| 摘要 |
PURPOSE: A light emitting diode driving device is provided to prevent the aging and damage to the light emitting diode by reducing a driving current when a temperature rise. CONSTITUTION: A light emitting device(LED) has an anode and a cathode. The cathode is electrically connected to the earth. A constant current driving part(110) is electrically connected to the anode of the emitting device. The constant current driving part controls the amount of current. The constant current driving part has a negative coefficient reducing the amount of current.
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