Patents by Inventor KRYGER DE JOZEF

KRYGER DE JOZEF 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).

  • Alternating-current LED drive circuit
    Patent number: 10588188
    Abstract: An alternating-current LED drive circuit, comprising a plurality of LED strings connected between an alternating-current voltage source and a ground, any one of the LED strings being correspondingly provided with a conversion switch and one or more LED light sources being connected in series in any one of the LED strings; a voltage detection unit used for detecting a voltage root mean square value of an alternating-current power supply signal in the connected alternating-current voltage source; and a switching logic control unit used for outputting, according to a voltage interval into which the voltage root mean square value detected by the voltage detection unit falls, a conversion control signal corresponding to the voltage interval to each conversion switch to corresponding to each LED string respectively control each conversion switch to perform a corresponding conversion action, the conversion action of each conversion switch enabling all LED strings to be connected in series or in parallel to adapt to
    Type: Grant
    Filed: December 3, 2014
    Date of Patent: March 10, 2020
    Assignee: SHANGHAI YAMING LIGHTING CO., LTD.
    Inventors: Kryger De Jozef, Xiaoliang Xu
  • ALTERNATING-CURRENT LED DRIVE CIRCUIT
    Publication number: 20190208594
    Abstract: An alternating-current LED drive circuit, comprising a plurality of LED strings connected between an alternating-current voltage source and a ground, any one of the LED strings being correspondingly provided with a conversion switch and one or more LED light sources being connected in series in any one of the LED strings; a voltage detection unit used for detecting a voltage root mean square value of an alternating-current power supply signal in the connected alternating-current voltage source; and a switching logic control unit used for outputting, according to a voltage interval into which the voltage root mean square value detected by the voltage detection unit falls, a conversion control signal corresponding to the voltage interval to each conversion switch to corresponding to each LED string respectively control each conversion switch to perform a corresponding conversion action, the conversion action of each conversion switch enabling all LED strings to be connected in series or in parallel to adapt to
    Type: Application
    Filed: December 3, 2014
    Publication date: July 4, 2019
    Applicant: SHANGHAI YAMING LIGHTING CO., LTD.
    Inventors: KRYGER DE JOZEF, XIAOLIANG XU