Light emitting device for AC operation

• US 8,129,917 B2
• Filed: 09/05/2007
• Issued: 03/06/2012
• Est. Priority Date: 11/20/2006
• Status: Expired due to Fees

• Current Assignee: Seoul Viosys Co., Ltd. (Seoul Semiconductor Co., Ltd.)
• Original Assignee: Seoul Optodevice Company Limited (Seoul Semiconductor Co., Ltd.)
• Inventors: Kim, Dae Won, Kal, Dae Sung
• Primary Examiner(s): Vu, David Hung
• Application Number:
  US12/442,800
• Publication Number:
  US 20100072905A1
• Time in Patent Office: 1,644 Days
• Field of Search: 315/246, 315/250, 315/291, 315/307, 315/312, 315/251, 257/88, 257/99
• US Class Current: 315/246
• CPC Class Codes: H01L 2224/24137 the bodies being arranged next to each other, e.g. on a common substrate
• CPC Class Codes: H01L 2224/48137 the bodies being arranged next to each other, e.g. on a common substrate
• CPC Class Codes: H01L 2224/49107 on the semiconductor or solid-state body
• CPC Class Codes: H01L 27/153 in a repetitive configuration, e.g. LED bars
• CPC Class Codes: H05B 45/42 Antiparallel configurations

Abstract

An AC light emitting device is disclosed. The AC light emitting device includes at least four substrates. Serial arrays each of which has a plurality of light emitting cells connected in series are positioned on the substrates, respectively. Meanwhile, first connector means electrically connect the serial arrays formed on respective different substrates. At least two array groups each of which has at least two of the serial arrays connected in series by the first connector means are formed. The at least two array groups are connected in reverse parallel to operate. Accordingly, there is provided an AC light emitting device capable of being driven under an AC power source.

Claims

1. An alternating current (AC) light emitting device, comprising:

at least two substrates;

a first serial array and a second serial array positioned on each of the substrates, the first serial array and the second serial array being connected in reverse parallel to each other, each of the first serial array and the second serial array comprising a plurality of light emitting cells connected in series, the first serial array and the second serial array configured to be driven by an AC voltage;

first wires for electrically connecting serial arrays to each other on the respective different substrates, thereby forming at least two array groups; and

second wires respectively formed on the substrates to electrically connect the light emitting cells corresponding to each other provided in the first serial array and the second serial array.

2. The AC light emitting device as claimed in claim 1, wherein the first wires comprise bonding wires for connecting the serial arrays on the respective different substrates.

3. The AC light emitting device as claimed in claim 2, wherein the first wires comprise lead electrodes in a package.

4. The AC light emitting device as claimed in claim 1, further comprising:

a first bonding pad and a second bonding pad positioned on each of the substrates,

wherein the first serial array and the second serial array are connected in reverse parallel to each other between the first and second bonding pads.

5. The AC light emitting device as claimed in claim 4, wherein a first wire among the first wires electrically connects the first bonding pad of one of the at least two substrates to the second bonding pad of the other of the at least two substrates.