Task to wall color control
First Claim
1. A light sensor comprising:
- a photosensor;
a memory;
a communication interface; and
a controller coupled with the photosensor, the communication interface, and the memory, wherein the controller is configured to;
sample from the photosensor a first value representing an intensity of light within a first spectral range at a non-task location within an architectural space, wherein the first spectral range comprises a spectral range within the visual spectrum and does not include the entire visual spectrum;
calculate a first change in a light output within the first spectral range of a light source to produce a desired amount of light within the first spectral range at a task location based on the first value, wherein the task location and the non-task locations are different locations within the architectural space;
increase or decrease the first change in the light output within the first spectral range of the light source to ensure that the light source will produce a desired white light intensity at the task location; and
transmit via the communication interface the first change in a light output within the first spectral range to the light source;
wherein the first change in a light output within the first spectral range is calculated from the following equation;
PercentChangei=func(desiredi−
Sensori*ki−
TaskFCi+WallFCi*ki)*Gi wherein PercentChangei represents a percent change in the first spectral range output of the light source,wherein desiredi represents a desired first spectral range level at the task location,wherein Sensori represents the sampled light intensity of the first spectral range at the non-task location,wherein ki represents a non-task-to-task translation constant,wherein TaskFCi represents a fixture contribution at the task location for a given percentage of light output of the ith light source in the first spectral range,wherein WallFCi represents a fixture contribution at the non-task location for a given percentage of light output of the ith light source in the first spectral range; and
wherein Gi represents a predetermined gain.
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Accused Products
Abstract
A light sensor is disclosed that includes a photosensor; a memory; a communication interface; and a controller coupled with the photo sensor, the communication interface, and the memory. The controller may be configured to perform a number of operations. For example, the controller may be configured to sample from the photosensor a light intensity of light within a first spectral range at a non-task location within an architectural space; and determine a change in the first spectral range output of a light source to produce a desired amount of light within the first spectral range at a task location based on the sensed light intensity of the color channel at the non-task location. In some embodiments, the task location and the non-task locations are different locations within the architectural space. The controller may also be configured to transmit the change in the color channel output to a light source.
61 Citations
17 Claims
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1. A light sensor comprising:
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a photosensor; a memory; a communication interface; and a controller coupled with the photosensor, the communication interface, and the memory, wherein the controller is configured to; sample from the photosensor a first value representing an intensity of light within a first spectral range at a non-task location within an architectural space, wherein the first spectral range comprises a spectral range within the visual spectrum and does not include the entire visual spectrum; calculate a first change in a light output within the first spectral range of a light source to produce a desired amount of light within the first spectral range at a task location based on the first value, wherein the task location and the non-task locations are different locations within the architectural space; increase or decrease the first change in the light output within the first spectral range of the light source to ensure that the light source will produce a desired white light intensity at the task location; and transmit via the communication interface the first change in a light output within the first spectral range to the light source; wherein the first change in a light output within the first spectral range is calculated from the following equation;
PercentChangei=func(desiredi−
Sensori*ki−
TaskFCi+WallFCi*ki)*Giwherein PercentChangei represents a percent change in the first spectral range output of the light source, wherein desiredi represents a desired first spectral range level at the task location, wherein Sensori represents the sampled light intensity of the first spectral range at the non-task location, wherein ki represents a non-task-to-task translation constant, wherein TaskFCi represents a fixture contribution at the task location for a given percentage of light output of the ith light source in the first spectral range, wherein WallFCi represents a fixture contribution at the non-task location for a given percentage of light output of the ith light source in the first spectral range; and wherein Gi represents a predetermined gain. - View Dependent Claims (2, 3, 4, 5, 6, 7, 14)
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8. A method comprising:
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sensing a light intensity of a color channel at a non-task location within an architectural space, wherein the color channel comprises a spectral range within the visual spectrum and does not include the entire visual spectrum; calculating a change in the color channel output of a light source to produce a desired amount of light in the color channel at a task location based on the sensed light intensity of the color channel at the non-task location, wherein the task location and the non-task locations are different locations within the architectural space; increasing or decreasing the change in the color channel output of the light source to ensure that the light source will produce a desired white light intensity at the task location; and transmitting the change in the color channel output to the light source; wherein the calculating a change in the color channel output further comprises determining a percentage change in the color channel output of the light source from the following equation;
PercentChangei=func(desiredi−
Sensori*ki−
TaskFCi+WallFCi*ki)*Giwherein PercentChangei represents a percent change in the color channel output of the light source, wherein desiredi represents a desired color channel level at the task location, wherein Sensori represents a sensed light intensity of the color channel at the non-task location, wherein ki represents a non-task-to-task translation constant, wherein TaskFCi represents a fixture contribution at the task location for a given percentage of light output of the ith light source in the first spectral range, wherein WallFCi represents a fixture contribution at the non-task location for a given percentage of light output of the ith light source in the first spectral range; and wherein Gi represents a gain for the color channel. - View Dependent Claims (9, 10, 11, 12)
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13. A method comprising:
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sensing a light intensity of a first color channel at a non-task location within an architectural space, wherein the first color channel comprises a spectral range within the visual spectrum and does not include the entire visual spectrum; sensing the light intensity of a second color channel at the non-task location; sensing the light intensity of a third color channel at the non- task location; calculating a change in the first color channel output of a light source to produce a desired amount of light in the first color channel at a task location based on the sensed light intensity of the first color channel at the non-task location, wherein the task location and the non-task locations are different locations within the architectural space; calculating a change in the second color channel output of the light source to produce a desired amount of light in the second color channel at the task location based on the sensed light intensity of the second color channel at the non-task location; calculating a change in the third color channel output of the light source to produce a desired amount of light in the third color channel at the task location based on the sensed light intensity of the third color channel at the non-task location; increasing or decreasing at least one of the change in the first color channel output of the light source, the change in the second color channel output of the light source; and
the change in the third color channel output of the light source to ensure that the light source will produce a desired white light intensity at the task location; andtransmitting the change in the first color channel output, the second color channel output, and the third color channel output to the light source; wherein the calculating a change in the color channel output further comprises determining a percentage change in the color channel output of the light source from the following equation;
PercentChangei=func(desiredi−
Sensori*Ki−
TaskFCi+−
WallFC*Ki)*Gi wherein PercentChangei represents a percent change in the color channel output of the light source, wherein desiredi represents a desired color channel level at the task location, wherein Sensori represents a sensed light intensity of the color channel at the non-task location,wherein Ki represents a non-task-to-task translation constant, wherein TaskFCi represents a fixture contribution at the task location for a given percentage of light output of the ith light source in the first spectral range, wherein WallFCi represents a fixture contribution at the non-task location for a given percentage of light output of the ith light source in the first spectral range; and wherein Gi represents a gain for the color channel. - View Dependent Claims (15, 16)
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17. A method comprising:
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sending a command to a light fixture to illuminate an architectural space with a first percentage of light within a first spectral range; detecting an amount of light within a first spectral range incident on a photosensor at a task location; storing the amount of light within the first spectral range incident on the photosensor at the task location in a fixture contribution table in conjunction with the first percentage; detecting an amount of light within the first spectral range incident on the photosensor at a non-task location; storing the amount of light within a second spectral range incident on the photosensor at the non-task location in the fixture contribution table in conjunction with the first percentage; sending a command to a light, fixture to illuminate an architectural space with a second percentage of light within the first spectral range, wherein the second percentage of light is different than the first percentage of light; detecting an amount of light within the first spectral range incident on the photosensor at the task location; storing the amount of light within the first spectral range incident on the photosensor at the task location in the fixture contribution table in conjunction with the second percentage; detecting an amount of light within the first spectral range incident on the photosensor at the non-task location; storing the amount of light within the second spectral range incident on the photosensor at the non-task location in the fixture contribution table in conjunction with the second percentage; sending a command to a light fixture to illuminate an architectural space with the first percentage of light within a second spectral range; detecting an amount of light within the second spectral range incident on the photosensor at the task location; storing the amount of light within the second spectral range incident on the photosensor at the task location in the fixture contribution table in conjunction with the first percentage; detecting an amount of light within the second spectral range incident on the photosensor at the non-task location; storing the amount of light within the second spectral range incident on the photosensor at the non-task location in the fixture contribution table in conjunction with the first percentage; sending a command to a light, fixture to illuminate an architectural space with the second percentage of light within the second spectral range; detecting an amount of light within the second spectral range incident on the photosensor at the task location; storing the amount of light within the second spectral range incident on the photosensor at the task location in the fixture contribution table in conjunction with the second percentage; detecting an amount of light within the second spectral range incident on the photosensor at the non-task location; and storing the amount of light within the second spectral range incident on the photosensor at the non-task location in the fixture contribution table in conjunction with the second percentage; wherein the first spectral range comprises a spectral range within of the visual spectrum, the second spectral range comprises a spectral range that is a different spectral range within the visual spectrum than the first spectral range, the third spectral range comprises a spectral range that is a different spectral range within the visual spectrum than the first spectral range and the second spectral range; wherein the first spectral range does not include the entire visual spectrum; wherein the second spectral range does not include the entire visual spectrum; and wherein the third spectral range does not include the entire visual spectrum; calculating a first task-to-not-task translation value from the amount of light within the first spectral range incident on the photosensor at the task location and the amount of light within the first spectral range incident on the photosensor at the non-task location for the first light percentage; calculating a second task-to-not-task translation value from the amount of light within the first spectral range incident on the photosensor at the task location and the amount of light within the first spectral range incident on the photosensor at the non-task location for the second light percentage; calculating a third task-to-not-task translation value from the amount of light within the second spectral range incident on the photosensor at the task location and the amount of light within the second spectral range incident on the photosensor at the non-task location for the first light percentage; calculating a fourth task-to-not-task translation value from the amount of light within the second spectral range incident on the photosensor at the task location and the amount of light within the second spectral range incident on the photosensor at the non-task location for the second light percentage; and storing the first task-to-not-task translation value, the second task-to-not-task translation value, the third task-to-not-task translation value, and the fourth task-to-not-task translation value in the fixture contribution table.
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Specification