Grating-based three-dimensional display method

Abstract

The invention relates to the technical field of three-dimensional image display, and specifically relates to a grating-based three-dimensional display method. The method can realize monocular multi-view presentation by increasing the viewpoint distribution density of an area where an observer is located, thereby improving the three-dimensional visual comfort level. According to the method, relevant parameters of a grating are changed according to the spatial position of the eyes of an observer, light passing through the whole or partial areas of adjacent visual areas enters the left pupil of the observer, and light passing through the whole or partial areas of other adjacent visual areas enters the right pupil of the observer. The respective corresponding visual areas of the two pupils ofthe observer are spatially separated from each other by means of other methods of projecting different images to the left eye and the right eye of the observer, or by means of the design of the arrangement direction of grating units.

Description

technical field [0001] The present invention relates to the technical field of three-dimensional image display, and more specifically, to a grating-based three-dimensional display method. Background technique [0002] In the real three-dimensional world, two-dimensional display is not perfect due to the loss of depth information on the third dimension. Therefore, the three-dimensional display technology for presenting three-dimensional scenes has received more and more attention. The grating-type 3D display technology is compatible with the characteristics of mainstream flat-panel displays, making it the most widely used 3D technology. Through the light-splitting function of the grating, the traditional grating-type 3D display technology guides the outgoing light beams of different groups of pixels on the display screen to be visible in different viewing areas, so that the binocular eyes of observers near the corresponding viewpoints of different viewing areas can receive li...

AI Technical Summary

Problems solved by technology

Limited by the space bandwidth product of the display screen, the number of viewing areas and corresponding viewpoints that can be presented by the grating display technology is limited; at the same time, in order to ensure that both eyes of the observer can receive the corresponding optical information, the limited number of viewing areas requires Covers both eyes of the observer, resulting in a large spacing between adjacent viewing zones, which means that each eye of the observer can only receive a 2D view

In order to clearly see a corresponding two-dimensional view, the observer's binocular eyes must focus on the display screen presenting the two-dimensional view. When obtaining three-dimensional vision based on the principle of binocular parallax, the angle between the binocular viewing direction is relative to the displayed space. The resulting focus-convergence conflict of the three-dimensional light point will cause the observer's dizziness and various visual discomforts

[0003] In the existing grating-based 3D display technology, the long direction of the grating unit and the direction of the observer's binocular line are placed at a large angle, and the limited resolution of the display screen results in a very limited number of viewing areas. If the length of the grating unit is consistent, the distribution area of ​​the viewing area along the binocular connection direction needs to cover the binocular requirements of the observer, resulting in a relatively large distance between adjacent viewing areas along the binocular connection direction, so that it is impossible to achieve single-eye multi-view (including two views), and each eye can only receive a 3D display method corresponding to a 2D view, there is a problem of inconsistency between the focus distance and the convergence distance, which is one of the important sources of visual discomfort when viewing 3D images

At the same time, various existing non-grating 3D display technologies, such as helmet-mounted virtual / augmented reality technology using two displays, 3D technology using polarized glasses or shutter glasses, also use two equivalent screens on the display surface. (For example, in a helmet-mounted virtual / augmented reality system, the two equivalent screens are the virtual images of two monitors, and in a polarized glasses-type 3D system, the two equivalent screens are the projections of two projectors on the screen.) Swipe the eyes of the observer to present a corresponding Two-dimensional view to achieve three-dimensional presentation, there is also the problem of inconsistent focus distance and convergence distance

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