Lighting controller with compensation for eye adaptability characteristics
First Claim
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1. Apparatus for controlling luminance in a space, the luminance being produced by a variable light source, comprising:
- command means for receiving input commands indicative of changes in desired luminance in a first space; and
control means responsive to the input commands received by said command means for controlling a variable light source in the first space so that the luminance produced thereby changes in accordance with a rate function corresponding to adaptability of the human eye to changes in luminance.
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Abstract
Light control apparatus and method in which commanded changes in luminance in a space are executed in accordance with a rate function generated by a function generator to correspond to adaptability of the human eye to changes in luminance. A luminance sensor detects the luminance to which a person occupying the space was exposed just prior to the commanded change in luminance. The sensed luminance is used to determine the discrimination range of the occupant, and, upon a commanded increase in luminance in the space, the luminance is immediately increased to within the range.
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Citations
18 Claims
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1. Apparatus for controlling luminance in a space, the luminance being produced by a variable light source, comprising:
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command means for receiving input commands indicative of changes in desired luminance in a first space; and control means responsive to the input commands received by said command means for controlling a variable light source in the first space so that the luminance produced thereby changes in accordance with a rate function corresponding to adaptability of the human eye to changes in luminance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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- 11. A method of controlling the intensity of illumination in a space, comprising the step of, upon a commanded change in intensity, changing the intensity in accordance with a rate function corresponding to adaptability of the human eye to changes in illumination intensity.
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15. A lighting control system for controlling a variable light source in a first space which a user can enter from a second space, the lighting control system comprising:
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a light controller for varying the energization supplied to the variable light source in response control signals supplied thereto; a first luminance sensor adapted to produce a first luminance signal indicative of luminance in the second space; command input means adapted to produce an input command signal indicative of finally desired luminance in the first space; and an adaptive control processor connected to receive the first luminance signal and the input command signal from said first luminance sensor and said command input means, and connected to supply control signals to said light controller, said adaptive control processor being adapted to respond to the input command signal by generating a control signal adapted to cause the luminance in the first space to change to the finally desired luminance in accordance with a rate function corresponding to adaptability of the human eye to changes in luminance. - View Dependent Claims (16, 17, 18)
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Specification