US RE49,637 E1
Systems and methods for high output, high color quality light
Brian Kinnune, Racine, WI (US); David Goelz, Milwaukee, WI (US); Don Miletich, Franklin, WI (US); Alan Ruud, Racine, WI (US); Kurt Wilcox, Libertyville, IL (US); Yuequan Hu, Morrisville, NC (US); Liqin Ni, Cary, NC (US); Nicholas William Medendorp, Jr., Raleigh, NC (US); and Boris Karpichev, Libertyville, IL (US)
Assigned to IDEAL Industries Lighting LLC, Sycamore, IL (US)
Filed by IDEAL INDUSTRIES LIGHTING LLC, Durham, NC (US)
Filed on Aug. 6, 2020, as Appl. No. 16/986,968.
Application 15/421,999 is a continuation of application No. 14/188,184, filed on Feb. 24, 2014, granted, now 9,593,837, issued on Mar. 14, 2017.
Application 14/188,184 is a continuation in part of application No. 14/083,070, filed on Nov. 18, 2013, granted, now 10,743,384, issued on Aug. 11, 2020.
Application 14/083,070 is a continuation in part of application No. 13/839,922, filed on Mar. 15, 2013, granted, now 9,441,824, issued on Sep. 13, 2016.
Application 13/839,922 is a continuation in part of application No. 13/333,198, filed on Dec. 21, 2011, granted, now 8,313,222, issued on Nov. 20, 2012.
Application 13/333,198 is a continuation of application No. 12/418,364, filed on Apr. 3, 2009, granted, now 8,092,049, issued on Jan. 10, 2012.
Application 14/188,184 is a continuation in part of application No. 13/787,579, filed on Mar. 6, 2013, granted, now 9,182,096, issued on Nov. 10, 2015.
Application 16/986,968 is a reissue of application No. 15/421,999, filed on Feb. 1, 2017, granted, now 10,045,418, issued on Aug. 7, 2018.
Claims priority of provisional application 61/042,690, filed on Apr. 4, 2008.
Int. Cl. H05B 33/00 (2006.01); H05B 33/08 (2020.01); H05B 45/3725 (2020.01); F21V 29/74 (2015.01); F21V 29/83 (2015.01); H05B 45/46 (2020.01); H05B 45/24 (2020.01); F21K 9/00 (2016.01); F21S 8/08 (2006.01); F21V 23/00 (2015.01); F21Y 113/13 (2016.01); F21Y 103/10 (2016.01); F21Y 115/10 (2016.01); H05B 45/38 (2020.01); H05B 45/375 (2020.01); F21W 131/103 (2006.01)
CPC H05B 45/3725 (2020.01) [F21K 9/00 (2013.01); F21S 8/086 (2013.01); F21V 23/007 (2013.01); F21V 29/74 (2015.01); F21V 29/83 (2015.01); H05B 45/24 (2020.01); H05B 45/46 (2020.01); F21W 2131/103 (2013.01); F21Y 2103/10 (2016.08); F21Y 2113/13 (2016.08); F21Y 2115/10 (2016.08); H05B 45/375 (2020.01); H05B 45/38 (2020.01)] 67 Claims
OG exemplary drawing
 
1. A light fixture comprising:
a plurality of LEDs configured to output a cumulative light output [ , the plurality of LEDs comprising two or more strings of LEDs, at least two of the two or more strings of LEDs comprising different color LEDs, the two or more strings of LEDs comprising a first string of LEDs and a second string of LEDs connected in parallel with the first string of LEDs] ;
a [ first ] current control device [ connected in series with the first string of LEDs and ] configured to control a drive current provided to the plurality of LEDs, wherein the drive current comprises at least 700 mA; and
[ a second current control device connected in series with the second string of LEDs and configured to control the drive current provided to the plurality of LEDs;
a first voltage measurement device coupled to the first string of LEDs and the second string of LEDs, the first voltage measurement device coupled to the first current control device and configured to control the first current control device; and
a second voltage measurement device coupled to the first string of LEDs and the second string of LEDs, the second voltage measurement device coupled to the second current control device and configured to control the second current control device;]
wherein the cumulative light output comprises an intensity of greater than or equal to 10,000 lumens and a color temperature of greater than or equal to 4000° K [ color rendering index (CRI) of at least 94] .