Waveguide-based display module and display equipment

Abstract

The invention discloses a waveguide-based display module and display equipment. An image generation unit modulates a mixed light beam comprising at least two groups of sub-images with different wavelengths based on a wavelength division multiplexing principle; the mixed light beam modulated by the image generating unit is coupled into the waveguide module, the waveguide module is provided with a plurality of layers of coupling-in units and a plurality of layers of coupling-out units, each layer of coupling-in unit is designed to couple light with different wavelength ranges, and emergent images of to-be-displayed image mixed light beams generated by the image generation unit after being coupled out by the coupling-out units of the waveguide module are spliced into the to-be-displayed image. According to the invention, a brand-new idea is used to solve the problem of considering both large field of view and miniaturization of the near-to-eye display module.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a waveguide-based display module and display device. Background technique [0002] Most of the existing near-eye display modules used in the augmented reality (Augmented Reality, AR) field have a 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 sensitiv...

AI Technical Summary

Problems solved by technology

[0003] In the Chinese patent CN107024769, we can see that the existing technology has thought of using the splicing method to expand the field of view. This splicing method needs to add a set of corresponding input light source modules for each additional splicing of a group of field of view angles. It is a hardware-stacked splicing scheme, which prevents the size of the near-eye display module from being miniaturized

Images