Liquid crystal display

Patent metadata

Field	Value
Publication number	US-8941806-B2
Application number	US-201213419853-A
Country	US
Kind code	B2
Filing date	Mar 14, 2012
Priority date	Sep 28, 2011
Publication date	Jan 27, 2015
Grant date	Jan 27, 2015

Abstract

A liquid crystal display includes a gate line, data lines transmitting a first voltage; a transmitting line transmitting a second voltage; and pixels including first and second pixel electrodes. One pixel electrode receives the first voltage through a data line, and the other receives the second voltage through the transmitting line. Branch electrodes of the pixel electrodes alternate, and a stem of the first pixel electrode of a first pixel, faces a stem of the first pixel electrode of a second pixel and a stem of the second pixel electrode of the second pixel, with respect to the data line. Areas of the stem of the first pixel electrode of the second pixel facing the stem of the first pixel electrode of the first pixel, and of the stem of the second pixel electrode of the second pixel facing the stem of the first pixel, are the same.

First claim

What is claimed is:

1. A liquid crystal display comprising:
a first substrate and a second substrate which face each other;
a liquid crystal layer between the first and second substrates and including liquid crystal molecules;
a gate line which is on the first substrate and transmits a gate signal;
a plurality of data lines which is on the first substrate and transmits a first voltage;
a voltage transmitting line which is on the first substrate and transmits a second voltage maintained at a predetermined level for a frame; and
a plurality of pixels on the first substrate, each pixel including a first pixel electrode, and a second pixel electrode different from the first pixel electrode and separated from the first pixel electrode,
wherein
the plurality of pixels includes a first pixel, and a second pixel adjacent to the first pixel, with respect to a first data line between the first and second pixels,
one of the first pixel electrode and the second pixel electrode receives the first voltage through one data line, and the other of the first pixel electrode and the second pixel electrode receives the second voltage through the voltage transmitting line,
the first pixel electrode and the second pixel electrode each include stems at pixel peripheral edges adjacent to the voltage transmitting line and the first data line, and a plurality of branch electrodes which extend from the stems, respectively, wherein branch electrodes of the first pixel electrode and branch electrodes of the second pixel electrode alternate,
a stem of the first pixel electrode of the first pixel, faces a stem of the first pixel electrode of the second pixel and a stem of the second pixel electrode of the second pixel, with respect to the first data line between the first and second pixels, and
an area of the stem of the first pixel electrode of the second pixel which faces the stem of the first pixel electrode of the first pixel, and an area of the stem of the second pixel electrode of the second pixel which faces the stem of the first pixel electrode of the first pixel, are substantially the same.

2. The liquid crystal display of claim 1 , wherein
the stem of the second pixel electrode of the first pixel, faces the stem of the first pixel electrode of the second pixel and the stem of the second pixel electrode of the second pixel, with respect to the first data line between the first and second pixels, and
an area of the stem of the first pixel electrode of the second pixel which faces the stem of the second pixel electrode of the first pixel, and an area of the stem of the second pixel electrode of the second pixel which faces the stem of the second pixel electrode of the first pixel, are substantially the same.

3. The liquid crystal display of claim 2 , wherein
the voltage transmitting line is connected to three pixels of the plurality of pixels.

4. The liquid crystal display of claim 3 , wherein
the stems of the first pixel electrode and the second pixel electrode overlap at least ⅔ of an area of the voltage transmitting line.

5. The liquid crystal display of claim 4 , wherein
a first interval between the branches of the first pixel electrode and the branches of the second pixel electrode is larger than a second interval between the branches of the first pixel electrode and the branches of the second pixel electrode,
a first region includes the first interval between the branches of the first pixel electrode and the branches of the second pixel electrode, and a second region includes the second interval between the branches of the first pixel electrode and the branches of the second pixel electrode, and
the first region is at the peripheral edge of the pixel which excludes the stems of the first pixel electrode and the second pixel electrode.

6. The liquid crystal display of claim 5 , wherein
the liquid crystal layer vertically aligns in the absence of an electric field in the liquid crystal layer.

7. The liquid crystal display of claim 6 , wherein
the first region further includes an extension including a third interval between the branches of the first pixel electrode and the branches of the second pixel electrode larger than the first interval.

8. The liquid crystal display of claim 1 , wherein
the voltage transmitting line is connected to three pixels of the plurality of pixels.

9. The liquid crystal display of claim 8 , wherein
the stems of the first pixel electrode and the second pixel electrode overlap at least ⅔ of an area of the voltage transmitting line.

10. The liquid crystal display of claim 9 , wherein
a first interval between the branches of the first pixel electrode and the branches of the second pixel electrode is larger than a second interval between the branches of the first pixel electrode and the branches of the second pixel electrode,
a first region includes the first interval between the branches of the first pixel electrode and the branches of the second pixel electrode, and a second region includes the second interval between the branches of the first pixel electrode and the branches of the second pixel electrode, and
the first region is at the peripheral edge of the pixel which excludes the stems of the first pixel electrode and the second pixel electrode.

11. The liquid crystal display of claim 10 , wherein
the liquid crystal layer vertically aligns in the absence of an electric field in the liquid crystal layer.

12. The liquid crystal display of claim 11 , wherein
the first region further includes an extension including a third interval between the branches of the first pixel electrode and the branches of the second pixel electrode larger than the first interval.

13. The liquid crystal display of claim 1 , wherein
the stems of the first pixel electrode and the second pixel electrode overlap at least ⅔ of an area of the voltage transmitting line.

14. The liquid crystal display of claim 13 , wherein
a first interval between the branches of the first pixel electrode and the branches of the second pixel electrode is larger than a second interval between the branches of the first pixel electrode and the branches of the second pixel electrode,
a first region includes the first interval between the branches of the first pixel electrode and the branches of the second pixel electrode, and a second region includes the second interval between the branches of the first pixel electrode and the branches of the second pixel electrode, and
the first region is at the peripheral edge of the pixel which excludes the stems of the first pixel electrode and the second pixel electrode.

15. The liquid crystal display of claim 14 , wherein
the liquid crystal layer vertically aligns in the absence of an electric field in the liquid crystal layer.

16. The liquid crystal display of claim 15 , wherein
the first region further includes an extension including a third interval between the branches of the first pixel electrode and the branches of the second pixel electrode larger than the first interval.

17. The liquid crystal display of claim 1 , wherein
a first interval between the branches of the first pixel electrode and the branches of the second pixel electrode is larger than a second interval between the branches of the first pixel electrode and the branches of the second pixel electrode,
a first region includes the first interval between the branches of the first pixel electrode and the branches of the second pixel electrode, and a second region includes the second interval between the branches of the first pixel electrode and the branches of

Assignees

• Jung Kwang-Chul
• Cho Se Hyoung
• Samsung Display Co Ltd

Inventors

• Jung Kwang-Chul
• Cho Se Hyoung

Classifications

• G02F2203/30

  Gray scale · CPC title

• G02F2001/13706

  Physics · mapped topic

• G02F1/1393

  the birefringence of the liquid crystal being electrically controlled, e.g. ECB-, DAP-, HAN-, PI-LC cells (G02F1/1396, G02F1/141 take precedence) · CPC title

• G09G3/3648

  using an active matrix (G09G3/367 - G09G3/3696 take precedence) · CPC title

• G02F2001/134345

  Physics · mapped topic