IP Library Granted Patent US 8,253,912
Granted Patent B2
US 8,253,912 · App. 12/243,681 · Granted Aug 28, 2012

Liquid crystal display

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Quick Facts
Patent No.
US 8,253,912
App. No.
12/243,681
Granted
Aug 28, 2012
Kind
B2
Abstract

A liquid crystal display (“LCD”) includes a decoupling line extending in a first direction, first and second data lines extending in a second direction perpendicular to the first direction, a pixel electrode including a first sub-pixel electrode and a second sub-pixel electrode. The pixel electrode further includes a lower domain-dividing part formed thereon. The LCD further includes a common electrode disposed opposite the pixel electrode and including an upper domain-dividing part formed thereon, and a first decoupling electrode including a slanting part and a straight part. The slanting part extends from the decoupling line and overlaps a portion of one of the lower domain-dividing part and the upper domain-dividing part, and the straight part extends from the slanting part and is formed parallel to the first data line in an area of the pixel where the first sub-pixel electrode and the first data line are adjacent to each other.

Claims (50)

1. A liquid crystal display comprising:

a gate line and a decoupling line extending in a first direction;

a first data line and a second data line extending in a second direction crossing the first direction;

a pixel electrode comprising:

a lower domain-dividing part formed thereon;

a first sub-pixel electrode which receives a first data voltage from the first data line; and

a second sub-pixel electrode which receives a second data voltage from the second data line;

a common electrode disposed opposite the pixel electrode and comprising an upper domain-dividing part formed thereon; and

a first decoupling electrode connected to the decoupling line and comprising:

a slanting part which extends from the decoupling line; and

a straight part connected to the slanting part and which extends from the slanting part;

wherein

the slanting part overlaps at least a portion of one of the lower domain-dividing part and the upper domain-dividing part, and

the straight part is formed substantially parallel to the first data line in an area where the first sub-pixel electrode and the first data line are adjacent to each other.

2. The liquid crystal display of claim 1 , wherein

the lower domain-dividing part comprises a first lower domain-dividing part dividing the first sub-pixel electrode and the second sub-pixel electrode, and a second lower domain-dividing part disposed on the first sub-pixel electrode and the second sub-pixel electrode, and

the slanting part overlaps at least a portion of the first lower domain-dividing part.

3. The liquid crystal display of claim 1 , wherein

the lower domain-dividing part comprises a first lower domain-dividing part dividing the first sub-pixel electrode and the second sub-pixel electrode, and a second lower domain-dividing part disposed on the first sub-pixel electrode, and the second sub-pixel electrode, and

the slanting part overlaps at least a portion of the second lower domain-dividing part.

4. The liquid crystal display of claim 1 , wherein a capacitance formed between the decoupling line and the pixel electrode is greater than approximately 5% of a capacitance formed between the pixel electrode and the common electrode and is less than approximately 20% of the capacitance formed between the pixel electrode and the common electrode.

5. The liquid crystal display of claim 4 , wherein a width of the decoupling line measured in the second direction is greater than approximately 5 μm and is less than approximately 15 μm.

6. The liquid crystal display of claim 1 , further comprising a second decoupling electrode extending from the decoupling line and being disposed substantially parallel to the second data line in an area where the first sub-pixel electrode and the second data line are adjacent to each other.

7. The liquid crystal display of claim 6 , wherein a direct current voltage is applied to the decoupling line.

8. The liquid crystal display of claim 6 , wherein at least a portion of the first data line and the second data line overlap at least a portion of the second sub-pixel electrode.

9. The liquid crystal display of claim 8 , wherein the second sub-pixel electrode comprises:

a main area formed at one of an angle of approximately 45° or approximately −45° with respect to the first direction; and

a bridge area formed substantially parallel to the first data line the second data line, wherein

the bridge area is connected to the main area, and

the at least a portion of the first data line and the second data line overlaps at least a portion of the bridge area.

10. The liquid crystal display of claim 1 , wherein the first data voltage is greater than the second voltage.

11. A liquid crystal display comprising:

a gate line and a decoupling line extending in a first direction;

a first data line and a second data line extending in a second direction crossing the first direction;

a pixel electrode comprising:

a first sub-pixel electrode which receives a first data voltage from the first data line; and

a second sub-pixel electrode which receives a second data voltage from the second data line;

a common electrode disposed opposite the pixel electrode;

a first decoupling electrode extending from the decoupling line and being formed substantially parallel to the first data line in an area where the first sub-pixel electrode and the first data line are adjacent to each other; and

a second decoupling electrode extending from the decoupling line and being formed substantially parallel to the second data line in an area where the first sub-pixel electrode and the second data line are adjacent to each other;

wherein a capacitance formed between the decoupling line and the pixel electrode is greater than approximately 5% of a capacitance formed between the pixel electrode and the common electrode and is less than approximately 20% of the capacitance formed between the pixel electrode and the common electrode.

12. The liquid crystal display of claim 11 , wherein a width of the decoupling line is greater than approximately 5 μm and less than approximately 15 μm.

13. The liquid crystal display of claim 11 , wherein a direct current voltage is applied to the decoupling line.

14. The liquid crystal display of claim 11 , wherein at least a portion of the first data line and the second data line overlaps at least a portion of the second sub-pixel electrode.

15. The liquid crystal display of claim 14 , wherein the second sub-pixel electrode comprises:

a main area formed at one of an angle of approximately 45° or approximately −45° with respect to the first direction; and

a bridge area formed substantially parallel to the first data line and the second data line, wherein

the bridge area is connected to the main area, and

at least a portion of the first data line and the second data line overlap at least a portion of the bridge area.

16. The liquid crystal display of claim 11 , wherein the first data voltage applied to the first sub-pixel electrode is less than the second data voltage applied to the second sub-pixel electrode.

Assignments (2)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 27, 2012
From: SAMSUNG ELECTRONICS CO., LTD.
To: SAMSUNG DISPLAY CO., LTD.
Reel/Frame 029093/0177 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 1, 2008
From: NA, HYE-SEOK; BAEK, SEUNG-SOO; KIM, DONG-GYU
To: SAMSUNG ELECTRONICS CO., LTD.
Reel/Frame 021618/0665 →