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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US RE50562 B1

PDFFull Text
Date of Patent:
Aug. 26, 2025

Filed:

Dec. 22, 2021

Linear led illumination device with improved color mixing

Applicant:

Lutron Technology Company Llc, Coopersburg, PA (US);

Inventors:

Fangxu Dong, Austin, TX (US);

Craig T. Phillips, San Marcos, TX (US);

Derek Edward Logan, Austin, TX (US);

Tomas J. Mollnow, Austin, TX (US);

Assignee:

Lutron Technology Company LLC, Coopersburg, PA (US);

Attorney:

Condo Roccia Koptiw LLP

Primary Examiner:

Angela M Lie

Int. Cl.
CPC ...
F21V 7/00 (2006.01); F21K 9/62 (2016.01); F21K 99/00 (2016.01); F21V 7/04 (2006.01); F21V 7/06 (2006.01); F21V 13/04 (2006.01); F21V 21/30 (2006.01); H05B 33/08 (2020.01); H05B 45/00 (2022.01); H05B 45/10 (2020.01); H05B 45/20 (2020.01); H05B 45/22 (2020.01); F21Y 103/00 (2016.01); F21Y 103/10 (2016.01); F21Y 105/10 (2016.01); F21Y 105/12 (2016.01); F21Y 113/17 (2016.01); F21Y 115/10 (2016.01); H05B 45/18 (2020.01); H05B 45/28 (2020.01);
U.S. Cl.
CPC ...
H05B 45/10 (2020.01); F21K 9/62 (2016.08); F21V 7/0083 (2013.01); F21V 7/048 (2013.01); F21V 7/06 (2013.01); F21V 13/04 (2013.01); F21V 21/30 (2013.01); H05B 45/00 (2020.01); H05B 45/20 (2020.01); H05B 45/22 (2020.01); F21Y 2103/00 (2013.01); F21Y 2103/10 (2016.08); F21Y 2105/10 (2016.08); F21Y 2105/12 (2016.08); F21Y 2113/17 (2016.08); F21Y 2115/10 (2016.08); H05B 45/18 (2020.01); H05B 45/28 (2020.01);
Abstract

A linear multi-color LED illumination device that produces uniform color throughout the output light beam without the use of excessively large optics or optical losses is disclosed herein. Embodiments for improving color mixing in the linear illumination device include, but are not limited to, a shallow dome encapsulating a plurality of emission LEDs within an emitter module, a unique arrangement of a plurality of such emitter modules in a linear light form factor, and special reflectors designed to improve color mixing between the plurality of emitter modules. In addition to improved color mixing, the illumination device includes a light detector and optical feedback for maintaining precise and uniform color over time and/or with changes in temperature. The light detector is encapsulated within the shallow dome along with the emission LEDs and is positioned to capture the greatest amount of light reflected by the dome from the LED having the shortest emission wavelength.

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