FLICKER-FREE LAMP DIMMING-DRIVER CIRCUIT FOR SEQUENTIAL LED BANK CONTROL

摘要

An LED dimmer circuit to sequentially control multiple banks of LEDs connected in series. The invention is designed to respond to demands for more or less illumination by sequentially turning on or off one or more banks of LEDs. Each bank is turned off or on in response to the phase angle of an AC power source with each LED bank being controlled by a different phase angle.

主权项

1. An LED dimmer circuit, comprising
an AC power source; a plurality of LED banks connected in series; a plurality of switching circuits for applying dimming signals to said plurality of LED banks, said dimming signals being controlled by a control signal having at least one variable characteristic wherein varying said characteristic reduces the illumination of individual LED banks included in the plurality of LED banks; and a plurality of control circuits for generating said control signal to control said switching circuits so that said dimming signal applied to each individual LED bank in response to said control signal is different for each individual LED bank.