A color light waveguide structure and display device

Abstract

The invention discloses a color light waveguide structure and a display device. The color light waveguide structure includes: an optical waveguide, the light waveguide includes an in-coupling area and an out-coupling area; the in-coupling area includes an in-coupling grating structure and an out-coupling The grating structure is controlled by controlling the in-coupling grating structure and the out-coupling grating structure corresponding to each color, so that when the in-coupling grating structure and the out-coupling grating structure corresponding to one color are in the diffraction mode, the other colors correspond to The in-coupling grating structure and the out-coupling grating structure are in the transmission mode, so that only the optical waveguides corresponding to the in-coupling grating structure and the out-coupling grating structure in the diffraction mode transmit light of the corresponding color, and the in-coupling grating structures in the transmission mode The optical waveguide corresponding to the grating structure and the outcoupling grating structure does not transmit the light of the corresponding color, so that only one color of light is emitted in each period, which alleviates the dispersion phenomenon of the grating, and is conducive to realizing the color display of the optical waveguide without chromatic aberration.

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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