公开(公告)号：US11796386B2

公开(公告)日：2023-10-24

申请号：US17362548

申请日：2021-06-29

Applicant: STMicroelectronics (Research and Development) Limited ,  STMicroelectronics (Grenoble 2) SAS

Inventor： Jeffrey M. Raynor ,  Sophie Taupin ,  Jean-Jacques Rouger ,  Pascal Mellot

IPC: G01J1/42 ,  G01J1/44 ,  H01L23/58 ,  H01L27/144 ,  H01L31/02

CPC classification number: G01J1/4204 ,  G01J1/44 ,  H01L23/585 ,  H01L27/1443 ,  H01L27/1446 ,  H01L31/02019 ,  G01J2001/446 ,  G01J2001/448

Abstract: An optical sensor includes pixels. Each pixel has a photodetector. A readout circuit performs a process over an exposure time where the photodetector is connected to a reverse bias voltage supply to reset a voltage across the photodetector, and the photodetector is disconnected from the reverse bias voltage supply until that the voltage across the photodetector decreases in response to received ambient light. An ambient light level is then determine an based on a number of times the voltage across the photodetector is reset over the exposure time.

公开(公告)号：US11852528B2

公开(公告)日：2023-12-26

申请号：US17102522

申请日：2020-11-24

Applicant: STMicroelectronics (Grenoble 2) SAS

Inventor： Mickael Guene ,  Salim Bouchene ,  Cedric Grospellier ,  Jean-Jacques Rouger ,  Pascal Mellot

IPC: G01J1/44

CPC classification number: G01J1/44

Abstract: The present disclosure relates to a device and method for measuring a flicker frequency of a light source configured to implement at least one phase lock loop.

公开(公告)号：US20210164832A1

公开(公告)日：2021-06-03

申请号：US17102522

申请日：2020-11-24

Applicant: STMicroelectronics (Grenoble 2) SAS

Inventor： Mickael Guene ,  Salim Bouchene ,  Cedric Grospellier ,  Jean-Jacques Rouger ,  Pascal Mellot

IPC: G01J1/44

Abstract: The present disclosure relates to a device and method for measuring a flicker frequency of a light source configured to implement at least one phase lock loop.

公开(公告)号：US11079270B2

公开(公告)日：2021-08-03

申请号：US16740676

申请日：2020-01-13

Applicant: STMicroelectronics (Research & Development) Limited ,  STMicroelectronics (Grenoble 2) SAS

Inventor： Jeffrey M. Raynor ,  Sophie Taupin ,  Jean-Jacques Rouger ,  Pascal Mellot

IPC: H01L27/146 ,  G01J1/42 ,  G01J1/44 ,  H01L23/58 ,  H01L27/144 ,  H01L31/02

Abstract: An optical sensor includes pixels. Each pixel has a photodetector and a semiconductor guard ring around the photodetector. The photodetector and the semiconductor guard ring are dimensioned so that a fill factor of the pixel is less than or equal to 50%.

公开(公告)号：US20190101442A1

公开(公告)日：2019-04-04

申请号：US16151118

申请日：2018-10-03

Applicant: STMicroelectronics (Grenoble 2) SAS ,  STMicroelectronics (Alps) SAS

Inventor： Pascal Mellot ,  Jean-Jacques Rouger

IPC: G01J1/42 ,  G01J1/44 ,  G06F1/06

Abstract: A method of detecting ambient luminous radiation includes resetting and triggering a counter each time a photodiode illuminated by the ambient luminous radiation reaches a discharge threshold. The counter is then being clocked by a clock signal having a first frequency and delivering a counter output signal. The method further includes generating an AC signal representative of the ambient luminous radiation by converting, from digital to analog, a digital signal obtained from the counter output signal.

公开(公告)号：US11994425B2

公开(公告)日：2024-05-28

申请号：US18370637

申请日：2023-09-20

Applicant: STMicroelectronics (Research & Development) Limited ,  STMicroelectronics (Grenoble 2) SAS

Inventor： Jeffrey M. Raynor ,  Sophie Taupin ,  Jean-Jacques Rouger ,  Pascal Mellot

IPC: G01J1/42 ,  G01J1/44 ,  H01L23/58 ,  H01L27/144 ,  H01L31/02

CPC classification number: G01J1/4204 ,  G01J1/44 ,  H01L23/585 ,  H01L27/1443 ,  H01L27/1446 ,  H01L31/02019 ,  G01J2001/446 ,  G01J2001/448

Abstract: An optical sensor includes pixels. Each pixel has a photodetector. A readout circuit performs a process over an exposure time where the photodetector is connected to a reverse bias voltage supply to reset a voltage across the photodetector, and the photodetector is disconnected from the reverse bias voltage supply until that the voltage across the photodetector decreases in response to received ambient light. An ambient light level is then determine an based on a number of times the voltage across the photodetector is reset over the exposure time.