Patents by Inventor Po-Chun Chen

Po-Chun Chen 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: 20080225556
    Abstract: The fastening apparatus utilizes a hanger and a hook disposed on the first side of a base of the fastening apparatus for hanging and fixing the fastening apparatus on a back cover of the LCD device. A groove divides the base into two parts and the outer part of the base as well as the hook is flexible relative to the inner part of the base. Two crack arresters are disposed at the end of the groove for preventing cracking of the fastening apparatus when repeated bending movement is needed while installing the fastening apparatus.
    Type: Application
    Filed: March 12, 2007
    Publication date: September 18, 2008
    Inventor: Po-Chun Chen
  • Patent number: 7288997
    Abstract: A phase lock loop and the control method thereof. The phase lock loop adjusts operating states automatically to generate a feedback clock for tracing a reference clock. The control method generates the first and second clocks corresponding to the highest and lowest frequency oscillating clocks respectively generated by the phase lock loop when operating in one of select states. The frequencies of the first and second clocks are compared to the frequency of the reference clock respectively, thereby holding the select state of the phase lock loop when the first, second, and reference clocks are in a first predetermined condition or changing the select state of the phase lock loop when in a second predetermined condition.
    Type: Grant
    Filed: February 28, 2005
    Date of Patent: October 30, 2007
    Assignee: Via Technologies, Inc.
    Inventor: Po-Chun Chen
  • Publication number: 20060103476
    Abstract: A phase lock loop and the control method thereof. The phase lock loop adjusts operating states automatically to generate a feedback clock for tracing a reference clock. The control method generates the first and second clocks corresponding to the highest and lowest frequency oscillating clocks respectively generated by the phase lock loop when operating in one of select states. The frequencies of the first and second clocks are compared to the frequency of the reference clock respectively, thereby holding the select state of the phase lock loop when the first, second, and reference clocks are in a first predetermined condition or changing the select state of the phase lock loop when in a second predetermined condition.
    Type: Application
    Filed: February 28, 2005
    Publication date: May 18, 2006
    Inventor: Po-Chun Chen
  • Patent number: 7012455
    Abstract: A frequency divider and related frequency divider designing method for forming a target clock by dividing an original clock by n.5 are disclosed. The method includes the following steps: (a) determining a frequency-dividing ratio of n.5*2, (b) generating a first triggering phase and a second triggering phase relating to the original clock by determining the frequency-dividing ratio, (c) selecting a positive frequency dividing circuit or a negative frequency dividing circuit and an initial value setting manner for the selected positive or negative frequency dividing circuits, and (d) generating the target clock according to the first and second target clocks.
    Type: Grant
    Filed: January 15, 2004
    Date of Patent: March 14, 2006
    Assignee: VIA Technologies Inc.
    Inventor: Po-Chun Chen
  • Publication number: 20050088210
    Abstract: A frequency divider and related frequency divider designing method for forming a target clock by dividing an original clock by n.5 are disclosed. The method includes the following steps: (a) determining a frequency-dividing ratio of n.5*2, (b) generating a first triggering phase and a second triggering phase relating to the original clock by determining the frequency-dividing ratio, (c) selecting a positive frequency dividing circuit or a negative frequency dividing circuit and an initial value setting manner for the selected positive or negative frequency dividing circuits, and (d) generating the target clock according to the first and second target clocks.
    Type: Application
    Filed: January 15, 2004
    Publication date: April 28, 2005
    Inventor: Po-Chun Chen