Patents by Inventor Yi-Chen Liu

Yi-Chen 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).

  • Patent number: 8379041
    Abstract: For improving the drawback of brightness decay of a display due to aging, a memory can be used to store the usage time of each pixel of the display, then based upon the usage time the brightness decay of each pixel of the display can be compensated and accordingly the value for the compensation can be stored in a volatile memory and a non-volatile memory. However, the usage of the non-volatile memory is limited. Hence, the present invention discloses a new approach for storing the data so as to decrease write-in sequence per unit area for the non-volatile memory rather than increasing its storing capacity proportionally.
    Type: Grant
    Filed: December 16, 2009
    Date of Patent: February 19, 2013
    Assignee: Holtek Semiconductor Inc.
    Inventors: Tzong-Kwei Chen, Chun-Lin Shen, Yi-Chen Liu, Chen-Ting Kuan
  • Publication number: 20110074834
    Abstract: For improving the brightness decay of a display due to its aging, a non-volatile memory such as Flash can be used to store a brightness accumulation value of each point of the display, and each point can be compensated for its brightness accordingly. However, the non-volatile memory suffers from incorrect write-in data or temporary power disconnection, and thus the error will exist all the time to make the display non-even. Hence, the present invention uses a multiple data backups and CRC error detection, plus new/old data comparison to protect data the non-volatile memory from incorrect brightness compensation value so as to uniform the brightness of the display.
    Type: Application
    Filed: December 16, 2009
    Publication date: March 31, 2011
    Applicant: HOLTEK SEMICONDUCTOR INC.
    Inventors: Tzong-Kwei Chen, Chun-Lin Shen, Yi-Chen Liu, Chen-Ting Kuan
  • Publication number: 20110074806
    Abstract: For improving the drawback of brightness decay of a display due to aging, a memory can be used to store the usage time of each pixel of the display, then based upon the usage time the brightness decay of each pixel of the display can be compensated and accordingly the value for the compensation can be stored in a volatile memory and a non-volatile memory. However, the usage of the non-volatile memory is limited. Hence, the present invention discloses a new approach for storing the data so as to decrease write-in sequence per unit area for the non-volatile memory rather than increasing its storing capacity proportionally.
    Type: Application
    Filed: December 16, 2009
    Publication date: March 31, 2011
    Applicant: HOLTEK SEMICONDUCTOR INC.
    Inventors: Tzong-Kwei Chen, Chun-Lin Shen, Yi-Chen Liu, Chen-Ting Kuan
  • Publication number: 20100136579
    Abstract: Identification of urokinase-type plasminogen, matrix metalloproteinase 9, and ?-2-microglobulin as novel biomarkers associated with liver fibrosis and uses thereof in diagnosing liver fibrosis.
    Type: Application
    Filed: December 1, 2009
    Publication date: June 3, 2010
    Applicant: Industrial Technology Research Institute
    Inventors: Tzu-Ling Tseng, Hung-Yi Li, Yen-Peng Li, Angelina Huai-Lo Lee, Yi-Chen Liu, Ping-Fu Cheng, Wei-Ya Lin, Hong-Zen Yeh
  • Publication number: 20070165428
    Abstract: A digital pulse width modulation (DPWM) controlling system for controlling a load of an application circuit with a DPWM unit is provided, which comprises a comparator and a micro-control unit, the comparator receiving a sense signal detected from the load and a reference signal and comparing the sense signal and the reference signal to output an analog comparison signal, and the micro-control unit generating a trigger signal having a minimum pulse width and receiving the analog comparison signal to output a DPWM signal, wherein the micro-control unit adjusts the minimum pulse width of the trigger signal to obtain a pulse width of the DPWM signal in response to the analog comparison signal whenever the sense signal is within a stable duration so as to output the DPWM signal to the application circuit to control the load.
    Type: Application
    Filed: March 8, 2006
    Publication date: July 19, 2007
    Applicant: Holtek Semiconductor Inc.
    Inventors: Yi-Chan Lin, Yueh-Mei Hou, Chien-Feng Lai, Yi-Chen Liu