Multiloop control circuit and control method thereof

Abstract

The invention discloses a multiloop control circuit and a control method thereof. The multiloop control circuit comprises a control unit, at least two main lines, at least two first control switches and at least two second control switches, wherein the control unit is supplied with the power source by a power source input unit and is used for outputting a control signal. The first end of each main line is connected with a power source end by the first control switch and is grounded by the second control switch, and two LEDs having opposite polarity are connected between second ends of random two main lines in parallel; control ends of the first control switch and the second switch are respectively connected with an output end of the control unit, the first control switch and the second controls witch receive the control signal output by the control unit and are at a conducting state or a closing state according to the control signal. The invention can realize N*(N-1) loop by N main lines so as to reduce the using amount of the main lines, greatly simplify the circuit structure and also reducing the cost of products.

Description

【Technical field】 [0001] The invention relates to a multi-loop control circuit and a control method thereof. 【Background technique】 [0002] In order to achieve a good decorative effect, the traditional decorative light strings are generally set to have the function of strobe or color change or both, especially the Christmas decorative light strings. In order to create a icy and snowy atmosphere, a snow Effect of the decorative light string more and more people of all ages. The circuit principle diagram of decorative lamp product in this prior art refers to figure 1 As shown, the existing design is a circuit design using N+1 main lines to realize N loops. The product shown in the figure includes 16 series-connected light strings 10, which are composed of three LED diodes connected in series. One end of each series light string 10 is connected in parallel with the main line L17, and the main line L17 is electrically connected with a DC power supply, and the other end of eac...

AI Technical Summary

Problems solved by technology

There are many disadvantages in this design. First, there are too many main lines close to the control chip. If there are N loops, there will be N+1 main lines, while the main lines away from the control chip will gradually decrease. The lines of the entire decorative light are tapered. This decorative light The appearance is ugly, the overall decorative effect is poor, and the main line is also particularly wasted; secondly, if N loops are to be realized, N main lines must be connected to the control chip for control. If the decorative lamp uses more loops, the entire The circuit design is particularly complicated; similarly, if there are more loops, the pins of the control chip used will also increase, the corresponding control circuit board will increase accordingly and the electronic components will also increase accordingly, and the shape of the decorative lamp will appear large. Small defects, the more circuits of decorative lights, the higher the cost, this design is not easy to be widely used in the market

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