Invention Grant
- Patent Title: Polarization-based processing of unpolarized image light
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Application No.: US16730293Application Date: 2019-12-30
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Publication No.: US11686942B2Publication Date: 2023-06-27
- Inventor: Yang Zhao , Afsoon Jamali , Junren Wang , Wai Sze Tiffany Lam , Lu Lu , Douglas Robert Lanman
- 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: Pequignot + Myers
- Agent Matthew A. Pequignot
- Main IPC: G02F1/137
- IPC: G02F1/137 ; G02B27/01 ; G03B13/36

Abstract:
A display system includes a source of unpolarized image light, and a stack of polarization-selective optical elements operable to switchably convert the unpolarized image light into two orthogonally polarized light beams, each of which being switchable in at least one beam characteristic. An output polarizer selects one of the two orthogonally polarized light beams for providing to a user. A depolarizer may be disposed between an electronic display emitting polarized light and the stack. The depolarizer may be in the form of an LC bilayer with randomized in-plane optic axis.
Public/Granted literature
- US20210080720A1 POLARIZATION-BASED PROCESSING OF UNPOLARIZED IMAGE LIGHT Public/Granted day:2021-03-18
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