Patent ID: 11871489
Assignee: LUTRON TECHNOLOGY COMPANY LLC
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  F | IPC F  H

Claim 5:
6. The lighting device of claim 5 wherein responsive to determine the operating state a determination that the lighting device should be placed in the INTERIM state, the control circuit to:
increment a failure counter;
cause the drive circuit to provide an adjusted drive current to the at least one emitter using the data representative of the forward voltage across the photodetector;
calculate a second difference between the forward voltage across the at least one emitter at the adjusted drive current and the forward voltage across the photodetector; and
determine whether the second difference exceeds the defined threshold value; and
responsive to the determination that the second difference exceeds the defined threshold value:
increment the failure counter;
determine whether the failure counter exceeds a defined failure count threshold value; and
cause the lighting device to enter the INOPERATIVE state responsive to the determination that the failure counter exceeds the defined failure count threshold value.