Patents by Inventor Kok Chien Lau

Kok Chien Lau 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).

  • Optocoupler with multiple photodetectors and improved feedback control of LED
    Patent number: 9012826
    Abstract: Various embodiments of methods and devices are provided for an optocoupler comprising a layer of dielectric optically semi-reflective and transmissive material disposed between an LED and a first photodetector located above an upper surface of the layer, and a second photodetector located beneath the lower surface of the layer. The layer reflects a first portion of light generated by the LED towards the first photodetector to generate LED feedback control signals, and transmits a second portion of light generated by the LED through the layer for detection by the second photodetector to generate isolated output signals.
    Type: Grant
    Filed: January 3, 2012
    Date of Patent: April 21, 2015
    Assignee: Avago Technologies General IP (Singapore) Pte. Ltd.
    Inventors: Chee Mang Wong, Kok Chien Lau, Chin Hian Sia
  • Optocoupler with Multiple Photodetectors and Improved Feedback Control of LED
    Publication number: 20130168531
    Abstract: Various embodiments of methods and devices are provided for an optocoupler comprising a layer of dielectric optically semi-reflective and transmissive material disposed between an LED and a first photodetector located above an upper surface of the layer, and a second photodetector located beneath the lower surface of the layer. The layer reflects a first portion of light generated by the LED towards the first photodetector to generate LED feedback control signals, and transmits a second portion of light generated by the LED through the layer for detection by the second photodetector to generate isolated output signals.
    Type: Application
    Filed: January 3, 2012
    Publication date: July 4, 2013
    Applicant: Avago Technologies ECBU IP (Singapore) Pte. Ltd.
    Inventors: Chee Mang Wong, Kok Chien Lau, Chin Hian Sia