Semiconductor device and method for manufacturing the semiconductor device

A display device comprising:

• a light-emitting element;
• a transistor comprising a channel region which comprises an oxide semiconductor material;
• and
• a reflective electrode electrically connected to the transistor, the reflective electrode comprising an opening overlapping the light-emitting element so as to allow light emitted by the light-emitting element to pass through the opening,
• wherein the display device is configured to operate at a first refresh rate in a first period and at a second refresh rate in a second period, and
• wherein the second refresh rate is lower than the first refresh rate.

A display device comprising:

• a light-emitting element;
• a display panel comprising a transistor and a reflective electrode electrically connected to the transistor, the transistor comprising a channel region which comprises an oxide semiconductor material;
• and
• a processing circuit configured to determine whether the display panel is operated in a first operation mode at a first refresh rate or a second operation mode at a second refresh rate,
• wherein the reflective electrode comprises an opening overlapping the light-emitting element so as to allow light emitted by the light-emitting element to pass through the opening.

A driving method of a display device comprising:

• a light-emitting element;
• a transistor comprising a channel region which comprises an oxide semiconductor material;
• and
• a reflective electrode electrically connected to the transistor, the reflective electrode comprising an opening overlapping the light-emitting element so as to allow light emitted by the light-emitting element to pass through the opening,
• wherein the display device is configured to operate at a first refresh rate in a first period and at a second refresh rate in a second period, and
• wherein the second refresh rate is lower than the first refresh rate,
• the driving method comprising:
• performing display by using both of external light reflected at the reflective electrode and the light emitted by the light-emitting element.

A driving method of a display device comprising:

• a light-emitting element;
• a transistor comprising a channel region which comprises an oxide semiconductor material;
• and
• a reflective electrode electrically connected to the transistor, the reflective electrode comprising an opening overlapping the light-emitting element so as to allow light emitted by the light-emitting element to pass through the opening,
• wherein the display device is configured to operate at a first refresh rate in a first period and at a second refresh rate in a second period, and
• wherein the second refresh rate is lower than the first refresh rate,
• the driving method comprising:
• performing first display by using external light reflected at the reflective electrode without using the light emitted by the light-emitting element;
• and
• performing second display by using both of external light reflected at the reflective electrode and the light emitted by the light-emitting element.

A display device comprising:

• a light-emitting element;
• a transistor comprising a channel region which comprises an oxide semiconductor material;
• a resin film covering the transistor;
• a reflective electrode electrically connected to the transistor, the reflective electrode comprising a plurality of openings;
• a first structure overlapping a first opening of the plurality of openings, and
• a second structure overlapping a second opening of the plurality of openings,
• wherein each of the first structure and the second structure comprises an entrance portion and an exit portion to extract light emitted from the light-emitting element toward one of the first opening and the second opening,
• wherein an area of the entrance portion is larger than an area of the exit portion, and
• wherein a portion of the resin film is formed between the first structure and the second structure.

A display device comprising:

• a transistor comprising a channel region which comprises an oxide semiconductor material;
• and
• a reflective electrode electrically connected to the transistor, wherein the reflective electrode comprises an uneven upper surface so that incident light is irregularly reflected,
• wherein the display device is configured to operate at a first refresh rate in a first period and at a second refresh rate in a second period, and
• wherein the second refresh rate is lower than the first refresh rate.