SYSTEMS AND METHODS OF PREVENTING STROBING LIGHT OUTPUT

摘要

Systems and methods for preventing or otherwise reducing cyclic light output caused by failure modes are disclosed, which shut off a power supply to a lighting system susceptible to output cycling (also known as flashing, flickering, or strobing) in a non-latching fashion. A power supply and/or driver system includes a processor and memory arrangement configured to track failures and prevent cyclical behavior when detected. The processor can be implemented, for example, with an existing microcontroller already present in the power supply, or as a dedicated processor. Once a failure mode that exhibits cyclic behavior above a certain frequency is detected, the power supply can be turned off or otherwise prevented from attempting to source power to the lighting system.

主权项

1. A method comprising:
upon start-up of a power supply, determining whether a non-volatile counter is greater than a threshold X, wherein the non-volatile counter tracks failed startup attempts of the power supply; and in response to determining that the non-volatile counter is greater than the threshold X:
delaying application of the power supply to a light source load connected thereto for a delay N;in response to the power supply not shutting down prior to the delay N passing, resetting the non-volatile counter; andin response to the power supply shutting down prior to the delay N passing, preventing power from being applied to the light source load to inhibit strobing of the light source load.