CN201754641U

CN201754641U - Driving circuit device for LED lamp tube

Info

Publication number: CN201754641U
Application number: CN2010202683325U
Authority: CN
Inventors: 刘则锋
Original assignee: HANGZHOU TAIYINGNUO TECHNOLOGY Co Ltd
Current assignee: HANGZHOU TAIYINGNUO TECHNOLOGY Co Ltd
Priority date: 2010-07-20
Filing date: 2010-07-20
Publication date: 2011-03-02
Anticipated expiration: 2020-07-20

Abstract

The utility model provides a driving circuit device for an LED lamp tube, which comprises a high-frequency magnetic core isolation transformer, a rectifying bridge connected at the output end of the isolation transformer in parallel, and a high-frequency capacitor connected at the output end of the rectifying bridge in parallel. The output end of the rectifying bridge is connected with positive and negative poles of the high-frequency capacitor and an LED lamp string in parallel, and one input end of the high-frequency magnetic core isolation transformer is connected with a dual-head contact pin of a daylight lamp tube; another high-frequency capacitor and a low-frequency rectifying bridge connected with the high-frequency capacitor in parallel are connected at the input end of the high-frequency magnetic core isolation transformer in series; the output ends of the rectifying bridge and the low-frequency rectifying bridge are connected with the positive and negative poles of the high-frequency capacitor and the LED lamp string in parallel at the same time, and the dual-head contact pin of the daylight lamp tube is respectively connected with one input end of the high-frequency magnetic core isolation transformer and one input end of the another high-frequency capacitor. With the characteristics of simple structure, low cost, high converting efficiency, stable performance and high safety, the driving circuit device can be used for a high-frequency electronic ballast or a lower-frequency inductance rectifier lamp rack, and can be directly installed in a global commercial power network.

Description

The driving circuit device of LED fluorescent tube

Technical field

The utility model relates to a kind of LED lamp tube drive circuit device that adapts to common fluorescent tube installation environment fully, belong to the LED lighting technical field.

Background technology

Existing illuminating LED lamp tube drive circuit, all adopt the electronics constant-current circuit of some standards to come driving LED lamp string, the characteristics of its maximum are: can only use tens input voltages to the a-c cycle of hundreds of hertz, so being doomed existing LED lamp tube drive circuit can only be applied in direct access civil power and have these two kinds of applied environments of common fluorescence daylight lamp bracket of low frequency inductance type ballast, and substitute in the process of conventional fluorescent fluorescent tube at the LED illuminating product, cause those users that using high frequency fluorescence fluorescent lamp can't directly use the LED illuminating product, because they must remove original electric ballast and connect wires again, this has hit the progress that the LED illuminating product is promoted to domestic consumer greatly, simultaneously because also increase greatly of the various potential safety hazards that transformation process brings, in addition, owing to use the conventional fluorescent lamps user of high-frequency electrical minor ballast more, apply so existing LED lamp tube drive circuit has greatly limited the actual of novel environment friendly illuminating product than the user of the conventional fluorescent lamps of using the low frequency Inductive ballast.

The utility model content

The purpose of this utility model is to overcome the deficiency that prior art exists, and provide a kind of installation environment of the existing conventional fluorescent lamps pipe of the convenient safe handling of user that can allow that the LED fluorescent tube is installed, can further enlarge the driving circuit device that the LED illuminating product substitutes the LED fluorescent tube of traditional lighting product comprehensively.

The purpose of this utility model is finished by following technical solution, described driving circuit device, and it includes a high frequency magnetic core isolating transformer, is parallel to the rectifier bridge of isolating transformer output, is parallel to the high frequency capacitance of rectification bridge output end; The output of described rectifier bridge is parallel to the both positive and negative polarity of high frequency capacitance and LED lamp string; An input of described high frequency magnetic core isolating transformer connects two contact pin of fluorescent tube.

The low frequency rectifier bridge that described high frequency magnetic core isolating transformer input is in series with another high frequency capacitance and is parallel to this high frequency capacitance; The output of the output of described rectifier bridge and low frequency rectifier bridge is parallel to the both positive and negative polarity of high frequency capacitance and LED lamp string simultaneously; An input of described high frequency magnetic core isolating transformer and an input of another high frequency capacitance are connected two contact pin of fluorescent tube respectively.

Described fluorescent tube contact pin comprises the contact pin that is electrically connected at traditional fluorescent lamp pipe two; Described led drive circuit device is made into the shape and size the same with common fluorescent tube together with LED lamp string.

Described rectifier bridge is connected into half-bridge or is connected into full-bridge; Reinstall the constant-current circuit of a wide voltage input between described low frequency rectifier bridge and the LED lamp string.

The utility model compared with prior art has simple in structurely, and cost is low, the conversion efficiency height, and stable performance, safe, compatibility is used in high-frequency electronic ballast or low frequency inductance rectifier lamp bracket and directly is installed on characteristics such as global electricity network.

Description of drawings

Fig. 1 is a basic principle schematic of the present utility model.

Fig. 2 is an expanded function principle schematic of the present utility model.

Embodiment

Below in conjunction with accompanying drawing the utility model is described in detail: shown in Figure 1, the utility model mainly includes a high frequency magnetic core isolating transformer 1, is parallel to the rectifier bridge 2 of isolating transformer 1 output, is parallel to the high frequency capacitance 3 of rectifier bridge 2 outputs; The output of described rectifier bridge 2 is parallel to the both positive and negative polarity of high frequency capacitance 3 and LED lamp string 6; An input of described high frequency magnetic core isolating transformer 1 connects two contact pin 4a, 4b and 5a, the 5b of fluorescent tube.

The low frequency rectifier bridge 9 etc. that the utility model can also comprise the high frequency capacitance 3 that is parallel to rectifier bridge 2 outputs and be series at the high frequency capacitance 8 of high frequency magnetic core isolating transformer 1 input and be parallel to another high frequency capacitance 8.The output of the output of rectifier bridge 2 and low frequency rectifier bridge 9 is parallel to the both positive and negative polarity of high frequency capacitance 3 and LED lamp string 6 simultaneously, and provides electric energy for it; An input of high frequency magnetic core isolating transformer 1 and an input of another high frequency capacitance 8 are connected two contact pin 4a, 4b and 5a, the 5b of fluorescent tube 7 respectively.

Described fluorescent tube contact pin comprises the contact pin that is electrically connected at traditional fluorescent lamp pipe two; Described led drive circuit device is made into the shape and size the same with common fluorescent tube together with LED lamp string, so the user can directly replace original common fluorescent tube with the LED fluorescent tube very simply on original daylight lamp bracket.

Described rectifier bridge 2 is connected into half-bridge or is connected into full-bridge; Reinstall the constant-current circuit 11 of a wide voltage input between described low frequency rectifier bridge 9 and the LED lamp string 6.

The utility model can be applied to be equipped with the daylight lamp bracket of High Frequency Electric Ballast and low frequency inductance rectifier simultaneously, but during real work, some the element roles in the circuit have nothing in common with each other.When the LED fluorescent tube of using the utility model making is installed in the High Frequency Electric Ballast lamp bracket, the high-frequency current of rectifier 10 current limlitings that carried by lamp bracket is by fluorescent tube 7 contact pin 4a, 4b and 5a, 5b feed-in circuit described in the utility model, because the capacity of another high frequency capacitance 8 is the enough height (generally greater than 20 KHz) of output frequency of big (microfarad) and hf rectifier enough, so high-frequency current can not enter low frequency rectifier bridge 9; High frequency power will all enter isolating transformer 1, be obtained pure constant current direct current by high frequency capacitance 3 filtering then, and this direct current is used to direct driving LED lamp string 6; When the LED fluorescent tube that uses circuit production described in the utility model is installed in low frequency inductance rectifier lamp bracket, among contact pin 4a, the 4b and 5a, 5b feed-in circuit described in the utility model of the low-frequency current that is carried moral rectifier 10 current limlitings by lamp bracket by fluorescent tube 7.Because high-frequency isolation transformer 1 inductance value very little (have only several millis enjoy or littler), and the output frequency of low frequency rectifier very low (50 or 60 hertz), so low-frequency current can not be entered rectifier bridge 2 by high-frequency isolation transformer 1 conversion, but by giving LED lamp string 6 power supplies after 9 rectifications of low frequency rectifier bridge; In addition in order to mate low frequency inductance rectifier or high-frequency electrical minor ballast better, the power of LED lamp string 6 is designed to the same parameter of common fluorescence fluorescent tube, so as long as gross power is equal to the power of a standard fluorescence fluorescent tube, also can many LED fluorescent tubes of ballast driven of simple realization, and these many LED fluorescent tubes fluorescent tube that is equal to a calibration power in parallel together.

In sum, use driving circuit device described in the utility model and can allow LED lamp string realize the compatibility use of low-and high-frequency daylight lamp bracket easily, possess the same installation environment of common fluorescence fluorescent tube.In addition, if between low frequency rectifier bridge 9 and LED lamp string 6, reinstall the constant-current circuit 11 of a wide voltage input (for example 90-350DC), as shown in Figure 2, then the utility model circuit not only can be installed on the daylight lamp bracket of High Frequency Electric Ballast or low frequency inductance rectifier, also can be directly connected to civil power, and global electrical network self adaptation, LED fluorescent tube are really accomplished general any installation environment, greatly provide convenience for the user.

What particularly point out is: 9 of another high frequency capacitance 8 in the driving circuit device described in the utility model and low frequency rectifier bridges are used at low frequency Inductive ballast lamp bracket and are just played a role when directly being connected civil power, when being applied to the high-frequency electronic ballast lamp bracket, do not play a role, when therefore if LED lamp string only is applied to the high-frequency electronic ballast lamp bracket, for saving cost, another high frequency capacitance 8 and low frequency rectifier bridge 9 and constant-current circuit 11 can remove.

Other related technology of not addressing in detail of the utility model is known technology, and those skilled in the art can implement the utility model easily on the basis of understanding the utility model content

Claims

1. the driving circuit device of a LED fluorescent tube is characterized in that it includes a high frequency magnetic core isolating transformer (1), is parallel to the rectifier bridge (2) of isolating transformer (1) output, is parallel to the high frequency capacitance (3) of rectifier bridge (2) output; The output of described rectifier bridge (2) is parallel to the both positive and negative polarity of high frequency capacitance (3) and LED lamp string (6); An input of described high frequency magnetic core isolating transformer (1) connects two contact pin of fluorescent tube.

2. the driving circuit device of LED fluorescent tube according to claim 1 is characterized in that the low frequency rectifier bridge (9) that described high frequency magnetic core isolating transformer (1) input is in series with another high frequency capacitance (8) and is parallel to this high frequency capacitance (8); The output of the output of described rectifier bridge (2) and low frequency rectifier bridge (9) is parallel to the both positive and negative polarity of high frequency capacitance (3) and LED lamp string (6) simultaneously; Input of described high frequency magnetic core isolating transformer (1) and an input of another high frequency capacitance (8) are connected two contact pin of fluorescent tube respectively.

3. the driving circuit device of LED fluorescent tube according to claim 1 and 2 is characterized in that described fluorescent tube contact pin comprises the contact pin that is electrically connected at traditional fluorescent lamp pipe two; Described led drive circuit device is made into the installation dimension the same with common fluorescent tube together with LED lamp string.

4. the driving circuit device of LED fluorescent tube according to claim 1 and 2 is characterized in that described rectifier bridge (2) is connected into half-bridge or is connected into full-bridge; Reinstall the constant-current circuit (11) of a wide voltage input between described low frequency rectifier bridge (9) and the LED lamp string (6).