Patent ID: 9161410
Filing Date: 2015-10-13
Classification: H05B

Abstract:
1. A light emitting diode driving apparatus applied to at least a light emitting diode and a user setting unit, the light emitting diode driving apparatus comprising: a light emitting diode driving unit electrically connected to the light emitting diode; a pulse width modulation control unit electrically connected to the light emitting diode driving unit and the user setting unit; and a dimming unit electrically connected to the pulse width modulation control unit, wherein the user setting unit sends a user side setting signal to the pulse width modulation control unit; the dimming unit sends a dimming signal to the pulse width modulation control unit; the pulse width modulation control unit multiplies a value of the user side setting signal by a value of the dimming signal to obtain a pulse width modulation output current control signal; the pulse width modulation control unit sends the pulse width modulation output current control signal to the light emitting diode driving unit; the light emitting diode driving unit multiplies a value of the pulse width modulation output current control signal by a value of a maximum output current of the light emitting diode driving unit to obtain a light emitting diode pulse width modulation driving current; the light emitting diode driving unit drives the light emitting diode by the light emitting diode pulse width modulation driving current; the user side setting signal is less than 1; the pulse width modulation output current control signal is used to control a percentage of the maximum output current of the light emitting diode driving unit.