Thermal measuring and testing – Temperature measurement – By electrical or magnetic heat sensor
Reexamination Certificate
2008-07-08
2011-12-13
Guadalupe-McCall, Yaritza (Department: 2841)
Thermal measuring and testing
Temperature measurement
By electrical or magnetic heat sensor
C374S183000, C374S001000
Reexamination Certificate
active
08075182
ABSTRACT:
An apparatus for measuring a characteristic and a chip temperature of an LED includes a thermal conductive component. An LED chip is disposed on the thermal conductive component. A temperature control unit is connected to the thermal conductive component for providing a temperature to the thermal conductive component, and therefore providing the temperature to the LED chip via the thermal conductive component. A power-source and voltage-meter unit provides a current to the LED chip, and measures a voltage value of the LED chip. Under a measurement mode, the current is featured with a current waveform having a high current level and a low current level which are alternatively changed, for applying to the LED chip. Measurements are conducted respectively corresponding to the high current level and the low current level, and a correlation curve between the voltage and the temperature can be obtained with the results of measurement.
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Chien Heng-Chieh
Dai Ming-Ji
Li Sheng-Liang
Liu Chun-Kai
Yu Chih-Kuang
Guadalupe-McCall Yaritza
Industrial Technology Research Institute
Jianq Chyun IP Office
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