CN201197214Y - Light tube driving device - Google Patents
Light tube driving device Download PDFInfo
- Publication number
- CN201197214Y CN201197214Y CNU2008200087630U CN200820008763U CN201197214Y CN 201197214 Y CN201197214 Y CN 201197214Y CN U2008200087630 U CNU2008200087630 U CN U2008200087630U CN 200820008763 U CN200820008763 U CN 200820008763U CN 201197214 Y CN201197214 Y CN 201197214Y
- Authority
- CN
- China
- Prior art keywords
- signal
- transducer
- direct current
- drive unit
- type balanced
- 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
Links
Images
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
The utility model discloses a drive unit for a lighting tube, which is used for driving a backlight module and a mainboard. The drive unit comprises a first converter, a second converter, a third converter and a plurality of first balanced converters, wherein the first converter is used for receiving a first alternating-current signal and converting the first alternating-current signal into a first direct-current signal; the second converter is used for converting the first direct-current signal into a second direct-current signal and outputting the second direct-current signal to the mainboard so as to drive the mainboard; the third converter is used for converting the first direct-current signal into a second alternating-current signal; and the various balanced converters are used for driving the backlight module and balancing the current of at least one luminous unit in the backlight module according to the second alternating-current signal.
Description
Technical field
The utility model relates to a kind of drive unit, especially relates to a kind of drive unit that can drive backlight module and motherboard simultaneously.
Background technology
In recent years, along with the size of panel of LCD constantly increases, the high-quality light source that provides display panels required is provided the backlight module that comprises a plurality of fluorescent tubes more widely.Stable and luminous uniformly in order to keep panel of LCD, the improvement of drive unit just becomes the emphasis problem of panel of LCD development.
In traditional panel of LCD, the structure of drive circuit mainly is divided into two parts: power panel (power board) and hardboard (inverter board).Power panel is in order to drive the motherboard of panel of LCD, and hardboard is then luminous in order to drive backlight module.
Please refer to Fig. 1, Fig. 1 shows the schematic diagram of driving circuit structure 1 of the panel of LCD of prior art.As shown in Figure 1, driving circuit structure 1 comprises power panel 10 and hardboard 12.The AC/DC transducer 100 of power panel 10 receives AC power P, and converts thereof into DC power supply output, and wherein, the voltage range of this DC power supply is about 360～400 volts (V).DC/DC transducer 102 receives the DC power supply of output, and DC power supply is converted to the required DC power supply of the motherboard 14 of panel of LCD and exports motherboard 14 to, and the required DC power supply size of motherboard is according to different types of motherboard and different.On the other hand, the DC power supply that DC/DC transducer 102 also will be received from AC/DC transducer 100 converts one to and exports hardboard 12 to than the DC power supply of low pressure and with this low-voltage dc power supply, and wherein, this low-voltage dc power supply has about 24 volts voltage.The DC/AC transducer of hardboard 12 will convert high-voltage ac power than the DC power supply of low pressure to drive backlight module 16, and the voltage range of this high-voltage ac power is about 800～1400 volts.
In above-mentioned driving circuit structure 1, the low-voltage DC source signal that the hardboard 10 of driving backlight module is received convert via two transducers, so the power loss of driving circuit structure 1 is higher, relatively causes power supply to provide efficient to reduce.
The utility model content
A category of the present utility model is to provide a kind of drive unit, can drive backlight module and motherboard simultaneously, to address the above problem.
According to a specific embodiment, drive unit of the present utility model can be in order to drive backlight module and motherboard, and this drive unit comprises: first transducer, second transducer, the 3rd transducer and a plurality of inductance type balanced to unbalanced transformer.First AC signal that is provided by AC power can be provided first transducer, and converts first AC signal to first direct current signal.Convertible first direct current signal of second transducer becomes second direct current signal, and export second direct current signal to motherboard with the driving host plate.Convertible first direct current signal of the 3rd transducer becomes second AC signal.The inductance type balanced to unbalanced transformer then can receive second AC signal respectively, and the electric current of and balance each luminescence unit luminous according to each luminescence unit in second AC signal driving backlight module.
According to another specific embodiment, drive unit of the present utility model further comprises a bus except each unit with the foregoing description.Second direct current signal that first transducer is changed out may be output to bus.Second transducer and the 3rd transducer all receive second direct current signal by bus.
According to another specific embodiment, drive unit of the present utility model can be in order to drive backlight module and motherboard, and this drive unit comprises: first transducer, second transducer, the 3rd transducer and a plurality of condenser type balanced to unbalanced transformer.The function of first transducer of this specific embodiment, second transducer and the 3rd transducer is all identical with a last specific embodiment, does not repeat them here.In addition, the drive unit of this specific embodiment further comprises a bus, and second direct current signal that first transducer is changed out may be output to bus, and second transducer and the 3rd transducer all receive second direct current signal by bus.The condenser type balanced to unbalanced transformer can receive second AC signal respectively, and the electric current of and balance each luminescence unit luminous according to each luminescence unit in second AC signal driving backlight module.
According to another specific embodiment, drive unit of the present utility model can be in order to drive backlight module and motherboard, and this drive unit comprises: first transducer, second transducer, the 3rd transducer and a plurality of inductance type balanced to unbalanced transformer.The function of first transducer of this specific embodiment, second transducer and the 3rd transducer is all identical with above-mentioned specific embodiment, does not repeat them here.Similarly, the drive unit of this specific embodiment further comprises a bus, and second direct current signal that first transducer is changed out may be output to bus, and second transducer and the 3rd transducer all receive second direct current signal by bus.The inductance type balanced to unbalanced transformer can receive second AC signal respectively, and each inductance type balanced to unbalanced transformer can drive the electric current of luminous and each luminescence unit of balance of at least two luminescence units in the backlight module according to second AC signal.
Can be further understood by following utility model detailed description and accompanying drawing about advantage of the present utility model and spirit.
Description of drawings
Fig. 1 shows the schematic diagram of driving circuit structure of the panel of LCD of prior art.
Fig. 2 shows according to the drive unit driving host plate of a specific embodiment of the present utility model and the schematic diagram of backlight module.
Fig. 3 shows according to the drive unit driving host plate of another specific embodiment of the present utility model and the schematic diagram of backlight module.
Fig. 4 shows according to the drive unit driving host plate of a specific embodiment of the present utility model and the schematic diagram of backlight module.
Fig. 5 shows according to the drive unit driving host plate of another specific embodiment of the present utility model and the schematic diagram of backlight module.
Fig. 6 shows according to the drive unit 5 driving host plates of a specific embodiment of the present utility model and the schematic diagram of backlight module.
The reference numeral explanation
1: driving circuit structure 10: power panel
12: high-voltage device 100:AC/DC transducer
102:DC/DC transducer 120:DC/AC transducer
14: motherboard: 16: backlight module
P: AC power 2,2 ', 5: drive unit
20,20 ', 50: the first transducers 22,22 ', 52: the second transducers
24,24 ', 54: the three transducers
26,56: the inductance type balanced to unbalanced transformer
26 ': the condenser type balanced to unbalanced transformer
262: the first inductance type balanced to unbalanced transformers
264: the second inductance type balanced to unbalanced transformers
262 ': the first condenser type balanced to unbalanced transformer
264 ': the second condenser type balanced to unbalanced transformer
28,28 ', 58: bus
40,40 ', 70: the first AC signal
42,42 ', 72: the first direct current signals
44,44 ', 74: the second direct current signals
460,462,460 ', 462 ', 760,762: the second AC signal
30,30 ', 60: motherboard 32,32 ', 62: backlight module
320,320 ', 620: luminescence unit 260,260 ', 560: feedback circuit
48,78: feedback signal 64: electric capacity
Embodiment
Please refer to Fig. 2, Fig. 2 shows according to the drive unit 2 driving host plates 30 of a specific embodiment of the present utility model and the schematic diagram of backlight module 32.As shown in Figure 2, drive unit 2 comprises first transducer 20, second transducer 22, the 3rd transducer 24 and a plurality of inductance type balanced to unbalanced transformer 26.
In this specific embodiment, first transducer 20 receives first AC signal 40, in practice, normally provides first AC signal 40 to first transducers 20 with an AC power.After first transducer 20 receives first AC signal 40, convert first AC signal 40 to first direct current signal 42, and export first direct current signal 42 to second transducer 22 and the 3rd transducer 24.In this specific embodiment, drive unit 2 can further comprise bus 28, after first transducer 20 receives first AC signal 40 and converts thereof into first direct current signal 42, import first direct current signal 42 to bus 28, second transducer 22 and the 3rd transducer 24 receive first direct current signal 42 by bus 28 again.In practice, first transducer 20 also can directly be exported first direct current signal, 42 to second transducers 22 and the 3rd transducer 24, and without bus 28.
In actual applications, first transducer 20 can comprise rectifier and power factor corrector, wherein, rectifier can be bridge rectifier, push-pull rectifier or other rectifier that is fit to of full-bridge type or semibridge system, need decide on user or designer's demand.In addition, in actual applications, first AC signal 40 is imported first transducer 20 after can be earlier considering ripple device (EMI filter) filtering via electromagnetic interference again, and the voltage range of first AC signal 30 can be 100～240 volts (V) with and frequency range can be 47～63 hertz (Hz).In addition, first direct current signal 42 can be about 400 volts DC power supply.
In this specific embodiment, second transducer 22 can be converted into second direct current signal 44 with first direct current signal 42, and exports motherboard 30 to driving host plate 30.In actual applications, second transducer 22 can be adjusted second direct current signal 44 according to the kind of motherboard 30 and causes second direct current signal 44 to have different frequencies and voltage.
On the other hand, 24 of the 3rd transducers can convert first direct current signal 42 to second AC signal 460,462, and export inductance type balanced to unbalanced transformer 26 to.Each inductance type balanced to unbalanced transformer 26 couples an end of the luminescence unit 320 in the backlight module 32, and therefore, it is luminous that inductance type balanced to unbalanced transformer 26 can drive each luminescence unit 320 by second AC signal 460,462.In addition, in this specific embodiment, couple mutually between each inductance type balanced to unbalanced transformer 26 and form a loop, the electric current of 320 of each luminescence units of balance further makes the luminosity of each luminescence unit 320 close by this.
In this specific embodiment, the polarity of second AC signal 460 is different from the polarity of second AC signal 462, yet also can use in actual applications, second AC signal of single polarity according to the circuit arrangement difference of backlight module 32 and inductance type balanced to unbalanced transformer 26.In addition, in actual applications, aforesaid luminescence unit 320 can be, but not be subject to fluorescent tube.
In addition, in this specific embodiment, each inductance type balanced to unbalanced transformer 26 couples formed loop mutually can further couple feedback circuit 260, and feedback circuit 260 can transmit feedback signal 48 to the 3rd transducers 24 according to each inductance type balanced to unbalanced transformer 26 formed loop.The 3rd transducer 24 can control and adjust the parameters such as voltage, electric current or frequency of second AC signal 460,462 according to feedback signal 48.In actual applications, more approaching by the electric current that this FEEDBACK CONTROL can make each luminescence unit 320 be received, and also can further protect integrated circuit.
Please refer to Fig. 3, Fig. 3 shows according to the drive unit 2 driving host plates 30 of another specific embodiment of the present utility model and the schematic diagram of backlight module 32.As shown in Figure 3, the drive unit 2 and a last specific embodiment of this specific embodiment do not exist together, and are that the drive unit 2 of this specific embodiment has a plurality of first inductance type balanced to unbalanced transformers 262 and a plurality of second inductance type balanced to unbalanced transformer 264.
As shown in Figure 3, each first inductance type balanced to unbalanced transformer 262 couples an end of each luminescence unit 320, as the inductance type balance adapter 26 among Fig. 2.On the other hand, each second inductance type balance adapter 264 couples the other end of each luminescence unit 320.The first inductance type balance adapter 262 and the second inductance type balance adapter 264 can receive second AC signal 460,462 respectively, and it is luminous to use each luminescence unit 320 of driving.
Similarly, in this specific embodiment, the polarity of second AC signal 460 is different from the polarity of second AC signal 462, in actual applications, also can use second AC signal of single polarity according to the circuit arrangement difference of backlight module 32, the first inductance type balanced to unbalanced transformer 262 and the second inductance type balanced to unbalanced transformer 264.In addition, in actual applications, aforesaid luminescence unit 320 can be, but not be subject to fluorescent tube.
In addition, in this specific embodiment, couple mutually between each the first inductance type balanced to unbalanced transformer 262 and the second inductance type balanced to unbalanced transformer 264 and form a loop, the electric current of 320 of each luminescence units of balance further makes the luminosity of each luminescence unit 320 close by this.The first inductance type balanced to unbalanced transformer 262 and the second inductance type balanced to unbalanced transformer 264 couple formed loop mutually can further couple feedback circuit 266, and feedback circuit 266 can transmit feedback signal 48 to the 3rd transducers 24 according to this loop.The 3rd transducer 24 can control and adjust the parameters such as voltage, electric current or frequency of second AC signal 460,462 according to feedback signal 48.In actual applications, more approaching by the electric current that this kind FEEDBACK CONTROL can make each luminescence unit 320 be received, and also can further protect integrated circuit.
Please refer to Fig. 4, Fig. 4 shows according to drive unit 2 ' the driving host plate 30 ' of a specific embodiment of the present utility model and the schematic diagram of backlight module 32 '.As shown in Figure 4, drive unit 2 ' comprises first transducer 20 ', second transducer 22 ', the 3rd transducer 24 ' and a plurality of condenser type balanced to unbalanced transformer 26 '.
In this specific embodiment, first transducer 20 ' receives first AC signal 40 '.After first transducer 20 ' receives first AC signal 40 ', convert first AC signal 40 ' to first direct current signal 42 ', and export first direct current signal 42 ' to second transducer 22 ' and the 3rd transducer 24 '.In this specific embodiment, drive unit 2 ' can further comprise bus 28 ', after first transducer 20 ' receives first AC signal 40 ' and converts thereof into first direct current signal 42 ', import first direct current signal 42 ' to bus 28 ', second transducer 22 ' and the 3rd transducer 24 ' receive first direct current signal 42 ' by bus 28 ' again.
In this specific embodiment, second transducer 22 ' can be converted into second direct current signal 44 ' with first direct current signal 42 ', and exports motherboard 30 ' to driving host plate 40 '.On the other hand, the 3rd transducer 24 ' then can convert first direct current signal 42 ' to second AC signal 460 ', 462 ', and exports condenser type balanced to unbalanced transformer 26 ' to.Each condenser type balanced to unbalanced transformer 26 ' couples an end of the luminescence unit 320 ' in the backlight module 32 ', and therefore, it is luminous that condenser type balanced to unbalanced transformer 26 ' can drive each luminescence unit 320 ' by second AC signal 460 ', 462 '.By condenser type balanced to unbalanced transformer 26 ', drive unit 2 ' can equiulbrium flow be crossed the electric current of each luminescence unit 320 ', causes the luminosity of each luminescence unit 320 ' close.
In this specific embodiment, the polarity of second AC signal 460 ' is different from the polarity of second AC signal 462 ', yet also can use in actual applications, second AC signal of single polarity according to the circuit arrangement difference of backlight module 32 ' and inductance type balanced to unbalanced transformer 26 '.
Please refer to Fig. 5, Fig. 5 shows according to drive unit 2 ' the driving host plate 30 ' of another specific embodiment of the present utility model and the schematic diagram of backlight module 32 '.As shown in Figure 5, the drive unit 2 ' and a last specific embodiment of this specific embodiment do not exist together, and are that the drive unit 2 ' of this specific embodiment has a plurality of first condenser type balanced to unbalanced transformers 262 ' and a plurality of second condenser type balanced to unbalanced transformer 264 '.
In this specific embodiment, each first condenser type balanced to unbalanced transformer 262 ' couples an end of each luminescence unit 320 ', as the condenser type balance adapter 26 ' among Fig. 4.On the other hand, each second condenser type balance adapter 264 ' couples the other end of each luminescence unit 320 '.Please note, the first condenser type balance adapter 262 ' of this specific embodiment can receive second AC signal 460 ' respectively, and the second condenser type balance adapter 264 ' can receive second AC signal 462 ' respectively, and it is luminous to drive each luminescence unit 320 ' by this.
Please refer to Fig. 6, Fig. 6 shows according to the drive unit 5 driving host plates 60 of a specific embodiment of the present utility model and the schematic diagram of backlight module 62.As shown in Figure 6, the drive unit 5 of this specific embodiment comprises first transducer 50, second transducer 52, the 3rd transducer 54 and a plurality of inductance type balanced to unbalanced transformer 56.
In this specific embodiment, first transducer 50 receives first AC signal 70, and exports bus 58 to after converting first AC signal 70 to first direct current signal 72.Second transducer 52 and the 3rd transducer 54 can receive first direct current signal 72 by bus 58.
Then, second transducer 52 can be converted into second direct current signal 74 with first direct current signal 72, and exports motherboard 60 to driving host plate 60.On the other hand, 54 of the 3rd transducers can convert first direct current signal 72 to second AC signal 760,762, and export inductance type balanced to unbalanced transformer 56 to.
In this specific embodiment, each inductance type balanced to unbalanced transformer 56 couples an end of two luminescence units 620 in the backlight module 62, and therefore, it is luminous that inductance type balanced to unbalanced transformer 56 can drive each luminescence unit 620 by second AC signal 760,762.In addition, in this specific embodiment, couple mutually between each inductance type balanced to unbalanced transformer 56 and form a loop, the electric current of 620 of each luminescence units of balance further makes the luminosity of each luminescence unit 620 close by this.Note that in actual applications each inductance type balanced to unbalanced transformer 56 can couple an end of a plurality of luminescence units 620, the quantity system that it couples decides according to user or designer's demand, is not limited to the cited specific embodiment of this specification.
In this specific embodiment, each inductance type balanced to unbalanced transformer 56 couples mutually and forms a loop, and the electric current of 620 of each luminescence units of balance further makes the luminosity of each luminescence unit 320 close by this.Inductance type balanced to unbalanced transformer 56 couples formed loop mutually can further couple feedback circuit 560, and feedback circuit 560 can transmit feedback signal 78 to the 3rd transducers 54 according to this loop.The 3rd transducer 54 can control and adjust the parameters such as voltage, electric current or frequency of second AC signal 760,762 according to feedback signal 78.In addition, the other end of each luminescence unit 620 can coupling capacitance 64, and the electric current of each luminescence unit 320 of balance further makes the luminosity of each luminescence unit 620 close by this.
Compared to prior art, drive unit of the present utility model can drive the motherboard and the backlight module of panel of LCD simultaneously.Because its input power supply signal of transducer that drives backlight module is via once converting, in prior art, the input power supply signal that obtains via twice conversion, its power loss of drive unit of the present utility model and power supply device is lower, and therefore having higher power supply provides efficient.In addition, in conjunction with inductance type or condenser type balanced to unbalanced transformer circuit structure, further the electric current of each luminescence unit in the balance backlight module causes backlight module stable and luminous equably.
By the above detailed description of preferred embodiments, hope can be known description feature of the present utility model and spirit more, and is not to come category of the present utility model is limited with above-mentioned disclosed preferred embodiment.On the contrary, its objective is that hope can contain in the category that is arranged in claim of the present utility model of various changes and tool equality.Therefore, the category of claim of the present utility model should be done the broadest explanation according to above-mentioned explanation, contains the arrangement of all possible change and tool equality to cause it.
Claims (19)
1. drive unit, is characterized in that this drive unit comprises in order to drive a backlight module and a motherboard:
One first transducer in order to receiving one first AC signal, and converts this first AC signal to one first direct current signal;
One second transducer, in order to converting this first direct current signal to one second direct current signal, and export this second direct current signal to this motherboard to drive this motherboard;
One the 3rd transducer is in order to convert this first direct current signal to the output of one second AC signal; And
A plurality of first inductance type balanced to unbalanced transformers, receive this second AC signal respectively, it is luminous to drive this luminescence unit that the described first inductance type balanced to unbalanced transformer couples one first end of a luminescence unit of this backlight module respectively, and the described first inductance type balanced to unbalanced transformer balance electric current of this luminescence unit respectively.
2. drive unit as claimed in claim 1 is characterized in that, further comprises:
One bus in order to receiving this first direct current signal, and is sent to this second transducer and the 3rd transducer with this first direct current signal.
3. drive unit as claimed in claim 1 is characterized in that, wherein this second AC signal comprises the wherein one at least of positive voltage high-voltage AC signal and negative voltage high-voltage AC signal.
4. drive unit as claimed in claim 1, it is characterized in that, the wherein said first inductance type balanced to unbalanced transformer forms a loop, this loop further couples a feedback circuit and transmits a feedback signal to the 3rd transducer by this feedback circuit, causes the 3rd transducer to change this second AC signal according to this feedback signal.
5. drive unit as claimed in claim 1, it is characterized in that, further comprise a plurality of second inductance type balanced to unbalanced transformers, the described second inductance type balanced to unbalanced transformer receives this second AC signal respectively, and one second end of this luminescence unit that couples this backlight module respectively is luminous to drive this luminescence unit, and the described second inductance type balanced to unbalanced transformer balance is the electric current of this luminescence unit respectively.
6. drive unit as claimed in claim 5 is characterized in that, wherein this second AC signal comprises the wherein one at least of positive voltage high-voltage AC signal and negative voltage high-voltage AC signal.
7. drive unit as claimed in claim 5, it is characterized in that, wherein said first inductance type balanced to unbalanced transformer and the described second inductance type balanced to unbalanced transformer form a loop, this loop further couples a feedback circuit and transmits a feedback signal to the 3rd transducer by this feedback circuit, causes the 3rd transducer to change this secondary signal according to this feedback signal.
8. drive unit, is characterized in that this drive unit comprises in order to drive a backlight module and a motherboard:
One first transducer in order to receiving one first AC signal, and converts this first AC signal to one first direct current signal;
One second transducer, in order to converting this first direct current signal to one second direct current signal, and export this second direct current signal to this motherboard to drive this motherboard;
One the 3rd transducer is in order to convert this first direct current signal to the output of one second AC signal; And
A plurality of first condenser type balanced to unbalanced transformers, receive this second AC signal respectively, it is luminous to drive this luminescence unit that the described first condenser type balanced to unbalanced transformer couples one first end of a luminescence unit of this backlight module respectively, and the described first condenser type balanced to unbalanced transformer balance electric current of this luminescence unit respectively.
9. drive unit as claimed in claim 8 is characterized in that, further comprises:
One bus in order to receiving this first direct current signal, and is sent to this second transducer and the 3rd transducer with this first direct current signal.
10. drive unit as claimed in claim 8 is characterized in that, wherein this second AC signal comprises the wherein one at least of positive voltage high-voltage AC signal and negative voltage high-voltage AC signal.
11. drive unit as claimed in claim 8, it is characterized in that, the wherein said first condenser type balanced to unbalanced transformer forms a loop, this loop further couples a feedback circuit and transmits a feedback signal to the 3rd transducer by this feedback circuit, causes the 3rd transducer to change this secondary signal according to this feedback signal.
12. drive unit as claimed in claim 8, further comprise a plurality of second condenser type balanced to unbalanced transformers, it is characterized in that, the described second condenser type balanced to unbalanced transformer receives this second AC signal respectively, and one second end of this luminescence unit that couples this backlight module respectively is luminous to drive this luminescence unit, and the described second condenser type balanced to unbalanced transformer balance is the electric current of this luminescence unit respectively.
13. drive unit as claimed in claim 12 is characterized in that, wherein this second AC signal comprises the wherein one at least of positive voltage high-voltage AC signal and negative voltage high-voltage AC signal.
14. drive unit as claimed in claim 12, it is characterized in that, wherein said first condenser type balanced to unbalanced transformer and the described second condenser type balanced to unbalanced transformer form a loop circuit, this loop circuit further couples a feedback circuit and transmits a feedback signal to the 3rd transducer by this feedback circuit, causes the 3rd transducer to change this secondary signal according to this feedback signal.
15. a drive unit, is characterized in that this drive unit comprises in order to drive a backlight module and a motherboard:
One first transducer in order to receiving one first AC signal, and converts this first AC signal to one first direct current signal;
One second transducer, in order to converting this first direct current signal to one second direct current signal, and export this second direct current signal to this motherboard to drive this motherboard;
One the 3rd transducer is in order to convert this first direct current signal to the output of one second AC signal; And
A plurality of inductance type balanced to unbalanced transformers receive this second AC signal respectively, and described inductance type balanced to unbalanced transformer couples at least two luminescence units of this backlight module respectively, and the described inductance type balanced to unbalanced transformer balance electric current of this luminescence unit respectively.
16. drive unit as claimed in claim 15 is characterized in that, further comprises:
One bus in order to receiving this first direct current signal, and is sent to this second transducer and the 3rd transducer with this first direct current signal.
17. drive unit as claimed in claim 15 is characterized in that, wherein this second AC signal comprises the wherein one at least of positive voltage high-voltage AC signal and negative voltage high-voltage AC signal.
18. drive unit as claimed in claim 15, it is characterized in that, the wherein said first inductance type balanced to unbalanced transformer forms a loop, this loop further couples a feedback circuit and transmits a feedback signal to the 3rd transducer by this feedback circuit, causes the 3rd transducer to change this secondary signal according to this feedback signal.
19. drive unit as claimed in claim 15 is characterized in that, wherein respectively this luminescence unit couples an electric capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200087630U CN201197214Y (en) | 2008-04-03 | 2008-04-03 | Light tube driving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200087630U CN201197214Y (en) | 2008-04-03 | 2008-04-03 | Light tube driving device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201197214Y true CN201197214Y (en) | 2009-02-18 |
Family
ID=40416841
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200087630U Expired - Fee Related CN201197214Y (en) | 2008-04-03 | 2008-04-03 | Light tube driving device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201197214Y (en) |
-
2008
- 2008-04-03 CN CNU2008200087630U patent/CN201197214Y/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102186291B (en) | Driving circuit structure | |
| US7492107B2 (en) | Device for driving light source module | |
| CN101511136A (en) | Current balance power supply circuit of multi-group light-emitting diode | |
| CN111327205B (en) | Integrated conversion equipment of vehicle mounted power | |
| CN101801129A (en) | LED low-power drive circuit and LED lamp | |
| CN104113958B (en) | Light emitting diode driving device | |
| CN203193980U (en) | Drive circuit for multi-channel dimmable LED (light-emitting diode) lamp tube | |
| US20100213862A1 (en) | Light source driving device | |
| CN1886021B (en) | Multi lamp tube driving system | |
| CN201439885U (en) | High-power LED illuminating system | |
| CN112019783B (en) | Television power supply and split type television | |
| CN103745693A (en) | Driving circuit of LED backlight and driving method thereof | |
| US7928668B2 (en) | Lamp control system | |
| CN201197214Y (en) | Light tube driving device | |
| US20080048524A1 (en) | Piezoelectric power supply | |
| CN201718092U (en) | Lamp lighting device utilizing uniform alternating current to drive light-emitting diodes | |
| CN103379696B (en) | Light emitting diode lighting device and light emitting diode lamps | |
| CN101865401A (en) | Aid-to-navigation lamp | |
| CN201238266Y (en) | Electric power circuit and television set | |
| CN101826803B (en) | Independent power supply module of liquid crystal display | |
| CN206481473U (en) | Light modulating device and LED dimming drive powers | |
| CN101697455A (en) | Power supply system and power supply method for LED electronic display screen | |
| WO2014183322A1 (en) | Light source module, and driving circuit and driving method thereof | |
| CN101038380B (en) | LCD and power supply circuit thereof | |
| CN201256475Y (en) | Multiple lamp tube driving circuit |
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: 20090218 Termination date: 20130403 |