公开(公告)号：US11567325B2

公开(公告)日：2023-01-31

申请号：US17067070

申请日：2020-10-09

Applicant: Meta Platforms Technologies, LLC

Inventor： Ilias Pappas ,  William Thomas Blank ,  Ramakrishna Chilukuri ,  Michael Yee

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.

公开(公告)号：US20240313771A1

公开(公告)日：2024-09-19

申请号：US18184936

申请日：2023-03-16

Applicant: Meta Platforms Technologies, LLC

Inventor： Umanath Ramachandra Kamath ,  Daniel Villamizar ,  Yair Shachna Shemesh ,  Robert Wiser ,  Ramakrishna Chilukuri

IPC: H03K17/687

CPC classification number: H03K17/6872

Abstract: In one embodiment, an electrical circuit module may include a bootstrap capacitor connected to a bootstrap-capacitor charging switch. A first signal channel may include a first sampling switch and a first control switch that controls a first connection between the bootstrap capacitor and a first control input of the first sampling switch. A second signal channel may include a second sampling switch and a second control switch that controls a second connection between the bootstrap capacitor and a second control input of the second sampling switch. The bootstrap capacitor may be charged during a first operation phase during which the bootstrap-capacitor charging switch is turned on. The first control switch of the first signal channel may be turned on during a first sub-phase of a second operation phase, and the second control switch of the second signal channel is turned on during a second sub-phase of the second operation phase.

公开(公告)号：US20230161165A1

公开(公告)日：2023-05-25

申请号：US18157901

申请日：2023-01-23

Applicant: Meta Platforms Technologies, LLC

Inventor： Ilias Pappas ,  William Thomas Blank ,  Ramakrishna Chilukuri ,  Michael Yee

IPC: G02B27/01 ,  G06T7/90 ,  G06T19/00

CPC classification number: G02B27/0172 ,  G06T7/90 ,  G06T19/006

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.