Light emitting device and projector
AssigneeSeiko Epson Corporation
InventorMasamitsu Mochizuki
Life of this patent
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Abstract
A light emitting device includes a first layer that generates light by injection of a current and forms a waveguide of the light, and an electrode that injects the current into the first layer, wherein the waveguide of the light has a belt-like first region and a belt-like second region, the first region has a first part with curvature, the second region has a second part with curvature, the first region and the second region are connected in a reflection part provided on a side surface of the first layer, and a first light output from the first region on a side surface of the first layer as an output surface opposed to the side surface on which the reflection part is provided and a second light output from the second region on the output surface are output in the same direction.
Claims20
A light emitting device comprising:
- a first layer that generates light by injection current and forms a waveguide of the light;
- a second layer and a third layer that sandwich the first layer and suppress leakage of the light;
- and
- an electrode that injects the current into the first layer,
- wherein the waveguide of the light obtained by the electrode has a belt-like first region and a belt-like second region,
- the first region has a first part with curvature,
- the second region has a second part with curvature,
- the first region and the second region are connected in a reflection part provided on a side surface of the first layer, and
- a first light is output from the first region on an output surface which is a side surface of the first layer opposed to the side surface on which the reflection part is provided,
- a second light is output from the second region on the output surface, and
- the first and second light are output in the same direction.
A light emitting device comprising a multilayered structure having a first layer, and a second layer and a third layer that sandwich the first layer,
- the first layer having a first gain region and a second gain region that generate and guide lights,
- the second layer and the third layer being layers that suppress leakage of the lights generated in the first gain region and the second gain region,
- the first layer having a first surface and a second surface forming an outer shape of the multilayered structure and opposed to each other,
- in a wavelength range of the lights generated in the first gain region and the second gain region, reflectance of the first surface being higher than reflectance of the second surface,
- the first gain region and the second region being provided from the first surface to the second surface,
- the first gain region being connected to the first surface and tilted in a first direction with respect to a perpendicular of the first surface as seen from a stacking direction of the multilayered structure,
- the second gain region being connected to the first surface and tilted in a second direction with respect to the perpendicular as seen from the stacking direction of the multilayered structure,
- the first gain region and the second gain region being connected to the second surface in the same direction as seen from the stacking direction of the multilayered structure,
- an end surface at the first surface side of the first gain region and an end surface at the first surface side of the second gain region overlapping on the first surface,
- the first gain region having a first gain part with first curvature as seen from the stacking direction of the multilayered structure, and
- the second gain region having a second gain part with second curvature as seen from the stacking direction of the multilayered structure.
Dependencies are inferred from the claim text.