Flash eliminating device of LED light curtain lamp box lamp

Abstract

The utility model provides a flash eliminating device of an LED light curtain lamp box lamp, and belongs to the technical field of illumination. The LED light curtain lamp box solves the problems that an existing LED light curtain lamp box is prone to failure and inconvenient to maintain. The flash eliminating device of the LED light curtain lamp box lamp comprises a rectifying circuit module and a capacitor module, the positive electrode of the capacitor module is connected with the direct current positive electrode end of the rectifying circuit module, the negative electrode of the capacitor module is connected with the direct current negative electrode end of the rectifying circuit module, and the capacitor module is a high-voltage-resistant capacitor C1. According to the utility model, the commercial power can be rectified into direct current, and then the direct current is connected in series with the whole light curtain lamp box lamp for power supply, so that the abnormal work caused by unstable voltage in the driver due to capacity reduction of the driver capacitor in the lamp box is eliminated, and the direct current voltage generated by the device is more stable; normal work of the LED light bar can still be guaranteed after the capacitor of the driver is lost, and box opening maintenance is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of lighting and relates to a flash extinguisher for an LED light curtain light box lamp. Background Art

[0002] In recent years, with the development of the economy, light curtain light boxes are widely used in office places, and advertising light boxes are widely used outdoors. This type of light box is equipped with multiple groups of LED lights, and various patterns are set on the outside of the light box.

[0003] The traditional light curtain light box lamp circuit diagram is mostly as shown in the manual. Figure 1 and attached Figure 2 As shown, Figure 1 This is the overall structure diagram of the light curtain light box lamp circuit, attached Figure 2 The circuit structure diagram of each LED light bar in the light curtain light box lamp is shown in the figure. That is, multiple groups of LED light bars are set in each light box, and each LED light bar is equipped with a driver. The mains is directly connected to the light curtain light box lamp. The AC power is converted into DC power after passing through the rectification and filtering circuit of each driver. Then the current is adjusted by a high-frequency oscillation circuit or a high-frequency switch to adjust the duty cycle, and then provided to each lamp bead on the LED light bar. After the capacitor C0 in the circuit has been working for a period of time, the constant capacity will decay. When the capacitor C0 decays to a certain extent, the LED lamp bead will not be able to light up normally, and irregular alternation of light and off will occur, which will make people feel uncomfortable and affect the lighting effect of the advertising light box. Since the driver is installed in the light box together with the light bar, the traditional maintenance of the driver requires opening the light box to replace the driver or the lamp tube integrated with the driver. However, the light box is difficult to open. And after opening, the light box will be damaged, and it is difficult to restore the original appearance, resulting in cumbersome maintenance operations and high costs. Summary of the invention

[0004] The purpose of the utility model is to solve the above problems in the existing technology and propose a flash remover for LED light curtain light box lamp, which can avoid opening the light box and operating at the power supply end outside the light box. The technical problem to be solved by the utility model is: how to reduce the maintenance cost of LED light curtain light box lamp.

[0005] The object of the present invention can be achieved through the following technical solutions: A flicker eliminater for an LED light curtain light box lamp, characterized in that it includes a rectifier circuit module and a capacitor module, the positive electrode of the capacitor module is connected to the DC positive terminal of the rectifier circuit module, the negative electrode of the capacitor module is connected to the DC negative terminal of the rectifier circuit module, and the capacitor module includes a capacitor C1, and C1 can also be connected in parallel with capacitors C2, C3, and C4 to form a capacitor group.

[0006] The utility model is connected to the mains power and the circuit input end of the light curtain light box lamp respectively, so that the mains power is first rectified into direct current by the rectifier circuit module, and then the light curtain light box lamp is powered, and the voltage is stabilized by the capacitor module, thereby reducing the load and charging and discharging amount of the driver capacitor C0 of each light bar in the light box, slowing down the loss of the capacitor C0, and delaying its service life. Moreover, the utility model converts AC power supply into DC power supply, replacing the role of the capacitor C0 in the original circuit, and even after the capacitor C0 decays, it can be compensated by the capacitor module, thereby ensuring the normal operation of each LED light bar. Its biggest advantage is that the utility model can be set outside the LED light curtain light box lamp, and even if a fault occurs, the operation of opening the light box is avoided, which is convenient for later maintenance. The capacitor module adopts capacitor C1 and capacitors C2, C3, and C4 in parallel, thereby reducing the failure of the flash elimination function caused by the reduction of the capacity of a single capacitor, and the circuit operation is more stable and reliable, reducing the failure rate.

[0007] In the above-mentioned LED light curtain light box lamp flash extinguisher, the capacitor circuit of the capacitor module is provided with a negative temperature coefficient thermistor. The negative temperature coefficient thermistor can reduce the impact of the instantaneous surge current when power is turned on, and further protect the capacitor module and the bridge rectifier circuit.

[0008] In the above-mentioned LED light curtain light box lamp flicker extinguisher, the capacitors C1, C2, C3, and C4 are high-voltage electrolytic capacitors, and their capacitance values ​​may be different.

[0009] In the above-mentioned flash extinguisher of the LED light curtain light box lamp, the rectifier circuit module is a bridge rectifier circuit.

[0010] In the above-mentioned flash extinguisher of the LED light curtain light box lamp, a fuse is also provided at the live wire end of the rectifier circuit module.

[0011] Compared with the prior art, the utility model has the following advantages:

[0012] 1. The utility model can first rectify the mains into direct current and then supply power to the light curtain light box lamp, thereby reducing the load of each driver capacitor in the light box, slowing down the loss of the capacitor, and prolonging the service life. The capacitor module in the utility model can be connected in parallel with the capacitor in the light box, and can ensure the normal operation of each lamp bead in the light box after the capacitance value of the capacitor C0 decays, avoiding unpacking and maintenance.

[0013] 2. The capacitor module of the utility model adopts a parallel connection structure of multiple capacitors, which not only improves the withstand voltage, but also increases the capacitance, making the capacitor less prone to damage and working more stable and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the existing light curtain light box lamp circuit;

[0015] Figure 2 yes Figure 1 Schematic diagram of the circuit principle of each LED light bar and driver;

[0016] Figure 3 It is a schematic diagram of the circuit principle of the utility model;

[0017] Figure 4 1 is a schematic diagram of the circuit principle of the second embodiment;

[0018] Figure 5 Schematic diagram of the circuit principle of the third embodiment.

[0019] In the figure, 1. LED light strip; 2. Rectifier circuit module; 3. Capacitor module. DETAILED DESCRIPTION

[0020] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0021] Embodiment 1

[0022] like Figure 3 As shown, the utility model includes a rectifier circuit module 2 and a capacitor module 3, wherein the rectifier circuit module 2 adopts a bridge rectifier circuit, the positive electrode of the capacitor module 3 is connected to the DC positive terminal of the rectifier circuit module 2, and the negative electrode of the capacitor module 3 is connected to the DC negative terminal of the rectifier circuit module 2. When in use, the AC input terminal of the rectifier circuit module 2 is used to connect to the mains, and the DC output terminal is used to connect to the LED light curtain light box lamp, so that the mains is rectified and then supplied to the drivers of each light strip in the LED light curtain light box lamp, thereby making the internal power supply voltage of each driver more stable. Even if the internal C0 of the LED driver is reduced in capacity, its high-frequency oscillation circuit can still maintain normal operation.

[0023] Embodiment 2

[0024] like Figure 4 As shown, the technical solution of this embodiment is basically the same as that of the first embodiment, except that, in this embodiment, the capacitor module 3 is composed of multiple capacitors, including capacitor C1, capacitor C2, capacitor C3 and capacitor C4, and all four capacitors are connected in parallel to form a capacitor group. In this embodiment, capacitor C1, capacitor C2, capacitor C3 and capacitor C4 all use high withstand voltage capacitors with the same withstand voltage, and their capacitance values ​​may need to be adjusted so that the capacitance values ​​of the four capacitors are the same or different, and the capacitance values ​​of the capacitors C1, capacitor C2, capacitor C3 and capacitor C4 are the same or different according to the load conditions. Thereby, the overall capacitance value of the capacitor module 3 is improved and the reliability is increased.

[0025] Embodiment 3

[0026] like Figure 5As shown, the technical solution of this embodiment is basically the same as that of the second embodiment, except that, in this embodiment, a negative temperature coefficient thermistor is provided between the positive electrode of the capacitor module 3 and the DC positive electrode of the rectifier circuit module 2, and each capacitor is connected in series with a negative temperature coefficient thermistor, which solves the impact of surge current on the circuit at the moment of power-on and effectively protects the rectifier module and the capacitor module.

[0027] In addition, when a capacitor breaks down, the current of the negative temperature coefficient thermistor exceeds the allowable current value of the resistor, the resistor will burn out, thereby cutting off the current flowing through the broken capacitor, and the flash extinguisher can still work normally. This technical solution is also a redundant solution to improve reliability.

[0028] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0029] Although the terms such as rectifier circuit module 2 and capacitor module 3 are used more frequently in this article, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A flash extinguisher for an LED light curtain light box lamp, characterized in that: It comprises a rectifier circuit module (2) and a capacitor module (3), wherein the positive electrode of the capacitor module (3) is connected to the DC positive terminal of the rectifier circuit module (2), and the negative electrode of the capacitor module (3) is connected to the DC negative terminal of the rectifier circuit module (2); the capacitor module (3) comprises a capacitor C1, and the capacitor C1 is a high-voltage withstand capacitor.

2. The flash extinguisher of the LED light curtain light box lamp according to claim 1, characterized in that: The capacitor module (3) is a capacitor C2, a capacitor C3, a capacitor C4 connected in parallel with C1 to form a capacitor group.

3. The flash extinguisher of the LED light curtain light box lamp according to claim 2, characterized in that: A negative temperature coefficient thermistor is provided between the positive electrode of the capacitor module (3) and the DC positive electrode of the rectifier circuit module (2).

4. The flash extinguisher of the LED light curtain light box lamp according to claim 3, characterized in that: The withstand voltages of the capacitors C1 , C2 , C3 and C4 are the same, and the capacitances of the capacitors C1 , C2 , C3 and C4 are the same or different depending on the load conditions.

5. The flash extinguisher of the LED light curtain light box lamp according to claim 2, characterized in that: Each of the capacitors C1 , C2 , C3 and C4 is connected in series with a negative temperature coefficient thermistor.

6. The flash extinguisher of the LED light curtain light box lamp according to claim 1, 2 or 3, characterized in that: The rectifier circuit module (2) is a bridge rectifier circuit.

7. The flash extinguisher of the LED light curtain light box lamp according to claim 1, 2 or 3, characterized in that: The live wire end of the rectifier circuit module (2) is also provided with a fuse.

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