Patent ID: 11917882
Assignee: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Field: Organic fine chemistry (Chemistry)
Classification: CPC H  C  Y | IPC C  H

Claim 0:
1. A light-emitting device with a bottom emission structure, comprising:
a substrate;
a transistor comprising:
a first insulating layer over the substrate;
an oxide semiconductor layer over the first insulating layer;
a source electrode, a drain electrode, and a gate electrode over the oxide semiconductor layer; and
a second insulating layer over the oxide semiconductor layer, the source electrode, and the drain electrode;

an anode over the transistor;
a first light-emitting element configured to emit light through a first coloring layer so that blue light is extracted to an outside of the light-emitting device;
a second light-emitting element configured to emit light through a second coloring layer so that green light is extracted to the outside of the light-emitting device;
a third light-emitting element configured to emit light through a third coloring layer so that green light is extracted to the outside of the light-emitting device; and
a fourth light-emitting element,
wherein:
one of the source electrode and the drain electrode is electrically connected to the anode,
the anode is configured to function as a first electrode of one of the first to fourth light-emitting elements,
the first to fourth light-emitting elements comprise the same structure of a first EL layer and a second EL layer with a charge-generation layer therebetween,
the first EL layer includes a fluorescent substance configured to emit blue light, and
the second EL layer includes a phosphorescent substance configured to emit yellow light.