US 12,219,675 B2
Melanopic light system with high CRI using cyan direct emitters
Martinus Petrus Joseph Peeters, Weert (NL); and René Theodorus Wegh, Veldhoven (NL)
Assigned to SIGNIFY HOLDING B.V., Eindhoven (NL)
Appl. No. 17/925,051
Filed by SIGNIFY HOLDING B.V., Eindhoven (NL)
PCT Filed May 6, 2021, PCT No. PCT/EP2021/061958
§ 371(c)(1), (2) Date Nov. 14, 2022,
PCT Pub. No. WO2021/228671, PCT Pub. Date Nov. 18, 2021.
Claims priority of application No. 20174976 (EP), filed on May 15, 2020.
Prior Publication US 2023/0189411 A1, Jun. 15, 2023
Int. Cl. H05B 45/20 (2020.01); A61N 5/06 (2006.01); H05B 47/155 (2020.01)
CPC H05B 45/20 (2020.01) [A61N 5/0622 (2013.01); H05B 47/155 (2020.01); A61N 2005/0651 (2013.01); A61N 2005/0663 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A tunable light generating system comprising one or more first light generating devices, one or more second light generating devices, and one or more third light generating devices, wherein:
the one or more first light generating devices are configured to generate white first device light having a first color rendering index (CRI1) and a first correlated color temperature (Tc1);
the one or more second light generating devices are configured to generate white second device light having a second color rendering index (CRI2) and a second correlated color temperature (Tc2);
the one or more third light generating devices are configured to generate third device light having a third dominant wavelength (λd3) selected from the range of 470-500 nm;
CRI1−CRI2≥10; CRI1≥85; Tc2−Tc1≥1000 K; Tc1≤3500 K; and Tc2≥3000 K; and
the tunable light generating system is configured to generate system light comprising one or more of the white first device light, the white second device light, and the third device light,
the tunable light generating system further comprising (i) a first LED string comprising the one or more first light generating devices, and (ii) a second LED string comprising the one or more second light generating devices and the one or more third light generating devices, and
the tunable light generating system being configured to control the ratio of the first LED string and the second LED string.