CN201388327Y - LCD backlight source lamp tube assembly circuit - Google Patents
LCD backlight source lamp tube assembly circuit Download PDFInfo
- Publication number
- CN201388327Y CN201388327Y CN200820161999U CN200820161999U CN201388327Y CN 201388327 Y CN201388327 Y CN 201388327Y CN 200820161999 U CN200820161999 U CN 200820161999U CN 200820161999 U CN200820161999 U CN 200820161999U CN 201388327 Y CN201388327 Y CN 201388327Y
- Authority
- CN
- China
- Prior art keywords
- transformer
- polarity
- lcd backlight
- lamp tube
- tube assembly
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to an LCD backlight source lamp tube assembly circuit, and in particular relates to the application of a transformer with alternating polarity in the LCD backlight source lamp tube assembly circuit. A transformer with the polarity at one side being identical to each other and at the other side being different from each other is adopted to drive lamp tubes with different polarities, so that the homonymic end of the transformer can be sequentially connected with each other, thus changing the situation that the homonymic end of the traditional transformer is alternatively connected with each other. The LCD backlight source lamp tube assembly circuit can save the cost, have stable work and simple process flow and can reduce the interference of the high-voltage electric field of the lamp tube on the external.
Description
Technical field:
The present invention relates to a kind of LCD backlight lighting tube circuit, relate in particular to the LCD backlight lighting tube group improved circuit that a kind of many fluorescent tubes are formed.
Background technology:
General in the LCD backlight of forming by many fluorescent tubes, for lowering the interference to external world of fluorescent tube high voltage electric field, use and often fluorescent tube is staggered according to polarity of voltage is positive and negative, so that the influence of generating positive and negative voltage payment, illustrate the fluorescent tube arrangement mode with reference to Fig. 1, wherein, Fig. 1 (a) for light tube electric voltage polarity according to+-+-arrange fluorescent tube, Fig. 1 (b) complies with for light tube electric voltage polarity ++--arrange fluorescent tube, Fig. 1 (c) for light tube electric voltage polarity according to+--+arrange fluorescent tube, other can also be arranged according to the be staggered mode of fluorescent tube of positive-negative polarity in prior art.
With reference to Fig. 2, prior art is the identical transformer of general use in LCD backlight lighting tube circuit, be that the transformer primary side is all identical with the polarity of secondary side, cause secondary side voltage and opposite current by primary side voltage and opposite current, to satisfy light tube electric voltage polarity according to the be staggered needs of fluorescent tube of positive-negative polarity, when on circuit board, connecting up, must be by staggered connected mode, generally must adopt two-sided or multiaspect circuit board or shorting stub, thereby increase cost, influence the stability of circuit.
For overcoming the shortcoming of above-mentioned prior art, the inventor provides the present utility model.A kind of LCD backlight lighting tube group improved circuit will be provided.
Summary of the invention:
Goal of the invention of the present utility model is: at aforementioned present situation, provide a kind of LCD backlight lighting tube group improved circuit, avoid the mode of staggered wiring, reduce production costs, improve circuit stability.
The purpose of this utility model realizes by following technical solution:
A kind of LCD backlight lighting tube group circuit comprises transformer, fluorescent tube, and described fluorescent tube is staggered according to polarity of voltage is positive and negative, and Circuit Fault on Secondary Transformer is connected with fluorescent tube, and the transformer of opposed polarity is staggered according to the staggered of light tube electric voltage polarity.
The purpose of this utility model can also further realize by following technical solution:
Aforementioned LCD backlight lighting tube group circuit, described transformer is a primary side polarity difference, secondary side polarity is identical.
Aforementioned LCD backlight lighting tube group circuit, described transformer is that primary side polarity is identical, secondary side polarity difference.
LCD backlight lighting tube group circuit described in the utility model, primary side voltage and electric current are identical, the mode of being cross-linked can not be adopted in wiring on circuit board, but reaches secondary side voltage and opposite current by the transformer of opposed polarity, to satisfy the different needs of light tube electric voltage polarity.Because the mode of being cross-linked is not adopted in wiring on the circuit board, can adopt the single face circuit board, and needn't adopt shorting stub, thereby reduce cost, improve stability.
Hereinafter will be for some embodiment, and be described in further detail in conjunction with the accompanying drawings.
Description of drawings
Fig. 1 is that the mode of the positive and negative fluorescent tube that is staggered of polarity of voltage illustrates;
Fig. 2 is existing LCD backlight lighting tube group circuit diagram;
Fig. 3 is the LCD backlight lighting tube group circuit diagram of first kind of embodiment of the utility model;
Fig. 4 is the LCD backlight lighting tube group circuit diagram of second kind of embodiment of the utility model.
Embodiment:
First embodiment:
Please refer to Fig. 3, be the LCD backlight lighting tube group circuit diagram of first kind of embodiment of the utility model.As shown in Figure 3, the LCD backlight lighting tube group circuit of the utility model comprises: transformer 11～14, fluorescent tube 21～24, fluorescent tube 21～24 is according to positive and negative being staggered of polarity of voltage "+-+-", transformer 11～14 secondary sides are connected with fluorescent tube 21～24 respectively, transformer 11 is different with transformer 12 primary side polarity, secondary side polarity is identical, transformer 13 is different with transformer 14 primary side polarity, secondary side polarity is identical, and the transformer of opposed polarity is staggered according to the staggered of light tube electric voltage polarity.
Second embodiment:
Please refer to Fig. 4, be the LCD backlight lighting tube group circuit diagram of first kind of embodiment of the utility model.As shown in Figure 4, the LCD backlight lighting tube group circuit of the utility model comprises: transformer 11～14, fluorescent tube 21～24, fluorescent tube 21～24 is according to positive and negative being staggered of polarity of voltage "+-+-", transformer 11～14 secondary sides are connected with fluorescent tube 21～24 respectively, transformer 11 is identical with transformer 12 primary side polarity, secondary side polarity is different, transformer 13 is identical with transformer 14 primary side polarity, secondary side polarity is different, and the transformer of opposed polarity is staggered according to the staggered of light tube electric voltage polarity.
In addition to the implementation, the utility model can also have other execution modes, and the identical or different etc. of identical or different, the Circuit Fault on Secondary Transformer polarity of the arrangement mode of fluorescent tube positive-negative polarity, transformer primary side polarity can have different compound modes.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection range of the utility model requirement.
Claims (3)
1, a kind of LCD backlight lighting tube group circuit comprises transformer, fluorescent tube, and it is characterized in that: fluorescent tube is staggered according to polarity of voltage is positive and negative, and Circuit Fault on Secondary Transformer is connected with fluorescent tube, and the transformer of opposed polarity is staggered according to the staggered of light tube electric voltage polarity.
2, LCD backlight lighting tube group circuit according to claim 1, it is characterized in that: described transformer is a primary side polarity difference, and secondary side polarity is identical.
3, LCD backlight lighting tube group circuit according to claim 1, it is characterized in that: described transformer is that primary side polarity is identical, secondary side polarity difference.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200820161999U CN201388327Y (en) | 2008-10-27 | 2008-10-27 | LCD backlight source lamp tube assembly circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200820161999U CN201388327Y (en) | 2008-10-27 | 2008-10-27 | LCD backlight source lamp tube assembly circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201388327Y true CN201388327Y (en) | 2010-01-20 |
Family
ID=41580870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200820161999U Expired - Fee Related CN201388327Y (en) | 2008-10-27 | 2008-10-27 | LCD backlight source lamp tube assembly circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201388327Y (en) |
-
2008
- 2008-10-27 CN CN200820161999U patent/CN201388327Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100120 Termination date: 20131027 |