Reflector for a light emitting device
AssigneeSemiconductor Energy Laboratory Co., Ltd.
InventorGen Fujii
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Abstract
A light-emitting device is disclosed with improved luminance even with increased arrangement density of a reflector regardless of a light-emitting region. The disclosed device includes a reflector between an electrode for extracting light from a layer including a luminescent material, which serves as a light-emitting region of a light-emitting element, and an exterior space (air). In addition, a light-extraction efficiency can be improved by setting an angle made by a surface of the reflector, which faces the light-emitting element, and a side surface of the reflector (hereinafter, referred to as a slope angle of the reflector) in a predetermined range as for a shape of the reflector.
Claims16
A light-emitting device comprising:
- a substrate;
- a first insulating film over the substrate;
- a second insulating film over the first insulating film;
- a light-emitting element over the second insulating film, the light-emitting element comprising:
- a first transparent electrode;
- a layer including a luminescent material;
- and
- a second electrode,
- wherein a reflector having an opening is provided between the first insulating film and the second insulating film.
A light-emitting device comprising:
- a substrate;
- a first insulating film having a groove over the substrate;
- a reflector filling the groove of the first insulating film over the first insulating film;
- a second insulating film over the first insulating film and the reflector;
- a first electrode over the second insulating film;
- a layer including a luminescent material over the first electrode;
- and
- a second electrode over the layer including the luminescent material,
- wherein the first insulating film is in contact with the second insulating film.
Dependencies are inferred from the claim text.