Display device

A display device comprising:

• a pixel comprising a first subpixel, a second subpixel, a third subpixel, and a fourth subpixel,
• wherein the first subpixel is configured to control transmission of a red light and comprises a first opening for transmitting the red light,
• wherein the second subpixel is configured to control transmission of a green light and comprises a second opening for transmitting the green light,
• wherein the third subpixel is configured to control transmission of a blue light and comprises a third opening for transmitting the blue light,
• wherein the fourth subpixel is configured to control transmission of a white light and comprises a fourth opening for transmitting the white light,
• wherein the fourth opening has the smallest area of the first opening, the second opening, the third opening, and the fourth opening,
• wherein each of the first subpixel, the second subpixel, the third subpixel, and the fourth subpixel comprises a transistor and a capacitor,
• wherein the transistor comprises an oxide semiconductor film,
• wherein the capacitor comprises a first electrode comprising a metal oxide film and a second electrode comprising a light-transmitting conductive film,
• wherein an inorganic insulating film is over the transistor and over and in contact with the metal oxide film, and
• wherein the light-transmitting conductive film is over the inorganic insulating film and electrically connected to the transistor.

A display device comprising:

• a pixel comprising a first subpixel, a second subpixel, a third subpixel, and a fourth subpixel;
• a first wiring;
• a second wiring;
• a third wiring;
• a fourth wiring;
• and
• a fifth wiring,
• wherein the first subpixel is configured to control transmission of a first light and comprises a first opening for transmitting the first light,
• wherein the second subpixel is configured to control transmission of a second light and comprises a second opening for transmitting the second light,
• wherein the third subpixel is configured to control transmission of a third light and comprises a third opening for transmitting the third light,
• wherein the fourth subpixel is configured to control transmission of a fourth light and comprises a fourth opening for transmitting the fourth light,
• wherein the first light, the second light, the third light, and the fourth light are different from each other in color,
• wherein the fourth opening has the smallest area of the first opening, the second opening, the third opening, and the fourth opening,
• wherein each of the first subpixel, the second subpixel, the third subpixel, and the fourth subpixel comprises a transistor and a capacitor,
• wherein the transistor comprises an oxide semiconductor film,
• wherein the capacitor comprises a first electrode comprising a metal oxide film and a second electrode comprising a light-transmitting conductive film,
• wherein an inorganic insulating film is over the transistor and over and in contact with the metal oxide film,
• wherein the light-transmitting conductive film is over the inorganic insulating film and electrically connected to the transistor,
• wherein the first wiring is electrically connected to one of a source and a drain of the transistor of each of the first subpixel and the second subpixel,
• wherein the second wiring is electrically connected to one of a source and a drain of the transistor of each of the third subpixel and the fourth subpixel,
• wherein the third wiring is electrically connected to a gate of the transistor of each of the first subpixel and the third subpixel,
• wherein the fourth wiring is electrically connected to a gate of the transistor of each of the second subpixel and the fourth subpixel, and
• wherein the fifth wiring is electrically connected to the second electrode of the capacitor.