System and method for color creation and matching
First Claim
1. A method of controlling the output of a light fixture that includes a light source, the method comprising:
- calculating a first separation between a desired color location within a color space and a light source location for the light source within the color space;
setting a control value for the light source based on the first separation;
modifying the control value for the light source;
calculating a light fixture output based on the modified control value for the light source;
determining a light fixture output location within the color space based on the light fixture output;
calculating a second separation between the light fixture output location and the desired color location; and
driving the light source based on the modified control value when the second separation is less than or equal to a threshold value.
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Accused Products
Abstract
Systems and methods for controlling an output of a luminaire. The luminaire uses stored spectral information for light sources within the luminaire to determine a coordinate for each light source within a color space. A desired output color is also converted to a coordinate within the color space. The distance between the desired output color coordinate and each of the coordinates corresponding to the light sources is calculated to select initial control values for the light sources. The initial control values for each light source are individually modified by a step size value, the total output of the luminaire is calculated and converted to a coordinate within the color space, and the distance between the total luminaire output coordinate and the desired color coordinate is calculated. The control values for the light sources are iteratively modified until the luminaire output coordinate is within a threshold value of the desired color output.
97 Citations
20 Claims
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1. A method of controlling the output of a light fixture that includes a light source, the method comprising:
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calculating a first separation between a desired color location within a color space and a light source location for the light source within the color space; setting a control value for the light source based on the first separation; modifying the control value for the light source; calculating a light fixture output based on the modified control value for the light source; determining a light fixture output location within the color space based on the light fixture output; calculating a second separation between the light fixture output location and the desired color location; and driving the light source based on the modified control value when the second separation is less than or equal to a threshold value. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A light fixture comprising:
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a light source; and a controller configured to determine a desired color location within a color space; determine a light source location within the color space for the light source; calculate a first separation between the desired color location and the light source location; set a control value for the light source based on the first separation; calculate a light fixture output based on the control value for the light source; determine a light fixture output location within the color space based on the light fixture output; calculate a second separation between the light fixture output location and the desired color location; drive the light source based on the control value when the second separation is less than or equal to a threshold value; modify the control value for the light source when the second separation is not less than or equal to the threshold value; calculate a second light fixture output based on the modified control value; determine a second light fixture output location within the color space based on the second light fixture output; calculate a third separation between the second light fixture output location and the desired color location; and drive the light source based on the modified control value when the third separation is less than or equal to the threshold value. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A method of controlling the output of a light fixture that includes a light source, the method comprising the steps of:
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calculating a first separation between a desired color location within a color space and a light source location for the light source within the color space; setting a control value for the light source based on the first separation; calculating a light fixture output based on the control value; determining a light fixture output location within the color space based on the calculated light fixture output; calculating a second separation between the light fixture output location and the desired color location; driving the light source based on the control value when the second separation is less than or equal to a threshold value; and modifying the control value for the light source when the second separation is not less than or equal to the threshold value. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification