Patents by Inventor Thai La

Thai La 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).

  • Pulse width modulation (PWM) closed loop LED current driver in an embedded system
    Patent number: 8400080
    Abstract: Methods and systems for providing stable and accurate low noise DC reference voltage are described. In the described embodiments, a feedback controlled DC reference voltage supply provides a stable and well controlled sense current. The sense current is in turn used to produce a stable and well controlled light output from a light emitting diode (LED).
    Type: Grant
    Filed: June 28, 2011
    Date of Patent: March 19, 2013
    Assignee: Apple Inc.
    Inventors: Li-Quan Tan, Wing Kong Low, Thai La
  • PULSE WIDTH MODULATION (PWM) CLOSED LOOP LED CURRENT DRIVER IN AN EMBEDDED SYSTEM
    Publication number: 20110254464
    Abstract: Methods and systems for providing stable and accurate low noise DC reference voltage are described. In the described embodiments, a feedback controlled DC reference voltage supply provides a stable and well controlled sense current. The sense current is in turn used to produce a stable and well controlled light output from a light emitting diode (LED).
    Type: Application
    Filed: June 28, 2011
    Publication date: October 20, 2011
    Applicant: Apple Inc.
    Inventors: Li-Quan Tan, Wing Kong Low, Thai La
  • Pulse width modulation (PWM) closed loop LED current driver in an embedded system
    Patent number: 7994730
    Abstract: Methods and systems for providing stable and accurate low noise DC reference voltage are described. In the described embodiments, a feedback controlled DC reference voltage supply provides a stable and well controlled sense current. The sense current is in turn used to produce a stable and well controlled light output from a light emitting diode (LED).
    Type: Grant
    Filed: June 4, 2009
    Date of Patent: August 9, 2011
    Assignee: Apple Inc.
    Inventors: Li-Quan Tan, Wing Kong Low, Thai La
  • PULSE WIDTH MODULATION (PWM) CLOSED LOOP LED CURRENT DRIVER IN AN EMBEDDED SYSTEM
    Publication number: 20100308747
    Abstract: Methods and systems for providing stable and accurate low noise DC reference voltage are described. In the described embodiments, a feedback controlled DC reference voltage supply provides a stable and well controlled sense current. The sense current is in turn used to produce a stable and well controlled light output from a light emitting diode (LED).
    Type: Application
    Filed: June 4, 2009
    Publication date: December 9, 2010
    Applicant: APPLE INC.
    Inventors: Li-Quan Tan, Wing Kong Low, Thai La
  • Keyboard having a lighting system
    Patent number: 6987466
    Abstract: A keyboard and methods of making the same. The keyboard comprises of a bottom conducting base plate, an illumination layer, a transparent top conducting layer, a light transmissive keyboard membrane, and a plurality of input keys. The illumination layer is deposited on the bottom conducting base plate. The transparent top conducting layer is deposited on the illumination layer. The light transmissive keyboard membrane is disposed on the transparent top conducting layer. And, the plurality of input keys is disposed on the light transmissive keyboard membrane wherein each of the plurality of input keys has a keyswitch mechanism and a keycap including an upper strike surface attached to the keyswitch mechanism.
    Type: Grant
    Filed: March 8, 2002
    Date of Patent: January 17, 2006
    Assignee: Apple Computer, Inc.
    Inventors: Harold Welch, Wing Kong Low, Benjamin Lyon, Duncan Kerr, Thai La, Brian Berkeley