Invention Grant
- Patent Title: Liquid crystal cells for polarization rotation
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Application No.: US15969007Application Date: 2018-05-02
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Publication No.: US10678057B2Publication Date: 2020-06-09
- Inventor: Lu Lu , Fenglin Peng , Mengfei Wang , Wai Sze Tiffany Lam , Scott Charles McEldowney
- Applicant: Facebook Technologies, LLC
- Applicant Address: US CA Menlo Park
- Assignee: Facebook Technologies, LLC
- Current Assignee: Facebook Technologies, LLC
- Current Assignee Address: US CA Menlo Park
- Agency: Millburn IP PLLC
- Main IPC: G02F1/1347
- IPC: G02F1/1347 ; G02F1/13363 ; G02B27/01 ; G02F1/1343 ; G02B5/30 ; G02B27/00 ; G02C7/10 ; G02F1/133 ; G02F1/139 ; G02F1/1333

Abstract:
An optical element comprising a stacked liquid crystal (LC) structure for rotating polarization (e.g., handedness) of an incident circularly polarized light over a broad wavelength and incident angle for head-mounted displays (HMD)s display application is proposed. The stacked LC structure has a dual cell structures, which includes at least a first LC cell and a second LC cell, and the stacked LC structure rotates the polarized light for a broad band of light (e.g., visible spectrum) over a given field a view. The performance of designed dual LC cells structures may be optimized for narrow band wavelength and a narrow incident angle for different application cases.
Public/Granted literature
- US20180335630A1 LIQUID CRYSTAL CELLS FOR POLARIZATION ROTATION Public/Granted day:2018-11-22
Information query
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