Liquid crystal display and manufacturing method thereof

Patent metadata

Field	Value
Publication number	US-9599845-B2
Application number	US-201414180759-A
Country	US
Kind code	B2
Filing date	Feb 14, 2014
Priority date	Mar 4, 2013
Publication date	Mar 21, 2017
Grant date	Mar 21, 2017

Abstract

A liquid crystal display includes a plurality of pixel electrodes and common electrodes disposed on a first substrate that overlap each other with a passivation layer interposed therebetween, and a connection portion disposed between a common voltage applying unit and the common electrode. The common electrode has a plurality of first cutouts, the passivation layer has a plurality of second cutouts, and the first cutout and the second cutout have substantially the same planar shape. The connection portion includes a lower connection portion formed from a same layer as the common electrode, and an upper connection portion disposed on the lower connection portion that includes a low resistance metal.

First claim

What is claimed is:

1. A liquid crystal display, comprising:
a plurality of pixel electrodes and a common electrode disposed on a first substrate that overlap each other with a passivation layer interposed therebetween;
a common voltage applying unit disposed in a peripheral area around a display area that includes the plurality of pixel electrodes, and
a connection portion disposed between the common voltage applying unit and the common electrode,
wherein the common electrode has a plurality of first cutouts,
the passivation layer has a plurality of second cutouts,
the first cutout and the second cutout have substantially the same planar shape, and
the connection portion is formed with the same layer as the common electrode.

2. The liquid crystal display of claim 1 , wherein:
the connection portion includes a lower connection portion formed with the same layer as the common electrode, and
an upper connection portion disposed on the lower connection portion and including low resistance metal.

3. The liquid crystal display of claim 2 ,
further comprising:
a common voltage line disposed on a portion of the common electrode,
wherein the common voltage line is formed from the same layer as the upper connection portion.

4. The liquid crystal display of claim 3 , further comprising:
a plurality of gate lines and a plurality of data lines disposed on the first substrate, wherein:
the common voltage line extends parallel to the gate line.

5. The liquid crystal display of claim 3 , wherein:
the common voltage line is disposed between two adjacent data lines and extends parallel to the data lines.

6. The liquid crystal display of claim 1 , further comprising:
a plurality of gate lines and a plurality of data lines disposed on the first substrate;
a plurality of thin film transistors connected to the plurality of gate lines and the plurality of data lines, respectively; and
an organic layer disposed on the plurality of thin film transistors and wherein the plurality of pixel electrodes and the common electrode are disposed on the organic layer.

7. The liquid crystal display of claim 6 , wherein:
the organic layer comprises a color filter.

8. The liquid crystal display of claim 7 , further comprising:
a light blocking member disposed on the first substrate.

9. The liquid crystal display of claim 6 , further comprising:
a second substrate facing the first substrate; and
a compensation electrode disposed on an outer surface of the second substrate.

10. The liquid crystal display of claim 9 , wherein the common electrode on the first substrate overlaps the data line to form a first capacitor, and the compensation electrode on the second substrate forms a second capacitor with the common electrode.

11. The liquid crystal display of claim 10 , wherein the compensation electrode is configured to receive a voltage having a polarity opposite to that of a data voltage applied to the data line to compensate for a coupling between the data line and the common electrode.

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Sung Man
• Kim Duk-Sung
• Na Man Hong
• Song Jun Ho
• Cho Young Je

Classifications

• G02F1/133707

  Structures for producing distorted electric fields, e.g. bumps, protrusions, recesses, slits in pixel electrodes · CPC title

• G02F1/1345

  Conductors connecting electrodes to cell terminals · CPC title

• G02F1/13306 Primary

  Circuit arrangements or driving methods for the control of single liquid crystal cells (G02F1/132, G02F1/133382 take precedence) · CPC title

• G02F1/13439

  characterised by their electrical, optical, physical properties; materials therefor; method of making · CPC title

• G02F1/134363 Primary

  for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS] · CPC title