Liquid crystal display device and method of making the same

• US 7,903,226 B2
• Filed: 01/16/2007
• Issued: 03/08/2011
• Est. Priority Date: 01/26/2006
• Status: Active Grant

• Current Assignee: NLT Technologies, Ltd.
• Original Assignee: NEC LCD Technologies Limited (NEC Corporation)
• Inventors: Yuge, Kazuyuki
• Primary Examiner(s): Nelms; David
• Assistant Examiner(s): Briggs; Nathanael R
• Application Number:
  US11/653,259
• Publication Number:
  US 20070171354A1
• Time in Patent Office: 1,512 Days
• Field of Search: 349/161
• US Class Current: 349/161
• CPC Class Codes: G02F 1/133385 with cooling means, e.g. fans
• CPC Class Codes: G02F 1/1345 Conductors connecting electrodes to cell terminals
• CPC Class Codes: G02F 1/13454 Drivers integrated on the active matrix substrate G02F1/136277 takes precedence
• CPC Class Codes: H05K 1/0203 Cooling of mounted components H05K1/0272 takes precedence
• CPC Class Codes: H05K 3/361 Assembling flexible printed circuits with other printed circuits

Abstract

Disclosed are a liquid crystal display device 10 and a method of making such liquid crystal display device that improves display quality by providing heat dissipation pattern 4 for effectively dissipating heat generated by the driver ICs 2. The heat dissipation pattern 4 is formed on a glass substrate of a liquid crystal panel 1 along one side thereof so as to minimize non-uniform thermal distribution on the liquid crystal panel 1 at locations adjacent to and distant from the driver ICs 2.

Claims

1. A liquid crystal display device having a generally rectangular liquid crystal panel and a circuit board connected to the liquid crystal panel on at least one side thereof, comprising:

driver ICs mounted on a glass substrate of the liquid crystal panel at a spaced relationship along the one side for driving the liquid crystal panel; and

discrete heat dissipation patterns formed on the glass substrate of the liquid crystal panel, the heat dissipation patterns being spaced from each other and adjacent to the driver ICs for conducting heat generated by the driver ICs, a first of the heat dissipation patterns located at a first side of one of the driver ICs, and a second of the heat dissipation patterns located at an opposite second side of the one of the driver ICs.

2. The liquid crystal display device of claim 1, wherein the heat dissipation patterns are in the form of films of a thermally conductive material.

3. The liquid crystal display device of claim 1, wherein the heat dissipation patterns are made from a same material as an array of the liquid crystal panel.

4. The liquid crystal display device of claim 1,

wherein the heat dissipation patterns are made of a heat conductive electrically conductive material, and

wherein a fixed potential is applied to the heat dissipation patterns.

5. The liquid crystal display device of claim 1, wherein the heat dissipation patterns are formed in such a manner to connect adjacent driver ICs.

6. The liquid crystal display device of claim 1, wherein the heat dissipation patterns are formed in such a manner to be connected to the circuit board.

7. The liquid crystal display device of claim 1, wherein the heat dissipation patterns are formed in such a manner to connect adjacent ICs and the circuit board.

8. The liquid crystal display device of claim 1, wherein a wiring pattern for the driver ICs is formed by way of an insulation layer underneath the heat dissipation patterns.

9. A liquid crystal display device having a generally rectangular liquid crystal panel and a circuit board connected to the liquid crystal panel on at least one side thereof, comprising:

driver ICs for driving the liquid crystal panel, the driver ICs mounted at a spaced relationship on a glass substrate of the liquid crystal panel; and

a plurality of discrete and separate heat dissipation patterns formed on the glass substrate of the liquid crystal panel, the heat dissipation patterns being spaced from each other and each heat dissipation pattern being adjacent to a driver IC for conducting heat generated by the driver ICs,

wherein a first heat dissipation pattern and a second heat dissipation pattern are located, respectively, at a first side and an opposite second side of one of the driver ICs.

10. The liquid crystal display device of claim 9, wherein the heat dissipation patterns are directly connected to adjacent driver ICs.

11. The liquid crystal display device of claim 9, wherein the heat dissipation patterns are directly connected to the circuit board.

12. The liquid crystal display device of claim 9, wherein the heat dissipation patterns are directly connected to adjacent driver ICs and directly connected to the circuit board.

13. The liquid crystal display device of claim 9, wherein the heat dissipation patterns are formed of a film of thermally conductive material.

14. The liquid crystal display device of claim 9, wherein the heat dissipation patterns are made from a same material as an array of the liquid crystal panel.

15. The liquid crystal display device of claim 9, wherein the heat dissipation patterns are made of a heat conductive electrically conductive material.

16. The liquid crystal display device of claim 15, wherein a fixed potential is applied to the heat dissipation patterns.

17. The liquid crystal display device of claim 9, wherein a wiring pattern of the driver ICs is formed by way of an insulation layer underneath the heat dissipation patterns.