixels. It is desirable that the vibration width be such that humans cannot visually recognize it.

  FIG. 11 shows a functional block configuration of the multi-viewpoint display device 50 according to the present embodiment. The multi-view presentation display device 50 is arranged so as to cover at least a part of the two-dimensional display 51 and the two-dimensional display 51, and distributes the two-dimensional image displayed on the two-dimensional display 51 into images of a plurality of viewpoints. A predetermined direction between the lens (view zone control unit) 1 and the pixels of the two-dimensional image displayed on the two-dimensional display 51 and the lenticular lens 1 (for example, the direction in which the cylindrical lenses are aligned in the lenticular lens or the horizontal direction of the two-dimensional display And a positional relationship control unit 55 that controls the relative positional relationship so that the relative positional relationship changes periodically within a predetermined range. Here, the positional relationship control unit 55 may be configured by the lenticular lens driving unit 52 (see FIG. 5) in the above-described embodiment, or the rotational drive control unit 56 that rotationally drives the elliptical disk 81 of FIG. The image control unit 57 may display an image displayed on the two-dimensional display as a moving image that repeatedly vibrates left and right while the physical positional relationship between the lenticular lens and the two-dimensional display is fixed. You may comprise by.

  In addition, FIG. 12 shows a process flow diagram relating to a display control method executed by the multi-view presentation display device 50 of the present embodiment. As shown in FIG. 12, the processing related to the display control method includes a step S1 for displaying a two-dimensional image on a two-dimensional display, and a predetermined direction between a pixel of the two-dimensional image displayed on the two-dimensional display and a lenticular lens. Step S2 for controlling the relative positional relationship to change periodically, and Steps S1 and S2 are repeated until the image display is completed.

  By the way, the lenticular lens does not need to be composed of a single lens that covers the entire two-dimensional display. The lenticular lens may be provided for each of all or some of the plurality of regions obtained by dividing the two-dimensional image displayed on the two-dimensional display. For example, as shown in FIG. 13, the entire display area of the two-dimensional display 51 may be divided into a plurality of areas, and a small lenticular lens 1S may be provided for each area. In this case, it is desirable to provide a lenticular lens driving unit 52S for each lenticular lens 1S, and the relative positional relationship between the lenticular lens 1S and the corresponding two-dimensional image pixel is determined by each lenticular lens driving unit 52S. It can be controlled individually. In this case, the control by each lenticular lens driving unit 52S (that is, control for vibrating the lenticular lens 1S) does not need to be synchronized as a whole of the two-dimensional display 51. Accordingly, it is possible to control such that only a part of the two-dimensional display is three-dimensionally displayed while the other part is two-dimensionally displayed. In the example of FIG. 13, each lenticular lens 1S may be configured by a cylindrical lens having one convex shape.

It is a figure for demonstrating the principle of the multi-view system using a lenticular lens. It is a figure for demonstrating the change of the direction of the light ray by the movement of a lenticular lens. It is a figure which shows the change of a light ray when a lenticular lens is vibrated to right and left. It is a figure which shows that the convex-surface upper part of a lenticular lens becomes a pseudo flat shape. It is a figure which shows the outline | summary of a structure of a multiview presentation display apparatus. It is a figure which shows the example of 1 structure of a lenticular lens drive part. It is a figure for demonstrating the principle which vibrates a lenticular lens. It is a figure which shows embodiment which vibrates a lenticular lens with a mechanical structure. It is a figure which shows an example of the appearance of a two-dimensional image at the time of vibrating a lenticular lens. It is a figure for demonstrating embodiment which vibrates a two-dimensional image itself. It is a figure which shows the functional block structure of a multiview presentation display apparatus. It is a processing flowchart regarding the display control method. It is a figure which shows the structural example which provided the small lenticular lens with respect to each display small area | region of a two-dimensional display.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 1S ... Lenticular lens, 2A-2E ... Pixel, 50 ... Multi-viewpoint display device, 51 ... Two-dimensional display, 52, 52S ... Lenticular lens driving unit, 53 ... Base, 55 ... Position relation control unit, 56 ... Rotation Drive control unit 57 ... Image control unit 60 ... Substrate 61, 62 ... Support unit 62A, 65A, 68A ... Electric wiring 63A, 63B, 64A, 64B ... Connection unit 65, 66, 67, 68 ... Electrode Part, 81 ... disc, 82 ... spring.

Claims (5)

With a two-dimensional display,
A viewing zone control unit arranged to cover at least a part of the two-dimensional display, and distributes a two-dimensional image displayed on the two-dimensional display into a plurality of viewpoint images, and a plurality of cylindrical tubes extending in parallel to each other The viewing zone control unit configured by a lenticular lens including a lens,
The relative positional relationship between the pixels of the two-dimensional image displayed on the two-dimensional display and the viewing zone control unit in a predetermined direction is changed so that the relative positional relationship periodically changes within a predetermined range. A positional relationship control unit to control;
A multi-viewpoint display device comprising:   The multi-viewpoint display device according to claim 1, wherein the positional relationship control unit is configured to vibrate the viewing zone control unit along the predetermined direction with respect to the two-dimensional display whose position is fixed. .   The positional relationship control unit applies the two-dimensional image to the viewing zone control unit whose position is fixed so that pixels of the two-dimensional image displayed on the two-dimensional display vibrate along the predetermined direction. The multi-viewpoint display device according to claim 1, configured to display a moving image. The viewing zone control unit is provided for each region for at least some of the plurality of predetermined regions obtained by dividing the two-dimensional image displayed on the two-dimensional display,
The positional relationship control unit is configured to individually control a relative positional relationship between the viewing zone control unit provided for each region and a pixel of a corresponding two-dimensional image. The multi-viewpoint presentation display device according to any one of? 3. A viewing area control unit arranged to cover at least a part of the two-dimensional display and the two-dimensional display, and distributes the two-dimensional image displayed on the two-dimensional display into images of a plurality of viewpoints, and extends in parallel to each other. A display control method executed by a multi-viewpoint presentation display device including the viewing zone control unit configured by a lenticular lens including a plurality of existing cylindrical lenses,
Displaying a two-dimensional image on the two-dimensional display;
The relative positional relationship between the pixels of the two-dimensional image displayed on the two-dimensional display and the viewing zone controller along a predetermined direction changes periodically within a predetermined range. A step of controlling
A display control method.

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