Patent ID: 8415892
Filing Date: 2013-04-09
Classification: H05B,Y02B

Abstract:
1. A voltage-limiting and reverse polarity series type LED device that parallel-connects one or more homopolar parallel-connected or series-connected or series and parallel-connected LEDs and zener diodes of the same working polarity in order to form the first LED and zener diode set; and a second LED and zener diode set constituted of one or more homopolar parallel-connected or series-connected or parallel and series-connected LEDs connected in parallel with zener diodes of the same working polarity, wherein through the reverse-polarity series connection of the first LED and zener diode set with the second LED and zener diode set, a voltage-limiting and reverse polarity series type LED device is formed, said voltage-limiting and reverse polarity series type LED device comprising: LED ( LED ( zener diodes ( LED ( the voltage-limiting and reverse polarity series type LED device is constituted by the reverse polarity series connection of the first LED and zener diode set with the second LED and zener diode set; the voltage-limiting and reverse polarity series type LED device is an integrated package composed of the two aforementioned sets of LED and zener diodes, or composed by the two aforementioned sets of LED and zener diodes in individual structures with external conductors to make reverse polarity series connection; the installation methods for its external conducting interface devices include one of: (i) the installation of a conducting interface device at terminal (a) which is the connection terminal of the first LED and zener diode set of the voltage-limiting and reverse polarity series type LED device; the installation of a conducting interface device at terminal (b) which is the connection terminal of the first LED and zener diode set with the second LED and zener diode set in reverse polarity series connection; and the installation of a conducting interface at terminal (c) which is the connection terminal of the second LED and zener diode set for application on alternating current power or direct current power polarity alternation; and (ii) the installation of a conducting interface device at terminal (a) which is the connection terminal of the first LED and zener diode set of the voltage-limiting and reverse polarity series type LED device; the non-installation of a conducting interface device at the connection terminal of the first LED and zener diode set with the second LED and zener diode set in reverse polarity series connection; and the installation of a conducting interface at the terminal (c) which is the connection terminal of the second LED and zener diode set for application on alternating current power or alternating polarity direct current power; and wherein alternating current power or alternating polarity direct current power is applied to the voltage-limiting and reverse polarity series type LED device and a current-limiting impedance element ( the impedance elements are constituted by one or more impedance elements which include 1) resistive impedance elements 2) capacitive impedance elements 3) inductive impedance elements 4) linear transistor impedance elements 5) chopped wave switch type elements composed of solid state switch type elements 6) chopped wave switch type elements composed of thyristors; and the series connection positions of the aforementioned impedance elements include 1) the impedance elements first connect with individual LEDs in series then connect in parallel with the zener diode; and/or 2) the impedance element is series-connected between the power source and the voltage-limiting and reverse polarity series type LED device; and/or 3) the LED and the diode with the same working polarity first connect in parallel then connect in series with the impedance element.