Naked eye 3D (three-dimensional) projection screen and naked eye 3D projection system

A projection screen, 3D technology, applied in the direction of optics, instruments, projection devices, etc., can solve the problems of increasing processing, assembly process and cost

Active Publication Date: 2012-05-09
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, two sets of lens plates are required in this invention, and the structure is repeated, which increases the processing and assembly process and costs
In addition, this invention is aimed at the field of flat panel display. The light is incident from the flat panel display and passes through the grating once, which does not belong to the field of projection display.

Method used

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  • Naked eye 3D (three-dimensional) projection screen and naked eye 3D projection system
  • Naked eye 3D (three-dimensional) projection screen and naked eye 3D projection system
  • Naked eye 3D (three-dimensional) projection screen and naked eye 3D projection system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Figure 5 It is an embodiment of a naked-eye 3D front projection screen based on a surface lenticular micro-lens plate. The naked-eye 3D front projection screen is made up of a surface biconvex microcylindrical lens plate 610 and a diffuse reflection layer 620, wherein the surface biconvex microcylindrical lens plate 610 is a hyperboloid type biconvex microcylindrical lens plate, and the surface biconvex microcylindrical lens plate Both sides of the 610 are composed of multiple rows of micro-convex cylindrical lenses that are closely arranged horizontally. The number of micro-convex cylindrical lenses on both sides of the surface double-convex micro-cylindrical lens plate is equal and corresponding to each other. Each micro-convex cylindrical lens is in the shape of a vertical strip. And the pitches are equal, and the pitch is a positive integer multiple of the pixel width of the image projected by the projector onto the projection screen where the diffuse reflection la...

Embodiment 2

[0042] Figure 6 A naked-eye 3D rear projection screen of the present invention. The naked-eye 3D display screen is composed of a lenticular microcylindrical lens plate 611 on the first surface, a diffuse transmission layer 624, and a lenticular microcylindrical lens plate 612 on the second surface whose parameters are symmetrical to the lenticular microcylindrical lens plate 611 on the first surface. Both the lenticular lenticular lens plate 611 on the first surface and the lenticular lenticular lens plate 612 on the second surface are lenticular lenticular lens plates with double convex hyperboloid surfaces. The meaning that parameter is symmetrical with first surface lenticular microcylindrical lens plate 611 is: the microconvex of the first surface of second surface lenticular microcylindrical lens plate 612 and the second surface of first surface lenticular microcylindrical lens plate 611 The curvature radii of the cylindrical lenses are mutually opposite numbers, the co...

Embodiment 3

[0046] Figure 7It is an embodiment of a naked-eye 3D projection system based on a surface lenticular micro-cylindrical lens plate. The screen structure and parameters of this invention are exactly the same as those in Embodiment 1, the only difference is that four projectors are used to project parallax images. The projectors are placed in the middle of the screen and arranged symmetrically on the same horizontal line, and the distance between the projectors is the interpupillary distance of human eyes. The projector can project multiple parallax images with different parallax angles, or alternatively project two parallax images with different parallax angles if restricted by the film source. Due to the increase in the number of projectors, after screen refraction and diffusion, the light intensity of the viewing area at the observation distance is doubled compared with that of dual projectors, and the number of viewing areas with good stereoscopic effects increases. Simila...

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PUM

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Abstract

The invention discloses a naked eye 3D (three-dimensional) front-projection screen, a naked eye 3D rear-projection screen and a naked eye 3D projection system. The front-projection screen comprises a surface biconvex micro-cylindrical lens board and a diffuse reflection layer, wherein multiple rows of micro-cylindrical convex lenses are horizontally and tightly arrayed on two sides of the surfacebiconvex micro-cylindrical lens board; the micro-cylindrical convex lenses on the two sides of the surface biconvex micro-cylindrical lens board are same in quantity and are in one-to-one correspondence; the micro-cylindrical convex lenses are all in a vertical bar shape and are same in pitch; the pitches are positive integral multiples of the pixel width of an image projected onto the projectionscreen by a projector; the diffuse reflection layer is located on the rear focal plane of the surface biconvex micro-cylindrical lens board; and the principle of the rear-projection screen is as sameas that of the front-projection screen. Compared with the prior art, the screen and system provided by the invention have the beneficial effects of simple structure, easiness in processing and assembling and excellent three-dimensional display effect.

Description

technical field [0001] The present invention relates to 3D projection screen technology, in particular to a naked-eye 3D front projection screen, a naked-eye 3D rear projection screen, and a naked-eye 3D projection system using the screens. Background technique [0002] Normal people use their eyes to identify objects in three-dimensional space. When viewing an object in space, people's eyes observe from slightly different angles on the left and right sides. Due to the deviation in angle, it is reflected in the brain. "Stereoscopic vision" will be produced. The combination of two pictures will produce a three-dimensional effect, so that the relationship between the front and back of the object can be judged. The difference in the image formed by the observed object on the retina of the left and right eyes is binocular parallax. The generation of parallax plays a very important role in the formation of stereo vision. [0003] Currently, there are two mainstream methods f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/22G03B21/60G03B21/602
Inventor 苏萍马建设张波常夏飞鹏赵雪江程雪岷
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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