Patents by Inventor Tung-Hsien Tsai

Tung-Hsien Tsai 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: 20240305306
    Abstract: A phase rotation control method includes: detecting whether a phase of an output clock signal of a phase interpolator is going to be switched from a current quadrant to a next quadrant according to a trigger signal to generate a state signal; determining a phase adjustment direction of the output clock signal according to an original phase control signal and the state signal to generate a update signal and first control signals; generating the trigger signal and a selection signal according to the update signal and generating second control signals according to the state signal and the first control signals; and when the phase of the output clock signal is switched to the next quadrant, outputting the second control signal as a phase control signal according to the selection signal, in which the phase interpolator adjusts the phase of the output clock signal according to the phase control signal.
    Type: Application
    Filed: February 22, 2024
    Publication date: September 12, 2024
    Inventors: YAO-CHIA LIU, TUNG-HSIEN TSAI
  • Patent number: 11735105
    Abstract: A driving circuit, a driving method and a display apparatus are provided. The driving method is provided for driving a light-emitting unit including a first light-emitting element series and a second light-emitting element series connected in parallel and connected to a processing unit and a driving unit of a driving circuit. The processing unit detects a first voltage value and a second voltage value. The driving unit detects and transmits a first current value and a second current value to the processing unit. The processing unit determines and compares a first power value and a second power value. When the first and second power values are different, the processing unit controls the driving unit to adjust a driving current setting of the light-emitting element series until the first and second power values are equal. The invention ensures luminance consistency of different light-emitting element series and the luminance uniformity of display apparatus.
    Type: Grant
    Filed: May 26, 2022
    Date of Patent: August 22, 2023
    Assignee: Qisda Corporation
    Inventors: Po-Wen Wang, Tung-Hsien Tsai, Wen-Hao Kuo, Chin-Sheng Chueh
  • Publication number: 20230230529
    Abstract: A driving circuit, a driving method and a display apparatus are provided. The driving method is provided for driving a light-emitting unit including a first light-emitting element series and a second light-emitting element series connected in parallel and connected to a processing unit and a driving unit of a driving circuit. The processing unit detects a first voltage value and a second voltage value. The driving unit detects and transmits a first current value and a second current value to the processing unit. The processing unit determines and compares a first power value and a second power value. When the first and second power values are different, the processing unit controls the driving unit to adjust a driving current setting of the light-emitting element series until the first and second power values are equal. The invention ensures luminance consistency of different light-emitting element series and the luminance uniformity of display apparatus.
    Type: Application
    Filed: May 26, 2022
    Publication date: July 20, 2023
    Applicant: Qisda Corporation
    Inventors: Po-Wen WANG, Tung-Hsien TSAI, Wen-Hao KUO, Chin-Sheng CHUEH
  • Patent number: 11218027
    Abstract: A light-emitting wireless charging structure includes a base, a wireless charging module, a light-emitting element and an upper cover. The wireless charging module is disposed on the base. The light-emitting element is disposed on the base adjacent to the wireless charging module. The upper cover covers the wireless charging module and the light-emitting element. The upper cover has a lower surface facing the wireless charging module and an upper surface opposite to the bottom surface. When the light-emitting element emits light, light coming from the light-emitting element passes through the upper cover and forms a mark on the upper surface to indicate the position of the wireless charging module. When the light-emitting element is turn off or kept in an off state, either the mark that has been formed on the upper surface disappears therefrom or no any mark is ever shown on the top surface.
    Type: Grant
    Filed: November 28, 2019
    Date of Patent: January 4, 2022
    Assignee: Qisda Corporation
    Inventors: Yung-Yeh Chang, Ting-Hui Chih, Chen-Yang Hu, Jui-Chien Lu, Hung-Wu Lin, Wen-Hung Li, Yu-Fu Fan, Che-Wei Shen, Tung-Hsien Tsai, Yen-Chen Chiang
  • Publication number: 20200177030
    Abstract: A light-emitting wireless charging structure includes a base, a wireless charging module, a light-emitting element and an upper cover. The wireless charging module is disposed on the base. The light-emitting element is disposed on the base adjacent to the wireless charging module. The upper cover covers the wireless charging module and the light-emitting element. The upper cover has a lower surface facing the wireless charging module and an upper surface opposite to the bottom surface. When the light-emitting element emits light, light coming from the light-emitting element passes through the upper cover and forms a mark on the upper surface to indicate the position of the wireless charging module. When the light-emitting element is turn off or kept in an off state, either the mark that has been formed on the upper surface disappears therefrom or no any mark is ever shown on the top surface.
    Type: Application
    Filed: November 28, 2019
    Publication date: June 4, 2020
    Applicant: Qisda Corporation
    Inventors: Yung-Yeh CHANG, Ting-Hui CHIH, Chen-Yang HU, Jui-Chien LU, Hung-Wu LIN, Wen-Hung LI, Yu-Fu FAN, Che-Wei SHEN, Tung-Hsien TSAI, Yen-Chen CHIANG
  • Patent number: 9742298
    Abstract: A transformer includes a first switch, a first winding, a second winding, a third winding, a first current direction control unit, a second current direction control unit and a loading capacitor. The first switch is coupled between the second winding and the third winding. The first winding is disposed at a primary side and coupled between an input voltage terminal and a first ground. The second winding is disposed at a secondary side and coupled between a second ground and the first switch. The third winding is disposed at the secondary side. The first current direction control unit is coupled between the second winding and an output voltage terminal. The second current direction control unit is coupled between the third winding and the output voltage terminal. The first switch is turned on for adjusting a winding ratio when the transformer is used to output a high voltage.
    Type: Grant
    Filed: August 3, 2015
    Date of Patent: August 22, 2017
    Assignees: Qisda (Suzhou) Co., LTD., Qisda Corporation
    Inventors: Chin-Sheng Chueh, Yen-Chien Chen, Tung-Hsien Tsai, Po-Wen Wang
  • Publication number: 20160049875
    Abstract: A transformer includes a first switch, a first winding, a second winding, a third winding, a first current direction control unit, a second current direction control unit and a loading capacitor. The first switch is coupled between the second winding and the third winding. The first winding is disposed at a primary side and coupled between an input voltage terminal and a first ground. The second winding is disposed at a secondary side and coupled between a second ground and the first switch. The third winding is disposed at the secondary side. The first current direction control unit is coupled between the second winding and an output voltage terminal. The second current direction control unit is coupled between the third winding and the output voltage terminal. The first switch is turned on for adjusting a winding ratio when the transformer is used to output a high voltage.
    Type: Application
    Filed: August 3, 2015
    Publication date: February 18, 2016
    Inventors: Chin-Sheng Chueh, Yen-Chien Chen, Tung-Hsien Tsai, Po-Wen Wang