METHODS, SYSTEMS, AND APPARATUS FOR INTELLIGENT LIGHTING
First Claim
1. A lighting fixture to illuminate an environment, the lighting fixture comprising:
- A) a memory to store a first transfer function mapping first ambient light levels at a first position within the environment to corresponding second ambient light levels at a second position within the environment;
B) an ambient light sensor to measure an actual ambient light level at the first position within the environment;
C) a processor, communicatively coupled to the memory and the ambient light sensor, to determine;
C1) an expected ambient light level at the second position, based on the actual ambient light level measured at the first position and the first transfer function stored in the memory; and
C2) a change in a light output of the lighting fixture to provide a desired ambient light level at the second position, based at least in part on the expected ambient light level at the second position; and
D) at least one light source, communicatively coupled to the processor, to generate the change in the light output of the lighting fixture so as to provide the desired ambient light level at the second position.
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Accused Products
Abstract
An ambient light sensor measures an ambient light level at one point in an illuminated environment, such as a warehouse, office, shop, cold-storage facility, or industrial facility, and provides an indication of the measured ambient light level to a processor. The processor maps the measured ambient light level to an estimated ambient light level at a different point in the illuminated environment from the measured ambient light level (e.g., a “task height” about three feet from a warehouse floor). The processor may determine the difference between the estimated ambient light level and a desired light level at the task height, and may change the artificial illumination provided by a light fixture to make the actual ambient light level at task height match the desired light level at the task height.
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Citations
21 Claims
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1. A lighting fixture to illuminate an environment, the lighting fixture comprising:
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A) a memory to store a first transfer function mapping first ambient light levels at a first position within the environment to corresponding second ambient light levels at a second position within the environment; B) an ambient light sensor to measure an actual ambient light level at the first position within the environment; C) a processor, communicatively coupled to the memory and the ambient light sensor, to determine; C1) an expected ambient light level at the second position, based on the actual ambient light level measured at the first position and the first transfer function stored in the memory; and C2) a change in a light output of the lighting fixture to provide a desired ambient light level at the second position, based at least in part on the expected ambient light level at the second position; and D) at least one light source, communicatively coupled to the processor, to generate the change in the light output of the lighting fixture so as to provide the desired ambient light level at the second position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of illuminating an environment with a lighting fixture, the method comprising:
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A) storing, in a memory, a first transfer function mapping ambient light levels at a first position within the environment to corresponding ambient light levels at a second position within the environment; B) measuring, with an ambient light sensor, an actual ambient light level at the first position within the environment; C) determining an expected ambient light level at the second position, based at least in part on the first transfer function stored in A) and the actual ambient light level at the first position measured in B); D) determining a change in a light output of the lighting fixture to provide a desired ambient light level, based at least in part on the expected ambient light level at the second position determined in C); and E) causing the change in the light output of the lighting fixture determined in D) so as to provide the desired ambient light level at the second position. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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21-37. -37. (canceled)
Specification