Patent ID: 8058820
Filing Date: 2011-11-15
Classification: H05B,Y02B

Abstract:
1. A uni-directional light emitting diode drive circuit in pulsed power parallel resonance wherein a pulsed power is used as the power source, a first impedance includes a capacitive impedance component, or an inductive impedance component or a resistive impedance component, and a second impedance includes an inductive impedance component and a capacitive impedance component in parallel connection, wherein its inherent parallel resonance frequency is the same as a pulse period of the pulsed power to appear parallel resonance status, wherein the two ends of the first impedance and the second impedance in series connection are provided to receive a DC pulsed power input 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; 1) capacitive impedance components, or inductive impedance components or resistive impedance components, wherein it can be optionally installed as needed one kind or more than one kind and one or more than one impedance components, or can be optionally installed as needed by two or more than two kinds of impedance components, wherein each kind of impedance components can be respectively one or more than one in series connection, or parallel connection, or series and parallel connection; or 2) the at least one capacitive impedance component and at least one inductive impedance component in series connection, wherein the inherent series resonance frequency of the two after series connection is the same as the period of a DC power of periodically alternated polarity, thereby to appear series resonance status; or 3) at least one capacitive impedance component and at least one inductive impedance component in parallel connection, wherein the inherent parallel resonance frequency of the two after parallel connection is the same as the period of a DC power of periodically alternated polarity, thereby to appear series resonance status;