Patents by Inventor Cheng Ching Chi

Cheng Ching Chi 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).

  • Publication number: 20110025216
    Abstract: The LED driver of the present invention comprises multiple LED arrays, at least one dividing diode, a power module, a driving module, at least one switch pair and a voltage sensing module, Each LED array comprises multiple LEDs connected in series. The dividing diode is mounted between adjacent LED arrays. The power module is connected to an external power source and forms a pulsating direct current (DC) voltage. The driving module receives the pulsating DC voltage outputs a constant current to the LED arrays, The voltage sensing module closes and opens the switch pairs that changes electrical configuration of the LED arrays. The LED driving method of the present invention comprises setting multiple voltage drops and at least one reference voltage; sensing an incoming voltage to compare with the reference voltage; and changing ways of connections of LED arrays based on the reference voltage and the incoming voltage.
    Type: Application
    Filed: January 29, 2010
    Publication date: February 3, 2011
    Applicant: Advanced-Connectek, Inc.
    Inventors: Cheng Ching-Chi, Wen-Hsiang Chien
  • Patent number: 6218786
    Abstract: A lamp string controlling device includes a power supply circuit constituted by a transformer and a rectification circuit for converting an alternate current into a direct current. A harmonic oscillation circuit is connected between the transformer and the rectification circuit for eliminating noise and electromagnetic interference. A single chip based control circuit is connected between the power supply circuit and a driver circuit which drives a lamp string. The control circuit controls the lighting status of the lamp string between a full load condition and a non-full load condition in a variety of styles. A timing circuit having a time constant is coupled to the control circuit for switching the lamp string from a full load condition to the non-full load condition after a time period determined by the time constant thereof whereby overall power consumption of the lamp string may be lowered down and thus a small-sized transformer suffices for the operation of the lamp string.
    Type: Grant
    Filed: February 29, 2000
    Date of Patent: April 17, 2001
    Inventor: Cheng Ching Chi