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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 12442511 B1

PDFFull Text
Date of Patent:
Oct. 14, 2025

Filed:

Nov. 12, 2021

Color control in light fixture with subtractive color mixing system and additional filter

Applicant:

Harman Professional Denmark Aps, Aarhus, DK;

Inventors:

Frank Kjaer Jensen, Skødstrup, DK;

Kasper Nielsen, Brabrand, DK;

Assignee:

Harman Professional Denmark Aps, Aarhus N, DK;

Attorney:

Artegis Law Group, LLP

Primary Examiner:

Colin J Cattanach

Int. Cl.
CPC ...
F21V 9/40 (2018.01); F21S 10/00 (2006.01); F21S 10/02 (2006.01); F21V 9/00 (2018.01); F21V 9/08 (2018.01); F21V 9/20 (2018.01); F21V 13/08 (2006.01); F21V 13/14 (2006.01); F21V 14/00 (2018.01); F21V 14/08 (2006.01); F21V 23/04 (2006.01); F21W 131/406 (2006.01); G01J 3/50 (2006.01); H05B 31/00 (2006.01); H05B 45/20 (2020.01); H05B 45/22 (2020.01); H05B 47/105 (2020.01); H05B 47/17 (2020.01);
U.S. Cl.
CPC ...
F21V 9/40 (2018.02); F21V 14/006 (2013.01); F21V 23/0457 (2013.01); F21S 10/007 (2013.01); F21S 10/02 (2013.01); F21S 10/026 (2013.01); F21V 9/00 (2013.01); F21V 9/08 (2013.01); F21V 9/083 (2013.01); F21V 9/20 (2018.02); F21V 13/08 (2013.01); F21V 13/14 (2013.01); F21V 14/00 (2013.01); F21V 14/08 (2013.01); F21V 14/085 (2013.01); F21W 2131/406 (2013.01); G01J 3/505 (2013.01); H05B 31/0036 (2013.01); H05B 45/20 (2020.01); H05B 45/22 (2020.01); H05B 47/105 (2020.01); H05B 47/17 (2020.01);
Abstract

A method for controlling a subtractive color mixing system in a light fixture, comprising a light source, the subtractive color mixing system comprising a plurality of subtractive color filters, and an additional filter. The method is for emitting light having a target color upon having traversed the additional filter, such as upon having traversed the subtractive color mixing system and the additional filter and optionally being emitted from the light fixture. The method comprising receiving target information indicative of, such as defining, the target color, calculating a target control setpoint for each subtractive color filter within the plurality of subtractive color filters based on the target information, and calibration data, which for a plurality of sets of calibration control setpoints is indicative of an emitted color, controlling each of the subtractive color filters according to each calculated target control setpoint for each of the subtractive color filters.

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