Solid-state circadian rhythm lamp and related control techniques
First Claim
1. A solid-state lamp comprising:
- a printed circuit board (PCB);
a first plurality of solid-state emitters populated over the PCB and configured to emit light having a first correlated color temperature (CCT);
a second plurality of solid-state emitters populated over the PCB and configured to emit light having a second CCT that differs from the first CCT; and
a controller configured to;
electronically control, via a control signal, emissions of the first plurality of solid-state emitters and the second plurality of solid-state emitters such that;
in a first emissions mode, the first plurality of solid-state emitters emits light, wherein a spectral power ratio of the light emitted at a wavelength in the range of about 400-495 nm to a remainder of the light emitted by the first plurality of solid-state emitters in the first emissions mode is such that the light emitted at the wavelength in the range of about 400-495 nm constitutes about 10% or less of a total light emitted by the first plurality of solid-state emitters; and
in a second emissions mode, the second plurality of solid-state emitters emits light, wherein a spectral power ratio of the light emitted at a wavelength in the range of about 400-495 nm to a remainder of the light emitted by the second plurality of solid-state emitters in the second emissions mode is such that the light emitted at the wavelength in the range of about 400-495 nm constitutes about 30% or more of a total light emitted by the second plurality of solid-state emitters; and
provide for changing between the first emissions mode and the second emissions mode based on hysteresis of a lighting switch associated with a power socket with which the solid-state lamp is configured to be operatively coupled.
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Accused Products
Abstract
A solid-state circadian rhythm lamp and related control techniques are disclosed. The lamp may have a night/pre-sleep emissions mode in which it emits light having a correlated color temperature (CCT) of about 1,800-2,300 K, the spectral power ratio of blue light (400-495 nm) being such that it constitutes about 10% or less of the total light emitted. The lamp may have a day/wakeup emissions mode in which it emits light having a CCT of about 5,000-8,000 K, the spectral power ratio of blue light being such that it constitutes about 30% or more of the total light emitted. The lamp may have a general lighting mode in which it produces a combined light output having a CCT of about 2,500-5,000 K. The lamp driver may support emissions mode changing based on hysteresis relating to a lighting switch associated with a power socket hosting the lamp.
14 Citations
20 Claims
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1. A solid-state lamp comprising:
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a printed circuit board (PCB); a first plurality of solid-state emitters populated over the PCB and configured to emit light having a first correlated color temperature (CCT); a second plurality of solid-state emitters populated over the PCB and configured to emit light having a second CCT that differs from the first CCT; and a controller configured to; electronically control, via a control signal, emissions of the first plurality of solid-state emitters and the second plurality of solid-state emitters such that; in a first emissions mode, the first plurality of solid-state emitters emits light, wherein a spectral power ratio of the light emitted at a wavelength in the range of about 400-495 nm to a remainder of the light emitted by the first plurality of solid-state emitters in the first emissions mode is such that the light emitted at the wavelength in the range of about 400-495 nm constitutes about 10% or less of a total light emitted by the first plurality of solid-state emitters; and in a second emissions mode, the second plurality of solid-state emitters emits light, wherein a spectral power ratio of the light emitted at a wavelength in the range of about 400-495 nm to a remainder of the light emitted by the second plurality of solid-state emitters in the second emissions mode is such that the light emitted at the wavelength in the range of about 400-495 nm constitutes about 30% or more of a total light emitted by the second plurality of solid-state emitters; and provide for changing between the first emissions mode and the second emissions mode based on hysteresis of a lighting switch associated with a power socket with which the solid-state lamp is configured to be operatively coupled. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A solid-state lamp comprising:
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a light source module comprising; a first plurality of solid-state emitters configured to emit light having a first correlated color temperature (CCT) in the range of about 1,800-2,300 K; and a second plurality of solid-state emitters configured to emit light having a second CCT in the range of about 5,000-8,000 K; and a driver configured to; drive the first plurality of solid-state emitters and the second plurality of solid-state emitters such that; in a first emissions mode, the first plurality of solid-state emitters emits light, wherein a spectral power ratio of the light emitted at a wavelength in the range of about 400-495 nm to a remainder of the light emitted by the first plurality of solid-state emitters in the first emissions mode is such that the light emitted at the wavelength in the range of about 400-495 nm constitutes about 10% or less of a total light emitted by the first plurality of solid-state emitters; and in a second emissions mode, the second plurality of solid-state emitters emits light, wherein a spectral power ratio of the light emitted at a wavelength in the range of about 400-495 nm to a remainder of the light emitted by the second plurality of solid-state emitters in the second emissions mode is such that the light emitted at the wavelength in the range of about 400-495 nm constitutes about 30% or more of a total light emitted by the second plurality of solid-state emitters; and provide for changing between the first emissions mode and the second emissions mode based on hysteresis of a lighting switch associated with a power socket with which the solid-state lamp is configured to be operatively coupled. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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19. A method of illumination via a solid-state lamp, the method comprising:
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emitting, via a first solid-state emitter of the solid-state lamp, light having a first correlated color temperature (CCT) in the range of about 1,800-2,300 K, wherein a spectral power ratio of the light emitted at a wavelength between 400-495 nm to a remainder of the light emitted by the first solid-state emitter is such that the light emitted at the wavelength between 400-495 nm constitutes about 10% or less of a total light emitted by the first solid-state emitter; and emitting, via a second solid-state emitter of the solid-state lamp, light having a second CCT in the range of about 5,000-8,000 K, wherein a spectral power ratio of the light emitted at a wavelength between 400-495 nm to a remainder of the light emitted by the second solid-state emitter is such that the light emitted at the wavelength between 400-495 nm constitutes about 30% or more of a total light emitted by the second solid-state emitter. - View Dependent Claims (20)
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Specification