CN202958027U

CN202958027U - Light-emitting diode (LED) lighting circuit

Info

Publication number: CN202958027U
Application number: CN 201220630006
Authority: CN
Inventors: 李成春; 谢昔华
Original assignee: SHENZHEN SPRINGCITY LED CO Ltd
Current assignee: SHENZHEN SPRINGCITY LED CO Ltd
Priority date: 2012-11-26
Filing date: 2012-11-26
Publication date: 2013-05-29
Anticipated expiration: 2022-11-26

Abstract

The utility model discloses a light-emitting diode (LED) lighting circuit. The circuit comprises an LED lamp string, a pin accessing circuit, a filtering circuit and a high-frequency processing circuit, wherein the filtering circuit is connected between the LED lamp string and the pin accessing circuit in parallel and used for converting the filtering circuit to direct current, the high-frequency processing circuit is used for limiting the current, the high-frequency processing circuit and the filtering circuit are bridge type rectifying filtering circuits, diodes (D1, D2, D3 and D4) are used for high-frequency rectification, and capacitors (C1 and C2) are used for filtering. The circuit is simple in structure, small in volume and capable of being matched with an electronic ballast support in the market and saving the cost and the energy.

Description

The LED lighting circuit

Technical field

The utility model relates to the LED lighting circuit, relates in particular to a kind of LED lighting circuit of complete compatible electronic ballast for fluoresent lamp.

Background technology

Along with the progress of technology, the LED illuminating lamp has obtained unprecedented development, and LED is described as the century new light sources.But in actual applications, direct mounted LED lamp pipe on the Fluorescent Light and Fixtures of traditional electrical minor ballast, the constant-current driving power supply of existing employing PWM mode can only be arranged on T8 caliber fluorescent tube, simultaneously, existence is not more or less lit a lamp and the problem such as stroboscopic, to such an extent as to the LED fluorescent tube can not large-scale popularization be applied on conventional fluorescent (the especially T5 fluorescent lamp) support of tube with electronic ballast.And existing technical solution also causes the cost of LED high.Directly limited its applying on the support of existing electric ballast.

The utility model content

The purpose of this utility model is to solve the problem that above-mentioned prior art exists, and proposes a kind of LED lighting circuit, by the direct compatible circuit of fluorescent lamp electronic ballast of LED driving power, need not change original circuit theory and mounting structure and directly use on original support.

The purpose of this utility model is to solve the problem that above-mentioned prior art exists; a kind of LED lighting circuit is proposed; comprise: LED lamp string light emitting module, high-frequency rectification and filter circuit and lamp tube protective circuit; two inputs of described high-frequency rectification and filter circuit connect respectively the input (TP1 and TP3) of power supply, and two outputs connect respectively the two ends of described LED lamp string light emitting module.

Described high-frequency rectification and filter circuit adopt bridge rectifier filter circuit, and wherein diode (D1 and D2, D3 and D4) is for high-frequency rectification, and electric capacity (C1 and C2) is for filtering.

Described lamp tube protective circuit adopts fuse.

Described LED lamp string light emitting module adopts LED lamp group in parallel.

Described LED lamp group a plurality of LED lamps of connecting.

The utility model circuit structure is simple, volume is very little, effectively solving element directly packs in the lamp body two ends lamp holder of T5 caliber, reduced the device cost problem, can be on electric ballast direct lightening LED lamp pipe, efficiently solve the disadvantage that electric ballast can not be used the LED fluorescent tube, and material cost and production cost have been reduced greatly, circuit conversion efficiency is high, that original fluorescent tube is consumed half of electric power, the LED fluorescent tube light output brightness of applying out is the same with original fluorescent lamp, and light is soft, not stroboscopic.

The accompanying drawing explanation

With embodiment, the utility model is described in detail with reference to the accompanying drawings, wherein:

Fig. 1 is circuit theory diagrams of the present utility model;

Fig. 2 is the circuit diagram of the utility model one embodiment.

Embodiment

The principle of the LED lighting circuit that as shown in Figure 1, an embodiment of the present utility model proposes is for to be connected LED lamp string by G13 with G5 stitch place in circuit, no-load protective circuit, high frequency treatment circuit with filter circuit.The number of elements of four circuit outside LED lamp string is less, volume is also very little, in the lamp body two ends lamp holder of the T5 caliber of can directly packing into, has reduced the device cost problem, compatible on electric ballast direct lightening LED lamp pipe array, reach purpose of design of the present utility model.

As shown in Figure 2, in the LED lighting circuit, in parallel the filter circuit that filter circuit is transferred to direct current between LED lamp string and stitch place in circuit, high frequency treatment circuit for current limliting, and no-load protective circuit, two inputs of high-frequency rectification and filter circuit connect respectively the input (TP1 and TP3) of power supply, two outputs connect respectively the two ends of described LED lamp string light emitting module, high-frequency rectification and filter circuit adopt bridge rectifier filter circuit, by end to end two diodes and an electric capacity, formed, no-load protective circuit consists of a fuse, 8 components and parts altogether, not only the conversion efficiency of light is higher, and small product size is less, can contain existing ballast support on the market.LED lamp string first adopts the mode of series connection, and then 10-60 the LED lamp of connecting carry out the parallel connection of LED lamp group on this basis again, can 2-40 in parallel LED lamp group, meet the carriage requirement of general LED fluorescent tube.

Above specific embodiment is only in order to illustrate structure of the present utility model, and those of ordinary skill in the art can make various deformation and variation under design of the present utility model, and these distortion and variation include within protection range of the present utility model.

Claims

1. a LED lighting circuit; it is characterized in that comprising: LED lamp string light emitting module, high-frequency rectification and filter circuit and lamp tube protective circuit; two inputs of described high-frequency rectification and filter circuit connect respectively the input (TP1 and TP3) of power supply, and two outputs connect respectively the two ends of described LED lamp string light emitting module.

2. LED lighting circuit as claimed in claim 1 is characterized in that: described high-frequency rectification and filter circuit adopt bridge rectifier filter circuit, and wherein diode (D1 and D2, D3 and D4) is for high-frequency rectification, and electric capacity (C1 and C2) is for filtering.

3. LED lighting circuit as claimed in claim 1, is characterized in that: described lamp tube protective circuit employing fuse.

4. LED lighting circuit as claimed in claim 1, it is characterized in that: described LED lamp string light emitting module adopts LED lamp group in parallel.

5. LED lighting circuit as claimed in claim 4 is characterized in that: described LED lamp group a plurality of LED lamps of connecting.