Display device

• US 8,274,617 B2
• Filed: 12/18/2008
• Issued: 09/25/2012
• Est. Priority Date: 08/19/2008
• Status: Expired due to Fees

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kim, Dong-Gyu
• Primary Examiner(s): Briggs, Nathanael R
• Application Number:
  US12/338,212
• Publication Number:
  US 20100045586A1
• Time in Patent Office: 1,377 Days
• Field of Search: 349 38- 39, 349/43, 349/129
• US Class Current: 349/39
• CPC Class Codes: G02F 1/136213 Storage capacitors associated with the pixel electrode
• 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 1/1393 the birefringence of the liquid crystal being electrically controlled, e.g. ECB-, DAP-, HAN-, PI-LC cells G02F1/1396, G02F1/141 take precedence
• CPC Class Codes: G09G 2300/0426 Layout of electrodes and connections
• CPC Class Codes: G09G 3/3648 using an active matrix G09G3/367 - G09G3/3696 take precedence
• CPC Class Codes: H01L 27/12 the substrate being other than a semiconductor body, e.g. an insulating body
• 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

A display device includes a pixel electrode disposed on a first substrate, and including a first portion, a second portion and a connection portion disposed between the first portion and the second portion, a capacitor line disposed on the first substrate and between the first substrate and the connection portion, a nonsymmetrical shaped capacitor electrode disposed on the first substrate and overlapping the pixel electrode and the capacitor line, and electrically connected to the pixel electrode through contact holes, and a common electrode disposed on a second substrate and including first and second opening patterns disposed overlapping the first portion and the second portion of the pixel electrode, respectively.

Claims

1. A display device comprising:

a first substrate;

a switch element disposed on the first substrate

a pixel electrode disposed on the first substrate, the pixel electrode comprising a first portion, a second portion, and a connection portion disposed between the first and second portions, and electrically connecting the first and second portions with each other;

a capacitor line disposed on the first substrate, and between the first substrate and the connection portion of the pixel electrode;

a first capacitor electrode disposed on the first substrate substantially in a nonsymmetrical shape in a plan view, the first capacitor electrode overlapping the pixel electrode;

a second capacitor electrode disposed on the first substrate, overlapping the first capacitor electrode and electrically connected to the capacitor line;

an insulating layer including a first contact hole, and a second contact hole, the insulating layer disposed between the switch element and the pixel electrode, and between the first capacitor electrode and the pixel electrode;

a second substrate; and

a common electrode disposed on the second substrate, and comprising a first opening pattern and a second opening pattern disposed overlapping the first portion and the second portion of the pixel electrode, respectively,

wherein the pixel electrode is electrically connected to a terminal of the switch element through the first contact hole and to the first capacitor electrode through the second contact hole.

2. The display device of claim 1, wherein both the first contact hole and the second contact hole are arranged overlapping a single one of the first opening pattern or the second opening pattern, and an entire of the first contact hole and the second contact hole is overlapped by the respective opening pattern.

3. The display device of claim 1, wherein the insulating layer further comprises a third contact hole, the pixel electrode being electrically connected to the first capacitor electrode through the third contact hole.

4. The display device of claim 3, wherein both the first and the second contact holes are arranged overlapping the first portion of the pixel electrode, and the third contact hole is arranged overlapping the second portion of the pixel electrode.

5. The display device of claim 4, wherein the second contact hole and the third contact hole are arranged overlapping the first opening pattern and the second opening pattern, respectively.

6. The display device of claim 5, wherein both the first contact hole and the second contact hole are arranged overlapping a single one of the first opening pattern or the second opening pattern.

7. The display device of claim 1, wherein the connection portion of the pixel electrode is extended substantially parallel to a longitudinal extension of the first capacitor electrode.

8. The display device of claim 7, further comprising an organic insulation pattern disposed on the first substrate and directly contacting a lower surface of the pixel electrode.

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

a pad electrically connected to the switch element, the pad transmitting a signal to the switch element;

an auxiliary pad connected to the pad through a pad contact hole of the insulating layer, and

an auxiliary pattern disposed surrounding the pad contact hole.

10. The display device of claim 1, wherein the first capacitor electrode comprises a first extension part and a second extension part overlapping with the first and second portions of the pixel electrode, respectively.

11. The display device of claim 10, wherein the second contact hole overlaps one of the first extension part and the second extension part of the first capacitor electrode.

12. The display of claim 11, wherein the first capacitor electrode and the second capacitor electrode are substantially the same shape, in a plan view.