Display device, display module, electronic device, and method for manufacturing display device

A display device comprising:

• a substrate;
• an insulating layer;
• a plurality of light-emitting diodes over the substrate, the plurality of light-emitting diodes arranged in a matrix;
• a plurality of transistors each electrically connected to at least one of the plurality of light-emitting diodes;
• and
• a plurality of conductive pastes between the plurality of light-emitting diodes and the plurality of transistors,
• wherein one of the plurality of transistors is electrically connected to the one of the plurality of light-emitting diodes via one of the plurality of conductive pastes,
• wherein the plurality of light-emitting diodes is closer to the substrate than the plurality of transistors is,
• wherein each of the plurality of light-emitting diodes is a micro light-emitting diode,
• wherein an area of a light-emitting region of each of the plurality of light-emitting diodes is less than or equal to 10000 μm2,
• wherein the plurality of light-emitting diodes is configured to emit light toward the substrate,
• wherein each of the plurality of transistors comprises a metal oxide layer, a gate insulating layer, a gate electrode, a first conductive layer, and a second conductive layer,
• wherein the metal oxide layer comprises a first region, a second region, and a third region comprising a channel formation region between the first region and the second region,
• wherein the first conductive layer overlaps with the first region and the second conductive layer overlaps with the second region,
• wherein the first conductive layer and the second conductive layer are apart from each other over the metal oxide layer,
• wherein the insulating layer is over the first conductive layer and the second conductive layer,
• wherein the insulating layer comprises an opening overlapping with the third region,
• wherein the gate insulating layer and the gate electrode are inside the opening, and
• wherein the gate electrode faces the insulating layer with the gate insulating layer therebetween and faces the third region with the gate insulating layer therebetween.