Light-emitting systems

• US 9,070,573 B2
• Filed: 10/29/2010
• Issued: 06/30/2015
• Est. Priority Date: 10/07/2005
• Status: Active Grant

• Current Assignee: Epistar Corporation
• Original Assignee: Epistar Corporation
• Inventors: Yeh, Wen-Yung, Yu, Yu-Chen, Yen, Hsi-Hsuan, Lin, Jui-Ying
• Primary Examiner(s): Niu, Xinning
• Application Number:
  US12/915,420
• Publication Number:
  US 20110038157A1
• Time in Patent Office: 1,705 Days
• Field of Search: 315/294
• US Class Current: 1/1
• CPC Class Codes: F21K 9/00 Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
• CPC Class Codes: H01L 25/0753 the devices being arranged next to each other
• CPC Class Codes: H01L 25/167 comprising optoelectronic devices, e.g. LED, photodiodes
• CPC Class Codes: H01L 27/15 including semiconductor components having potential barriers, specially adapted for light emission
• 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 2924/0002 Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
• CPC Class Codes: H01L 33/36 characterised by the electrodes
• 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

Abstract

A light-emitting system comprises: a first power input terminal and a second power input terminal; an insulating substrate; a first light-emitting-diode string formed on the insulating substrate comprising at least three light-emitting diodes placed sequentially in a first direction to allow a current flow through the at least three light-emitting diodes of the first light-emitting-diode string generally in the first direction; a second light-emitting-diode string formed on the insulating substrate comprising at least three light-emitting diodes placed sequentially in a second direction to allow a current flow through the at least three light-emitting diodes of the second light-emitting-diode string generally in the second direction; a third light-emitting-diode string comprising at least three light-emitting diodes placed sequentially in a third direction to allow a current flow through the at least three light-emitting diodes of the third light-emitting-diode string generally in the third direction.

Claims

1. A light-emitting system comprising:

a first power input terminal and a second power input terminal for receiving an external power input to the light-emitting system;

an insulating substrate;

a first light-emitting-diode string formed on the insulating substrate comprising at least three light-emitting diodes placed sequentially in a first direction to allow a current flow through the at least three light-emitting diodes of the first light-emitting-diode string generally in the first direction;

a second light-emitting-diode string formed on the insulating substrate comprising at least three light-emitting diodes placed sequentially in a second direction to allow a current flow through the at least three light-emitting diodes of the second light-emitting-diode string generally in the second direction; and

a third light-emitting-diode string comprising at least three light-emitting diodes placed sequentially in a third direction to allow a current flow through the at least three light-emitting diodes of the third light-emitting-diode string generally in the third direction;

wherein the first light-emitting-diode string, the second light-emitting-diode string and the third light-emitting-diode string are serially coupled between the first power input terminal and the second power input terminal, and the first direction is substantially perpendicular to the second direction, wherein the light-emitting diodes in the same string are separated from one another and electrically connected to one another through a plurality of conductors, and the second light-emitting-diode string and the third light-emitting-diode string are arranged in a non-parallel manner.

2. A light-emitting system of claim 1, wherein the first power input terminal, the second power input terminal, the first light-emitting-diode string, and the second light-emitting-diode string belong to a bridge rectifying light-emitting system.

3. A light-emitting system of claim 1, wherein at least one of the at least three light-emitting diodes in the first light-emitting-diode string and the at least three light-emitting diodes in the second light-emitting-diode string comprises micro diodes.

4. A light-emitting system of claim 1, wherein the second light-emitting-diode string is arranged substantially in a direction perpendicular to the third light-emitting-diode string.

5. A light-emitting system of claim 1, wherein the first light-emitting-diode string and the third light-emitting-diode string are arranged in substantially opposite directions.

13. A light-emitting system of claim 1, wherein the first light-emitting-diode string and the second light-emitting-diode string belong to a first bridge rectifier configuration, the third light-emitting diode string belongs to a second bridge rectifier configuration, and the first bridge rectifier configuration and the second bridge rectifier configuration are electrically serially connected.

14. A light-emitting system of claim 1, wherein the first power input terminal, the second power input terminal, the first light-emitting-diode string, and the second light-emitting-diode string belong to a single-chip system.

6. A light-emitting system comprising:

an insulating substrate;

a first power input terminal and a second power input terminal for receiving an external power input to the light-emitting system formed on the insulating substrate;

a first light-emitting-diode string formed on the insulating substrate comprising at least three light-emitting diodes arranged in a first direction to allow a current flow through the at least three light-emitting diodes of the first light-emitting-diode string generally in the first direction;

a second light-emitting-diode string formed on the insulating substrate comprising at least three light-emitting diodes arranged in a second direction to allow a current flow through the at least three light-emitting diodes of the second light-emitting-diode string generally in the second direction; and

a third light-emitting-diode string comprising at least three light-emitting diodes arranged in a third direction to allow a current flow through the at least three light-emitting diodes of the first light-emitting-diode string generally in the third direction,

wherein the first light-emitting-diode string, the second light-emitting-diode string and the third light-emitting-diode string are serially coupled between the first power input terminal and the second power input terminal, and the first light-emitting-diode string and the second light-emitting-diode string are arranged in non-parallel directions, and the second light-emitting-diode string and the third light-emitting-diode string are arranged in non-parallel directions, wherein the light-emitting diodes in the same string are separated from one another and electrically connected to one another through a plurality of conductors.

7. A light-emitting system of claim 6, wherein the first power input terminal, the second power input terminal, the first light-emitting-diode string, and the second light-emitting-diode string belong to a bridge rectifying light-emitting system.

8. A light-emitting system of claim 6, wherein the first light-emitting-diode string is arranged substantially in a direction perpendicular to the second light-emitting-diode string.

9. A light-emitting system of claim 6, wherein at least one of the at least three light-emitting diodes in the first light-emitting-diode string and the at least three light-emitting diodes in the second light-emitting-diode string comprise micro diodes.

10. A light-emitting system of claim 6, wherein the second light-emitting-diode string is arranged substantially in a direction perpendicular to the third light-emitting-diode string.

11. A light-emitting system of claim 6, wherein the first light-emitting-diode string and the third light-emitting-diode string are arranged in substantially opposite directions.

12. A light-emitting system of claim 11, wherein the first light-emitting-diode string and the second light-emitting-diode string belong to a first bridge rectifier configuration, the third light-emitting diode string belongs to a second bridge rectifier configuration, and the first bridge rectifier configuration and the second bridge rectifier configuration are electrically serially connected.