Multi-loop decorative lamp and decorative lamp bank

Abstract

The invention discloses a multi-loop decorative lamp, comprising a controller, a lighting tube and at least two main lines; the controller comprises a control unit, at least two first control switches and at least two second control switches; the first end of each main line is connected with a power supply end through the first control switch, and is grounded through the second control switch; the control ends of the first control switch and the second control switch are connected with the output end of the control unit; the first control switch and the second control switch are switched on or off according to the control signal output by the control unit; the lighting tube comprises a core wire; the main lines are arranged in the core wire; two groups of LEDs with opposite polarities are connected between the second ends of any two main lines in parallel; a longitudinal through hole is arranged along the length direction of the core wire; an open slot is arranged along the longitudinal through hole; the LEDs are arranged in the longitudinal through hole; and a transparent layer is coated outside the core wire. The invention adopts N main lines to achieve N*(N-1) loops, thereby reducing the number of the main lines, simplifying the circuit structure, and also reducing the product cost.

Description

【Technical field】 [0001] The invention relates to a decorative lamp, in particular to a multi-circuit decorative lamp and a decorative lamp group. 【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 ...

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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