Patent ID: 9066402
Filing Date: 2015-06-23
Classification: H05B

Abstract:
1. A light emitting diode (LED)-based lighting fixture, comprising: at least one LED; a power source configured to provide electrical power to the at least one LED; a temperature sensor configured to measure a temperature at a selected location of the lighting fixture; and a controller connected between the temperature sensor and the power source, and configured to determine a temperature of a junction of the at least one LED based on the measured temperature, to determine a drive current based on the junction temperature, and to provide an input signal to the power source based on the determined drive current enabling the power source to drive the at least one LED in response to the input signal; wherein the controller further comprises a memory for storing a value of the drive current for a respective junction temperature; and, wherein the controller is configured to calculate the junction temperature of the at least one LED using the measured temperature from a location different from the junction.