Liquid crystal display device

Patent metadata

Field	Value
Publication number	US-2016377932-A1
Application number	US-201614990904-A
Country	US
Kind code	A1
Filing date	Jan 8, 2016
Priority date	Jun 26, 2015
Publication date	Dec 29, 2016
Grant date	—

Abstract

A liquid crystal display device includes, a first insulation substrate, a first subpixel electrode disposed on the first insulation substrate, an insulation layer disposed on the first subpixel electrode, a second subpixel electrode disposed on the insulation layer, a liquid crystal layer disposed on the second subpixel electrode, a common electrode disposed on the liquid crystal layer, and a second insulation substrate disposed on the common electrode. In the liquid crystal display device, the second subpixel electrode and the common electrode are spaced apart by a second distance in a second region in which the second subpixel electrode is disposed, the first subpixel electrode and the common electrode are spaced apart by a first distance in a first region in which the first subpixel electrode is disposed, excluding the second region, and the first distance and the second distance are different from each other.

First claim

What is claimed is:

1 . A liquid crystal display device comprising:
a first insulation substrate; a first subpixel electrode disposed on the first insulation substrate; an insulation layer disposed on the first subpixel electrode; a second subpixel electrode disposed on the insulation layer; a liquid crystal layer disposed on the second subpixel electrode; a common electrode disposed on the liquid crystal layer; and a second insulation substrate disposed on the common electrode, wherein the second subpixel electrode and the common electrode are spaced apart by a second distance in a second region in which the second subpixel electrode is disposed, the first subpixel electrode and the common electrode are spaced apart by a first distance in a first region in which the first subpixel electrode is disposed, and the first distance and the second distance are different from each other.

2 . The liquid crystal display device of claim 1 , wherein the first distance is longer than the second distance.

3 . The liquid crystal display device of claim 2 , wherein, when a same voltage is applied to the first subpixel electrode and the second subpixel electrode, an intensity of an electric field generated in the liquid crystal layer in the first region is less than an intensity of an electric field generated in the liquid crystal layer in the second region.

4 . The liquid crystal display device of claim 3 , wherein
the liquid crystal layer comprises a plurality of liquid crystal molecules, and when the same voltage is applied to the first subpixel electrode and the second subpixel electrode, an angle between major axes of the liquid crystal molecules in the first region and an axis vertical to the first insulation substrate is smaller than an angle between major axes of the liquid crystal molecules in the second region and the axis vertical to the first insulation substrate.

5 . The liquid crystal display device of claim 3 , wherein, when the same voltage is applied to the first subpixel electrode and the second subpixel electrode, the first region displays brightness darker than brightness in the second region.

6 . The liquid crystal display device of claim 2 , wherein the first subpixel electrode is electrically connected to the second subpixel electrode.

7 . The liquid crystal display device of claim 1 , wherein the insulation layer comprises a color filter which passes only light in a predetermined wavelength range.

8 . The liquid crystal display device of claim 7 , further comprising:
a passivation layer interposed between the insulation layer and the second subpixel electrode.

9 . The liquid crystal display device of claim 7 , wherein a ratio between a thickness of the insulation layer and a thickness of the liquid crystal layer is about 1:1.

10 . The liquid crystal display device of claim 1 , wherein the first subpixel electrode and the second subpixel electrode are electrically connected to each other through a contact hole defined through the insulation layer.

11 . The liquid crystal display device of claim 10 , wherein the first subpixel electrode and the second subpixel electrode do not overlap each other except in a region in which the contact hole is disposed.

12 . The liquid crystal display device of claim 1 , further comprising:
a switching element interposed between the first insulation substrate and the first subpixel electrode, wherein the switching element comprises a control terminal electrically connected to a gate line extending in a first direction, an input terminal electrically connected to a data line extending in a second direction, and an output terminal electrically connected to at least one of the first subpixel electrode and the second subpixel electrode.

13 . The liquid crystal display device of claim 12 , wherein
the output terminal of the switching element further comprise a protrusion, wherein the protrusion is disposed adjacent to at least one of the first subpixel electrode and the second subpixel electrode.

14 . The liquid crystal display device of claim 12 , wherein
the output terminal of the switching element is physically connected to the second subpixel electrode, and the second subpixel electrode is physically connected to the first subpixel electrode.

15 . The liquid crystal display device of claim 1 , wherein each of the first subpixel electrode and the second subpixel electrode comprises a stem disposed in a central region and a plurality of branches extending in four different directions from the stem.

16 . A method of fabricating a liquid crystal display device, the method comprising:
preparing a first insulation substrate; providing a first subpixel electrode on the first insulation substrate; providing an insulation layer on the first subpixel electrode; and providing a second subpixel electrode on the insulation layer, wherein the first subpixel electrode and the second subpixel electrode are in different layers from each other.

17 . The method of claim 16 , wherein the providing the insulation layer comprises providing a color filter which passes only light in a predetermined wavelength range.

18 . The method of claim 17 , further comprising:
providing a passivation layer on the insulation layer, wherein the providing the second subpixel electrode comprises providing the second subpixel electrode on the passivation layer.

19 . The method of claim 16 , further comprising:
forming a contact hole through the insulation layer prior to providing the second subpixel electrode, wherein the providing the second subpixel electrode comprises electrically connecting the second subpixel electrode to the first subpixel electrode through the contact hole.

20 . The method of claim 16 , further comprising:
providing a gate line extending in a first direction on the first insulation substrate; providing a data line extending in a second direction on the first insulation substrate; and providing a switching element an input terminal of which is connected to the data line and a control terminal of which is connected to the gate line on the first insulation substrate, wherein forming the first subpixel electrode enables the first subpixel electrode to be connected to the output terminal of the switching element.

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Hoon
• Kim Kyeong Jong
• Shin Ki Chul

Classifications

• G02F1/133345

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

• G02F1/134309 Primary

  characterised by their geometrical arrangement · CPC title

• G02F2001/136295

  Physics · mapped topic

• G02F1/133514

  Colour filters · CPC title

• G02F1/1368

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