CN203814004U - LED light tube - Google Patents

Abstract

The utility model discloses a LED fluorescent tube, it includes: a first lamp filament analog circuit connected in parallel to the two first pins at the first end; a second lamp filament analog circuit connected in parallel to the two second pins at the second end; the input end of the first full-wave rectifying circuit is connected to the first lamp filament simulation circuit in parallel; the input end of the second full-wave rectifying circuit is connected to the second lamp filament simulation circuit in parallel; and an LED light emitting group connected between the first full-wave rectification circuit and the second full-wave rectification circuit. According to the utility model discloses a LED fluorescent tube can direct replacement fluorescent tube and need not to change lamps and lanterns, still has following advantage in addition, can adapt to more brands at the electronic ballast of EB and HF, HO classification, and it is higher to make up the requirement to LED, is fit for using the lamps and lanterns of HF classification and EB, HO combination classification electronic ballast, the electronic ballast of the multiple power combination of adaptation Europe very much.

Description

LED light tube

technical field

The utility model relates to an LED lamp tube.

Background technique

Due to its small size, high brightness, low heat, low power consumption, environmental protection and other advantages, LEDs have developed rapidly and are applied to various lighting products, such as fluorescent tubes. However, in the process of replacing the current fluorescent tube with the LED tube, there will be a compatibility problem with the electrical parameters of the existing fluorescent tube, especially the electrical parameters of the ballast.

There are many types of T5 electronic ballasts, such as 14~35W, 14~21W and 28+54W (HO) types and so on. Therefore, how to provide an LED lamp tube that can be widely adapted to various T5 electronic ballasts is an urgent problem to be solved.

Utility model content

In order to solve the above problems, the utility model provides an LED lamp tube, which includes: a first lamp filament simulation circuit connected in parallel to the two first pins at the first end; A second lamp filament simulation circuit whose second end is connected in parallel to the two second pins; a first full-wave rectification circuit whose input terminal is connected in parallel to the first lamp filament simulation circuit; a second full-wave rectification circuit , the input end of which is connected in parallel to the second lamp filament simulation circuit; and the LED lighting group connected between the first full-wave rectification circuit and the second full-wave rectification circuit.

Preferably, each of the first lamp filament simulation circuit and the second lamp filament simulation circuit includes a capacitor and a negative temperature coefficient resistor connected in parallel.

Preferably, each of the first full-wave rectification circuit and the second full-wave rectification circuit is a bridge rectification circuit including four diodes.

Preferably, the LED light-emitting group includes a plurality of light-emitting diodes.

Preferably, the LED light-emitting group includes a plurality of light-emitting diodes and a capacitor connected in parallel with the plurality of light-emitting diodes.

Preferably, the LED light tube is a fluorescent light tube.

The LED lamp tube according to the present invention can directly replace the fluorescent lamp tube without modifying the lamp, and also has the following advantages, the electronic ballasts in EB, HF, and HO categories can adapt to more brands, and have higher requirements for LED combinations , suitable for lamps using HF category and EB, HO combined category electronic ballasts, especially suitable for electronic ballasts with various power combinations in Europe.

A series of concepts in simplified form are introduced in the content of the utility model, which will be further explained in detail in the specific embodiment section. The content of the utility model does not mean trying to limit the key features and essential technical features of the claimed technical solution, nor does it mean trying to determine the protection scope of the claimed technical solution.

The advantages and features of the present utility model will be described in detail below in conjunction with the accompanying drawings.

Description of drawings

The following drawings of the utility model are used as a part of the utility model for understanding the utility model. The implementation of the utility model and its description are shown in the accompanying drawings, which are used to explain the principle of the utility model. In the attached picture,

Fig. 1 is a circuit diagram of an LED lamp according to an embodiment of the present invention.

Detailed ways

In the following description, numerous specific details are given in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without one or more of these details. In other examples, in order to avoid confusion with the present invention, some technical features known in the art are not described.

For a thorough understanding of the present invention, the detailed structure will be presented in the following description. Obviously, the embodiments of the invention are not limited to specific details familiar to those skilled in the art. The preferred embodiments of the utility model are described in detail as follows, but in addition to these detailed descriptions, the utility model can also have other implementations.

The utility model provides an LED lamp tube. The LED light tube is mainly used as a fluorescent light tube.

As shown in Figure 1, the LED lamp tube includes two first pins 10A and two second pins 10B, a first lamp filament simulation circuit 20A and a second lamp filament simulation circuit 20B, a first full-wave rectifier The circuit 30A, the second full-wave rectification circuit 30B, and the LED lighting group 40 .

The first pin 10A and the second pin 10B are respectively located at the first end and the second end of the LED lamp tube. The first pin 10A and the second pin 10B are generally metal pins, and they protrude from the housing of the LED light tube at the first end and the second end respectively, for connecting with the power terminal of the lamp holder.

The first lamp filament simulation circuit 20A is connected in parallel to the two first pins 10A at the first end. The second lamp filament simulation circuit 20B is connected in parallel to the two second pins 10B at the second end. The first lamp filament simulation circuit 30A includes a parallel capacitor C1 and a negative temperature coefficient resistor NTC, and the second lamp filament simulation circuit 30B includes a parallel capacitor C1 and a negative temperature coefficient resistor NTC. The negative temperature coefficient resistor NTC is mainly used to provide guarantee information to the electronic ballast, so as to inform the electronic ballast that the external lamp tube is intact.

The first full-wave rectification circuit 30A is coupled to the first lamp filament simulation circuit 20A at a first end. The second full-wave rectification circuit 30B is coupled to the second lamp filament simulation circuit 20B at a second end. Specifically, the input terminal of the first full-wave rectification circuit 30A is connected in parallel to the first lamp filament simulation circuit 20A, and the input terminal of the second full-wave rectification circuit 30B is connected in parallel to the second lamp filament simulation circuit 20B. In one embodiment, the first full-wave rectification circuit 30A includes a four-diode bridge rectification circuit TBS1, and the second full-wave rectification circuit 30B includes a four-diode bridge rectification circuit TBS2. The first full-wave rectification circuit 30A and the second full-wave rectification circuit 30B are used to convert the alternating current into a single-directional current.

The LED lighting group 40 is connected in parallel between the first full-wave rectification circuit and the second full-wave rectification circuit. Specifically, the LED lighting group 40 is coupled between the output terminal of the first full-wave rectification circuit 30A and the output terminal of the second full-wave rectification circuit 30B to provide rectified unidirectional current to the LED lighting group 40 . The LED lighting group 40 includes a plurality of light emitting diodes. The number of light emitting diodes can be selected according to actual needs. In one embodiment, multiple light emitting diodes may be connected in series. In another embodiment, multiple light emitting diodes may be connected in parallel. In yet another embodiment, multiple light emitting diodes may be connected in series and then in parallel. In a preferred embodiment, the LED light-emitting group 40 may include a plurality of light-emitting diodes and a capacitor C2 connected in parallel with the plurality of light-emitting diodes. The capacitor C2 can make the working current of the LED more stable.

The LED lamp tube according to the present invention can directly replace the fluorescent lamp tube without modifying the lamp, and also has the following advantages, the electronic ballasts in EB, HF, and HO categories can adapt to more brands, and have higher requirements for LED combinations , suitable for lamps using HF category and EB, HO combined category electronic ballasts, especially suitable for electronic ballasts with various power combinations in Europe.

The utility model has been described through the above embodiments, but it should be understood that the above embodiments are only for the purpose of illustration and description, and are not intended to limit the utility model to the scope of the described embodiments. In addition, those skilled in the art can understand that the utility model is not limited to the above-mentioned embodiments, and more variations and modifications can be made according to the teaching of the utility model, and these variations and modifications all fall within the scope of the utility model. within the scope of protection. The protection scope of the utility model is defined by the appended claims and their equivalent scope.

Claims (6)

1. A kind of LED lamp tube, it is characterized in that, described LED lamp tube comprises: two first pins at the first end; two second pins at the second end; a first lamp filament simulation circuit connected in parallel to the two first pins at the first end; a second lamp filament simulation circuit connected in parallel to the two second pins at the second end; A first full-wave rectification circuit, the input end of which is connected in parallel to the first lamp filament simulation circuit; A second full-wave rectification circuit, the input end of which is connected in parallel to the second lamp filament simulation circuit; and An LED lighting group connected between the first full-wave rectification circuit and the second full-wave rectification circuit. 2. The LED light tube according to claim 1, wherein each of the first lamp filament simulation circuit and the second lamp filament simulation circuit comprises a parallel capacitor and a negative temperature coefficient resistor device. 3. The LED light tube according to claim 1, wherein each of the first full-wave rectification circuit and the second full-wave rectification circuit is a bridge rectification circuit comprising four diodes. 4. The LED lamp tube according to claim 1, wherein the LED lighting group comprises a plurality of light emitting diodes. 5 . The LED lamp tube according to claim 1 , wherein the LED light-emitting group comprises a plurality of light-emitting diodes and a capacitor connected in parallel with the plurality of light-emitting diodes. 6. The LED light tube according to claim 1, wherein the LED light tube is a fluorescent light tube.