Liquid crystal display device and electronic device

Patent metadata

Field	Value
Publication number	US-9829761-B2
Application number	US-201514628459-A
Country	US
Kind code	B2
Filing date	Feb 23, 2015
Priority date	Oct 31, 2006
Publication date	Nov 28, 2017
Grant date	Nov 28, 2017

Abstract

To provide a semiconductor device, a liquid crystal display device, and an electronic device which have a wide viewing angle and in which the number of manufacturing steps, the number of masks, and manufacturing cost are reduced compared with a conventional one. The liquid crystal display device includes a first electrode formed over an entire surface of one side of a substrate; a first insulating film formed over the first electrode; a thin film transistor formed over the first insulating film; a second insulating film formed over the thin film transistor; a second electrode formed over the second insulating film and having a plurality of openings; and a liquid crystal over the second electrode. The liquid crystal is controlled by an electric field between the first electrode and the second electrode.

First claim

What is claimed is:

1. A liquid crystal display device comprising:
a substrate;
a common electrode over the substrate;
a wiring electrically connected to the common electrode;
a first conductive film on and in contact with the wiring;
a first insulating film over the common electrode, the wiring, and the first conductive film;
a pixel electrode on and in contact with the first insulating film;
a second conductive film on and in contact with the common electrode, the first conductive film, and the first insulating film;
an alignment film over the pixel electrode and the second conductive film;
a liquid crystal over the alignment film;
a transistor electrically connected to the pixel electrode;
a gate wiring electrically connected to the transistor; and
a source wiring electrically connected to the transistor,
wherein the common electrode overlaps the gate wiring, the wiring, a semiconductor film of the transistor, the source wiring, and the pixel electrode,
wherein the pixel electrode comprise a plurality of openings,
wherein the first insulating film is provided over the transistor,
wherein each of the common electrode, the pixel electrode, and the second conductive film is a light-transmitting conductive film,
wherein the wiring is electrically connected to the common electrode through the first conductive film and the second conductive film, and
wherein an orientation of the liquid crystal is controlled by an electric field between the common electrode and the pixel electrode.

2. The liquid crystal display device according to claim 1 , wherein the common electrode is on and in contact with the substrate.

3. The liquid crystal display device according to claim 1 , wherein the common electrode is provided over an entire surface of one side of the substrate.

4. The liquid crystal display device according to claim 1 , wherein the gate wiring is provided over the semiconductor film with a second insulating film interposed therebetween.

5. The liquid crystal display device according to claim 1 , wherein the transistor is provided over the common electrode with a second insulating film interposed therebetween.

6. The liquid crystal display device according to claim 1 , wherein the source wiring is provided over the common electrode with a second insulating film interposed therebetween.

7. The liquid crystal display device according to claim 1 , wherein the gate wiring is provided over the common electrode with a second insulating film interposed therebetween.

8. The liquid crystal display device according to claim 1 , wherein the wiring is provided over the common electrode with a second insulating film interposed therebetween.

9. The liquid crystal display device according to claim 1 , wherein the first conductive film is provided over the common electrode with a second insulating film interposed therebetween.

10. The liquid crystal display device according to claim 1 , comprising a second insulating film between the source wiring and the semiconductor film.

11. A liquid crystal display device comprising:
a substrate;
a common electrode over the substrate;
a wiring electrically connected to the common electrode;
a first conductive film on and in contact with the wiring;
a first insulating film over the common electrode, the wiring, and the first conductive film;
a pixel electrode on and in contact with the first insulating film;
a second conductive film on and in contact with the common electrode, the first conductive film, and the first insulating film;
an alignment film over the pixel electrode and the second conductive film;
a liquid crystal over the alignment film;
a transistor electrically connected to the pixel electrode;
a gate wiring electrically connected to the transistor; and
a source wiring electrically connected to the transistor,
wherein the common electrode overlaps the gate wiring, the wiring, a semiconductor film of the transistor, the source wiring, and the pixel electrode,
wherein the pixel electrode comprise a plurality of openings,
wherein the first insulating film is provided over the transistor,
wherein each of the common electrode, the pixel electrode, and the second conductive film is a light-transmitting conductive film,
wherein the wiring is electrically connected to the common electrode through the first conductive film and the second conductive film,
wherein an orientation of the liquid crystal is controlled by an electric field between the common electrode and the pixel electrode, and
wherein the semiconductor film comprises indium, gallium, and zinc.

12. The liquid crystal display device according to claim 11 , wherein the common electrode is on and in contact with the substrate.

13. The liquid crystal display device according to claim 11 , wherein the common electrode is provided over an entire surface of one side of the substrate.

14. The liquid crystal display device according to claim 11 , wherein the gate wiring is provided over the semiconductor film with a second insulating film interposed therebetween.

15. The liquid crystal display device according to claim 11 , wherein the transistor is provided over the common electrode with a second insulating film interposed therebetween.

16. The liquid crystal display device according to claim 11 , wherein the source wiring is provided over the common electrode with a second insulating film interposed therebetween.

17. The liquid crystal display device according to claim 11 , wherein the gate wiring is provided over the common electrode with a second insulating film interposed therebetween.

18. The liquid crystal display device according to claim 11 , wherein the wiring is provided over the common electrode with a second insulating film interposed therebetween.

19. The liquid crystal display device according to claim 11 , wherein the first conductive film is provided over the common electrode with a second insulating film interposed therebetween.

20. The liquid crystal display device according to claim 11 , comprising a second insulating film between the source wiring and the semiconductor film.

21. The liquid crystal display device according to claim 11 , wherein the semiconductor film comprises a-InGaZnO.

22. A liquid crystal display device comprising:
a substrate;
a common electrode over the substrate;
a wiring electrically connected to the common electrode;
a first conductive film on and in contact with the wiring;
a first insulating film over the common electrode, the wiring, and the first conductive film;
a pixel electrode on and in contact with the first insulating film;
a second conductive film on and in contact with the common electrode, the first conductive film, and the first insulating film;
an alignment film over the pixel electrode and the second conductive film;
a liquid crystal over the alignment film;
a transistor electrically connected to the pixel electrode;
a gate wiring electrically connected to the transistor; and
a source wiring electrically connected to the transistor,
wherein the common electrode overlaps the gate wiring, the wiring, a semiconductor film of the transistor, the source wiring, and the pixel electrode,
wherein the pixel electrode comprise a plurality of openings,
wherein the first insulating film is provided over the transistor,
wherein each of the common electrode, the pixel electrode, and the second conductive film is a light-transmitting conductive film,
wherein the wiring is electr

Assignees

• Semiconductor Energy Lab

Inventors

• Kimura Hajime

Classifications

• G09G2352/00

  Parallel handling of streams of display data · CPC title

• G09G2320/106

  Determination of movement vectors or equivalent parameters within the image · CPC title

• G02F1/133553

  Reflecting elements (associated to illuminating devices G02F1/133605) · CPC title

• G02F1/13439

  characterised by their electrical, optical, physical properties; materials therefor; method of making · CPC title

• G09G2310/024

  Scrolling of light from the illumination source over the display in combination with the scanning of the display screen · CPC title