IP Library Granted Patent US 8,896,797
Granted Patent B2
US 8,896,797 · App. 13/046,602 · Granted Nov 25, 2014

Liquid crystal display panel comprising first and second sub-pixel electrodes and including a contact electrode and a connection electrode that couples the second sub-pixel and contact electrodes

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Quick Facts
Patent No.
US 8,896,797
App. No.
13/046,602
Granted
Nov 25, 2014
Kind
B2
Abstract

A liquid crystal display panel having improved lateral visibility. The liquid crystal display panel includes a first substrate including a pixel electrode formed on a pixel area including a first sub-pixel area and a second sub-pixel area; and a second substrate coupled to the first substrate with a liquid crystal layer accommodated between the first substrate and the second substrate, and including a common electrode formed on an area corresponding to the pixel area, wherein the pixel electrode includes a first sub-pixel electrode formed on the first sub-pixel area; a second sub-pixel electrode formed on the second sub-pixel area; and a contact electrode formed between the first sub-pixel area and the second sub-pixel area, and wherein the first sub-pixel electrode and the contact electrode are spaced apart from each other by a predetermined distance.

Claims (25)

1. A liquid crystal display panel comprising:

a first substrate comprising a pixel electrode on a pixel area comprising a first sub-pixel area and a second sub-pixel area, the first sub-pixel area including a first opening; and

a second substrate coupled to the first substrate with a liquid crystal layer accommodated between the first substrate and the second substrate, and comprising a common electrode formed on an area corresponding to the pixel area,

wherein the pixel electrode comprises:

a first sub-pixel electrode on the first sub-pixel area;

a second sub-pixel electrode on the second sub-pixel area;

a switching device between the first sub-pixel area and the second sub-pixel area including a gate electrode, a source electrode, and a drain electrode;

a contact electrode on a non-pixel area between the first sub-pixel area and the second sub-pixel area, wherein the contact electrode is electrically connected to the drain electrode of the switching device via a contact portion formed in an extension portion of the drain electrode between the first sub-pixel area and the second sub-pixel area, wherein the drain electrode extends to the first opening of the first sub-pixel area to bridge data between the first sub-pixel area and the second sub-pixel area, and

wherein the first sub-pixel electrode and the contact electrode are spaced apart from each other by a predetermined distance; and

a connection electrode between the second sub-pixel electrode and the contact portion and not including the contact portion for electrically coupling the second sub-pixel electrode and the contact electrode to each other.

2. The liquid crystal display panel of claim 1 , wherein the first substrate further comprises:

a gate electrode;

a semiconductor layer insulated from the gate electrode; and

a source electrode and a drain electrode that are electrically coupled to the semiconductor layer, and

wherein the drain electrode extends to the first sub-pixel area.

3. The liquid crystal display panel of claim 2 , further comprising a passivation layer between the pixel electrode and the drain electrode.

4. The liquid crystal display panel of claim 3 , further comprising a coupling capacitor formed by the first sub-pixel electrode, the passivation layer, and the drain electrode extending to the first sub-pixel area.

5. The liquid crystal display panel of claim 3 , further comprising a storage wiring to overlap the pixel electrode.

6. The liquid crystal display panel of claim 5 , further comprising a storage capacitor formed by the storage wiring, the passivation layer, and the contact electrode.

7. The liquid crystal display panel of claim 1 , wherein the first sub-pixel electrode is a floating electrode.

8. The liquid crystal display panel of claim 1 , wherein a first opening is formed in at least a portion of the common electrode to correspond to the first sub-pixel electrode.

9. The liquid crystal display panel of claim 8 , wherein the first substrate further comprises:

a drain electrode extending to the first sub-pixel area; and

a passivation layer interposed between the pixel electrode and the drain electrode,

wherein a coupling capacitor is formed by a region of the first sub-pixel electrode in which the first opening is formed, the passivation layer, and the drain electrode.

Assignments (3)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 21, 2022
From: SAMSUNG DISPLAY CO., LTD.
To: TCL CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
Reel/Frame 060778/0543 →
MERGER Recorded Aug 20, 2012
From: SAMSUNG MOBILE DISPLAY CO., LTD.
To: SAMSUNG DISPLAY CO., LTD.
Reel/Frame 028816/0306 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Mar 16, 2011
From: AHN, HYEONG-CHEOL
To: SAMSUNG MOBILE DISPLAY CO., LTD.
Reel/Frame 025970/0621 →