LIGHT EMITTING DEVICE FOR AC OPERATION

• US 20100072905A1
• Filed: 09/05/2007
• Published: 03/25/2010
• Est. Priority Date: 11/20/2006
• Status: Active Grant

• 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
• Granted Patent: US 8,129,917 B2
• Time in Patent Office: Days
• US Class Current: 315/192
• 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 AC light emitting device, comprising:

at least four substrates;

serial arrays respectively arranged on the substrates, each serial array comprising a plurality of light emitting cells connected in series; and

first wires for electrically connecting the serial arrays on the respective different substrates,

wherein at least two array groups are formed, each array group comprising at least two of the serial arrays connected in series by the first wires, and

wherein the at least two array groups are connected in reverse parallel.

2. The AC light emitting device as claimed in claim 1, further comprising at least a second wires for electrically connecting the first wires corresponding to each other provided in the array groups connected in reverse parallel, to thereby prevent overvoltage from being applied to a specific array in the array group to which reverse voltage is applied during operation.

3. The AC light emitting device as claimed in claim 2, further comprising bonding pads arranged on the respective substrates and electrically connected to both ends of each of the serial arrays, wherein the first wires connect the bonding pads.

4. The AC light emitting device as claimed in claim 3, wherein the first wires comprise bonding wires for directly connecting the bonding pads.

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

6. 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 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;

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 connected in reverse parallel.

7. The AC light emitting device as claimed in claim 6, wherein the first wires comprise bonding wires for connecting the serial arrays on the respective different substrates.

8. The AC light emitting device as claimed in claim 7, wherein the first wires comprise lead electrodes in a package.