Light Emitting Device, Light Emitting Device Package
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[0028]A light emitting device 100 according to a first embodiment may include a light emitting structure 120 including a first conductive type semiconductor layer 122, an active layer 124, and a second conductive type semiconductor layer 126 and a light extraction pattern P in which a period (a) exceeds λ / n (where, λ is a wavelength of light emitted from the active layer 124, and n is a refractive index of the light emitting structure 120) on the light emitting structure 120.
[0029]Although the light extraction pattern P is disposed within the light emitting structure 120 in the current embodiment, the present disclosure is not limited thereto. For example, an undoped semiconductor layer 110 may be disposed on the light emitting structure 120, and the light extraction pattern P may be disposed on the undoped semiconductor layer 110. Alternatively, the light extraction pattern P may be disposed on the first conductive type semiconductor layer 122.
[0030]In the current embodiment, the l...
Example
[0080]A second embodiment may adopt the technical features of the first embodiment.
[0081]As shown in FIG. 6, a second electrode layer 130 may be disposed under a light emitting structure 120. A second light extraction pattern P2 may be disposed in the second electrode layer 130. The second light extraction pattern P2 may be a light extraction pattern (where, λ is a wavelength of light emitted from an active layer, and n is a refractive index of a light emitting structure) in which a period (a) exceeds λ / n within the second electrode layer 130. The second light extraction pattern P2 may be disposed within the second electrode layer 130 and contact the light emitting structure 120. Also, the second light extraction pattern P2 may not be exposed to the outside of the second electrode layer 130.
[0082]Also, as shown in FIG. 6, the second embodiment may include a wavelength filter 140 on the light emitting structure 120.
[0083]Also, in the second embodiment, an undoped semiconductor layer ...
Example
[0095]A third embodiment may adopt the technical features of the second embodiment.
[0096]The light emitting device 103 according to the third embodiment may include a light emitting structure 120 including a first conductive type semiconductor layer 212, an active layer 214, and a second conductive type semiconductor layer 216, a first dielectric layer 151 on a portion of a top surface of the light emitting structure 120, and a pad electrode 162 on the first dielectric layer 151.
[0097]In the current embodiment, a dielectric layer 150 may include the first dielectric layer 151 and a second dielectric layer 152 on a side surface of the light emitting structure. The first dielectric layer 151 and the second dielectric layer 152 may be connected to each other.
[0098]The current embodiment may include a first electrode 161 on the light emitting structure 120. The pad electrode 162 may be electrically connected to the first electrode 161.
[0099]A light extraction pattern P in which a period...
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