Patent ID: 8063571
Filing Date: 2011-11-22
Classification: H05B

Abstract:
1. A bi-directional light emitting diode drive circuit in bi-directional divided power impedance, which uses capacitive, or inductive, or resistive impedance components to comprise at least one first impedance, and uses the capacitive, or inductive, or resistive impedance components to comprise at least one second impedance, as well as uses at least one first light emitting diode and at least one second light emitting diode in parallel connection of reverse polarities to comprise at least one bi-directional conducting light emitting diode set which is parallel connected across two ends of the at least one second impedance; two ends of the at least one first impedance and the at least one second impedance in mutual series connection are provided to receive the following: 1) AC power with a constant or variable voltage and a constant or variable frequency; or 2) AC power of bi-directional sinusoidal wave voltage or bi-directional square wave voltage, or bi-directional pulse wave voltage with constant or variable voltage and constant or variable frequency or period which is converted from a DC power source; or 3) AC power of bi-directional sinusoidal wave voltage or bi-directional square wave voltage, or bi-directional pulse wave voltage with constant or variable voltage and constant or variable frequency or period converted from DC power which is further rectified from AC power; 1) one or more than one kinds and one or more than one of the capacitive impedance components or inductive impedance components or resistive impedance components, or two or more than two kinds of impedance components, wherein each kind of impedance components has one or more than one components in series connection or parallel connection, or series and parallel connection; or 2) at least one capacitive impedance component and at least one inductive impedance component in mutual series connection, wherein their frequency is the same as the frequency of the bi-directional power from power source such as the AC power, or the alternated polarity period of a constant or variable voltage and constant or variable periodically alternated polarity power converted from DC power, thereby to appear a series resonance impedance status; or 3) at least one capacitive impedance component and at least one inductive impedance component in mutual parallel connection, wherein their frequency is the same as the frequency of the bi-directional power from power source such as the AC power, or the alternated polarity period of a constant or variable voltage and constant or variable periodically alternated polarity power converted from DC power, thereby to appear a parallel resonance impedance status; or 1) one or more than one kinds and one or more than one of the capacitive impedance components or inductive impedance components or resistive impedance components, or two or more than two kinds of impedance components, wherein each kind of impedance components has one or more than one components in series connection or parallel connection, or series and parallel connection; or 2) at least one capacitive impedance component and at least one inductive impedance component in mutual series connection, wherein their frequency is the same as the frequency of the bi-directional power from power source such as the AC power, or the alternated polarity period of a constant or variable voltage and constant or variable periodically alternated polarity power converted from DC power, thereby to appear a series resonance impedance status; or 3) at least one capacitive impedance component and at least one inductive impedance component in mutual parallel connection, wherein their frequency is the same as the frequency of the bi-directional power from power source such as the AC power, or the alternated polarity period of a constant or variable voltage and constant or variable periodically alternated polarity power converted from DC power, thereby to appear a parallel resonance impedance status; 1) the AC power with a constant or variable voltage and a constant or variable frequency; or 2) the AC power of bi-directional sinusoidal wave voltage or bi-directional square wave voltage, or bi-directional pulse wave voltage with constant or variable voltage and constant or variable frequency or period which is converted from a DC power source; or 3) the AC power of bi-directional sinusoidal wave voltage or bi-directional square wave voltage, or bi-directional pulse wave voltage with constant or variable voltage and constant or variable frequency or period converted from the DC power which is further rectified from an AC power; in the bi-directional light emitting diode drive circuit (U the first impedance (Z the divided power is formed at the first impedance and the second impedance in series connection through the above said powers to drive at least one bi-directional conducting light emitting diode set, 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 two ends of the second impedance, thereby to comprise the bi-directional light emitting diode drive circuit in bi-directional divided power impedance, wherein a diode (CR