LIQUID CRYSTAL DISPLAY DEVICE AND METHOD OF MANUFACTURING THE SAME

• US 20110096280A1
• Filed: 09/17/2010
• Published: 04/28/2011
• Est. Priority Date: 10/27/2009
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Na, Hye-Seok, Baek, Seung-Soo, Cho, Se-Hyoung, KI, DONG-HYEON, Kim, Dong-Gyu, Jung, Mee-Hye
• Granted Patent: US 8,294,866 B2
• Time in Patent Office: Days
• US Class Current: 349/143
• CPC Class Codes: G02F 1/133512 Light shielding layers, e.g. black matrix G02F1/136209 takes precedence
• CPC Class Codes: G02F 1/134336 Matrix
• CPC Class Codes: G02F 1/134345 Subdivided pixels, e.g. for grey scale or redundancy
• CPC Class Codes: G02F 1/13606 having means for reducing parasitic capacitance
• CPC Class Codes: G02F 2201/40 Arrangements for improving the aperture ratio
• CPC Class Codes: H01L 27/124 with a particular composition, shape or layout of the wiring layers specially adapted to the circuit arrangement, e.g. scanning lines in LCD pixel circuits wiring structures per se H01L23/52
• CPC Class Codes: H01L 27/1248 with a particular composition or shape of the interlayer dielectric specially adapted to the circuit arrangement

Abstract

Disclosed are a liquid crystal display device and a method of manufacturing the liquid crystal display device. The liquid crystal display device includes a first insulating substrate, a gate line and a data line formed on the first insulating substrate and crossing each other, a first pixel electrode formed on the first insulating substrate and including a first part and a second part which are physically separated, a second pixel electrode formed on the first insulating substrate and forming an electric field with the first pixel electrode, a connection bridge including at least one conductive layer and electrically connecting the first part with the second part through a contact hole, and at least one insulating layer positioned between the first pixel electrode and the connection bridge, wherein the contact hole is formed in the at least one insulating layer.

Claims

1. A liquid crystal display device, comprising:

a first insulating substrate;

a gate line and a data line formed on the first insulating substrate and crossing each other;

a first pixel electrode formed on the first insulating substrate and including a first part and a second part which are physically separated;

a second pixel electrode formed on the first insulating substrate and forming an electric field with the first pixel electrode;

a connection bridge including at least one conductive layer and electrically connecting the first part with the second part through a contact hole; and

at least one insulating layer positioned between the first pixel electrode and the connection bridge, wherein the contact hole is formed in the at least one insulating layer.

2. The liquid crystal display device of claim 1, wherein the data line includes a first data line and a second data line, wherein the first part is capacitively coupled to the first data line and the second part is capacitively coupled to the second data line.

3. The liquid crystal display device of claim 2, wherein the second pixel electrode is capacitively coupled to both the first data line and the second data line.

4. The liquid crystal display device of claim 3, wherein the second pixel electrode is physically one body.

5. The liquid crystal display device of claim 3, wherein a capacitance between the first pixel electrode and the first data line is substantially the same as a capacitance between the second pixel electrode and the first data line, and a capacitance between the first pixel electrode and the second data line is substantially the same as a capacitance between the second pixel electrode and the second data line.

6. The liquid crystal display device of claim 1, wherein the contact hole includes a first contact hole and a second contact hole, wherein the connection bridge is connected to the first part through the first contact hole and to the second part through the second contact hole, and wherein the first contact hole of a pixel and the second contact hole of a neighboring pixel are arranged in an extension direction of the data line.

7. The liquid crystal display device of claim 6, wherein the data line curves around the first contact hole of the pixel and the second contact hole of the neighboring pixel.

8. The liquid crystal display device of claim 1, further comprising:

a second insulating substrate facing the first insulating substrate;

a liquid crystal layer positioned between the first insulating layer and the second insulating layer; and

a vertical alignment layer formed on the pixel electrode.

9. The liquid crystal display device of claim 1, further comprising:

a first thin film transistor and a second thin film transistor formed at each pixel,

wherein a drain electrode of the first thin film transistor is electrically connected to the first pixel electrode through a second contact hole and the drain electrode of the second thin film transistor is electrically connected to the second pixel electrode through a third contact hole.

10. The liquid crystal display device of claim 9, further comprising:

a first common voltage line and a second common voltage line,

wherein a source electrode of one of the first thin film transistor and the second thin film transistor is alternately connected to the first common voltage line or the second common voltage line through a fourth contact hole for each pixel.

11. The liquid crystal display device of claim 10, wherein the fourth contact hole is located between the second contact hole and third contact hole.

12. The liquid crystal display device of claim 1, wherein the second pixel electrode crosses the connection bridge at least one part and includes at least one protrusion part extending at the crossing part in an extension direction of the connection bridge.

13. The liquid crystal display device of claim 12, wherein a majority portion of the protrusion part is wider than the connection bridge.

14. A method of manufacturing a liquid crystal display device, comprising:

forming a connection bridge including at least one conductive layer on a first insulating substrate;

forming an insulating layer having a first contact hole and a second contact hole on the connection bridge and the first insulating substrate; and

forming a pixel electrode including a first pixel electrode, including a first part and a second part which are physically separated, and a second pixel electrode physically separated from the first pixel electrode, on the insulating layer,

wherein the first part and the second part are electrically connected to the connection bridge through the first contact hole and the second contact hole.

15. The method of claim 14, wherein the second pixel electrode is physically one body.

16. The method of claim 14, further comprising:

forming a data line including a first data line and a second data line;

wherein the first part is capacitively coupled to the first data line and the second part is capacitively coupled to the second data line and the second pixel electrode is capacitively coupled to both the first data line and the second data line.

17. The method of claim 16, wherein a capacitance between the first pixel electrode and the first data line is substantially the same as a capacitance between the second pixel electrode and the first data line, and a capacitance between the first pixel electrode and the second data line is substantially the same as a capacitance between the second pixel electrode and the second data line.

18. The method of claim 16, wherein forming the connection bridge and forming the data line are simultaneously performed.

19. The method of claim 16, further comprising:

forming another insulating layer between the data line and the pixel electrode.