CN201718076U - Light tube group circuit of LCD backlight - Google Patents
Light tube group circuit of LCD backlight Download PDFInfo
- Publication number
- CN201718076U CN201718076U CN2010202539165U CN201020253916U CN201718076U CN 201718076 U CN201718076 U CN 201718076U CN 2010202539165 U CN2010202539165 U CN 2010202539165U CN 201020253916 U CN201020253916 U CN 201020253916U CN 201718076 U CN201718076 U CN 201718076U
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- connector
- light tube
- light
- fluorescent tube
- circuit
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- Expired - Fee Related
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- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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Abstract
The utility model discloses an improved circuit which can reduce the numbers of light tubes and transformers in a light tube group circuit of prior art backlight comprising a startup circuit board of light tube, a first connector, a second connector, a U-shaped light tube group, a U-shaped connecting plate of light tube, wherein the U-shaped connecting plate of light tube is provided with the second connector and transformers, the latter of which has the same number as that of the U-shaped light tubes in the light tube group; wherein two electrodes of each U-shaped light tube are fixed to the U-shaped connecting plate of light tube; wherein the first connector is fixed to the startup circuit board of light tube, the first connector and the second connector being connected through a group of low-voltage line. The shape of the U-shaped light tube is like two straight light tubes in parallel arrangement. The both the external electrodes are disposed on same side of the light tube. The light source of the U-shaped light tube is equivalent to light source of two straight light tubes. These characteristics makes the utility model herein spares a second connecting plate of light tube and reduce the numbers of light tubes and transformers.
Description
Technical field
The utility model relates to a kind of LCD (LCD) backlight circuit.
Background technology
Referring to the CN200620005223.8 Chinese patent literature, be a kind of form that framework is set of backlight lighting tube group, as shown in Figure 1.The basic composition of this backlight lighting tube group circuit is: the fluorescent tube start-up circuit plate 11 with a control circuit 111 and first connector 112 is connected with the first fluorescent tube connecting plate 12 by one group of low-voltage line 15, be provided with the transformer 122 of fluorescent tube quantity in second connector 121 and the corresponding straight light tube group 14 on the first fluorescent tube connecting plate 12, the required straight light tube group 14 of LCD backlight is erected between the first fluorescent tube connecting plate 12 and the second fluorescent tube connecting plate 13.During circuit working, by first connector 112 that is arranged on the fluorescent tube start-up circuit plate 11, with low-voltage line 15 signal is transferred to first connector 121 that is arranged on the first fluorescent tube connecting plate 12, make this second connector 121 export signal to each transformer 122 to drive 14 work of straight light tube group.During circuit working, by first connector 112 that is arranged on the fluorescent tube start-up circuit plate 11, with low-voltage line 15 signal is transferred to second connector 121 that is arranged on the first fluorescent tube connecting plate 12, make this second connector 121 export signal to each transformer 122 to drive 14 work of straight light tube group.
The framework that is provided with of above-mentioned backlight lighting tube group is also demanded urgently improving on cost control and raising reliability.
The utility model content
Technical scheme to be solved in the utility model is, provides a kind of fluorescent tube quantity and number transformer of reducing in the existing backlight lighting tube group circuit to reach the improvement circuit of same back light source brightness.
The utility model is to solve the problems of the technologies described above the technical scheme that is adopted to be, the light tube group circuit of backlight of LCD, comprise fluorescent tube start-up circuit plate, first connector, second connector, U type light tube group, U type fluorescent tube connecting plate, U type fluorescent tube connecting plate be provided with second connector and with light tube group in the consistent transformer of U type fluorescent tube quantity; Two electrodes of each U type fluorescent tube all are fixed on the U type fluorescent tube connecting plate; First connector is fixed on the fluorescent tube start-up circuit plate, links to each other by one group of low-voltage line between first connector and second connector.
Two outer electrodes that utilize similar two the parallel straight light tubes of shape of U type fluorescent tube and U type fluorescent tube are all in the characteristics of fluorescent tube one side.Use U type fluorescent tube to constitute light tube group, the light source of one of them U type fluorescent tube is equivalent to the light source of two straight light tubes, the framework that is provided with respect to existing backlight lighting tube group, not only save the second fluorescent tube connecting plate, also reduced the usage quantity of fluorescent tube and transformer simultaneously, thereby reduced cost, improved reliability.U type fluorescent tube described in the utility model is U type CCFL (cathode fluorescent tube).
Further, for the flow through electric current of light tube group of active balance, also comprise current transformer, described current transformer is arranged on the U type fluorescent tube connecting plate.
Concrete, including control circuit on the fluorescent tube start-up circuit plate, control circuit is pulse-width modulator or microprocessor.
The beneficial effects of the utility model are to have reduced cost, improved reliability.
Description of drawings
Fig. 1 is the prior art schematic diagram;
Fig. 2 is the embodiment schematic diagram.
Embodiment
LCD backlight lighting tube group circuit after the improvement, as shown in Figure 2, comprise fluorescent tube start-up circuit plate 21, fluorescent tube start-up circuit plate 21 is provided with first connector 212, control circuit 211, first connector 212 links to each other with second connector 221 by one group of low-voltage line, and second connector 221 is arranged on the U type fluorescent tube connecting plate 22.The light tube group 23 that a plurality of U type fluorescent tubes constitute, wherein two electrodes of each U type fluorescent tube all are fixed on the U type fluorescent tube connecting plate 22, also be provided with on the U type fluorescent tube connecting plate 22 and the identical transformer 122 of U type fluorescent tube quantity, for the flow through electric current of light tube group of active balance, on U type fluorescent tube connecting plate 22, also be provided with current transformer 133.
Compare backlight lighting tube group circuit shown in Figure 1, the utility model has saved the second fluorescent tube connecting plate, reduced the cost that the backlight lighting tube group is provided with framework, has increased the reliability that the backlight lighting tube group is provided with framework; The U type fluorescent tube that uses reduced the number transformer on the fluorescent tube connecting plate, reduced the cost that the backlight lighting tube group is provided with framework.
Claims (4)
1. the light tube group circuit of backlight of LCD, it is characterized in that, comprise fluorescent tube start-up circuit plate, first connector, second connector, U type light tube group, U type fluorescent tube connecting plate, U type fluorescent tube connecting plate be provided with second connector and with light tube group in the consistent transformer of U type fluorescent tube quantity; Two electrodes of each U type fluorescent tube all are fixed on the U type fluorescent tube connecting plate; First connector is fixed on the fluorescent tube start-up circuit plate, links to each other by one group of low-voltage line between first connector and second connector.
2. the light tube group circuit of backlight of LCD according to claim 1 is characterized in that also comprise current transformer, described current transformer is arranged on the U type fluorescent tube connecting plate.
3. the light tube group circuit of backlight of LCD as claimed in claim 1 or 2 is characterized in that include control circuit on the fluorescent tube start-up circuit plate, described control circuit is a pulse-width modulator.
4. the light tube group circuit of backlight of LCD as claimed in claim 1 or 2 is characterized in that include control circuit on the fluorescent tube start-up circuit plate, described control circuit is a microprocessor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202539165U CN201718076U (en) | 2010-07-09 | 2010-07-09 | Light tube group circuit of LCD backlight |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202539165U CN201718076U (en) | 2010-07-09 | 2010-07-09 | Light tube group circuit of LCD backlight |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201718076U true CN201718076U (en) | 2011-01-19 |
Family
ID=43464084
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202539165U Expired - Fee Related CN201718076U (en) | 2010-07-09 | 2010-07-09 | Light tube group circuit of LCD backlight |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201718076U (en) |
-
2010
- 2010-07-09 CN CN2010202539165U patent/CN201718076U/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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110119 Termination date: 20150709 |
|
| EXPY | Termination of patent right or utility model |