Pulse-controlled light emitting diode source United States Patent 06222172

06222172 is referenced by 64 patents and cites 2 patents.

A light-emitting diode array is driven by a digital control. The digital control modulates the pulse width of pulses applied to the light-emitting diode. The intensity of the output is controlled by controlling the width of pulses applied to the light-emitting diode. Since light-emitting diodes have very low inertial energy, this system can be rapidly turned on and turned off. The output is integrated to produce a uniform output.

Title
Pulse-controlled light emitting diode source
Application Number
9/246013
Publication Number
6222172 (B1)
Application Date
February 4, 1999
Publication Date
April 24, 2001
Inventor
Gregory Waligorski
Arcadia
CA, US
Eric R Fossum
La Crescenta
CA, US
Agent
Fish & Richardson P C
US
Assignee
Photobit Corporation
CA, US
IPC
G01J 5/30
View Original Source

Citations: 64 (view full list)

  1. Terry Given, Michael Harris, Peter Jay Myers: Lighting control device for controlling dimming, lighting device including a control device, and method of controlling lighting. Cree, Burr & Brown, February 14, 2012: US08115419 (93 worldwide citation)
  2. Peter Jay Myers, Michael Harris, Terry Given: Frequency converted dimming signal generation. Cree, Burr & Brown, October 18, 2011: US08040070 (59 worldwide citation)
  3. Steve S Lyons, Michael E Garbus Jr, Matthew H Aldrich: Step-wise intensity control of a solid state lighting system. Renaissance Lighting, McDermott Will & Emery, July 14, 2009: US07560677 (57 worldwide citation)
  4. James A Petrucci, Terry A Drabinski, David A Hite, Sheari A Rice: Lighting control system having temperature compensation and trim circuits. American Sterilizer Company, Kusner & Jaffe, Michael A Centanni, April 20, 2010: US07701151 (40 worldwide citation)
  5. Jack C Rains Jr, Christopher Bates, Matthew Brown: Optical integrating chamber lighting using multiple color sources for luminous applications. Advanced Optical Technologies, McDermott Will & Emery, May 20, 2008: US07374311 (36 worldwide citation)
  6. Jack C Rains: Lighting system using semiconductor coupled with a reflector have a reflective surface with a phosphor material. ABL IP Holding, McDermott Will & Emery, November 9, 2010: US07828459 (31 worldwide citation)
  7. Frederick M Morgan, Ihor A Lys: Systems and methods for calibrating light output by light-emitting diodes. Philips Solid State Lighting Solutions, September 6, 2011: US08013281 (26 worldwide citation)
  8. Antony P van de Ven, Terry Given: AC driven solid state lighting apparatus with LED string including switched segments. Cree, Myers Bigel Sibley & Sajovec PA, July 2, 2013: US08476836 (25 worldwide citation)
  9. Jack C Rains Jr, Don F May, David P Ramer: Intelligent solid state lighting. Advanced Optical Technologies, McDermott Will & Emery, April 21, 2009: US07521667 (22 worldwide citation)
  10. Matthew H Aldrich, Jack C Rains Jr: Dual LED board layout for lighting systems. Renaissance Lighting, McDermott Will & Emery, April 29, 2008: US07365991 (21 worldwide citation)

References: 2

  1. Shigeru Suga: Integrating sphere type standard light source device. Wenderoth Lind & Ponack, November 11, 1980: US04232971 (22 worldwide citation)
  2. Jack E Peterson: Lamp analyzer. Dupree, Harris Kern Wallen & Tinsley, January 19, 1988: US04720190 (5 worldwide citation)