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DRIVE CIRCUIT, ILLUMINATION LIGHT SOURCE, AND LIGHTING APPARATUS

  • US 20140217897A1
  • Filed: 01/22/2014
  • Published: 08/07/2014
  • Est. Priority Date: 02/05/2013
  • Status: Active Grant
First Claim
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1. A drive circuit for turning on a light-emitting element, the drive circuit comprisinga self-excited inverter which supplies power to the light-emitting element,wherein the self-excited inverter includes a thermistor, and depending on temperature dependency of the thermistor, supplies a first power value to the light-emitting element when a temperature is a first temperature, and a second power value to the light-emitting element when a temperature is a second temperature higher than the first temperature, andthe second power value is smaller than a third power value to be supplied to the light-emitting element by a circuit when a temperature is the second temperature, the circuit not being provided with the thermistor and supplying the first power value to the light-emitting element when a temperature is the first temperature.

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