Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Ming-Te Lin0
Farn-Shiun Hwu0
Jyh-Chen Chen0
Kuang-Yu Tai0
Date of Patent
July 19, 2011
0Patent Application Number
123532940
Date Filed
January 14, 2009
0Patent Primary Examiner
Patent abstract
The present invention provides a method for measuring the PN-junction temperature of a light-emitting diode (LED), which uses a reference voltage to establish the function of current, real power, power factor, or driving-time interval on temperature. The initial and thermal-equilibrium values of current, real power, power factor, or driving-time interval are measured, and hence the variations thereof are calculated. Referring to the pre-established function, the temperature change is given. By the temperature change and the initial temperature, the PN-junction temperature of the LED is thereby deduced.
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