Liquid crystal display

Patent metadata

Field	Value
Publication number	US-2015177575-A1
Application number	US-201414541293-A
Country	US
Kind code	A1
Filing date	Nov 14, 2014
Priority date	Dec 24, 2013
Publication date	Jun 25, 2015
Grant date	—

Abstract

A liquid crystal display includes a first substrate, a first subpixel electrode is disposed on the first substrate and has a planar shape and, an insulating layer disposed on the first subpixel electrode, a second subpixel electrode which is disposed on the insulating layer, overlaps the first subpixel electrode, and includes a plurality of branch electrodes, a second substrate facing the first substrate, a common electrode disposed on the second substrate, and a liquid crystal layer injected between the first substrate and the second substrate, where the first subpixel electrode and the second subpixel electrode are applied with voltages of the same magnitude, and dielectric anisotropy of the liquid crystal layer is about −2.0 to about −2.7 at a temperature of about 30 degrees Celsius.

First claim

What is claimed is:

1 . A liquid crystal display comprising:
a first substrate; a first subpixel electrode which is disposed on the first substrate and has a planar shape and; an insulating layer disposed on the first subpixel electrode; a second subpixel electrode which is disposed on the insulating layer, overlaps the first subpixel electrode, and includes a plurality of branch electrodes; a second substrate facing the first substrate; a common electrode disposed on the second substrate; and a liquid crystal layer between the first substrate and the second substrate, wherein the first subpixel electrode and the second subpixel electrode are applied with voltages of the same magnitude, and dielectric anisotropy of the liquid crystal layer is about −2.0 to about −2.7 at a temperature of about 30 degrees Celsius.

2 . The liquid crystal display of claim 1 , wherein
an interval between two adjacent branch electrodes among the plurality of branch electrodes is equal to or greater than a width of a branch electrode of the plurality of branch electrodes.

3 . The liquid crystal display of claim 2 , wherein
the width of the branch electrode of the plurality of branch electrodes is about 2 micrometers to about 3 micrometers, and the interval between the two adjacent branch electrodes among the plurality of branch electrodes is about 3 micrometers to about 4 micrometers.

4 . The liquid crystal display of claim 3 , wherein
a cell interval of the liquid crystal layer is about 2.6 micrometers to about 3 micrometers.

5 . The liquid crystal display of claim 1 , wherein
a width of a branch electrode of the plurality of branch electrodes is about 2 micrometers to about 3 micrometers, and an interval between two adjacent branch electrodes among the plurality of branch electrodes is about 3 micrometers to about 4 micrometers.

6 . The liquid crystal display of claim 5 , wherein
a cell interval of the liquid crystal layer is about 2.6 micrometers to about 3 micrometers.

7 . The liquid crystal display of claim 1 , wherein
a cell interval of the liquid crystal layer is about 2.6 micrometers to about 3 micrometers.

8 . The liquid crystal display of claim 1 , wherein
the first subpixel electrode and the second subpixel electrode are connected to each other through a contact hole defined in the insulating layer.

9 . The liquid crystal display of claim 1 , further comprising:
a gate line and a data line disposed on the first substrate; and a thin film transistor which is connected to the gate line and the data line and includes a drain electrode, wherein at least one of the first subpixel electrode and the second subpixel electrode is connected to the drain electrode of the thin film transistor.

10 . A liquid crystal display comprising:
a first substrate; a first subpixel electrode disposed on the first substrate; an insulating layer disposed on the first subpixel electrode; a second subpixel electrode disposed on the insulating layer and overlapping the first subpixel electrode; a second substrate facing the first substrate; a common electrode disposed on the second substrate; and a liquid crystal layer between the first substrate and the second substrate, wherein the first subpixel electrode and the second subpixel electrode are applied with voltages of the same magnitude, the second subpixel electrode includes a plurality of branch electrodes, the first subpixel electrode has a planar shape, and an interval between two adjacent branch electrodes among the plurality of branch electrodes is equal to or greater than a width of a branch electrode of the plurality of branch electrodes.

11 . The liquid crystal display of claim 10 , wherein
the width of the branch electrode of the plurality of branch electrodes is about 2 micrometers to about 3 micrometers, and the interval between the two adjacent branch electrodes among the plurality of branch electrodes is about 3 micrometers to about 4 micrometers.

12 . The liquid crystal display of claim 11 , wherein
a cell interval of the liquid crystal layer is about 2.6 micrometers to about 3 micrometers.

13 . The liquid crystal display of claim 10 , wherein
a cell interval of the liquid crystal layer is about 2.6 micrometers to about 3 micrometers.

14 . A liquid crystal display comprising:
a first substrate; a first subpixel electrode disposed on the first substrate; an insulating layer disposed on the first subpixel electrode; a second subpixel electrode disposed on the insulating layer and overlapping the first subpixel electrode; a second substrate facing the first substrate; a common electrode disposed on the second substrate; and a liquid crystal layer between the first substrate and the second substrate, wherein the first subpixel electrode and the second subpixel electrode are applied with voltages of the same magnitude, the second subpixel electrode includes a plurality of branch electrodes, the first subpixel electrode has a planar shape, and a cell interval of the liquid crystal layer is about 2.6 micrometers to about 3 micrometers.

Assignees

• Samsung Display Co Ltd

Inventors

• Rho Soon Joon
• Jang Hye Lim
• Kim Kyung Min
• Kim Jin-Lak

Classifications

• G02F1/137

  characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering · CPC title

• G02F2001/134345

  Physics · mapped topic

• G02F1/134309 Primary

  characterised by their geometrical arrangement · CPC title

• G02F1/133345

  Insulating layers (G02F1/1335, G02F1/1337, G02F1/135, G02F1/136 take precedence) · CPC title

• G02F2001/13712

  Physics · mapped topic