Liquid crystal display device

Patent metadata

Field	Value
Publication number	US-2016116809-A1
Application number	US-201514639845-A
Country	US
Kind code	A1
Filing date	Mar 5, 2015
Priority date	Oct 23, 2014
Publication date	Apr 28, 2016
Grant date	—

Abstract

A liquid crystal display includes: a first substrate; a gate line and a data line disposed on the first substrate; a thin film transistor connected to the gate line and the data line; a pixel electrode positioned on the first substrate, connected to the thin film transistor, configured to be applied with a first voltage, and including a first sub-pixel electrode including a first sub-region and a second sub-region and a second sub-pixel electrode configured to be applied with a second voltage; a protrusion electrode protruding from the pixel electrode to overlap the data line; and an insulating layer positioned on the first sub-region of the first sub-pixel electrode and positioned under the second sub-pixel electrode and the second sub-region of the first sub-pixel electrode, wherein the first sub-region of the first sub-pixel electrode overlaps the second sub-pixel electrode.

First claim

What is claimed is:

1 . A liquid crystal display comprising:
a first substrate; a gate line and a data line disposed on the first substrate; a thin film transistor connected to the gate line and the data line; a pixel electrode positioned on the first substrate, connected to the thin film transistor, configured to be applied with a first voltage, and including a first sub-pixel electrode including a first sub-region and a second sub-region and a second sub-pixel electrode configured to be applied with a second voltage; a protrusion electrode protruding from the pixel electrode to overlap the data line; an insulating layer positioned on the first sub-region of the first sub-pixel electrode and positioned under the second sub-pixel electrode and the second sub-region of the first sub-pixel electrode; a second substrate facing the first substrate; a common electrode positioned on the second substrate and configured to he applied with a common voltage; and a liquid crystal layer positioned between first substrate and the second substrate, wherein the first sub-region of the first sub-pixel electrode overlaps the second sub-pixel electrode.

2 . The liquid crystal display of claim 1 , wherein
a difference between the first voltage and the common voltage is larger than a difference between the second voltage and the common voltage.

3 . The liquid crystal display of claim 1 , wherein
the protrusion electrode protrudes from the first sub-region of the first sub-pixel electrode.

4 . The liquid crystal display of claim 1 , wherein
the protrusion electrode is formed with a trapezoid shape.

5 . The liquid crystal display of claim 1 , wherein
the protrusion electrode includes a first protrusion electrode protruding from the first sub-region of the first sub-pixel electrode and a second protrusion electrode protruding from the second sub-pixel electrode.

6 . The liquid crystal display of claim 1 , wherein
the protrusion electrode protrudes from the second sub-pixel electrode.

7 . The liquid crystal display of claim 1 , further comprising
a light blocking member overlapping the gate line, the data line, and the protrusion electrode.

8 . The liquid crystal display of claim 7 , wherein
the light blocking member is disposed on the first substrate or the second substrate.

9 . The liquid crystal display of claim 1 , wherein
the pixel electrode is formed as a quadrangle, the second sub-region of the first sub-pixel electrode is positioned at a center of the pixel electrode and is entirely formed with a rhombus shape, the first sub-region of the first sub-pixel electrode includes a plate electrode part made of four parallelograms enclosing the second sub-region and a bar electrode part overlapping the second sub-region and connected to the plate electrode part, and the second sub-pixel electrode is entirely formed of four trapezoid shapes enclosing the second sub-region of the first sub-pixel electrode.

10 . The liquid crystal display of claim 9 , wherein
the protrusion electrode protrudes from the first sub-region of the first sub-pixel electrode.

11 . The liquid crystal display of claim 10 , wherein
the protrusion electrode is formed with a trapezoid shape haying an upper edge and a lower edge parallel to the data line and an oblique edge extending on a same line as one edge of the first sub-region of the first sub-pixel electrode.

12 . The liquid crystal display of claim 10 , wherein
the protrusion electrode is formed with a trapezoid shape having an upper edge and a lower edge parallel to the data line and an oblique edge extending to be inclined from one edge of the first sub-region of the first sub-pixel electrode.

13 . The liquid crystal display of claim 12 , wherein
a length of the upper edge is the same as the width of the bar electrode part.

14 . The liquid crystal display of claim 9 , wherein
the protrusion electrode includes a first protrusion electrode protruding from the first sub-region of the first sub-pixel electrode and a second protrusion electrode protruding from the second sub-pixel electrode.

15 . The liquid crystal display of claim 14 , wherein
the first protrusion electrode and the second protrusion electrode overlap each other.

16 . The liquid crystal display of claim 15 , wherein
the first protrusion electrode is formed of a polygon including two edges parallel to the data line and an edge extending on the same line as one edge of the first sub-region of the first sub-pixel electrode.

17 . The liquid crystal display of claim 16 , wherein
the second sub-pixel electrode includes an outer electrode positioned at an edge of the pixel electrode and branch electrodes extending in different directions from the outer electrode, and the second protrusion electrode extends on a same line as the branch electrodes.

18 . The liquid crystal display of claim 9 , wherein
the protrusion electrode protrudes from the second sub-pixel electrode.

19 . The liquid crystal display of claim 18 , wherein
the second sub-pixel electrode includes an outer electrode positioned at an edge of the pixel electrode and branch electrodes extending in the different directions from the outer electrode, and the protrusion electrode is symmetrical to a slit positioned between the branch electrodes.

20 . The liquid crystal display of claim 18 , wherein
the protrusion electrode is formed with a trapezoid shape including an upper edge and a lower edge parallel to the data line and an oblique edge extending on a same line as one edge of the first sub-region of the first sub-pixel electrode.

Assignees

• Samsung Display Co Ltd

Inventors

• Jung Jae Hoon
• Shin Ki Chul
• Yang Dan Bi
• Han Min Joo
• Hong Ji Phyo

Classifications

• H10D30/67

  Thin-film transistors [TFT] {(Stacked nanowire, nanosheet or nanoribbon FETs H10D30/501)} · CPC title

• G02F1/1368

  in which the switching element is a three-electrode device {(G02F1/136277 takes precedence)} · CPC title

• G02F1/136209

  Light shielding layers, e.g. black matrix, incorporated in the active matrix substrate, e.g. structurally associated with the switching element · CPC title

• G02F1/134336 Primary

  Matrix · CPC title

• G02F1/133345

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