Patent ID: 7825612
Filing Date: 2010-11-02
Classification: H05B,Y02B

Abstract:
1. A light emitting diode array driving apparatus for driving a light emitting array having a plurality of light emitting diodes connected to one another, comprising: a direct current-direct current converting part comprising: a current/voltage detecting part detecting a magnitude of a first current flowing through the switching transistor to correspondingly output a first current detection voltage, detecting a magnitude of a both-end voltage of the light emitting diode array to correspondingly output a light emitting diode array detection voltage, and detecting a magnitude of a current flowing through the light emitting diode array to correspondingly output a second current detection voltage; and a constant current controlling part controlling an on/off duty of the switching transistor according to the magnitude of the first current detection voltage, the second current detection voltage and the light emitting diode array detection voltage detected by the current/voltage detecting part.