Patent ID: 8541956

Claim:
A light emitting diode driving method, comprising steps of: providing a first pulse width modulation signal to determine brightness of a light emitting diode; obtaining a duty cycle of the first pulse width modulation signal; and selectively enabling the light emitting diode to work with a pulse width modulation dimming mode or a direct current dimming mode according to a relative relationship between a magnitude of the duty cycle and a preset threshold value; wherein the step of selectively enabling the light emitting diode to work with the pulse width modulation dimming mode or the direct current dimming mode according to the relative relationship between the magnitude of the duty cycle and the preset threshold value comprises: enabling the light emitting diode to work with the pulse width modulation dimming mode when the duty cycle is less than the preset threshold value; and enabling the light emitting diode to work with the direct current dimming mode when the duty cycle is no less than the preset threshold value.