Invention Grant
- Patent Title: Directional illuminator and display device with pupil steering by tiltable reflector
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Application No.: US17374888Application Date: 2021-07-13
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Publication No.: US11852836B2Publication Date: 2023-12-26
- Inventor: Jacques Gollier , Fenglin Peng , Ying Geng , Anqi Ji
- 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: G02B27/01
- IPC: G02B27/01 ; G02B26/08 ; G02B27/00 ; G02B27/28

Abstract:
A directional illuminator includes a light source, a pupil-replicating lightguide, and a tiltable reflector coupling the light source to the pupil-replicating lightguide. The exit beam angle of the light outputted by the pupil-replicating lightguide follows the in-coupling angle, and accordingly depends on the tilting angle of the tiltable reflector. The directional illuminator with steered light beam may be used to illuminate a display panel. Steering the illuminating light by the tiltable reflector enables one to steer the exit pupil of the display device to match the user's eye location(s).
Public/Granted literature
- US20230014577A1 DIRECTIONAL ILLUMINATOR AND DISPLAY DEVICE WITH PUPIL STEERING BY TILTABLE REFLECTOR Public/Granted day:2023-01-19
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