Diffraction waveguide structure and near-to-eye display device
By using a piezoelectric layer in the diffraction waveguide structure of the AR device periodically changes the period of the relay grating, the problem of low resolution of the existing AR device is solved, and higher image resolution and better display effect are achieved.
CN119689627APending Publication Date: 2025-03-25BEIJING OPTIX LTD
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Patent Information
- Application Number
- CN202411979192.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2025-03-25
AI Technical Summary
Technical Problem
The resolution of existing AR devices is low, and due to the size of the micro-optical machine, it affects the viewing effect of customers.
Method used
By introducing a piezoelectric layer into the diffraction waveguide structure, the period of the relay grating is periodically changed, so that the light emitted by the pixel units on the display device can be displayed at different locations, thereby improving the resolution of the image.
Benefits of technology
The continuous picture is realized, the resolution and display effect of the displayed image are improved, and the problem of low resolution in the prior art is overcome.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention provides a diffraction waveguide structure and a near-to-eye display device. The diffraction waveguide structure comprises a waveguide, a coupling-in grating arranged on the waveguide, and a coupling-out grating arranged on the waveguide. The diffraction waveguide structure further comprises a relay grating located between the coupling-in grating and the coupling-out grating. The piezoelectric layer is used for periodically changing the period of the relay grating; wherein the period of changing the period of the relay grating by the piezoelectric layer is less than the time of visual delay of human eyes. According to the technical scheme, the period of the relay grating is periodically changed by adopting the piezoelectric layer, so that light rays emitted by the pixel units on the display device can be displayed at different positions of pupils of a user, and the period of the relay grating period is changed to be smaller than the visual delay time of people, so that continuous pictures are displayed, and the user experience is improved. The resolution of the display image is improved, and the display effect is improved.
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