Light emitting diode lamp assembly

• US 7,482,761 B2
• Filed: 11/29/2006
• Issued: 01/27/2009
• Est. Priority Date: 11/29/2006
• Status: Active Grant

• Current Assignee: Chen-Sheng Yang
• Original Assignee: Chen-Sheng Yang
• Inventors: Yang, Chen-Sheng
• Primary Examiner(s): Owens; Douglas W.
• Assistant Examiner(s): Vu; Jimmy T
• Application Number:
  US11/605,896
• Publication Number:
  US 20080122375A1
• Time in Patent Office: 790 Days
• Field of Search: 315/209.R, 315/224, 315/246, 315/291, 315/307, 315/185.R, 315/185.S, 315/187, 315/188, 315/193, 315/324, 315/352, 315/297, 362/234, 362/252, 362/800
• US Class Current: 315/185.00R
• CPC Class Codes: F21S 4/10 with light sources attached to loose electric cables, e.g. Christmas tree lights
• CPC Class Codes: F21V 23/00 Arrangement of electric circuit elements in or on lighting devices characterised by cooling arrangements F21V29/508
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: Y10S 362/80 Light emitting diode

Abstract

A light emitting diode (LED) lamp assembly comprises an LED string and a plug. The LED string comprises multiple LEDs connected together in series. The plug is connected to the LED string and an external AC power source and has a circuit board. The circuit board is mounted in the plug, turns the LED string on or off, converts AC power to DC power and comprises an AC/DC circuit, a control circuit and a switch circuit. The AC/DC circuit is connected to the external AC power source and the LED string and converts AC power to DC power to provide operating power for the LEDs. The control circuit is connected to the AC/DC circuit to regulate illumination of the LEDs. The switch circuit is connected between the LED string and the AC/DC circuit and is controlled by the control circuit to turn the LEDs on or off.

Claims

1. A light emitting diode lamp assembly comprising:

a light emitting diode (LED) string comprising multiple light emitting diodes (LEDs) connected in series; and

a plug connected to the LED string and an external AC power source and having

a circuit board mounted in the plug, turning the LED string on or off, converting AC power to DC power and comprising

an AC/DC circuit connected to the external AC power source and the LED string and converting AC power to DC power to provide operating power for the LEDs;

a control circuit connected to the AC/DC circuit to regulate illumination of the LEDs; and

a switch circuit connected between the LED string and the AC/DC circuit, activated by the control circuit to turn the LEDs on or off and being a silicon controlled rectifier (SCR) having

an anode terminal connected to the LED string;

a cathode terminal connected to the AC/DC circuit; and

a gate terminal connected to the control circuit.

2. The light emitting diode lamp assembly as claimed in claim 1, wherein the control circuit comprises

a variable resistor connected to the AC/DC circuit;

a capacitor connected to the variable resistor; and

a diode alternating current switch (DIAC) connected to the variable resistor in parallel with the capacitor.

3. The light emitting diode lamp assembly as claimed in claim 2, wherein the AC/DC circuit is a bridge rectifier.

4. The light emitting diode lamp assembly as claimed in claim 1, wherein the AC/DC circuit is a bridge rectifier.