Patents by Inventor Chiang-Hee LIM

Chiang-Hee LIM 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).

  • Optical encoder capable of identifying absolute positions and operating method thereof
    Patent number: 10871385
    Abstract: The present disclosure is related to an optical encoder which is configured to provide precise coding reference data by feature recognition technology. To apply the present disclosure, it is not necessary to provide particular dense patterns on a working surface. The precise coding reference data can be generated by detecting surface features of the working surface.
    Type: Grant
    Filed: January 2, 2019
    Date of Patent: December 22, 2020
    Assignee: PIXART IMAGING INC.
    Inventors: Boon-How Kok, Keen-Hun Leong, Ching-Geak Chan, Chiang-Hee Lim, Chu-Leik Ho, Hsin-Chia Chen, Yen-Min Chang
  • Scheme capable of calibrating value of sampling precision of optical sensor for tracking
    Patent number: 10379192
    Abstract: A method for calibrating a value of sampling precision of an optical sensor for tracking includes: reading a precision variance and a setting precision value from a memory device; measuring the sampling precision of the optical sensor under a normal mode to generate an actually measured precision value; calculating a normalized value that is proportional to the actually measured precision value according to the precision variance, the actually measured precision value, and the setting precision value; and, calibrating the actually measured precision value by using the normalized value.
    Type: Grant
    Filed: July 19, 2016
    Date of Patent: August 13, 2019
    Assignee: PixArt Imaging (Penang) SDN. BHD.
    Inventor: Chiang Hee Lim
  • OPTICAL ENCODER CAPABLE OF IDENTIFYING ABSOLUTE POSITIONS AND OPERATING METHOD THEREOF
    Publication number: 20190138832
    Abstract: The present disclosure is related to an optical encoder which is configured to provide precise coding reference data by feature recognition technology. To apply the present disclosure, it is not necessary to provide particular dense patterns on a working surface. The precise coding reference data can be generated by detecting surface features of the working surface.
    Type: Application
    Filed: January 2, 2019
    Publication date: May 9, 2019
    Inventors: BOON-HOW KOK, KEEN-HUN LEONG, CHING-GEAK CHAN, CHIANG-HEE LIM, CHU-LEIK HO, HSIN-CHIA CHEN, YEN-MIN CHANG
  • Optical encoder capable of identifying absolute positions and operating method thereof
    Patent number: 10210412
    Abstract: The present disclosure is related to an optical encoder which is configured to provide precise coding reference data by feature recognition technology. To apply the present disclosure, it is not necessary to provide particular dense patterns on a working surface. The precise coding reference data can be generated by detecting surface features of the working surface.
    Type: Grant
    Filed: November 9, 2016
    Date of Patent: February 19, 2019
    Assignee: PIXART IMAGING INC.
    Inventors: Boon-How Kok, Keen-Hun Leong, Ching-Geak Chan, Chiang-Hee Lim, Chu-Leik Ho, Hsin-Chia Chen, Yen-Min Chang
  • SCHEME CAPABLE OF CALIBRATING VALUE OF SAMPLING PRECISION OF OPTICAL SENSOR FOR TRACKING
    Publication number: 20180024221
    Abstract: A method for calibrating a value of sampling precision of an optical sensor for tracking includes: reading a precision variance and a setting precision value from a memory device; measuring the sampling precision of the optical sensor under a normal mode to generate an actually measured precision value; calculating a normalized value that is proportional to the actually measured precision value according to the precision variance, the actually measured precision value, and the setting precision value; and, calibrating the actually measured precision value by using the normalized value.
    Type: Application
    Filed: July 19, 2016
    Publication date: January 25, 2018
    Inventor: Chiang Hee LIM
  • OPTICAL ENCODER CAPABLE OF IDENTIFYING ABSOLUTE POSITIONS AND OPERATING METHOD THEREOF
    Publication number: 20170061226
    Abstract: The present disclosure is related to an optical encoder which is configured to provide precise coding reference data by feature recognition technology. To apply the present disclosure, it is not necessary to provide particular dense patterns on a working surface. The precise coding reference data can be generated by detecting surface features of the working surface.
    Type: Application
    Filed: November 9, 2016
    Publication date: March 2, 2017
    Inventors: Boon-How KOK, Keen-Hun LEONG, Ching-Geak CHAN, Chiang-Hee LIM, Chu-Leik HO, Hsin-Chia CHEN, Yen-Min CHANG