CN209861221U - Low-voltage parallel welding lamp string circuit for realizing normal work of LED breakdown - Google Patents

Abstract

The utility model discloses a realize LED puncture and normally work's parallelly connected welding lamp cluster circuit of low pressure, including a plurality of LED lamps, the series welding has a resistance on the lamp base of every LED lamp, connects in parallel a plurality of LED lamps that have a resistance through the wire connected mode again, constitutes a component, again with a plurality of the component establish ties.

Description

Low-voltage parallel welding lamp string circuit for realizing normal work of LED breakdown

Technical Field

The utility model relates to a LED lamp cluster technical field especially relates to a realize that LED punctures and parallelly connected welding lamp cluster circuit of low pressure of normal work.

Background

Low voltage light strings are typically made of mechanically interchangeable LEDs and non-interchangeable LEDs such as soldered or injection molded.

Regardless of the mechanical structure, the load LED can never escape the series connection of a plurality of LEDs and then is connected in parallel, or the parallel connection of a plurality of LEDs and then is connected in series, and the purpose is to match the output voltage of the driving power supply.

However, in the structure of automatically producing low-voltage irreplaceable welding lamp strings by a machine, in order to improve the welding efficiency or meet the lamp strings with various lamp numbers required by customers, a structural mode of firstly connecting in parallel and then connecting in series is adopted. Meanwhile, the LEDs are also directly connected in series or in parallel, and the damage and short circuit of the LEDs are not considered for effective protection, so that the circuit cannot keep safe, reliable and normal work. And even serious safety hazards.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the purpose is exactly in order to remedy prior art's defect, provides a realize that LED punctures and the parallelly connected welding lamp cluster circuit of low pressure of normal work.

The utility model discloses a realize through following technical scheme:

a low-voltage parallel welding lamp string circuit for realizing LED breakdown and normal work comprises a plurality of LED lamps, wherein a resistor is welded on a lamp pin of each LED lamp in series, the LED lamps welded with the resistors are connected in parallel in a wire connecting mode to form a component, and a plurality of components are connected in series.

An isolation post is applied on each LED lamp pin.

And the outside of each LED lamp is fixedly protected by a heat-shrinkable sleeve.

The utility model has the advantages that: the utility model discloses the realization lets all parallelly connected LED of it normally work when the short circuit that LED or a plurality of LED lead to under any circumstance, has also guaranteed whole product normal work simultaneously.

Drawings

Fig. 1 is a conventional circuit configuration.

Fig. 2 is a schematic structural diagram of the present invention.

FIG. 3 is a block diagram of an embodiment.

Detailed Description

As shown in fig. 2, a low-voltage parallel welding lamp string circuit for realizing normal operation of LED breakdown includes a plurality of LED lamps 1, a resistor 2 is welded in series on a lamp pin of each LED lamp 1, the plurality of LED lamps 1 welded with the resistor 2 are connected in parallel by a wire connection mode to form a component 3, and then the plurality of components 3 are connected in series.

An isolation column is applied on each LED lamp 1 pin.

The outside of each LED lamp 1 is fixedly protected by a heat shrink sleeve.

1. In a conventional principle mode, a circuit diagram is shown in fig. 1, and it can be seen that n =90, that is, each group of parallel LEDs =90, and 10 groups are total, where 10 groups are 3V × 10=30V, so that the power supply provides the string with appropriate current to let the LEDs light up to let the string operate normally, and 90 × 10=900 strings realize our 900 lamps.

When one LED breaks down and other conditions cause short circuit such as A, the group of 90 LEDs connected in parallel is not bright, so that the product has serious functional defects, particularly, the load voltage is reduced by 3V due to the short circuit, the current of the lamp string rises sharply, and even great potential safety hazards occur.

2. The novel principle mode is shown in a circuit diagram in figure 2.

The number of the series-connected components is determined according to the selected resistance value of the resistor, for example, if the resistance value R =120 Ω is adopted, 9 components can be connected in series, 100 lamps of each component are connected in parallel, and a string of lamps of 100 × 9=900 lamps is realized.

If the LED is short-circuited, the resistance of the R and the LED in the original circuit is replaced by the resistance in series in the loop, that is, even if the LED is short-circuited, the resistance R is still in the loop, so that only the LED is not lighted, and the remaining 99 LEDs in the parallel combination elements continue to work normally.

As shown in fig. 3, this figure cuts an embodiment of the inventive structure of parallel LEDs in each component.

1. A is LED, B is isolation column, C is resistor, and D is wire

2. Detailed description of the preferred embodiments

The resistor C and the LED, namely one lamp foot of the LED A, are welded in series, an isolation column is applied to the LED lamp foot to carry out isolation protection to prevent short circuit between the lamp feet, the LED lamp foot and the rest LEDs are correspondingly welded through a lead, namely, a parallel connection mode is realized, and then the outside of each LED is fixedly protected through a heat-shrinkable sleeve.

The utility model discloses a typical characteristic is that there is welding resistance C on the pin to and every LED is that there are 4 or more wires in the lamp export, like D.

Claims (3)

1. The utility model provides a realize LED puncture and normally work's parallelly connected welding lamp cluster circuit of low pressure which characterized in that: the LED lamp comprises a plurality of LED lamps, a resistor is welded on a lamp pin of each LED lamp in series, the LED lamps welded with the resistors are connected in parallel in a wire connecting mode to form a component, and a plurality of components are connected in series.

2. The low-voltage parallel welding lamp string circuit for achieving normal operation of LED breakdown as claimed in claim 1, wherein: an isolation post is applied on each LED lamp pin.

3. The low-voltage parallel welding lamp string circuit for achieving normal operation of LED breakdown as claimed in claim 1, wherein: and the outside of each LED lamp is fixedly protected by a heat-shrinkable sleeve.