Light emitting device
First Claim
Patent Images
1. A light emitting device having a multi-layer structure, comprising:
- a reflector layer having the maximum reflectivity at an incidence angle more than zero degrees and less than an angle θ
,wherein the angle θ
is represented by the equation θ
=Sin−
1[n2/n1] (where, n1 is the maximum refractive index of the multi-layers constituting the light emitting device, and n2 is the refractive index of an external background material).
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Abstract
A light emitting device is closed. More particularly, a light emitting device capable improving light-extraction efficiency is disclosed. The light emitting device includes a plurality of layers including a reflector layer. The reflector layer has the maximum reflectivity at an incidence angle more than zero degrees and less than an angle θ. The angle θ is represented by the equation θ=Sin−1[n2/n1] (where, n1 is the maximum refractive index of the plurality of layers constituting the light emitting device, and n2 is the refractive index of an external background material).
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20 Claims
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1. A light emitting device having a multi-layer structure, comprising:
-
a reflector layer having the maximum reflectivity at an incidence angle more than zero degrees and less than an angle θ
,wherein the angle θ
is represented by the equation θ
=Sin−
1[n2/n1] (where, n1 is the maximum refractive index of the multi-layers constituting the light emitting device, and n2 is the refractive index of an external background material). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A light emitting device comprising:
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a reflector layer including a first semiconductor layer and a second semiconductor layer stacked one above another alternately, the first and second semiconductor layers having different refractive indices from each other; and a third semiconductor layer disposed on the reflector layer and having a thickness thicker than a thickness of the first semiconductor layer or the second semiconductor layer. - View Dependent Claims (16, 17, 18, 19)
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20. A light emitting device comprising:
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a reflector layer; and a light emitting layer disposed on the reflector layer, wherein the reflector layer has the maximum reflectivity when light emitted from the light emitting layer is incident on the reflector layer by an angle more than zero degrees and less than 25 degrees.
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Specification