A display system based on waveguide

Abstract

The invention discloses a display system based on a waveguide, which includes an image segmentation unit, an optical fiber scanning module and a waveguide. The image segmentation unit is used to divide an image to be displayed into more than two sub-images; the waveguide is two sets of stacked waveguides, The first group of waveguides is provided with an in-coupling grating whose angular bandwidth is less than a preset angle; the optical fiber scanning module includes at least one scanner, each scanner is fixed with two sets of scanning optical fibers, and the outgoing light of the first group of scanning optical fibers is less than The angle of the angular bandwidth of the first group of waveguides enters the waveguide, and the outgoing light of the second group of scanning fibers enters the waveguide at an angle larger than the angular bandwidth of the first group of waveguides; the grating has almost no diffraction / reflection effect on the incident light exceeding its angular bandwidth. This feature enables the optical fiber scanning module to include multiple scanning optical fibers and can be integrated into one module, which can not only improve the field of view, resolution, and refresh rate, but also facilitate the miniaturization of near-eye display devices.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a waveguide-based display system. Background technique [0002] Most of the existing near-eye display modules used in the field of augmented reality (Augmented Reality, AR) have the problem of small field of view. Take the waveguide-based display module in the prior art as an example: the existing waveguide-based display The modules generally include an image source 1, an eyepiece system 2, an in-coupling grating 3, a waveguide 4 and an out-coupling grating 5, such as figure 1 shown. After the light beam emitted by the image source 1 is collimated by the eyepiece system 2, it is coupled into the waveguide 4 at a certain angle through the coupling grating 3 for total reflection transmission, and the coupling grating 5 set in the waveguide corresponding to the exit pupil position transmits the The light beam is coupled out to the human eye. Since the grating is very sensitive t...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a display system based on waveguide to solve the problems of small field of view and inability to miniaturize existing near-eye display technology

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