Patents by Inventor Paulo LOOKMAN

Paulo LOOKMAN 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).

  • Supply circuit for a LED controller
    Patent number: 10045409
    Abstract: A supply circuit adapted to provide a continuous power supply for a string of serially connected light emitting elements driven with a current source, said supply circuit including: a voltage supply capacitor connected to said string and being adapted to provide a supply voltage for a driving control unit configured to control the light emitting elements of said string; and a capacitor bypass switch connected in parallel with said voltage supply capacitor and being controlled by a local control circuit of said driving control unit, wherein said capacitor bypass switch is switched off by said local control circuit to charge said voltage supply capacitor with a charging current to maintain a continuous power supply without disturbing the current to said string of light emitting elements.
    Type: Grant
    Filed: May 11, 2017
    Date of Patent: August 7, 2018
    Assignee: ROHM CO., LTD.
    Inventors: Paulo Lookman, Michael Haase, Mats Schmalhorst, Markus Spitz
  • Method and apparatus for reducing flickering of emitted light
    Patent number: 10015857
    Abstract: A light emitting apparatus including: a light emitting array having at least one light emitting string of serial connected light emitting elements, wherein a bypass switch is connected in parallel to each light emitting element of said light emitting string; and a driving control unit controlling a shift timing of the bypass switches to reduce a variation of a voltage drop across the light emitting string.
    Type: Grant
    Filed: May 11, 2017
    Date of Patent: July 3, 2018
    Assignee: ROHM CO., LTD.
    Inventor: Paulo Lookman
  • SUPPLY CIRCUIT FOR A LED CONTROLLER
    Publication number: 20170332448
    Abstract: A supply circuit adapted to provide a continuous power supply for a string of serially connected light emitting elements driven with a current source, said supply circuit including: a voltage supply capacitor connected to said string and being adapted to provide a supply voltage for a driving control unit configured to control the light emitting elements of said string; and a capacitor bypass switch connected in parallel with said voltage supply capacitor and being controlled by a local control circuit of said driving control unit, wherein said capacitor bypass switch is switched off by said local control circuit to charge said voltage supply capacitor with a charging current to maintain a continuous power supply without disturbing the current to said string of light emitting elements.
    Type: Application
    Filed: May 11, 2017
    Publication date: November 16, 2017
    Inventors: Paulo LOOKMAN, Michael HAASE, Mats SCHMALHORST, Markus SPITZ
  • METHOD AND APPARATUS FOR REDUCING FLICKERING OF EMITTED LIGHT
    Publication number: 20170332452
    Abstract: A light emitting apparatus including: a light emitting array having at least one light emitting string of serial connected light emitting elements, wherein a bypass switch is connected in parallel to each light emitting element of said light emitting string; and a driving control unit controlling a shift timing of the bypass switches to reduce a variation of a voltage drop across the light emitting string.
    Type: Application
    Filed: May 11, 2017
    Publication date: November 16, 2017
    Inventor: Paulo LOOKMAN