CN207201026U - A kind of LED photoelectric curtain - Google Patents

Abstract

The utility model discloses an LED photoelectric curtain, including a step-down transformer, an energy-saving voltage-stabilizing switching power supply, a switch and an LED photoelectric curtain body, wherein the step-down transformer is connected to alternating current, the energy-saving voltage-stabilizing switching power supply is electrically connected to the energy-saving voltage-stabilizing switching power supply and the switch through wires, and the switch is electrically connected to the LED photoelectric curtain body. The main line and branches of the utility model adopt flexible circuit boards to replace the wires in traditional LED curtain lights, without the need for cutting, and the LED adopts SMD LEDs to replace traditional plug-in LEDs, which can realize high-speed automatic SMD welding of LED SMD machines, with high production efficiency and low cost. Moreover, the added resistance and voltage-stabilizing elements designed in the circuit of the utility model have the functions of isolation effect, voltage division effect and voltage stabilization; therefore, the utility model has a reasonable design and a simple structure, and can filter out the harm of harmonics while ensuring the stability of the voltage of the switching power supply.

Description

A kind of LED photoelectric curtain

technical field

The utility model belongs to the technical field of LEDs, in particular to an LED photoelectric curtain.

Background technique

LED has many advantages such as small size, energy saving and environmental protection, long life, rich colors, etc., and is widely used in various fields. Holiday decorative lights made of LED are indispensable decorations for various festivals including Western Christmas. Traditional LED decorative lights generally include LED light strings, LED net lights, and LED curtain lights.

Traditional LED curtain lights are made up of a plurality of in-line LEDs connected in series and parallel through a plurality of wires. Its shape is like a curtain, that is, it includes a main line and a plurality of LED light strings hanging from the main line. The plurality of wires are fixed and cut according to the distance between the LEDs, and then each wire is soldered to the LED.

Most converter equipment has a rectification link, and there are a large number of equipment and devices that require DC power supply. The traditional rectification link widely uses diode-controlled rectification or thyristor phase-controlled rectification, which will inject a large amount of harmonics and reactive power into the grid. The rectifier and filter circuit performs AC/DC conversion, which can realize the sine of the grid side current and ensure the operation of unit power factor, and gradually attracts people's attention.

On the other hand, it is well known that the voltage of a switching power supply decreases with the increase of temperature, and the temperature will drop by 2mV for every 1°C increase in temperature. It is for this reason that in some high-power switching power supplies, the circuit is unstable. , and even burn out the phenomenon of LED diodes.

Utility model content

The purpose of this utility model is to provide an LED photoelectric curtain to solve the problems raised in the above-mentioned background technology.

In order to achieve the above purpose, the utility model provides the following technical solutions: an LED photoelectric curtain, including a step-down transformer, an energy-saving voltage stabilized switching power supply, a switch and an LED photoelectric curtain body, the step-down transformer is connected to an alternating current, and the energy-saving and stable The voltage switching power supply is electrically connected to the energy-saving voltage-stabilizing switching power supply and the switch through wires, and the switch is electrically connected to the LED photoelectric curtain body.

Preferably, the energy-saving regulated switching power supply includes a transformer, a resistor network, a voltage-stabilizing element, a first transistor, a voltage-zener tube, a diode, a second transistor, and a series-connected voltage-stabilizing tube assembly, and the primary electrical connection of the transformer has a drain An inductive energy absorption network, and the secondary of the transformer is electrically connected with a rectifier diode and an output filter capacitor, the first transistor is located above the second transistor, and the first transistor and the second transistor are connected in series, and the resistor network One end is connected to the positive input terminal, and the other end of the resistor network is electrically connected to the series regulator tube assembly, the other end of the series regulator tube component is connected to the input negative terminal, and the connection point between the resistor network and the series regulator tube component passes through The voltage stabilizing element is connected to the gate of the first transistor, the voltage stabilizing element is an inductor or a resistor, and the positive end of the voltage stabilizing transistor is electrically connected to the source of the first transistor.

Preferably, the voltage stabilizing element is an inductor or a resistor.

Preferably, the negative end of the Zener tube is electrically connected to the gate of the first transistor, the positive end of the diode is electrically connected to an external resistor, and the negative end of the diode is electrically connected to the resistor network and the series connection The connection point of the regulator tube assembly, the input end of the external resistor is electrically connected to the step-down side of the step-down transformer.

Preferably, the LED photoelectric curtain body includes at least three LED dewdrop light strips connected in parallel, and the LED dewdrop light strips include a flexible circuit board and a plurality of LEDs welded on the flexible circuit board.

The technical effects and advantages of this utility model: compared with the traditional technology, the main line and branches of this utility model adopt flexible circuit boards to replace the electric wires in the traditional LED curtain lights, without cutting, and the LED adopts patch type LED replaces the traditional in-line LED, which can realize the high-speed automatic patch welding of the LED patch machine, with high production efficiency and low cost; moreover, the increased resistance and voltage stabilizing element designed in the circuit of the utility model have the effect of isolation and separation. Voltage effect and stable voltage and other functions; therefore, the utility model has reasonable design, simple structure, can filter out the harm of harmonics, and can also ensure the stability of the voltage of the switching power supply.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is a schematic diagram of an energy-saving voltage stabilizing switching power supply circuit of the present invention.

In the figure: 1 transformer, 2 leakage inductance energy absorption network, 3 rectifier diode, 4 output filter capacitor, 5 resistor network, 6 voltage stabilizing element, 7 first transistor, 8 voltage stabilizing tube, 9 diode, 10 second transistor, 11 Series regulator tube components, 12 step-down transformers, 13 energy-saving regulated switching power supplies, 14 switches, 15 LED photoelectric curtain body, 16 external resistors.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

The utility model provides a kind of LED photoelectric curtain as shown in Figure 1, comprises step-down transformer 12, energy-saving and voltage-stabilized switching power supply 13, switch 14 and LED photoelectric curtain body 15, and described step-down transformer 12 is connected with alternating current, so The energy-saving voltage-stabilized switching power supply 13 is electrically connected to the energy-saving voltage-regulated switching power supply 13 and the switch 14 respectively through wires, and the switch 14 is electrically connected to the LED photoelectric curtain body 15, and the LED photoelectric curtain body 15 includes at least parallel Three LED dewdrop light bars, the LED dewdrop light bar includes a flexible circuit board and a plurality of LEDs welded on the flexible circuit board.

As shown in Figure 2, the energy-saving regulated switching power supply 13 includes a transformer 1, a resistor network 5, a voltage stabilizing element 6, a first transistor 7, a voltage stabilizing tube 8, a diode 9, a second transistor 10 and a series voltage stabilizing tube assembly 11. The voltage stabilizing element 6 is an inductor or a resistor, the primary of the transformer 1 is electrically connected to a leakage inductance energy absorption network 2, and the secondary of the transformer 1 is electrically connected to a rectifier diode 3 and an output filter capacitor 4 , the first transistor 7 is located above the second transistor 10, and the first transistor 7 and the second transistor 10 are connected in series, one end of the resistor network 5 is connected to the positive input terminal, and the other end of the resistor network 5 is electrically connected in series The voltage regulator tube assembly 11, the other end of the series voltage regulator tube assembly 11 is connected to the input negative terminal, the connection point of the resistor network 5 and the series voltage regulator tube assembly 11 is connected to the gate of the first transistor 7 through the voltage regulator element 6 pole, the voltage stabilizing element 6 is an inductor or a resistor, the positive terminal of the voltage stabilizing tube 8 is electrically connected to the source of the first transistor 7, and the negative terminal of the voltage stabilizing tube 8 is electrically connected to the first transistor 7, the positive terminal of the diode 9 is electrically connected to an external resistor 16, and the negative terminal of the diode 9 is electrically connected to the connection point of the resistor network 5 and the series voltage regulator tube assembly 11, and the external resistor The input end of 16 is electrically connected to the step-down side of the step-down transformer 12 .

Both the main line and the branches of the utility model use flexible circuit boards to replace the wires in the traditional LED curtain lights, without cutting, and the LEDs use patch LEDs to replace traditional in-line LEDs, which can realize high-speed automatic patching of LED patch machines Welding, high production efficiency, low cost; moreover, the increased resistance and voltage stabilizing element 6 designed in the circuit of the utility model have functions such as isolation effect, voltage dividing effect and stable voltage; therefore the utility model is reasonable in design, simple in structure, can While filtering the harm of harmonics, it can also ensure the voltage stability of the switching power supply.

Finally, it should be noted that: the above is only a preferred embodiment of the utility model, and is not intended to limit the utility model, although the utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art , it can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model, All should be included within the protection scope of the present utility model.

Claims (5)

1. A kind of LED photoelectric curtain, comprises step-down transformer (12), energy-saving voltage stabilized switching power supply (13), switch (14) and LED photoelectric curtain body (15), it is characterized in that: described step-down transformer (12) Connected to alternating current, the energy-saving regulated switching power supply (13) is electrically connected to the energy-saving regulated switching power supply (13) and the switch (14) respectively through wires, and the switch (14) is electrically connected to the LED photoelectric curtain body (15) sexual connection. 2. A kind of LED photoelectric curtain according to claim 1, characterized in that: the energy-saving voltage-stabilized switching power supply (13) includes a transformer (1), a resistor network (5), a voltage-stabilizing element (6), a first A transistor (7), a voltage regulator tube (8), a diode (9), a second transistor (10) and a series voltage regulator tube assembly (11), the primary of the transformer (1) is electrically connected to a leakage inductance energy absorption network (2), and the secondary of the transformer (1) is electrically connected with a rectifier diode (3) and an output filter capacitor (4), the first transistor (7) is located above the second transistor (10), and The first transistor (7) and the second transistor (10) are connected in series, one end of the resistor network (5) is connected to the positive input terminal, and the other end of the resistor network (5) is electrically connected to the series regulator tube assembly (11), The other end of the series voltage regulator assembly (11) is connected to the input negative terminal, and the connection point of the resistor network (5) and the series voltage regulator assembly (11) is connected to the first transistor ( 7), the voltage stabilizing element (6) is an inductor or a resistor, and the positive terminal of the voltage stabilizing tube (8) is electrically connected to the source of the first transistor (7). 3. The LED photoelectric curtain according to claim 2, characterized in that: the voltage stabilizing element (6) is an inductor or a resistor. 4. A kind of LED photoelectric curtain according to claim 2, characterized in that: the negative end of the voltage regulator tube 8 is electrically connected to the gate of the first transistor (7), and the positive end of the diode (9) end is electrically connected to an external resistance (16), and the negative end of the diode (9) is electrically connected to the connection point of the resistance network (5) and the series voltage regulator tube assembly (11), and the external resistance (16) The input terminal is electrically connected to the step-down side of the step-down transformer (12). 5. A kind of LED photoelectric curtain according to claim 1, characterized in that: said LED photoelectric curtain body (15) comprises at least three LED dewdrop light strips connected in parallel with each other, and the LED dewdrop light strips include flexible circuit boards, welding A plurality of LEDs on a flexible circuit board.