| 摘要 |
PROBLEM TO BE SOLVED: To provide a light-emitting diode drive circuit.SOLUTION: A light-emitting diode drive circuit includes a controller 23, a switch 30, a capacitor 29, and at least one light-emitting diode 27. When a voltage at an input terminal of the controller 23 is over a forward bias voltage of the light-emitting diode 27, a first control signal generated by the controller 23 is transmitted to the switch 30, and the switch 30 electrically connects between a power supply 21 and the controller 23 and between the power supply 21 and the light-emitting diode 27. By an input voltage, the light emission of the light-emitting diode 27 is driven, and the capacitor 29 is charged. When an input voltage of the controller 23 is under the forward bias voltage of the light-emitting diode 27, a second control signal generated by the controller 23 is transmitted to the switch 30, and the switch 30 electrically connects only between the capacitor 29 and the light-emitting diode 27. By a discharge voltage of the capacitor 29, the light-emitting diode 27 is driven. |
