Invention Grant
- Patent Title: Apparatus for providing waveguide displays with two-dimensional pupil expansion
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Application No.: US17655756Application Date: 2022-03-21
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Publication No.: US11754842B2Publication Date: 2023-09-12
- Inventor: Milan Momcilo Popovich , Jonathan David Waldern , Alastair John Grant
- Applicant: DigiLens Inc.
- Applicant Address: US CA Sunnyvale
- Assignee: DigiLens Inc.
- Current Assignee: DigiLens Inc.
- Current Assignee Address: US CA Sunnyvale
- Main IPC: G02B27/01
- IPC: G02B27/01 ; G02B27/00 ; G02B5/18 ; F21V8/00 ; G02F1/29

Abstract:
An optical display comprises: a first waveguide comprising a first surface and a second surface, an input coupler, a fold grating, and an output grating. The input coupler receives collimated first wavelength light from an Input Image Node causes the light to travel within the first waveguide via total internal reflection between the first surface and the second surface to the fold grating. The fold grating provides pupil expansion in a first direction directs the light to the output grating via total internal reflection between the first surface and the second surface. The output grating provides pupil expansion in a second direction different than the first direction and causes the light to exit the first waveguide from the first surface or the second surface. At least one of the input coupler, fold grating and output grating is a rolled k-vector grating, and the fold grating is a dual interaction grating.
Public/Granted literature
- US20220260838A1 Apparatus for Providing Waveguide Displays with Two-Dimensional Pupil Expansion Public/Granted day:2022-08-18
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