CN201430718Y - Lamp tube driving device - Google Patents

Abstract

The utility model provides a lamp tube driving device, which consists of a direct current power supply, a square wave switcher, a square wave controller, an LC resonance circuit, a transformer and a lamp tube group; the square wave signal is output to the LC resonance circuit through the square wave switcher, the square wave signal is converted into a sine wave signal through the LC resonance circuit, the sine wave signal is output to the driving transformer, and finally the driving transformer drives the external electrode type lamp tube group or the cold cathode lamp tube group to act; the utility model discloses a LC resonance circuit converts square wave signal into sine wave signal earlier, offers the framework that outside electrode formula banks or cold cathode fluorescent tube group used through driving transformer, will effectively promote the conversion efficiency of transformer, promotes drive arrangement's stability.

Description

Lamp driver

technical field

The utility model relates to a lamp tube driving device, in particular to a lamp tube used to drive at least one external electrode type lamp tube (such as: CPFL lamp tube, HCFL lamp tube, EEFL lamp tube, etc.) or a cold cathode lamp tube drive unit.

Background technique

Please refer to FIG. 1 , which is an implementation structure diagram of an existing lamp driving device. It can be seen from the figure that the driving mode of the existing external electrode type lamp driving device 1 is that a DC power supply 11 provides a DC signal to the square. A wave switcher 12, the square wave switcher 12 can provide a square wave signal to the drive transformer 13, and through the leakage inductance (not shown in the figure) and the capacitance element 14 on the secondary side of the drive transformer 13, the square wave signal can be converted The sine wave signal is then provided to the external electrode type lamp tube 15 for use. Although the above-mentioned driving method can activate the external electrode type lamp, it has the following disadvantages in use:

Under the existing structure, the sine wave signal is generated by the leakage inductance and capacitive components of the driving transformer, which will lead to the deterioration of the conversion efficiency of the driving transformer, which will easily increase the operating temperature and even cause the electronic components or circuits to burn out.

Under the existing structure, the sine wave signal is generated by the leakage inductance and capacitance elements of the driving transformer, which will lead to poor conversion performance of the driving transformer, requiring the use of a larger transformer.

Under the existing structure, the generation of the sine wave signal depends on the leakage inductance and capacitive components of the driving transformer. Therefore, the selection of the driving transformer will directly affect the magnitude of the leakage inductance, causing inconvenience to the circuit design.

It can be seen that the above-mentioned prior art still has many deficiencies, which is not a good design and needs to be improved urgently.

In view of the various shortcomings and deficiencies derived from the above-mentioned prior art, the author of this case desperately wanted to improve and innovate, and after years of painstaking research, he finally successfully developed and completed this lamp driving device.

Contents of the invention

The purpose of this utility model is to provide a lamp drive device, which first converts the square wave signal into a sine wave signal through the LC resonant circuit, and then provides it to the external electrode lamp group or cold cathode lamp group through the drive transformer. The structure can effectively improve the conversion performance of the transformer and improve the stability of the driving device.

The lamp driving device that can achieve the above-mentioned new purpose is composed of a DC power supply, a square wave switcher, a square wave controller, an LC resonant circuit, a transformer and a lamp group; the square wave signal is output through the square wave switcher to the LC resonant circuit, and convert the square wave signal into a sine wave signal through the LC resonant circuit, and the sine wave signal will be output to the driving transformer, and finally drive the external electrode lamp group or cold cathode lamp through the driving transformer group action.

Compared with the prior art, the lamp driving device of the utility model firstly converts the square wave signal into a sine wave signal through the LC resonant circuit, and then provides it to the external electrode lamp group or the cold cathode lamp group through the drive transformer. The structure can effectively improve the conversion performance of the transformer and improve the stability of the driving device.

Description of drawings

Please refer to the following detailed description and accompanying drawings of a preferred embodiment of the utility model, and further understand the technical contents and purpose effects of the utility model; the accompanying drawings of the relevant embodiments are:

FIG. 1 is an implementation structure diagram of an existing lamp driving device;

Fig. 2 is the structure diagram of the first embodiment of the lamp tube driving device of the present invention; and

Fig. 3 is a structural diagram of the second implementation of the lamp driving device.

Explanation of reference signs: 1-existing external electrode type lamp tube driving device; 11-DC power supply; 12-square wave switcher; 13-driving transformer; 14-capacitance element; 15-external electrode type lamp tube; 2 -External electrode type lamp drive device; 21-DC power supply; 22-square wave switcher; 23-LC resonant circuit; 231-inductance element; 232-capacitance element; 24-square wave controller; 25-driving transformer ; 26-external electrode lamp group; 261-external electrode lamp.

Detailed ways

Please refer to Fig. 2, which is the first implementation structure diagram of the lamp driving device provided by the present invention. It can be seen from the figure that the lamp driving device of the present invention includes:

A DC power supply 21 can provide a DC signal to the square wave switcher 22;

The square wave switcher 22 converts the DC signal input by the DC power supply 21 into a square wave signal and outputs it to the LC resonant circuit 23; at the same time, it can accept the control signal of the square wave controller 24 to control the output of the square wave signal. size;

An LC resonant circuit 23 is composed of an inductance element 231 and a capacitance element 232, which can convert the square wave signal input by the square wave switcher 22 into a sine wave signal and then output it to the drive transformer 25;

A driving transformer 25, which converts the input sine wave signal, and then outputs it to the lamp group 26 to drive the lamp group 26 to operate;

A lamp tube group 26 is made up of at least one external electrode type lamp tube 261 (such as: CPFL lamp tube, HCFL lamp tube, EEFL lamp tube, etc.) The secondary side of the transformer 25 is connected, and the other end of the lamp group 25 is connected to the reference level.

Please refer to FIG. 3 , which is a structural diagram of the second implementation of the lamp driving device provided by the present invention. It can be seen from the figure that the difference between the second embodiment of the present invention and the first embodiment is that the lamp group 26 The two ends of each are respectively connected to the two ends of the secondary side of the drive transformer 25, thereby forming a primary loop.

Compared with other prior art, the lamp tube driving device provided by the utility model has the following advantages:

The external electrode type lamp tube driving device of the utility model firstly converts the square wave signal into a sine wave signal through the LC resonant circuit, and provides the structure used by the external electrode type lamp tube group through the driving transformer, which can effectively improve the conversion of the transformer performance and improve the stability of the drive.

The external electrode type lamp tube driving device of the utility model can effectively improve the transforming efficiency of the transformer, thereby reducing the volume of the transformer.

The external electrode type lamp tube drive device of the utility model has the advantages of improving the stability of product use, prolonging the service life, and easy adjustment of circuit parameters.

The above detailed description is a specific description of a feasible embodiment of the utility model, but the embodiment is not used to limit the patent scope of the utility model, and any equivalent implementation or change that does not depart from the technical spirit of the utility model, should be included in the patent scope of this case.

Claims (6)

1. a lamp tube driver is characterized in that, comprising:

One direct current power supply unit can provide a direct current signal to the square wave switch;

One square wave switch with the direct current signal that described DC power supply is imported, exports the LC resonant circuit to after converting square-wave signal to; The control signal of while energy reciever wave controller is with the size of control output square-wave signal;

One LC resonant circuit, the square-wave signal that described square wave switch can be imported exports driving transformer to after converting string ripple signal to again;

One driving transformer is changed the string ripple signal of input, exports outer electrode formula light tube group again to, in order to drive the light tube group start;

One light tube group is made up of at least one outer electrode formula fluorescent tube or cold cathode fluorescent lamp, and one end and described driving transformer secondary side join, and the described light tube group other end is connected to altogether with reference to accurate position.

2. lamp tube driver as claimed in claim 1 is characterized in that, described LC resonant circuit is made up of an inductance element and a capacity cell.

3. lamp tube driver as claimed in claim 1 is characterized in that, described outer electrode formula fluorescent tube is CPFL fluorescent tube, HCFL fluorescent tube or EEFL fluorescent tube.

4. a lamp tube driver is characterized in that, comprising:

One direct current power supply unit can provide a direct current signal to the square wave switch;

One square wave switch with the direct current signal that described DC power supply is imported, exports the LC resonant circuit to after converting square-wave signal to; The control signal of while energy reciever wave controller is with the size of control output square-wave signal;

One LC resonant circuit, the square-wave signal that described square wave switch can be imported exports driving transformer to after converting string ripple signal to again;

One driving transformer is changed the string ripple signal of input, exports outer electrode formula light tube group again to, in order to drive the light tube group start;

One light tube group is made up of at least one outer electrode formula fluorescent tube or cold cathode fluorescent lamp, and the two ends of described light tube group join with the two-end-point of described driving transformer secondary side respectively, and then form a loop.

5. lamp tube driver as claimed in claim 4 is characterized in that, described LC resonant circuit is made up of an inductance element and a capacity cell.

6. lamp tube driver as claimed in claim 4 is characterized in that, described outer electrode formula fluorescent tube is CPFL fluorescent tube, HCFL fluorescent tube or EEFL fluorescent tube.

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