Patents by Inventor Frank J P Schuurmans

Frank J P Schuurmans 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).

  • Side-emitting rod for use with an LED-based light engine
    Patent number: 6783269
    Abstract: According to this invention, a side-emitting illumination device for uniformly distributing light is composed of an LED light source, a light-transmitting rod which permits total internal reflection, and outcoupling material affixed to an outer surface of the rod. Light enters the rod at one end and travels along the rod by total internal reflection. Light that hits the outcoupling material is angularly distributed based on the width of the outcoupling material.
    Type: Grant
    Filed: December 27, 2000
    Date of Patent: August 31, 2004
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Michael D. Pashley, Thomas M. Marshall, Frank J. P. Schuurmans
  • LED luminaire with light sensor configurations for optical feedback
    Patent number: 6741351
    Abstract: White light emitting LED luminaire incorporates an array of red, green and blue emitting LEDs and a feedback arrangement to maintain a desired color balance. The feedback arrangement includes photodiodes positioned and enabled to separately measure the light output of each RGB color component. In one embodiment, a single photodiode or array of photodiodes is positioned to intercept reflected light from a partially reflecting element placed in the path of the combined output of the LED array. Individual colors are measured sequentially by pulsing the LEDs and photodiodes or by the use of color filters. In an alternate embodiment, each LED has an associated photodiode, either incorporated into the LED package or in a separate package.
    Type: Grant
    Filed: June 7, 2001
    Date of Patent: May 25, 2004
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Thomas M Marshall, Michael D Pashley, Frank J P Schuurmans
  • LED luminaire with light sensor configurations for optical feedback
    Publication number: 20030030808
    Abstract: White light emitting LED luminaire incorporates an array of red, green and blue emitting LEDs and a feedback arrangement to maintain a desired color balance. The feedback arrangement includes photodiodes positioned and enabled to separately measure the light output of each RGB color component. In one embodiment, a single photodiode or array of photodiodes is positioned to intercept reflected light from a partially reflecting element placed in the path of the combined output of the LED array. Individual colors are measured sequentially by pulsing the LEDs and photodiodes or by the use of color filters. In an alternate embodiment, each LED has an associated photodiode, either incorporated into the LED package or in a separate package.
    Type: Application
    Filed: June 7, 2001
    Publication date: February 13, 2003
    Inventors: Thomas M. Marshall, Michael D. Pashley, Frank J.P. Schuurmans
  • Side-emitting rod for use with an LED-based light engine
    Publication number: 20020080623
    Abstract: According to this invention, a side-emitting illumination device for uniformly distributing light is composed of an LED light source, a light-transmitting rod which permits total internal reflection, and outcoupling material affixed to an outer surface of the rod. Light enters the rod at one end and travels along the rod by total internal reflection. Light that hits the outcoupling material is angularly distributed based on the width of the outcoupling material.
    Type: Application
    Filed: December 27, 2000
    Publication date: June 27, 2002
    Inventors: Michael D. Pashley, Thomas M. Marshall, Frank J.P. Schuurmans