CN101196643A - Multi-light tube backlight module - Google Patents
Multi-light tube backlight module Download PDFInfo
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- CN101196643A CN101196643A CNA2006101609008A CN200610160900A CN101196643A CN 101196643 A CN101196643 A CN 101196643A CN A2006101609008 A CNA2006101609008 A CN A2006101609008A CN 200610160900 A CN200610160900 A CN 200610160900A CN 101196643 A CN101196643 A CN 101196643A
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- circuit board
- backlight module
- those
- cold cathode
- driving transformer
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Abstract
A backlight module with multiple lighting tubes is provided, which is to integrate the capacitor onto one circuit board mounted beside the LCD panel. The backlight module comprises a drive unit with a drive transformer which provides two output terminals; a backlight unit comprising a circuit board equipped on one side of the LCD panel with at least one capacitor. One of the ends of the capacitors is all connected with an output terminal of the drive transformer; and at least one CCFL (cold cathode florescent lamp) arranged at the back of the LCD panel. One of the ends of another output terminal of the drive transformer and the other ends of the cold cathode florescent lamps are separately connected with another ends of the capacitors.
Description
Technical field
The present invention is a kind of multi-light tube backlight module, refers to especially a kind ofly utilize use that reduces electronic package and the design of simplifying circuit, and reaches the multi-light tube backlight module that reduces cost and have the better electrical mobile equilibrium.
Background technology
General liquid crystal indicator mainly is to comprise a display panels and a backlight module, and wherein backlight module is broadly divided into Staight downward type backlight module and side light type backlight module.
No matter be that the backlight module of which kind of type all needs to drive luminescence unit in the backlight module by at least one drive circuit board, at present Chang Zuowei luminescence unit person is cold cathode fluorescent lamp (CCFL), and is that a high-voltage driven signal that provides via drive circuit board is driven in order to driven for emitting lights unit person.
With reference to figure 1, be known backlit modular circuit synoptic diagram.Known backlit module 1 is to use a plurality of driving driving transformer T1-TN in 1 pair 1 mode, and seeing through capacitor C1-CN respectively provides high-voltage driven signal to cold cathode fluorescent lamp L1-LN, and then promotes cold cathode fluorescent lamp L1-LN.Please cooperate Fig. 1, with reference to figure 2, be that the circuit for Fig. 1 is provided with synoptic diagram.Those drive driving transformer T1-TN and are arranged on the control circuit board 10, all have two output terminals, and the one output terminal is connected in the reference edge in the control circuit board 10 jointly, and the other end then connects the capacitor C1-CN that is arranged on the control circuit board 10 respectively.In the circuit unit configuration of reality, a plurality of splicing ears 12 need be set, on the control circuit board 10 with connecting interface as control circuit board 10 and cold cathode fluorescent lamp L1-LN.At this moment, the high-voltage driven signal of control circuit board 10 output can be sent to cold cathode fluorescent lamp L1-LN and driven via splicing ear 12.
In addition, as shown in Figure 2, when backlight module 1 assembling, must be connected with connecting line 14 between control circuit board 10 and the cold cathode fluorescent lamp L1-LN by high voltage bearing splicing ear 12, so must be by manpower when assembling, in other words promptly being can't automated production.And splicing ear 12 must be high pressure resistant material with connecting line 14, therefore must the cost higher cost.
With reference to figure 3, be known another backlight module circuit diagram.Known backlit module 2 is to use one to drive driving transformer Tr with 1 pair of multimode, and seeing through balance winding L X1-LXN respectively provides high-voltage driven signal to cold cathode fluorescent lamp L1-LN, and then promotes cold cathode fluorescent lamp L1-LN.Cooperating Fig. 3, with reference to figure 4, is that the circuit for Fig. 3 is provided with synoptic diagram.In Fig. 4, be that driving driving transformer Tr1, Tr2 are arranged on the control circuit board 20, drive driving transformer Tr1, Tr2 and all have two output terminals, the one output terminal is connected in the reference edge in the control circuit board 20 jointly, and the other end then connects the balance winding L X1-LXN that is arranged on the control circuit board 20 respectively.In the circuit unit configuration of reality, a plurality of splicing ears 22 need be set, on the control circuit board 20 with connecting interface as control circuit board 20 and cold cathode fluorescent lamp L1-LN.At this moment, the high-voltage driven signal of control circuit board 20 output can be sent to cold cathode fluorescent lamp L1-LN and driven via splicing ear 22.
In addition, as shown in Figure 4, when backlight module 2 assembling, must be connected with connecting line 24 between control circuit board 20 and the cold cathode fluorescent lamp L1-LN by high voltage bearing splicing ear 22, so must be by manpower when assembling, in other words promptly being can't automated production.And splicing ear 22 must be high pressure resistant material with connecting line 24, therefore must the cost higher cost.
Summary of the invention
In view of this, the invention provides a kind of multi-light tube backlight module, is that capacitor is incorporated on the circuit board independently, and this circuit board is arranged at the side of display panels.The configuration mode of this kind circuit unit is the design that can reduce the use of assemblies such as balance winding, splicing ear, connecting line and simplify circuit, reduces cost and has the better electrical mobile equilibrium and reach.
First embodiment of the present invention multi-light tube backlight module is to be applicable to a display panels, and this backlight module includes: a control circuit board, a transformer, a circuit board and at least one cold cathode fluorescent lamp.This transformer is arranged on this control circuit board, and the secondary side of this transformer has one first link and one second link.This circuit board is provided with at least one capacitor, and this circuit board is arranged at a side of this display panels, and an end of those capacitors is connected in this first link of the secondary side of this transformer jointly.Those cold cathode fluorescent lamp are arranged at the back side of this display panels, each cold cathode fluorescent lamp all has one first conducting end and one second conducting end, wherein, those first conducting end are connected to the other end of those capacitors, and those second conducting end are connected in this second link of the secondary side of this transformer jointly.
Second embodiment of the present invention multi-light tube backlight module is to be applicable to a display panels, and this backlight module includes: a control circuit board, a transformer, a first circuit board, a second circuit board and at least one cold cathode fluorescent lamp.This transformer is arranged on this control circuit board, and the secondary side of this transformer has one first link and one second link.This first circuit board is provided with at least one first capacitor, and this first circuit board is arranged at a side of this display panels, and an end of those first capacitors is connected in this first link of the secondary side of this transformer jointly.This second circuit board is provided with at least one second capacitor, and this second circuit board is arranged at the opposite side of this display panels, and an end of those second capacitors is connected in this second link of the secondary side of this transformer jointly.Those cold cathode fluorescent lamp are arranged at the back side of this display panels, each cold cathode fluorescent lamp all has one first conducting end and one second conducting end, wherein, those first conducting end are connected to the other end of those first capacitors, and those second conducting end are connected to the other end of those second capacitors.
Above general introduction and ensuing detailed description are all exemplary in nature, are in order to further specify claim of the present invention.And about other purpose of the present invention and advantage, will be set forth in follow-up explanation and diagram.
Description of drawings
Graphic explanation:
Fig. 1 is a known backlit modular circuit synoptic diagram;
Fig. 2 is provided with synoptic diagram for the circuit of Fig. 1;
Fig. 3 is known another backlight module circuit diagram;
Fig. 4 is provided with synoptic diagram for the circuit of Fig. 3;
Fig. 5 is the backlight module circuit diagram of first embodiment of the invention;
Fig. 6 is provided with synoptic diagram for the circuit of Fig. 5;
Fig. 7 is the backlight module circuit diagram of second embodiment of the invention; And
Fig. 8 is provided with synoptic diagram for the circuit of Fig. 7.
The figure number explanation:
Known technology:
Drive driving transformer T1-TN, Tr, Tr1, Tr2
Capacitor C1-CN
Cold cathode fluorescent lamp L1-LN
Splicing ear 12,22
Connecting line 14,24
Balance winding L X1-LXN
The present invention:
Driving transformer T, Tm
High-voltage capacitance C1-CN, C11-C1N, C21-C2N
Cold cathode fluorescent lamp L1-LN
Control circuit board 300,400
Circuit board 320,420,422
The first link T11
The second link T12
The first conducting end LC1
The second conducting end LC2
Embodiment
Please refer to Fig. 5, be the backlight module circuit diagram of first embodiment of the invention.Backlight module 3 of the present invention is to use a driving transformer T with 1 pair of multimode, seeing through high-voltage capacitance C1-CN respectively provides high-voltage driven signal to cold cathode fluorescent lamp L1-LN, and then promote cold cathode fluorescent lamp L1-LN, be to be applicable to a display panels (not indicating).
Cooperating Fig. 5, with reference to figure 6, is that the circuit for Fig. 5 is provided with synoptic diagram.In Fig. 6, backlight module 3 of the present invention has comprised driver element 30 and back light unit 32, and driver element 30 comprises a control circuit board 300 and a driving transformer T, and back light unit 32 comprises a circuit board 320 and at least one cold cathode fluorescent lamp L1-LN.This driving transformer T is arranged on this control circuit board 300, and the secondary side of this driving transformer T has one first link T11 and one second link T12.This circuit board 320 is provided with at least one capacitor C1-CN, and this circuit board 320 is arranged at a side of this display panels (indicate), and the end of those capacitors C1-CN is connected in this first link T11 of the secondary side of this driving transformer T jointly.Those cold cathode fluorescent lamp L1-LN is arranged at the back side of this display panels, each cold cathode fluorescent lamp all has one first conducting end LC1 and one second conducting end LC2, wherein, those first conducting end LC1 is connected to the other end of those capacitors C1-CN, and those second conducting end LC2 is connected in this second link T12 of the secondary side of this driving transformer T jointly.
Multiple with reference to figure 6, in the driver element 30 of backlight module 3, drive driving transformer T and be arranged on the control circuit board 300, and two output link T11, T12 are provided on control circuit board 300, to export high-voltage driven signal to back light unit 32.In back light unit 32, the circuit board 320 that is provided with capacitor C1-CN is positioned over a side of display panels (not indicating), the end of those capacitors C1-CN is connected in this first link T11 of the secondary side of this driving transformer T jointly, and the first conducting end LC1 that is arranged at those cold cathode fluorescent lamp L1-LN at this display panels back side then is connected to the other end of capacitor C1-CN.The second conducting end LC2 of those cold cathode fluorescent lamp L1-LN then is connected in this second link T12 of the secondary side of this driving transformer T jointly.
Multiple with reference to figure 6, the backlight module 3 of first embodiment of the invention, in the configuration of the circuit unit of reality, driver element 30 only provides the first link T11 and the second link T12 to be connected in the back light unit 32 the connecing altogether of end a and cold cathode fluorescent lamp L1-LN that connect altogether of circuit board 320 and holds b.
Therefore, when the backlight module 3 of assembling first embodiment of the invention, only need be connected two high-voltage conducting wires between driver element 30 and the back light unit 32 and promptly can finish assembling, and the waste of having saved manpower.Simultaneously, because driver element 30 only connects with two leads and back light unit 32, therefore the backlight module 3 of first embodiment of the invention just need not extra a plurality of high voltage bearing splicing ears and connecting line, and the cost of having saved those assemblies, and then reduce manufacturing cost.
In addition, because the backlight module 3 of first embodiment of the invention is an end that the capacitor C1-CN of high pressure is serially connected with each cold cathode fluorescent lamp L1-LN, therefore, the working current that flows through each cold cathode fluorescent lamp L1-LN can reach balance along with identical high-voltage capacitance value, and need not to be provided with extra balance winding in driver element 40, can save the cost of balance winding equally, and reduce manufacturing cost.
Please refer to Fig. 7, be the backlight module circuit diagram of second embodiment of the invention.It is with 1 pair of multimode that backlight module 4 of the present invention is to use a driving driving transformer Tm, seeing through high-voltage capacitance C1-CN respectively provides two high-voltage driven signals to cold cathode fluorescent lamp L1-LN, and then promote cold cathode fluorescent lamp L1-LN, be to be applicable to a display panels (not indicating).
Cooperating Fig. 7, with reference to figure 8, is that the circuit for Fig. 7 is provided with synoptic diagram.In Fig. 8, backlight module 4 of the present invention has comprised driver element 40 and back light unit 42, driver element 40 comprises a control circuit board 400 and a driving transformer Tm, and back light unit 42 comprises a first circuit board 420, a second circuit board 422 and at least one cold cathode fluorescent lamp L1-LN.This driving transformer Tm is arranged on this control circuit board 400, and the secondary side of this driving transformer Tm has one first link T11 and one second link T12.This first circuit board 420 is provided with at least one first capacitor C11-C1N, this first circuit board 420 is arranged at a side of this display panels, and the end of those first capacitors C11-C1N is connected in this first link T11 of the secondary side of this driving transformer Tm jointly.This second circuit board 422 is provided with at least one second capacitor C21-C2N, this second circuit board 422 is arranged at the opposite side of this display panels, and the end of those second capacitors C21-C2N is connected in this second link T12 of the secondary side of this driving transformer Tm jointly.Those cold cathode fluorescent lamp L1-LN is arranged at the back side of this display panels, each cold cathode fluorescent lamp all has one first conducting end LC1 and one second conducting end LC2, wherein, those first conducting end LC1 is connected to the other end of those first capacitors C11-C1N, and those second conducting end LC2 is connected to the other end of those second capacitors C21-C2N.
Multiple with reference to figure 8, the backlight module 4 of second embodiment of the invention, in the configuration of the circuit unit of reality, driver element 40 only provides the first link T11 and the second link T12 to be connected in the back light unit 42 the connecing altogether of end a and second circuit board 422 that connect altogether of first circuit board 420 and holds b.
Therefore, when the backlight module 4 of assembling second embodiment of the invention, only need be connected two high-voltage conducting wires between driver element 40 and the back light unit 42 and promptly can finish assembling, and the waste of having saved manpower.Simultaneously, because driver element 40 only connects with two leads and back light unit 42, therefore the backlight module 4 of second embodiment of the invention just need not extra a plurality of high voltage bearing splicing ears and connecting line, and the cost of having saved those assemblies, and then reduce manufacturing cost.
In addition, because the backlight module 4 of second embodiment of the invention is two ends that the first capacitor C11-C1N and the second capacitor C21-C2N with high pressure is serially connected with each cold cathode fluorescent lamp L1-LN, therefore, the working current that flows through each cold cathode fluorescent lamp L1-LN can reach balance along with identical high-voltage capacitance value, and need not to be provided with extra balance winding in driver element 40, can save the cost of balance winding equally, and reduce manufacturing cost.
But, the above, only for the detailed description of the specific embodiment of one of the best of the present invention with graphic, anyly be familiar with this operator in the field of the invention, can think easily and variation or modification all can be encompassed in the claim of this case.
Claims (10)
1. a multi-light tube backlight module is characterized in that, is applicable to a display panels, and this backlight module includes:
One control circuit board;
One driving transformer has a secondary side, and this driving transformer is arranged on this control circuit board, and the secondary side of this driving transformer has one first link and one second link;
One circuit board, it is provided with at least one capacitor, and this circuit board is arranged at a side of this display panels, and an end of those capacitors is connected in this first link of the secondary side of this driving transformer jointly; And
At least one cold cathode fluorescent lamp, be arranged at the back side of this display panels, each cold cathode fluorescent lamp all has one first conducting end and one second conducting end, wherein, those first conducting end are connected to the other end of those capacitors, and those second conducting end are connected in this second link of the secondary side of this driving transformer jointly.
2. multi-light tube backlight module as claimed in claim 1 is characterized in that, this capacitor is a high-voltage capacitor.
3. a multi-light tube backlight module is characterized in that, is applicable to a display panels, and this backlight module includes:
One control circuit board;
One driving transformer has a secondary side, and this driving transformer is arranged on this control circuit board, and the secondary side of this driving transformer has one first link and one second link;
One first circuit board, it is provided with at least one first capacitor, and this first circuit board is arranged at a side of this display panels, and an end of those first capacitors is connected in this first link of the secondary side of this driving transformer jointly;
One second circuit board, it is provided with at least one second capacitor, and this second circuit board is arranged at the opposite side of this display panels, and an end of those second capacitors is connected in this second link of the secondary side of this driving transformer jointly; And
At least one cold cathode fluorescent lamp, be arranged at the back side of this display panels, each cold cathode fluorescent lamp all has one first conducting end and one second conducting end, wherein, those first conducting end are connected to the other end of those first capacitors, and those second conducting end are connected to the other end of those second capacitors.
4. multi-light tube backlight module as claimed in claim 3 is characterized in that, this capacitor is a high-voltage capacitor.
5. multi-light tube backlight module as claimed in claim 3 is characterized in that, this driving transformer provides two those cold cathode fluorescent lamp of high drive.
6. a multi-light tube backlight module is characterized in that, is applicable to a display panels, and this backlight module includes:
One driver element, it is provided with a driving transformer, and this driving transformer provides two output terminals;
One back light unit comprises:
One circuit board is arranged at a side of this display panels, and this circuit board is provided with at least
One capacitor, an end of those capacitors is connected in an output terminal of this driving transformer jointly;
And
At least one cold cathode fluorescent lamp is arranged at the back side of this display panels, and an end of those cold cathode fluorescent lamp is connected in another output terminal of this driving transformer jointly, and the other end of those cold cathode fluorescent lamp is connected to the other end of those electric capacity.
7. multi-light tube backlight module as claimed in claim 6 is characterized in that, this capacitor is a high-voltage capacitor.
8. a multi-light tube backlight module is characterized in that, is applicable to a display panels, and this backlight module includes:
One driver element, it is provided with a driving transformer, and this transformer provides two output terminals;
One back light unit comprises:
At least one cold cathode fluorescent lamp is arranged at the back side of this display panels;
And
Two circuit boards, be arranged at two sides of this display panels respectively, this two circuit board is provided with at least one capacitor, one end of those capacitors on this two circuit board is connected to two output terminals of this driving transformer, and the other end of those capacitors on this two circuit board is connected to those cold cathode fluorescent lamp.
9. multi-light tube backlight module as claimed in claim 8 is characterized in that, this capacitor is a high-voltage capacitor.
10. multi-light tube backlight module as claimed in claim 8 is characterized in that, this driving transformer provides two those cold cathode fluorescent lamp of high drive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101609008A CN101196643A (en) | 2006-12-08 | 2006-12-08 | Multi-light tube backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101609008A CN101196643A (en) | 2006-12-08 | 2006-12-08 | Multi-light tube backlight module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101196643A true CN101196643A (en) | 2008-06-11 |
Family
ID=39547137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006101609008A Pending CN101196643A (en) | 2006-12-08 | 2006-12-08 | Multi-light tube backlight module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101196643A (en) |
-
2006
- 2006-12-08 CN CNA2006101609008A patent/CN101196643A/en active Pending
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |