公开(公告)号：US12298181B2

公开(公告)日：2025-05-13

申请号：US18411987

申请日：2024-01-12

Applicant: Apple Inc.

Inventor： Mahesh B Chappalli ,  Ionut A Mirel ,  Yan Guan ,  Akshay Bhat

IPC: G01J1/44 ,  G01J1/42 ,  G09G3/32

Abstract: To mitigate undesirable outcomes due to crosstalk in an ambient light sensor reading resulting from light emission from an electronic display, statistics may be gathered to determine and compensate for the crosstalk. For example, the ambient light sensor may detect ambient light levels while the electronic display is temporarily paused to reduce or eliminate crosstalk between the light produced by the electronic display and the ambient light sensor. However, the ambient light sensor may retain charge from a previous light emission, creating back-emission crosstalk. The ratio of back-emission to front-emission (e.g., present light emission) may not be linear, and the degree of nonlinearity may vary with pixel value, color component, display brightness, temperature, and so on. As the ambient light sensor is affected by back-emission, compensation for the nonlinearity between the front-emission and the back-emission may be obtained to estimate the crosstalk induced on the ambient light sensor.

公开(公告)号：US12243465B2

公开(公告)日：2025-03-04

申请号：US18296934

申请日：2023-04-06

Applicant: Apple Inc.

Inventor： Sunmin Jang ,  Mahdi Farrokh Baroughi ,  Saif Choudhary ,  Hopil Bae ,  Gautam Agrawal ,  Ionut A Mirel ,  Hari P Paudel ,  Haitao Li ,  Wei H Yao ,  Mahesh B Chappalli ,  Young Don Bae

IPC: G09G3/20 ,  G09G3/32

Abstract: To reduce image artifacts and non-uniformity associated with a display pixel of an electronic display, processing circuity may adjust a luminance value corresponding to a display pixel according to a per-pixel gain mask, a per-pixel anode mask, or both. To further correct for the non-uniformity, the processing circuitry may convert the luminance value to a digital code based on a curve associated with an anode on which the display pixel is located.

公开(公告)号：US20250109985A1

公开(公告)日：2025-04-03

申请号：US18537783

申请日：2023-12-12

Applicant: Apple Inc.

Inventor： Ionut A Mirel ,  Mahesh B Chappalli ,  Maximillian C Bruggeman

IPC: G01J1/44 ,  G01J1/42

Abstract: An electronic display includes an ambient light sensor (ALS) located beneath an active area to sense ambient light above the active area. The ALS is synchronized with blanking periods of a display pixel on the active area. An emission-off scale factor is calculated based on an emission profile of the display pixel when the display pixel is turned off. The emission-off scale factor is used with display content to calculate a crosstalk compensation for the ALS.

公开(公告)号：US20230368718A1

公开(公告)日：2023-11-16

申请号：US18296934

申请日：2023-04-06

Applicant: Apple Inc.

Inventor： Sunmin Jang ,  Mahdi Farrokh Baroughi ,  Saif Choudhary ,  Hopil Bae ,  Gautam Agrawal ,  Ionut A Mirel ,  Hari P Paudel ,  Haitao Li ,  Wei H Yao ,  Mahesh B Chappalli

IPC: G09G3/20 ,  G09G3/32

CPC classification number: G09G3/2007 ,  G09G3/32 ,  G09G2300/0426 ,  G09G2320/0626 ,  G09G2360/16 ,  G09G2320/02 ,  G09G2310/0264 ,  G09G2310/08

Abstract: To reduce image artifacts and non-uniformity associated with a display pixel of an electronic display, processing circuity may adjust a luminance value corresponding to a display pixel according to a per-pixel gain mask, a per-pixel anode mask, or both. To further correct for the non-uniformity, the processing circuitry may convert the luminance value to a digital code based on a curve associated with an anode on which the display pixel is located.