CN2937822Y

CN2937822Y - Improved circuit for tube set of LED backlight

Info

Publication number: CN2937822Y
Application number: CNU2006200052238U
Authority: CN
Inventors: 许正家; 潘昱成
Original assignee: Logah Technology Corp
Current assignee: Logah Technology Corp
Priority date: 2006-01-21
Filing date: 2006-01-21
Publication date: 2007-08-22
Anticipated expiration: 2016-01-21

Abstract

A LCD back light source modified grouped bulb circuit includes a bulb start-up circuit board, a first bulb connection board, a second bulb connection board and a group of low-voltage wires. The bulb start-up circuit board is provided with a control circuit and the first connector, the second bulb connection board is provided with the second connector and a plurality of digital transformers according to the bulb number employed, and setup digital bulb at the place between the first bulb connection board and the second bulb connection board, the first connector on the bulb start-up circuit board transmits the signal through low-voltage wire to the second connector on first bulb connection board, the second connector transmits the signal to each transformer to drive the operation of bulb group. The utility model modifies the problems that to utilize a plurality of connectors and complicated connecting wires, tremendously reduces the volume of bulb start-up circuit board and production cost.

Description

The light tube group improved circuit of LCD backlight

Technical field

The utility model is the light tube group improved circuit about a kind of LCD backlight, is meant a kind of circuit setting of the LCD of can be applicable to backlight lighting tube group especially.

Background technology

See also Figure 1A and Figure 1B, for commonly using vertical view and the side view that LCD (LCD) backlight lighting tube group is provided with framework, by among the figure as can be known, commonly use LCD backlight lighting tube group framework 1 is set, has a control circuit 111 on this fluorescent tube start-up circuit plate 11, the set transformer 112 of corresponding fluorescent tube 12 quantity, per two transformers, 112 corresponding connectors 113 that are provided with, and export signal to be set up in 15 of the first fluorescent tube connecting plate 14 and the second fluorescent tube connecting plates several fluorescent tubes 12 by transformer 112 through connector 113 respectively by high-voltage line 13, can drive 12 actions of number fluorescent tube smoothly in order to do the control signal that makes fluorescent tube start-up circuit 11.Drive the light tube group action though above-mentioned Implementation Modes can reach, have following shortcoming:

1. in the practical Implementation Modes, per two transformers need corresponding connector, owing to use a plurality of connectors, therefore cause the manufacturing cost of product to increase.

2. commonly use in the Implementation Modes, corresponding fluorescent tube quantity must be provided with several transformers on fluorescent tube start-up circuit plate, therefore fluorescent tube quantity is got over multiple transformers in a disguised form to increasing, and so will increase the volume of fluorescent tube start-up circuit plate, causes the problems such as being difficult for reaching the cost increase that is provided with easily.

3. commonly use in the Implementation Modes, need to be connected to several fluorescent tubes respectively with several high-voltage lines, therefore will increase high-voltage line causes fluorescent tube to damage because of pullling chance, moreover the situation that high-voltage line more than one knottings are twined is with of common occurrence from connector.

This shows that the above-mentioned mode of commonly using still has many disappearances, real non-one kindhearted design, and demand urgently being improved.

This case utility model application people commonly uses every shortcoming and the deficiency that mode is derived in view of above-mentioned, is urgently to think to be improved innovation, and after concentrating on studies through taking great pains to attain one's goal for many years, and successfully the light tube group improved circuit of this part LCD backlight is finished in research and development finally.

The utility model content

The purpose of this utility model promptly is to provide a kind of light tube group improved circuit of LCD backlight, can reduce the usage quantity of connector and high-voltage line, effectively reaches the purpose that reduces cost.

An of the present utility model purpose promptly is to provide a kind of light tube group improved circuit of LCD backlight, can effectively dwindle the volume of fluorescent tube start-up circuit plate, except that can effectively reducing cost, has more installing and is easy to advantage.

Another purpose of the present utility model is to provide a kind of light tube group improved circuit of LCD backlight, has the stability that improves product and use, increases the service life, reduces product cost and saving is provided with advantages such as space.

Can reach the light tube group improved circuit of the LCD backlight of above-mentioned novel purpose, be formed by fluorescent tube start-up circuit plate, the first fluorescent tube connecting plate, the second fluorescent tube connecting plate and one group of low-voltage line; Have a control circuit and first connector on this fluorescent tube start-up circuit plate, second connector and the corresponding set several transformers of fluorescent tube quantity that use then are set on this second fluorescent tube connecting plate, to count tube rack again is located between the first fluorescent tube connecting plate and the second fluorescent tube connecting plate, by each connector that is arranged on the fluorescent tube start-up circuit plate, with low-voltage line signal is transferred to second connector that is arranged on the first fluorescent tube connecting plate, make this second connector export signal to each transformer to drive the light tube group action; The utility model can improve custom circuit need be used a large amount of connectors and problem such as numerous and diverse connecting line is set, and can significantly reduce the volume of fluorescent tube start-up circuit plate and reduce the manufacturing cost of product.

The light tube group improved circuit of LCD backlight provided by the utility model when comparing mutually with other located by prior art, has more following advantage:

1. the light tube group improved circuit of the utility model LCD backlight can reduce the usage quantity of connector and high-voltage line, effectively reaches the purpose that reduces cost.

2. the light tube group improved circuit of the utility model LCD backlight can effectively be dwindled the volume of fluorescent tube start-up circuit plate, except that can effectively reducing cost, has more installing and is easy to advantage.

3. the light tube group improved circuit of the utility model LCD backlight has the stability that improves product and use, increases the service life, reduces product cost and saving is provided with advantages such as sky is.

Description of drawings

See also the detailed description and the accompanying drawing thereof of following relevant the utility model one preferred embodiment, can further understand technology contents of the present utility model and purpose effect thereof; The accompanying drawing of relevant this embodiment is:

Figure 1A commonly uses the vertical view that LCD backlight lighting tube group is provided with framework;

Figure 1B commonly uses the side view that LCD backlight lighting tube group is provided with framework;

Fig. 2 A is that first embodiment of the light tube group improved circuit of the utility model LCD backlight implements the framework vertical view;

Fig. 2 B implements the framework side view for first embodiment of the light tube group improved circuit of this LCD backlight;

Fig. 3 A implements the framework vertical view for second embodiment of the light tube group improved circuit of this LCD backlight; And

Fig. 3 B implements the framework side view for first embodiment of the light tube group improved circuit of this LCD backlight.

The major part conventional letter: 1 is provided with framework for LCD backlight lighting tube group, and 11 is fluorescent tube start-up circuit plate, and 111 is control circuit, 112 is transformer, and 113 is connector, and 12 is fluorescent tube, 13 is high-voltage line, and 14 is the first fluorescent tube connecting plate, and 15 is the second fluorescent tube connecting plate, 2 is the light tube group improved circuit of LCD backlight, 21 is fluorescent tube start-up circuit plate, and 211 is control circuit, and 212 is first connector, 22 is the first fluorescent tube connecting plate, 23 is the second fluorescent tube connecting plate, and 231 is second connector, and 232 is transformer, 24 is light tube group, 25 is low-voltage line, and 3 is the light tube group improved circuit of LCD backlight, and 31 is the first fluorescent tube connecting plate, 311 is current transformer, and 32 is light tube group.

The specific embodiment

See also Fig. 2 A and Fig. 2 B, implement framework vertical view and side view for the utility model provides first embodiment of the light tube group improved circuit of LCD backlight, by among the figure as can be known, the light tube group improved circuit 2 of the utility model LCD backlight comprises:

One fluorescent tube start-up circuit plate 21 has a control circuit 211 and first connector 212 on this fluorescent tube start-up circuit plate 21; Wherein this control circuit 211 also can be pulse wave width modulation device (PWMIC) or microprocessor;

One first fluorescent tube connecting plate 22,23 of this first fluorescent tube connecting plate 22 and the second fluorescent tube connecting plates set up the required light tube group of LCD backlight 24; Wherein this first fluorescent tube connecting plate 22 also can be replaced by connecting line;

One second fluorescent tube connecting plate 23 then is provided with second connector 231 and the set several transformers 232 of corresponding light tube group 24 quantity on this second fluorescent tube connecting plate 23;

One group of low-voltage line 25 is connected on the fluorescent tube start-up circuit plate 21 on first connector 212 and the second fluorescent tube connecting plate 23 between second connector 231;

By first connector 212 that is arranged on the fluorescent tube start-up circuit plate 21, with low-voltage line 25 signal is transferred to second connector 231 that is arranged on the first fluorescent tube connecting plate 22, make this second connector 231 export signal to each transformer 232 to drive light tube group 24 actions.

See also Fig. 3 A and Fig. 3 B, for providing second embodiment of the light tube group improved circuit of LCD backlight, the utility model implements framework vertical view and side view, by among the figure as can be known, the light tube group improved circuit 3 of the utility model LCD backlight, with the foregoing description difference, be to be on first lighting tube connector 31 more than one current transformer 311 to be set, but by the flow through electric current of light tube group 32 of these current transformer 311 active balances.

Above-listed detailed description is specifying at a possible embodiments of the present utility model, only this embodiment is not in order to limit claim of the present utility model, all ends break away from equivalence enforcement or the change that the utility model skill spirit is done, and all should be contained in the claim of this case.

Claims

1. the light tube group improved circuit of a LCD backlight is characterized in that it comprises:

One fluorescent tube start-up circuit plate has a control circuit and first connector on this fluorescent tube start-up circuit plate;

One first fluorescent tube connecting plate between this first fluorescent tube connecting plate and the second fluorescent tube connecting plate, sets up the required light tube group of LCD backlight;

One second fluorescent tube connecting plate then is provided with second connector and the set several transformers of corresponding light tube group quantity on this second fluorescent tube connecting plate;

One group of low-voltage line is connected on the fluorescent tube start-up circuit plate on first connector and the second fluorescent tube connecting plate between second connector.

2. the light tube group improved circuit of a LCD backlight is characterized in that it comprises:

One first fluorescent tube connecting line between this first fluorescent tube connecting plate and the second fluorescent tube connecting plate, sets up the required light tube group of LCD backlight;

3. the light tube group improved circuit of LCD backlight according to claim 1 is characterized in that on this first fluorescent tube connecting plate more than one current transformer being set.

4. the light tube group improved circuit of LCD backlight according to claim 1 is characterized in that this control circuit can be the pulse wave width modulation device.

5. the light tube group improved circuit of LCD backlight according to claim 1 is characterized in that this control circuit can be microprocessor.