Invention Grant
- Patent Title: Switchable Pancharatnam-Berry phase grating stack
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Application No.: US16735425Application Date: 2020-01-06
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Publication No.: US11668932B2Publication Date: 2023-06-06
- Inventor: Lu Lu , Gang Li , Seungjae Lee , Mengfei Wang
- Applicant: META PLATFORMS TECHNOLOGIES, LLC
- Applicant Address: US CA Menlo Park
- Assignee: META PLATFORMS TECHNOLOGIES, LLC
- Current Assignee: META PLATFORMS TECHNOLOGIES, LLC
- Current Assignee Address: US CA Menlo Park
- Agency: Artegis Law Group, LLP
- Main IPC: G02B27/00
- IPC: G02B27/00 ; G02B5/18 ; G02B26/08 ; G02B27/42 ; G02F1/01

Abstract:
Various embodiments set forth a foveated display system and components thereof. The foveated display system includes a peripheral display module disposed in series with a foveal display module. The peripheral display module is configured to generate low-resolution, large field of view imagery for a user's peripheral vision. The foveal display module is configured to perform foveated rendering in which high-resolution imagery is focused towards a foveal region of the user's eye gaze. The peripheral display module may include a diffuser that is disposed within a pancake lens, which is a relatively compact design. The foveal display module may include a Pancharatnam-Berry Phase grating stack that increases the steering range of a beam-steering device such that a virtual image can be steered to cover an entire field of view visible to the user's eye.
Public/Granted literature
- US20210208389A1 SWITCHABLE PANCHARATNAM-BERRY PHASE GRATING STACK Public/Granted day:2021-07-08
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