Light emitting device, method of manufacturing light emitting device, and image display device
AssigneeSeiko Epson Corporation
InventorTaisuke Yamauchi
Life of this patent
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Abstract
A light emitting device includes a light emitting portion provided on a reference plane to supply light, and an optical portion provided on the output side of the light emitting portion to transmit light from the light emitting portion. In the device, the optical portion is formed so that its refractive index periodically changes in a two-dimensional direction approximately parallel to the reference plane, and the optical portion can be formed separately from the light emitting portion.
Claims14
A light emitting device, comprising:
- a light emitting portion provided on a reference plane to supply light, the light emitting portion having an output side;
- and
- an optical portion having a refractive index, the optical portion provided on the output side of said light emitting portion to transmit light from said light emitting portion, said optical portion being formed so that the refractive index of the optical portion periodically changes in a two-dimensional direction approximately parallel to said reference plane, and the optical portion capable of being formed separately from said light emitting portion.
A method of manufacturing a light emitting device having a light emitting portion for supplying light, the method comprising:
- providing the light emitting portion on a reference plane;
- forming an optical portion having a refractive index, the refractive index periodically changing in a two-dimensional direction;
- and
- layering said optical portion, on said light emitting portion provided on the reference plane, approximately parallel to said two-dimensional direction.
Dependencies are inferred from the claim text.