US 11,930,570 B2
Illumination device for adjusting color temperature based on brightness and time of day
Nav Sooch, Austin, TX (US); Horace C. Ho, Austin, TX (US); Rebecca Frank, Austin, TX (US); Jason E. Lewis, Driftwood, TX (US); and Ryan Matthew Bocock, Austin, TX (US)
Assigned to Lutron Technology Company LLC, Coopersburg, PA (US)
Filed by Lutron Technology Company LLC, Coopersburg, PA (US)
Filed on Dec. 10, 2021, as Appl. No. 17/548,137.
Application 15/639,633 is a division of application No. 15/264,863, filed on Sep. 14, 2016, granted, now 9,795,000, issued on Oct. 17, 2017.
Application 17/548,137 is a continuation of application No. 16/356,896, filed on Mar. 18, 2019, granted, now 11,202,352.
Application 16/356,896 is a continuation of application No. 15/639,633, filed on Jun. 30, 2017, granted, now 10,405,397, issued on Sep. 3, 2019.
Application 15/639,633 is a continuation of application No. 15/264,775, filed on Sep. 14, 2016, granted, now 10,237,945, issued on Mar. 19, 2019.
Application 15/264,775 is a continuation of application No. 15/264,815, filed on Sep. 14, 2016, granted, now 10,582,596, issued on Mar. 3, 2020.
Prior Publication US 2022/0104321 A1, Mar. 31, 2022
Int. Cl. H05B 45/20 (2020.01); H05B 47/11 (2020.01); H05B 47/16 (2020.01); H05B 47/19 (2020.01)
CPC H05B 45/20 (2020.01) [H05B 47/16 (2020.01); H05B 47/19 (2020.01)] 21 Claims
OG exemplary drawing
 
1. A light-emitting diode (LED) lighting controller operatively couplable to one or more LED chains, the LED lighting controller comprising:
communications interface circuitry; and
controller circuitry to, responsive to receipt of an input signal that includes data representative of a requested change in brightness of the one or more operatively couplable LED chains via the communications interface circuitry:
determine a current time of day;
determine a current color temperature that corresponds to the current time of day for the one or more operatively couplable LED chains using a first color temperature curve that includes data representative of a first color temperature as a function of a time of day; and
determine a target color temperature that corresponds to the current time of day for the one or more operatively couplable LED chains using a second color temperature curve based on the requested change in brightness of the one or more operatively couplable LED chains;
wherein the second color temperature curve to include at least the target color temperature that corresponds to the determined current time of day; and
wherein a first difference between the first color temperature curve and the second color temperature curve at solar noon is less than a second difference between the first color temperature curve and the second color temperature curve at sunrise and sunset.