Patents by Inventor Han-Chi Liu

Han-Chi Liu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20230421924
    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.
    Type: Application
    Filed: September 11, 2023
    Publication date: December 28, 2023
    Inventors: REN-CHIEH LIU, CHIH-HUAN WU, YI-HSIEN KO, HAN-CHI LIU
  • Publication number: 20230386258
    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.
    Type: Application
    Filed: August 15, 2023
    Publication date: November 30, 2023
    Inventors: Ren-Chieh LIU, Yi-Hsien KO, Han-Chi LIU
  • Patent number: 11792550
    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.
    Type: Grant
    Filed: November 29, 2022
    Date of Patent: October 17, 2023
    Assignee: PixArt Imaging Inc.
    Inventors: Ren-Chieh Liu, Chih-Huan Wu, Yi-Hsien Ko, Han-Chi Liu
  • Patent number: 11783633
    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.
    Type: Grant
    Filed: May 28, 2021
    Date of Patent: October 10, 2023
    Assignee: PIXART IMAGING INC.
    Inventors: Ren-Chieh Liu, Yi-Hsien Ko, Han-Chi Liu
  • Publication number: 20230275089
    Abstract: There is provided a logic circuit capable of preventing latch-up. The conducting of a parasitic SCR is prevented by doping an additional N+ active region in the N well region of a PMOS transistor and doping an additional P+ active region in the P well region of an NMOS transistor so as to prevent the occurrence of latch-up.
    Type: Application
    Filed: May 5, 2023
    Publication date: August 31, 2023
    Inventors: Yung-Ju WEN, Han-Chi LIU, Hsin-You KO
  • Patent number: 11688739
    Abstract: There is provided a logic circuit capable of preventing latch-up. The conducting of a parasitic SCR is prevented by doping an additional N+ active region in the N well region of a PMOS transistor and doping an additional P+ active region in the P well region of an NMOS transistor so as to prevent the occurrence of latch-up.
    Type: Grant
    Filed: March 19, 2021
    Date of Patent: June 27, 2023
    Assignee: PIXART IMAGING INC.
    Inventors: Yung-Ju Wen, Han-Chi Liu, Hsin-You Ko
  • Publication number: 20230106895
    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.
    Type: Application
    Filed: November 29, 2022
    Publication date: April 6, 2023
    Inventors: REN-CHIEH LIU, CHIH-HUAN WU, YI-HSIEN KO, HAN-CHI LIU
  • Patent number: 11614359
    Abstract: There is provided a circuit to improve the sensing efficiency of pixels that uses the induction effect of a capacitor to duplicate a voltage deviation caused by additional electrons and uses a circuit to cancel out the voltage deviation during reading pixel data thereby improving the sensing efficiency.
    Type: Grant
    Filed: September 14, 2021
    Date of Patent: March 28, 2023
    Assignee: PIXART IMAGING INC.
    Inventors: Kuan Tang, Yi-Cheng Chiu, Chia-Chi Kuo, Jui-Te Chiu, Han-Chi Liu
  • Patent number: 11592330
    Abstract: There is provided a circuit to improve the sensing efficiency of pixels that uses the induction effect of a capacitor to duplicate a voltage deviation caused by additional electrons and uses a circuit to cancel out the voltage deviation during reading pixel data thereby improving the sensing efficiency.
    Type: Grant
    Filed: September 14, 2021
    Date of Patent: February 28, 2023
    Assignee: PIXART IMAGING INC.
    Inventors: Kuan Tang, Yi-Cheng Chiu, Chia-Chi Kuo, Jui-Te Chiu, Han-Chi Liu
  • Patent number: 11592331
    Abstract: There is provided a circuit to improve the sensing efficiency of pixels that uses the induction effect of a capacitor to duplicate a voltage deviation caused by additional electrons and uses a circuit to cancel out the voltage deviation during reading pixel data thereby improving the sensing efficiency.
    Type: Grant
    Filed: September 14, 2021
    Date of Patent: February 28, 2023
    Assignee: PIXART IMAGING INC.
    Inventors: Kuan Tang, Yi-Cheng Chiu, Chia-Chi Kuo, Jui-Te Chiu, Han-Chi Liu
  • Patent number: 11546540
    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.
    Type: Grant
    Filed: February 15, 2022
    Date of Patent: January 3, 2023
    Assignee: PIXART IMAGING INC.
    Inventors: Ren-Chieh Liu, Chih-Huan Wu, Yi-Hsien Ko, Han-Chi Liu
  • Publication number: 20220302112
    Abstract: There is provided a logic circuit capable of preventing latch-up. The conducting of a parasitic SCR is prevented by doping an additional N+ active region in the N well region of a PMOS transistor and doping an additional P+ active region in the P well region of an NMOS transistor so as to prevent the occurrence of latch-up.
    Type: Application
    Filed: March 19, 2021
    Publication date: September 22, 2022
    Inventors: Yung-Ju WEN, Han-Chi LIU, Hsin-You KO
  • Publication number: 20220174236
    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.
    Type: Application
    Filed: February 15, 2022
    Publication date: June 2, 2022
    Inventors: REN-CHIEH LIU, CHIH-HUAN WU, YI-HSIEN KO, HAN-CHI LIU
  • Patent number: 11287316
    Abstract: There is provided a circuit to improve the sensing efficiency of pixels that uses the induction effect of a capacitor to duplicate a voltage deviation caused by additional electrons and uses a circuit to cancel out the voltage deviation during reading pixel data thereby improving the sensing efficiency.
    Type: Grant
    Filed: May 13, 2019
    Date of Patent: March 29, 2022
    Assignee: PIXART IMAGING INC.
    Inventors: Kuan Tang, Yi-Cheng Chiu, Chia-Chi Kuo, Jui-Te Chiu, Han-Chi Liu
  • Patent number: 11290671
    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.
    Type: Grant
    Filed: September 1, 2020
    Date of Patent: March 29, 2022
    Assignee: PIXART IMAGING INC.
    Inventors: Ren-Chieh Liu, Chih-Huan Wu, Yi-Hsien Ko, Han-Chi Liu
  • Publication number: 20220070404
    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.
    Type: Application
    Filed: September 1, 2020
    Publication date: March 3, 2022
    Inventors: Ren-Chieh LIU, Chih-Huan WU, Yi-Hsien KO, Han-Chi LIU
  • Publication number: 20220058410
    Abstract: There is provided a neural signal detection circuit capable of outputting time difference data or neural data, and including a first temporal circuit and a second temporal circuit. The first temporal circuit is used to store detected voltage energy of a first interval and a second interval as the time difference data. The second temporal circuit is used to store detected voltage energy of the second interval as the neural data. The neural signal detection circuit is used to output the time difference data or the neural data in different operating modes.
    Type: Application
    Filed: November 2, 2021
    Publication date: February 24, 2022
    Inventors: SEN-HUANG HUANG, REN-CHIEH LIU, YI-HSIEN KO, HAN-CHI LIU, YI-CHENG CHIU
  • Publication number: 20210404871
    Abstract: There is provided a circuit to improve the sensing efficiency of pixels that uses the induction effect of a capacitor to duplicate a voltage deviation caused by additional electrons and uses a circuit to cancel out the voltage deviation during reading pixel data thereby improving the sensing efficiency.
    Type: Application
    Filed: September 14, 2021
    Publication date: December 30, 2021
    Inventors: KUAN TANG, YI-CHENG CHIU, CHIA-CHI KUO, JUI-TE CHIU, HAN-CHI LIU
  • Publication number: 20210404870
    Abstract: There is provided a circuit to improve the sensing efficiency of pixels that uses the induction effect of a capacitor to duplicate a voltage deviation caused by additional electrons and uses a circuit to cancel out the voltage deviation during reading pixel data thereby improving the sensing efficiency.
    Type: Application
    Filed: September 14, 2021
    Publication date: December 30, 2021
    Inventors: Kuan TANG, Yi-Cheng CHIU, Chia-Chi KUO, Jui-Te CHIU, Han-Chi LIU
  • Publication number: 20210404872
    Abstract: There is provided a circuit to improve the sensing efficiency of pixels that uses the induction effect of a capacitor to duplicate a voltage deviation caused by additional electrons and uses a circuit to cancel out the voltage deviation during reading pixel data thereby improving the sensing efficiency.
    Type: Application
    Filed: September 14, 2021
    Publication date: December 30, 2021
    Inventors: KUAN TANG, YI-CHENG CHIU, CHIA-CHI KUO, JUI-TE CHIU, HAN-CHI LIU