CN1700280A - Plasma display apparatus and driving method thereof - Google Patents

Plasma display apparatus and driving method thereof Download PDF

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Publication number
CN1700280A
CN1700280A CNA2005100719241A CN200510071924A CN1700280A CN 1700280 A CN1700280 A CN 1700280A CN A2005100719241 A CNA2005100719241 A CN A2005100719241A CN 200510071924 A CN200510071924 A CN 200510071924A CN 1700280 A CN1700280 A CN 1700280A
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plasma display
voltage
pulse
switch
capacitor
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CN100428306C (en
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文圣学
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LG Electronics Inc
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LG Electronics Inc
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D11/00—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of plastics material
    • B65D11/18—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of plastics material collapsible, i.e. with walls hinged together or detachably connected
    • B65D11/1833—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of plastics material collapsible, i.e. with walls hinged together or detachably connected whereby all side walls are hingedly connected to the base panel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D25/00—Details of other kinds or types of rigid or semi-rigid containers
    • B65D25/20—External fittings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D25/00—Details of other kinds or types of rigid or semi-rigid containers
    • B65D25/54—Inspection openings or windows

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Control Of Gas Discharge Display Tubes (AREA)

Abstract

Provided is a plasma display apparatus. A plasma display apparatus according to a first embodiment of the present invention includes: a plasma display panel (PDP); and a set-up pulse supplying unit generating a constant current to be supplied to the PDP using a set-up voltage source, and supplying a set-up pulse rising to a set-up voltage with a predetermined slope according to a voltage between both terminals of a set-up capacitor charged or discharged by the constant current. A plasma display apparatus according to a second embodiment of the present invention includes: a PDP; a set-up pulse generator including a set-up capacitor for generating a constant current using a set-up voltage source and charging or discharging the constant current, to supply a reset pulse to the PDP; and a set-up pulse outputting unit outputting a set-up pulse rising to a set-up voltage with a predetermined slope according to a voltage between both terminals of the set-up capacitor.

Description

Plasma display system and driving method thereof
The application number that the application requires on May 21st, 2004 to submit to is: the application number that the korean patent application of 10-2004-0036511 and on July 19th, 2004 submit to is: the right of priority of the korean patent application of 10-2004-0056124, therefore, its full content quilt together as a reference.
Technical field
The present invention relates to plasma display system and driving method thereof.
Background technology
Usually, plasma display panel (PDP) shows the image comprise character or figure, this be by use inert mixed gas for example during potpourri (Ne+Xe) discharge of etc.ing of the potpourri of He-Xe (He+Xe), Ne-Xe the ultraviolet ray excited fluorescent powder of 147nm of generation send light and come display image.Along with current PDP Progress in technique, PDP can be manufactured into not only thin but also big, and has the quality of the figure of improvement.Especially, in three electrode A C surface-discharge PDP, because the wall electric charge is accumulated on its surface and the protected sputter influence of avoiding discharging and causing of electrode when discharge takes place, so low driven and long life-span are obtained.
Fig. 1 is the skeleton view of three electrode A C surface-discharge PDP 100 of routine.With reference to figure 1, three electrode A C surface-discharge PDP 100 comprise: go up substrate 10 and a following substrate 20 for one, electrode 11a (11a is used for each) is kept in scanning and the public electrode 12a (12a is used for each) that keeps is formed on substrate 10, and addressing electrode 22 (22 are used for each) is formed on down substrate 20.Scan electrode 11a and keep electrode 12a, it all is a transparency electrode, is made by ITO (indium tin oxide target).In order to reduce impedance, electrode 11a is kept in scanning and the public electrode 12a that keeps is installed together with metal electrode 11b and 12b respectively.Upper dielectric layer 13a and diaphragm 14 be applied to according to the order of sequence scanning keep electrode 11a and public keep electrode 12a be formed superincumbent on the substrate 10.The wall electric charge that generates when plasma discharge is accumulated on the upper dielectric layer 13a.Diaphragm 14 is used to prevent that upper dielectric layer 13a is by because the sputter damage that plasma discharge causes and quicken secondary electrons.Diaphragm 14 can be made by MgO.
Simultaneously, lower dielectric layer 13b and dividing plate rib (barrier ribs) 21 is formed on the following substrate 20 of addressing electrode 22 formation.Fluorescence coating 23 is applied on the exposed surface of lower dielectric layer 13b and dividing plate rib 21.Keeping electrode 11a with scanning and publicly keeping the direction that electrode 12a intersects and settle addressing electrode 22.Dividing plate rib 21 and the 22 parallel formation of addressing electrode are to prevent by the ultraviolet ray of the generation of discharging and the discharge cell that visible light leaks into adjacency.Therefore the ultraviolet ray excited fluorescence coating 23 that is generated by plasma discharge, is launched one of red, green and blue.Be formed on upper and lower substrate 10 and 20 and dividing plate rib 21 between the discharge space of discharge cell with for example potpourri (Ne+Xe) filling of the potpourri of He-Xe (He+Xe) or Ne-Xe of inert mixed gas.Now, the driving method with conventional PDP of said structure will be described with reference to figure 2.
Fig. 2 is the view that is used for the driving method of interpretation routine PDP.With reference to figure 2, the keeping the phase of cell discharge that it is initialization phase of being used for the whole screen of initialization PDP that the PDP driving method is divided subdomain, be used for the addressing phase of selected cell and be used to keep selection.In the initialization phase (replacement phase), the replacement pulse is applied to all scan electrode Y, and wherein, the replacement pulse is made up of upward slope pulse Ramp-up, flat pulse Flat and descending pulse Ramp-down.Being provided with among the phase SU of the phase of replacement, upward slope pulse Ramp-up is applied simultaneously all scan electrode Y.By applying upward slope pulse Ramp-up, discharge is created in all unit of screen.Because this is provided with discharge, positive wall electric charge is accumulated in addressing electrode X and keeps on the electrode Z, and negative wall electric charge is accumulated on the scan electrode Y.
Be applied among later decline (set-down) the phase SD at upward slope pulse Ramp-up, descending pulse Ramp-down is applied in, drop to ground voltage or predetermined negative voltage from the positive voltage that is lower than upward slope pulse Ramp-up crest voltage, so that in the unit, generate weak erasure discharge, and therefore partly wipe unwanted wall electric charge.Because this decline discharge, enough wall electric charges that stably generates the addressing discharge are retained in each unit.
Then, interim in addressing, negative scanning impulse Scan is applied to scan electrode Y according to the order of sequence, and simultaneously, a positive data pulse Data synchronously is applied to scanning impulse Scan and addresses electrode X.Electric potential difference between scanning impulse Scan and data pulse Data with add together in the wall voltage of the interim generation of initialization so that in the discharge cell that data pulse Data is applied in, generate the addressing discharge.When keeping voltage and be applied to the discharge cell of selecting by addressing discharge, enough generate the wall electric charge that discharges and be formed.Interim at decrement phase SD and addressing, positive dc voltage Zdc is applied to and keeps electrode Z, thereby reduces in the voltage difference of keeping between electrode Z and the scan electrode Y, and therefore, prevents in the erroneous discharge of keeping between electrode Z and the scan electrode Y.
Keeping interimly, keeping pulse Sus and alternately be applied to scan electrode Y and keep electrode Z.In the discharge cell of selecting by addressing discharge, whenever keep pulse Sus be applied in with discharge cell in the wall voltage addition, keep discharge, promptly show discharge, be created on scan electrode Y and keep between the electrode Z.
After keeping discharge and being performed, the ramp waveform with short pulse width and low voltage is provided to keeps electrode Z, so that wipe all wall electric charges in the discharge cell that remains in screen.
The drive waveforms that is used to provide predetermined is indicated among Fig. 3 to the scanning electrode drive with the PDP of the routine of above-mentioned PDP driving method driving.
Fig. 3 is the circuit diagram of the scanning electrode drive of conventional PDP.With reference to figure 3, scanning electrode drive comprises: keep pulse generator 40, one for one and pulse generator 42, falling pulse generator 44, negative scanning voltage generator 46, drive integrated circult 48, scan reference voltage generator 50 and one are set are connected the 7th switch Q7 that is provided with between generator 42 and the drive integrated circult 48.
Scanning electrode drive with above-mentioned structure is in acclivity waveform of interim generation and the decline ramp waveform reset.At this moment, with reference to figure 4, with the operation of each switch of explanation.
Fig. 4 is the time diagram of the conventional scanning electrode drive of explanation in the switching manipulation of a replacement phase acclivity waveform of generation and a decline ramp waveform, as shown in FIG. 3.Be used for before the replacement phase generates the process of setting and drop-out voltage, supposing: the voltage V that voltage source is set in explanation StIn the second capacitor C2 of Fig. 3, discharge.Again, suppose: when being switched on, providing and keep voltage V from keeping pulse generator 40 as the 5th switch Q5 that switch is set sTo node n1.
With reference to figure 4, be provided with interimly, the 5th switch Q5 and minion are closed Q7 and are switched on.At this moment, provide and keep voltage V from keeping pulse generator 40 sInternal body diodes by the 6th switch Q6, minion are closed Q7 and drive integrated circult 48, keep voltage V by what keep that pulse generator 40 provides sBe applied to scanning electrode wire Y1 to Ym.So scanning electrode wire Y1 rises to V rapidly to the voltage of Ym s
At this moment, because voltage V sBe provided to the negative terminal of the second capacitor C2, so the second capacitor C2 provides V s+ V StVoltage to the five switch Q5.The 5th switch Q5 provides the voltage that is provided by the second capacitor C2 in the first variable resistor VR1 of first switch Q5 front control by channel width to first node n1 with predetermined slope.Close Q7 and drive integrated circult 48 by minion, the voltage with predetermined slope that is applied to first node n1 is provided to scanning electrode wire Y1 to Ym.That is, acclivity waveform Ramp-up is applied to scanning electrode wire Y1 to Ym.
Be applied to scanning electrode wire Y1 after Ym at the acclivity waveform, the 5th switch Q5 is disconnected.Therefore, from keeping the voltage V that pulse generator 40 provides sBe applied to first node n1, and therefore, scanning electrode wire Y1 drops to V rapidly to the voltage of Ym s
After this, in decrement phase, minion is closed Q7 and is disconnected, and the tenth switch Q10 is switched on.The tenth switch Q10 with predetermined slope reduce channel width by at the voltage of the Section Point n2 of the second adjustable resistance VR2 of the tenth switch Q10 front control to scanning voltage-Vw (perhaps drop-out voltage).That is the Ramp-down of decline ramp waveform, is provided to scanning electrode wire Y1 to Ym.
By repeating above-mentioned process, pulse generator 42 and falling pulse generator 44 are set provides acclivity waveform and decline ramp waveform to arrive scanning electrode wire Y1 to Ym.
Simultaneously, because, for acclivity waveform Ramp-up, V are provided s+ V StHigh voltage in the long time, be provided to gradually as the 5th switch Q5 that switch is set, so, produce heat by impedance.Because the 5th switch Q5 operates in the behaviour area of ramp waveform between the rising stage, so heat is generated.
Usually, for fear of the generation of heat, use the expensive switchgear of the withstand voltage properties with enhancing, it has increased the manufacturing cost of PDP.
Further, because the generation of the heat in the 5th switch Q5, the gradient of upward slope pulse Ramp-up or performance may take place to change unintentionally.
Summary of the invention
Therefore, the objective of the invention is to solve at least the problem and the shortcoming of background technology.
The invention provides a kind of plasma display system, can be by generation and the minimizing manufacturing cost of change in the circuit for eliminating heat of the switchgear of the interim operation of replacement of plasma display panel (PDP).
According to one aspect of the present invention, a kind of plasma display system is provided, comprising: a plasma display panel (PDP); With one the pulse generator is set, its use is provided with the voltage source generation will be provided to the steady current of PDP, and provide according to rising to the pulse that is provided with that voltage is set with predetermined slope by the voltage between the two ends that capacitor is set of constant current charge or discharge.
According to another aspect of the present invention, a kind of plasma display system is provided, comprising: a PDP; One is provided with impulse generator, impulse generator is set comprises that use is provided with the capacitor that is provided with that voltage source generates steady current and charge or discharge steady current, to provide the replacement pulse to PDP; With one pulse outputting unit is set, output according to rising to the pulse that is provided with that voltage is set with predetermined slope at the voltage that is provided with between the two ends of capacitor.
Therefore, it can prevent to generate heat owing to be provided to the acclivity waveform of PDP in switchgear, and, by using low-cost switch, reduce manufacturing cost.
Description of drawings
Now, with reference to following accompanying drawing, will describe the present invention in detail, wherein, similar Reference numeral is quoted similar element.
Fig. 1 is the skeleton view of three electrode A C surface-discharge plasma display panels (PDP) of routine;
Fig. 2 is the view that is used for the driving method of interpretation routine PDP;
Fig. 3 is the circuit diagram of the scanning electrode drive of conventional PDP;
Fig. 4 is the conventional scanning electrode drive of explanation generates the switching manipulation of acclivity waveform and decline ramp waveform as shown in FIG. 3 in the replacement phase a time diagram.
Fig. 5 is the block diagram according to the plasma display system of the first embodiment of the present invention;
Fig. 6 is the circuit diagram according to the scan electrode driver of the plasma display system of the first embodiment of the present invention;
Fig. 7 is the circuit diagram according to the scan electrode driver of the plasma display system of the second embodiment of the present invention.
Embodiment
Now, with reference to the accompanying drawings, will preferred embodiment of the present invention be described in more detailed mode.
＜the first embodiment 〉
Plasma display system according to the first embodiment of the present invention comprises: a plasma display panel (PDP); With one the pulse generator is set, its use is provided with voltage source and generates the steady current that will be provided to PDP, and, provide according to rising to the pulse that is provided with that voltage is set with predetermined slope by the voltage between the two ends that capacitor is set of constant current charge or discharge.
Voltage source is set comprises that is provided with a switch.
The pulse generator is set comprises a variable resistor that is used to be controlled at the gradient of the voltage between the two ends that capacitor is set.
Variable resistor is connected and capacitor is set and is provided with between the voltage source.
Generate steady current by the switch that is provided with that operates in the zone of saturation.
Below, with reference to the accompanying drawings, will be described in detail according to the plasma display panel of the first embodiment of the present invention.
Fig. 5 is the block diagram according to the plasma display system of the first embodiment of the present invention.
As shown in FIG. 5, plasma display system comprises: a PDP100; A data driver 122 is used to provide data to addressing electrode X1 on the following substrate (not shown) that is formed on PDP 100 to Xm; A scanner driver 123 is used for driven sweep electrode Y1 to Yn; Keep driver 124 for one, be used to drive and keep electrode Z as common electrode; A time controller is controlled data driver 122, scanner driver 123 and is kept driver 124 when PDP 100 is driven; With a driving voltage maker 125, the driving voltage that is used to provide data driver 122, scanner driver 123 and keeps driver 124 needs.
In PDP 100, last substrate (not shown) links together with following substrate (not shown) with the predetermined distance that separates.A plurality of electrodes, for example scan electrode Y1 is formed on the substrate in couples to Yn and keep electrode Z.Addressing electrode X1 to Xm with scan electrode Y1 to Yn with keep the mode that electrode Z intersects and be formed on down on the substrate.
Carry out inverse gamma correction and error diffusion by inverse gamma correction circuit (not shown), error diffusion circuit (not shown) or the like, and be mapped to the data of each subdomain by subdomain mapping circuit (not shown), be provided to data driver 122.Data driver 122 responses are from the time control signal CTRL sampling and the locking data of time controller 121, and the data that acquisition is provided then are to addressing electrode X1 to Xm.
Under time controller 121 control, scanner driver 123 reset interim provide acclivity waveform Ramp-up and decline ramp waveform Ramp-down to scan electrode Y1 to Yn.Again, under the control of time controller 121, scanner driver 123 is at the interim scanning voltage-V that sequentially provides of addressing yScanning impulse S pTo scan electrode Y1 to Yn, and, keep interim provide by comprise wherein collection of energy circuit (energy collecting circuit) generation keep pulse to scan electrode Y1 to Yn.
During decline ramp waveform Ramp-down is generated and in when addressing, keeping driver 124 provides and keeps voltage V sBe biased into and keep electrode Z.Under the control of time controller 121, interim when keeping, the driving circuit of keeping that is included in the scanner driver 123 is kept the driving circuit alternate run in the scanner driver 123 with being included in, and provides and keeps pulse Sus to keeping electrode Z.
Time controller 121 receives horizontal/vertical synchronization signals and clock signal, generation is used in replacement phase, addressing phase and keeps the working time of each driver 122,123 of interim control and 124 and synchronous time control signal CTRX, CTRY and CTRZ, and, provide time control signal CTRX, CTRY and CTRZ to corresponding driver 122,123 and 124, and therefore Control Driver 122,123 and 124.
Simultaneously, the time control signal CTRX as data controlling signal comprises that one is used for the sampling clock of sampled data, a lock control signal and a switch controlling signal that is used to control the on/off time of keeping driving circuit and driving switch equipment.Time control signal CTRY as scan control signal comprises a switch controlling signal that is used for the controlling and driving switchgear and is included in the on/off time of keeping driving circuit of scanner driver 123.Comprise a switch controlling signal that is used for the controlling and driving switchgear and is included in the on/off time of keeping driving circuit of keeping driver 124 as the time control signal CTRZ that keeps control signal.
Driving voltage maker 125 generates voltage V is set Set, scanning utility voltage V Scan-com, scanning voltage-V y, keep voltage V s, data voltage V dDeng.Driving voltage can be according to the structure of the composition of discharge gas or discharge cell and is changed.
Having as above, the plasma display system according to the first embodiment of the present invention of structure shows the image of being made up of the frame of the combination of using at least one subdomain, wherein, in replacement phase, addressing phase with keep interimly, driving pulse is applied to addressing electrode, scan electrode and keep electrode.
Simultaneously, when the plasma display system according to the first embodiment of the present invention is driven, as shown in FIG. 6 at the scanner driver of replacement phase operation.
Fig. 6 is the circuit diagram according to the scanner driver of the plasma display system of the first embodiment of the present invention.With reference to figure 6, scanner driver comprises that is provided with a pulse generator 210, and being used for provides a replacement pulse to scan electrode at the phase SU of setting.
Pulse generator 210 is set comprises that is provided with a switch Q s, a variable resistor R v, and one capacitor C is set Setup
Switch Q is set sDrain terminal be connected to voltage source V be set SetupVariable resistor R vAn end be connected to switch Q be set sThe source end.Capacitor C is set SetupAn end be connected to variable resistor R vThe other end.
Switch Q is set sThe response time signal is switched on and operates in the zone of saturation.Therefore, voltage source V is set SetupWith switch Q is set sPlay the effect of constant current source.So, compare with the switch Q5 that is provided with that operates in the routine in active stage, switch Q is being set sThe middle heat that generates is seldom.Like this, because be created on switch Q is set sIn hot considerably less, so, can solve the gradient of upward slope pulse or the problem that characteristic by mistake changes.
Variable resistor R vWith capacitor C is set SetupThe gradient of decision upward slope pulse.That is, by voltage source V is set SetupWith in the zone of saturation, move switch Q is set s, steady current is via variable resistor R vFlow to capacitor C is set Setup, therefore, give capacitor C is set SetupCharging.
Like this, when capacitor C is set SetupWhen being recharged, capacitor C is being set SetupTwo ends between voltage generate to rise to voltage V be set with predetermined slope SetupThe upward slope pulse, and the upward slope pulse is applied to scan electrode.
If variable resistor R vImpedance variation, so, variable resistor R vWith capacitor C is set SetupTime constant change, therefore, capacitor C is set SetupThe rapid change of charging is so that the gradient of upward slope pulse can Be Controlled.
In decrement phase SD, because the electromotive force of scan electrode should be from being provided with voltage V SetupDescend, so, be switched on so that capacitor C is set for second switch Q2 SetupDischarge.
As mentioned above, do not generate any heat, in the pulse generator 210 switch Q is set because be included in to be provided with according to the plasma display system of the first embodiment of the present invention sOperate in the zone of saturation of the phase of setting, rather than in active stage.So, under identical voltage, can use the switch that is provided with of low current, the result reduces manufacturing cost.
＜the second embodiment 〉
Plasma display system according to the second embodiment of the present invention comprises: a PDP; One is provided with impulse generator, impulse generator is set comprises that a use is provided with the capacitor that is provided with that voltage source generates steady current and charge or discharge steady current, to provide the replacement pulse to PDP; With one pulse outputting unit is set, output according to rising to the pulse that is provided with that voltage is set with predetermined slope at the voltage that is provided with between the two ends of capacitor.
Generate steady current by the switch that is provided with that operates in the zone of saturation.
Switch is set to be connected to voltage source is set.
Impulse generator is set comprises a variable resistor, be used to be controlled at the gradient of the voltage between the two ends that capacitor is set.
Variable resistor is connected and switch is set and is provided with between the capacitor.
Impulse generator is set also comprises time switch, be used for discharging filling the electric charge of capacitor is being set.
Time switch is with that capacitor is set is in parallel.
Pulse outputting unit is set comprises first operating switch and second operating switch.First and second operating switchs are according to carrying out push-pull operation at the voltage that is provided with between the two ends of capacitor.
Flat pulse width according to the pulse width control setting pulse of the time signal that is used to control the time switch operation.
Below, with reference to the accompanying drawings, will be described in detail according to the plasma display panel of the second embodiment of the present invention.
＜the second embodiment 〉
Fig. 7 is the circuit diagram according to the scan electrode driver of the plasma display system of the second embodiment of the present invention.In plasma display system according to the second embodiment of the present invention, other parts except the driving circuit of scanner driver have and the identical structure of counterpart according to the plasma display system of the first embodiment of the present invention, so the detailed explanation of these parts is omitted.
As mentioned above, comprise that according to the scanner driver of the plasma display system of the second embodiment of the present invention one is provided with impulse generator 310 and pulse outputting unit 320 is set, be used for providing one pulse to be set to scan electrode at the phase SU of setting.
Impulse generator 310 is set comprises that is provided with a switch Q s, a variable resistor R v, one capacitor C is set Setup, and time switch Q t
Switch Q is set sDrain terminal be connected to voltage source V be set SetupVariable resistor R vAn end be connected to switch Q be set sThe source end.Capacitor C is set SetupAn end be connected to variable resistor R vThe other end.Time switch Q tDrain terminal be connected to capacitor C be set SetupAn end, and, time switch Q tThe source end be connected to capacitor C be set SetupThe other end.
Pulse outputting unit 320 is set comprises the first operating switch Q FirstWith the second operating switch Q Second
The first operating switch Q FirstDrain terminal be connected to voltage source V be set SetupThe second operating switch Q SecondDrain terminal be connected to the first operating switch Q FirstThe source end.The first and second operating switch Q FirstAnd Q SecondGate terminal interconnected, and be connected to capacitor C be set SetupAn end.
The conventional switch Q5 that is provided with is provided in active stage and moves, yet, the switch Q that is provided with of the present invention sBe provided in the zone of saturation and move.
Because the switch Q that is provided with of the present invention sOperate in the zone of saturation, so, voltage source V is set SetupWith switch Q is set sPlay the effect of constant current source.So, compare with the heat that generates among the switch Q5 that is provided with that operates in the routine in active stage, switch Q is being set sThe middle heat that generates is seldom.Like this, because be created on switch Q is set sIn hot considerably less, so, can solve the gradient of upward slope pulse or the problem that characteristic by mistake changes.
Variable resistor R vWith capacitor C is set SetupThe gradient of decision upward slope pulse.That is, by voltage source V is set SetupWith in the zone of saturation, move switch Q is set s, steady current is via variable resistor R vFlow to capacitor C is set SetupThereby, give capacitor C is set SetupCharging.
Like this, when capacitor C is set SetupWhen being recharged, capacitor C is being set SetupTwo ends between voltage rise gradually with the predetermined gradient.Therefore, the first operating switch Q FirstConnected gradually, and, apply to rise to voltage V is set with predetermined slope SetupThe upward slope pulse to scan electrode.
If variable resistor R vImpedance variation, so, variable resistor R vWith capacitor C is set SetupTime constant change, therefore, capacitor C is set SetupThe rapid change that is recharged is so that the gradient of upward slope pulse can Be Controlled.
In decrement phase SD, because the electromotive force of scan electrode should be provided with voltage V SetupDescend, so, time switch Q tWith second switch Q SecondBe switched on, so that capacitor C is set SetupDischarge.Here, according to being used to control time switch Q tThe pulse width decision of time signal of on/off operation in the pulse width of the flat pulse Flat shown in Fig. 2.
That is, if time switch Q tTrip time increase, so, capacitor C is being set SetupTwo ends between voltage rise with the predetermined gradient, and, keep constant at preset time.
So, according to the first operating switch Q FirstMaking operation, the voltage of scan electrode rises with the predetermined gradient, and is maintained at voltage V is set SetupAfter this, if time switch Q tBe switched on, so, capacitor C be set SetupTherefore discharge, finishes flat pulse Flat.
Because according to time switch Q tThe pulse width that determines flat pulse Flat trip time, so the pulse width of flat pulse Flat depends on and is used to determine time switch Q tThe pulse width of time signal of trip time.
Like this, by the gradient of control upward slope pulse and the pulse width of flat pulse, just can make discharge performance maximize.
The first and second operating switch Q of output replacement pulse FirstAnd Q SecondConstitute a push-pull circuit.
Constitute the first and second operating switch Q of push-pull circuit FirstAnd Q SecondPreventing influences the replacement pulse by the pulse of keeping of the high-frequency and high-voltage of maintainer 40 output.
That is, because by the first and second operating switch Q FirstAnd Q SecondThe push-pull circuit of forming has high input impedance and low output impedance, so this push-pull circuit and maintainer 40 are isolated, and, seldom be subjected to the influence of keeping pulse of high-frequency and high-voltage.
Therefore, the present invention as mentioned above, apparent the present invention can change with many methods.Such variation can not depart from the spirit and scope of the present invention, and these modifications conspicuous for those skilled in the art will be included in the scope of claim.

Claims (14)

1, a kind of plasma display system comprises:
A plasma display panel (PDP); With
One is provided with the pulse generator, and its use is provided with voltage source and generates steady current, and, provide according to the voltage that capacitor is set and rise to the pulse that is provided with that voltage is set with predetermined slope by constant current charge or discharge.
2, according to the plasma display system of claim 1, wherein, voltage source is set comprises that is provided with a switch.
3, according to the plasma display system of claim 1, wherein, the pulse generator is set comprises a variable resistor that is used for the voltage gradient of control setting capacitor.
4, according to the plasma display system of claim 3, wherein, variable resistor is connected and capacitor is set and is provided with between the voltage source.
5, according to the plasma display system of claim 1, wherein, generate steady current by the switch that is provided with that in the zone of saturation, moves.
6, a kind of plasma display system comprises:
A plasma display panel (PDP);
One is provided with impulse generator, comprises that a use is provided with the capacitor that is provided with that voltage source generates steady current and charge or discharge steady current, to provide the replacement pulse to PDP; With
One is provided with pulse outputting unit, and output rises to the pulse that is provided with that voltage is set according to the voltage that capacitor is set with predetermined slope.
7, according to the plasma display system of claim 6, wherein, generate steady current by the switch that is provided with that operates in the zone of saturation.
8,, wherein, switch is set is connected to voltage source is set according to the plasma display system of claim 7.
9, according to the plasma display system of claim 6, wherein, impulse generator is set comprises a variable resistor, be used for the gradient of the voltage of control setting capacitor.
10, according to the plasma display system of claim 9, wherein, variable resistor is connected and switch is set and is provided with between the capacitor.
11, according to the plasma display system of claim 6, wherein, impulse generator is set also comprises time switch, be used for discharging filling the electric charge of capacitor is being set.
12, according to the plasma display system of claim 11, wherein time switch is with that capacitor is set is in parallel.
13, according to the plasma display system of claim 6, wherein, pulse outputting unit is set comprises first operating switch and second operating switch, and wherein, first operating switch and second operating switch are carried out according to the voltage that capacitor is set and recommended operation.
14, according to the plasma display system of claim 11, wherein, the pulse width of the flat pulse in pulse is set is controlled according to the pulse width of the time signal of the operation that is used to control time switch.
CNB2005100719241A 2004-05-21 2005-05-23 Plasma display apparatus and driving method thereof Expired - Fee Related CN100428306C (en)

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KR1020040036511 2004-05-21
KR1020040036511A KR100625498B1 (en) 2004-05-21 2004-05-21 Device of Plasma Display Panel
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