Waveguide display system

Abstract

The invention provides a waveguide display system and method. The system comprises: an image source used for generating an imaging light beam; a relay collimation system used for collimating the imaging light beam into first parallel light with the same angle; a coupling input device used for coupling the first parallel light into the following waveguide to form second parallel light; the waveguide used for propagating the second parallel light to the following coupling output device in a total reflection manner; the coupling output device used for diffracting the second parallel light into convergent light, leaving the waveguide and entering the first polarization grating; the first polarization grating used for dividing the convergent light into two beams of circularly polarized light which are emitted at different angles and have opposite rotation directions; and a second first polarization grating, wherein the two beams of circularly polarized light with opposite rotation directions are diffracted by the second polarization grating to form two beams of imaging light beams which are transversely staggered and enter the eyes. According to the invention, the system is simple in structure, the exit pupil diameter is increased while retinal display is achieved, and an external real scene can be watched.

Description

technical field [0001] The invention belongs to the technical field of retinal projection display, and in particular relates to a waveguide display system and method. Background technique [0002] The goal of augmented reality technology is to superimpose computer-generated virtual images, scenes or system prompt information on the display technology of real scenes. This technology can apply virtual information to the real world, and effectively improve the user's perception and interaction experience of the real world through the information provided by the computer system, so it has received great attention from researchers. However, for a common head-mounted display system, there is a problem that the distance between the virtual display image and the actual scene does not match, that is, there is a contradiction between convergence and focus. Retinal projection display technology does not need to go through the focal length adjustment of the eye lens, and directly proje...

AI Technical Summary

Problems solved by technology

[0003] However, in retinal projection display technology, the display light passing through the pupil of the human eye converges to one point, so this type of display technology has the problem of small exit pupil diameter.

In order to expand the exit pupil diameter of the retinal projection display system, the human eye tracking system can be used to detect the position of the pupil of the human eye, and then project the converging point of the projection light to the pupil position, but this will increase the complexity and cost of the system, and the response speed Slower; there are also related technologies that use multiple light engines to modulate multiple exit pupils, and the optical fusion device splices the generated multiple exit pupils to increase the exit pupil range, but this will also increase the cost and power of the system. consumption

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