Light Emitting Device with Light Emitting Cells Arrayed

• US 20080218098A1
• Filed: 12/05/2006
• Published: 09/11/2008
• Est. Priority Date: 12/16/2005
• Status: Active Grant

• Current Assignee: Seoul Viosys Co., Ltd. (Seoul Semiconductor Co., Ltd.)
• Original Assignee: Seoul Optodevice Company Limited (Seoul Semiconductor Co., Ltd.)
• Inventors: Lee, Jae Ho, Yoon, Yeo Jin, Hwang, Eu Jin, Yves, Lacroix
• Granted Patent: US 8,054,002 B2
• Time in Patent Office: Days
• US Class Current: 315/250
• CPC Class Codes: H01L 2224/37099 Material
• CPC Class Codes: H01L 2224/371 with a principal constituent of the material being a metal or a metalloid, e.g. boron [B], silicon [Si], germanium [Ge], arsenic [As], antimony [Sb], tellurium [Te] and polonium [Po], and alloys thereof
• CPC Class Codes: H01L 2224/40137 the bodies being arranged next to each other, e.g. on a common substrate
• CPC Class Codes: H01L 2224/84 using a strap connector
• CPC Class Codes: H01L 24/36 Structure, shape, material or disposition of the strap connectors prior to the connecting process
• CPC Class Codes: H01L 24/37 of an individual strap connector
• CPC Class Codes: H01L 24/40 of an individual strap connector
• CPC Class Codes: H01L 27/156 two-dimensional arrays
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/00014 the subject-matter covered by the group, the symbol of which is combined with the symbol of this group, being disclosed without further technical details
• CPC Class Codes: H01L 2924/12041 LED
• CPC Class Codes: H01L 33/62 Arrangements for conducting electric current to or from the semiconductor body, e.g. lead-frames, wire-bonds or solder balls
• CPC Class Codes: H05B 45/00 Circuit arrangements for operating light-emitting diodes [LED]
• CPC Class Codes: H05B 45/37 Converter circuits
• CPC Class Codes: H05B 45/40 Details of LED load circuits
• CPC Class Codes: Y02B 20/30 Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

Abstract

The present invention relates to a light emitting device. The light emitting device according to the present invention comprises a light emitting cell block having a plurality of light emitting cells; and a bridge rectifying circuit connected to input and output terminals of the light emitting cell block, wherein the bridge rectifying circuit includes a plurality of diodes between nodes. In manufacturing an AC light emitting device with a bridge rectifying circuit built therein, the present invention can provide a light emitting device capable of enhancing the reliability and luminance of the light emitting device by setting the size of diodes of the bridge rectifying circuit to be a certain size and controlling the number thereof.

Claims

1. A light emitting device, comprising:

a light emitting cell block having a plurality of light emitting cells; and

a bridge rectifying circuit connected to input and output terminals of the light emitting cell block, wherein the bridge rectifying circuit includes a plurality of diodes between nodes.

2. The light emitting device as claimed in claim 1, wherein the number of the plurality of diodes is 100 to 200% of that of the light emitting cells within the light emitting cell block.

3. The light emitting device as claimed in claim 1, wherein the number of the plurality of diodes is 100 to 130% of that of the light emitting cells within the light emitting cell block.

4. The light emitting device as claimed in claim 1, wherein size of each diode is 80% or less of that of the light emitting cell.

5. The light emitting device as claimed in claim 1, wherein the light emitting cell block and the bridge rectifying circuit are formed on the same substrate.

6. The light emitting device as claimed in claim 1, wherein at least one light emitting diode is included in the plurality of diodes.

7. The light emitting device as claimed in claim 1, wherein the plurality of diodes included in the bridge rectifying circuit are arrayed to surround the light emitting cell block.

8. The light emitting device as claimed in claim 7, wherein at least two electrodes constituting each of the nodes are positioned within the array of the plurality of diodes.

9. The light emitting device as claimed in claim 1, wherein the entire shape of the light emitting device is a quadrangle.

10. The light emitting device as claimed in claim 2, wherein at least one light emitting diode is included in the plurality of diodes.

11. The light emitting device as claimed in claim 2, wherein the plurality of diodes included in the bridge rectifying circuit are arrayed to surround the light emitting cell block.

12. The light emitting device as claimed in claim 2, wherein the entire shape of the light emitting device is a quadrangle.

13. The light emitting device as claimed in claim 3, wherein at least one light emitting diode is included in the plurality of diodes.

14. The light emitting device as claimed in claim 3, wherein the plurality of diodes included in the bridge rectifying circuit are arrayed to surround the light emitting cell block.

15. The light emitting device as claimed in claim 3, wherein the entire shape of the light emitting device is a quadrangle.

16. The light emitting device as claimed in claim 4, wherein at least one light emitting diode is included in the plurality of diodes.

17. The light emitting device as claimed in claim 4, wherein the plurality of diodes included in the bridge rectifying circuit are arrayed to surround the light emitting cell block.

18. The light emitting device as claimed in claim 4, wherein the entire shape of the light emitting device is a quadrangle.

19. The light emitting device as claimed in claim 5, wherein at least one light emitting diode is included in the plurality of diodes.

20. The light emitting device as claimed in claim 5, wherein the plurality of diodes included in the bridge rectifying circuit are arrayed to surround the light emitting cell block.

21. The light emitting device as claimed in claim 5, wherein the entire shape of the light emitting device is a quadrangle.