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公开(公告)号：US11796386B2
公开(公告)日：2023-10-24
申请号：US17362548
申请日：2021-06-29
IPC分类号： G01J1/42 , G01J1/44 , H01L23/58 , H01L27/144 , H01L31/02
CPC分类号： G01J1/4204 , G01J1/44 , H01L23/585 , H01L27/1443 , H01L27/1446 , H01L31/02019 , G01J2001/446 , G01J2001/448
摘要： 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.
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公开(公告)号：US11994424B2
公开(公告)日：2024-05-28
申请号：US17569171
申请日：2022-01-05
申请人： STMicroelectronics (Research & Development) Limited , STMicroelectronics (Grenoble 2) SAS , STMicroelectronics (Crolles 2) SAS
IPC分类号： G01J1/42 , G09G3/3225 , H04N25/53 , H05B47/105
CPC分类号： G01J1/4204 , G09G3/3225 , H04N25/53 , H05B47/105 , G09G2320/0626 , G09G2360/144
摘要： In an embodiment a method for measuring ambient light includes successively synchronizing optical signal acquisition phases with extinction phases of a disruptive light source, wherein the disruptive light source periodically provides illumination phases and the extinction phases, accumulating, in each acquisition phase, photo-generated charges by at least one photosensitive pixel comprising a pinned photodiode, wherein an area of the pinned photodiode is less than or equal to 1/10 of an area of the at least one photosensitive pixel, transferring, for each pixel, the accumulated photo-generated charges to a sensing node, converting, for each pixel, the transferred charges to a voltage at a voltage node and converting, for each pixel, the transferred charges to a digital number.
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公开(公告)号：US09565375B1
公开(公告)日：2017-02-07
申请号：US14930834
申请日：2015-11-03
IPC分类号： H01L27/148 , H04N5/353 , H04N5/378 , H01L27/146
CPC分类号： H01L27/14643 , H01L27/14603 , H01L27/1464 , H04N5/3745 , H04N5/37452
摘要： A pixel has a photodiode configured to be sensitive to light. The pixel is arranged to use back side illumination. The pixel has at least one sample and hold capacitor which is arranged on the side of the photodiode remote from a side on which light impinges. The capacitor overlies at least part of the photodiode.
摘要翻译： 像素具有被配置为对光敏感的光电二极管。 像素布置成使用背面照明。 该像素具有至少一个采样和保持电容器，其布置在光电二极管的远离光入射侧的一侧。 电容器覆盖光电二极管的至少一部分。
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公开(公告)号：US11079270B2
公开(公告)日：2021-08-03
申请号：US16740676
申请日：2020-01-13
IPC分类号： H01L27/146 , G01J1/42 , G01J1/44 , H01L23/58 , H01L27/144 , H01L31/02
摘要： 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%.
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公开(公告)号：US11994425B2
公开(公告)日：2024-05-28
申请号：US18370637
申请日：2023-09-20
IPC分类号： G01J1/42 , G01J1/44 , H01L23/58 , H01L27/144 , H01L31/02
CPC分类号： G01J1/4204 , G01J1/44 , H01L23/585 , H01L27/1443 , H01L27/1446 , H01L31/02019 , G01J2001/446 , G01J2001/448
摘要： 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.
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公开(公告)号：US20220341779A1
公开(公告)日：2022-10-27
申请号：US17660321
申请日：2022-04-22
IPC分类号： G01J1/44
摘要： The present disclosure relates to a sensor having pixels, each pixel having photodiodes having each a terminal coupled to a first node associated with the photodiode; and an amplifier having a first part and, for each photodiode, a second part associated with the photodiode. The first part includes an output of the amplifier and a first MOS transistor of a differential pair. Each second part includes a second MOS transistor of the differential pair having its gate coupled to the first node associated with the photodiode the second part is associated with; a first switch coupling a source of the second transistor to the first part of the amplifier; and a second switch coupling a drain of the second transistor to the first part of the amplifier.
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