Patent ID: 11873980
Assignee: ABL IP HOLDING LLC
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC F  H  Y | IPC F  H

Claim 0:
1. A photocontrol for a lighting fixture, the photocontrol comprising:
(i) a first photosensor configured to detect a first ambient light level at a first section of the photocontrol,
(ii) a second photosensor configured to detect a second ambient light level at a second section of the photocontrol,
(iii) a third photosensor configured to detect a third ambient light level at a third section of the photocontrol, wherein the first, second and third sections of the photocontrol receive various ambient light levels at various periods of a diurnal cycle, and
a microprocessor configured for:
determining, at a first time period of the diurnal cycle, respective first pairwise instant ambient light differentials between first light levels detected respectively by each pair of the first, second, and third photosensors;
determining, at a second time period of the diurnal cycle, respective second pairwise instant ambient light differentials between second light levels detected respectively by each pair of the first, second, and third photosensors;
calculating a first temporal ambient light differential between the first section and the second section of the photocontrol, a second temporal ambient light differential between the first section and the third section of the photocontrol, and a third temporal ambient light differential between the second section and the third section of the photocontrol, the first, second, and third temporal ambient light differentials being based on the respective first pairwise instant ambient light differentials at the first time period of the diurnal cycle and the respective second pairwise instant ambient light differentials at the second time period of the diurnal cycle;
identifying, based on a comparison of the first, second, and third temporal ambient light differentials, that the first photosensor is a triggering photosensor of the photocontrol, wherein the comparison of the first, second, and third temporal ambient light differentials indicates that the first photosensor has detected ambient light levels having a least variation between the first and second time periods of the diurnal cycle; and
modifying, based on a fourth ambient light level detected via the triggering photosensor, an output level of a lighting element of the lighting fixture.