CN101079581A - Reverser resetting method and its structure - Google Patents
Reverser resetting method and its structure Download PDFInfo
- Publication number
- CN101079581A CN101079581A CN 200610087867 CN200610087867A CN101079581A CN 101079581 A CN101079581 A CN 101079581A CN 200610087867 CN200610087867 CN 200610087867 CN 200610087867 A CN200610087867 A CN 200610087867A CN 101079581 A CN101079581 A CN 101079581A
- Authority
- CN
- China
- Prior art keywords
- inverter
- load
- status signal
- circuit
- resetting
- 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.)
- Granted
Links
Landscapes
- Inverter Devices (AREA)
Abstract
The invention discloses a replacing method of inverter, which comprises the following steps: (a) detecting the load condition of the inverter; (b) generating a load condition signal to resolve whether the load works normally; (c) replacing the inverter if the load condition signal displays abnormally.
Description
Technical field
The present invention relates to the inner remapping method of a kind of inverter, particularly relate to a kind of inner remapping method of inverter and structure thereof that is applied to flat-panel screens.
Background technology
Science and technology is maked rapid progress, and in electronic applications, panoramic circuit design is suggested according to various needs.Yet the design work of any circuit all needs to consider an identical key factor: power supply.In response to various operational environments and use restriction, the method for various power supplys supplies also occurred, wherein a kind of power supply provisioning technique: pulse width modulation (Pulse Width Modulation) control becomes apparent learning in recent power supply control field.
Please refer to J.Holtz " investigation of pulse width modulation ", IEEE Trans.Ind.Electron., volume 39, numbering 5, the 410-420 pages or leaves, in December, 1992.In the document, almost fixing DC connected voltage has been kept in the use of pulse width modulation (PWM) inverter, and has comprised voltage control and FREQUENCY CONTROL in inverter.During running, the mains switch in this inverter switches at high frequency.Generally speaking, modulation technique is divided into two classes: operate down in basic switching frequency with a fixing switching proportion, and a switching ratio continuously changes the motor current (being called sine pulse width modulation (PWM)) with synchronization one more approaching sine.
Pulse-width modulated inverter also is used in the plane and shows the field, and wherein, backlight module is more suitable for utilizing pulse width modulation to control stable power is provided because load has the characteristic of conducting front and back load cross-pressure and electric current variation.
Known inverter control circuit is classified load open circuit or overvoltage as main protection mechanism that inverter cuts out (shutdown) usually; make the power supply of this control circuit back that must cut off the power supply reset (reset), but should must be achieved with outside reset signal controlling party in the mechanism from system.
In other words, known technology utilizes the external control signal in the inverter to realize loop protection and replacement usually.Yet, can't detect from the control signal of system end whether inverter starts smoothly or whether load enters normal operating conditions.Be reflected in the operation, when being carried on aging or cryogenic conditions down during start, because the difference of starting resistor between a plurality of loads causes to start difficulty, even the protection mechanism of start-up system and close the loop circuit.Still can fill energy in advance and make load enter normal operating conditions though the user starts shooting repeatedly, cause integrity problem, more influence consumer's impression system.
Further analyze the problem of known technology, can find that cathode fluorescent tube (CCFL) is high impedance and high-tension assembly, under long use, make the characteristic impedance of cathode fluorescent tube (CCFL) become big, also cause inverter can't normally start the power supply of cathode fluorescent tube (CCFL), and its required driving voltage of the fluorescent tube of arranging is different and produce voltage difference, thereby produce the phenomenon of shutdown (Shutdown) automatically, and influenced the reliability of display panels.Moreover; because cathode fluorescent tube (CCFL) is high impedance and high-tension assembly; when the mode of start has repeatedly exceeded the critical point of overvoltage protection (Over Voltage Protection) of inverter; not only can cause the damage of other assembly, influence the quality of display panels more.
Trace it to its cause, be mainly system end can't detect whether inverter starts smoothly or whether load enters normal operating conditions.Therefore, a kind of inverter loop state and the method for controlling when unusual and circuit structure of detecting is that its needs are very arranged.
Summary of the invention
Main purpose of the present invention provides a kind of inverter with function of reset, utilizes a load condition control signal to realize the control of this reverser resetting, with preheating or protect this inverter.
Another object of the present invention provides a kind of reverser resetting circuit that the plane shows that is applied to, and the variation that utilizes this inverter load condition makes this inverter be able to adjust at load state to the control of resetting of this inverter.
Another object of the present invention provides one and is applied to the inverter that the plane shows, can avoid can't starting smoothly in this inverter in load aging or under the cryogenic conditions.
Another object of the present invention provides one and is applied to the reverser resetting method that the plane shows, the variation that utilizes this inverter load condition makes this inverter be able to adjust at load state to the control of resetting of this inverter.
Another object of the present invention provides one and is applied to the inverter guard method that the plane shows, when replacement number of times during less than a set point, the replacement number of times that adds up when the replacement number of times surpasses a set point, is closed this inverter in a counter.
For achieving the above object, the invention provides an inverter with function of reset, comprise:
One power conversion unit comprises a plurality of power switchs, and wherein these a plurality of power switchs are formed two groups of alternate conduction paths at least, and changing a direct current power supply is an AC power;
One control circuit provides a control signal to control the conducting of described power switch module and cut out; And
One reset circuit is electrically connected this control circuit, provides a load status signal to judge this inverter operating state, when this inverter operation irregularity, and this reset circuit this inverter of resetting.
For achieving the above object, the invention provides a reverser resetting method, comprise the following step:
Detect the load condition of a load of an inverter;
Produce a load status signal to differentiate whether operate as normal of this load;
When this load status signal shows that this loaded work piece is unusual, this inverter of resetting;
When a count value during less than a set point, the count value that adds up is represented this reverser resetting number of times;
This count value is closed this inverter during greater than a set point.
Can more deep understanding be arranged to the present invention by detailed description below in conjunction with accompanying drawing.
Description of drawings
Fig. 1 is the reverser resetting method flow chart of preferred embodiment of the present invention.
Fig. 2 has DC/AC inverter (Inverter) structure of function of reset for one of preferred embodiment of the present invention.
The reference numeral explanation
200 DC/AC inverters (Inverter) structure
201 voltage sources, 202 power-switching circuits
204 loads of 203 change-over circuit control circuits
205 load condition testing circuits, 206 reset signals produce circuit
207 reverser resetting circuit, 208 counter resets
Embodiment
Please refer to Fig. 1, Fig. 1 is the reverser resetting method flow chart of preferred embodiment of the present invention.At first, whether a load state that detects an inverter is normal, and this load can be a cold cathode ray tube, a fluorescent tube, a gas discharge lamp tube, metal halide lamp (metal halide lamp), high pressure mercury vapor lamp (sodium vapor lamp), X-ray pipe (x-ray tube) and external electrode fluorescent lamp (ExternalElectrode Fluorescent Lamp) and combination thereof.Characteristic with cold cathode ray tube is an example, and its current characteristics not conducting is preceding minimum, and a high voltage is arranged before the voltage characteristic conducting, reduce to a burning voltage after the conducting, generally speaking, cold cathode ray tube needs the starting resistor of about 1500 volts (RMS), and its operating voltage is about 800 volts (RMS).Produce a load status signal, this load status signal needs to represent that this load is in normal/abnormal operating state at least, and the high/low of electric current and voltage value of can this load status signal carrying is its technique of expression, but also not as limit.When this load state is unusual, produce a reset signal, aforementioned load state is meant that unusually this load is not switched on startup, this load circuit may be open-circuit condition or overvoltage condition, but visual load characteristic and system need setting, also not as limit.Utilize this reset signal this inverter of resetting.When reverser resetting number of times during less than a set point, the set point that adds up is to represent this reverser resetting number of times.When reverser resetting number of times during greater than a set point, this load is regarded as damaging and closing this load circuit.Aforementioned set point can need be set according to the user.
Aforementioned reverser resetting method is to utilize the signal corresponding to load condition to carry out the load condition judgement, that is utilizes inverter internal control mode, realizes aforesaid reverser resetting.Therefore, any method of utilizing said method to realize reverser resetting all should be considered as some of the present invention.
Please refer to Fig. 2, Fig. 2 for preferred embodiment of the present invention disclosed one have DC/AC inverter (Inverter) structure 200 of function of reset, comprise a direct current voltage source 201, a power-switching circuit 202, a control circuit 203, a load 204, a load condition testing circuit 205, a reset signal and produce circuit 206, a reverser resetting circuit 207, a counter reset 208.Wherein, this power-switching circuit 202 comprises a plurality of power switchs.
This direct voltage source 201 is electrically connected to this power-switching circuit 202.The output of this power-switching circuit 202 is electrically connected to this load 204, and above-mentioned electric coupling mode is called as power and transmits connection (Power Transfer Connection).
This power transmits the connecting circuit operating principle for utilizing the mutual conducting of high frequency between a plurality of power switchs in this power-switching circuit 202, and the DC power supply that this direct voltage source 201 is exported is converted to AC power, and inputs to load 204.This power-switching circuit 202 can utilize transformer or electric capacity etc. to boost and filter according to needs, converts the direct voltage source of input the alternating current of high pressure to, to cooperate these load characteristic 204 operating characteristic required.It should be noted that a plurality of power switchs in this power-switching circuit 202 can and be combined to form by P type MOSFET, N type MOSFET, but, also can be all kinds of transistor switches, as BJT etc. not as limit.In the present embodiment, this load 204 is to implement with cold cathode ray tube (CCFL), yet the present invention can be applied to any type of load, such as cold-cathode tube, gas discharge lamp tube, metal halide lamp (metal halide lamp), high pressure mercury vapor lamp (sodiumvapor lamp), X-ray pipe (x-ray tube) and external electrode fluorescent lamp (External ElectrodeFluorescent Lamp) etc. and combination thereof.
This load condition testing circuit 205 is electrically connected to this load 204 and this change-over circuit control circuit 203.This change-over circuit control circuit 203 is electrically connected with this power-switching circuit 202.Above-mentioned electric coupling mode is called as control loop and connects (Control Loop Connection).
This control loop connecting circuit operating principle for utilize one with the corresponding feedback signal of load, transmit this feedback signal to this change-over circuit control circuit 203.This change-over circuit control circuit 203 utilize this feedback signal with and the inner specific wave mode output that produces, produce a pulse width modulating signal and utilize this pulse width modulating signal and another its inner specific wave mode output that produces, produce a plurality of control signals in order to controlling the work period of conducting between a plurality of power switchs in this power-switching circuit 202, the alternating current of the stable and waveform symmetry of this load 204 is provided in the mode of conducting in turn.It should be noted that to comprise two groups of guiding paths in this power-switching circuit 202 at least, this at least two groups guiding path takes turns conducting, exchanges output to produce.The specific wave mode in this inside is identical with this another inner specific wave mode frequency, and the specific wave mode in this inside can be a triangle wave mode, and this another inner signal specific can be a pulse.But also not as limit, any ramp signal (Ramp Signal) or sawtooth signal all can be suitable for the present invention.
This reset signal produces circuit 206 and is electrically connected with this load condition testing circuit 205.The output that this reset signal produces circuit 206 is electrically connected with this reverser resetting circuit 207.This reverser resetting circuit 207 is electrically connected with this change-over circuit control circuit 203 and this counter reset 208 respectively.Above-mentioned electric coupling mode is called as the loop that lights a lamp and connects (Reviving Loop Connection).
This loop connecting circuit operating principle of lighting a lamp is to utilize this load condition testing circuit 205 to detect the state of this load 204, generation is corresponding to a load status signal of these load 204 operating states, and this load status signal is sent to the input that this reset signal produces circuit 206.This reset signal produces circuit 206 and utilizes this load status signal to differentiate whether operate as normal of this load 204, when these load 204 operating states are judged when unusual, this reset signal produces circuit 207 and produces a reset signal, aforementioned load state is meant that unusually this load 204 is not normally started, this load circuit may be open-circuit condition or overvoltage condition, but visual load characteristic and system need to set, also not as limit.A count value that stores when this counter reset 208 is during less than a default value, after receiving this reset signal, this reverser resetting circuit 207 activates, driving 203 pairs of these inverters of this change-over circuit control circuit resets and drives this counter reset 208 simultaneously and add up this count value to represent this reverser resetting number of times, after this count value surpassed this default value, this reverser resetting circuit 207 transmitted a shutdown signal to this change-over circuit control circuit 203 and closes this inverter 200.What deserves to be mentioned is, in the present embodiment, this load status signal can be one with these load 204 electric current coherent signals, but also can be designed to relevantly according to need with this load 204 voltages, or provide electric current relevant and voltage coherent signal simultaneously.
The aforementioned loop that lights a lamp is to utilize this load status signal corresponding to load condition to carry out the load condition judgement, that is utilizes the improvement of the mechanism of feedbacking in the known inverter structure, realizes aforesaid ignition method.Utilize this load status signal to finish the action of initiatively lighting a lamp.Therefore, any said method realize lighting a lamp circuit of control that utilizes all should be considered as scope of the present invention.
Specific embodiment of the invention described above and accompanying drawing are to enable those skilled in the art to understand, yet claim scope of the present invention is not confined to the foregoing description.Therefore, described purpose of the present invention realizes fully and effectively.Show based on the purpose of explanation function of the present invention and structural principle and specific embodiments of the invention are described, and can carry out the equalization variation described specific embodiment, and this type of principle of unlikely disengaging.Therefore, scope of patent protection of the present invention comprises spirit and all interior impartial variations of scope that are covered by claim of the present invention.
Claims (27)
1. inverter with function of reset comprises:
One power-switching circuit comprises a plurality of power switchs, and wherein these a plurality of power switchs are formed two groups of alternate conduction paths at least, and changing a direct current power supply is an AC power, and this AC power provides a load electric;
One control circuit provides a control signal to control the conducting of described power switch module and cut out; And
One reset circuit is electrically connected this control circuit, provides a load status signal to judge this inverter operating state, when this inverter operation irregularity, and this reset circuit this inverter of resetting.
2. inverter as claimed in claim 1 also comprises a counter, and this counter is in order to storing a count value, and when this count value during less than a set point, this count value activates number of times according to this reset circuit and adds up one by one.
3. inverter as claimed in claim 2 also comprises a protective circuit, is electrically connected with this counter, and when this count value during greater than a set point, this protective circuit activated to close this inverter.
4. inverter as claimed in claim 1, also comprise a state detection circuit, be electrically connected this load, produce a load status signal corresponding to this load condition, wherein this reset circuit receives this load status signal, this inverter of resetting when this load abnormal.
5. inverter as claimed in claim 3, also comprise a state detection circuit, be electrically connected this load, produce a load status signal corresponding to this load condition, wherein this reset circuit receives this load status signal, this inverter of resetting when this load abnormal.
6. inverter as claimed in claim 1, wherein this inverter operation irregularity be meant this inverter load occur open-circuit condition, overvoltage condition the two one of.
7. inverter as claimed in claim 1, when wherein this load status signal was a low-voltage state, this reset circuit activated this inverter of resetting.
8. inverter as claimed in claim 7, when wherein this load status signal was a high-voltage state, this load was considered as working properly, and this reset circuit does not activate.
9. inverter as claimed in claim 1, when wherein this load status signal was a high-voltage state, this reset circuit activated this inverter of resetting.
10. inverter as claimed in claim 9, when wherein this load status signal was a low-voltage state, this load was considered as working properly, and this reset circuit does not activate.
11. inverter as claimed in claim 1, wherein this load can be cold cathode ray tube, gas discharge lamp tube, fluorescent tube and combination thereof.
12. a reverser resetting method comprises the following step:
(a) load condition of a load of detection one inverter;
(b) produce a load status signal to differentiate whether operate as normal of this load;
(c) when this load status signal shows that this loaded work piece is unusual, this inverter of resetting.
13. method as claimed in claim 12 wherein should (c) step also comprise one (d) step:
When a count value during less than a set point, the count value that adds up is represented this reverser resetting number of times.
14. method as claimed in claim 13 wherein should (d) step also comprise one (e) step:
This count value is closed this inverter during greater than a set point.
15. method as claimed in claim 12, when wherein this load status signal is a low-voltage state, this inverter of resetting.
16. method as claimed in claim 15, when wherein this load status signal was a high-voltage state, this load was considered as working properly, and this reset circuit does not activate.
17. method as claimed in claim 12, when wherein this load status signal is a high-voltage state, this inverter of resetting.
18. method as claimed in claim 17, when wherein this load status signal was a low-voltage state, this load was considered as working properly, and this reset circuit does not activate.
19. a liquid crystal indicator comprises:
One power supply provides this liquid crystal indicator required power supply;
One liquid crystal face version has at least one backlight, and this liquid crystal indicator display light source is provided;
One has the inverter of function of reset, comprises:
One power conversion unit comprises a plurality of power switchs, and wherein these a plurality of power switchs are formed two groups of alternate conduction paths at least, and changing a direct current power supply is an AC power, and this AC power provides this backlight electric power;
One control circuit provides a control signal to control the conducting of described power switch module and cut out; And
One reset circuit is electrically connected this control circuit, provides a backlight status signal to judge this inverter operating state, when this inverter operation irregularity, and this reset circuit this inverter of resetting; And
One drive circuit produces drive signal to drive this liquid crystal face version.
20. liquid crystal indicator as claimed in claim 19, wherein this inverter also comprises a counter, and this counter is in order to storing a count value, and when this count value during less than a set point, this count value activates number of times according to this reset circuit and adds up one by one.
21. liquid crystal indicator as claimed in claim 20, wherein this inverter also comprises a protective circuit, is electrically connected with this counter, and when this count value during greater than a set point, this protective circuit activated to close this inverter.
22. liquid crystal indicator as claimed in claim 19, wherein this inverter operation irregularity be meant this backlight load occur open-circuit condition, overvoltage condition the two one of.
23. liquid crystal indicator as claimed in claim 19, when wherein this load status signal was a low-voltage state, this reset circuit activated this inverter of resetting.
24. inverter as claimed in claim 23, when wherein this backlight status signal was a high-voltage state, this load was considered as working properly, and this reset circuit does not activate.
25. liquid crystal indicator as claimed in claim 19, when wherein this load status signal was a high-voltage state, this reset circuit activated this inverter of resetting.
26. inverter as claimed in claim 25, when wherein this backlight status signal was a low-voltage state, this load was considered as working properly, and this reset circuit does not activate.
27. liquid crystal indicator as claimed in claim 19, wherein this backlight load can be cold cathode ray tube, gas discharge lamp tube, fluorescent tube and combination thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610087867A CN101079581B (en) | 2006-05-26 | 2006-05-26 | Reverser resetting method and its structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610087867A CN101079581B (en) | 2006-05-26 | 2006-05-26 | Reverser resetting method and its structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101079581A true CN101079581A (en) | 2007-11-28 |
| CN101079581B CN101079581B (en) | 2010-05-12 |
Family
ID=38906864
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200610087867A Expired - Fee Related CN101079581B (en) | 2006-05-26 | 2006-05-26 | Reverser resetting method and its structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101079581B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108279663A (en) * | 2018-01-24 | 2018-07-13 | 广汽丰田汽车有限公司 | The control system and control method of vehicle error signal, storage medium |
-
2006
- 2006-05-26 CN CN200610087867A patent/CN101079581B/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108279663A (en) * | 2018-01-24 | 2018-07-13 | 广汽丰田汽车有限公司 | The control system and control method of vehicle error signal, storage medium |
| CN108279663B (en) * | 2018-01-24 | 2019-12-20 | 广汽丰田汽车有限公司 | Control system and control method for vehicle error signal, and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101079581B (en) | 2010-05-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6954364B2 (en) | Backlight inverter for liquid crystal display panel with self-protection function | |
| CN100342755C (en) | Power for LCD screen | |
| KR20030022413A (en) | High efficiency driver apparatus for driving a cold cathode fluorescent lamp | |
| KR101127828B1 (en) | Driving apparatus and method for back light | |
| CN104505034A (en) | Liquid crystal display device, backlight module and backlight source driving circuit | |
| KR100631987B1 (en) | Driving apparatus for ccfl | |
| KR101539581B1 (en) | Method of driving a light source, light source assembly for performing the method and liquid crystal display device having the same | |
| US7372214B2 (en) | Apparatus and method for driving lamp of liquid crystal display device | |
| KR20040073533A (en) | Circuit arrangement for operation of one or more lamps | |
| US20090115339A1 (en) | Apparatus and Method for Controlling Driving of Lamp | |
| US7285925B2 (en) | Backlight module control circuit of multi-lamp display device | |
| CN1882211A (en) | Driving apparatus for CCFL | |
| CN101079581B (en) | Reverser resetting method and its structure | |
| CN1883238A (en) | Discharge lamp ballast with detection of abnormal discharge outside the arc tube | |
| US7579789B2 (en) | Device for driving light sources | |
| US20100097363A1 (en) | Switching mode power supply circuit for plasma display panel | |
| CN1856200A (en) | Lamp lighter with switchable working frequency | |
| US8022638B2 (en) | LCD backlight inverter | |
| TWI310530B (en) | Method and system for resetting inverter | |
| CN2565230Y (en) | Electric arc detecting and protecting apparatus | |
| KR20080000781A (en) | Protection circuit for inverter of driving lamps | |
| CN101352103B (en) | Apparatus and method for controlling driving of lamp | |
| KR100483051B1 (en) | A fault detection circuit of transformer in back-light inverter for lcd panel | |
| JP4690296B2 (en) | Discharge lamp lighting device | |
| CN1870846A (en) | Method and device for outputting drive voltage to cold-cathode tube circuit and electronic device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100512 Termination date: 20170526 |