Adaptive compensation for effects of cat-ear dimmers on conduction angle measurement

摘要

A dimmable light emitting lamp configured to interface with cat-ear dimmer switches. The lamp includes one or more light emitting devices. The lamp also includes circuitry configured to receive an input voltage and provide regulated current to the one or more light emitting devices. The input voltage has a first voltage pulse that does not represent a dimming level of a dimmer switch and a second voltage pulse that represents the dimming level of the dimmer switch. The circuitry determines a first duration corresponding to a length of the first voltage pulse and a second duration corresponding to a length of the second voltage pulse responsive to first duration. The circuitry adjusts the regulated current to the light emitting devices according to the second duration to adjust output light intensity of the light emitting devices.

主权项

1. A dimmable light emitting lamp, comprising:
one or more light emitting devices; and circuitry configured to receive a signal indicative of an input voltage of the dimmable light emitting lamp and to provide regulated current to the one or more light emitting devices based on the signal indicative of the input voltage, the input voltage having a first voltage pulse that does not represent a dimming level of a dimmer switch and a second voltage pulse that represents the dimming level of the dimmer switch, the first voltage pulse being adjacent to the second voltage pulse in time, wherein the circuitry is configured to determine a first duration corresponding to a length of the first voltage pulse and to determine a second duration corresponding to a length of the second voltage pulse responsive to the first duration, and wherein the circuitry is configured to adjust the regulated current to the light emitting devices according to the second duration corresponding to the length of the second voltage pulse to adjust output light intensity of the light emitting devices.