Patent ID: 9105764
Filing Date: 2015-08-11
Classification: G02B,G03B,H01L

Abstract:
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.