WO2012048450A1

WO2012048450A1 - Circuit of replaceable led daylight lamp tube

Info

Publication number: WO2012048450A1
Application number: PCT/CN2010/001652
Authority: WO
Inventors: 顾强; 张健伟
Original assignee: Gu Qiang; Zhang Jianwei
Priority date: 2010-10-14
Filing date: 2010-10-21
Publication date: 2012-04-19
Also published as: CN201854467U

Abstract

The present invention discloses a circuit of a replaceable LED daylight lamp tube. A LED light source is arranged on a circuit board. The circuit further includes a full wave rectification circuit and a protection circuit for protecting the circuit of the lamp tube. The protection circuit is one or a combination of two or three of an anti-shock protection circuit, an electronic ballast protection circuit and a current limiting circuit of a LED lamp tube. The present invention directly replaces the traditional electronic ballast daylight lamp, and thus enables easy replacement, lower cost, and safe operation.

Description

Replacement LED fluorescent tube circuit

The utility model relates to a circuit, in particular to a replacement LED fluorescent tube circuit. Background technique

Compared with the fluorescence on the market today, in addition to long life, high luminous efficiency and low energy consumption, LED lamps have three advantages: the application is very flexible and can be made into various forms of points, lines and surfaces. Light and short products; Second, better environmental protection, because there is no ultraviolet and infrared rays in the spectrum, neither heat nor radiation, it is a typical green lighting source, and the waste can be recycled without pollution; Third, the control is extremely convenient. As long as the current is adjusted, the dimming can be arbitrarily adjusted, and the combination of different light colors can be varied. With the timing control circuit, a variety of dynamic changes can be achieved.

In view of the many advantages of LED lamps, more and more manufacturers are working to replace LED lamps with traditional fluorescent lamps. Although there are LED lamps on the market that can replace traditional fluorescent lamps, the replacements are as follows. One problem: Since the traditional fluorescent lamps mostly use electronic ballasts to start the fluorescent lamps, it is necessary to replace the original electronic ballasts with the existing LED lamps in the prior art, or use a dedicated LED power supply. This change is very large, and only professional technicians are likely to operate smoothly. Non-professional operations have certain security risks, and the cost of replacement is high, and it is not suitable for consumers. To a certain extent, it has prevented the promotion and development of LED lights, which is not conducive to the popularization of low-carbon, energy-saving and environmental protection. Utility model content

The utility model provides a replacement LED fluorescent tube circuit with low cost, convenient replacement, simple operation and no safety hazard for the technical problems existing in the prior art, and the circuit adopts the circuit. LED fluorescent tubes can be mounted directly on conventional fluorescent lamps with electronic ballasts without any modifications.

In order to solve the above technical problem, the technical solution of the present invention is as follows: a replacement LED fluorescent tube circuit, which is provided with an LED light source on a circuit board, the circuit further comprising a full-wave rectification circuit, and protection for the protection of the lamp circuit Circuit.

As an improvement of the present invention, the circuit is provided with a faux filament resistor to accommodate the requirements of a particular electronic ballast.

As an improvement of the present invention, the full-wave rectification circuit is composed of four diodes, one set of two diodes are connected in anti-parallel between the LED light sources, and the full-wave rectification circuit is used to drive the LED lamps.

As an improvement of the utility model, the protection circuit is a set of two or three or three groups of anti-shock protection circuit, electronic ballast protection circuit, LED lamp current limiting circuit, in order to achieve better The protection effect is a combination of three sets of circuits, namely an anti-shock protection circuit, an electronic ballast protection circuit and an LED lamp current limiting circuit connected in series.

As an improvement of the present invention, the anti-shock protection circuit and the electronic ballast protection circuit are respectively connected in series with the full-wave rectification circuit. The anti-shock protection circuit is composed of a thyristor and a capacitor. When one end of the LED fluorescent tube is inserted into the fluorescent lamp holder, only one end is connected to the electronic ballast, and the other end is not inserted in the lamp holder, and may be held in the hand. On the top, the thyristor is not conducting, the LED fluorescent tube is not lit, no current is passed, and there is no safety hazard.

The electronic ballast protection circuit is composed of a fuse. When the LED lights on the circuit board are all burnt out, since the two pins on the fluorescent tube plug are connected through the resistor, the high voltage trigger circuit of the electronic ballast generates high voltage. At the same time, the electronic ballast circuit current is greater than the current during normal operation, so that the fuse is blown, the output of the electronic ballast is opened, and the electronic ballast is protected from damage.

As an improvement of the utility model, the LED lamp current limiting circuit is a current limiting component of the inductor The circuit is connected in series with the anti-shock protection circuit. The function of the inductor is to adjust the current through the LED tube. By adjusting, the current can be controlled within the allowable range to prevent the LED tube from being burned out.

As an improvement of the utility model, the imitation filament resistance is composed of two resistors, and the resistors are respectively connected between the plugs on both sides of the LED tube. The resistor is mainly used to simulate the filaments at the two ends of the ordinary fluorescent tube, and meets the special requirements. The need for functional electronic ballasts.

Compared with the prior art, the utility model has the following advantages: (1), simple replacement, and no need of professional technicians, the general consumer only needs to directly install the LED fluorescent tube in the traditional fluorescent lamp with electronic ballast. On the tube, it is as simple as changing a normal light bulb, no need to make any changes to the original light source and the electronic ballast; (2), lower cost, compared to the prior art to remove the ballast, or replace the LED The power supply saves a lot of cost and is convenient for the general consumer; (3), operation safety, the replacement of the LED fluorescent tube in the prior art requires professional technicians, otherwise it is prone to safety hazards such as electric shock. DRAWINGS

Figure 1 is a schematic view of the connection of the whole of the utility model;

Figure 2 is a schematic diagram of the utility model;

In the figure: 1-plug pin, 2-resistor, 3-inductor, 4, capacitor, 5-thyristor,

6-diode, 7-LED lamp, 8-fuse. detailed description

The present invention will be further described below in conjunction with FIG. 1 to 2;

The principle of the utility model is shown in FIG. 2, an LED light source is placed on the FR4 circuit board, and two sets of high-power LED lights are connected in parallel to form an illuminant, and each group of LED lights 7 is connected in series according to different powers. The neon light, the number of LED lights in each group is different. A full-wave rectification circuit for driving the LED lamp is connected at both ends of the LED light source. The rectification circuit is composed of four diodes, and each of the two diodes is connected in reverse parallel to the LED. Between the light sources, the alternating current is converted into direct current through the LED lamp through a rectifying circuit; an anti-shock protection circuit and an electronic ballast protection circuit are respectively connected at both ends of the full-wave rectifying circuit, wherein the anti-shock protection circuit is controlled by the thyristor 5 It is composed of a capacitor 4, and its protection function is embodied when one end of the LED fluorescent tube is inserted into the fluorescent lamp holder, only one end is connected to the electronic ballast, and the other end is not inserted in the lamp holder, and may be held in the hand, The silicon control tube is not conductive, the LED fluorescent tube is not bright, no current is passed, no accidental electric shock is caused, and the safety hazard problem is eliminated. The electronic ballast protection circuit is composed of a fuse 8, and its protection function is reflected in that when the LED lamps on the circuit board are all burned out, since the two plug pins 1 on the fluorescent tube plug are connected by the imitation filament resistor, The high voltage trigger circuit of the electronic ballast generates a high voltage, and the current of the electronic ballast circuit is greater than the current during normal operation, so that the fuse 8 is blown, and the output of the electronic ballast is opened, thereby protecting the electronic ballast. It is damaged; one end of the thyristor 5 is connected to an LED lamp current limiting circuit composed of an inductor 3, and the function of the inductor is to adjust the current through the LED tube, and by limiting the magnitude of the current, the current can be limited to the allowable range. In order to prevent different types of electronic ballasts from being burnt out, in order to adapt to different types of electronic ballasts, resistors 2 are respectively connected between two plugging pins 1 on both ends of the circuit board, that is, plugs on both sides of the lamp tube, and the resistor constitutes The anti-filament resistor, the main function is to simulate the filament at both ends of the ordinary fluorescent tube, to meet the needs of special function electronic ballast, such as programmable preheating electronic ballast Need for the device.

Example 1:

A specific application of the LED fluorescent tube circuit of the utility model is a T5 LED fluorescent lamp, which is connected in parallel with two sets of 0.5W LED lamps, each of which can pass a current of up to 150 mA, and the two groups can pass a current of 300 mA, for the electronic ballast of the T5 LED fluorescent lamp. Said to be safe and reliable.

Example 2: Another specific application of the LED fluorescent tube circuit of the utility model is a T5 LED fluorescent lamp, which is connected in parallel with ten sets of 0.1W LED lights, each group can pass current up to 20mA, the two groups can pass 200mA current, for T5LED fluorescent electronic ballasts It is safe and reliable.

It should be noted that the above embodiments are merely preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. The scope of protection of the present invention should be described in the claims of the present patent.

Claims

Rights request

A replacement LED fluorescent tube circuit, wherein an LED light source is disposed on the circuit board, wherein: the circuit further comprises a full-wave rectifying circuit, and a protection circuit for protecting the lamp circuit.

2 . The replacement LED fluorescent tube circuit according to claim 1 , wherein: the protection circuit is a group or two of an anti-shock protection circuit, an electronic ballast protection circuit, and an LED lamp current limiting circuit. Group or combination of three groups.

3. The replacement LED fluorescent tube circuit according to claim 2, wherein the LED fluorescent tube circuit is further provided with a faux filament resistor.

4. The replacement LED fluorescent tube circuit according to claim 2 or 3, wherein: the full-wave rectifying circuit is composed of four diodes (6), and each of the two diodes is connected in reverse parallel to the LED. Between the light sources.

5. The replacement LED fluorescent tube circuit according to claim 2 or 3, wherein: the protection against electric shock is composed of a thyristor (5) and a capacitor (4), and the electronic ballast protection circuit is The fuse (8) is composed of an LED lamp current limiting circuit composed of an inductor (3).

The LED fluorescent tube circuit according to claim 2 or 3, wherein the anti-shock protection circuit is connected in series with the electronic ballast protection circuit and the full-wave rectification circuit.

The replacement LED fluorescent tube circuit according to claim 6, wherein: the imitation filament resistance is composed of two resistors (2), and the resistors (2) are respectively connected to the plugs on both sides of the LED tube.

Between (1).

8. The replacement LED fluorescent tube circuit according to claim 4, wherein: the protection against electric shock is composed of a thyristor (5) and a capacitor (4), and the electronic ballast protection circuit is provided by a fuse ( 8) Composition, LED tube current limiting circuit is composed of inductor (3).

9. The replacement LED fluorescent tube circuit according to claim 8, wherein: said imitation The filament resistance consists of two resistors (2), which are connected between the plugs (1) on both sides of the LED tube.