LIQUID CRYSTAL DISPLAY DEVICE

• US 20150177579A1
• Filed: 12/22/2014
• Published: 06/25/2015
• Est. Priority Date: 12/23/2013
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: LIM, DongHun, YOU, JaeYong
• Granted Patent: US 10,162,228 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G02F 1/134336 Matrix
• CPC Class Codes: G02F 1/134363 for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS]
• CPC Class Codes: G02F 1/134372 for fringe field switching [FFS] where the common electrode is not patterned
• CPC Class Codes: G02F 1/136227 Through-hole connection of the pixel electrode to the active element through an insulation layer
• CPC Class Codes: G02F 1/1368 in which the switching element is a three-electrode device G02F1/136277 takes precedence

Abstract

A liquid crystal display device including first, second, and third data lines extending in a first direction on a substrate, the second data line positioned between the first and third data lines; a plurality of gate lines extending in a second direction on the substrate; at least one pixel unit including a first pixel electrode formed in a first pixel area between the first and third data lines intersecting the gate lines, at one side of a first gate line, and a second pixel electrode formed in a second pixel area between the first and third data lines, at another side of the first gate line; and at least one circuit unit formed between the first pixel area and the second pixel area and including a first transistor in which a first electrode of the first transistor is connected to the first data line and a second electrode of the first transistor is connected to the first pixel electrode, and a second transistor in which a third electrode of the first transistor is connected to the third data line and a fourth electrode of the first transistor is connected to the second pixel electrode.

Claims

1. A liquid crystal display device, comprising:

first, second, and third data lines extending in a first direction on a substrate, the second data line positioned between the first and third data lines;

a plurality of gate lines extending in a second direction on the substrate;

at least one pixel unit including a first pixel electrode formed in a first pixel area between the first and third data lines intersecting the gate lines, at one side of a first gate line, and a second pixel electrode formed in a second pixel area between the first and third data lines, at another side of the first gate line; and

at least one circuit unit formed between the first pixel area and the second pixel area and including a first transistor in which a first electrode of the first transistor is connected to the first data line and a second electrode of the first transistor is connected to the first pixel electrode, and a second transistor in which a third electrode of the first transistor is connected to the third data line and a fourth electrode of the first transistor is connected to the second pixel electrode.

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

fourth and fifth data lines,

wherein the at least one pixel unit includes a third pixel electrode formed in a third pixel area between the third and fifth data lines intersecting the gate lines, at the one side of the first gate line, and a fourth pixel electrode formed in a fourth pixel area between the third and fifth data lines, at the another side of the first gate line, and

wherein the first pixel electrode includes slits in a first diagonal direction for a first domain and the second pixel electrode includes slits in a second diagonal direction for a second domain.

3. The liquid crystal display device of claim 1, wherein the fourth data line is between the third and fifth data lines.

4. The liquid crystal display device of claim 1, wherein the slits in the first pixel electrode are symmetrical to the slits in the third pixel electrode.

5. The liquid crystal display device of claim 1, wherein angles of all of the slits in the first pixel electrode are positive and angles of all of the slits in the third pixel electrode are negative.

6. The liquid crystal display device of claim 1, wherein the slits in the first and third pixel electrodes are in third and fourth directions, respectively, in the substrate, and

wherein the first and second directions are vertical and horizontal, respectively, and the third and fourth directions are diagonal.

7. The liquid crystal display device of claim 6, wherein the slits in the first pixel electrode are symmetrical to the slits in the third pixel electrode.

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

a gate electrode formed on the substrate;

a gate insulation layer formed on the gate electrode, wherein the second electrode is formed on the gate insulation layer;

source and drain areas formed on the gate insulation layer on opposite sides of the second electrode; and

source and drain electrodes formed on the source and drain areas, respectively.

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

an inter-layer insulation layer formed on the source and drain electrodes, the second electrode, and the gate insulation layer;

a common electrode formed on the inter-layer insulation layer;

a protection layer formed on the inter-layer insulation layer; and

a contact hole formed through the inter-layer insulation layer and the protection layer,

wherein the first pixel electrode and the second pixel electrode are formed diagonally to the data lines and the gate lines, and

wherein the first electrode and the second electrode are connected to a semiconductor layer.

10. The liquid crystal display device of claim 9, wherein the fourth data line overlaps the third pixel area and is between the third and fifth data lines, and

wherein the slits in the first pixel electrode are symmetrical to the slits in the third pixel electrode.

11. A liquid crystal display device, comprising:

first, second, and third data lines extending in a first direction on a substrate;

a plurality of gate lines extending in a second direction on the substrate;

at least one pixel unit including a first pixel electrode formed in a first pixel area between the first and third data lines intersecting the gate lines, at one side of a first gate line, and a second pixel electrode formed in a second pixel area between the first and third data lines, at another side of the first gate line; and

at least one circuit unit formed between the first pixel area and the second pixel area and including a first transistor in which a first electrode of the first transistor is connected to the first data line and a second electrode of the first transistor is connected to the first pixel electrode, and a second transistor in which a third electrode of the second transistor is connected to the third data line and a fourth electrode of the second transistor is connected to the second pixel electrode,

wherein the second data line is positioned between the first and third data lines to intersect the first pixel area.

12. The liquid crystal display device of claim 11, further comprising:

fourth and fifth data lines,

wherein the at least one pixel unit includes a third pixel electrode formed in a third pixel area between the third and fifth data lines intersecting the gate lines, at the one side of the first gate line, and a fourth pixel electrode formed in a fourth pixel area between the third and fifth data lines, at the another side of the first gate line,

wherein the first pixel electrode includes slits in a first diagonal direction for a first domain and the second pixel electrode includes slits in a second diagonal direction for a second domain, and

wherein the fourth data line is positioned between the third and fifth data lines to intersect the third pixel area.

13. The liquid crystal display device of claim 11, wherein the fourth data line ^-is between the third and fifth data lines.

14. The liquid crystal display device of claim 11, wherein the slits in the first pixel electrode are symmetrical to the slits in the third pixel electrode.

15. The liquid crystal display device of claim 11, wherein angles of all of the slits in the first pixel electrode are positive and angles of all of the slits in the third pixel electrode are negative.

16. The liquid crystal display device of claim 11, wherein the slits in the first and third pixel electrodes are in third and fourth directions, respectively, in the substrate, and

wherein the first and second directions are vertical and horizontal, respectively, and the third and fourth directions are diagonal.

17. The liquid crystal display device of claim 16, wherein the slits in the first pixel electrode are symmetrical to the slits in the third pixel electrode.

18. The liquid crystal display device of claim 11, further comprising:

a gate electrode formed on the substrate;

a gate insulation layer formed on the gate electrode, wherein the second electrode is formed on the gate insulation layer;

source and drain areas formed on the gate insulation layer on opposite sides of the second electrode; and

source and drain electrodes formed on the source and drain areas, respectively.

19. The liquid crystal display device of claim 18, further comprising:

an inter-layer insulation layer formed on the source and drain electrodes, second electrode, and gate insulation layer;

a common electrode formed on the inter-layer insulation layer;

a protection layer formed on the inter-layer insulation layer; and

a contact hole foamed through the inter-layer insulation layer and protection layer,

wherein the first pixel electrode and the second pixel electrode are formed diagonally to the data lines and the gate lines, and

wherein the first electrode and the second electrode are connected to a semiconductor layer.

20. A liquid crystal display device, comprising:

first, second, and third data lines extending in a vertical direction on a substrate;

a first gate line extending in a horizontal direction and intersecting the first, second, and third data lines on the substrate;

at least one pixel unit including a first pixel electrode formed in a first pixel area between the first and third data lines, at one side of the first gate line, and a second pixel electrode formed in a second pixel area between the first and third data lines, at another side of the first gate line; and

first and second transistors connected to the first and third data lines and formed in the first and second pixel areas, respectively,

wherein the slits in the first and third pixel electrodes are in third and fourth directions, respectively, in the substrate,

wherein the first and second directions are vertical and horizontal, respectively, and the third and fourth directions are diagonal, and

wherein the slits in the first pixel electrode are symmetrical to the slits in the third pixel electrode.