CN100452150C - Plasma display device and its driving method - Google Patents
Plasma display device and its driving method Download PDFInfo
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- CN100452150C CN100452150C CNB2006101533511A CN200610153351A CN100452150C CN 100452150 C CN100452150 C CN 100452150C CN B2006101533511 A CNB2006101533511 A CN B2006101533511A CN 200610153351 A CN200610153351 A CN 200610153351A CN 100452150 C CN100452150 C CN 100452150C
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/28—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels
- G09G3/288—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels
- G09G3/291—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels controlling the gas discharge to control a cell condition, e.g. by means of specific pulse shapes
- G09G3/294—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels controlling the gas discharge to control a cell condition, e.g. by means of specific pulse shapes for lighting or sustain discharge
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/28—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels
- G09G3/288—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels
- G09G3/296—Driving circuits for producing the waveforms applied to the driving electrodes
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Abstract
The present invention discloses a plasma display device comprising a plasma display panel having scanning electrode and maintaining electrode; a scanning drive part for applying degressive oblique wave form which is initiated by negative polarity voltage level to the scanning electrode during the falling edge of the restoring period of the sub-field, and applying alternately positive polarity maintaining pulse and negative polarity maintaining pulse to the scanning electrode during the maintaining period of the sub-field; and a maintaining drive part for applying reverse polarity maintaining pulse to the maintaining electrode, corresponding the maintaining pulse applied to the scanning electrode, during the maintaining period of the sub-field. The present invention is capable of reducing the driving time of the plasma display device and reducing the load of the circuit.
Description
One, technical field
The invention relates to plasma display system, more specifically say, is a kind of plasma display system and driving method thereof that has improved drive waveforms.
Two, background technology
General Plasmia indicating panel, form a unit cell (cell) by the interlayer that forms between its front panel and back faceplate panels, filled neon (Ne) in each cell (cell), helium (He), or the mixed gas of neon and helium main discharge gases such as (Ne+He) and the inert gas that contains xenon on a small quantity.Above-mentioned unit discharge cell (cell), a plurality of combining forms a pixel (Pixel).It is for example, red that (green (blue (Blue, B) cell (cell) is combined and is formed a pixel (pixel) for Green, G) cell (cell) for Red, R) cell (cell).This unit discharge cell (cell), when the HF voltage guiding discharge, inert gas produces vacuum ultraviolet (Vacuum Ultraviolet ray), makes the light-emitting phosphor that forms between interlayer, display frame.Aforesaid Plasmia indicating panel has frivolous structure, attracts tremendous attention as display device of new generation.
Fig. 1 is in the prior art, an example schematic of Plasmia indicating panel structure.
As shown in Figure 1, in the example of prior art ionic medium display panel, arrange a plurality of front panels 100 of keeping electrode that scan electrode (Y) 102 forms with keeping 103 pairs at electrode (Z) in the display surface-front substrate 101 by display frame; And rearrange on the back substrate 111 at the back side and keep at a certain distance away, be combined into abreast with above-mentioned a plurality of back faceplate panels 110 of keeping a plurality of addressing electrodes (X) 113 of arranging on electrode crossing ground.
Arrange a plurality of discharge spaces on the back faceplate panels 110, that is, arrange bar (stripe) type (or well (well) type) interlayer 112 that forms discharge cell (cell), and keep balance.Again, position discharge, produce vacuum ultraviolet a plurality of addressing electrode (X) 113 and arrange abreast with interlayer 112.The top spraying of back faceplate panels 110, for the R of visible light is radiated in display frame during orientation discharge, G, B fluorophor 114.114 lower dielectric layer 115 that form protection addressing electrode (X) 113 of addressing electrode (X) 113 and fluorophor.
Front panel 200 with said structure is combined together to form Plasmia indicating panel with back faceplate panels 210 by sealing (sealing) operation.Again, adhere to a plurality of electrodes of driving on this Plasmia indicating panel, for example: scan electrode (Y) 102, keep the drive division of electrodes such as electrode (Z) 103 and addressing electrode (X) 113 etc., form plasma display system.
Wherein, above-mentioned drive division provides certain driving voltage to above-mentioned a plurality of electrodes, produces discharge and display frame, and the drive waveform examples of above-mentioned drive division as shown in Figure 2.
Fig. 2 is in the prior art, the drive waveforms synoptic diagram of the driving method of plasma display system.
As shown in Figure 2, in the prior art, the oscillogram of Plasmia indicating panel driving method by reset (reset) during, during the location (address) and keep during (sustain) and form, reseting period by rising edge during and form during the negative edge.
During the rising edge, (Y) electrode is negative to add high voltage rising ramp waveform (Rmap_up) to scanning, and keeps in (Z) electrode and numeral (X) electrode and will gather positive polarity wall electric charge, will gather negative polarity wall electric charge in scanning (Y) electrode.
During the negative edge, the negative decline ramp waveform (Ramp_down) that adds, the wall electric charge owing to high voltage rising oblique wave (Rmap_up) pulse causes transition to be piled up is reduced to a certain amount of equably.
During the location (address), the scanning impulse of scanning (Y) electrode causes orientation discharge with the digit pulse of numeral (X) electrode, keeps the positive polarity voltage that keeps keeping voltage (Vs) in (Z) electrode.At this moment, negative be added in the bias voltage of keeping on (Z) electrode (Vs) and should keep certain voltage, make it can not produce discharge with the negative scanning impulse that adds on scanning (Y) electrode.
Keep the interval,, produce and keep discharge, display frame scanning (Y) electrode and keeping alternately to bear to add on (Z) electrode and keep pulse.
Above-mentioned drive waveforms will cause driving voltage too high.That is, for example: high voltage rising oblique wave (Rmap_up) pulse voltage during the rising edge and keep during keep high voltages such as pulse (Vs) voltage and will cause many bad influences.That is, increase the loop burden, lead to damage, use the good element of high voltage withstanding characteristic, cause manufacturing expense to increase.
Especially, this high-tension driving has increased the bad influence to the drive division with fragile thermal characteristics, increases the weight of the loop damage, and shortens the life-span of Plasmia indicating panel.
On the one hand, reseting period, remove the wall electric charge that forms in the discharge process of front, in during next program-location (address), carry out correct positioning and accumulate the wall electric charge, add (Rmap_up) pulse of high voltage rising oblique wave and decline oblique wave (ramp down) pulse and bear.At this moment, the negative pulse that adds of reseting period is in order to suppress the generation of light, improves contrast-response characteristic and produces weak discharge (weak discharge).In order to produce above-mentioned weak discharge (weak discharge), add oblique wave (ramp) pulse with certain degree of tilt and bear.
As mentioned above, bear and add oblique wave (ramp) pulse with certain degree of tilt, therefore, the length of reseting period will extend, this will shorten the length during the keeping of display frame, and this will cause the reduction of image quality, and the time degree of freedom that drives also will reduce, reduce actuating speed, the high-speed driving characteristic that possesses for the high resolution displayed picture also will reduce.
Three, summary of the invention
In view of this, in order to address the above problem, the object of the present invention is to provide a kind of plasma display system and driving method thereof that can reduce the loop burden.
Again, another object of the present invention is to provide a kind of and can drives under low-voltage, prevents the loop damage, reduces the plasma display system and the driving method thereof of manufacturing expense.
Again, another object of the present invention is to provide a kind of plasma display system and driving method thereof that can shorten driving time.
Again, another object of the present invention is to provide a kind of plasma display system and driving method thereof of high image quality.
Technical problem among the present invention is not limited to foregoing, the other technologies problem that will reach among the present invention, and any those skilled in the art can be known by following summary of the invention and effect.
Invent for addressing the above problem, the plasma display system among the present invention comprises: have a scan electrode and keep the Plasmia indicating panel of electrode; During the negative edge of subdomain (sub-field) reseting period, the decline ramp waveform that begins to the negative in addition reverse voltage rank of above-mentioned scan electrode, during the keeping of subdomain (sub-field), keep the scanning driving part that pulse and negative polarity are kept pulse to the alternately negative positive polarity that adds of above-mentioned scan electrode; And with the keeping of subdomain (sub-field) during, with above-mentioned scan electrode negative add keep pulse accordingly, keep to above-mentioned that electrode is negative to add the drive division of keeping that reversed polarity is kept pulse.
Invent for addressing the above problem, the plasma display system among the present invention comprises: have a scan electrode and keep the Plasmia indicating panel of electrode; During the negative edge of subdomain (sub-field) reseting period, the decline ramp waveform that voltage level from pulse to the negative in addition negative polarity of above-mentioned scan electrode that keep begins, during the keeping of subdomain (sub-field), keep the scanning driving part that pulse and negative polarity are kept pulse to the alternately negative positive polarity that adds of above-mentioned scan electrode; And with the keeping of subdomain (sub-field) during, with above-mentioned scan electrode negative add keep pulse accordingly, keep to above-mentioned that electrode is negative to add the drive division of keeping that reversed polarity is kept pulse.
Again, the above-mentioned drive division of keeping should be during the rising edge of above-mentioned subdomain (sub-field) reseting period, and the above-mentioned voltage level of keeping electrode rose before the reverse voltage rank begins above-mentioned decline ramp waveform.
Again, the above-mentioned drive division of keeping should be during the rising edge of above-mentioned subdomain (sub-field) reseting period, and the voltage level that the above-mentioned voltage level of keeping electrode is kept pulse from negative polarity begins to rise to ground voltage (GND) before the above-mentioned decline ramp waveform.
Again, above-mentioned scanning driving part or above-mentioned keeping in the drive division, above-mentioned positive polarity is kept pulse and above-mentioned negative polarity and is kept the magnitude of voltage of pulse and be about during above-mentioned the keeping, and keeps half of the required voltage of discharge.
Again, whether above-mentioned scanning driving part during the rising edge of subdomain (sub-field) reseting period, to the negative rising edge pulse that adds of above-mentioned scan electrode, is kept discharge during should keeping according to previous subdomain (sub-field), and is adjusted.
Again, above-mentioned scanning driving part during the rising edge of above-mentioned subdomain (sub-field) reseting period, keeps during above-mentioned previous subdomain (sub-field) is kept that the negative rising edge pulse that adds should be a square wave in the cell (cell) of discharge.
Again, above-mentioned scanning driving part, the maximum voltage value that makes above-mentioned square wave is identical with the maximum voltage value that above-mentioned positive polarity is kept pulse.
Again, above-mentioned scanning driving part makes the voltage level of the point that above-mentioned decline ramp waveform finishes, and is added on the above-mentioned scan electrode voltage level height of negative polarity scanning impulse than negative during the location (address).
Invent for addressing the above problem, in the driving method of the plasma display system among the present invention, during the negative edge of subdomain (sub-field) reseting period, the decline ramp waveform that begins to the negative in addition reverse voltage rank of above-mentioned scan electrode; During the keeping of subdomain (sub-field), add that positive polarity is kept pulse and negative polarity is kept pulse to above-mentioned scan electrode is alternately negative; During the keeping of subdomain (sub-field), with above-mentioned scan electrode negative add keep pulse accordingly, keep to above-mentioned that electrode is negative to be added reversed polarity and keep pulse.
Invent for addressing the above problem, in the driving method of the plasma display system among the present invention, during the negative edge of subdomain (sub-field) reseting period, the decline ramp waveform that voltage level from pulse to the negative in addition negative polarity of above-mentioned scan electrode that keep begins; During the keeping of subdomain (sub-field), add that positive polarity is kept pulse and negative polarity is kept pulse to above-mentioned scan electrode is alternately negative; During the keeping of subdomain (sub-field), with above-mentioned scan electrode negative add keep pulse accordingly, keep to above-mentioned that electrode is negative to be added reversed polarity and keep pulse.
Again, during the rising edge of above-mentioned subdomain (sub-field) reseting period, the above-mentioned voltage level of keeping electrode rose before the reverse voltage rank begins above-mentioned decline ramp waveform.
Again, during the rising edge of above-mentioned subdomain (sub-field) reseting period, the voltage level that the above-mentioned voltage level of keeping electrode is kept pulse from negative polarity begins to rise to ground voltage (GND) before the above-mentioned decline ramp waveform.
Again, above-mentioned positive polarity is kept pulse and above-mentioned negative polarity and is kept the magnitude of voltage of pulse and be about during above-mentioned the keeping, and keeps half of the required voltage of discharge.
During the rising edge of subdomain (sub-field) reseting period,, whether keep discharge during should keeping according to previous subdomain (sub-field), and adjust to the negative rising edge pulse that adds of above-mentioned scan electrode again.
During the rising edge of above-mentioned subdomain (sub-field) reseting period, during keeping, keeps above-mentioned previous subdomain (sub-field) that the negative rising edge pulse that adds should be a square wave in the cell (cell) of discharge again.
Again, the maximum voltage value of above-mentioned square wave and the above-mentioned positive polarity maximum voltage value of keeping pulse is identical.
Again, the voltage level of the point that above-mentioned decline ramp waveform finishes is added on the above-mentioned scan electrode voltage level height of negative polarity scanning impulse than negative during the location (address).
Beneficial effect of the present invention is as follows:
Plasma display system among the present invention and driving method thereof can drive under low-voltage, and the protection loop reduces manufacturing expense.Plasma display system among the present invention and driving method thereof can reduce the electric weight of consumption.Plasma display system among the present invention and driving method thereof can shorten driving time.Plasma display system among the present invention and driving method thereof can improve image quality.
Four, description of drawings
Fig. 1 is in the prior art, an example schematic of Plasmia indicating panel structure.
Fig. 2 is in the prior art, the drive waveforms synoptic diagram of the driving method of plasma display system.
Fig. 3 is among the present invention, an example schematic of plasma display system.
Fig. 4 is among the present invention, an example schematic of the driving method of plasma display system.
Fig. 5 is among the present invention, the drive waveforms synoptic diagram of the driving method of plasma display system.
Fig. 6 is among the present invention, the wall state of charge synoptic diagram of the driving method of plasma display system.
Fig. 7 a to Fig. 7 b is among the present invention, and the drive waveforms of plasma display system is according to the synoptic diagram of different discharge cell (cell) adjustment.
The symbol description of major part during accompanying drawing shows
300: Plasmia indicating panel 321: control part
322: addressing drive division 323: scanning driving part
324: keep drive division 325: the driving voltage generating unit
Five, embodiment
Below, lift preferred embodiment, and conjunction with figs. is described in detail as follows to plasma display system among the present invention and driving method thereof.
Fig. 3 is among the present invention, an example schematic of plasma display system.
As shown in Figure 3, the plasma display system among the present invention comprises: Plasmia indicating panel 300; Lower basal plate (not shown) to Plasmia indicating panel 300 goes up the addressing drive division 322 that the addressing electrode (X1 to Xm) that forms provides data; The scanning driving part 323 of driven sweep electrode (Y1 to Yn); What drive common electrode-keep electrode (Z) keeps drive division 324; When driving Plasmia indicating panel, control addressing drive division 322, scanning driving part 323 is kept the control part 321 of drive division 324; The driving voltage generating unit 325 of the required driving voltage of each drive division 322,323,324 is provided.
Before the above-mentioned plasma display system of explanation, its driving method is described as shown in Figure 4.
Fig. 4 is among the present invention, an example schematic of the driving method of plasma display system.
As shown in Figure 4, for display frame on Plasmia indicating panel, the plasma display system among the present invention can be divided into a frame (frame) a plurality of subdomains (sub-field), drives.That is, each subdomain (sub-field) is divided into: the reseting period of all cells of initialization (cell); Select during the location (address) of discharge cell (cell); And during showing keeping of GTG according to discharge time, drive.
In the driving method that as above drives, with reference to shown in Figure 3, plasma display system among the present invention, scanning driving part 323 is under the control of control part 321, provide to scan electrode (Y1 to Yn) at reseting period, the reset pulse of the wall state of charge of all discharge cells (cell) in the initialization in the subdomain (sub-field), for example, rising ramp waveform (Ramp_up) and decline ramp waveform (Ramp_down).At this moment, different with prior art, scanning driving part makes above-mentioned decline ramp waveform from the reverse voltage rank among the present invention.Especially, can make it keep the voltage level of pulse from negative polarity, to this detailed structure Fig. 5 and below figure in describe in detail.
Again, scanning driving part 323 for the discharge cell of opening during selecting to keep (cell), is kept scan bias voltage (Vsc) during location (address) under the control of control part 321, and (Y1 to Yn) provides successively to scan electrode, as: scanning voltage (scanning impulse Vy).
Again, scanning driving part 323 alternately negatively during keeping adds that positive polarity is kept pulse and negative polarity is kept pulse under the control of control part 321, make its with following keep that drive division provides to keep pulse polarity opposite, discharge is kept in generation.
By contrary gamma compensated not shown in the addressing drive division 322 (reverse gamma compensation) loop, error diffusion (Error Diffusion) loop etc., after contrary gamma compensated (reverse gamma compensation) and error diffusion (Error Diffusion), by subdomain (sub-field) mapping loop (MappingCircuit), provide mapping (Mapping) data to each subdomain (sub-field).Above-mentioned addressing drive division 322, the timing control signal (CTRX) of response control part 321 after sampling (sampling) and locking (latch) data, offers addressing electrode (X1 to Xm) with above-mentioned data.At this moment, the discharge cell (cell) of opening (On) according to above-mentioned data promptly produces indication and discharges-keep the cell (cell) of discharge with selected during keeping.
For example, open in the discharge cell (cell) of (On), during location (address), addressing drive division 322 provides to addressing electrode (X1 to Xm), the synchronous digit pulse of scanning impulse that provides successively to scan electrode (Y1 to Yn) with above-mentioned scanning driving part 323.As mentioned above, provide in the discharge cell (cell) of digit pulse, kept pulse, then formed and to produce the wall electric charge of keeping discharge if during keeping, bear to add.
Keep drive division 324 under the control of control part 321, during the rising edge of reseting period, make the voltage level of keeping electrode (Z), before during the beginning negative edge, that is, before the decline ramp waveform of beginning scan electrode, from reverse voltage rank its voltage level that rises.For example, during the rising edge of subdomain (sub-field) reseting period, keep the voltage level of electrode (Z), before during negative edge, beginning, that is, before the decline ramp waveform of beginning scan electrode, the voltage level of keeping pulse from negative polarity rises to ground voltage (GND).
Keep drive division 324 and during location (address), provide the bias voltage of positive polarity voltage to keeping electrode (Z) again.Again, keep drive division 324 as mentioned above, during keeping, the keeping of its inside drives that loop and scanning driving part 323 possess keeps driving loop alternation, provides and keeps pulse (sus) to keeping electrode (Z).
At this moment, scanning driving part 323 is alternately negative when adding positive polarity and keeping pulse and keep pulse with negative polarity, correspondingly, bears the pulse that adds opposite polarity, makes it keep discharge.For example, required voltage is 200V in the discharge if indication is discharged-kept, then scanning driving part 323 to scan electrode (Y) is negative adds+when the positive polarity of 100V is kept pulse, keep 324 of drive divisions electrode (Z) is negative to be added to keeping-negative polarity of 100V keeps pulse, make the potential difference (PD) of two electrodes keep 200V, make it keep discharge.
Again, with it alternately, scanning driving part 323 to scan electrode (Y) is negative adds-when the negative polarity of 100V is kept pulse, keep 324 of drive divisions electrode (Z) is negative to be added to keeping+positive polarity of 100V keeps pulse, make the potential difference (PD) of two electrodes keep 200V, make it keep discharge.Aforesaid driving method can reduce driving voltage, and this detailed impression is described in the back.
On the one hand, data controlling signal (CTRX) comprises: sampling (sampling) clock of sampling (sampling) data, and locking (latch) control signal, the switch controlling signal of the ON/OFF sequential that drives loop and on-off element is kept in control.Scan control signal (CTRY) comprises: the switch controlling signal of keeping the ON/OFF sequential that drives loop and driving switch element in the gated sweep drive division 323.Keeping control signal (CTRZ) comprises: the switch controlling signal of keeping the ON/OFF sequential that drives loop and driving switch element in the drive division 324 is kept in control.
Driving voltage generating unit 325 produces rising edge voltage (Vsetup), scanning common voltage (Vscan-com), and (Vy), keep voltage (Vs), number occupies voltage (Vd) etc. to scanning voltage.Above-mentioned driving voltage may be along with the structure of the composition of discharge gas or discharge cell (cell) and is changed.
Aforesaid, the structure of ionic medium display device of the present invention, only be for the ease of understanding for embodiment, be not in order to limit the present invention.That is,,, then all belong to category of the present invention as long as feature-patent claim of the present invention is identical with structure even the structure of drive unit changes to some extent.
Aforesaid, the drive waveforms of ionic medium display device of the present invention as shown in Figure 5.
Fig. 5 is among the present invention, the drive waveforms synoptic diagram of the driving method of plasma display system.
As shown in Figure 5, plasma display system is divided into a plurality of subdomains (sub-field) with the frame (frame) of picture, more above-mentioned subdomain (sub-field) is divided into: the reseting period of all cells of initialization (cell); Select during the location (address) of discharge cell (cell); And keep during the keeping of discharge of selected cell (cell), drive.As required, can increase during the removing of removing the wall electric charge in the discharge cell (cell) again.
For reseting period, the while is to the negative rising ramp waveform (Ramp_up) that adds of all scan electrodes (Y) during the rising edge.Owing in the above-mentioned rising ramp waveform, the discharge cell of whole image (cell) more weak dark discharge (Dark Discharge) will take place.Because the discharge of above-mentioned rising edge, addressing electrode will gather positive polarity wall electric charge with keeping on the electrode, will gather negative polarity wall electric charge on the scan electrode.
Wherein, in the driving method for plasma display apparatus of the present invention, more specifically say, when during rising edge, beginning, in all scan electrodes (Y), (what Vs/2) vertically rise to positive polarity keeps pulse voltage rank (Vs/2), during the rising edge to keep the pulse voltage rank from negative polarity, rise to high pressure rising edge pulse voltage rank (Vset_up) with certain degree of tilt, make all discharge cells (cell) form the wall electric charge fully.Again, keep electrode (Z) and form certain potential difference (PD),, keep negative polarity to keep the pulse voltage rank (Vs/2) in order to ensure the generation quantity of wall electric charge with scan electrode.
During the negative edge, after the rising ramp waveform is provided, begin to descend from the positive polarity voltage lower than the ceiling voltage of rising ramp waveform, directly drop to specific voltage level other decline ramp waveform (Ramp_down) littler faint removing discharge takes place in cell (cell), remove the wall electric charge that too much forms in the scan electrode fully than ground voltage (GND) rank.Since above-mentioned negative edge discharge, the residual equably wall electric charge that the quantity of orientation discharge can stably take place in cell (cell).
Again, wherein, in the driving method of plasma display system of the present invention, the negative decline ramp waveform (Ramp_down) that adds.More specifically say, during negative edge, negative adding from rising edge pulse voltage rank (Vset_up), vertically drop to other decline ramp waveform (Ramp_down) of certain reverse voltage level, during the negative edge, negative in addition certain degree of tilt drops to negative polarity scan pulse voltage rank (Vy) above other decline ramp waveform (Ramp_down) of level.
The method of Shi Heing has more: negative adding, vertically drop to negative polarity from rising edge pulse voltage rank (Vset_up) and keep the pulse voltage rank (Vs/2), during the negative edge, drop to negative polarity scan pulse voltage rank (decline ramp waveform (Ramp_down) Vy) with certain degree of tilt, wall state of charge in balanced all discharge cells (cell) guarantees to position between next positioning area the wall amount of charge of discharge.
As mentioned above, with the decline ramp waveform (Ramp_down) of negative edge pulse in the prior art begin from positive polarity or ground voltage different, from reverse voltage, for example, negative polarity keep the pulse voltage rank (Vs/2) beginning, thus shortened length during the negative edge.Shortening along with driving time has improved actuating speed, can realize high definition, again, increase the time degree of freedom when driving, during the keeping of the display frame that relatively can extend with frame (frame), improve the display degree of GTG, improve the image quality that Plasmia indicating panel shows.
At this moment, the method that is more suitable for has: before the beginning, that is, it is preceding to begin above-mentioned decline ramp waveform (Ramp_down) during negative edge, makes the voltage level of keeping electrode (Z) keep the pulse voltage rank from negative polarity and (Vs/2) begins to rise.For example, can rise to ground voltage (GND), as mentioned above, make scan electrode (Y) not overlapping, cushion of the impact of rapid change in voltage the loop with the starting point of keeping the variation of electrode (Z) both end voltage.
During the location (address), the negative polarity scanning impulse (Vy) negative successively being added on the scan electrode, simultaneously, with scanning impulse synchronously, add positive polarity digit pulse (data) to addressing electrode is negative.Above-mentioned scanning impulse (Vy) and the wall voltage addition that produces of the potential difference (PD) of digit pulse (data) and reseting period, thus orientation discharge will take place in the negative discharge cell (cell) that adds digit pulse (data).In the selected cell of orientation discharge (cell), form a certain amount of wall electric charge, it is added when keeping voltage (Vs) negative, can discharge.
Above-mentioned orientation discharge is taken place by above-mentioned digit pulse (data).That is, above-mentioned scanning impulse is negative successively to be added in all discharge cells (cell), but only negative being added in of digit pulse indication takes place discharge-keep in the discharge cell (cell) of discharge, thereby can select to open the discharge cell (cell) of (On).
During keeping, to scan electrode (Y) with keep electrode (Z) alternately negative adding and keep pulse (Sus).By the selected cell of orientation discharge (cell) and since the wall voltage in the cell (cell) with keep impulse summation, negative when adding each and keeping pulse, scan electrode with keep and all keep discharge between electrode, that is, indicate and discharge.
Again, at this moment, in the driving method for plasma display apparatus of the present invention, say more specifically that to retouching electrode (Y) and keeping electrode (Z), each is thought highly of oneself to add and keeps the required voltage of discharge with opposite polarity,, keeps half big or small pulse of voltage (Vs) that is.
For example, if to scan electrode (Y) negative add keep required half the big or small positive polarity of voltage (Vs) of discharge keep pulse (+Vs/2), then electrode (Z) is negative to be added negative polarity and keeps pulse (Vs/2) to keeping, if keep required half the big or small negative polarity of voltage (Vs) of discharge and keep pulse (Vs/2) to scan electrode (Y) negative adding, then to keep electrode (Z) negative add positive polarity keep pulse (+Vs/2), make two interelectrode potential difference (PD) keep Vs, keep discharge.
As mentioned above, with keeping half big or small driven of voltage (Vs), can realize low voltage drive, above-mentioned low voltage drive reduces the bad influence to the loop, guarantees the stability of loop works.That is, can reduce the electric weight of consumption with low voltage drive, again, the infringement that heating is caused is reduced to minimum, also can not keep thermotolerance even heat abstractor-heat radiator (Heat sink) is not installed, and can significantly reduce manufacturing expense.
After keeping the discharge end, if increase during the removing of removing discharge cell (cell) inner wall charge, then during removing, provide pulse height or the low removing ramp waveform voltage of voltage level, thereby remove the interior residual wall electric charge of cell (cell) of whole image to keeping electrode.
Aforesaid, an example of drive waveforms only is an example of lifting for the ease of understanding structure of the present invention, is not in order to limit the present invention.That is,,, then all belong to category of the present invention as long as the structure of patent claim is identical among the present invention even waveform configuration changes to some extent.
Aforesaid, reduce driving voltage, shorten during the negative edge drive waveforms of length and compare with drive waveforms of the prior art: can obtain stable wall state of charge, to this explanation as shown in Figure 6.
Fig. 6 is among the present invention, the wall state of charge synoptic diagram of the driving method of plasma display system.
(a) among Fig. 6 be, during rising edge, and the wall state of charge synoptic diagram that forms by the rising edge discharge of high pressure rising oblique wave pulse generation.Owing to rise to the rising ramp waveform (Ramp_up) of the maximal value (Vset_up) of high voltage rising edge pulse, scanning (Y) electrode is kept in (Z) electrode and numeral (X) electrode and will be formed a lot of wall electric charges.
(b) among Fig. 6 be, during negative edge, and the wall state of charge synoptic diagram that forms in the discharge process that decline ramp waveform (Ramp_down) causes.Because decline ramp waveform (Ramp_down) and the wall electric charge too much piled up is eliminated to some, the wall electric charge in each cell (cell) will be kept in balance.
(c) among Fig. 6 be, during location (address), scanning impulse and digit pulse be negative respectively to be added in wall state of charge synoptic diagram behind scanning (Y) electrode and numeral (X) electrode.Compare with the wall state of charge among Fig. 6 (b), its polarity is opposite.
(d) among Fig. 6 be, during keeping, scanning (Y) electrode with keep (Z) electrode synchronously, the negative respectively positive polarity that adds is kept pulse (Vs/2) and is kept pulse (Vs/2) with negative polarity.Owing to above-mentioned positive polarity is kept pulse (Vs/2) and negative polarity and is kept the pulse (wall voltage that potential difference (PD) Vs/2) produces, with the wall voltage addition in the selected cell (cell) owing to orientation discharge, scanning (Y) electrode and keep between (Z) electrode and will keep discharge, that is indication discharge.
Again, above-mentioned positive polarity keep pulse (Vs/2) and negative polarity keep pulse (Vs/2) as shown in Figure 6, alternately negative adding, shown in Fig. 6 (d '), have opposite polarity with the wall state of charge of (d), therefore, can keep discharge repeatedly.
Aforesaid, the cell (cell) of keeping discharge as mentioned above because orientation discharge is selected.As mentioned above, keep the cell (cell) of discharge and display frame, formed a lot of wall electric charges owing to keep pulse.
Thereby can regulate because orientation discharge and selected, keep unlatching (On) cell (cell) of discharge, with orientation discharge does not take place, and do not keep that the closing in (Off) cell (cell) of discharge is negative to be added, the rising edge pulse of ionic medium display device of the present invention, foregoing as shown in Figure 7.
Fig. 7 a to Fig. 7 b is among the present invention, and the drive waveforms of plasma display system is according to the synoptic diagram of different discharge cell (cell) adjustment.
Orientation discharge does not take place in Fig. 7 a, and do not keep the rising edge pulse during the negative rising edge that adds in (Off) cell (cell) of closing of discharge, Fig. 7 b is selected owing to orientation discharge, keeps the negative rising edge pulse that adds in unlatching (On) cell (cell) of discharge.
Shown in Fig. 7 a, rising edge pulse during the negative rising edge that adds in above-mentioned closing (Off) cell (cell), it is the rising ramp waveform (Ramp_up) that rises to high pressure rising edge voltage max (Vset_up), shown in Fig. 7 b, negative adding in above-mentioned unlatching (On) cell (cell) than the low voltage of rising edge voltage max (Vset_up), for example, positive polarity is kept the square wave of pulse (Vs/2) voltage level.
The aforesaid cell (cell) of keeping discharge, as mentioned above, because orientation discharge and selected.As mentioned above, keep discharge, the cell of display frame (cell) has formed a lot of wall electric charges owing to keep pulse.
This is to make in each cell (cell), the saturated wall electric charge that high pressure rising oblique wave pulse (Ramp_up) is gathered to all discharge cells (cell), and the wall state of charge that too much forms owing to the decline oblique wave pulse (Ramp_up) during the next negative edge, balancedly be eliminated the process of initialization discharge cell (cell).
At this moment, take place to have gathered in the unlatching of keeping discharge (On) cell (cell) of a lot of wall electric charges, need not high pressure rising oblique wave pulse (Ramp_up).This be because, even the negative low square wave of making alive value, state that also can saturated fully wall electric charge, thus reach the effect of rising edge pulse.Again, on as above basis, the magnitude of voltage that reduces the rising edge pulse can improve the contrast-response characteristic of panel.
As mentioned above, plasma display system among the present invention and driving method thereof can drive under low-voltage, and the protection loop reduces manufacturing expense.
Again, plasma display system among the present invention and driving method thereof can reduce the electric weight of consumption.
Again, plasma display system among the present invention and driving method thereof can shorten driving time.
Again, plasma display system among the present invention and driving method thereof can improve image quality.
As mentioned above; though the present invention about plasma display system and driving method thereof with preferred embodiment openly as above; right its is not in order to limit the present invention; any those skilled in the art; under the situation that does not break away from the spirit and scope of the present invention; can carry out various changes and modification, so protection scope of the present invention is as the criterion when looking the claim restricted portion that is proposed.
Claims (18)
1, a kind of plasma display system comprises the Plasmia indicating panel that has scan electrode and keep electrode; It is characterized in that: during the negative edge of subdomain reseting period, the decline ramp waveform that begins to the negative in addition reverse voltage rank of above-mentioned scan electrode, during the keeping of subdomain, keep the scanning driving part that pulse and negative polarity are kept pulse to the alternately negative positive polarity that adds of above-mentioned scan electrode; And with the keeping of subdomain during, with above-mentioned scan electrode negative add keep pulse accordingly, keep to above-mentioned that electrode is negative to add the drive division of keeping that reversed polarity is kept pulse.
2, a kind of plasma display system comprises the Plasmia indicating panel that has scan electrode and keep electrode; It is characterized in that: during the negative edge of subdomain reseting period, the decline ramp waveform that voltage level from pulse to the negative in addition negative polarity of above-mentioned scan electrode that keep begins, during the keeping of subdomain, keep the scanning driving part that pulse and negative polarity are kept pulse to the alternately negative positive polarity that adds of above-mentioned scan electrode; And with the keeping of subdomain during, with above-mentioned scan electrode negative add keep pulse accordingly, keep to above-mentioned that electrode is negative to add the drive division of keeping that reversed polarity is kept pulse.
3, plasma display system according to claim 1 and 2, it is characterized in that: the above-mentioned drive division of keeping, should be during the rising edge of above-mentioned subdomain reseting period, before the beginning, the above-mentioned voltage level of keeping electrode rises from the reverse voltage rank during negative edge.
4, plasma display system according to claim 1 and 2, it is characterized in that: the above-mentioned drive division of keeping, should be during the rising edge of above-mentioned subdomain reseting period, before the beginning, the above-mentioned voltage level of keeping electrode rises to ground voltage from the reverse voltage rank during negative edge.
5, plasma display system according to claim 1 and 2, it is characterized in that: above-mentioned scanning driving part or above-mentioned keeping in the drive division, during above-mentioned positive polarity is kept pulse and above-mentioned negative polarity and kept the magnitude of voltage of pulse and be above-mentioned keeping, keep half of the required voltage of discharge.
6, plasma display system according to claim 1 and 2, it is characterized in that: above-mentioned scanning driving part, during the rising edge of subdomain reseting period, to the negative rising edge pulse that adds of above-mentioned scan electrode, whether keep discharge during should keeping according to previous subdomain, and adjust.
7, plasma display system according to claim 6, it is characterized in that: above-mentioned scanning driving part, during the rising edge of above-mentioned subdomain reseting period, during keeping, keeps above-mentioned previous subdomain that the negative rising edge pulse that adds should be a square wave in the cell of discharge.
8, plasma display system according to claim 7 is characterized in that: above-mentioned scanning driving part, the maximum voltage value that makes above-mentioned square wave is identical with the maximum voltage value that above-mentioned positive polarity is kept pulse.
9, plasma display system according to claim 1 and 2, it is characterized in that: above-mentioned scanning driving part, make the voltage level of the point of above-mentioned decline ramp waveform end, be added on the above-mentioned scan electrode voltage level height of negative polarity scanning impulse than negative during the location.
10, a kind of driving method of plasma display system, plasma display system comprises scan electrode and keeps electrode, it is characterized in that: during the negative edge of subdomain reseting period, the decline ramp waveform that begins to the negative in addition reverse voltage rank of above-mentioned scan electrode; During the keeping of subdomain, add that positive polarity is kept pulse and negative polarity is kept pulse to above-mentioned scan electrode is alternately negative; During the keeping of subdomain, with above-mentioned scan electrode negative add keep pulse accordingly, keep to above-mentioned that electrode is negative to be added reversed polarity and keep pulse.
11, a kind of driving method of plasma display system, plasma display system comprises scan electrode and keeps electrode, it is characterized in that: during the negative edge of subdomain reseting period, the decline ramp waveform that voltage level from pulse to the negative in addition negative polarity of above-mentioned scan electrode that keep begins; During the keeping of subdomain, add that positive polarity is kept pulse and negative polarity is kept pulse to above-mentioned scan electrode is alternately negative; During the keeping of subdomain, with above-mentioned scan electrode negative add keep pulse accordingly, keep to above-mentioned that electrode is negative to be added reversed polarity and keep pulse.
12, according to the driving method of claim 10 or 11 described plasma display systems, it is characterized in that: during the rising edge of above-mentioned subdomain reseting period, before the beginning, the above-mentioned voltage level of keeping electrode rises from the reverse voltage rank during negative edge.
13, according to the driving method of claim 10 or 11 described plasma display systems, it is characterized in that: during the rising edge of above-mentioned subdomain reseting period, before the beginning, the above-mentioned voltage level of keeping electrode rises to ground voltage from the reverse voltage rank during negative edge.
14, according to the driving method of claim 10 or 11 described plasma display systems, it is characterized in that: during above-mentioned positive polarity is kept pulse and above-mentioned negative polarity and kept the magnitude of voltage of pulse and be above-mentioned keeping, keep half of the required voltage of discharge.
15, according to the driving method of claim 10 or 11 described plasma display systems, it is characterized in that: during the rising edge of subdomain reseting period, to the negative rising edge pulse that adds of above-mentioned scan electrode, whether keep discharge during should keeping according to previous subdomain, and adjust.
16, the driving method of plasma display system according to claim 15, it is characterized in that: during the rising edge of above-mentioned subdomain reseting period, keep during above-mentioned previous subdomain is kept that the negative rising edge pulse that adds should be a square wave in the cell of discharge.
17, the driving method of plasma display system according to claim 16 is characterized in that: the maximum voltage value of above-mentioned square wave is identical with the maximum voltage value that above-mentioned positive polarity is kept pulse.
18, according to the driving method of claim 10 or 11 described plasma display systems, it is characterized in that: the voltage level of the point that above-mentioned decline ramp waveform finishes, be added on the above-mentioned scan electrode voltage level height of negative polarity scanning impulse than negative during the location.
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| JP2003066898A (en) * | 2001-06-12 | 2003-03-05 | Matsushita Electric Ind Co Ltd | Plasma display device and driving method thereof |
| US20030122740A1 (en) * | 2001-12-28 | 2003-07-03 | Lg Electronics Inc. | Method and apparatus for driving plasma display panel |
| US20030189534A1 (en) * | 2002-04-04 | 2003-10-09 | Lg Electronics Inc. | Method for driving plasma display panel |
| CN1619622A (en) * | 2003-11-21 | 2005-05-25 | Lg电子株式会社 | Method of driving plasma display panel |
| US6940475B2 (en) * | 2002-04-25 | 2005-09-06 | Fujitsu Hitachi Plasma Display Limited | Method for driving plasma display panel and plasma display device |
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| KR100551123B1 (en) * | 2003-12-22 | 2006-02-13 | 엘지전자 주식회사 | Driving Method of Plasma Display Panel |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2003066898A (en) * | 2001-06-12 | 2003-03-05 | Matsushita Electric Ind Co Ltd | Plasma display device and driving method thereof |
| US20030122740A1 (en) * | 2001-12-28 | 2003-07-03 | Lg Electronics Inc. | Method and apparatus for driving plasma display panel |
| US20030189534A1 (en) * | 2002-04-04 | 2003-10-09 | Lg Electronics Inc. | Method for driving plasma display panel |
| US6940475B2 (en) * | 2002-04-25 | 2005-09-06 | Fujitsu Hitachi Plasma Display Limited | Method for driving plasma display panel and plasma display device |
| CN1619622A (en) * | 2003-11-21 | 2005-05-25 | Lg电子株式会社 | Method of driving plasma display panel |
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