IP Library Granted Patent US 8,345,196
Granted Patent B2
US 8,345,196 · App. 12/603,554 · Granted Jan 1, 2013

Liquid crystal display

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Quick Facts
Patent No.
US 8,345,196
App. No.
12/603,554
Granted
Jan 1, 2013
Kind
B2
Abstract

A liquid crystal display with better visibility and transmittance. The liquid crystal display includes a first plate having a first field-generating electrode, disposed in a pixel area on an insulating substrate, comprising a plurality of sub-electrodes which are separated from each other by a predetermined distance and arranged parallel to each other, and a connecting electrode electrically connecting the sub-electrodes. An alignment film that is rubbed in a first direction covers a first field-generating electrode and an alignment film that is rubbed in a second direction covers a second field-generating electrode to achieve a predetermined orientation of the liquid crystals when no field is applied and more uniform rotation of the liquid crystal molecules when a field is applied.

Claims (35)

1. A liquid crystal display comprising:

a first substrate;

a thin film transistor disposed on the first substrate;

a passivation layer disposed on the thin film transistor;

a first electrode, disposed on the passivation layer and electrically connected to the thin film transistor thorough a first contact hole disposed on the passivation layer, comprising:

a plurality of sub-electrodes which are separated from each other by a predetermined distance and arranged parallel to each other, and

a connecting electrode electrically connecting the sub-electrodes; and

a first alignment film directly contacting the first electrode;

a second substrate;

a second electrode disposed on the second substrate; a second alignment film disposed on the second electrode; a liquid crystal layer comprising liquid crystal molecules interposed between the first substrate and the second substrate; and wherein the first alignment film has been rubbed in a first direction and the second alignment film has been rubbed in a second direction.

2. The liquid crystal display of claim 1 , wherein the passivation layer comprises an inorganic material.

3. The liquid crystal display of claim 1 , wherein the passivation layer comprises an organic material.

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

a gate wire disposed on the first substrate and comprising a gate electrode;

a gate insulating layer disposed on the gate line; and

a data wire disposed on the gate insulating layer and comprising a drain electrode and a source electrode.

5. The liquid crystal display of claim 4 , further comprising:

a gate pad disposed at an end of the gate line; and

a data pad disposed at an end of the data line.

6. The liquid crystal display of claim 5 , wherein the passivation layer is disposed on the gate wire and the data wire.

7. The liquid crystal display of claim 6 , further comprising:

a auxiliary gate pad disposed on the passivation layer and electrically connected to the gate pad thorough a second contact hole disposed on the passivation layer; and

a auxiliary data pad disposed on the passivation layer and electrically connected to the gate pad thorough a third contact hole disposed on the passivation layer.

8. The liquid crystal display of claim 1 , wherein long axes of the liquid crystal molecules are substantially parallel to the first substrate and second substrate.

9. The liquid crystal display of claim 8 , wherein the first and second alignment films are horizontal-alignment films.

10. The liquid crystal display of claim 8 , wherein liquid crystal molecules constituting the liquid crystal layer have negative dielectric anisotropy.

11. The liquid crystal display of claim 1 , wherein the pre-tilt angle of liquid crystal molecules constituting the liquid crystal layer is in a range between 0.5 and 3 degrees.

12. The liquid crystal display of claim 1 , wherein the first direction and the second direction form an angle of 180 degrees.

13. The liquid crystal display of claim 12 , wherein the sub-electrodes and the first direction form an angle of 60 to 85 degrees.

14. The liquid crystal display of claim 1 , wherein a width of each of the sub-electrodes is 6 μm or less.

15. The liquid crystal display of claim 1 , wherein a distance between the sub-electrodes is in a range between 4 and 14 μm.

16. The liquid crystal display of claim 1 , wherein the second electrode comprises a planar shape.

17. The liquid crystal display of claim 15 , wherein the second alignment film directly contacts the second electrode.

18. The liquid crystal display of claim 1 , wherein the connecting electrode is connected the sub-electrodes at a side of the sub-electrodes.

19. The liquid crystal display of claim 1 , wherein the connecting electrode is connected the sub-electrodes at the center portion of the sub-electrodes.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 23, 2012
From: SAMSUNG ELECTRONICS CO., LTD.
To: SAMSUNG DISPLAY CO., LTD.
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