Structure for LED lighting chain

• US 20050110426A1
• Filed: 04/29/2004
• Published: 05/26/2005
• Est. Priority Date: 11/21/2003
• Status: Active Grant

• Current Assignee: Jinhong Deng
• Original Assignee: Jinhong Deng
• Inventors: Shao, Chiliang
• Granted Patent: US 6,972,528 B2
• Time in Patent Office: Days
• US Class Current: 315/185.R
• CPC Class Codes: F21S 4/10 with light sources attached to loose electric cables, e.g. Christmas tree lights
• CPC Class Codes: H05B 45/30 Driver circuits

Abstract

An improved structure for LED lighting comprising an AC to DC converter, said converter comprising four rectifying diodes, and at least one LED serial set. The rectifying diodes can be divided into a first and second group, each group comprising two diodes. The negative ends of the two rectifying diodes of the first group can be connected in parallel and their positive ends can be connected with a positive and negative end of the front and rear plugs respectively. The positive ends of the two rectifying diodes of the second group can be connected together in parallel and their negative ends can be connected with the positive and negative ends of the front and rear plugs respectively. The LED serial set can be connected between the negative end of the rectifying diodes of the first group and the positive end of the rectifying diodes of the second group.

Claims

1. An improved structure for an LED lighting chain, including:

a front plug and a rear plug, each plug having at least one of a positive connection and a negative connection;

an AC to DC converter comprising four rectifying diodes;

at least one LED serial set;

the AC to DC converter, wherein the four rectifying diodes are divided into a first group and a second group;

each group comprising two rectifying diodes, with negative ends of the two rectifying diodes of the first group being connected in parallel and positive ends of the two rectifying diodes of the first group being connected with the positive and negative connection of the front and rear plugs respectively, and positive ends of the two rectifying diodes of the second group being connected together in parallel and negative ends of the two rectifying diodes of the second group being connected with the positive and negative connection of the front and rear plugs respectively; and

the at least one LED serial set connected between the negative ends of the rectifying diodes of the first group and the positive ends of the rectifying diodes of the second group.

2. The LED lighting chain of claim 1, further comprising a voltage-reducing device operably connected between the at least one LED serial set and the positive ends of the rectifying diodes of the second group.

3. The LED lighting chain of claim 2, wherein the voltage reducing device comprises a resistor in series with a capacitor.

4. The LED lighting chain of claim 2, wherein the voltage reducing device and the two rectifying diodes of the second group are contained in packaging for the rear plug and the two rectifying diodes of the first group are contained packaging for the front plug.

5. The LED lighting chain of claim 1, further comprising a plurality of LED serial sets connected in parallel between the negative ends of the rectifying diodes of the first group and the positive ends of the rectifying diodes of the second group.

6. The LED lighting chain of claim 1, wherein the front plug comprises a common household plug connector configured to be connected to a supply voltage.

7. The LED lighting chain of claim 6, wherein the supply voltage is 110 volts.

8. The LED lighting chain of claim 6, wherein the supply voltage is 220 volts.

9. The LED lighting chain of claim 6, wherein the rear plug comprises a common household socket connector, said socket electrically coupled in parallel to the front plug, enabling a plurality of LED lighting chains to be connected to each other from end to end.

10. The LED lighting chain of claim 9, wherein the rear plug comprises a dummy plug, said dummy plug coupled in parallel to the front plug.

11. An LED lighting chain, comprising:

a first half of a bridge rectifier comprising two rectifying diodes with negative ends connected in parallel;

a second half of a bridge rectifier comprising two rectifying diodes with positive ends connected in parallel;

a first plug having at least a positive and a negative connection and comprising the first half of the bridge rectifier with the negative ends of the rectifying diodes connected to at least one LED string and the positive ends of the rectifying diodes connected to the positive connection of the first plug and a negative connection of a second plug;

the second plug, having at least a positive and the negative connection and comprising the second half of the bridge rectifier with the positive ends of the rectifying diodes connected to at least one LED string and the negative ends of the rectifying diodes connected to the negative connection of the first plug and the positive connection of the second plug;

the LED lighting chain enabling parallel connection of at least one additional lighting chain via the second plug, with the second plug wired parallel to the first plug.

12. The LED lighting chain of claim 11, further comprising a voltage-reducing device operably connected between the at least one LED string and the positive ends of the rectifying diodes in the second half of the bridge rectifier.

13. The LED lighting chain of claim 12, wherein the voltage-reducing device comprises a resistor in series with a capacitor.

14. The LED lighting chain of claim 11, further comprising a plurality of LED strings connected in parallel between the negative ends of the rectifying diodes in the first half of the bridge rectifier of the first plug and the positive ends of the rectifying diodes in the second half of the bridge rectifier of the second plug.

15. The LED lighting chain of claim 11, wherein the first plug comprises a common household plug connector configured to be connected to a supply voltage.

16. The LED lighting chain of claim 15, wherein the supply voltage is 110 volts.

17. The LED lighting chain of claim 15, wherein the supply voltage is 220 volts.

18. The LED lighting chain of claim 11, wherein the second plug comprises a common household socket connector configured to be connected to a common household plug connector.

19. The LED lighting chain of claim 18, wherein the second plug comprises a dummy plug, said dummy plug electrically coupled in parallel to the first plug.