Patents by Inventor Armand Boudewijn Perduijn

Armand Boudewijn Perduijn 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).

  • Circuit arrangement
    Patent number: 6930452
    Abstract: In a circuit arrangement for driving a LED array comprising red, green and blue LEDs, a control loop is added for limiting the duty cycles of the control signals for driving the red, green and blue LEDs. In case one of the duty cycles reaches the limit value, the reference signals for the red, green and blue light are decreased with the same relative amount. The color point of the light is thereby maintained, even when the efficiency of part of the LEDs decreases.
    Type: Grant
    Filed: October 9, 2003
    Date of Patent: August 16, 2005
    Assignee: Lumileds Lighting U.S., LLC
    Inventors: Jozef Petrus Emanuel De Krijger, Armand Boudewijn Perduijn, Engbert Bernard Gerard Nijhof, Marcel Johannes Maria Bucks
  • Circuit arrangement
    Publication number: 20040130518
    Abstract: In a circuit arrangement for driving a LED array comprising red, green and blue LEDs, a control loop is added for limiting the duty cycles of the control signals for driving the red, green and blue LEDs. In case one of the duty cycles reaches the limit value, the reference signals for the red, green and blue light are decreased with the same relative amount. The color point of the light is thereby maintained, even when the efficiency of part of the LEDs decreases.
    Type: Application
    Filed: October 9, 2003
    Publication date: July 8, 2004
    Applicant: Lumileds Lighting U.S., LLC
    Inventors: Jozef Petrus Emanuel De Krijger, Armand Boudewijn Perduijn, Engbert Bernard Gerard Nijhof, Marcel Johannes Maria Bucks