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Title: LED lamp or bulb with remote phosphor and diffuser configuration with enhanced scattering properties

Abstract

An LED lamp or bulb is disclosed that comprises a light source, a heat sink structure and an optical cavity. The optical cavity comprises a phosphor carrier having a conversions material and arranged over an opening to the cavity. The phosphor carrier comprises a thermally conductive transparent material and is thermally coupled to the heat sink structure. An LED based light source is mounted in the optical cavity remote to the phosphor carrier with light from the light source passing through the phosphor carrier. A diffuser dome is included that is mounted over the optical cavity, with light from the optical cavity passing through the diffuser dome. The properties of the diffuser, such as geometry, scattering properties of the scattering layer, surface roughness or smoothness, and spatial distribution of the scattering layer properties may be used to control various lamp properties such as color uniformity and light intensity distribution as a function of viewing angle.

Inventors:
; ; ; ; ; ; ; ;
Issue Date:
Research Org.:
Cree, Inc., Durham, NC (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1163756
Patent Number(s):
8,882,284
Application Number:
13/018,291
Assignee:
Cree, Inc. (Durham, NC) NETL
DOE Contract Number:  
FC26-08NT01577
Resource Type:
Patent
Resource Relation:
Patent File Date: 2011 Jan 31
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING

Citation Formats

Tong, Tao, Le Toquin, Ronan, Keller, Bernd, Tarsa, Eric, Youmans, Mark, Lowes, Theodore, Medendorp, Jr., Nicholas W, Van De Ven, Antony, and Negley, Gerald. LED lamp or bulb with remote phosphor and diffuser configuration with enhanced scattering properties. United States: N. p., 2014. Web.
Tong, Tao, Le Toquin, Ronan, Keller, Bernd, Tarsa, Eric, Youmans, Mark, Lowes, Theodore, Medendorp, Jr., Nicholas W, Van De Ven, Antony, & Negley, Gerald. LED lamp or bulb with remote phosphor and diffuser configuration with enhanced scattering properties. United States.
Tong, Tao, Le Toquin, Ronan, Keller, Bernd, Tarsa, Eric, Youmans, Mark, Lowes, Theodore, Medendorp, Jr., Nicholas W, Van De Ven, Antony, and Negley, Gerald. Tue . "LED lamp or bulb with remote phosphor and diffuser configuration with enhanced scattering properties". United States. https://www.osti.gov/servlets/purl/1163756.
@article{osti_1163756,
title = {LED lamp or bulb with remote phosphor and diffuser configuration with enhanced scattering properties},
author = {Tong, Tao and Le Toquin, Ronan and Keller, Bernd and Tarsa, Eric and Youmans, Mark and Lowes, Theodore and Medendorp, Jr., Nicholas W and Van De Ven, Antony and Negley, Gerald},
abstractNote = {An LED lamp or bulb is disclosed that comprises a light source, a heat sink structure and an optical cavity. The optical cavity comprises a phosphor carrier having a conversions material and arranged over an opening to the cavity. The phosphor carrier comprises a thermally conductive transparent material and is thermally coupled to the heat sink structure. An LED based light source is mounted in the optical cavity remote to the phosphor carrier with light from the light source passing through the phosphor carrier. A diffuser dome is included that is mounted over the optical cavity, with light from the optical cavity passing through the diffuser dome. The properties of the diffuser, such as geometry, scattering properties of the scattering layer, surface roughness or smoothness, and spatial distribution of the scattering layer properties may be used to control various lamp properties such as color uniformity and light intensity distribution as a function of viewing angle.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2014},
month = {11}
}

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