Patent ID: 8018172
Filing Date: 2011-09-13
Classification: H05B,Y02B

Abstract:
1. An LED driver comprising: an input configured to accept an AC signal; a rectifier in electrical communication with the input, the rectifier configured to rectify the AC signal into a pulse train comprising one or more pulses; a comparator in electrical communication with the rectifier, the comparator configured to utilize a voltage threshold whereby the comparator outputs a first signal while a voltage of the one or more pulses is above the voltage threshold and outputs a second signal while the voltage of the one or more pulses is below the voltage threshold; a controller in electrical communication with the comparator, the controller configured to determine a pulse width of the one or more pulses and a period of the AC signal from the first signal and the second signal whereby the controller is configured to determine a desired level of light output based on a ratio of the pulse width to the period and generate an output signal configured to provide the desired level of light output through LED lighting; and an output configured to provide the output signal to the LED lighting.