Waveguide-based display module, image generation modules and application thereof

Abstract

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

Description

technical field [0001] The invention relates to the field of display technology, in particular to an optical fiber scanning module, a flat display screen, a MEMS scanning module, a waveguide-based display module and a 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 ...

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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

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