Patent ID: 8207685
Filing Date: 2012-06-26
Classification: H05B

Abstract:
1. An LED driving device comprising a ground; multiple LED arrays, each LED array comprising multiple LEDs connected in series, and each LED having a threshold voltage; at least one dividing diode being mounted between adjacent LED arrays and having an anode and a cathode; a power module being connected to an external power source providing alternating current (AC) power being sinusoidal and having alternating negative and positive segments and the power module having a rectifier inverting the negative segments of the AC power to positive segments and forming a pulsating direct current (DC) voltage; a driving module being connected to the power module, receiving a pulsating DC voltage from the power module and outputting a constant current to the LED arrays; and at least one switch pair being connected respectively to the anode and cathode of a dividing diode, having a CLOSED state and an OPEN state that configure LED arrays in at least one LED array set; and a voltage sensing module sensing the pulsating DC voltage from the power module, being connected to the switch pairs, closing, opening the switch pairs and comprises wherein the control signal comprises