Driving circuit of LED lamp
A technology for driving circuits and LED lamps, which is applied in the layout of electric lamp circuits, electric light sources, lighting devices, etc., can solve problems such as the inability of LED lamps to work, and achieve the effect of reducing the damage rate
Inactive Publication Date: 2015-02-25
GUANGXI UNIV
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Problems solved by technology
[0003] The technical problem mainly solved by the present invention is to provide a driving circuit for LED lamps, which can not only reduce the damage rate of LED light-emitting diodes, but also prevent the whole LED lamp from being unable to work due to the damage of one LED light-emitting diode.
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[0007] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific implementation methods.
[0008] like figure 1 As shown, a driving circuit for an LED lamp includes a constant-voltage battery E, a filter capacitor C1, a high-frequency bypass capacitor C2 and four driving branches; the constant-voltage battery E can be directly connected to an alternating current through a charger for charging ; The filter capacitor C1 and the high-frequency bypass capacitor C2 are connected in parallel; the driving branch is connected in parallel with the high-frequency bypass capacitor C2, and each driving branch is connected in parallel; the first driving branch includes a first resistor R1 , the second resistor R2, the diode VD n , Transistor VT n and 7 LED light-emitting diodes connected in series, one end of the first resistor R1 is connected to the positive pole of the constant voltage storage battery E, and the other end...
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A driving circuit of an LED lamp comprises a constant voltage storage battery, a filter capacitor, a high-frequency bypass capacitor and a plurality of driving branch circuits, wherein the filter capacitor and the high-frequency bypass capacitor are connected in parallel, the driving branch circuits are connected with the high-frequency bypass capacitor in parallel, and the driving branch circuits are connected in parallel. Each driving circuit branch circuit comprises a first resistor, a second resistor, a diode, a triode and LEDs connected in series, wherein one end of the first resistor is connected with the positive electrode of the constant voltage storage battery, the other end of the first resistor is connected with the base electrode of the triode, one end of the diode is connected with the base electrode of the triode, the other end of the diode is grounded, one end of the LEDs connected in series is connected with the collector electrode of the triode, the other end of the LEDs connected in series is grounded, the emitting electrode of the triode is connected with one end of the second resistor, and the other end of the second resistor is connected with the positive electrode of the constant voltage storage battery. Due to the driving circuit of the LED lamp, the fault rate of the LEDs can be reduced, and the situation that because one LED is damaged, a whole LED lamp cannot work can be avoided.
Description
technical field [0001] The invention relates to a driving circuit, more specifically to a driving circuit of an LED lamp. Background technique [0002] LED light-emitting diodes came out in the 1960s, and they were only used for various indicator lights at first. With the rapid development of electronic technology, LED light-emitting diodes have become more and more widely used. Because LED light-emitting diodes have many advantages, for example, LED light-emitting diodes are basically a small chip encapsulated in epoxy resin, so its volume is very small and very light; LED light-emitting diodes consume very low power, generally It is said that the working voltage of the LED light-emitting diode is 2-3.6V, and it only needs a very weak current to emit light normally; the LED light-emitting diode uses cold light-emitting technology, and the calorific value is much lower than that of ordinary lighting fixtures of the same power; the LED light-emitting diode is made of non-toxi...
Claims
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Inventor 张鲁云
Owner GUANGXI UNIV