CN101055694A - Plasma display apparatus - Google Patents

Plasma display apparatus Download PDF

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Publication number
CN101055694A
CN101055694A CNA2007100886614A CN200710088661A CN101055694A CN 101055694 A CN101055694 A CN 101055694A CN A2007100886614 A CNA2007100886614 A CN A2007100886614A CN 200710088661 A CN200710088661 A CN 200710088661A CN 101055694 A CN101055694 A CN 101055694A
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China
Prior art keywords
pulse
electrode
cycle
keeping
offered
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Pending
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CNA2007100886614A
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Chinese (zh)
Inventor
金泰亨
郭钟运
闵雄基
共炳球
文圣学
金外东
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LG Electronics Inc
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LG Electronics Inc
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Publication of CN101055694A publication Critical patent/CN101055694A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C17/00—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor
    • B60C17/04—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor utilising additional non-inflatable supports which become load-supporting in emergency
    • B60C17/06—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor utilising additional non-inflatable supports which become load-supporting in emergency resilient
    • B60C17/066—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor utilising additional non-inflatable supports which become load-supporting in emergency resilient made-up of plural spherical elements provided in the tyre chamber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C19/00—Tyre parts or constructions not otherwise provided for
    • B60C19/12—Puncture preventing arrangements
    • B60C19/127—Puncture preventing arrangements for inner tubes

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

Abstract

A method of driving a plasma display apparatus is provided. In the method, a positive first pulse and a negative second pulse are alternately supplied to a first electrode in a sustain period. A second electrode sustains a ground level in a second electrode while the positive first pulse is supplied to the first electrode. Then, the absolute voltage values of the positive first pulse and the negative second pulse are controlled to be different.

Description

Plasma display system
Technical field
The present invention relates to a kind of driving method of plasma display system.
Background technology
Usually, plasma display system comprises the Plasmia indicating panel that is used for display image and is arranged on the driver that is used to drive Plasmia indicating panel on the Plasmia indicating panel rear surface.
Plasmia indicating panel comprises upper substrate, with the infrabasal plate of the spaced apart preset distance of upper substrate, and is formed on the partition rib that is used to form a plurality of discharge cells between upper substrate and the infrabasal plate.Each unit is injected into discharge gas, neon (Ne) for example, helium (He), or the potpourri of neon and helium (Ne+He), and the inert gas that comprises small amount of xenon (Xe).Pixel is formed by red discharge cell R, green discharge cell G and blue discharge unit B.
When utilizing high-frequency impulse to cause discharge, inert gas produces vacuum ultraviolet and excites the fluorophor that cuts off between the rib with presentation video.
Plasmia indicating panel comprises a plurality of electrodes, and for example, scan electrode Y keeps electrode Z and addressing electrode X.Electrode provides the corresponding drivers of driving voltage to be connected with the electrode that is used for to Plasmia indicating panel.
When driving Plasmia indicating panel, each driver with predetermined period provide the corresponding driving pulse to the electrode of Plasmia indicating panel to excite discharge cell.For example, driver provided reset pulse, scanning impulse and keeps pulse in reset cycle, addressing period and the cycle of keeping.
Plasma display system is because its slim and light and handy characteristic is subjected to extensive concern as display device.
Summary of the invention
One aspect of the present invention provides a kind of driving method that is used for reducing the plasma display system of the luminance difference between the electrode wires when driving Plasmia indicating panel.
The present invention provides a kind of driving method that is used for the plasma display system of cost drive Plasmia indicating panel on the other hand.
Another aspect of the present invention provides a kind of driving method that is used for realizing the stable plasma display system of keeping discharge when driving Plasmia indicating panel.
On the one hand, provide a kind of driving method that a son (subfield) is divided into addressing period at least and keeps the plasma display system in cycle.In the method, in the cycle of keeping, first positive pulse and the second negative pulse are alternately offered first electrode.Then, when being offered first electrode, the first positive pulse make second electrode remain on ground level.The absolute voltage value of controlling first positive pulse and second pulse of bearing makes them different.
Embodiment can comprise one or more following features.For example, in the cycle of keeping, first positive pulse offered second pulse that second electrode will bear simultaneously and offer first electrode.
On the other hand, provide a kind of by a son field is divided into addressing period and the driving method of keeping the plasma display system in cycle at least.In the method, in the cycle of keeping, alternately provide first positive pulse with and the absolute voltage value less than second negative pulse of this first pulse.Then, when second pulse is offered first electrode, first positive pulse is offered second electrode.When first pulse is offered first electrode, second positive pulse is offered third electrode.
Another aspect provides a kind of by a son field is divided into addressing period and the driving method of keeping the plasma display system in cycle at least.In the method, in the cycle of keeping, will have the first positive pulse of identical absolute voltage value and the second negative pulse and alternately offer first electrode.Then, the 3rd pulse that will bear when the first positive pulse is offered first electrode offers second electrode.
Should be appreciated that aforementioned general description and ensuing detailed description are exemplary with indicative, purpose is invention required for protection is further explained.
Description of drawings
Below with reference to accompanying drawings embodiments of the invention are elaborated, wherein represent identical important document with identical Reference numeral.
Fig. 1 is the synoptic diagram that illustrates according to the plasma display system of the embodiment of the invention;
Fig. 2 illustrates the sequential chart that offers the drive waveforms of Plasmia indicating panel according to the embodiment of the invention;
Fig. 3 illustrates the sequential chart that offers scan electrode in the cycle and keep the driving pulse of electrode according to first embodiment of the invention keeping in Fig. 2;
Fig. 4 illustrates the sequential chart that offers scan electrode in the cycle and keep the driving pulse of electrode according to second embodiment of the invention keeping in Fig. 2;
Fig. 5 illustrates the sequential chart that offers scan electrode in the cycle and keep the driving pulse of electrode according to third embodiment of the invention keeping in Fig. 2;
Fig. 6 is the synoptic diagram that plasma display system according to another embodiment of the present invention is shown;
Fig. 7 is the sequential chart that the drive waveforms that offers Plasmia indicating panel according to another embodiment of the present invention is shown;
Fig. 8 is the sequential chart that the drive waveforms that offers Plasmia indicating panel according to another embodiment of the present invention is shown; And
Fig. 9 is the sequential chart that the drive waveforms that offers Plasmia indicating panel according to another embodiment of the present invention is shown.
Embodiment
Hereinafter, embodiments of the present invention is described in detail with reference to the accompanying drawings.
Fig. 1 is the synoptic diagram that illustrates according to the plasma display system of the embodiment of the invention.
With reference to Fig. 1, comprise according to the plasma display system of present embodiment: Plasmia indicating panel 50, addressing driver 52, scanner driver 54, time schedule controller 56, and driving voltage generator 58.
Plasmia indicating panel 50 comprises a plurality of first electrode Y1 to Yn and a plurality of second electrode Z1 to Zn that arranges with column direction, and a plurality of third electrode X1 to Xm that arrange with line direction.Hereinafter, the first electrode Y1 to Yn represents scan electrode, and the second electrode Z1 to Zn represents to keep electrode, and third electrode X1 to Xm represents addressing electrode.
Addressing driver 52 is by data clock DCLK with from the second switch control signal SCS2 control of time schedule controller 56 output, and from external unit view data offered addressing electrode X1 to Xm.
Scanner driver 54 offers scan electrode Y1 to Yn according to the first switch controlling signal SCS1 that time schedule controller 56 provides with reset pulse and scanning impulse.Scanner driver 54 will be as just the keeping pulse and keep pulse as second pulse negative and alternately offer scan electrode Y1 to Yn of first pulse, so that produce and keep discharge with the electrode Z1 to Zn that keeps that always receives bias voltage (being preferably ground voltage GND).
The electrode Z1 to Zn that keeps that is arranged on the Plasmia indicating panel 50 is connected with ground voltage source GND.That is, Plasmia indicating panel 50 does not comprise and is used to drive the driver of keeping electrode.Therefore, can reduce the manufacturing cost of plasma display system.Certainly plasma display system generally includes to be used to drive and keeps electrode and keep the driver that electrode provides predetermined electrical bias voltage to give, or control is kept electrode to keep ground voltage.
Driving voltage generator 58 produces multiple driving voltage producing predetermined drive waveforms, and the driving voltage that is produced is offered addressing driver 52 and scanner driver 54.
Time schedule controller 56 produces multiple switch controlling signal to produce predetermined drive waveforms and the switch controlling signal that is produced is offered addressing driver 52 and scanner driver 54.For example, time schedule controller 56 produces the first switching signal SCS1, and first switching signal that is produced is offered scanner driver 54.Time schedule controller 56 produces the second control signal SCS2 and data clock DCLK, and the second control signal SCS2 and data clock DCLK are offered addressing driver 52.
Hereinafter, with the driving method of describing according to the plasma display system of the embodiment of the invention.
Fig. 2 illustrates the sequential chart that offers the drive waveforms of Plasmia indicating panel according to the embodiment of the invention.
As shown in Figure 2, in driving method according to the plasma display system of present embodiment, by a son field being divided into the reset cycle of the unit that is used for initialization Plasmia indicating panel 50, be used to select the addressing period of the unit that will discharge, with be used to keep selected cell discharge keeping the cycle with display image, driving pulse is offered electrode X1 to Xm, each among the Y1 to Yn, Z1 to Zn.
In the reset cycle or the cycle of foundation, can the scan electrode Y1 to Yn that pulse offers Plasmia indicating panel 50 will be set up.Set up pulse and in the discharge cell of Plasmia indicating panel, cause weak discharge.In the cycle of removing, will offer scan electrode Y1 to Yn from keeping the pulse of removing that voltage Vs drops to predetermined voltage level.By the erasure discharge between armed sweep electrode Y1 to Yn and the addressing electrode X1 to Xm, positive wall electric charge and negative wall electric charge can be removed from the unit fully.
In addressing period, the negative scanning impulse that descends from scan reference voltage (Vsc) can be offered scan electrode Y1 to Yn.In addition, the positive data pulse corresponding to described scanning impulse can be offered addressing electrode X1 to Xm.When wall voltage that the voltage difference between scanning impulse and the data pulse is increased in the reset cycle to be produced, in the discharge cell that receives data pulse, cause address discharge.In the selected discharge cell of address discharge, form the wall electric charge that is enough to cause discharge when keeping voltage (Vs) when providing.
In the cycle of keeping, first pulse and second pulse are alternately offered scan electrode Y1 to Yn.Predetermined bias can be offered and keep electrode Z1 to Zn.Preferably, keep electrode Z1 to Zn and can keep ground voltage.
Keep electrode and keep the predetermined electrical bias voltage that has as above-mentioned by making, can omit and be used to drive the driving circuit of keeping electrode.Thereby can reduce manufacturing cost.
First pulse is to rise to from negative voltage-Vs+Va just to keep voltage Vs and maintain the pulse of just keeping the voltage Vs schedule time.Second pulse is from just keeping the pulse that voltage Vs drops to negative voltage-Vs+Va and maintains negative voltage-Vs+Va schedule time.
Hereinafter, with reference to Fig. 3 first and second pulses are described in more detail.
Although do not illustrate in the accompanying drawings, erase cycle can be included in keeps all after dates, so that at scan electrode or keep electrode and cause and to wipe the wall electric charge after keeping discharge.
Fig. 3 illustrates the sequential chart that offers scan electrode in the cycle and keep the driving pulse of electrode according to first embodiment of the invention keeping in Fig. 2.
With reference to Fig. 3, in the cycle of keeping, alternately first pulse is offered scan electrode and second pulse is offered first electrode, and make and keep electrode and keep ground voltage.In this case, can make its difference, revise luminance difference by the absolute voltage value of controlling first and second pulses.
Can control the absolute voltage value of first and second pulses according to the drive characteristic of Plasmia indicating panel.
Although the absolute voltage value of first pulse in Fig. 3 is greater than the absolute voltage value of second pulse, can be according to the absolute voltage value of drive characteristic second pulse of Plasmia indicating panel greater than the absolute voltage value of first pulse.
In this case, in addressing period, the difference between the absolute voltage value of first and second pulses can equal to offer the voltage (Va) of the data pulse of third electrode substantially.
In addition, according to the drive characteristic of Plasmia indicating panel, in addressing period, the difference between the absolute voltage value of first and second pulses can be controlled in the voltage range of the data pulse that offers third electrode.For example, if if when Plasmia indicating panel is driven, in a son, produces the luminance difference between the electrode or keep discharge instability, then control difference between the absolute voltage value of first and second pulses to compensate the unsettled discharge of keeping.
Fig. 4 illustrates the sequential chart that offers scan electrode in the cycle and keep the driving pulse of electrode according to second embodiment of the invention keeping in Fig. 2.
As shown in Figure 4, in the cycle of keeping, alternately first pulse is offered scan electrode and second pulse is offered first electrode, and make and keep electrode and keep ground level.In this case, the rising cycle E1 that rises to first pulse of just keeping voltage Vs from negative voltage-Vs+Va is shorter than from just keeping E2 decline cycle that voltage Vs drops to second pulse of negative voltage-Vs+Va.
The rising cycle of first pulse can differently be set according to the drive characteristic of Plasmia indicating panel.Yet, can be set to greater than 300ns by the rise time of first pulse and improve the drive characteristic of Plasmia indicating panel less than 1ms effectively.
Ratio between the decline cycle of the rising cycle of first pulse and second pulse can differently be set according to the drive characteristic of Plasmia indicating panel.Ratio between the rising cycle that can be by first pulse and the decline cycle of second pulse is set to greater than 1: 1.2 with less than the driving surplus of further guaranteeing Plasmia indicating panel at 1: 1.5 (driving margin).
Rising cycle E1 and decline cycle E2 can be expressed as the slope of corresponding pulses.That is, its absolute value of slope that can be expressed as first pulse is greater than the absolute value of the slope of second pulse.
As mentioned above, even can come the luminance difference between the further compensating electrode line by first pulse with rising cycle E1 shorter than E2 decline cycle of second pulse is provided to scan electrode.
Fig. 5 illustrates the sequential chart that offers scan electrode in the cycle and keep the driving pulse of electrode according to third embodiment of the invention keeping in Fig. 2.
As shown in Figure 5, in the cycle of keeping, alternately first pulse is offered scan electrode and second pulse is offered first electrode, and make and keep electrode and keep ground level.In this case, wherein first pulse remains on the first pulsed bias cycle D1 that just keeps voltage Vs and is shorter than the second pulsed bias cycle D2 that wherein second pulse remains on negative voltage-Vs+Va.
The first pulsed bias cycle D1 can differently be provided with according to the drive characteristic of Plasmia indicating panel.Yet, can be set to greater than 500ns and improve the drive characteristic of Plasmia indicating panel less than 2ms effectively by the first pulsed bias cycle D1.
In addition, ratio between the first pulsed bias cycle D1 and the second pulsed bias cycle D2 can differently be set according to the drive characteristic of Plasmia indicating panel.Can be set to greater than 1: 1.3 with less than the driving surplus of further guaranteeing Plasmia indicating panel at 1: 1.8 by the ratio between the cycle by the first pulsed bias cycle and second pulsed bias.
As mentioned above, even can come the luminance difference between the further compensating electrode line by first pulse with biasing cycle D1 shorter than the second pulsed bias cycle D2 is provided to scan electrode.
In some embodiments of the invention, in the cycle of keeping, first pulse and second pulse are alternately offered scan electrode, and make and keep electrode and keep ground level.Yet, also may provide first pulse and second pulse, and make scan electrode keep ground level to keeping electrode.
In some embodiments of the invention, in the cycle of keeping, driving pulse is offered scan electrode, control the rise time and the fall time of this driving pulse independently and offer scan electrode, and biasing cycle of controlling and driving pulse and offer scan electrode.Yet, can offer scan electrode by rise time, fall time and the biasing cycle of while controlling and driving pulse and with them, further improve the luminance difference between electrode wires or the drive characteristic of Plasmia indicating panel.
Not only can be applicable to scan electrode-keep electrode-scan electrode-keep the electrode spread of electrode YZYZ according to the driving pulse of present embodiment, also can be applied to scan electrode-scan electrode-keep electrode-keep electrode spread of electrode YYZZ.
Fig. 6 is the synoptic diagram that plasma display system according to another embodiment of the present invention is shown.
With reference to Fig. 6, plasma display system comprises Plasmia indicating panel 50 according to another embodiment of the present invention, addressing driver 52, and scanner driver 54, time schedule controller 56 and driving voltage generator 58, it is identical with plasma display system shown in Figure 1.Therefore, the descriptions thereof are omitted at this.
Keep the 3rd switch controlling signal SCS3 control that driver 60 provides by time schedule controller 56 and positive voltage or negative voltage offered and keep electrode Z1 to Zn.
The driving method of plasma display system according to an embodiment of the invention is described hereinafter, with reference to the accompanying drawings.
Fig. 7 is the sequential chart that the drive waveforms that offers Plasmia indicating panel according to another embodiment of the present invention is shown.
Referring to Fig. 7, the drive waveforms that offers Plasmia indicating panel in the reset cycle with addressing period according to another embodiment is with shown in Figure 2 identical.Therefore, omit description at this to the drive waveforms that in reset cycle and addressing period, is provided.
Opposite, in another embodiment of the present invention, in the cycle of setting up, positive bias voltage Rp can be offered addressing electrode X1 to Xm.Positive bias voltage can further reduce the intensity in the dark discharge of reset cycle generation.
In the cycle of keeping, first pulse and second pulse with different absolute voltages are alternately offered scan electrode, and can be when second pulse is offered scan electrode the first positive pulse Pp1 be offered and keep electrode.As a result, can improve scan electrode and keep surface-discharge between the electrode, and can further improve scan electrode and keep luminance difference between the electrode.In this case, when being offered scan electrode, first pulse second positive pulse Pp2 can be offered addressing electrode.The infringement to fluorophor that the wall electric charge caused when the second positive pulse Pp2 can reduce to discharge can improve surface-discharge simultaneously.
The voltage that offers first and second positive pulses of keeping electrode and scan electrode approximately has the voltage level of the relative discharge (opposed discharge) that can not cause between scan electrode and the addressing electrode.Preferably, the voltage of first and second positive pulses is consistent with the voltage of the data pulse that offers addressing electrode basically.Therefore, can reduce the cost of the driving circuit that is used to drive Plasmia indicating panel.
Fig. 8 is the sequential chart that the drive waveforms that offers Plasmia indicating panel according to another embodiment of the present invention is shown.
As shown in Figure 8, offer the drive waveforms of Plasmia indicating panel with identical shown in Fig. 7 according to another embodiment of the present invention.Therefore, at this omission is described for it.
Yet data electrode keeps ground connection in the cycle of keeping.
Fig. 9 is the sequential chart that the drive waveforms that offers Plasmia indicating panel according to still another embodiment of the invention is shown.
As shown in Figure 9, offer the drive waveforms of Plasmia indicating panel identical with shown in Fig. 7.Therefore, at this omission is described for it.
Yet, in the cycle of keeping, first pulse and second pulse with substantially the same absolute voltage value alternately can be offered scan electrode, and the 3rd pulse Np that can will bear offers and keeps electrode when first pulse is offered scan electrode.In this case, the absolute value of the 3rd pulse can be substantially equal to offer the voltage of the data pulse of addressing electrode in addressing period.
As mentioned above, can be by according to the luminance difference between the driving method compensating electrode of the Plasmia indicating panel of present embodiment.

Claims (22)

1. one kind drives the method for plasma display system by a son field being divided at least addressing period and the cycle of keeping, and comprising:
In the cycle of keeping, alternately first positive pulse and the second negative pulse are offered first electrode;
When being offered first electrode, the first positive pulse keeps ground level at second electrode; And
The absolute voltage value of controlling first positive pulse and second pulse of bearing makes them different.
2. the method for claim 1 wherein in the cycle of keeping, offers second electrode with the first positive pulse when second pulse that will bear offers first electrode.
3. method as claimed in claim 2, wherein this second electrode keeps predetermined voltage at addressing period.
4. method as claimed in claim 2, wherein third electrode keeps ground level in the cycle of keeping.
5. method as claimed in claim 4, wherein when second pulse that will bear was provided to first electrode, this third electrode kept ground level.
6. method as claimed in claim 2 wherein when the first positive pulse is offered first electrode, offers third electrode with second positive pulse.
7. the method for claim 1, wherein the absolute voltage value of this first pulse is greater than the absolute voltage value of second pulse.
8. the method for claim 1, wherein the difference between the absolute voltage value of this first and second pulse is substantially equal to offer the voltage of the data pulse of third electrode.
9. the method for claim 1, wherein the rising cycle of this first positive pulse is shorter than the rising cycle of the second negative pulse.
10. method as claimed in claim 9, wherein the rise time of this first pulse is greater than about 300ns and less than about 1ms.
11. method as claimed in claim 9, wherein the ratio between the fall time of the rise time of this first pulse and second pulse is greater than about 1: 1.2 with less than about 1: 1.5.
12. the method for claim 1, wherein the biasing cycle of this first positive pulse is shorter than the biasing cycle of the second negative pulse.
13. method as claimed in claim 12, wherein the biasing cycle of this first pulse is greater than about 500ns and less than about 2ms.
14. method as claimed in claim 12, wherein the ratio between the biasing phase of the biasing cycle of this first pulse and second pulse is greater than about 1: 1.3 with less than about 1: 1.8.
15. one kind drives the method for plasma display system by a son field being divided at least addressing period and the cycle of keeping, and comprising:
First positive pulse and the absolute voltage value second little negative pulse than this first pulse alternately was provided in the cycle of keeping;
When this second pulse is offered first electrode, first positive pulse is offered second electrode; And
When this first pulse is offered first electrode, second positive pulse is offered third electrode.
16. method as claimed in claim 15, wherein this second electrode keeps predetermined voltage at addressing period.
17. method as claimed in claim 15, the voltage of first positive pulse that wherein offers second electrode is less than the voltage of second positive pulse that offers third electrode.
18. method as claimed in claim 15 wherein in the reset cycle before addressing period, offers third electrode with positive bias voltage.
19. one kind drives the method for plasma display system by a son field being divided at least addressing period and the cycle of keeping, and comprising:
The first positive pulse and the second negative pulse that alternately will have identical absolute voltage value in the cycle of keeping offer first electrode; And
When the first positive pulse is offered first electrode, the 3rd negative pulse is offered second electrode.
20. method as claimed in claim 19, wherein the absolute voltage value of the 3rd pulse is substantially equal to offer at addressing period the voltage of the data pulse of third electrode.
21. method as claimed in claim 20, wherein this third electrode keeps ground level in the cycle of keeping.
22. method as claimed in claim 19, wherein this second electrode keeps predetermined voltage at addressing period.
CNA2007100886614A 2006-03-14 2007-03-14 Plasma display apparatus Pending CN101055694A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
KR1020060023589 2006-03-14
KR1020060023589A KR100801702B1 (en) 2006-03-14 2006-03-14 Method for driving plasma display panel
KR1020060047834 2006-05-26

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4768134B2 (en) 2001-01-19 2011-09-07 日立プラズマディスプレイ株式会社 Driving method of plasma display device
JP2004004513A (en) * 2002-04-25 2004-01-08 Fujitsu Hitachi Plasma Display Ltd Driving method for plasma display panel, and plasma display device
KR100549669B1 (en) * 2004-03-22 2006-02-08 엘지전자 주식회사 Method of Driving Plasma Display Panel

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KR20070093580A (en) 2007-09-19

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Open date: 20071017