Liquid crystal display device and electronic device
View Patent ↗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.
1. A liquid crystal display device comprising:
a transistor over a substrate;
a first insulating film over the transistor;
a first conductive film electrically connected to the transistor;
a second conductive film over the substrate;
a liquid crystal over the first conductive film and the second conductive film;
a second insulating film between the first conductive film and the second conductive film; and
a wiring electrically connected to the second conductive film, wherein the wiring and a gate of the transistor are provided on a same surface,
wherein the second conductive film overlaps with an entire region of a channel formation region of the transistor,
wherein an orientation of the liquid crystal is configured to be controlled by an electric field between the first conductive film and the second conductive film, and
wherein the first conductive film is in direct contact with the transistor.
2. The liquid crystal display device according to claim 1 , wherein the second conductive film is provided over an entire surface of one side of the substrate.
3. The liquid crystal display device according to claim 1 , wherein the second insulating film is provided over the second conductive film.
4. The liquid crystal display device according to claim 1 , wherein the transistor is provided over the second insulating film.
5. The liquid crystal display device according to claim 1 , wherein the transistor comprises a semiconductor layer comprising indium, gallium, and zinc.
6. The liquid crystal display device according to claim 1 , wherein the first conductive film comprises a slit.
7. The liquid crystal display device according to claim 1 , wherein the first insulating film is provided between the first conductive film and the second conductive film.
8. The liquid crystal display device according to claim 1 , wherein the first conductive film is provided over the second conductive film.
9. A liquid crystal display device comprising:
a transistor over a substrate;
a first insulating film over the transistor;
a first conductive film electrically connected to the transistor through a contact hole in the first insulating film;
a second conductive film over the substrate;
a liquid crystal over the first conductive film and the second conductive film;
a second insulating film between the first conductive film and the second conductive film;
a first wiring electrically connected to the second conductive film, wherein the first wiring and a gate of the transistor are provided on a same surface; and
a second wiring electrically connected to the transistor,
wherein the second conductive film overlaps with an entire region of a channel formation region of the transistor,
wherein an orientation of the liquid crystal is configured to be controlled by an electric field between the first conductive film and the second conductive film,
wherein the second wiring is wound,
wherein an outline of the first conductive film is wound along a wind of the second wiring, and
wherein the first conductive film is in direct contact with the transistor.
10. The liquid crystal display device according to claim 9 , wherein the second conductive film is provided over an entire surface of one side of the substrate.
11. The liquid crystal display device according to claim 9 , wherein the second insulating film is provided over the second conductive film.
12. The liquid crystal display device according to claim 9 , wherein the transistor is provided over the second insulating film.
13. The liquid crystal display device according to claim 9 , wherein the transistor comprises a semiconductor layer comprising indium, gallium, and zinc.
14. The liquid crystal display device according to claim 9 , wherein the first conductive film comprises a slit.
15. The liquid crystal display device according to claim 9 , wherein the first insulating film is provided between the first conductive film and the second conductive film.
16. The liquid crystal display device according to claim 9 , wherein the first conductive film is provided over the second conductive film.
17. A liquid crystal display device comprising:
a first conductive film over a substrate;
a transistor overlapping with the first conductive film with a first insulating film interposed therebetween;
a second conductive film overlapping with the transistor with a second insulating film interposed therebetween, wherein the second conductive film is electrically connected to the transistor through a contact hole in the second insulating film;
a liquid crystal over the first conductive film and the second conductive film with a third insulating film interposed therebetween; and
a wiring electrically connected to the first conductive film, wherein the wiring and a gate of the transistor are provided on a same surface,
wherein an orientation of the liquid crystal is configured to be controlled by an electric field between the first conductive film and the second conductive film, and
wherein the second conductive film is in direct contact with the transistor.
18. The liquid crystal display device according to claim 17 , wherein the first conductive film is provided over an entire surface of one side of the substrate.
19. The liquid crystal display device according to claim 17 , wherein the first insulating film is provided over the first conductive film.
20. The liquid crystal display device according to claim 17 , wherein the transistor is provided over the first insulating film.
21. The liquid crystal display device according to claim 17 , wherein the transistor comprises a semiconductor layer comprising indium, gallium, and zinc.
22. The liquid crystal display device according to claim 17 , wherein the second conductive film comprises a slit.
23. The liquid crystal display device according to claim 17 , wherein the third insulating film is an alignment film.
24. The liquid crystal display device according to claim 17 , wherein the second conductive film is provided over the first conductive film.