Patent US10349484 Consumer Sleep Technology

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Patent US10349484

Issued 2019-07-09

Solid State Lighting Devices With Reduced Melatonin Suppression Characteristics

Solid state lighting devices with melatonin suppression characteristics that ameliorate or reduce symptoms of circadian rhythm disorders or other health conditions. Aspects disclosed herein additionally relate to providing one or more of the foregoing effects while maintaining color rendering index (CRI) values acceptably high for the intended use, as well as providing lighting devices with high luminous efficacy and enhanced energy efficiency. A solid state lighting device includes one or more solid state emitters and one or more lumiphoric materials that provide aggregated emissions of the solid state lighting device. The aggregated emissions have a warm correlated color temperature (CCT) with a color point that is off of the blackbody locus (BBL) by a certain distance.

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4 Independent Claims

1. A solid state lighting device comprising: at least one electrically activated solid state emitter configured to generate emissions having a peak wavelength in a range of 430 nanometers (nm) to 480 nm; a first lumiphoric material arranged to receive at least a portion of the emissions of the at least one electrically activated solid state emitter and responsively generate first lumiphor emissions having a peak wavelength in a range of 540 nm to 570 nm; and a second lumiphoric material arranged to receive at least a portion of the emissions of the at least one electrically activated solid state emitter and responsively generate second lumiphor emissions having a peak wavelength in a range of 605 nm to 650 nm; wherein aggregated emissions of the solid state lighting device include at least a portion of the emissions of each of the at least one electrically activated solid state emitter, the first lumiphor emissions, and the second lumiphor emissions; and wherein the aggregated emissions have a correlated color temperature (CCT) in a range of 1800 Kelvin (K) to 2600 K, and have a Duv of at least 0.005.
13. A solid state lighting device comprising: a first electrically activated solid state emitter configured to generate emissions having a peak wavelength in a range of 430 nanometers (nm) to 480 nm; a first lumiphoric material arranged to receive at least a portion of emissions of the first electrically activated solid state emitter and responsively generate first lumiphor emissions; a second electrically activated solid state emitter; and a second lumiphoric material arranged to receive at least a portion of emissions of the second electrically activated solid state emitter and responsively generate second lumiphor emissions, wherein the second lumiphor emissions have a peak wavelength that differs from a peak wavelength of the first lumiphor emissions by at least 25 nm; wherein aggregated emissions of the solid state lighting device include at least a portion of the emissions of each of the first electrically activated solid state emitter, the second electrically activated solid state emitter, the first lumiphor emissions, and the second lumiphor emissions; and wherein the aggregated emissions have a correlated color temperature (CCT) in a range of 1800 Kelvin (K) to 2600 K, and have a Duv of at least 0.005.
18. A solid state lighting device comprising: a first electrically activated solid state emitter configured to generate emissions having a peak wavelength in a range of 430 nanometers (nm) to 480 nm; a first lumiphoric material arranged to receive at least a portion of the emissions of the first electrically activated solid state emitter and responsively generate first lumiphor emissions having a peak wavelength in a range of 540 nm to 570 nm; and a second electrically activated solid state emitter configured to generate emissions having a peak wavelength in a range of 605 nm to 650 nm; wherein aggregated emissions of the solid state lighting device include at least a portion of the emissions of each of the first electrically activated solid state emitter, the first lumiphor emissions, and the second electrically activated solid state emitter; and wherein the aggregated emissions have a correlated color temperature (CCT) in a range of 1800 Kelvin (K) to 2600 K, and have a Duv of at least 0.005.
22. A solid state lighting device comprising: a first electrically activated solid state emitter; a first lumiphoric material arranged to receive at least a portion of emissions of the first electrically activated solid state emitter and responsively generate first lumiphor emissions; and at least one other light emitter including at least one of the following items (a) or (b): (a) a second electrically activated solid state emitter, or (b) a second lumiphoric material arranged to receive at least a portion of emissions of the first electrically activated solid state emitter and responsively generate second lumiphor emissions; wherein aggregated emissions of the solid state lighting device include at least a portion of the emissions of each of the first electrically activated solid state emitter, the first lumiphoric material, and the at least one other light emitter; and wherein the aggregated emissions have a circadian stimulus (CS) value of less than 0.17, and have a Duv of at least 0.005.