CN201017611Y

CN201017611Y - LCD back light source driving mechanism with isolation type transformer device

Info

Publication number: CN201017611Y
Application number: CNU2006201659055U
Authority: CN
Inventors: 许正家; 潘昱成; 陈和文
Original assignee: Logah Technology Corp
Current assignee: Logah Technology Corp
Priority date: 2006-12-01
Filing date: 2006-12-01
Publication date: 2008-02-06
Anticipated expiration: 2016-12-01

Abstract

The utility model relates to a liquid crystal backlight source drive device equipped with an isolated transformer, which comprises a DC power supply, a square wave switcher, a square wave controller, an isolated transformer, and a drive transformer; therein, the primary side of the isolated transformer is connected with the square wave switcher, the secondary side is connected with the drive transformer, because the isolated transformer is arranged between the square wave switcher and the drive transformer, accordingly the safe regulated distance needed by setting the drive transformer can be efficiently reduced; the utility model adds the isolated transformer to the existing device which can efficiently reduce the safe regulated distance needed by using drive transformer directly, the setting area of the circuit board is decreased, and the problem that the cost is too high is solved.

Description

LCD backlight source drive device with isolated transformer

Technical field

The utility model relates to a kind of LCD backlight source drive device, be meant a kind of setting of using isolating transformer especially, to reduce the technology of LCD backlight source drive device manufacturing cost with isolated transformer.

Background technology

See also Fig. 1, enforcement Organization Chart for the available liquid crystal backlight driving device, by among the figure as can be known, be available liquid crystal backlight driving device 1, be to rely on driving transformer 11 that power signal is desired to boost to secondary side 1200V by the 400V of primary side, use to offer fluorescent tube 12, but set-up mode so, for meeting the security regulations distance, driving transformer 11 1, therefore the safe spacing that 18mm need be arranged between secondary side at least drives under the prerequisite of a tubes 12 at a driving transformer 11, so the drive circuit board of being made up of number driving transformer 11, it is just considerable that it is provided with area, will make that so cost greatly increases.

This shows that above-mentioned prior art still has many disappearances, real non-one kindhearted deviser, and demand urgently being improved.

Every shortcoming and deficiency that this case utility model designer derives in view of above-mentioned prior art, be urgently to think to be improved innovation, and after concentrating on studies through taking great pains to attain one's goal for many years, successfully the LCD backlight source drive device that this part has isolated transformer is finished in research and development finally.

Summary of the invention

The purpose of this utility model promptly is to provide a kind of LCD backlight source drive device with isolated transformer, can effectively shorten the required security regulations distance of driving transformer, so reduce circuit board area, the problem that the solving device cost is too high be set.

A time purpose of the present utility model is to be to provide a kind of LCD backlight source drive device with isolated transformer, is to have the degree of stability that improves product and use, increase the service life, dwindle the transformer size and saving is provided with advantages such as space.

Can reach the LCD backlight source drive device with isolated transformer of above-mentioned novel purpose, be arranged in pairs or groups by DC power supply, square wave switch, square wave controller, isolating transformer and driving transformer and form; Wherein said isolating transformer primary side is to be connected with the square wave switch, secondary side then is connected with driving transformer, because isolating transformer is arranged between square wave switch and the driving transformer, required security regulations distance in the time of therefore can effectively shortening driving transformer and be provided with; The utility model is set up isolating transformer in existing apparatus, can effectively shorten the required security regulations distance of direct use driving transformer, so reduce circuit board area, the problem that the solving device cost is too high be set.

Description of drawings

Fig. 1 is the enforcement Organization Chart of available liquid crystal backlight driving device;

Fig. 2 is the first enforcement Organization Chart that the utlity model has the LCD backlight source drive device of isolated transformer;

Fig. 3 is the described second enforcement Organization Chart with LCD backlight source drive device of isolated transformer; And

Fig. 4 is described the 3rd enforcement Organization Chart with LCD backlight source drive device of isolated transformer.

Description of reference numerals: 1-LCD backlight source drive device; The 11-driving transformer; The 12-fluorescent tube; 2-has the LCD backlight source drive device of isolated transformer; The 21-DC power supply; 22-square wave switch; 23-square wave controller; The 24-isolating transformer; The 25-driving transformer; The 26-fluorescent tube.

Embodiment

See also Fig. 2, provide first of LCD backlight source drive device with isolated transformer to implement Organization Chart for the utility model, by among the figure as can be known, the utlity model has the LCD backlight source drive device 2 of isolated transformer, be to comprise:

One direct current power supply unit 21 is that exportable direct supply uses for square wave switch 22;

One square wave switch 22 is after converting described direct supply to AC power, to export isolating transformer 24 primary sides again to;

One square wave controller 23 is that exportable controlling signal is to square wave switch 22;

One isolating transformer 24 is to receive the power signal that square wave switch 22 is imported, and exports power signal to driving transformer 25 primary sides by secondary side again;

One driving transformer 25 is boosted the power signal that isolating transformer 24 is imported, and exports fluorescent tube 26 to by driving transformer 25 secondary sides again.

If with isolating transformer 24 primary side input voltage 400V is example, described isolating transformer 24 secondary side output voltages will be less than 400V, only need have the safety of 6mm ask distance between isolating transformer 24 first and second sides this moment, therefore can effectively the use of above-mentioned isolating transformer will be relied on, can effectively shorten the required security regulations distance of direct use driving transformer, and then reduce circuit board area, the problem that the solving device cost is too high be set.

See also Fig. 3, provide second of LCD backlight source drive device with isolated transformer to implement Organization Chart for the utility model, by among the figure as can be known, the utlity model has the LCD backlight source drive device 2 of isolated transformer, be to comprise:

See also Fig. 4, provide the 3rd of LCD backlight source drive device with isolated transformer to implement Organization Chart for the utility model, by among the figure as can be known, the utlity model has the LCD backlight source drive device 2 of isolated transformer, be to comprise:

One isolating transformer 24 is to receive the power signal that square wave switch 22 is imported, and exports power signal to several driving transformer 25 primary sides respectively by secondary side again;

Number driving transformer 25 is boosted the power signal that isolating transformer 24 is imported, and exports fluorescent tube 26 respectively to by driving transformer 25 secondary sides again.

In above-mentioned enforcement framework, can set up electric capacity at the primary side or the secondary side of isolating transformer, disturb in order to prevent direct current.

LCD backlight source drive device with isolated transformer provided by the utility model, and other prior art has more following advantage mutually relatively the time:

The utlity model has the LCD backlight source drive device of isolated transformer, is effectively to shorten the required security regulations distance of driving transformer, so reduce circuit board area, the problem that the solving device cost is too high be set.

The utlity model has the LCD backlight source drive device of isolated transformer, is to have the degree of stability that improves product and use, increase the service life, dwindle the transformer size and saving is provided with advantages such as space.

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

In sum, this case not only really belongs to innovation on the kenel of space, and can promote above-mentioned multinomial effect by existing article, the legal novel patent requirement that should fully meet novelty and progressive, file an application in the whence in accordance with the law, earnestly ask your office and check and approve the novel patent application case of this part, to encourage utility model, to feeling moral just.

Claims

1. LCD backlight source drive device with isolated transformer, it is characterized in that: it comprises:

One direct current power supply unit is that the output DC source uses for the square wave switch;

One square wave switch is after converting described direct supply to AC power, to export the isolating transformer primary side again to;

One square wave controller is that the output controlling signal is to the square wave switch;

One isolating transformer is to receive the power signal that the square wave switch is imported, and exports power signal to the driving transformer primary side by secondary side again;

One driving transformer is boosted the power signal that isolating transformer is imported, and exports fluorescent tube to by the driving transformer secondary side again.

2. a kind of LCD backlight source drive device with isolated transformer according to claim 1, it is characterized in that: the primary side or the secondary side of described isolating transformer are set up electric capacity.

3. LCD backlight source drive device with isolated transformer, it is characterized in that: it comprises:

4. a kind of LCD backlight source drive device with isolated transformer according to claim 3, it is characterized in that: the primary side or the secondary side of described isolating transformer are set up electric capacity.

5. LCD backlight source drive device with isolated transformer, it is characterized in that: it comprises:

One isolating transformer is to receive the power signal that the square wave switch is imported, and exports power signal to several driving transformer primary sides respectively by secondary side again;

The number driving transformer is boosted the power signal that isolating transformer is imported, and exports fluorescent tube respectively to by the driving transformer secondary side again.

6. a kind of LCD backlight source drive device with isolated transformer according to claim 5, it is characterized in that: the primary side or the secondary side of described isolating transformer are set up electric capacity.