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US 2013/0154486 A1Published application
Selective light sensor and daylight management
AssigneeRedwood Systems, Inc.
InventorJonathan M. Barrilleaux
Life of this patent
Estimating the term…
Abstract
A system and method for daylight harvesting and/or light management is provided in which a signal from a light sensor is filtered in order to determine the amount of light received from a light fixture in a lighting system and/or from an external light source, such as sunlight even if light is received from multiple light sources. By filtering the signals from the light sensor, an amount of light received from each light source may be determined, and correspondingly controlled to reach a target light level and/or a target balance of light from the multiple light sources.
Claims15
An apparatus for light management comprising:
- a filter configured to receive a sensor signal that indicates an amount of light in a lighting area detected by a sensor, wherein the filter is further configured to generate a filtered signal from the sensor signal such that the filter blocks any component of the sensor signal representing light from a light fixture and passes any component of the sensor signal representing sunlight, the filtered signal indicating an amount of sunlight in the lighting area;
- and
- an adapter circuit configured to transmit an indication of the amount of sunlight in the lighting area to a light management module, wherein the light management module is configured to determine a target amount of light to be received from the light fixture in the lighting area based on a target light level for the lighting area and on the amount of light in the lighting area received from sunlight, wherein the light management module is further configured to cause the adapter circuit to receive a power signal having a target power level at which the light fixture generates the target amount of light, and the adapter circuit is coupled to the light fixture such that the light fixture receives the power signal having the target power level.
A system for light management comprising:
- a sensor configured to generate a sensor signal that indicates an amount of light detected in a lighting area by the sensor;
- a filter configured to generate a filtered signal from the sensor signal such that the filter blocks any component of the sensor signal representing light from a first light source and passes any component of the sensor signal representing light from a second light source, the first light source including a light fixture that illuminates the lighting area, the filtered signal indicating an amount of light in the lighting area received from the second light source;
- and
- a light management module configured to determine a target amount of light to be received from the first light source in the lighting area based on a target light level for the lighting area and on the amount of light in the lighting area received from the second light source,
- wherein the light management module is further configured to cause the light fixture to be powered at a target power level at which the light fixture generates the target amount of light.
2 more elements
A method for light management comprising:
- receiving a sensor signal that indicates an amount of light detected in a lighting area by a sensor;
- generating a filtered signal from the sensor signal by blocking any component of the sensor signal representing light from a first light source and passing any component of the sensor signal representing light from a second light source, the first light source including a light fixture that illuminates the lighting area, the filtered signal indicating an amount of light in the lighting area received from the second light source;
- determining a target amount of light to be received from the first light source in the lighting area based on a target light level for the lighting area and on the amount of light in the lighting area received from the second light source;
- and
- causing the light fixture to be powered at a target power level at which the light fixture generates the target amount of light.
2 more elements
Dependencies are inferred from the claim text.