Light string having alternating current light-emitting diodes

• US 20070008721A1
• Filed: 07/08/2005
• Published: 01/11/2007
• Est. Priority Date: 07/08/2005
• Status: Abandoned Application

• Current Assignee: Baycom Opto-Electronics Technology Co., Ltd. (Tecom Company Limited)
• Original Assignee: Baycom Opto-Electronics Technology Co., Ltd. (Tecom Company Limited)
• Inventors: Peng, Chi-Tsung, Wen, Kuo-Hsiang
• Application Number:
  US11/176,649
• Publication Number:
  US 20070008721A1
• Time in Patent Office: Days
• US Class Current: 362/227
• CPC Class Codes: F21S 4/10 with light sources attached to loose electric cables, e.g. Christmas tree lights
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

A light string has a pair of wires and a plurality of alternating current light-emitting diodes (AC LEDs). The pair of wires is arranged to provide an AC voltage. Each of the AC LEDs is electrically connected in parallel between the pair of wires. The light string can decrease the manufacturing cost, reduce the space occupied by additional circuitry, and lower heat produced thereby for enhancing the operational safety of long-term use.

Claims

1. A light string, comprising:

a pair of wires for providing a alternating current (AC) voltage; and

a plurality of alternating current light-emitting diodes (AC LEDs), wherein each of the AC LEDs is electrically connected in parallel between the pair of wires.

2. The light string of claim 1, wherein the light string further comprises a power plug electrically connected to the pair of wires, for plugging into a wall-plug power socket to provide the AC voltage.

3. The light string of claim 1, wherein a voltage of the AC voltage is between about 100 volts and 240 volts, and a frequency of the AC voltage is greater than about 50 hertz.

4. The light string of claim 1, wherein the AC LEDs have a single color.

5. The light string of claim 1, wherein the AC LEDs have a plurality of colors.

6. The light string of claim 5, wherein the AC LEDs are arranged in color order along with the pair of wires.

7. The light string of claim 5, wherein the AC LEDs are not arranged in color order.

8. The light string of claim 1, wherein the AC LEDs are adapted to a wall-plug AC voltage.

9. A light string, comprising:

a main pair of wires for providing an AC voltage; and

a plurality of secondary light strings, each of the secondary light strings comprising;

a secondary pair of wires, wherein each wire of the secondary pair of wires is connected to one wire of the main pair of wires, respectively; and

a plurality of AC LEDs, wherein each of the AC LEDs is electrically connected in parallel between the secondary pair of wires.

10. The light string of claim 9, wherein the light string further comprises a power plug electrically connected to the pair of wires, for coupling to a wall-plug power socket to provide the AC voltage.

11. The light string of claim 9, wherein a voltage of the AC voltage is between about 100 volts and 240 volts, and a frequency of the AC voltage is greater than about 50 hertz.

12. The light string of claim 9, wherein the AC LEDs have a single color.

13. The light string of claim 9, wherein the AC LEDs have a plurality of colors.

14. The light string of claim 13, wherein the AC LEDs of one secondary light string are of a single color.

15. The light string of claim 14, wherein the secondary light strings are arranged in color order along with the main pair of wires.

16. The light string of claim 14, wherein the secondary light strings are not arranged in color order.

17. The light string of claim 13, wherein the AC LEDs of each of the secondary light strings have a plurality of colors, and the AC LEDs of one secondary light string are arranged in color order along with the secondary pair of wires.

18. The light string of claim 13, wherein the AC LEDs of each of the secondary light strings have a plurality of colors, and the AC LEDs of one secondary light string are not arranged in color order.

19. The light string of claim 9, wherein the AC LEDs are adapted to a wall-plug AC voltage.