Light emitting diode driving circuit

• US 20050122062A1
• Filed: 12/09/2003
• Published: 06/09/2005
• Est. Priority Date: 12/09/2003
• Status: Abandoned Application

• Current Assignee: Yung-Hsiang Hsu
• Original Assignee: Yung-Hsiang Hsu
• Inventors: Hsu, Yung-Hsiang
• Application Number:
  US10/729,929
• Publication Number:
  US 20050122062A1
• Time in Patent Office: Days
• US Class Current: 315/291
• CPC Class Codes: H05B 45/10 Controlling the intensity of the light
• CPC Class Codes: H05B 45/30 Driver circuits
• CPC Class Codes: Y02B 20/30 Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

Abstract

A light emitting diode (LED) driving circuit includes a power supply, a rectification circuit, an LED array and a current control circuit. The invention is characterized that, when the power supply passes through the current control circuit, using charging and discharging of a capacitor and parallel equivalent resistance current-limiting characteristics of a capacitor and a resistor, the rectification circuit converts an alternating current into a direct current that is outputted to the LED array, thereby providing the LED array with a stable quota driving current.

Claims

1-2. -2. (canceled)

3. A light emitting diode driving circuit comprising:

a) a power supply providing a current;

b) a current control circuit connected to the power supply and having;

i) a first resistor;

ii) a first capacitor connected in parallel with the first resistor; and

iii) a second resistor connected in series with the first resistor and the first capacitor;

c) a light emitting diode array having a plurality of light emitting diodes;

d) a rectification circuit connected between the current control circuit and the light emitting diode array and converting an alternating current into a direct current, the second resistor being located between the rectification circuit and the first resistor and the first capacitor; and

e) a second capacitor connected before the light emitting diode array and providing a charging-discharging effect and increasing a conductance.

4. The light emitting diode driving circuit according to claim 3, wherein the current of the power supply includes an alternating current and a direct current.