公开(公告)号：US20210064159A1

公开(公告)日：2021-03-04

申请号：US17028775

申请日：2020-09-22

Applicant: Apple Inc

Inventor： Mohammad Yeke Yazdandoost ,  Lun Tsai ,  Meng-Huan Ho ,  Niva A. Ran ,  Akshay Bhat ,  Volodymyr Borshch ,  Anand K. Chamakura ,  Giovanni Gozzini

IPC: G06F3/042 ,  H01L27/28 ,  H01L31/153 ,  H01L31/173 ,  H01L25/16 ,  H01L27/32 ,  H01L51/52 ,  G09G3/3225 ,  G06K9/00

Abstract: Systems and methods for detection of incident light are described. An optical imaging sensor is positioned at least partially within an active display area of a display and is configured to detect and characterize one or more properties of light incident to the active display area of the display.

公开(公告)号：US20250067595A1

公开(公告)日：2025-02-27

申请号：US18613515

申请日：2024-03-22

Applicant: Apple Inc.

Inventor： Anand K. Chamakura ,  Stephen N. Sweet ,  Ali Motamed ,  Dong Zheng ,  Jianjun Guo ,  Chau H. Nguyen

IPC: G01J1/46 ,  G01J1/42 ,  G01J1/44

Abstract: An electronic device may have a sensor to measure ambient flicker. The sensor may be a sigma-delta converter. The flicker may be calculated based on the voltage output of the sigma-delta converter and the number of times the sigma-delta converter is triggered during a predetermined period, thereby reducing the voltage output. In particular, a fast Fourier transform (FFT) may be used on these values to determine the flicker. If desired, filtering and/or non-uniform sampling may be incorporated to avoid aliasing. Additionally or alternatively, a Lomb-Scargle spectral analysis may be used to prevent the attenuation of the measured flicker signals. As an alternative to using a sigma-delta converter to determine ambient flicker, a folding capacitive transimpedance amplifier (C-TIA) circuit or a circuit with an analog to digital converter and digital filter may be used to measure the ambient flicker.

公开(公告)号：US20200319731A1

公开(公告)日：2020-10-08

申请号：US16376987

申请日：2019-04-05

Applicant: Apple Inc.

Inventor： Mohammad Yeke Yazdandoost ,  Lun Tsai ,  Meng-Huan Ho ,  Niva A. Ran ,  Akshay Bhat ,  Volodymyr Borshch ,  Anand K. Chamakura ,  Giovanni Gozzini

IPC: G06F3/042 ,  H01L25/16 ,  H01L27/28 ,  H01L31/153 ,  H01L31/173 ,  H01L27/32 ,  H01L51/52 ,  G09G3/3225 ,  G06K9/00

Abstract: Systems and methods for detection of incident light are described. An optical imaging sensor is positioned at least partially within an active display area of a display and is configured to detect and characterize one or more properties of light incident to the active display area of the display.

公开(公告)号：US11422661B2

公开(公告)日：2022-08-23

申请号：US17028775

申请日：2020-09-22

Applicant: Apple Inc.

Inventor： Mohammad Yeke Yazdandoost ,  Lun Tsai ,  Meng-Huan Ho ,  Niva A. Ran ,  Akshay Bhat ,  Volodymyr Borshch ,  Anand K. Chamakura ,  Giovanni Gozzini

IPC: G09G3/3225 ,  G06V40/13 ,  G06F3/042 ,  H01L27/28 ,  H01L31/153 ,  H01L31/173 ,  H01L25/16 ,  H01L27/32 ,  H01L51/52

Abstract: Systems and methods for detection of incident light are described. An optical imaging sensor is positioned at least partially within an active display area of a display and is configured to detect and characterize one or more properties of light incident to the active display area of the display.

公开(公告)号：US10984732B2

公开(公告)日：2021-04-20

申请号：US16580150

申请日：2019-09-24

Applicant: Apple Inc.

Inventor： Dong Zheng ,  Ali Motamed ,  Anand K. Chamakura

IPC: G09G3/36 ,  G09G3/34 ,  H03F3/45

Abstract: An electronic device may have a display with an array of pixels configured to display images for a user. The electronic device may have an ambient light sensor for gathering ambient light information. The ambient light sensor may be at least partially covered by the display. The ambient light sensor may be switched into use during blanking periods when a portion of the display overlapping with the display is temporarily turned off. The ambient light sensor may include a photodetector, a first stage with an amplifier, first and second capacitors selectively coupled across the amplifier, and a second accumulation stage. During blanking time, the first capacitor may integrate photodetector current. During non-blanking, the charge stored in the first capacitor may be transferred to the second accumulation stage while the second capacitor applies an offset voltage to the photodetector to prevent undesired charge injection into the photodetector.

公开(公告)号：US20210090509A1

公开(公告)日：2021-03-25

申请号：US16580150

申请日：2019-09-24

Applicant: Apple Inc.

Inventor： Dong Zheng ,  Ali Motamed ,  Anand K. Chamakura

IPC: G09G3/34 ,  H03F3/45

Abstract: An electronic device may have a display with an array of pixels configured to display images for a user. The electronic device may have an ambient light sensor for gathering ambient light information. The ambient light sensor may be at least partially covered by the display. The ambient light sensor may be switched into use during blanking periods when a portion of the display overlapping with the display is temporarily turned off. The ambient light sensor may include a photodetector, a first stage with an amplifier, first and second capacitors selectively coupled across the amplifier, and a second accumulation stage. During blanking time, the first capacitor may integrate photodetector current. During non-blanking, the charge stored in the first capacitor may be transferred to the second accumulation stage while the second capacitor applies an offset voltage to the photodetector to prevent undesired charge injection into the photodetector.