CN100371969C - Method for improving image quality and contrast of plasma display - Google Patents
Method for improving image quality and contrast of plasma display Download PDFInfo
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- CN100371969C CN100371969C CNB2005100961777A CN200510096177A CN100371969C CN 100371969 C CN100371969 C CN 100371969C CN B2005100961777 A CNB2005100961777 A CN B2005100961777A CN 200510096177 A CN200510096177 A CN 200510096177A CN 100371969 C CN100371969 C CN 100371969C
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Abstract
The present invention discloses a method for improving the image quality and contrast of a plasma display. The present invention realizes the change of a field time by shifting the synchronous pulse of a field and adjusting the length of the maintaining periods of a light field and a dark field, the preparing period and the addressing period are kept unchanged, the maintaining period is changed naturally so that the number of maintaining pulses is adjusted, and the image quality of the light field and the dark field can be improved.
Description
Technical field
The present invention relates to the field that manufactures and designs of plasma flat-panel display, the picture quality and the contrast improvement method that relate to a kind of plasma display, this method by adjust one field system chronizing impulse move the length of adjusting a field time, under the constant prerequisite of hold reset phase and address period, can adjust the phase of keeping, keep umber of pulse thereby can adjust, bright field and details in a play not acted out on stage, but told through dialogues image quality are all had improved action, contrast has also been played the effect that improves.
Background technology
The AC plasma flat-panel monitor is that parallel the distribution kept electrode X, Y electrode on upper substrate, is distributed with the addressing electrode A vertical with X, Y electrode and R, G, B three primary colors fluorescent powder groove (Fig. 1) on infrabasal plate.Keeping making alive on electrode X/Y, the addressing electrode A, utilizing at electrode surface discharge, the luminous image of realizing of excitated fluorescent powder shows.Its gray scale shows and adopts sub-field technology of addressing display separation (ADS technology), i.e. eight sons of a branch, each son are divided into preparatory stage, address period again and keep the phase.
The brightness of one field picture mainly be by in one lighting unit keep the decision of pulse sum, so the brightness that the umber of pulse that the phase is kept in control just can the control chart picture.But present AC plasma flat-panel monitor (AC PDP) no matter bright field or details in a play not acted out on stage, but told through dialogues in demonstration, the umber of pulse of keeping in equates.Can occur like this that picture quality is bad, power consumption reaches the not high problem of contrast more greatly.But for every field picture of input, if keep umber of pulse very little, contrast will reduce; If it is too many to keep umber of pulse, even details in a play not acted out on stage, but told through dialogues also can brighten so, though contrast also can improve, but power consumption can increase, the temperature during the demonstration also can raise, the bad stability of circuit, the life-span of display also can shorten.So,,, need like this to shorten and keep time phase corresponding time that will shorten one if darkfield image is wished to keep umber of pulse and reduced for the image of input; For bright-field image, wish that keeping umber of pulse increases, in requisition for the time that prolongs one.
Summary of the invention
The objective of the invention is to, a kind of picture quality and contrast improvement method of plasma display are provided, this method is by moving one field system chronizing impulse, realize the change of a field time, keep preparatory stage and address period time constant, the time of keeping the phase obtains change naturally, thereby can make bright field and dark field image quality improve to keeping umber of pulse adjustment.
In order to realize above-mentioned task, the present invention takes following technical scheme:
A kind of picture quality of plasma display and contrast improvement method is characterized in that, comprise the following steps:
1. the picture quality of a plasma display and contrast improvement method is characterized in that, comprise the following steps:
1) in the time that shows a field picture, is divided into the plurality of sub field, each son field is by the preparatory stage, the address period and the phase of keeping are formed, address period is used to finish the accumulation to the wall electric charge of full frame each display unit, the phase of keeping is used for adding suitable voltage to keeping electrode X, Y, make the firing voltage of the value sum of this voltage and wall voltage, make display unit luminous, keep of the weight decision of time phase by the son field greater than gas;
2) different sub combinations can form various required gray shade scales; Preparatory stage utilizes two slope pulses to finish wiping and the consistance adjustment of discharge space charged particle, and the pulse of previous slope is wiped particle, and a back slope pulse is carried out the consistance adjustment to residual particles;
3) in processing procedure to field picture data, the sub-field data of weight maximum is wherein added up, when greater than setting value, think bright field; Described bright field setting value must be greater than 60% of total statistical value;
When four sub-field data of weight maximum were added up, if statistical value during less than setting value, thinks that this is details in a play not acted out on stage, but told through dialogues, described details in a play not acted out on stage, but told through dialogues setting value must be less than 8% of total statistical value, and the weight limit statistical value is not more than 5% of weight limit statistics sum;
4) for the bright field or the details in a play not acted out on stage, but told through dialogues of statistics,,, increase or reduce and keep number of pulses, thereby change one time length, adjust and keep the time length of phase by moving of mobile one field system chronizing impulse keeping under the constant situation of preparatory stage and address period;
For details in a play not acted out on stage, but told through dialogues, will move behind the field system chronizing impulse, the field system chronizing impulse reach of next, thus one time is shortened; For bright field, with field system chronizing impulse reach, move behind the field system chronizing impulse of next, thereby with one time lengthening;
When bright field statistical value and details in a play not acted out on stage, but told through dialogues statistical value do not meet the demands, do not change the number of pulses of the phase of keeping;
When being bright field for continuous two or when continuously bright field is details in a play not acted out on stage, but told through dialogues, do not change the number of pulses of the phase of keeping.
The present invention changes and keeps the phase umber of pulse by to the moving of field system chronizing impulse, and has improved the picture quality of bright field and details in a play not acted out on stage, but told through dialogues, has improved contrast.
Description of drawings
Fig. 1 is the basic block diagram of three-electrode surface discharge type AC-PDP;
Fig. 2 is for adopting eight a sons schematic diagram that 256 grades of gray scales of realization show, wherein grey is represented reset period, and white portion is represented address period, and black is partly represented the phase of keeping.SF1: SF2: SF3: SF4: SF5: SF6: SF 7: SF8 wherein :=1: 2: 4: 8: 16: 32; 64; 128;
Fig. 3 is the drive waveforms figure of a son field;
Figure 4 shows that one eight sub is kept phase distributed wave synoptic diagram, represent with black patch among the figure, keeping the phase umber of pulse and distribute by weight proportion, is n if first son is kept umber of pulse, and then to keep umber of pulse be n: 2n: 4n: 8n: 16n: 32n: 64n: 128n in each height field.
Fig. 5 keeps the umber of pulse synoptic diagram for the bright field increase;
Fig. 6 keeps phase distributed wave synoptic diagram for adjusting bright field later;
Fig. 7 keeps the umber of pulse synoptic diagram for details in a play not acted out on stage, but told through dialogues reduces;
Fig. 8 keeps phase distributed wave synoptic diagram for adjusting details in a play not acted out on stage, but told through dialogues later.
The present invention is described in further detail below in conjunction with accompanying drawing.
Embodiment
Referring to accompanying drawing, the highest the 8th in the power wherein of only need adding up according to technique scheme for data from interface input, if when statistical value is greater than certain value (by the actual conditions value) when field data statistics finishes, can think bright field; For data from interface input, the weight wherein of adding up is the highest 4, when one statistical value during less than certain value (by the actual conditions value), can think details in a play not acted out on stage, but told through dialogues.For details in a play not acted out on stage, but told through dialogues, can move behind the field system chronizing impulse with this, the field system chronizing impulse reach of next, thus one time is shortened; For bright field, the field system chronizing impulse reach with this moves behind field system chronizing impulse of next, thereby with one time lengthening.No matter at bright field or in details in a play not acted out on stage, but told through dialogues, keeping to adjust the length of keeping time phase under the constant situation of preparatory stage and address period, thereby adjusting the quantity of keeping pulse.
Be divided into the plurality of sub field in the time that shows a field picture, present embodiment adopts eight sons, 256 grades of gray scales of realization to show (Fig. 2), and wherein grey is represented reset period, and white portion is represented address period, and black is partly represented the phase of keeping.SF1: SF2: SF3: SF4: SF5: SF6: SF7: SF8 wherein :=1: 2: 4: 8: 16: 32; 64; 128; Each son field is by the preparatory stage, the address period and the phase of keeping are formed, address period is used to finish the accumulation to the wall electric charge of full frame each display unit, the phase of keeping is used for adding suitable voltage to keeping electrode X, Y, make the firing voltage of the value sum of this voltage and wall voltage greater than gas, make display unit luminous, keep of the weight decision of time phase by the son field;
The combination of different sons field can form various required gray shade scales; Preparatory stage utilizes two slope pulses to finish wiping and the consistance adjustment of discharge space charged particle, the pulse of previous slope is wiped particle, the slope pulse in back is carried out consistance adjustment (Fig. 3) to residual particles, adopt this waveform to greatly reduce background luminance, contrast is had very large raising.
In processing procedure to field picture data, the sub-field data of weight maximum is wherein added up, when greater than setting value, think bright field; When four sub-field data of weight maximum are added up, if statistical value during less than setting value, thinks that this is details in a play not acted out on stage, but told through dialogues;
When bright field statistical value and details in a play not acted out on stage, but told through dialogues statistical value do not meet the demands, do not change the number of pulses of the phase of keeping; When being bright field for continuous two or when continuously bright field is details in a play not acted out on stage, but told through dialogues, do not change the number of pulses of the phase of keeping equally.
For the bright field or the details in a play not acted out on stage, but told through dialogues of statistics, keeping under the constant situation of preparatory stage and address period,, increase or reduce and keep number of pulses, thereby change one time length by moving of mobile one field system chronizing impulse, adjust and keep the time length of phase;
For example during greater than setting value, can think that this is a bright field at the weight most significant digit statistical value of interface input signal, need increase and keep umber of pulse in order to improve brightness this moment.By the moving field synchronizing pulse, one time can be extended (Fig. 5).
Adjust bright field later and keep phase distributed wave synoptic diagram, adjustedly keep time phase and become big, keep umber of pulse and increase, improved the brightness (Fig. 6) of bright field.
Can think that this is details in a play not acted out on stage, but told through dialogues at the highest 4 statistical values of the weight of interface input signal during less than setting value, need reduce and keep umber of pulse in order to reduce brightness this moment.By the moving field synchronizing pulse, can be shortened (Fig. 7) one time, when the moving field synchronizing pulse, mobile range can not be greater than 5% of a field time.
Fig. 8 adjusts details in a play not acted out on stage, but told through dialogues later to keep phase distributed wave synoptic diagram, adjustedly keeps time phase and shortens, and keeps umber of pulse and reduces, and has reduced the brightness of details in a play not acted out on stage, but told through dialogues.
Claims (2)
1. the picture quality of a plasma display and contrast improvement method is characterized in that, comprise the following steps:
1) in the time that shows a field picture, is divided into the plurality of sub field, each son field is by the preparatory stage, the address period and the phase of keeping are formed, address period is used to finish the accumulation to the wall electric charge of full frame each display unit, the phase of keeping is used for adding suitable voltage to keeping electrode X, Y, make the firing voltage of the value sum of this voltage and wall voltage, make display unit luminous, keep of the weight decision of time phase by the son field greater than gas;
2) different sub combinations can form various required gray shade scales; Preparatory stage utilizes two slope pulses to finish wiping and the consistance adjustment of discharge space charged particle, and the pulse of previous slope is wiped particle, and a back slope pulse is carried out the consistance adjustment to residual particles;
3) in processing procedure to field picture data, the sub-field data of weight maximum is wherein added up, when greater than setting value, think bright field; Described bright field setting value must be greater than 60% of total statistical value;
When four sub-field data of weight maximum were added up, if statistical value during less than setting value, thinks that this is details in a play not acted out on stage, but told through dialogues, described details in a play not acted out on stage, but told through dialogues setting value must be less than 8% of total statistical value, and the weight limit statistical value is not more than 5% of weight limit statistics sum;
4) for the bright field or the details in a play not acted out on stage, but told through dialogues of statistics, keeping under the constant situation of preparatory stage and address period, by moving one field system chronizing impulse, number of pulses is kept in increase or minimizing, thereby changes one time length, adjusts and keeps the time length of phase;
For details in a play not acted out on stage, but told through dialogues, will move behind the field system chronizing impulse, the field system chronizing impulse reach of next, thus one time is shortened; For bright field, with field system chronizing impulse reach, move behind the field system chronizing impulse of next, thereby with one time lengthening;
When bright field statistical value and details in a play not acted out on stage, but told through dialogues statistical value do not meet the demands, do not change the number of pulses of the phase of keeping;
When being bright field for continuous two or continuous two when being details in a play not acted out on stage, but told through dialogues, do not change the number of pulses of the phase of keeping.
2. the method for claim 1 is characterized in that, during described moving field synchronizing pulse, mobile range is not more than 5% of a field time.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2005100961777A CN100371969C (en) | 2005-10-14 | 2005-10-14 | Method for improving image quality and contrast of plasma display |
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| CNB2005100961777A CN100371969C (en) | 2005-10-14 | 2005-10-14 | Method for improving image quality and contrast of plasma display |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101207709B (en) * | 2006-12-22 | 2010-08-18 | 深圳创维－Rgb电子有限公司 | Method, device for regulating gamma curviline |
| CN101257597A (en) * | 2008-03-18 | 2008-09-03 | 四川长虹电器股份有限公司 | Method for eliminating screen glitter |
| CN103794173A (en) * | 2011-12-31 | 2014-05-14 | 四川虹欧显示器件有限公司 | Plasma display equipment display method and device |
| CN102760400B (en) * | 2012-07-04 | 2015-01-07 | 四川虹欧显示器件有限公司 | Method for preventing sustaining pulse from overflowing |
| CN106097967A (en) * | 2016-08-25 | 2016-11-09 | 深圳市华星光电技术有限公司 | A kind of OLED PWM driving method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030090441A1 (en) * | 2001-11-14 | 2003-05-15 | Samsung Sdi Co., Ltd. | Method and apparatus for driving plasma display panel operating with middle discharge mode in reset period |
| CN1538371A (en) * | 2003-04-17 | 2004-10-20 | Lg电子有限公司 | Driving method and device for plasma display panel |
| CN1664893A (en) * | 2003-10-16 | 2005-09-07 | 三星Sdi株式会社 | Plasma display panel and driving method therefor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030090441A1 (en) * | 2001-11-14 | 2003-05-15 | Samsung Sdi Co., Ltd. | Method and apparatus for driving plasma display panel operating with middle discharge mode in reset period |
| CN1538371A (en) * | 2003-04-17 | 2004-10-20 | Lg电子有限公司 | Driving method and device for plasma display panel |
| CN1664893A (en) * | 2003-10-16 | 2005-09-07 | 三星Sdi株式会社 | Plasma display panel and driving method therefor |
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Owner name: SICHUAN SHIJI SHUANGHONG DISPLAY DEVICES CO., LTD Free format text: FORMER OWNER: IRICO GROUP ELECTRONICS CO., LTD. Effective date: 20070720 |
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Effective date of registration: 20070720 Address after: 621000, No. 35 Mian Xing Dong Road, hi tech Zone, Sichuan, Mianyang Applicant after: Sichuan Sterope Orion Display Co., Ltd. Address before: 712021 No. 1 Rainbow Road, Shaanxi, Xianyang Applicant before: IRICO Group Electronics Co., Ltd. |
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