Industry Patents

Patent: 7132805

Intelligent Drive Circuit for a Light Emitting Diode (LED) Light Engine

(Click image for PDF of full patent)


Patent Number: 7132805 
Title: Intelligent Drive Circuit for a Light Emitting Diode (LED) Light Engine 
Abstract: A controller for controlling a light emitting diode (LED) light engine. The controller includes a temperature sensor configured to sensor temperature at the LED light engine. A current sensor senses a drive current of the LED light engine. A voltage differential sensor senses a voltage differential across LEDs of the LED light engine. A timer monitors a time of operation of the LED light engine. Further, a control device controls the drive current to the LED light engine based on the sensed temperature, the sensed drive current, the sensed voltage differential, and the monitored time of operation. Further, the control device outputs an indication of intensity degradation of an LED, and if the intensity degradation exceeds a predetermined threshold the control can output an indication of such to a user, so that the user can be apprised that the LED needs to be changed.  
Country of Issue: US 
First Named Inventor: Young 
Assignee: Dialight 
Continuation or Divisional of:  
International Classification: H05B 37/02 
US Classification: 315/308 
Issue Date: 11-07-2006 
Filing Date: 08-09-2004 
Application : 10/913451 
Link to Text Only at USPTO: Text Only (Click on image above for full pdf) 
Link to World Patent Family1: World Patent Family at European Patent Office 
Link to Google Patents1: 7132805 at Google Patents 


1. The Google Patents and World Patent Family links will likely not work until a few weeks
after the patent has issued - they take a while to get new patents in their systems.

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