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Three-dimensional image display device

A display device and stereoscopic image technology, applied in stereophotography, optics, lens, etc., can solve problems such as narrowing of viewing angle, darkening of displayed image, difficulty in satisfying image resolution, viewing angle, and image brightness at the same time, and achieve The effect of high resolution and large viewing angle

Inactive Publication Date: 2009-09-23
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the F value is increased, the problem of darkening the displayed image will inevitably occur
In addition, by reducing the refraction angle of light around the lens, the angle range in which stereoscopic images can be viewed well, that is, the so-called viewing angle narrows.
[0018] As mentioned above, in the conventional stereoscopic image display device, due to the problem caused by the lens, it is difficult to satisfy the resolution of the image, the viewing angle of the image, and the brightness of the image at the same time.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0046] exist figure 1 A schematic configuration of the stereoscopic image display device according to Embodiment 1 is shown in . 10 is an image display unit for synthesizing a plurality of original images with different viewpoints, 11 is a diffraction element array, and 12 is a lenticular lens array. exist figure 1 In , each element is described as being separated, but some or all of them may be in close contact, or may be separated at predetermined intervals. What is necessary is just to optimize the shape of the lenticular lens array 12 and the shape of the diffraction element array 11 according to the arrangement|positioning of each element. As shown in the figure, let the vertical axis and the horizontal axis parallel to the image display part be the Z axis and the Y axis, respectively, and let the axis perpendicular to the Z axis and the X axis be the X axis. exist figure 1 In , a plurality of vertical lines parallel to the Z-axis described on the diffraction eleme...

Embodiment 1

[0069] An acrylic lenticular lens array 12 in which a plurality of cylindrical lenticular lenses is arranged in parallel with the Z axis is used. The arrangement pitch of the lenticular lenses in the Y-axis direction is 2.54 mm (1 / 10 inch), and the focal length is 4 mm. A two-dimensional image was obtained by arranging ten CCD cameras at intervals of 24 mm in the Y-axis direction, taking in images observed from ten viewpoints, and synthesizing them. This two-dimensional image is printed with an inkjet printer to form the image display unit 10 . Then, the diffraction element array 11 and the lenticular lens array 12 are correctly arranged so that there is no positional deviation, and a stereoscopic image display device is manufactured.

[0070] Diffraction element array 11 is formed on a glass substrate 11a (material name: Sumita Optical Glass K-PSK100, d-line refractive index 1.592, Abbe number 60.5) in the shape of a blazed diffraction grating with a step d of 15 μm formed o...

Embodiment 2

[0074] A lenticular lens array 12 made of cycloolefin (ZEONEX480R manufactured by Nippon Zeon Co., Ltd.) in which a plurality of cylindrical lenticular lenses was arranged in parallel to the Z axis was used. The arrangement pitch of the lenticular lenses in the Y-axis direction is 2.54 mm (1 / 10 inch), and the focal length is 4 mm. A two-dimensional image was obtained by arranging ten CCD cameras at intervals of 24 mm in the Y-axis direction, taking in images observed from ten viewpoints, and synthesizing them. This two-dimensional image is printed with an inkjet printer to form the image display unit 10 . Then, the diffraction element array 11 and the lenticular lens array 12 are correctly arranged so that there is no positional deviation, and a stereoscopic image display device is produced.

[0075] As the material (the first material) of the base material 11a of the diffraction element array 11, use comprises the composite material (d line refractive index 1.683, Abbe's num...

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PUM

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Abstract

The present invention provides a three-dimensional image display device, which comprises a synthetic image (10) constituted by synthesizing original images from different points of view, a lens array (12), and a diffraction element array (11) having the same pitch as the lens array. The diffraction element array has a layer (11a) made of a first material and a layer (11b) made of a second material and includes a blazed diffraction grating shape with a level difference d formed at an interface between the layer made of the first material and the layer made of the second material. When the refractive index of the first material and the refractive index of the second material arerespectively represented by n1(lambda) and n2(lambda) as functions of any wavelength lambda of a visible light region, the level distance d and lambda / |n1(lambda)-n2(lambda)| are almost the same. Consequently, the color shift of an image caused by chromatic aberration is reduced, so that the high-resolution, wide view angle, and bright image can be displayed.

Description

technical field [0001] The present invention relates to a stereoscopic image display device capable of displaying high-quality images with a wide field of view. Background technique [0002] Usually, a display or a printed matter is composed of a plurality of pixels arranged on a plane, and through careful design, the viewer can recognize it as three-dimensional information (stereoscopic image), thereby improving the sense of presence and recognition accuracy. The observer recognizes the stereoscopic effect of an object at a closer place based on the difference in images seen in the right eye and the left eye. This difference in images seen by the right eye and the left eye is called stereoscopic parallax. Conventionally, various stereoscopic image display devices have been proposed that make use of this characteristic and project two images (images with stereoscopic parallax) with different viewpoints to the right eye and the left eye, respectively, so that the observer re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/22G02B3/00G02B3/06G02B5/18G02F1/13G02F1/1335G03B35/18G02B30/27
CPCG03B35/18G02B5/1885G02B27/2214G02B30/27
Inventor 是永继博
Owner PANASONIC CORP