CN103903552A

CN103903552A - Plasma displayer driving method

Info

Publication number: CN103903552A
Application number: CN201410094043.0A
Authority: CN
Inventors: 周超; 虞尚友; 陈修强; 卫伟; 杨发明
Original assignee: Sichuan COC Display Devices Co Ltd
Current assignee: Sichuan COC Display Devices Co Ltd
Priority date: 2014-03-14
Filing date: 2014-03-14
Publication date: 2014-07-02

Abstract

The invention provides a plasma displayer driving method. In detail, the method includes the steps that an input LVDS signal is processed, calculation amount of the number of addressing on-off times is increased, the time sequence of X/Y electrode output waveforms is controlled through the addressing switch number, and a final maintaining pulse length is adjusted. The addressing discharging intensity can be effectively adjusted, and the discharging problem caused by excessively strong addressing discharging intensity or excessively weak addressing discharging intensity is avoided.

Description

A kind of method for driving plasma display device

Technical field

The present invention relates to a kind of method for driving plasma display device, particularly relate to one and be applicable to, in the time showing different pictures, take into account the method for driving plasma display device of controlling address discharge power.

Background technology

PDP module drive waveforms is mainly made up of reset period, address period and maintenance phase, as depicted in figs. 1 and 2, has represented a drive waveforms that subfield is complete.

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: Y electrode applies scanning impulse, and the unit that needs are lighted applies addressing pulse signal at A electrode, makes the unit that need to light produce electric discharge, and again accumulates 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.

Last length that maintains pulse of maintenance phase has considerable influence to next subfield reset period, address period electric discharge:

1) last to maintain pulse long, easily accumulate wall electric charge, next subfield reset period electric discharge is many, address discharge is strong, benefit is to reduce the low discharge that address discharge unsuccessfully causes; When harm is address discharge, crosstalk in unit easy and adjacent lines, causes crosstalking property low discharge bad, particularly under some search switches picture often.

2) last to maintain pulse short, accumulation wall electric charge is few, can reduce the possibility that address discharge is crosstalked, but also can increase the risk of low discharge generation.

Maintain pulse length and avoid producing or improving corresponding discharge failure for last is suitably set, general measures is to set fixing last according to different APL, different subfields to maintain pulse length.But there is certain limitation, in the time showing different pictures, be difficult to take into account control address discharge power.

Summary of the invention

The technical problem to be solved in the present invention is to provide a kind of method for driving plasma display device of avoiding producing discharge failure.

The technical solution used in the present invention is as follows: a kind of method for driving plasma display device, concrete grammar is: to the processing of input LVDS signal, increase the calculating of search switch number, and by the sequential of search switch numerical control X/Y electrode processed output waveform, last maintains pulse length to adjust last subfield.

Further, be divided into 2 above intervals according to the search switch number of times of current subfield, last maintains the length of pulse according to demarcation interval, last subfield to be set.

Further, from small to large, last maintains last subfield pulse length and arranges from long to short in the interval of counting place according to current subfield search switch.

Current subfield search switch number is in 0～200000 interval, arrange last subfield last to maintain pulse length be 40us.

Current subfield search switch number is in 200001～500000 intervals, arrange last subfield last to maintain pulse length be 20us.

Current subfield search switch number is in 500001～800000 intervals, arrange last subfield last to maintain pulse length be 10us.

Current subfield search switch number is in 800001～1179648 intervals, arrange last subfield last to maintain pulse length be 5us.

Compared with prior art, the invention has the beneficial effects as follows: effectively adjust address discharge intensity according to different pictures, avoid the electric discharge problem of crossing by force or causing excessively because of address discharge.

Brief description of the drawings

Fig. 1 is drive waveforms composition schematic diagram.

Fig. 2 is plasma display electrode structure schematic diagram.

Fig. 3 is that search switch number of times calculates schematic diagram.

Fig. 4 is that picture view is lighted in interlacing.

Fig. 5 is that interlacing is lighted picture and had the schematic diagram of 384 addressing.

Fig. 6 needs shorter last of setting to maintain the schematic diagram of pulse.

Fig. 7 is the search switch situation schematic diagram of white field or an electrode of monochromatic field.

Fig. 8 needs long last of setting to maintain the schematic diagram of pulse.

Embodiment

In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.

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

As shown in Figure 3, a kind of method for driving plasma display device, concrete grammar is: to the processing of input LVDS signal, increase the calculating of search switch number, and by the sequential of search switch numerical control X/Y electrode processed output waveform, last maintains pulse length to adjust last subfield.

Search switch picture often, under progressive scanning mode, the picture that interlacing is lighted, has switch No. 384 times at the address signal of an add electrode output of a subfield.As shown in Figure 5, under this picture of 768 behavior example, easily produce and crosstalk, the part charged particle that current line address discharge produces is gone to next line, cause next line because reducing with wall electric charge in weak discharge or charged particle, cause next subfield low discharge (i.e. crosstalking property low discharge).Therefore, need to maintain pulse length in shorter last of current subfield setting, as shown in Figure 6, to reduce next subfield address discharge intensity.

The picture that search switch number of times is few, Ru Baichang, red/green/blue monochromatic field etc., at a subfield 768 row standard-sized sheets, only have switch No. 1 time, as shown in Figure 7.Under this picture, crosstalk and be difficult for occurring, long last can be set and maintain pulse length, as shown in Figure 8, to avoid occurring that the low discharge causing a little less than address discharge is is bad.

Plasma panel taking resolution as 1024*768 is example, and subfield maximum address on-off times=384*1024*3=1179648 time, can be divided into search switch number of times 4 intervals, as 0～200000,200001～500000,500001～800000,800001～1179648.

Claims

1. a method for driving plasma display device, concrete grammar is: to the processing of input LVDS signal, increase the calculating of search switch number, and by the sequential of search switch numerical control X/Y electrode processed output waveform, last maintains pulse length to adjust last subfield.

2. driving method according to claim 1, is divided into 2 above intervals according to the search switch number of times of current subfield, and last maintains the length of pulse according to demarcation interval, last subfield to be set.

3. driving method according to claim 2, from small to large, last maintains last subfield pulse length and arranges from long to short in the interval of counting place according to current subfield search switch.

4. driving method according to claim 3, current subfield search switch number is in 0～200000 interval, arrange last subfield last to maintain pulse length be 40us.

5. driving method according to claim 3, current subfield search switch number is in 200001～500000 intervals, arrange last subfield last to maintain pulse length be 20us.

6. driving method according to claim 3, current subfield search switch number is in 500001～800000 intervals, arrange last subfield last to maintain pulse length be 10us.

7. driving method according to claim 3, current subfield search switch number is in 800001～1179648 intervals, arrange last subfield last to maintain pulse length be 5us.