Liquid crystal display device and display device

Patent metadata

Field	Value
Publication number	US-10353259-B2
Application number	US-201715679913-A
Country	US
Kind code	B2
Filing date	Aug 17, 2017
Priority date	Sep 9, 2014
Publication date	Jul 16, 2019
Grant date	Jul 16, 2019

Abstract

According to one embodiment, a liquid crystal display device includes a first substrate including a semiconductor layer including a first extension portion and a second extension portion, a gate line, a first common electrode opposed to at least the second extension portion, a source line extending above the second extension portion, a pixel electrode including a main pixel electrode, a second common electrode including a second main common electrode opposed to the source line, and a first alignment film.

First claim

What is claimed is:

1. A display device comprising:
a first substrate including a first insulation substrate, a polycrystalline silicon layer, a gate line extending in a first direction, a source line extending in a second direction, a transparent conductive layer formed of indium tin oxide (ITO) or indium zinc oxide (IZO), a first insulation film, and a second insulation film, a third insulation film, and a plurality of pixel electrodes which are arrayed in a matrix in an active area,
wherein
the polycrystalline silicon layer is disposed on the first insulation substrate and is directly covered by a bottom surface of the third insulation film,
the gate line is disposed on a top surface of the third insulation film,
the transparent conductive layer is sandwiched between a top surface of the first insulation film and a bottom surface of the second insulation film,
a bottom surface of the first insulation film directly covers the gate line,
the source line is directly disposed on a top surface of the second insulation film, and
the polycrystalline silicon layer is electrically connected to one of the plurality of pixel electrodes via an opening portion of the transparent conductive layer.

2. The display device according to claim 1 , wherein
the transparent conductive layer is opposed to the plurality of pixel electrodes.

3. The display device according to claim 1 , wherein the transparent conductive layer is opposed to the gate line and the source line.

4. The display device according to claim 2 , wherein the transparent conductive layer is opposed to the gate line and the source line.

5. The display device according to claim 4 , wherein the transparent conductive layer has a common potential.

6. The display device according to claim 1 , wherein
the first substrate further includes a drain electrode disposed on the top surface of the second insulation film, and
the drain electrode is opposed to the opening portion of the transparent conductive layer.

7. The display device according to claim 6 , wherein
the first substrate further includes a metal wiring extending on the top surface of the third insulation film in the first direction, and
the metal wiring is opposed to the transparent conductive layer.

8. The display device according to claim 6 , wherein
the first substrate further includes a common line extending in the second direction, and
the common line is opposed to the source line and electrically connected to the transparent conductive layer.

9. The display device according to claim 8 , wherein
the first substrate further includes a fourth insulation film,
a bottom surface of the fourth insulation film directly covers the source line, and
the common line is disposed on a top surface of the fourth insulation film.

10. The display device according to claim 7 , wherein
the first substrate further includes a common line extending in the first direction, and
the common line is opposed to the metal wiring and electrically connected to the transparent conductive layer.

11. The display device according to claim 10 , wherein
the first substrate further includes a fourth insulation film,
a bottom surface of the fourth insulation film directly covers the source line, and
the common line is disposed on a top surface of the fourth insulation film.

12. The display device according to claim 1 , wherein
the source line includes a source electrode,
the polycrystalline silicon layer is opposed to the source electrode via an opening portion of the transparent conductive layer.

13. The display device according to claim 1 , wherein the first insulation film and the second insulation film are formed of an inorganic material.

14. The display device according to claim 1 , wherein the first, second, and third insulation films are formed of an inorganic material.

15. The display device according to claim 8 , wherein the source line is disposed between the common line and the transparent conductive layer.

16. The display device according to claim 10 , wherein the transparent conductive layer is disposed between the common line and the gate line.

Assignees

• Japan Display Inc

Inventors

• Hirosawa Jin

Classifications

• G02F2001/13606

  Physics · mapped topic

• G02F1/135

  Liquid crystal cells structurally associated with a photoconducting or a ferro-electric layer, the properties of which can be optically or electrically varied {(G02F1/133348 takes precedence)} · CPC title

• G02F2001/1357

  Physics · mapped topic

• G02F1/1337

  Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers · CPC title

• G02F1/133345

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