US 11,991,801 B2
Lifetime color stabilization of color-shifting artificial light sources
Eric Bretschneider, Corinth, TX (US); Louis Lerman, Las Vegas, NV (US); and Hans Peter Stormberg, Stolberg (DE)
Assigned to Quarkstar LLC, Las Vegas, NV (US)
Filed by Quarkstar LLC, Las Vegas, NV (US)
Filed on May 11, 2022, as Appl. No. 17/742,324.
Application 17/742,324 is a continuation of application No. 16/488,463, granted, now 11,337,282, previously published as PCT/US2018/020292, filed on Feb. 28, 2018.
Claims priority of provisional application 62/629,684, filed on Feb. 12, 2018.
Claims priority of provisional application 62/465,116, filed on Feb. 28, 2017.
Prior Publication US 2023/0109630 A1, Apr. 6, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H05B 45/22 (2020.01); H01L 33/50 (2010.01); H05B 45/24 (2020.01); H05B 45/28 (2020.01)
CPC H05B 45/22 (2020.01) [H01L 33/502 (2013.01); H05B 45/24 (2020.01); H05B 45/28 (2020.01); H01L 2933/0041 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A light emitting device manufactured using a method, comprising:
selecting, from among a first plurality of light emitting diodes (LEDs), a first LED configured to output first light having a first color shift at a specific number of operating hours; and
selecting, from among a second plurality of LEDs, a second LED configured to output second light having a second color shift at said number of operating hours, the second color shift being different from the first color shift; and
assembling the light emitting device based on the first and second color shifts so the light emitting device includes the first LED and the second LED and a combined color shift at said number of operating hours that is less than the smaller of the first and second color shifts,
wherein the specific number of operating hours is 1,000 or more.