OPERATING SYSTEM AND METHOD OF LIGHT EMITTING DEVICE

• US 20080036713A1
• Filed: 08/09/2007
• Published: 02/14/2008
• Est. Priority Date: 08/10/2006
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Park, Jun
• Granted Patent: US 8,358,257 B2
• Time in Patent Office: Days
• US Class Current: 345/82
• 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: H05B 45/18 using temperature feedback

Abstract

An operating system for estimating thermal property of a light emitting device to operate the light emitting device, and an operating method thereof are disclosed. The operating system of a light emitting device includes a light emitting device package and a driving unit to drive the light emitting device package at frequency equal to or higher than 100 Hz.

Claims

1. An operating system of a light emitting device comprising:

a light emitting device package; and

a driving unit to drive the light emitting device package at frequency equal to or higher than 100 Hz.

2. The operating system of a light emitting device according to claim 1, wherein the light emitting device package comprises:

a light emitting device chip; and

a heat sink contacting the light emitting device chip.

3. The operating system of a light emitting device according to claim 2, further comprising a solder ball, and an epoxy positioned between the light emitting device chip and the heat sink.

4. The operating system of a light emitting device according to claim 2, further comprising an encapsulant and a lens disposed in the upper side of the light emitting device chip.

5. The operating system of a light emitting device according to claim 2, wherein the light emitting device chip comprises one of light emitting devices based on GaAs, InP, InGaP, and GaN.

6. The operating system of a light emitting device according to claim 1, wherein the driving unit performs a duty operation.

7. The operating system of a light emitting device according to claim 1, wherein the driving unit drives the light emitting device package at frequency equal to or less than 2 KHz.

8. The operating system of a light emitting device according to claim 1, wherein an error of a junction temperature of the light emitting device is within 10%.

9. The operating system of a light emitting device according to claim 1, wherein the number of the light emitting device package is plural.

10. The operating system of a light emitting device according to claim 9, wherein the light emitting device packages are arranged in a panel having a predetermined area.

11. An operating system of a light emitting device comprising:

a plurality of light emitting devices; and

a driving unit to drive the light emitting devices at frequency equal to or higher than 100 Hz.

12. The operating system of a light emitting device according to claim 11, wherein the plural light emitting devices emit full colored light.

13. The operating system of a light emitting device according to claim 11, wherein the driving unit performs a duty operation.

14. The operating system of a light emitting device according to claim 11, wherein the driving unit the light emitting devices at frequency equal to or less than 2 KHz.

15. The operating system of a light emitting device according to claim 11, wherein each of the light emitting devices comprises one of light emitting devices based on GaAs, InP, InGaP, and GaN.

16. A method of driving a light emitting device comprising at least one light emitting device package, comprising:

driving the light emitting device package at frequency equal to or higher than 100 Hz.

17. The method of driving a light emitting device according to claim 16, wherein the frequency is equal to or less than 2 KHz.

18. The method of driving a light emitting device according to claim 16, wherein the light emitting device package is driven under a duty operation.