US 10,241,372 B2Granted

Liquid crystal display device

AssigneeJapan Display Inc.

InventorsYasushi Tomioka, Toshimasa Ishigaki, Hidehiro Sonoda, Sumito Ueta

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Abstract

A liquid crystal display device comprising a TFT substrate having pixels each including a common electrode formed on an organic passivation film, an interlayer insulating film formed so as to cover the common electrode, a pixel electrode having a slit and formed on the interlayer insulating film, a through-hole formed in the organic passivation film and the interlayer insulating film, and a source electrode electrically conducted to the pixel electrode via the through-hole. A taper angle at a depth of D/2 of the through-hole is equal to or more than 50 degrees. The pixel electrode covers part of a side wall of the through-hole but does not cover the remaining part of the side wall of the through-hole. This configuration facilitates the alignment film material to flow into the through-hole, thereby solving a thickness unevenness of the alignment film in vicinity of the through-hole.

Claims11

Dependent claims

A liquid crystal display device comprising:

a transistor substrate including;
a thin film transistor having a source electrode,
a gate signal line driving the thin film transistor,
an organic insulating film formed on the thin film transistor and having a through hole which has a side wall,
a common electrode formed on the organic insulating film,
an interlayer insulating film formed on the common electrode,
a pixel electrode formed on the interlayer insulating film, electrically connected to the source electrode via the through hole, and formed of a conductive material,
a counter substrate, and
a liquid crystal layer sandwiched between the transistor substrate and the counter substrate,
wherein the through hole formed in the organic insulating film,
the through hole has a cross-section in which a top face is defined on the side of the counter substrate and a bottom face is defined on the side of the source electrode,
in a cross-section view, the top face of the through hole is greater than a width of the source electrode.

9 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/174,438Filed 30 Oct 2018 · continuation
Priority: JP 2013-2542059 Dec 2013
Published: US 2019/0064619 A128 Feb 2019
Granted: 26 Mar 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

G02F 1/136227
Active matrix addressed cells: through-hole connection of the pixel electrode to the active element through an insulation layer
G02F 1/133345
Constructional arrangements; Manufacturing methods: insulating layers
G02F 1/133512
Filters, e.g. light shielding masks: light shielding layers, e.g. black matrix
G02F 1/1337
Constructional arrangements; Manufacturing methods: surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers

Family

Application14/564,129Parent of this continuation · filed 9 Dec 2014
Application15/343,329Parent of this continuation · filed 4 Nov 2016
US 9,519,196 B2Parent of this continuation · filed 13 Dec 2016
Application15/784,405Parent of this continuation · filed 16 Oct 2017
US 9,817,288 B2Parent of this continuation · filed 14 Nov 2017
Application15/901,945Parent of this continuation · filed 22 Feb 2018
US 9,939,698 B2Parent of this continuation · filed 10 Apr 2018
Application16/005,896Parent of this continuation · filed 12 Jun 2018
US 10,018,885 B1Parent of this continuation · filed 10 Jul 2018
US 2019/0064619 A1Pre-grant publication · published 28 Feb 2019
US 10,146,096 B2Parent of this continuation
US 2015/0160521 A1Published application
US 2017/0075179 A1Published application
US 2018/0046047 A1Published application
US 2018/0180957 A1Published application
US 2018/0292722 A1Published application
US 10,241,372 B2This patent

From the US filing history. Foreign family members aren’t listed.