Active solid-state devices (e.g. – transistors – solid-state diode – Incoherent light emitter structure – Encapsulated
Reexamination Certificate
2011-08-16
2011-08-16
Sandvik, Benjamin P (Department: 2893)
Active solid-state devices (e.g., transistors, solid-state diode
Incoherent light emitter structure
Encapsulated
C257S013000, C257S079000, C257S098000, C257SE51020, C257SE51022, C257SE33001, C257SE33059, C257SE33074, C257SE25028, C257SE25032, C313S503000, C313S512000
Reexamination Certificate
active
07999283
ABSTRACT:
A light emitting device having an encapsulant with scattering features to tailor the spatial emission pattern and color temperature uniformity of the output profile. The encapsulant is formed with materials having light scattering properties. The concentration of these light scatterers is varied spatially within the encapsulant and/or on the surface of the encapsulant. The regions having a high density of scatterers are arranged in the encapsulant to interact with light entering the encapsulant over a desired range of source emission angles. By increasing the probability that light from a particular range of emission angles will experience at least one scattering event, both the intensity and color temperature profiles of the output light beam can be tuned.
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Chakraborty Arpan
Keller Bernd
Cree Inc.
Khan Farid
Koppel, Patrick, Heybl & Philpott
Sandvik Benjamin P
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