Light source apparatus and liquid crystal display having the same

• US 7,936,415 B2
• Filed: 08/08/2007
• Issued: 05/03/2011
• Est. Priority Date: 08/24/2006
• Status: Active Grant

• Current Assignee: Suzhou Lekin Semiconductor Company Limited
• Original Assignee: LG Innotek Company Limited (LG Corporation)
• Inventors: Park, Jun Seok
• Primary Examiner(s): WONG, TINA MEI SENG
• Application Number:
  US11/996,256
• Publication Number:
  US 20100134711A1
• Time in Patent Office: 1,364 Days
• Field of Search: None
• US Class Current: 349/58
• CPC Class Codes: G02F 1/133603 with LEDs
• CPC Class Codes: G02F 1/133612 Electrical details
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 2224/48247 connecting the wire to a bond pad of the item
• 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

Abstract

Disclosed is a light source apparatus and a liquid crystal display having the same. The light source apparatus comprises a housing comprising a receiving groove, at least one module substrate which is received in the housing and has connecting terminals mounted at both side ends of the module substrate, a light emitting diode mounted on the module substrate, and a connecting substrate connected to the connecting terminal of the module substrate.

Claims

1. A light source apparatus comprising:

at least one module substrate comprising connecting terminals at both side ends thereof;

a light emitting diode on the module substrate; and

a plurality of connecting substrates connected to the connecting terminals of the module substrate,

wherein the connecting substrate comprises a termination connecting substrate, by which the connecting terminal provided at one end of a final module substrate of the module substrates is prepared as a closed loop circuit.

2. The light source apparatus as claimed in claim 1, wherein the connecting substrate comprises an intermediate connecting substrate connecting the connecting terminals of adjacent module substrates to each other.

3. The light source apparatus as claimed in claim 1, wherein the connecting substrate comprises an external connecting substrate which is disposed at a first end of a first module substrate of the module substrates, and an intermediate connecting substrate which connects the connecting terminal of the first module substrate with the external connecting substrate and/or between the connecting terminal of the module substrates.

4. The light source apparatus as claimed in claim 3, wherein the connecting substrate comprises a connecting terminal, which corresponds to at least one of connecting terminals provided at both side ends of the module substrate.

5. The light source apparatus as claimed in claim 3, wherein the external connecting substrate comprises an external connector to which a light emitting diode driver is connected.

6. The light source apparatus as claimed in claim 4, wherein the connecting terminal is formed on the module substrate or under the module substrate, and the intermediate connecting substrate is mounted on the external connecting substrate and on the connecting terminals between plural module substrates.

7. The light source apparatus as claimed in claim 1, wherein the light emitting diode comprises at least one LED chip having at least one color.

8. The light source apparatus as claimed in claim 1, wherein the module substrate comprises a single-layer printed circuit board or a multi-layer printed circuit board.

9. The light source apparatus as claimed in claim 1, wherein the module substrate comprises a multi-copper layer and a via hole formed in the module substrate, and a silver plating layer formed on a bottom surface of the module substrate.

10. The light source apparatus as claimed in claim 7, wherein the module substrate includes a test pad terminal for testing the LED chip.

11. The light source apparatus as claimed in claim 1, wherein the module substrate comprises white ink coated on the module substrate, except for a region where the LED chip is mounted.

12. A light source apparatus comprising:

a housing comprising a receiving groove;

at least one module substrate which is received in the housing and has connecting terminals mounted at both side ends of the module substrate;

a light emitting diode on the module substrate; and

a connecting substrate connected to the connecting terminal of the module substrate,

wherein the connecting substrate comprises a termination connecting substrate, which allows a connecting terminal provided at one end of a final module substrate of the module substrates to be feedback in a form of a closed loop.

13. The light source apparatus as claimed in claim 12, wherein the connecting substrate comprises an external connecting substrate, which is provided at one end of a first module substrate of the module substrates to supply a driving power.

14. The light source apparatus as claimed in claim 13, wherein the connecting substrate comprises a plurality of intermediate connecting substrates which connect both connecting terminals of a plurality of module substrates and/or between the external connecting substrate and the first connecting terminal of the first module substrate.

15. The light source apparatus as claimed in claim 12, comprising at least one LED bar, on which the module substrates are connected to each other in series by the connecting substrate.

16. A liquid crystal display comprising:

a liquid crystal panel; and

a light unit disposed below the liquid crystal panel,

wherein the light unit comprises a housing comprising a receiving groove, at least one module substrate which is received in the housing and has a first connecting terminal and a second connecting terminal at both end portions of the module substrate, a light emitting diode on the module substrate, and a connecting substrate which is connected to the first connecting terminal of a first end of the module substrate or the second connecting terminal of a second end of the module substrate,

wherein the connecting substrate comprises a termination connecting substrate which comprises a closed loop pattern for forming a second connecting terminal of a second end of a final module substrate as a closed loop circuit.

17. The liquid crystal display as claimed in claim 16, wherein the connecting substrate comprises:

an external connecting substrate for external connection; and

at least one intermediate connecting substrate comprising a third connecting terminal which connects the external connecting substrate with the first connecting terminal of the first module substrate and/or between the connecting terminals of module substrates.

18. The liquid crystal display as claimed in claim 17, wherein one of the module substrate, the external connecting substrate, the intermediate substrate and the termination substrate comprises a flexible substrate.