CN102568371A - Method for driving plasma display device - Google Patents
Method for driving plasma display device Download PDFInfo
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- CN102568371A CN102568371A CN2012100175083A CN201210017508A CN102568371A CN 102568371 A CN102568371 A CN 102568371A CN 2012100175083 A CN2012100175083 A CN 2012100175083A CN 201210017508 A CN201210017508 A CN 201210017508A CN 102568371 A CN102568371 A CN 102568371A
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Abstract
The embodiment of the invention discloses a method for driving a plasma display device. The method comprises the step of setting that a duty factor of a control pulse signal is decreased with the increase of temperature and increased with the decrease of temperature on the premise that the period of the control pulse signal for generating a Y slope is not changed during a reset period. When the plasma display device is driven to work by adopting the set control pulse signal, a slope with a smaller duty factor can be generated at higher temperature, and a slope with a larger duty factor can be generated at lower temperature, so that wave forms of the slopes at different temperatures trend to be same; and finally, the display quality of an image can be increased.
Description
Technical field
The present invention relates to the plasma scope technical field, more particularly, relate to a kind of driving method of plasm display device.
Background technology
Plasm display device (Plasma Display Panel; PDP) be the display device of new generation of high speed development in recent years; Its principle of work is at the inner filling with inert gas of two glass electrodes, is coated with three primary colors fluorescent powder on one of them glass electrode, through between two glass electrodes, adding high voltage; Cause noble gas discharge and produce plasma, the ultraviolet ray excited light-emitting phosphor and then the display frame of said plasma generation.Said plasm display device receives widely and paying close attention to because of it has advantages such as high brightness, high-contrast, wide visual angle, color be true to nature.
The driving sequence of plasm display device is divided into reset cycle, scan period and hold period.Wherein, the said reset cycle is through discharging to all unit (cell) and eliminating the wall electric charge simultaneously and eliminate the demonstration hysteresis; Scan period is selected discharge cell from the matrix structure of the combination results of column electrode and row electrode, so that form addressing discharge (address discharge); In discharge cell recharge/discharge of using energy rejuvenation to form in to the scan period, hold period is with regard to display image.
Carry out in the driving process in article on plasma body display device, the ramp waveform that is wherein applied in the reset cycle has very big influence to the display quality of image.The ramp waveform that is applied in the reset cycle of plasm display device driving circuit has three kinds of forms, that is: X ramp waveform, Y acclivity waveform and Y decline ramp waveform.And Y acclivity waveform and Y decline ramp waveform are relatively more responsive to temperature, and it will produce along with variation of temperature than great fluctuation process, and then influences the discharge of inert gas between the glass electrode, finally influences the display quality of image.
Summary of the invention
In view of this, the present invention provides a kind of driving method of plasm display device, with Y acclivity waveform and Y decline ramp waveform in the solution prior art temperature is compared sensitive issue, improves the display quality of image.
For realizing above-mentioned purpose, the present invention provides following technical scheme:
A kind of driving method of plasm display device, this method comprises:
In the reset cycle, be used to produce under the constant prerequisite of cycle of control wave on Y slope, the dutycycle that said control wave is set reduces along with the rising of temperature, increases along with the reduction of temperature.
Preferably, in the said method, the said control wave that is used to produce the Y slope comprises:
Be used to produce the Y rising control wave of Y acclivity and be used to produce the Y decline control wave on Y decline slope.
Preferably, in the said method, the cycle of said Y rising control wave is 3500ns, and the cycle of said Y decline control wave is 3300ns.
Preferably, in the said method, the dutycycle that Y rising control wave is set reduces along with the rising of temperature, increases along with the reduction of temperature, specifically comprises:
Temperature is divided into a plurality of stages; The dutycycle that Y rising control wave in each stage is set is identical; The dutycycle of Y rising control wave is different in the different phase, and the dutycycle of corresponding higher temperature Y rising control wave in the stage is less than the dutycycle of corresponding lower temperature Y rising control wave in the stage.
Preferably, in the said method, the dutycycle that Y decline control wave is set reduces along with the rising of temperature, increases along with the reduction of temperature, specifically comprises:
Temperature is divided into a plurality of stages; The dutycycle that Y decline control wave in each stage is set is identical; The dutycycle of Y decline control wave is different in the different phase, and the dutycycle of corresponding higher temperature Y decline control wave in the stage is less than the dutycycle of corresponding lower temperature Y decline control wave in the stage.
Preferably, in the said method, a plurality of temperature stages comprise: below 0 ℃, 0～10 ℃, 10～20 ℃, 20～30 ℃, 30～40 ℃, more than 40～50 ℃ and 50 ℃; And when temperature was in 0～10 ℃ of stage, the dutycycle that Y rising control wave is set was 35/70, and when temperature during greater than 50 ℃, the dutycycle that Y rising control wave is set is 30/70.
Preferably, in the said method, a plurality of temperature stages comprise: below 0 ℃, 0～10 ℃, 10～20 ℃, 20～30 ℃, 30～40 ℃, more than 40～50 ℃ and 50 ℃; And when temperature was in 0～10 ℃ of stage, the dutycycle that Y decline control wave is set was 48/66, and when temperature was in 40～50 ℃ of stages, the dutycycle that Y decline control wave is set was 44/66.
Can find out from technique scheme; The driving method of plasm display device provided by the present invention; In the reset cycle, be used to produce under the constant prerequisite of cycle of control wave on Y slope, the dutycycle that said control wave is set reduces along with the rising of temperature, increases along with the reduction of temperature; Therefore can alleviate the Y ramp waveform changes when temperature is higher comparatively fast; When temperature is low, change slower problem, and then can reduce the Y ramp waveform and be acted upon by temperature changes, finally can improve the display quality of image.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the driving method schematic flow sheet of a kind of plasm display device that the embodiment of the invention provided.
Embodiment
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
Said as the background technology part; The ramp waveform that is applied in reset cycle has very big influence to the display quality of image; And Y acclivity waveform in the said ramp waveform and Y decline ramp waveform (general designation Y ramp waveform) are relatively more responsive to temperature; That is: the Y ramp waveform can produce along with variation of temperature than great fluctuation process, and the fluctuation of said Y ramp waveform will influence the discharge of inert gas between the glass electrode, and then influences the display quality of image.
The inventor discovers that Y ramp waveform its slope (or gradient) when temperature is high more changes fast more, when temperature is low more; Its slope variation is slow more; In order to make the Y ramp waveform can under any temperature, be unlikely to change too fast or to change too slowly, therefore, recently control the Y ramp waveform through the duty that the control wave that influences the Y ramp waveform is set; Be that the dutycycle of said control wave is reduced along with the rising of temperature; Increase along with the reduction of temperature, thereby make the Y ramp waveform under different temperatures, reach unanimity as far as possible (promptly keeping having identical slope), and then improve the display quality of image.
Describe scheme provided by the present invention below in detail, with reference to figure 1, Fig. 1 is the driving method schematic flow sheet of a kind of plasm display device provided by the present invention, and this method specifically comprises:
Step S1: temperature is divided into a plurality of stages in regular turn.
Temperature described in the embodiment of the invention refers to limited temperature range, and this limited temperature range refers to the temperature range that plasm display device can be worked.Even but in said limited temperature range; Be used for providing the driving circuit of driving also can to change with the difference of temperature to plasm display device; Concrete manifestation is come out: the slope of the Y ramp waveform that is produced can have along with variation of temperature than big-difference; And then produce discharge failure when making under the different temperatures noble gas discharge, influence the display quality of image.
In order to address the above problem, the present invention at first is divided into a plurality of stages with temperature according to order.Be specially in the present embodiment: temperature is divided into following several stages in order: below 0 ℃, 0～10 ℃, 10～20 ℃, 20～30 ℃, 30～40 ℃, more than 40～50 ℃ and 50 ℃.Need to prove that 0 ℃, 10 ℃, 20 ℃, 30 ℃, 40 ℃ and 50 ℃ are critical temperature, for the Y acclivity here; Said critical temperature belongs to the last temperature stage, and for Y decline slope, said critical temperature belongs to the one temperature stage of back; Particularly, be that example describes with 10 ℃, for the Y acclivity; 10 ℃ belong to 0～10 ℃ of temperature stage, and for Y decline slope, 10 ℃ belong to 10～20 ℃ of temperature stages.
Step S2: the dutycycle that control wave is set is identical in the stage in same temperature, and is lower than in the dutycycle of lower temperature in the stage in the dutycycle of higher temperature in the stage.
Because the Y slope comprises Y acclivity and Y decline slope, therefore, said control wave comprises and is used to produce the Y rising control wave of Y acclivity and is used to produce the Y decline control wave on Y decline slope.
The cycle of the rising of Y described in embodiment of the invention control wave is 3500ns; The cycle of said Y decline control wave is 3300ns; Certainly, cycle 3500ns described herein and 3300ns are an object lesson, should can be different from this by cycle numerical value among other embodiment; But, should guarantee in the adjustment control wave dutycycle that in same embodiment its corresponding cycle is constant.
To Y rising control wave; It is identical in the dutycycle of same temperature in the stage that it is set; Different in the dutycycle of different temperatures in the stage, and the dutycycle of corresponding higher temperature Y rising control wave in the stage is less than the dutycycle of corresponding lower temperature Y rising control wave in the stage.But the concrete data reference table one of the dutycycle of set Y rising control wave in the present embodiment.
Table one
Opening time (ON Time), shut-in time (OFF Time) and the dutycycle of Y rising control wave (corresponding Ramp up) in the one-period of different temperatures in the stage has been shown in the table one; Can know by table one; When temperature was between 0～10 ℃, the dutycycle that Y rising control wave is set was 35/70; When temperature below 0 ℃ the time, the dutycycle that Y rising control wave is set is 36/70; And the dutycycle that Y rising control wave is set is along with the variation in temperature stage forms linear change, that is: linear the reducing along with the rising in temperature stage.
To Y decline control wave; It is identical in the dutycycle of same temperature in the stage that it is set; Different in the dutycycle of different temperatures in the stage, and the dutycycle of corresponding higher temperature Y decline control wave in the stage is less than the dutycycle of corresponding lower temperature Y decline control wave in the stage.But the concrete data reference table two of the dutycycle of set Y decline control wave in the present embodiment.
Table two
Opening time (ON Time), shut-in time (OFF Time) and the dutycycle of Y decline control wave (corresponding Ramp down) in the one-period of different temperatures in the stage has been shown in the table two; Can know by table two; When temperature was between 0～10 ℃, the dutycycle that Y decline control wave is set was 48/66; When temperature below 0 ℃ the time, the dutycycle that Y decline control wave is set is 49/66; And the dutycycle that Y decline control wave is set is along with the variation in temperature stage forms linear change, that is: linear the reducing along with the rising in temperature stage.
Step S3: make the control wave that sets produce the Y ramp waveform, to drive plasm display device work.
Above-mentioned steps is provided with the dutycycle of control wave; And no matter be Y rising control wave or Y decline control wave; Its dutycycle all is set reduces along with the rising in temperature stage, therefore, in hot stage; Because dutycycle reduced relatively, so understand relatively slow by the Y acclivity that corresponding control wave produced and the slope variation on Y decline slope; In low thermophase; Because dutycycle has increased relatively; So the slope variation by Y acclivity that corresponding control wave produced and Y decline slope can be very fast relatively, therefore, when adopting the control wave that sets to produce the Y ramp waveform to work to drive plasm display device; Can alleviate Y ramp waveform temperature influence in the prior art and produce the situation of discharge failure, thereby can improve the display quality of image.
To sum up can know; The embodiment of the invention is under constant prerequisite of the cycle of control wave; The dutycycle that control wave is set reduces along with the rising of temperature, therefore under higher temperature, produces the less slope of dutycycle, produces the bigger slope of dutycycle at a lower temperature; Thereby make the ramp waveform convergence under the different temperatures consistent, finally improve the display quality of image.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be conspicuous concerning those skilled in the art, and defined General Principle can realize under the situation that does not break away from the spirit or scope of the present invention in other embodiments among this paper.Therefore, the present invention will can not be restricted to these embodiment shown in this paper, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.
Claims (7)
1. the driving method of a plasm display device is characterized in that, comprising:
In the reset cycle, be used to produce under the constant prerequisite of cycle of control wave on Y slope, the dutycycle that said control wave is set reduces along with the rising of temperature, increases along with the reduction of temperature.
2. method according to claim 1 is characterized in that, the said control wave that is used to produce the Y slope comprises:
Be used to produce the Y rising control wave of Y acclivity and be used to produce the Y decline control wave on Y decline slope.
3. method according to claim 2 is characterized in that, the cycle of said Y rising control wave is 3500ns, and the cycle of said Y decline control wave is 3300ns.
4. method according to claim 3 is characterized in that, the dutycycle that Y rising control wave is set reduces along with the rising of temperature, increases along with the reduction of temperature, specifically comprises:
Temperature is divided into a plurality of stages; The dutycycle that Y rising control wave in each stage is set is identical; The dutycycle of Y rising control wave is different in the different phase, and the dutycycle of corresponding higher temperature Y rising control wave in the stage is less than the dutycycle of corresponding lower temperature Y rising control wave in the stage.
5. method according to claim 3 is characterized in that, the dutycycle that Y decline control wave is set reduces along with the rising of temperature, increases along with the reduction of temperature, specifically comprises:
Temperature is divided into a plurality of stages; The dutycycle that Y decline control wave in each stage is set is identical; The dutycycle of Y decline control wave is different in the different phase, and the dutycycle of corresponding higher temperature Y decline control wave in the stage is less than the dutycycle of corresponding lower temperature Y decline control wave in the stage.
6. method according to claim 4 is characterized in that, a plurality of temperature stages comprise: below 0 ℃, 0～10 ℃, 10～20 ℃, 20～30 ℃, 30～40 ℃, more than 40～50 ℃ and 50 ℃; And when temperature was in 0～10 ℃ of stage, the dutycycle that Y rising control wave is set was 35/70, and when temperature during greater than 50 ℃, the dutycycle that Y rising control wave is set is 30/70.
7. method according to claim 5 is characterized in that, a plurality of temperature stages comprise: below 0 ℃, 0～10 ℃, 10～20 ℃, 20～30 ℃, 30～40 ℃, more than 40～50 ℃ and 50 ℃; And when temperature was in 0～10 ℃ of stage, the dutycycle that Y decline control wave is set was 48/66, and when temperature was in 40～50 ℃ of stages, the dutycycle that Y decline control wave is set was 44/66.
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| CN1495691A (en) * | 2002-09-12 | 2004-05-12 | Lg������ʽ���� | Method and equipment for driving plasma display panel |
| CN1744169A (en) * | 2004-09-03 | 2006-03-08 | 南京Lg同创彩色显示系统有限责任公司 | Method for driving plasma display device |
| CN1855195A (en) * | 2005-04-19 | 2006-11-01 | 三星Sdi株式会社 | Method of driving plasma display panel (PDP) |
| KR20070054835A (en) * | 2005-11-24 | 2007-05-30 | 삼성에스디아이 주식회사 | Plasma display device and driving method thereof |
| CN101447164A (en) * | 2007-10-10 | 2009-06-03 | 乐金电子（南京）等离子有限公司 | Plasma display apparatus |
| US20090174627A1 (en) * | 2008-01-09 | 2009-07-09 | Samsung Sdi Co., Ltd. | Plasma display and driving device and method thereof |
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- 2012-01-19 CN CN2012100175083A patent/CN102568371A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1495691A (en) * | 2002-09-12 | 2004-05-12 | Lg������ʽ���� | Method and equipment for driving plasma display panel |
| CN1744169A (en) * | 2004-09-03 | 2006-03-08 | 南京Lg同创彩色显示系统有限责任公司 | Method for driving plasma display device |
| CN1855195A (en) * | 2005-04-19 | 2006-11-01 | 三星Sdi株式会社 | Method of driving plasma display panel (PDP) |
| KR20070054835A (en) * | 2005-11-24 | 2007-05-30 | 삼성에스디아이 주식회사 | Plasma display device and driving method thereof |
| CN101447164A (en) * | 2007-10-10 | 2009-06-03 | 乐金电子（南京）等离子有限公司 | Plasma display apparatus |
| US20090174627A1 (en) * | 2008-01-09 | 2009-07-09 | Samsung Sdi Co., Ltd. | Plasma display and driving device and method thereof |
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