Patent ID: 8058814
Filing Date: 2011-11-15
Classification: H05B,Y02B

Abstract:
1. A bi-directional light emitting diode drive circuit in pulsed power series resonance, which uses an capacitive impedance component in a first impedance and an inductive impedance component in a second impedance, wherein the inherent series resonance of the first impedance and second impedance in series connection is the same as the pulse period of the input pulsed power, thereby to generate a series resonance status; in the series resonance, the bi-directional divided power in series resonance is formed across the two ends of the capacitive impedance component or the inductive impedance component, thereby to drive a bi-directional conducting light emitting diode set which is parallel connected across the two ends of either the first impedance or the second impedance to emit light; wherein the bi-directional light emitting diode drive circuit (U 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) the half-wave or full-wave DC pulsed power rectified from AC power with constant or variable voltage and constant or variable frequency; the bi-directional divided power in series resonance formed by the first and second impedances in series resonance is used to drive at least one bi-directional conducting light emitting diode set which is parallel connected across two ends of either the first impedance or the second impedance, or to drive at least two bi-directional conducting light emitting diode sets which are respectively parallel connected across the two ends of the first impedance and the second impedance to receive the divided power across the two ends of the first impedance and the two ends of the second impedance thereby including the said bi-directional light emitting diode drive circuit in pulsed power series resonance; wherein it comprises: the first impedance (Z at least one capacitive impedance component, or two or more than two capacitive impedance components in series connection or parallel connection or series and parallel connection; or capacitive impedance components and the additional inductive impedance components or resistive impedance components which can be optionally installed as needed, wherein it can include one or more than one kinds and one or more than one impedance components, or by two or more than two kinds of impedance components, wherein each kind of the impedance components is respectively to be one of more than one in series connection or parallel connection or series and parallel connection; the second impedance (Z inductive impedance components and the additional capacitive impedance components or resistive impedance components which can be optionally installed as needed, wherein it can include one or more than one kinds and one or more than one impedance components, or by two or more than two kinds of impedance components, wherein each kind of the impedance components is respectively to be one of more than one in series connection or parallel connection or series and parallel connection; the first impedance (Z the bi-directional conducting light emitting diode set (L the bi-directional conducting light emitting diode set (L the bi-directional light emitting diode drive circuit in pulsed power series resonance, in the bi-directional light emitting diode drive circuit (U the bi-directional divided power in series resonance formed by the first and second impedances in series resonance is used to drive at least one bi-directional light emitting diode set which is parallel connected across the two ends of the first impedance or the second impedance, or to drive at least two bi-directional conducting light emitting diode sets which are respectively parallel connected across the two ends of the first impedance and the second impedance to receive the divided power across the two ends of the first impedance and the two ends of the second impedance thereby including the said bi-directional light emitting diode drive circuit in pulsed power series resonance; the first impedance (Z