Color optical waveguide structure and display device

Abstract

The invention discloses a color optical waveguide structure and a display device, and the structure comprises an optical waveguide which comprises a coupling-in region and a coupling-out region; the coupling-in region comprises a coupling-in grating structure and a coupling-out grating structure; the coupled-in grating structure and the coupled-out grating structure corresponding to each color arecontrolled; when the coupling-in grating structure and the coupling-out grating structure corresponding to one color are in a diffraction mode, the coupling-in grating structure and the coupling-outgrating structure are in a diffraction mode; the coupled-in grating structure and the coupled-out grating structure corresponding to other colors are in a transmission mode. Therefore, only the optical waveguides corresponding to the coupled-in grating structure and the coupled-out grating structure in the diffraction mode transmit light of corresponding colors. The optical waveguides corresponding to the coupled-in grating structure and the coupled-out grating structure in the transmission mode do not transmit light of corresponding colors, so that it is guaranteed that light of only one color is emitted in each time period, the chromatic dispersion phenomenon of the grating is relieved, and optical waveguide chromatic aberration-free color display can be achieved.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a color light waveguide structure and a display device. Background technique [0002] Augmented Reality (AR, Augmented Reality) is a technology that uses virtual objects or information to augment real scenes, and is widely used in scientific research, military, industry, games, video, education and other fields. Near-eye AR display has attracted a lot of attention for its extremely high immersion. As a light and thin near-eye display device, optical waveguide near-eye display device is a mainstream solution for realizing near-eye AR display. [0003] In the related technology, a micro image display is used as the image source, and the image is projected to the optical waveguide coupling element coupled into the waveguide structure with the optical system, and after a certain distance is transmitted in the waveguide, it is projected to the human eye through the coupling element t...

AI Technical Summary

Problems solved by technology

The diffractive optical waveguide device uses a grating as the in-coupling and out-coupling element of the optical waveguide. Compared with the geometric optical waveguide using a free-form surface or film array, it is thinner and easier to mass-produce. However, it is difficult to control the grating to respond to only one color and to other The color does not respond at all, and there will be a phenomenon of dispersion. This characteristic of the grating determines that it is difficult to achieve a color display without chromatic aberration

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