CN100429864C - Current exchanger - Google Patents
Current exchanger Download PDFInfo
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- CN100429864C CN100429864C CNB200610007434XA CN200610007434A CN100429864C CN 100429864 C CN100429864 C CN 100429864C CN B200610007434X A CNB200610007434X A CN B200610007434XA CN 200610007434 A CN200610007434 A CN 200610007434A CN 100429864 C CN100429864 C CN 100429864C
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- end points
- inverter
- transformer
- electric capacity
- inductance
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Abstract
The disclosed inverter comprises: an inductance, a capacitor with a first end coupled with the inductance, a switch assembly connected between the first end and grounding, a drive circuit coupled and controlled the switch on-off state, and a transformer with primary side between capacitor second end and grounding and its secondary side coupled and driven a cold cathode fluorescence lamp.
Description
Technical field
The invention relates to a kind of inverter, and particularly relevant for a kind of inverter of single switch module.
Background technology
Along with scientific and technological progress, has flat-panel screens (the Flat Panel Display of advantages such as high image quality, volume are little, in light weight, low voltage drive, low consumpting power; FPD), be widely used in the electronic product display unit, and become the main flow of display.For example: portable television, mobile phone, shoot with video-corder projector, portable computer, console display, and consumer electronics or computer product such as rear-projection TV.
In flat-panel screens, use backlight module to be used as the light source of display.Backlight module utilizes inverter to drive a plurality of cathode fluorescent tubes, and the brightness of these cathode fluorescent tubes of may command.Fig. 1 is the inverter circuit schematic diagram of prior art.The inverter 110 of this prior art comprises an electric capacity 114, a plurality of switch module 116a, 116b, 116c and 116d, one drive circuit 140 and a transformer 150.Power supply 130 couples via switch module 116a, 116b, 116c and 116d and electric capacity 114. Switch module 116a, 116b, 116c and 116d couple drive circuit 140 respectively, and wherein drive circuit 140 is in order to the conducting of controlling these switch modules or end.In addition, electric capacity 114 and switch module couple the two ends of the primary side 119 of this transformer 150 respectively.Electric capacity 165 is coupled between the end and cathode fluorescent tube (CCFL) 170 of secondary side 160 of this transformer 150.So inverter 110 just can convert the direct current of power supply 130 to alternating current, the cathode fluorescent tube 170 that couples with the secondary side 160 of lighting transformer 150, and as the backlight of display floater 180.
No matter but be full-bridge type (full bridge) inverter or semibridge system (half bridge) the inverter (not shown) of Fig. 1, all need more than one switch module.More switch module number can influence chip area, and needs complicated drive circuit.So, can reduce chip area and the design of simplifying its drive circuit if a kind of inverter with small number of switches assembly is arranged.
Summary of the invention
Therefore one aspect of the present invention is that an a kind of inverter that has than a small size and a simple and easy drive circuit of need is being provided.
The present invention is providing a kind of inverter that single switch module just can be worked that has.
According to one embodiment of the invention, this inverter comprises an inductance, an electric capacity, a switch module, one drive circuit and a transformer.One first end points of electric capacity is coupled to inductance, and switch module then is connected across between first end points and an earth terminal of this electric capacity.Drive circuit is in order to couple switch module and the conducting of control switch assembly or to end.In addition, therewith between the earth terminal, the secondary side of transformer then couples and drives a cathode fluorescent tube in one second end points of electric capacity in the primary side cross-over connection of this transformer.
According to another embodiment of the present invention, this inverter comprises an inductance, an electric capacity, a switch module, one drive circuit and a transformer.One first end points of electric capacity is coupled in one first end points of inductance, and switch module then is connected across between one second end points and an earth terminal of this inductance.Drive circuit is in order to couple switch module and the conducting of control switch assembly or to end.In addition, the primary side of this transformer is connected across between second end points of one second end points of electric capacity and inductance, and the secondary side of transformer then couples and drive a cathode fluorescent tube.
According to another embodiment of the present invention, this inverter comprises an interphase reactor transformer, an electric capacity, a switch module and one drive circuit.Electric capacity is connected across between one first end points and one second end points of primary side of this interphase reactor transformer, and switch module is connected across between first end points and an earth terminal of interphase reactor transformer.Drive circuit is in order to couple switch module and the conducting of control switch assembly or to end.In addition, the primary side of this interphase reactor transformer more comprises one the 3rd end points, and between first end points and second end points, the 3rd end points couples the positive pole of a power supply, and the secondary side of interphase reactor transformer then couples and drive a cathode fluorescent tube.
Describe the present invention below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.
Description of drawings
For above and other objects of the present invention, feature, advantage and embodiment can be become apparent, appended graphic being described in detail as follows:
Fig. 1 is the inverter circuit schematic diagram of prior art.
Fig. 2 is the inverter circuit schematic diagram of a preferred embodiment of the present invention.
Fig. 3 is the inverter circuit schematic diagram of another preferred embodiment of the present invention.
Fig. 4 is the inverter circuit schematic diagram of another preferred embodiment of the present invention.
Wherein, Reference numeral is as follows:
110,210,310,410 inverters
112 inductance
114,165 electric capacity
116a, 116b, 116c, 116d, 216,316,416 switch modules
118 earth terminals
119,419 primary sides
130 power supplys
140,240,340,440 drive circuits
150 transformers
160,460 secondary sides
170 cathode fluorescent tubes
180 display floaters
215,315,415 first end points
217,317,318,417 second end points
418 end points
450 interphase reactor transformers
Embodiment
Fig. 2 is the inverter circuit schematic diagram of a preferred embodiment of the present invention.According to one embodiment of the invention, this inverter 210 comprises an inductance 112, an electric capacity 114, a switch module 216, one drive circuit 240 and a transformer 150.One first end points 215 of electric capacity 114 is coupled to inductance 112, and switch module 216 then is connected across between this first end points 215 and the earth terminal 118.Drive circuit 240 is in order to couple switch module 216 and 216 conductings of control switch assembly or to end.In addition, the primary side 119 of this transformer 150 is connected across one second end points 217 of electric capacity 114 therewith between the earth terminal 118.Electric capacity 165 is coupled between the end and a cathode fluorescent tube 170 of secondary side 160 of this transformer 150.Cathode fluorescent tube 170 couples the other end of the secondary side 160 of this transformer 150, and couples earth terminal.So inverter 210 makes the backlight of cathode fluorescent tube 170 as display floater 180 in order to light cathode fluorescent tube 170.
Inverter 210 in the foregoing description couples a power supply 130, and inductance 112 is coupled between switch module 216 and the power supply 130, and wherein the positive pole of power supply 130 couples this inductance, and the negative pole of this power supply couples earth terminal 118.This power supply 130 provides DC power supply to use to inverter 210.
Fig. 3 is the inverter circuit schematic diagram of another preferred embodiment of the present invention.According to another embodiment of the present invention, this inverter 310 comprises an inductance 112, an electric capacity 114, a switch module 316, one drive circuit 340 and a transformer 150.Electric capacity 114 is coupled in one first end points 315 of inductance 112, and switch module 316 then is connected across between one second end points 317 and an earth terminal 118 of this inductance 112.Drive circuit 340 is in order to couple switch module 316 and 316 conductings of control switch assembly or to end.In addition, the primary side 119 of this transformer 150 is connected across between second end points 317 of one second end points 318 of electric capacity 114 and inductance 112.Electric capacity 165 is coupled between the end and a cathode fluorescent tube 170 of secondary side 160 of this transformer 150.Cathode fluorescent tube 170 couples the other end of the secondary side 160 of this transformer 150, and couples earth terminal.So inverter 310 makes the backlight of cathode fluorescent tube 170 as display floater 180 in order to light cathode fluorescent tube 170.
Fig. 4 is the inverter circuit schematic diagram of another preferred embodiment of the present invention.According to another embodiment of the present invention, this inverter 410 comprises an interphase reactor transformer 450, an electric capacity 114, a switch module 416 and one drive circuit 440.Electric capacity 114 is connected across between one first end points 415 and one second end points 417 of primary side 419 of this interphase reactor transformer 450, and switch module 416 is connected across between first end points 415 and an earth terminal 118 of interphase reactor transformer 450.Drive circuit 440 is in order to couple switch module 416 and 114 conductings of control switch assembly or to end.
In the inverter 410 of the foregoing description, between first end points 415 and second end points 417 of the primary side 419 of interphase reactor transformer 450, has the positive pole that an end points 418 (being the centre tap end points) couples a power supply 130.Electric capacity 165 is coupled between the end and a cathode fluorescent tube 170 of secondary side 460 of this interphase reactor transformer 450.Cathode fluorescent tube 170 couples the other end of the secondary side 460 of this interphase reactor transformer 450, and couples earth terminal.So inverter 410 makes the backlight of cathode fluorescent tube 170 as display floater 180 in order to light cathode fluorescent tube 170.
Three embodiment of the invention described above can form with common DC-to-DC converter (DC-DCconverter) collocation one step-up transformer.So the inverter among these embodiment only needs a switch module, so just can reduce chip area and the design of simplifying its drive circuit.
In addition, the switch module 216,316 and 416 among three embodiment of the invention described above can use transistor and cooperate drive circuit to reach the function of switch module in integrated circuit.
Above-mentioned cathode fluorescent tube 170 is suitable as the light source of a display floater.Can apply to the display floater of kinds such as display panels, Plasmia indicating panel, organic LED display panel or low-temperature polysilicon film transistor.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (8)
1. an inverter is characterized in that, comprising:
An inductance;
An electric capacity, one first end points of this electric capacity is coupled in one first end points of this inductance;
Switch is connected across between one second end points and earth terminal of this inductance;
A drive circuit couples this switch, in order to control this switch conduction or to end; And
A transformer, the primary side of this transformer are connected across between this second end points of one second end points of this electric capacity and this inductance.
2. inverter as claimed in claim 1 is characterized in that, this of this inductance first end points couples the positive pole of a power supply.
3. inverter as claimed in claim 1 is characterized in that, this switch is a transistor.
4. inverter as claimed in claim 1 is characterized in that, the secondary side of this transformer is in order to couple and to drive a fluorescent tube.
5. an inverter is characterized in that, comprising:
An interphase reactor transformer;
Electric capacity is connected across between one first end points and one second end points of primary side of this interphase reactor transformer;
Switch is connected across between this first end points and earth terminal of this interphase reactor transformer; And
A drive circuit couples this switch, in order to control this switch conduction or to end.
6. inverter as claimed in claim 5 is characterized in that, the primary side of this interphase reactor transformer more comprises one the 3rd end points, and between this first end points and this second end points, the 3rd end points couples the positive pole of a power supply.
7. inverter as claimed in claim 5 is characterized in that, this switch only is a transistor.
8. inverter as claimed in claim 5 is characterized in that, the secondary side of this transformer is in order to couple and to drive a fluorescent tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200610007434XA CN100429864C (en) | 2006-02-10 | 2006-02-10 | Current exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200610007434XA CN100429864C (en) | 2006-02-10 | 2006-02-10 | Current exchanger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101018009A CN101018009A (en) | 2007-08-15 |
| CN100429864C true CN100429864C (en) | 2008-10-29 |
Family
ID=38726818
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200610007434XA Expired - Fee Related CN100429864C (en) | 2006-02-10 | 2006-02-10 | Current exchanger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100429864C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101582649B (en) * | 2008-05-16 | 2012-07-18 | 奇景光电股份有限公司 | DC-to-AC converter |
| CN107813031A (en) * | 2017-12-08 | 2018-03-20 | 苏州绿恺动力电子科技有限公司 | Portable inverter arc welding system and its power control method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5416387A (en) * | 1993-11-24 | 1995-05-16 | California Institute Of Technology | Single stage, high power factor, gas discharge lamp ballast |
| JPH0785661B2 (en) * | 1985-04-19 | 1995-09-13 | 松下電工株式会社 | Inverter device |
| CN1348676A (en) * | 1999-12-20 | 2002-05-08 | 皇家菲利浦电子有限公司 | High power electronic ballast with an integrated magnetic component |
| US6639366B2 (en) * | 2001-10-22 | 2003-10-28 | Chi Mei Optoelectronics Corp. | Power supply circuit for a cold-cathode fluorescent lamp |
| CN1700579A (en) * | 2004-05-19 | 2005-11-23 | 美国芯源系统股份有限公司 | Method and apparatus for single-ended conversion of DC to AC power for driving discharge lamps |
-
2006
- 2006-02-10 CN CNB200610007434XA patent/CN100429864C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0785661B2 (en) * | 1985-04-19 | 1995-09-13 | 松下電工株式会社 | Inverter device |
| US5416387A (en) * | 1993-11-24 | 1995-05-16 | California Institute Of Technology | Single stage, high power factor, gas discharge lamp ballast |
| CN1348676A (en) * | 1999-12-20 | 2002-05-08 | 皇家菲利浦电子有限公司 | High power electronic ballast with an integrated magnetic component |
| US6639366B2 (en) * | 2001-10-22 | 2003-10-28 | Chi Mei Optoelectronics Corp. | Power supply circuit for a cold-cathode fluorescent lamp |
| CN1700579A (en) * | 2004-05-19 | 2005-11-23 | 美国芯源系统股份有限公司 | Method and apparatus for single-ended conversion of DC to AC power for driving discharge lamps |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101018009A (en) | 2007-08-15 |
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Granted publication date: 20081029 Termination date: 20170210 |