Patents by Inventor Chegn Nan TSAI

Chegn Nan 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).

  • Image system and interference removing method thereof
    Patent number: 9131162
    Abstract: There is provided an interference removing method of an image system including the steps of: respectively acquiring different numbers of images within two brightness intervals having different brightness variations using an image sensor having a sampling frequency; lighting a light source with a lighting frequency, which is a half of the sampling frequency, and synchronizing to the sampling frequency; and subtracting a first image, which is associated with the lighting of the light source, acquired in a later brightness interval of two adjacent brightness intervals having identical brightness variations by a second image, which is associated with a sampling time of the first image, acquired in an earlier brightness interval of the two adjacent brightness intervals. The present disclosure further provides an image system.
    Type: Grant
    Filed: December 19, 2011
    Date of Patent: September 8, 2015
    Assignee: PIXART IMAGING INC
    Inventors: Chegn Nan Tsai, Ching Lin Chung, Chi Chieh Liao, Chun Yi Lu
  • IMAGE SYSTEM AND INTERFERENCE REMOVING METHOD THEREOF
    Publication number: 20120188416
    Abstract: There is provided an interference removing method of an image system including the steps of: respectively acquiring different numbers of images within two brightness intervals having different brightness variations using an image sensor having a sampling frequency; lighting a light source with a lighting frequency, which is a half of the sampling frequency, and synchronizing to the sampling frequency; and subtracting a first image, which is associated with the lighting of the light source, acquired in a later brightness interval of two adjacent brightness intervals having identical brightness variations by a second image, which is associated with a sampling time of the first image, acquired in an earlier brightness interval of the two adjacent brightness intervals. The present disclosure further provides an image system.
    Type: Application
    Filed: December 19, 2011
    Publication date: July 26, 2012
    Applicant: PIXART IMAGING INC.
    Inventors: Chegn Nan TSAI, Ching Lin CHUNG, Chi Chieh LIAO, Chun Yi LU