Patents by Inventor Po-Hsuan CHANG

Po-Hsuan CHANG 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).

  • System and method for controlling excess bias of single photon avalanche photo diode
    Patent number: 9823123
    Abstract: A system for controlling excess bias of a single photon avalanche photo diode (SPAD) is provided. The system includes a power supply, a SPAD, a control circuit and a load. The power supply generates a supply voltage. The SPAD has a first terminal receiving the supply voltage and a second terminal generating an output voltage signal. The control circuit is connected to the second terminal of the SPAD. The load has a first terminal connected to the second terminal of the SPAD, and a second terminal connected to the control circuit for receiving a reset level. The control circuit is capable of monitoring a swing of the output voltage level and generating the reset level in response to the excess bias level and the swing of the output voltage level.
    Type: Grant
    Filed: June 29, 2015
    Date of Patent: November 21, 2017
    Assignee: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE
    Inventors: Chia-Ming Tsai, Po-Hsuan Chang, Ming-Ching Kuo, Tzu-Yi Yang
  • SYSTEM AND METHOD FOR CONTROLLING EXCESS BIAS OF SINGLE PHOTON AVALANCHE PHOTO DIODE
    Publication number: 20160223397
    Abstract: A system for controlling excess bias of a single photon avalanche photo diode (SPAD) is provided. The system includes a power supply, a SPAD, a control circuit and a load. The power supply generates a supply voltage. The SPAD has a first terminal receiving the supply voltage and a second terminal generating an output voltage signal. The control circuit is connected to the second terminal of the SPAD. The load has a first terminal connected to the second terminal of the SPAD, and a second terminal connected to the control circuit for receiving a reset level. The control circuit is capable of monitoring a swing of the output voltage level and generating the reset level in response to the excess bias level and the swing of the output voltage level.
    Type: Application
    Filed: June 29, 2015
    Publication date: August 4, 2016
    Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE
    Inventors: Chia-Ming TSAI, Po-Hsuan CHANG, Ming-Ching KUO, Tzu-Yi YANG
  • Display screen or portion thereof with graphical user interface
    Patent number: D872113
    Type: Grant
    Filed: March 19, 2018
    Date of Patent: January 7, 2020
    Assignee: HTC Corporation
    Inventors: Ping-Chun Hsieh, Po-Hsuan Chang, Ka Wai Aidan Leung, Tong-Mu Chiang