Patents by Inventor Kuei-Hsueh Chen

Kuei-Hsueh 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).

  • Patent number: 7990401
    Abstract: A method for driving a liquid crystal display includes: a) receiving a video signal from a first group of gray scales values; b) comparing a current frame of the video signal with a previous frame to determine whether the current frame is in a static state or in a dynamic state; c) when the current frame is determined to be in the static state, converting the video signal to a driving signal; d) when the current frame is determined to be in the dynamic state, calculating a overdrive signal. The value of the driving signal is selected from a second group of gray scale values having at least one decimal point gray scale and having the same number of gray scale values as that of the first group of gray scale values. The value of the overdrive signal is selected from the first group of gray scale values.
    Type: Grant
    Filed: August 18, 2006
    Date of Patent: August 2, 2011
    Assignee: Au Optronics Corp.
    Inventors: Huan-Hsin Li, Yao-Jen Hsieh, Kuei-Hsueh Chen, Fang-Yu Su
  • Publication number: 20070052643
    Abstract: A method for driving a liquid crystal display includes: a) receiving a video signal from a first group of gray scales values; b) comparing a current frame of the video signal with a previous frame to determine whether the current frame is in a static state or in a dynamic state; c) when the current frame is determined to be in the static state, converting the video signal to a driving signal; d) when the current frame is determined to be in the dynamic state, calculating a overdrive signal. The value of the driving signal is selected from a second group of gray scale values having at least one decimal point gray scale and having the same number of gray scale values as that of the first group of gray scale values. The value of the overdrive signal is selected from the first group of gray scale values.
    Type: Application
    Filed: August 18, 2006
    Publication date: March 8, 2007
    Inventors: Huan-Hsin Li, Yao-Jen Hsieh, Kuei-Hsueh Chen, Fang-Yu Su
  • Publication number: 20060219700
    Abstract: A pixel driving method is used in a liquid crystal display. First, a temperature t of the liquid crystal display is detected. An initial level, and a target level are provided. A corresponding coefficient an is looked up in a lookup table based on the initial level and the target level. An overdrive level OD is estimated by substituting the coefficient an and a function of the temperature f(t) into the formula: OD = ? n = 0 N ? a n ? f ? ( t ) n Thereafter, a pixel is driven by the overdrive level OD to reach the target level within a time frame. The lookup table comprises a plurality of columns and rows. The columns define the initial levels, and the rows define the target levels. Each of a plurality of coefficients an corresponds to an intersection formed by one column and one row.
    Type: Application
    Filed: September 27, 2005
    Publication date: October 5, 2006
    Inventors: Siow-Fang Chen, Kuei-Hsueh Chen, Yao-Jen Hsieh