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：US11330206B2

公开(公告)日：2022-05-10

申请号：US16814931

申请日：2020-03-10

Applicant: PixArt Imaging Inc.

Inventor： Yen-Min Chang ,  Ren-Chieh Liu

IPC: H04N5/355 ,  H04N5/353 ,  H04N5/378

Abstract: An image sensing circuit includes floating node, switch circuit, capacitor(s), and counting circuit. The floating node receives image electric charge from a photosensitive pixel. The switch circuit is coupled between floating node and capacitor(s) to dynamically connect and disconnect floating node and capacitor(s). The capacitor(s) include(s) first terminal(s) connected to switch circuit and second terminal(s) connected to ground. The counting circuit counts the number of charging and discharging behavior of capacitor(s) according to dynamic switches of switch circuit wherein the switch circuit dynamically switches to make capacitor(s) be charged and discharged dynamically in response to one exposure time period to receive energy of image electric charge which is determined by the number of charging and discharging behavior of the capacitor(s) and the capacitor(s)' potential value measured finally.

公开(公告)号：US11290671B2

公开(公告)日：2022-03-29

申请号：US17009417

申请日：2020-09-01

Applicant: PixArt Imaging Inc.

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

IPC: H04N5/3745 ,  H01L27/146

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：US20200213544A1

公开(公告)日：2020-07-02

申请号：US16814931

申请日：2020-03-10

Applicant: PixArt Imaging Inc.

Inventor： Yen-Min Chang ,  Ren-Chieh Liu

IPC: H04N5/355 ,  H04N5/378 ,  H04N5/353

Abstract: An image sensing circuit includes floating node, switch circuit, capacitor(s), and counting circuit. The floating node receives image electric charge from a photosensitive pixel. The switch circuit is coupled between floating node and capacitor(s) to dynamically connect and disconnect floating node and capacitor(s). The capacitor(s) include(s) first terminal(s) connected to switch circuit and second terminal(s) connected to ground. The counting circuit counts the number of charging and discharging behavior of capacitor(s) according to dynamic switches of switch circuit wherein the switch circuit dynamically switches to make capacitor(s) be charged and discharged dynamically in response to one exposure time period to receive energy of image electric charge which is determined by the number of charging and discharging behavior of the capacitor(s) and the capacitor(s)' potential value measured finally.

公开(公告)号：US12192655B2

公开(公告)日：2025-01-07

申请号：US18503265

申请日：2023-11-07

Applicant: PIXART IMAGING INC. ,  TAIWAN SPACE AGENCY

Inventor： Ren-Chieh Liu ,  Chao-Chi Lee ,  Yi-Yuan Chen ,  En-Feng Hsu

IPC: H04N25/768 ,  H04N25/531 ,  H04N25/75

Abstract: The present disclosure provides a time delay integration (TDI) sensor using a rolling shutter. The TDI sensor includes multiple pixel columns. Each pixel column includes multiple pixels arranged in an along-track direction, wherein two adjacent pixels or two adjacent pixel groups in every pixel column have a separation space therebetween. The separation space is equal to a pixel height multiplied by a time ratio of a line time difference of the rolling shutter and a frame period, or equal to a summation of at least one pixel height and a multiplication of the pixel height by the time ratio of the line time difference and the frame period. The TDI sensor further records defect pixels of a pixel array such that in integrating pixel data to integrators, the pixel data associated with the defect pixels is not integrated into corresponding integrators.

公开(公告)号：US11849236B2

公开(公告)日：2023-12-19

申请号：US17849711

申请日：2022-06-27

Applicant: PIXART IMAGING INC. ,  TAIWAN SPACE AGENCY

Inventor： Ren-Chieh Liu ,  Chao-Chi Lee ,  Yi-Yuan Chen ,  En-Feng Hsu

IPC: H04N25/768 ,  H04N25/75 ,  H04N25/531

CPC classification number: H04N25/768 ,  H04N25/531 ,  H04N25/75

Abstract: The present disclosure provides a time delay integration (TDI) sensor using a rolling shutter. The TDI sensor includes multiple pixel columns. Each pixel column includes multiple pixels arranged in an along-track direction, wherein two adjacent pixels or two adjacent pixel groups in every pixel column have a separation space therebetween. The separation space is equal to a pixel height multiplied by a time ratio of a line time difference of the rolling shutter and a frame period, or equal to a summation of at least one pixel height and a multiplication of the pixel height by the time ratio of the line time difference and the frame period. The TDI sensor further records defect pixels of a pixel array such that in integrating pixel data to integrators, the pixel data associated with the defect pixels is not integrated into corresponding integrators.

公开(公告)号：US11792550B2

公开(公告)日：2023-10-17

申请号：US18071477

申请日：2022-11-29

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：US11783633B2

公开(公告)日：2023-10-10

申请号：US17333022

申请日：2021-05-28

Applicant: PIXART IMAGING INC.

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

IPC: G06V40/20 ,  G06V10/94 ,  H04N25/75

CPC classification number: G06V40/20 ,  G06V10/94 ,  H04N25/75

Abstract: There is provided an optical sensor including a pixel matrix and a readout circuit. The pixel matrix includes multiple pixels arranged in a matrix, and each of the multiple pixels outputs temporal difference pixel data. The readout circuit sequentially reads the pixel matrix using a readout block, and performs the hybrid difference calculation on the temporal difference pixel data of pixels within the readout block. Accordingly, the output of the readout circuit is the data accomplishing temporal difference and spatial difference.

公开(公告)号：US11336843B2

公开(公告)日：2022-05-17

申请号：US17351235

申请日：2021-06-18

Applicant: PIXART IMAGING INC.

Inventor： Ren-Chieh Liu ,  Chao-Chi Lee ,  Wen-Cheng Yen

IPC: H04N5/353 ,  H04N5/3745

Abstract: The present disclosure provides a time delay integration (TDI) sensor using a rolling shutter. The TDI sensor includes multiple pixel columns. Each pixel column includes multiple pixels arranged in an along-track direction, wherein two adjacent pixels or two adjacent pixel groups in every pixel column have a separation space therebetween. The separation space is equal to a pixel height multiplied by a time ratio of a line time difference of the rolling shutter and a frame period, or equal to a summation of at least one pixel height and a multiplication of the pixel height by a time ratio of the line time difference and the frame period. The line time difference of the TDI sensor is changeable without changing the separation space.

公开(公告)号：US11055548B1

公开(公告)日：2021-07-06

申请号：US16893936

申请日：2020-06-05

Applicant: PixArt Imaging Inc.

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

IPC: H04N5/228 ,  G06K9/00 ,  H04N5/378 ,  G06K9/20

Abstract: There is provided an optical sensor including a pixel matrix and a readout circuit. The pixel matrix includes multiple pixels arranged in a matrix, and each of the multiple pixels outputs temporal difference pixel data. The readout circuit sequentially reads the pixel matrix using a readout block, and performs the hybrid difference calculation on the temporal difference pixel data of pixels within the readout block. Accordingly, the output of the readout circuit is the data accomplishing temporal difference and spatial difference.