Invention Grant
- Patent Title: Artificial reality systems including digital and analog control of pixel intensity
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Application No.: US17067070Application Date: 2020-10-09
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Publication No.: US11567325B2Publication Date: 2023-01-31
- Inventor: Ilias Pappas , William Thomas Blank , Ramakrishna Chilukuri , Michael Yee
- 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: Shumaker & Sieffert, P.A.
- Main IPC: G02B27/01
- IPC: G02B27/01 ; G06T7/90 ; G06T19/00

Abstract:
Electronic display devices include digital and analog control of pixel intensity. A digital pixel control circuit and an analog pixel control circuit are provided within each pixel. The digital pixel control circuit employs digital PWM techniques to control a number of subframes within each frame during which a driving current is supplied to a light emitting element within the pixel. The analog pixel control circuit controls the level of the driving current supplied to the light emitting element within the pixel during the frame. In one example, the digital pixel control circuit and the analog pixel control circuit may together control pixel intensity with the analog pixel control circuit providing additional in-pixel bits for increased color depth. Alternatively, the digital pixel control circuit may control pixel intensity and the analog pixel control circuit may control non-uniformity compensation.
Public/Granted literature
- US20220113542A1 ARTIFICIAL REALITY SYSTEMS INCLUDING DIGITAL AND ANALOG CONTROL OF PIXEL INTENSITY Public/Granted day:2022-04-14
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