LED lighting system
First Claim
1. A system to control a plurality of channels of lighting elements to generate artificial sunlight with spectral characteristics that resemble natural sunlight, the system comprising:
- a controller communicatively coupled to receive input signals, to receive signals from a number of light sensors, and to control the plurality of channels of lighting elements, the controller operable to;
sequentially individually activate each of the channels of lighting elements,receive signals from the light sensors, the respective signals representative of detected light for each of the channels of lighting elements;
automatically create a calibrated setpoint for each of the channels of lighting elements based at least in part on the respective signals generated for the respective channel of lighting elements by the light sensors;
automatically create respective drive signals for each of the channels of lighting elements based at least in part on the calibrated setpoint for the respective channel of lighting element and based at least in part on the received input signals; and
automatically provide the respective drive signals to the channels of lighting elements to automatically vary a brightness level and a color level of the respective channels of lighting elements to produce a composite light along at least a portion of a daylight locus.
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Accused Products
Abstract
A system and method involving lighting fixtures, a control network, a controller and other devices such as light sensors, input devices and network adapters for coordinating precise brightness and color schedules among the lighting fixtures while maintaining a high color reliability including provisions for managing a plurality of lighting fixtures. The lighting fixtures contain lighting elements selected such that when controlled properly, operating along a daytime locus, the resultant light output closely resembles sunlight on a cloudless day in spectral characteristics, and wherein the total flux of blue light can be adjusted from a relative level of 1-100% the maximum blue flux of the lighting fixture by controlling individual lighting elements.
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Citations
24 Claims
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1. A system to control a plurality of channels of lighting elements to generate artificial sunlight with spectral characteristics that resemble natural sunlight, the system comprising:
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a controller communicatively coupled to receive input signals, to receive signals from a number of light sensors, and to control the plurality of channels of lighting elements, the controller operable to; sequentially individually activate each of the channels of lighting elements, receive signals from the light sensors, the respective signals representative of detected light for each of the channels of lighting elements; automatically create a calibrated setpoint for each of the channels of lighting elements based at least in part on the respective signals generated for the respective channel of lighting elements by the light sensors; automatically create respective drive signals for each of the channels of lighting elements based at least in part on the calibrated setpoint for the respective channel of lighting element and based at least in part on the received input signals; and automatically provide the respective drive signals to the channels of lighting elements to automatically vary a brightness level and a color level of the respective channels of lighting elements to produce a composite light along at least a portion of a daylight locus. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A system to control a plurality of channels of lighting elements to generate artificial sunlight with spectral characteristics that resemble natural sunlight, the system comprising:
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a controller communicatively coupled to receive signals from a number of light sensors representative of at least one characteristic of a composite light emitted by the lighting elements, and communicatively coupled to control the channels of lighting elements, the controller operable to; receive a user-selected input that specifies an adjustment for a time-color profile that specifies values of one or more of brightness and color temperature versus time; activate the channels of the lighting elements to generate a composite light; activate a color match algorithm to automatically create respective drive signals for the channels of lighting elements based at least in part on the time-color profile and the respective signals representative of the composite light received from the light sensors; and automatically provide the respective drive signals to the channels of lighting elements to automatically vary a brightness level and color level of respective ones of the channels of lighting elements to produce the composite light along at least a portion of a daylight locus that corresponds to values specified by the time-color profile for a current time. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification