Display device
A transistor includes a gate electrode over a substrate, an oxide semiconductor film overlapping with the gate electrode, a gate insulating film in contact with one surface of the oxide semiconductor film, and a pair of conductive films in contact with the oxide semiconductor film. A capacitor includes a metal oxide film over the gate insulating film and in contact with one of the pair of conductive films, an inorganic insulating film, and a first light-transmitting conductive film over the inorganic insulating film. A first gate line serving also as a gate electrode is connected so as to be able to select three sub-pixels of four sub-pixels, and a second gate line is connected so as to be able to select the remaining one of the four sub-pixels and also one sub-pixel in the next row.
1. A display device comprising:
a first pixel;
a second pixel;
a first wiring;
a second wiring;
a third wiring; and
a first light-transmitting conductive film overlapping the first wiring, the second wiring and the third wiring,
wherein each of the first pixel and the second pixel comprises a first sub-pixel, a second sub-pixel, a third sub-pixel, and a fourth sub-pixel, each subpixel comprising a transistor and a capacitor,
wherein the capacitor of each subpixel comprises a metal oxide film and a part of the first light-transmitting conductive film with an inorganic insulating film between the metal oxide film and the part of the first light-transmitting conductive film,
wherein the first wiring is electrically connected to a gate electrode of the transistor of the first sub-pixel of the first pixel, a gate of the transistor of the second sub-pixel of the first pixel, and a gate of the transistor of the third sub-pixel of the first pixel,
wherein the second wiring is electrically connected to a gate of the transistor of the fourth sub-pixel of the first pixel and a gate of the transistor of the fourth sub-pixel of the second pixel, and
wherein the third wiring is electrically connected to one of a source and a drain of the transistor of the fourth sub-pixel of the first pixel, one of a source and a drain of the transistor of the second sub-pixel of the first pixel and one of a source and a drain of the transistor of the second sub-pixel of the second pixel.
2. The display device according to claim 1 , further comprising:
an organic insulating film over the inorganic insulating film; and
a pixel electrode over the organic insulating film, the pixel electrode being electrically connected to the transistor of the first sub-pixel of the first pixel,
wherein the transistor of the first sub-pixel of the first pixel is over a substrate,
wherein the transistor of the first sub-pixel of the first pixel comprises:
the gate electrode over the substrate;
a gate insulating film over the gate electrode;
an oxide semiconductor film over the gate insulating film, the oxide semiconductor film overlapping the gate electrode; and
a pair of conductive films over the oxide semiconductor film,
wherein the pixel electrode is formed using a second light-transmitting conductive film and is in contact with the one of the pair of conductive films.
3. The display device according to claim 2 ,
wherein the inorganic insulating film comprises:
an oxide insulating film in contact with the oxide semiconductor film; and
a nitride insulating film over the oxide insulating film.
4. The display device according to claim 3 ,
wherein the metal oxide film is in contact with the nitride insulating film and comprises a same metal element as the oxide semiconductor film.
5. The display device according to claim 2 ,
wherein the oxide semiconductor film comprises an In—Ga oxide, an In—Zn oxide, or an In-M-Zn oxide, and
wherein M represents Al, Ti, Ga, Y, Zr, La, Ce, Nd, Sn, or Hf.
6. The display device according to claim 2 ,
wherein the oxide semiconductor film has a multilayer structure comprising a first film and a second film, and
wherein an atomic ratio of a metal element of the first film is different from an atomic ratio of the metal element of the second film.
7. A display device comprising:
a first pixel;
a second pixel;
a first wiring;
a second wiring;
a third wiring; and
a first light-transmitting conductive film overlapping the first wiring, the second wiring and the third wiring,
wherein each of the first pixel and the second pixel comprises a first sub-pixel, a second sub-pixel, a third sub-pixel, and a fourth sub-pixel, each subpixel comprising a transistor and a capacitor,
wherein the capacitor of each subpixel comprises a metal oxide film and a part of the first light-transmitting conductive film with an inorganic insulating film between the metal oxide film and the part of the first light-transmitting conductive film,
wherein the first wiring is electrically connected to a gate electrode of the transistor of the first sub-pixel of the first pixel, a gate of the transistor of the second sub-pixel of the first pixel, and a gate of the transistor of the third sub-pixel of the first pixel,
wherein the second wiring is electrically connected to a gate of the transistor of the fourth sub-pixel of the first pixel and a gate of the transistor of the fourth sub-pixel of the second pixel,
wherein the third wiring is electrically connected to one of a source and a drain of the transistor of the fourth sub-pixel of the first pixel, one of a source and a drain of the transistor of the second sub-pixel of the first pixel and one of a source and a drain of the transistor of the second sub-pixel of the second pixel,
wherein the third wiring extends in a direction,
wherein the first sub-pixel of the first pixel comprises a first pixel electrode between the first wiring and the second wiring in the direction,
wherein the second sub-pixel of the first pixel comprises a second pixel electrode between the first wiring and the second wiring in the direction,
wherein the third sub-pixel of the first pixel comprises a third pixel electrode between the first wiring and the second wiring in the direction, and
wherein the fourth sub-pixel of the first pixel comprises a fourth pixel electrode between the third pixel electrode and the second wiring in the direction.
8. The display device according to claim 7 , further comprising:
an organic insulating film over the inorganic insulating film; and
a pixel electrode over the organic insulating film, the pixel electrode being electrically connected to the transistor of the first sub-pixel of the first pixel,
wherein the transistor of the first sub-pixel of the first pixel is over a substrate,
wherein the transistor of the first sub-pixel of the first pixel comprises:
the gate electrode over the substrate;
a gate insulating film over the gate electrode;
an oxide semiconductor film over the gate insulating film, the oxide semiconductor film overlapping the gate electrode; and
a pair of conductive films over the oxide semiconductor film,
wherein the pixel electrode is formed using a second light-transmitting conductive film and is in contact with the one of the pair of conductive films.
9. The display device according to claim 8 ,
wherein the inorganic insulating film comprises:
an oxide insulating film in contact with the oxide semiconductor film; and
nitride insulating film over the oxide insulating film.
10. The display device according to claim 9 ,
wherein the metal oxide film is in contact with the nitride insulating film and comprises a same metal element as the oxide semiconductor film.
11. The display device according to claim 8 ,
wherein the oxide semiconductor film comprises an In—Ga oxide, an In—Zn oxide, or an In-M-Zn oxide, and
wherein M represents Al, Ti, Ga, Y, Zr, La, Ce, Nd, Sn, or Hf.
12. The display device according to claim 8 ,
wherein the oxide semiconductor film has a multilayer structure comprising a first film and a second film, and
wherein an atomic ratio of a metal element of the first film is different from an atomic ratio of the metal element of the second film.