Patents Assigned to CeeLite, Inc.
  • Patent number: 7990362
    Abstract: A ballast (11) includes a variable output DC converter source (12) and an inverter circuit (14) arranged to provide AC output voltage to an electro-luminescent (EL) lamp (16). A Q factor of EL lamp can characterize the age of the EL lamp. A series resonance-parallel loaded circuit and two voltage detector (18, 20) are constructed to measure the Q factor. A processor (17) controls the output of DC voltage source in accordance with a look-up table containing constant brightness algorithm based on the derived voltage and Q relationship.
    Type: Grant
    Filed: April 22, 2010
    Date of Patent: August 2, 2011
    Assignee: Ceelite, Inc.
    Inventor: Chih-Ping Liang
  • Patent number: 7816864
    Abstract: A double-shielded electroluminescent panel includes an electroluminescent device, an upper electrical shield and a lower electrical shield. The upper electrical shield is a transparent conductive material, and is overlaid on the illuminating surface of the electroluminescent device. The lower electrical shield is an electrical conductive material, and is mounted on the non-illuminating surface of the electroluminescent device. The upper electrical shield and lower electrical shield are together connected to the ground line of a power source. Therefore, the occurrence of electromagnetic interference and an electric shock is avoided.
    Type: Grant
    Filed: February 16, 2005
    Date of Patent: October 19, 2010
    Assignee: CeeLite, Inc.
    Inventors: Chih Ping Liang, Huei Pin Huang
  • Publication number: 20100237804
    Abstract: A ballast (11) includes a variable output DC converter source (12) and an inverter circuit (14) arranged to provide AC output voltage to an electro-luminescent (EL) lamp (16). A Q factor of EL lamp can characterize the age of the EL lamp. A series resonance-parallel loaded circuit and two voltage detector (18, 20) are constructed to measure the Q factor. A processor (17) controls the output of DC voltage source in accordance with a look-up table containing constant brightness algorithm based on the derived voltage and Q relationship.
    Type: Application
    Filed: April 22, 2010
    Publication date: September 23, 2010
    Applicant: CeeLite, Inc.
    Inventor: Chih-Ping Liang