Patent ID: 8049440
Filing Date: 2011-11-01
Classification: H05B

Abstract:
1. A uni-directional light emitting diode drive circuit in pulsed power non-resonance, wherein a pulsed power is used as the power source, a first impedance includes a capacitive impedance component, or inductive impedance component or resistive impedance component, and capacity impedance and inductive impedance are in parallel connection wherein their parallel resonance frequency is different from the pulse period of the pulsed power, comprising the second impedance without parallel resonance, wherein the two ends of the first impedance and the second impedance in series connection are provided to receive a DC pulsed power input as power source which includes the following: 1) DC pulsed power; or 2) the DC pulsed power with constant or variable voltage and constant or variable periods converted from DC power source; or 3) the DC pulsed power with constant or variable voltage and constant or variable periods converted from DC power which is further rectified from AC power; or 4) half-wave or full-wave DC pulsed power rectified from AC power with constant or variable voltage and constant or variable frequency; the first impedance and the second impedance in series connection are provided to divide the inputted DC pulsed voltage, to form a bi-directional divided alternated power across the two ends of the second impedance, wherein the divided power at the second impedance is rectified by a rectifier device to an uni-directional DC power to drive an uni-directional conducting light emitting diode, and it is characterized in that the volume and weight of the circuit can be effectively reduced as well as the cost can be lowered for the uni-directional light emitting diode drive circuit in pulsed power non-resonance in high frequency pulsed power applications; the first impedance, the second impedance, the rectifier device and the uni-directional conducting light emitting diode set as well as the light emitting diode and various optional auxiliary circuit components are based on application needs, wherein the circuit components can be optionally installed or not installed as needed and the installed quantity may include one circuit component, wherein if more than one are selected, the corresponding polarity relationship shall be determined based on circuit function requirement to execute series connection, or parallel connection or series and parallel connections.