CN103325334A

CN103325334A - Plasma display screen driving method

Info

Publication number: CN103325334A
Application number: CN2013102772967A
Authority: CN
Inventors: 陈修强; 杨正军; 周超; 高响
Original assignee: Sichuan COC Display Devices Co Ltd
Current assignee: Sichuan COC Display Devices Co Ltd
Priority date: 2013-07-04
Filing date: 2013-07-04
Publication date: 2013-09-25

Abstract

The invention relates to the field of a plasma display screen and especially relates to a plasma display screen driving method. A technical problem to be solved is that aiming at problems in the prior art, the invention provides a plasma display screen driving method, through forwardly adjusting the position of an addressing pulse, an overlapping part of an (N+1)th row scanning pulse and a back section of an Nth row addressing pulse is shortened, and the poor discharge of the (N+1)th row is avoided. The poor discharge of a plasma module is improved by the plasma display screen driving method, and the driving waveform of one frame of image of a plasma display screen comprises a plurality of sub fields. Each field comprises a reset period, an addressing period and a maintaining period. The addressing period is produced by the addressing discharge of an A electrode and a Y electrode, and the addressing period of the A electrode drives a pulse forward time T. The method is applied to the field of plasma display screen module driving.

Description

A kind of plasma display panel drive method

Technical field

The present invention relates to the plasma panel field, especially a kind of plasma display panel drive method that improves plasma module discharge failure.

Background technology

Plasma display (PDP) is one of flat-panel monitor of current main flow, and it is involuted by front-back baseboard.Made multipair show electrode pair parallel to each other on prebasal plate, each show electrode to by one group of scan electrode (Y electrode) with maintain electrode (X electrode) and form, show electrode on be coated with dielectric layer and protective seam.Make a plurality of data electrodes parallel to each other (A electrode) at metacoxal plate, be coated with dielectric layer on it, be manufactured with barrier on dielectric layer, and apply fluorescent powder.The mode of intersecting according to show electrode pair and data electrode, by being sealed after the front-back baseboard contraposition, pours discharge gas, at show electrode pair, with the opposed part of data electrode, forms discharge cell.

Figure 1 shows that address period address discharge schematic diagram, address period scan electrode Y electrode is scanned line by line, scanning impulse is low level (180v～200v), adjacent lines (for example N capable to N+1 capable) scanning impulse continuously every, need the capable addressing electrode A of the corresponding N of display unit electrode to send high level pulse (45～65v), between A electrode and Y electrode, address discharge occurs.CES half is high to be controlled is half that control addressing pulse to start with the ending segment output amplitude be addressing pulse.PDP module drive waveforms (accompanying drawing 1) mainly is comprised of reset period (reset), address period (address) and maintenance phase (sustain).The sparking electrode design mainly contains X-Y-X-Y, X-Y-Y-X, tri-kinds of arrangement modes of Y-X-X-Y.

Reset period: by ramp waveform, screen is applied to higher voltage, make all discharge cells produce electric discharge, and make each unit before address period starts, discharge condition reaches unanimity as far as possible.

Address period: the Y electrode applies scanning impulse, and the unit that needs are lighted applies the addressing pulse signal at the A electrode, makes the unit that need to light produce electric discharge, and accumulation wall electric charge, so that maintenance phase regular picture.

Maintenance phase: X, Y electrode alternately apply and maintain pulse signal, and the unit continuous discharge that need light is luminous.

The X-Y-X-Y type electrode spread of take is example, and schematic diagram is as Fig. 2 (Fig. 2 a, Fig. 2 b), (during address discharge, the charged particle that current line (N is capable) produces is movable to next line (N+1 is capable), and the address discharge of next line (N+1 is capable) is strengthened).Shown in (X-Y-Y-X, there is following problem equally in the Y-X-X-Y type) have following problem:

1) according to the plasma logic control, when scan pattern, when lining by line scan, the PDP address period is discharged by the scan electrode order, and does not have space between adjacent lines, and during address discharge, the charged particle that current line produces can be diffused into next line.For example, when N is capable while carrying out address discharge, produce a large amount of space charge (priming ion), it is capable that the segment space electric charge is diffused into N+1:

The diffusion of space charge, to screen discharge generation adverse effect.

2), after N line scanning address discharge completes, the space charge that the scanning address discharge produces is diffused into the capable discharge cell firing voltage of the capable N+1 of causing of N+1 to be reduced.While carrying out the N+1 line scanning, N+1 line scanning electrode (Y electrode) applies certain scanning voltage (approximately-190v), the capable addressing pulse back segment of N (zone shown in figure mono-ellipse, half that voltage is normal addressing voltage) will cause the capable unit do not shown of N+1 to misplace electricity with N+1 line scanning intersection.The unit generation overdischarge of the capable demonstration of N+1 or crosstalking property low discharge (with electrode, arranging relevant with discharge cell difference).

Summary of the invention

Technical matters to be solved by this invention is: for problems of the prior art, a kind of plasma display panel drive method that improves plasma module discharge failure is provided, by adjusting forward the position of addressing pulse, shorten the intersection of N+1 line scanning pulse and the capable addressing pulse back segment of N, avoid the capable discharge failure that occurs of N+1.

The technical solution used in the present invention is as follows:

A kind of plasma display panel drive method, the drive waveforms of plasma panel one frame picture comprises a plurality of subfields, each subfield comprises reset period, address period and maintenance phase, and address period is produced by A electrode, Y electrode generation address discharge, the Data driver pulse reach time T of described A electrode.

Further, before described T, shift time is identical or not identical.

Further, described T is 20ns-200ns.

Further, described T is 120ns.

Further, described T is 20ns.

Further, described T is 200ns.

In sum, owing to having adopted technique scheme, the invention has the beneficial effects as follows:

1) addressing pulse reach, avoided addressing pulse back segment and time line scanning pulse matching, or shortened the time of coincidence of addressing pulse back segment and time line scanning pulse, misplaces electricity while having prevented inferior line scanning.

2) addressing pulse reach, the scanning address discharge in advance, is conducive to the accumulation of Y electrode upper wall electric charge, reduces the space charge diffusion; The minimizing of space charge diffusion, avoid time row to occur that address discharge is bad.

The accompanying drawing explanation

Examples of the present invention will be described by way of reference to the accompanying drawings, wherein:

Fig. 1 plasma panel addressing pulse circuit discharging schematic diagram.

Fig. 2 plasma panel address discharge space ion diffusion schematic diagram.

Fig. 2 a is the capable address discharge schematic diagram of plasma panel n.

Fig. 2 b is that the ion of the capable address discharge of plasma panel n is diffused into the particle diffusion schematic diagram that n+1 is capable.

Fig. 3 the design ionic medium display screen addressing pulse circuit discharging schematic diagram.

Embodiment

Disclosed all features in this instructions, or the step in disclosed all methods or process, except mutually exclusive feature and/or step, all can combine by any way.

Disclosed arbitrary feature in this instructions (comprising any accessory claim, summary and accompanying drawing), unless special narration all can be replaced by other equivalences or the alternative features with similar purpose.That is,, unless special narration, each feature is an example in a series of equivalences or similar characteristics.

Embodiment mono-: a kind of plasma display panel drive method, the plasma panel drive waveforms comprises a plurality of subfields, each subfield comprises reset period, address period and maintenance phase, address period produces (the A electrode produces high level and overlaps fully with the low level that the Y electrode produces) by A electrode, Y electrode drive pulse generation address discharge, the Data driver pulse reach time T of described A electrode.As described in Figure 3, Data driver pulse reach time T, the scanning pulse driver of the Data driver pulse back segment of having avoided the capable A electrode of N to produce and time row (N+1 is capable) Y electrode generation overlaps fully, perhaps shorten the time of coincidence that the A electrode produces Data driver pulse back segment and time scanning pulse driver that row (N+1 is capable) Y electrode produces, misplaced electricity while having prevented inferior capable address scan.Data driver pulse reach time T, scanning address discharge T pre-set time, be conducive to the accumulation of scan electrode Y electrode upper wall electric charge, reduces the space charge diffusion; The minimizing of space charge diffusion, avoid time row to occur that address discharge is bad.Wherein high control of CES half is half that control addressing pulse to start with the ending segment output amplitude be addressing pulse, the Data driver pulse of A electrode is differential display unit and non-display unit, the unit A electrode that needs are shown applies the high level addressing pulse, non-display unit A electrode no-output.The scanning pulse driver of Y electrode is the scanning impulse that is applied to each row, and there is scanning impulse each unit, and address discharge occurs when the A electrode is high level.

Embodiment bis-: on embodiment mono-basis, before described address period driving pulse, shift time is identical or not identical.

Embodiment tri-: on embodiment mono-or two bases, described address period driving pulse reach time T is 20ns-200ns.Shift time and the bad power of overdischarge before concrete addressing, signal delay are relevant; When overdischarge is weak, address period driving pulse reach 20ns～120ns can improve, and when overdischarge is comparatively serious, address period driving pulse reach 120ns～200ns can better be improved.Select shift time before concrete address period driving pulse according to the bad and signal delay situation of actual discharge.

The present invention is not limited to aforesaid embodiment.The present invention expands to any new feature or any new combination disclosed in this manual, and the arbitrary new method disclosed or step or any new combination of process.

Claims

1. a plasma display panel drive method, the drive waveforms of plasma panel one frame picture comprises a plurality of subfields, each subfield comprises reset period, address period and maintenance phase, address period is produced by A electrode, Y electrode generation address discharge, it is characterized in that the Data driver pulse reach time T of described A electrode.

2. a kind of plasma display panel drive method according to claim 1, is characterized in that the front shift time of described T is identical or not identical.

3. a kind of plasma display panel drive method according to claim 1 and 2, is characterized in that described T is 20ns-200ns.

4. a kind of plasma display panel drive method according to claim 3, is characterized in that described T is 120ns.

5. a kind of plasma display panel drive method according to claim 3, is characterized in that described T is 20ns.

6. a kind of plasma display panel drive method according to claim 3, is characterized in that described T is 200ns.