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US 10,593,854 B1Granted
Transparent light emitting device with light emitting diodes
AssigneeThe Regents of the University of California
InventorsShuji Nakamura, Steven P. DenBaars, Hirokuni Asamizu
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Abstract
A transparent light emitting diode (LED) includes a plurality of III-nitride layers, including an active region that emits light, wherein all of the layers except for the active region are transparent for an emission wavelength of the light, such that the light is extracted effectively through all of the layers and in multiple directions through the layers. Moreover, the surface of one or more of the III-nitride layers may be roughened, textured, patterned or shaped to enhance light extraction.
Claims6
A light emitting device, comprising:
- a transparent surface, a cathode on a first end of the transparent surface and an anode on a second end of the transparent surface, wherein the cathode and anode provide structural support to the transparent surface and are adapted to provide an electrical connection between the light emitting device and a structure outside the light emitting device;
- at least one III-nitride light emitting diode (LED) comprising a sapphire growth substrate, the LED in mechanical communication with the transparent surface, and the LED and transparent surface configured to extract light emitted by the LED through the transparent surface;
- and
- a molding comprising a phosphor and surrounding the LED, the molding configured to extract light from both a front side of the light emitting device and a back side of the light emitting device.
1 more element
Dependencies are inferred from the claim text.