Liquid crystal display apparatus

Patent metadata

Field	Value
Publication number	US-9664972-B2
Application number	US-201514807490-A
Country	US
Kind code	B2
Filing date	Jul 23, 2015
Priority date	Jul 24, 2014
Publication date	May 30, 2017
Grant date	May 30, 2017

Abstract

A lateral electric field type liquid crystal display apparatus includes a first substrate on which pixels are disposed in a matrix shape, each of the pixels including a plurality of signal wirings and a plurality of scanning wirings which intersect each other, a switching element provided in a region adjacent to a portion in which the signal wiring and the scanning wiring intersect or on the scanning wiring, a pixel electrode connected to the switching element, and a counter electrode to which a common potential is supplied from a common potential wiring; a second substrate provided to face the first substrate; and a liquid crystal provided between the first and second substrates, wherein a first electric field shield electrode, which is set to the common potential, is provided between the signal wiring and the first substrate, and the first electric field shield electrode is electrically connected with a first wiring which supplies the common potential to the first electric field shield electrode, within a display region, and an electric field substantially parallel to the first substrate is applied between the pixel electrode and the counter electrode.

First claim

What is claimed is:

1. A lateral electric field type liquid crystal display apparatus, comprising:
a first substrate on which pixels are disposed in a matrix shape, each of the pixels including a plurality of signal wirings and a plurality of scanning wirings which intersect each other, a switching element provided in a region adjacent to a portion in which the signal wiring and the scanning wiring intersect or on the scanning wiring, a pixel electrode connected to the switching element, and a counter electrode to which a common potential is supplied from a common potential wiring;
a second substrate which is provided to face the first substrate; and
a liquid crystal which is provided between the first substrate and the second substrate,
wherein a first electric field shield electrode, which is set to the common potential, is provided between the signal wiring and the first substrate, and the first electric field shield electrode is electrically connected with a first wiring which supplies the common potential to the first electric field shield electrode, only outside a display region in which the pixels are disposed in a matrix shape, and
an electric field substantially parallel to the first substrate is applied between the pixel electrode and the counter electrode.

2. The liquid crystal display apparatus according to claim 1 ,
wherein a second electric field shield electrode, to which the common potential is supplied from the common potential wiring, is provided so as to be superposed on the signal wiring through an insulation film between the signal wiring and the liquid crystal.

3. The liquid crystal display apparatus according to claim 1 ,
wherein the switching element is an inverse staggered type TFT element, the first electric field shield electrode is disposed between the scanning wiring and the first substrate, and an insulation film is provided between the scanning wiring and the first electric field shield electrode.

4. The liquid crystal display apparatus according to claim 3 ,
wherein the insulation film comprises at least a silicon oxide film.

5. The liquid crystal display apparatus according to claim 3 ,
wherein the first wiring is provided in a direction in which the signal wiring extends.

6. The liquid crystal display apparatus according to claim 3 ,
wherein the first wiring is provided in both of a direction in which the signal wiring extends and a direction in which the scanning wiring extends.

7. The liquid crystal display apparatus according to claim 3 ,
wherein the first electric field shield electrode covers the signal wiring, when viewed from a normal direction of the first substrate.

Assignees

• Nlt Technologies Ltd

Inventors

• Sasaki Takeshi
• Inada Satoshi

Classifications

• G02F1/1368

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

• G02F1/134363

  for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS] · CPC title

• G02F2001/136218

  Physics · mapped topic

• G02F1/136286 Primary

  Wiring, e.g. gate line, drain line · CPC title

• G02F1/136227

  Through-hole connection of the pixel electrode to the active element through an insulation layer · CPC title