Display device, input/output device, and semiconductor device

A display device comprising a plurality of pixels, each pixel comprising:

• a reflective display element;
• a light-emitting element over the reflective display element;
• a first transistor electrically connected to the reflective display element;
• and
• a second transistor electrically connected to the light-emitting element,
• wherein the light-emitting element is provided closer to a display surface of the display device than the reflective display element,
• wherein the first transistor and the second transistor are provided between the reflective display element and the light-emitting element,
• wherein the reflective display element comprises a unit configured to adjust an amount of light, the unit changing its arrangement based on electric power supplied from an electrode, and
• wherein the reflective display element is configured to change an intensity of reflected light by partially blocking the light with the unit.

A display device comprising a plurality of pixels, each pixel comprising:

• a reflective display element;
• a light-emitting element overlapping with the reflective display element;
• a first transistor electrically connected to the reflective display element;
• and
• a second transistor electrically connected to the light-emitting element,
• wherein the light-emitting element is provided closer to a display surface of the display device than the reflective display element,
• wherein the first transistor and the second transistor are provided between the reflective display element and the light-emitting element,
• wherein the reflective display element comprises:
• a light-reflective layer;
• and
• a layer configured to adjust an amount of light, the layer being provided over the light-reflective layer, and
• wherein the reflective display element is configured to change an intensity of light reflected by the light-reflective layer using the layer.

A display device comprising a plurality of pixels, each pixel comprising:

• a reflective display element;
• a light-emitting element overlapping with the reflective display element;
• a first transistor electrically connected to the reflective display element;
• and
• a second transistor electrically connected to the light-emitting element,
• wherein the light-emitting element is provided closer to a display surface of the display device than the reflective display element,
• wherein a part of the first transistor is overlapped with a part of the second transistor,
• wherein the reflective display element comprises:
• a light-reflective layer;
• and
• a layer configured to adjust an amount of light, the layer being provided over the light-reflective layer, and
• wherein the reflective display element is configured to change an intensity of light reflected by the light-reflective layer using the layer.