Light emitting device and projector

摘要

A light emitting device includes a first layer that generates light by injection current and forms a waveguide for the light, and an electrode that injects the current into the first layer, wherein the waveguide has a first region, a second region, and a third region, the first region and the second region connect at a first reflection part, the first region and the third region connect at a second reflection part, the second region and the third region extend to an output surface, a longitudinal direction of the first region is parallel to the output surface, and a first light output from the second region at the output surface and a second light output from the third region at the output surface are output in parallel to one another.

主权项

1. An illumination device comprising:
a first layer that generates light by injection current, and forms a waveguide for the light; a second layer and a third layer that sandwich the first layer and suppress leakage of light; and an electrode that injects the current into the first layer, wherein the waveguide has a first region having an elongated shape, an elongated second region, and an elongated third region, the first region and the second region connect at a first reflection part provided at a first side surface of the first layer, the first region and the third region connect at a second reflection part provided at a second side surface of the first layer different from the first side surface, the second region connect at a third side surface of the first layer different from the first side surface and the second side surface, the third region connect at fourth side surface of the first layer different from the first side surface and the second side surface, a longitudinal direction of the first region has equal to or more than a critical angle with respect to a perpendicular of the first reflection part and the second reflection part as seen from the stacking direction, a longitudinal direction of the second region has equal to or more than a critical angle with respect to a perpendicular of the first reflection part as seen from the stacking direction, a longitudinal direction of the third region has equal to or more than a critical angle with respect to a perpendicular of the second reflection part as seen from the stacking direction.