US 2020/0368550 A1 · LIGHTING SYSTEM FOR PROTECTING CIRCADIAN NEUROENDOCRINE FUNCTION

Abstract

Lighting systems, methods, and devices for protecting human circadian neuroendocrine function during night use are described. Suitable lighting conditions can be provided for a working environment while protecting the circadian neuroendocrine systems of those occupying the illuminated workplace during the night. Lighting systems, methods, and devices can provide substantive attenuation of the pathologic circadian disruption in night workers. Lighting systems, methods, and devices can attenuate the specific bands of light implicated in circadian disruption. LED lighting systems, methods, and devices can provide increased intensity at a different portion of the spectrum than conventional LEDs, providing a useable white light even when unfavorable portions of the wavelength are attenuated by a notch filter. LED lighting systems, methods, and devices can switch between a daytime configuration and a night time configuration, wherein the daytime configuration provides unfiltered light and the night time configuration provides filtered light.

Claims20

Dependent claims

A device, comprising:

a display configured to emit light during operation of the device;
and
a device controller programmed to vary a spectral intensity profile of white light emitted by the display according to a circadian cycle, wherein the device controller:
causes the display to emit, during a first period of the circadian cycle, white light having a first spectral intensity profile in a wavelength range from 400 nm to 700 nm, the wavelength range comprising a first component wavelength range from 400 nm to 430 nm, a second component wavelength range from 430 nm to 500 nm, and a third component wavelength range from 500 nm to 700 nm;
and
causes the display to emit, during a second period of the circadian cycle, white light having a second spectral intensity profile in the wavelength range from 400 nm to 700 nm different from the first spectral intensity profile,
wherein greater than four percent (4%) of the total irradiance in the second spectral intensity profile is in the first component wavelength band, and
wherein less than six percent (6%) of the total irradiance in the second spectral intensity profile is in the second component wavelength band.

5 more elements

A device, comprising:

at least one violet light emitting diode (LED);
at least one blue LED;
at least one green LED;
at least one red LED;
a device controller programmed to control light emission from the at least one violet LED, at least one blue LED, green LED, and at least one red LED to vary a spectral intensity profile of white light emitted by the device according to a circadian cycle, wherein the device controller:
causes the device to emit, during a first period of the circadian cycle, white light having a first spectral intensity profile in a wavelength range from 400 nm to 700 nm, the wavelength range comprising a first component wavelength range from 400 nm to 430 nm, a second component wavelength range from 430 nm to 500 nm, and a third component wavelength range from 500 nm to 700 nm;
and
causes the device to emit, during a second period of the circadian cycle, white light having a second spectral intensity profile in the wavelength range from 400 nm to 700 nm different from the first spectral intensity profile,
wherein during the second period of the circadian cycle emission from the at least one violet LED is increased relative to emission from the at least one blue LED compared to emission from the at least one violet LED and at least one blue LED during the first circadian cycle so that more than four percent (4%) of the total irradiance in the second spectral intensity profile is in a first component wavelength band from 400 nm to 430 nm, and less than six percent (6%) of the total irradiance in the second spectral intensity profile is in a second component wavelength band from 430 nm to 500 nm.

6 more elements

A method, comprising:

varying a spectral intensity profile of white light emitted by a display according to a circadian cycle, wherein the varying comprises:
emitting from the display, during a first period of the circadian cycle, white light having a first spectral intensity profile in a wavelength range from 400 nm to 700 nm, the wavelength range comprising a first component wavelength range from 400 nm to 430 nm, a second component wavelength range from 430 nm to 500 nm, and a third component wavelength range from 500 nm to 700 nm;
and
emitting from the display, during a second period of the circadian cycle, white light having a second spectral intensity profile in the wavelength range from 400 nm to 700 nm different from the first spectral intensity profile,
wherein greater than four percent (4%) of the total irradiance in the second spectral intensity profile is in the first component wavelength band, and
wherein less than six percent (6%) of the total irradiance in the second spectral intensity profile is in the second component wavelength band.

3 more elements

Dependencies are inferred from the claim text.

Lighting system for protecting circadian neuroendocrine function

Life of this patent

Lighting system for protecting circadian neuroendocrine function

Life of this patent

Abstract

Claims20