公开(公告)号：US11546540B2

公开(公告)日：2023-01-03

申请号：US17672028

申请日：2022-02-15

Applicant: PixArt Imaging Inc.

Inventor： Ren-Chieh Liu ,  Chih-Huan Wu ,  Yi-Hsien Ko ,  Han-Chi Liu

IPC: H04N5/3745 ,  H01L27/146 ,  H04N5/355 ,  H04N5/374

Abstract: There is provided a pixel circuit for performing analog operation including a photodiode, a first temporal circuit, a second temporal circuit and an operation circuit. Within a first interval, the photodiode detects first light energy to be stored in the first temporal circuit. Within a second interval, the photodiode detects second light energy to be stored in the second temporal circuit. Within an operation interval, the first temporal circuit outputs a first detection signal having a first pulse width according to the first light energy and outputs a second detection signal having a second pulse width according to the second light energy for being calculated by the operation circuit.

公开(公告)号：US11212484B2

公开(公告)日：2021-12-28

申请号：US16924285

申请日：2020-07-09

Applicant: PixArt Imaging Inc.

Inventor： Chih-Huan Wu ,  Wen-Cheng Yen

IPC: H04N5/77 ,  G11B27/34 ,  H04N9/80 ,  H04N5/235

Abstract: There is provided a photographing device having two output interfaces that respectively used to output a first image frame and a second image frame. The first image frame is provided to a processor of the photographing device to perform the feature extraction and tag the second image frame accordingly. The tagged second image frame is for the image recording of an external back end.

公开(公告)号：US20210344881A1

公开(公告)日：2021-11-04

申请号：US17376127

申请日：2021-07-14

Applicant: PixArt Imaging Inc.

Inventor： Chih-Huan Wu ,  Wen-Han Yao

IPC: H04N7/18 ,  G08B13/196 ,  G06T7/246

Abstract: A method of an image sensor circuit includes: providing an event camera comprising at least one pixel unit; using the event camera to sense at least one current pixel value of the at least one pixel unit to detect whether at least one pixel value changes; when the at least one pixel value changes, using the event camera to trigger the digital processing circuit when the digital processing circuit is in a power saving mode and transmit information of the at least one pixel value to the digital processing circuit.

公开(公告)号：US12207024B2

公开(公告)日：2025-01-21

申请号：US18111610

申请日：2023-02-20

Applicant: PixArt Imaging Inc.

Inventor： Chih-Huan Wu ,  Wen-Han Yao

IPC: H04N7/18 ,  G06T7/246 ,  G08B13/196

Abstract: A method of an image sensor circuit includes: providing an event camera comprising at least one pixel unit; using the event camera to sense at least one current pixel value of the at least one pixel unit to detect whether at least one pixel value changes; when the at least one pixel value changes, using the event camera to trigger the digital processing circuit when the digital processing circuit is in a power saving mode and transmit information of the at least one pixel value to the digital processing circuit.

公开(公告)号：US12058467B2

公开(公告)日：2024-08-06

申请号：US18244296

申请日：2023-09-11

Applicant: PixArt Imaging Inc.

Inventor： Ren-Chieh Liu ,  Chih-Huan Wu ,  Yi-Hsien Ko ,  Han-Chi Liu

IPC: H04N25/772 ,  H01L27/146

CPC classification number: H04N25/772 ,  H01L27/14643

Abstract: There is provided a pixel circuit for performing analog operation including a photodiode, a first temporal circuit, a second temporal circuit and an operation circuit. Within a first interval, the photodiode detects first light energy to be stored in the first temporal circuit. Within a second interval, the photodiode detects second light energy to be stored in the second temporal circuit. Within an operation interval, the first temporal circuit outputs a first detection signal having a first pulse width according to the first light energy and outputs a second detection signal having a second pulse width according to the second light energy for being calculated by the operation circuit.

公开(公告)号：US12047687B2

公开(公告)日：2024-07-23

申请号：US17889366

申请日：2022-08-16

Applicant: PixArt Imaging Inc.

Inventor： Chih-Huan Wu

IPC: H04N23/745 ,  H04N23/73 ,  H04N23/743 ,  H04N25/583 ,  H04N25/75

CPC classification number: H04N23/745 ,  H04N23/73 ,  H04N23/743 ,  H04N25/583 ,  H04N25/75

Abstract: An optical sensor, for sensing a sensing frame corresponding to a flicker period of ambient light, comprising: a pixel array, configured to perform N times of exposure operations via at least one pixel of the pixel array in N exposure time intervals to generate N sub-frames, wherein a summation of the N exposure time intervals equals to a sensing interval and the sensing interval is less than or identical to a first flicker period. The optical sensor adds the N sub-frames to generate a summing sub-frame. The sensing frame comprises the summing sub-frame. The adding operation can also be performed to digital signals generated from the sub-frames. The influences caused by the fluctuation of ambient light can be neutralized, since the frame or portion of the frame is sensed at least twice at different phases of a single flicked period. By this way, the conventional flicker issue can be improved.

公开(公告)号：US11743025B1

公开(公告)日：2023-08-29

申请号：US17695803

申请日：2022-03-15

Applicant: PixArt Imaging Inc.

Inventor： Chih-Huan Wu ,  Wen-Han Yao ,  Ren-Hau Gu

IPC: H04L7/00 ,  H04L67/12 ,  H04L67/141

CPC classification number: H04L7/0075 ,  H04L67/12 ,  H04L67/141

Abstract: A method of an optical sensor device includes: using an oscillator circuit to generate a clock signal; and generating monitoring frames according to the clock signal; wherein the clock signal is calibrated in response to at least one of: a first communication signal, transmitted for multiple times from a monitoring system externally coupled to the optical sensor device, is received by the optical sensor device; a data length of the first communication signal transmitted for only one time from the monitoring system externally coupled to the optical sensor device; and, a data length of an encoded data portion of the first communication signal transmitted for only one time.

公开(公告)号：US20230209021A1

公开(公告)日：2023-06-29

申请号：US18111610

申请日：2023-02-20

Applicant: PixArt Imaging Inc.

Inventor： Chih-Huan Wu ,  Wen-Han Yao

IPC: H04N7/18 ,  G08B13/196 ,  G06T7/246

CPC classification number: H04N7/188 ,  G08B13/19604 ,  G06T7/248 ,  H04N7/183 ,  G06T2207/30232

Abstract: A method of an image sensor circuit includes: providing an event camera comprising at least one pixel unit; using the event camera to sense at least one current pixel value of the at least one pixel unit to detect whether at least one pixel value changes; when the at least one pixel value changes, using the event camera to trigger the digital processing circuit when the digital processing circuit is in a power saving mode and transmit information of the at least one pixel value to the digital processing circuit.

公开(公告)号：US11533449B2

公开(公告)日：2022-12-20

申请号：US17515575

申请日：2021-11-01

Applicant: PixArt Imaging Inc.

Inventor： Chih-Huan Wu ,  Wen-Cheng Yen

IPC: H04N5/77 ,  G11B27/34 ,  H04N5/235

Abstract: There is provided a photographing device having two output interfaces that respectively used to output a first image frame and a second image frame. The first image frame is provided to a processor of the photographing device to perform the feature extraction and tag the second image frame accordingly. The tagged second image frame is for the image recording of an external back end.

公开(公告)号：US20240340541A1

公开(公告)日：2024-10-10

申请号：US18741763

申请日：2024-06-12

Applicant: PixArt Imaging Inc.

Inventor： Chih-Huan Wu

IPC: H04N23/745 ,  H04N23/73 ,  H04N23/743 ,  H04N25/583 ,  H04N25/75

CPC classification number: H04N23/745 ,  H04N23/73 ,  H04N23/743 ,  H04N25/583 ,  H04N25/75

Abstract: An optical sensor, for sensing a sensing frame corresponding to a flicker period of ambient light, comprising: a pixel array, configured to perform N times of exposure operations via at least one pixel of the pixel array in N exposure time intervals to generate N sub-frames, wherein a summation of the N exposure time intervals equals to a sensing interval and the sensing interval is less than or identical to a first flicker period. The optical sensor adds the N sub-frames to generate a summing sub-frame. The sensing frame comprises the summing sub-frame. The adding operation can also be performed to digital signals generated from the sub-frames. The influences caused by the fluctuation of ambient light can be neutralized, since the frame or portion of the frame is sensed at least twice at different phases of a single flicked period. By this way, the conventional flicker issue can be improved.