Patents by Inventor Chi Keung Lau

Chi Keung 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).

  • Lamp module and lighting device comprising such a lamp module
    Patent number: 8042967
    Abstract: The present invention relates to a lamp module (10) comprising at least one light emitting diode (LED) chip (12) for emitting light, means (13, 15, 16, 17) for extracting and shaping the light emitted from the chip(s), and a base (21) for allowing the lamp module to be fitted and connected to a lighting device. The lamp module is characterized by at least one electrically switchable cell (22) adapted to receive light emitted from the LED chip(s), which cell in a first state transmits incoming light without substantially altering the direction of the light and in a second state alters the direction of the light when the light passes the cell(s). This allows for electrically controlled adjustable beam shaping. The present invention also relates to a lighting device (30) comprising such a lamp module.
    Type: Grant
    Filed: January 10, 2007
    Date of Patent: October 25, 2011
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Rifat Ata Mustafa Hikmet, Ties Van Bommel, Chi Keung Lau, Yiu Wing Ha
  • LAMP MODULE AND LIGHTING DEVICE COMPRISING SUCH A LAMP MODULE
    Publication number: 20100148688
    Abstract: The present invention relates to a lamp module (10) comprising at least one light emitting diode (LED) chip (12) for emitting light, means (13, 15, 16, 17) for extracting and shaping the light emitted from the chip(s), and a base (21) for allowing the lamp module to be fitted and connected to a lighting device. The lamp module is characterized by at least one electrically switchable cell (22) adapted to receive light emitted from the LED chip(s), which cell in a first state transmits incoming light without substantially altering the direction of the light and in a second state alters the direction of the light when the light passes the cell(s). This allows for electrically controlled adjustable beam shaping. The present invention also relates to a lighting device (30) comprising such a lamp module.
    Type: Application
    Filed: January 10, 2007
    Publication date: June 17, 2010
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.
    Inventors: Rifat Ata Mustafa Hikmet, Ties Van Bommel, Chi Keung Lau, Yiu Wing Ha