Naked eye 3D laser display device

Abstract

The invention discloses a naked eye 3D laser display device. The naked eye 3D laser display device comprises a directional projection screen, a laser light source, a red single-color laser light source, a green single-color laser light source and a blue single-color laser light source. Light rays emitted by the three single-color laser light sources at specific angles and specific positions are incident on the directional projection screen provided with nano grating pixels, the same outgoing light fields are formed, the laser light source provides multi-view-angle image pixels, the multi-view-angle image pixels match a nano grating pixel array on the directional projection screen, and, through direct space modulation for laser projection light, colorful 3D display is achieved; and crosstalk does not exist between various view point, and the naked eye 3D laser display device has the advantage that people has no watching visual fatigue, and has the advantage of low cost.

Description

technical field [0001] The invention relates to the field of laser display, in particular to a laser display device capable of realizing naked-eye 3D. Background technique [0002] The principle of parallax has been discovered for more than 100 years. Although domestic and foreign companies continue to display prototypes of naked-eye 3D display, due to the constraints of low image resolution and easy visual fatigue, naked-eye 3D display based on the principle of parallax has been Failed to really enter the field of consumer electronics. Parallax principles include the visual barrier method, microcylindrical lens method and directional backlight. The visual barrier screen or the micro-cylindrical lens plate covers the surface of the liquid crystal display LCD, and separates the images of different viewing angles in space. In terms of optical principles, due to the diffusion of light sources, images at different angles in space are not unique. Therefore, when human eyes obse...

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Problems solved by technology

Chinese patent CN201410187534.X proposes a naked-eye 3D backlight module, which uses one or more groups of LED sequential light sources combined with convex lenses, polygonal prisms, and parallax barriers to achieve multi-view 3D display. It is difficult to realize on the surface, and it is easy to generate crosstalk of light. Therefore, based on the proposed directional backlight solution, no samples or products of actual glasses-free 3D display devices have been seen.

The waveguide structures used in the above patents are all hexagonal or triangular, which is difficult to combine with today’s mainstream display methods, especially difficult to apply to rectangular display methods like smartphones, which will not be conducive to industrial large-scale Production

[0007] In the patent WO2014 / 051624A1, Hewlett-Packard discloses the use of integrated hybrid laser waveguide array directional backlight to realize multi-view display, uses waveguide array to couple red, green and blue light, and realizes directional export of light through pixel type grating. Although the method can realize color 3D display, the resolution of the obtained image is greatly reduced due to the use of multi-waveguide arrays, and at the same time, the precision of the manufacturing process of the directional backlight structure is very high.

[0008] Laser display scans red, green, and blue light spots on the screen to form an image. It has the characteristics of wide color gamut, high brightness, and large format. It may become an important way to realize large-scale display in the future. However, currently There is no solution for glasses-free 3D display based on lasers

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