Patents by Inventor Pai-Chung Chien

Pai-Chung Chien 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).

  • Methods of measuring image-sticking of a display
    Patent number: 8164603
    Abstract: A method of measuring image-sticking of a display is described. A display having N gray levels is provided. Next, an image-stick test frame having at least a first pattern having a low gray level and at least a second pattern having a high gray level is displayed on the display. After the image-stick test frame is displayed for a while, an image-stick region and a non-image-stick region are formed on the display. A measuring frame is then displayed on the display, wherein the non-image-stick region in the measuring frame has a standard gray level M. A plurality of middle gray levels is sequentially displayed on the image-stick region in the measuring frame. When the boundary between the non-image-stick region and the image-stick region in measuring frame is the lightest, the middle gray level is converted into an image-sticking level.
    Type: Grant
    Filed: December 12, 2007
    Date of Patent: April 24, 2012
    Assignee: Chunghwa Picture Tubes, Ltd.
    Inventors: Chien-Pang Lee, Chien-Hui Yang, Ming-Wei Huang, Mei-Chi Fu, Pai-Chung Chien
  • METHODS OF MEASURING IMAGE-STICKING OF A DISPLAY
    Publication number: 20080303766
    Abstract: A method of measuring image-sticking of a display is described. A display having N gray levels is provided. Next, an image-stick test frame having at least a first pattern having a low gray level and at least a second pattern having a high gray level is displayed on the display. After the image-stick test frame is displayed for a while, an image-stick region and a non-image-stick region are formed on the display. A measuring frame is then displayed on the display, wherein the non-image-stick region in the measuring frame has a standard gray level M. A plurality of middle gray levels is sequentially displayed on the image-stick region in the measuring frame. When the boundary between the non-image-stick region and the image-stick region in measuring frame is the lightest, the middle gray level is converted into an image-sticking level.
    Type: Application
    Filed: December 12, 2007
    Publication date: December 11, 2008
    Applicant: CHUNGHWA PICTURE TUBES, LTD.
    Inventors: Chien-Pang Lee, Chien-Hui Yang, Ming-Wei Huang, Mei-Chi Fu, Pai-Chung Chien