Accession Number : ADD008700

Title :   Equi-Visibility Lighting Control System.

Descriptive Note : Patent,


Personal Author(s) : Pierpoint,William

Report Date : 16 Jun 1981

Pagination or Media Count : 9

Abstract : A system and method are described for providing substantially constant visibility over a task area within a work area with time in which the visibility provided by natural daylight illumination is supplemented by a variable artificial illumination from luminaires to maintain a specified visibility. The background luminance and the difference luminance are determined as a function of the artificial illumination and the natural daylight. These relationships are used to determine the actual visibility at the task. The actual visibility is then compared with a criterion visibility and the intensity of the artificial illumination from the luminaires is varied to bring the actual visibility to the criterion visibility. (Author)

Descriptors :   *Patents, *Lighting equipment, *Adaptive control systems, Buildings, Sunlight, Utilization, Energy conservation, Illumination, Variations, Photodetectors, Microprocessors, Visibility

Subject Categories : Computer Hardware
      Air Condition, Heating, Lighting & Ventilating

Distribution Statement : APPROVED FOR PUBLIC RELEASE