CN100555379C - The composite display drive method of shadow mask plasma display panel - Google Patents
The composite display drive method of shadow mask plasma display panel Download PDFInfo
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- CN100555379C CN100555379C CN 200710190380 CN200710190380A CN100555379C CN 100555379 C CN100555379 C CN 100555379C CN 200710190380 CN200710190380 CN 200710190380 CN 200710190380 A CN200710190380 A CN 200710190380A CN 100555379 C CN100555379 C CN 100555379C
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Abstract
The invention discloses a kind of composite display drive method of shadow mask plasma display panel, it combines the advantage of subtend discharge and surface-discharge, keep at one and to carry out subtend discharge, the scan electrode between scan electrode and the addressing electrode in the phase simultaneously and to keep surface-discharge between the electrode, promptly realized compound discharge.This compound discharge makes region of discharge enlarge, and diminishes with the distance of fluorescent powder, thereby luminescence efficiency and brightness all are optimized.
Description
Technical field
The present invention relates to a kind of driving method of shadow mask plasma display panel, especially a kind of composite display drive method that combines existing subtend discharge driving method and surface-discharge driving method advantage, specifically a kind of composite display drive method of shadow mask plasma display panel.
Background technology
The structure of the shadow mask plasma display panel that adopts mainly comprises prebasal plate, metacoxal plate and shadow mask at present.Prebasal plate is from glass substrate, is respectively scan electrode, dielectric layer and the protective seam that forms on the dielectric layer surface; Metacoxal plate is respectively the addressing electrode vertical with scan electrode from glass substrate, dielectric layer and the protective seam that forms on dielectric layer; Being clipped in the middle shadow mask of forward and backward substrate is the metal foil web plate that comprises the mesh array that is processed by conductive material (for example iron or its alloy).To charge into predetermined working gas after above-mentioned prebasal plate, shadow mask and the metacoxal plate assembling sealing-in, for example various inert gases promptly form shadow mask plasma display panel.Shadow mask plasma display panel mainly adopts the discharge of subtend formula and two kinds of principle of work of surface-type discharge at present.The principle of work of subtend formula discharge is as follows: at first add a high voltage narrow pulse or oblique wave pulsed erase signal between address electrodes of address electrode group and scan electrode, wipe the wall electric charge of discharge accumulation last time; On scan electrode, add a high impulse addressing voltage then and choose this row, on addressing electrode, apply simultaneously the data pulse of this row, the difference of this data pulse voltage amplitude and scanning voltage is higher than the firing voltage between scan electrode and the addressing electrode, control triggers discharge, thereby forms the wall CHARGE DISTRIBUTION corresponding with required display message at this row; After finishing whole screen image initial discharge line by line, between scan electrode group and addressing electrode, apply and keep pulse, to show this two field picture.Circulation like this is display image frame by frame.The principle of work of surface-type discharge is as follows: at first apply positive pulse on addressing electrode, apply negative pulse at scan electrode, when the voltage between addressing electrode and the scan electrode discharges earlier between them during greater than firing voltage, the required wall electric charge of discharge is kept in accumulation, make this unit be in illuminating state simultaneously, apply the negative pulse of keeping keeping electrode, the discharge cell of lighting is at the wall electric charge and keep under the acting in conjunction of pulse, the state that always maintainings lights is up to the arrival of erasing pulse.For colored shadow mask plasma display panel, the coated inner wall three primary colors fluorescent powder of shadow mask, the vacuum-ultraviolet light that gas discharge produces in each discharge cell excites different fluorescent materials to send corresponding three primary colours light.Yet all have some problems in above-mentioned subtend discharge or the surface-discharge shadow mask plasma display panel: adopt subtend formula discharging structure, discharge path is short, and region of discharge is far away from fluorescent powder, so discharging efficiency is lower; Adopt the surface-type discharging structure, though discharge path is elongated, discharging efficiency improves, a little less than the brightness ratio subtend discharge of surface-discharge, and surface-discharge required to keep voltage higher relatively.In sum, existing surface-discharge shadow mask plasma display panel and subtend discharge shadow mask plasma display panel all comes with some shortcomings.
Summary of the invention
The objective of the invention is to adopt subtend formula discharging efficiency low at existing shadow mask plasma display panel, adopt surface-type discharge brightness low, keep the high problem of voltage, a kind of advantage that combines subtend discharge and surface-discharge of invention on the basis of three-electrode structure makes the composite display drive method of the new shadow mask plasma display panel that luminescence efficiency and brightness all is improved.
Technical scheme of the present invention is:
A kind of composite display drive method of shadow mask plasma display panel, it is characterized in that on addressing electrode, applying waveform and make the compound discharge of formation in the display unit, in the time that shows a two field picture, arrange the experimental process field, each son field is by address period, keeping phase and erasing period forms, address period is finished the igniting to full frame each pixel successively, the phase of keeping forms compound discharge by the subtend discharge between scan electrode and the addressing electrode and scan electrode and the surface-discharge kept between the electrode, make the pixel of being lighted a fire in address period keep gas discharge state and luminous, erasing period utilizes an erasing pulse to finish wiping the wall electric charge of the neutralization of discharge space charged particle and dielectric surface.
Apply positive voltage pulse at the address period addressing electrode, scan electrode applies negative potential pulse, keeps and applies positive voltage pulse or ground connection on the electrode, and the voltage amplitude of wherein keeping electrode is with the voltage amplitude of addressing electrode or for identical, or be difference.
Each cycle of keeping is divided into upper and lower two stages in the phase of keeping: first cycle scan electrode applies positive voltage pulse, addressing electrode with keep electrode and all apply negative voltage pulse or ground connection; Second cycle scan electrode applies negative voltage pulse or ground connection, addressing electrode with keep electrode and all apply positive voltage pulse, wherein keep the voltage amplitude of the voltage amplitude of electrode and addressing electrode or identical or different.
Beneficial effect of the present invention:
Because the image display driver waveform of existing shadow mask plasma display panel only adopts the form of subtend discharge or surface-discharge in the phase of keeping, and causes brightness and efficient can not reach optimization.According to the characteristics of subtend discharge and surface-discharge, the present invention proposes to adopt the drive waveforms of the compound discharge-type of shadow mask, makes brightness and efficient obtain optimization.The experimental result of subtend discharge, surface-discharge and compound discharge shows, the strength of discharge of compound discharge is higher, discharging efficiency is between surface-discharge and subtend discharge, but adopt compound discharge to make region of discharge enlarge, diminish with the distance of fluorescent powder, thereby luminescence efficiency and brightness all are optimized.
Description of drawings
Fig. 1 is three electrode shadow mask plasma display panel structural representations of the present invention.
Fig. 2 for traditional 256 grades of gray scales of demonstration with the memory-type of eight sons the time sequential mode synoptic diagram.
Fig. 3 is shadow mask three-electrode surface discharge each electrode work wave synoptic diagram in single son field.
Fig. 4 is that the compound discharge of shadow mask three electrodes is at one of each single sub electrode work wave synoptic diagram.
Fig. 5 is that the compound discharge of shadow mask three electrodes is at two of each single sub electrode work wave synoptic diagram.
Embodiment
The present invention is further illustrated below in conjunction with drawings and Examples.
Shown in Fig. 1,3.
Fig. 1 is a kind of three electrode shadow mask plasma display panels, it comprises prebasal plate 1, metacoxal plate 2, shadow mask 3, wherein shadow mask 3 is encapsulated in front-back baseboard 1, between 2, described prebasal plate 1 is mainly by preceding substrate glass substrate 4, first electrode pair 5,6, dielectric layer 7, diaphragm 8 is formed, first electrode pair 5 wherein, 6 are parallel on the preceding substrate glass substrate 4, and it can be the electrode that does not have transparent conductive film ITO to constitute, and electrode 5 is called keeps electrode, electrode 6 is called scan electrode, dielectric layer 7 covers on first electrode pair 5,6, and 8 of diaphragms cover on the dielectric layer 7; Described metacoxal plate 2 mainly is made up of back substrate glass substrate 9, second electrode 10, dielectric layer 11, wherein second electrode 10 is positioned on the back substrate glass substrate 9, dielectric layer 11 covers on second electrode 10, second electrode 10 is commonly referred to row electrode group or addressing electrode, with first electrode pair 5 on the prebasal plate 1, become the spatial vertical quadrature; Described shadow mask 3 is that a thickness d is the current-carrying plate that comprises infundibulate grid hole 12 arrays of 0.1～1.0mm, described infundibulate grid hole 12 and prebasal plate 1 relative upper shed 13 areas are 10～20 times of relative under shed 14 areas of itself and metacoxal plate 2, and each infundibulate grid hole 12 upper shed width 15 is 2～4 times of under shed width 16; First electrode pair 5,6 are and are arranged in parallel, corresponding with the two ends of upper shed 13 of infundibulate grid hole 12 on the shadow mask 3 respectively, the under shed 14 of the infundibulate grid hole 12 on second electrode 10 and the shadow mask 3 is corresponding, the under shed width 16 of each grid hole 12 is 1～2 times of second electrode, 10 width 17, upper shed length 19 is 1.5～2 times of under shed length 18, first electrode pair 5,6 electrode width 20 is identical, upper shed length 20 is first electrode pairs 5,1.25～5 times of parallel distance 21 between 6, each grid hole 12 and first electrode pair 5,6 and second electrode 10 intersect vertically.First electrode pair 5 of described shadow mask 3, blanket dielectric layer 7 and protective seam 8; 6 form the elementary cell that medium blocking types exchange compound discharge-type with second electrode 10 that is coated with dielectric layer 11, are provided with the visible light light-emitting zone in this medium blocking type exchanges the elementary cell of compound discharge-type.
For plasma driving work, need a write pulse that surpasses ignition voltage to being positioned at the locational discharge space of surface electrode and addressing electrode point of crossing, be that selected pixel produces gas discharge, afterwards by applying lasting alternating voltage to keep the discharge condition of this pixel, discharge gas constantly discharges ultraviolet ray therebetween, excite the fluorescent powder on the shadow mask grid hole wall around the discharge space to send the light of respective color, and this alternating voltage itself except that keep the underswing of discharge with cause other not the discharge pixel generation discharge.Can finish purposes if wish three electrode shadow mask plasma display panel (PDP), a kind of gray level display mode must be arranged as the demonstration full color dynamic image of TV or computer display terminal one class.Fig. 2 provided can show 256 grades of gray scales with eight the son memory-type the time sequential mode.According to common video display requirement, dynamic image carries out image by the speed of per second 60 frames and shows, promptly per 16.6 milliseconds show a frame rest image.Sequential mode is to be divided into demonstration time with a two field picture eight sons during with the memory-type of eight sons, and each son field comprises an address period, one and keeps phase and an erasing period.
Fig. 3 has provided a kind of shadow mask three-electrode surface discharge each electrode work wave in single son field.
In address period, scan electrode adds negative scanning impulse, add positive data voltage on the addressing electrode, two interelectrode voltage differences surpass ignition voltage, the pixel that this row is chosen enters by fired state, keeps electrode and adds 0V voltage, then finishes the addressing of this child field to whole screen image element after all line scannings, all unit of being lighted have all accumulated the wall electric charge at discharge space, prepare for keeping discharge; Keep interim, alternately apply the positive pulse of keeping on electrode and the scan electrode keeping, addressing electrode keeps ground state, discharge space to each pixel produces the effect of keeping that exchanges, discharge is kept in the unit that address period is lighted, and the unit that address period is not lighted still is in the state that does not discharge because do not accumulate the wall electric charge; In erasing period, by an erasing pulse space charged particle under the discharge final state is neutralized, can not cause the not discharge of lighting unit, wipe simultaneously and light the wall electric charge that accumulates on the lighting unit.Shadow mask keeps floating potential in whole process.
Embodiment two.
Shown in Fig. 1,4.
Three electrode shadow mask plasma display panels as shown in Figure 1, comprise prebasal plate 1, metacoxal plate 2, shadow mask 3, wherein shadow mask 3 is encapsulated in front-back baseboard 1, between 2, described prebasal plate 1 is mainly by preceding substrate glass substrate 4, first electrode pair 5,6, dielectric layer 7, diaphragm 8 is formed, first electrode pair 5 wherein, 6 are parallel on the preceding substrate glass substrate 4, and it can be the electrode that does not have transparent conductive film ITO to constitute, and electrode 5 is called keeps electrode, electrode 6 is called scan electrode, dielectric layer 7 covers on first electrode pair 5,6, and 8 of diaphragms cover on the dielectric layer 7; Described metacoxal plate 2 mainly is made up of back substrate glass substrate 9, second electrode 10, dielectric layer 11, wherein second electrode 10 is positioned on the back substrate glass substrate 9, dielectric layer 11 covers on second electrode 10, second electrode 10 is commonly referred to row electrode group or addressing electrode, with first electrode pair 5 on the prebasal plate 1, become the spatial vertical quadrature; Described shadow mask 3 is that a thickness d is the current-carrying plate that comprises infundibulate grid hole 12 arrays of 0.1～1.0mm, described infundibulate grid hole 12 and prebasal plate 1 relative upper shed 13 areas are 10～20 times of relative under shed 14 areas of itself and metacoxal plate 2, and each infundibulate grid hole 12 upper shed width 15 is 2～4 times of under shed width 16; First electrode pair 5,6 are and are arranged in parallel, corresponding with the two ends of upper shed 13 of infundibulate grid hole 12 on the shadow mask 3 respectively, the under shed 14 of the infundibulate grid hole 12 on second electrode 10 and the shadow mask 3 is corresponding, the under shed width 16 of each grid hole 12 is 1～2 times of second electrode, 10 width 17, upper shed length 19 is 1.5～2 times of under shed length 18, first electrode pair 5,6 electrode width 20 is identical, upper shed length 20 is first electrode pairs 5,1.25～5 times of parallel distance 21 between 6, each grid hole 12 and first electrode pair 5,6 and second electrode 10 intersect vertically.First electrode pair 5 of described shadow mask 3, blanket dielectric layer 7 and protective seam 8; 6 form the elementary cell that medium blocking types exchange compound discharge-type with second electrode 10 that is coated with dielectric layer 11, are provided with the visible light light-emitting zone in this medium blocking type exchanges the elementary cell of compound discharge-type.
At the scan electrode of prebasal plate 1 with keep on the electrode, apply drive waveforms as shown in Figure 4 on the addressing electrode of metacoxal plate 2, shadow mask adopts floating potential.In address period, scan electrode applies negative voltage pulse V
WY, addressing electrode applies positive voltage pulse V
A, keep electrode and apply positive voltage pulse V
WX(V
WYWith V
ASum is greater than the firing voltage between scan electrode and addressing electrode), the pixel that address discharge is chosen this row enters by fired state, then finishes the addressing of this child field to whole screen image element after all line scannings.Accumulated positive wall electric charge on the dielectric layer of scan electrode, kept electrode and addressing electrode and accumulated negative wall electric charge, all unit of being lighted have all accumulated the wall electric charge at discharge space and have formed wall voltage, prepare for keeping discharge; Keeping interimly, each first cycle scan electrode of keeping the cycle applies positive voltage pulse V
YSAddressing electrode and keep electrode and keep ground state, compound discharge takes place on the basis of the wall electric charge that address period is produced by lighting unit, promptly between scan electrode and addressing electrode, carry out simultaneously the subtend discharge, scan electrode and keep and carry out surface-discharge between the electrode makes the reversal of poles of dielectric layer upper wall electric charge; Each second cycle scan electrode of keeping the cycle keeps ground state, and addressing electrode applies positive voltage pulse V
AS, keep electrode and apply positive voltage pulse V
XS, compound discharge is proceeded, and enters erasing period after the phase of keeping finishes; In erasing period, by an erasing pulse space charged particle under the discharge final state is neutralized, wipe simultaneously and light the wall electric charge that accumulates on the lighting unit.
As special circumstances, that can select scan electrode keeps voltage amplitude V
YS, keep voltage amplitude V
XSWith addressing voltage amplitude V
ASThe three gets identical numerical value, also can select to keep voltage amplitude V
XSWith addressing voltage amplitude V
ASThe two gets identical numerical value; The positive voltage pulse amplitude V of addressing electrode
AWith the positive voltage pulse amplitude V that keeps electrode
WXCan get identical numerical value.
Embodiment three.
Shown in Fig. 1,5.
At three electrode shadow mask plasma display panels shown in Figure 1, the scan electrode of prebasal plate 1 and keep on the electrode, apply drive waveforms as shown in Figure 5 on the addressing electrode of metacoxal plate 2, shadow mask adopts floating potential.In address period, scan electrode applies negative voltage pulse V
Wy, addressing electrode applies positive voltage pulse V
a, keep electrode and meet 0V voltage (V
WyWith V
aSum is greater than the firing voltage between scan electrode and addressing electrode), the pixel that address discharge is chosen this row enters by fired state, then finishes the addressing of this child field to whole screen image element after all line scannings.Accumulated positive wall electric charge on the dielectric layer of scan electrode, addressing electrode has accumulated negative wall electric charge, keep electrode and also accumulated partly negative wall electric charge, all unit of being lighted form wall voltage at the wall electric charge that discharge space all accumulates, and prepare for keeping discharge; Keeping interimly, each first cycle scan electrode of keeping the cycle applies positive voltage pulse V
Ys/2, keep electrode and apply negative voltage pulse V
Xs/2, addressing electrode applies negative voltage pulse V
As/2(V
Ys/2With V
Xs/2Sum is greater than scan electrode and keep and keep the required voltage of discharge, V between the electrode
Ys/2With V
As/2Sum is greater than keeping the required voltage of discharge between scan electrode and the addressing electrode), compound discharge takes place on the basis of the wall electric charge that address period is produced by lighting unit, promptly between scan electrode and addressing electrode, carry out simultaneously the subtend discharge, scan electrode and keep and carry out surface-discharge between the electrode makes the reversal of poles of dielectric layer upper wall electric charge; Each second cycle scan electrode of keeping the cycle applies negative voltage pulse V
Ys/2, addressing electrode applies positive voltage pulse V
Xs/2, keep electrode and apply positive voltage pulse V
Xs/2, compound discharge is proceeded, and enters erasing period after the phase of keeping finishes; In erasing period, by an erasing pulse space charged particle under the discharge final state is neutralized, wipe simultaneously and light the wall electric charge that accumulates on the lighting unit.
As special circumstances, that can select scan electrode keeps voltage amplitude V
Ys/2, keep voltage amplitude V
Xs/2With addressing voltage amplitude V
As/2The three gets identical numerical value, also can select to keep voltage amplitude V
Xs/2With addressing voltage amplitude V
As/2The two gets identical numerical value.
Claims (1)
1, a kind of composite display drive method of shadow mask plasma display panel, it is characterized in that on addressing electrode, applying waveform and make the compound discharge of formation in the display unit, described compound discharge is meant that the phase of keeping is by subtend discharge between scan electrode and the addressing electrode and scan electrode and keep the discharge that the surface-discharge between the electrode forms, concrete drive realize be in the phase of keeping each cycle of keeping be divided into upper and lower two stages: first cycle scan electrode applies positive voltage pulse, addressing electrode with keep electrode and all apply negative voltage pulse or ground connection; Second cycle scan electrode applies negative voltage pulse or ground connection, addressing electrode with keep electrode and all apply positive voltage pulse, the voltage amplitude of addressing electrode and the voltage amplitude of keeping electrode or identical or different.
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| CN101853627B (en) * | 2010-05-19 | 2011-12-14 | 东南大学 | Shadow mask type plasma display driving method |
| CN115107122B (en) * | 2022-06-06 | 2024-02-02 | 浙江鑫宙竹基复合材料科技有限公司 | Bio-based winding composite board and manufacturing method thereof |
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