CN100399382C - Method and device for eliminating dynamic quasi-contour of flat plasma display device - Google Patents
Method and device for eliminating dynamic quasi-contour of flat plasma display device Download PDFInfo
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- CN100399382C CN100399382C CNB011314133A CN01131413A CN100399382C CN 100399382 C CN100399382 C CN 100399382C CN B011314133 A CNB011314133 A CN B011314133A CN 01131413 A CN01131413 A CN 01131413A CN 100399382 C CN100399382 C CN 100399382C
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Abstract
The present invention relates to a method and a device for reducing the phenomenon of the dynamic simulation contour of a plasma plane display. Mainly, the plasma plane display can convert the same gray scale value which needs to be displayed by each discharge unit on continuous dynamic graph fields to the same gray scale value with different visual gravity center series by using a visual gravity center converting table when each graph field of dynamic images is displayed, so that the discharge units corresponding to each subgraph field of each dynamic graph field can respectively present the same gray scale to be displayed according to continuous luminescence frequencies corresponding to the gray scale values of the different visual gravity center series in the process of continuously displaying the dynamic graph fields. Thus, the visual gravity center with different gray scale values, which is presented by the two adjacent discharge units of each dynamic graph filed, is respectively averaged into gray scale values with small visual gravity center gaps. Therefore, the present invention effectively solves the problem of the phenomenon of the dynamic simulation contour caused by the large visual gravity center gaps of the gray scale values of the two adjacent discharge units.
Description
Technical field
The present invention relates to the flat plasma display field, especially a kind of method and device that reduces flat plasma display dynamic quasi profile phenomenon, can make flat plasma display when each figure field of video display, can go up the same input GTG value that each discharge cell institute desire shows with dynamically scheming the field continuously, utilize a vision center of gravity conversion table, convert the same GTG value of different vision center of gravity series to, and be presented on method and device thereof on this sequential chart field respectively respectively.
Background technology
On general flat plasma display, the formation of each picture image, all be to utilize its control circuit, according to image data to display, control R (red), the G (Green) that forms each picture point on this plasma flat-panel screens, luminous pulse wave (sustain pulse) number of times of B (Blue) three look discharge cells (cell), with on this picture point respectively, demonstrate the due GTG of each picture, so the color that presented of each picture point, be that brightness and the corresponding color modulation thereof that is continued to produce by this discharge cell respectively forms.In subsequent descriptions of the present invention, each shown on this plasma flat-panel screens picture image can be called a figure (field).General speech, on traditional flat plasma display, a figure the luminous pulse wave of keeping can be distributed in several subgraph fields (subfield), as shown in Figure 1, each subgraph field to keep luminous pulse number different, this plasma flat-panel screens is when showing a figure field, the image data that main system shows according to institute's desire, combination according to each subgraph field, the GTG value that presents each discharge cell on it, make by these subgraph fields and form a complete figure field, present the GTG that should show, this is the ultimate principle of flat plasma display video picture.
This plasma flat-panel screens is when showing a figure field, the GTG value that each discharge cell presented on it, the image data that main system shows according to institute's desire, according to rule shown in Figure 1, define the lasting number of light emission times of the discharge cell of each subgraph field correspondence, make in flat plasma display shows the unit interval of figure place need, the discharge cell of each subgraph field can be according to the proportion of following parameters value and corresponding lasting number of light emission times thereof, discharge, on the discharge cell of this figure field, to present the GTG value that should show:
SF0∶SF1∶SF2∶SF3∶SF4∶SF5∶SF6∶SF7
＝1∶2∶4∶8∶16∶32∶64∶128
Yet; these traditional flat plasma displays are when showing dynamic image frame; on the part position of its image frame; the profile phenomenon of GTG entanglement takes place in regular meeting; promptly generally so-called " dynamic quasi profile phenomenon " (dynamic false contour); this phenomenon will significantly reduce the image quality of flat plasma display.Modern, for explaining this kind " dynamic quasi profile phenomenon ", special figure field with two continuous dynamic images is an example, and the GTG value that is presented respectively at two adjacent discharge cells on it is 127 and 128, consult shown in Figure 2ly, illustrate that the reason that produces this kind " dynamic quasi profile phenomenon " is as follows:
Because, flat plasma display system utilizes the mode that the time cuts apart, control the number of light emission times of each discharge cell on it, make it present different gray scale states (as shown in Figure 1) respectively, so when flat plasma display when playing the figure field of dynamic image, audience's eyes can move along with the image of the dynamic scenery of being watched, at this moment, each point on this eye retina will be along with the image of this dynamic scenery, produce a track route respectively, make the each point on the retina can track the figure field of different GTGs respectively, see also shown in Figure 2.Therefore, when the audience when watching the figure field of two continuous dynamic scenery, if the GTG value that presented on two adjacent discharge cells of this two figure field is respectively 127 and 128, R on its retina
0, R
1Point, the GTG value of experiencing at a discharge cell wherein will be 127, R on its retina
3, R
4Point, the GTG value of experiencing at another discharge cell will be 128, and on retina R
2Point, the GTG value of being experienced then are 0, and the phenomenon of GTG promptly takes place not have fully, see also shown in Figure 3 because the scenery image that is presented on this two adjacent discharge cell, on retina by R
1To R
2And R
2To R
3The interval in, its imaging drop is excessive, makes the image that eyes are experienced, on the boundary position of this two adjacent discharge cell (its GTG value is not 127 and 128), the GTG entanglement will take place, change discontinuous profile phenomenon, this promptly generally so-called " dynamic quasi profile phenomenon ".
The design of flat plasma display and manufacturer for further annotating " dynamic quasi profile phenomenon ", are to define vision barycentric coefficients as follows:
The vision barycentric coefficients=(t1m1+t2m2+t3m3+...)/(m1+m2+m3...),
Wherein m1, m2... are the GTG proportion of the discharge cell of each subgraph field, t1, t2 ... be that the time of the starting point of interdischarge interval (sustain Period) to intermediate point is kept in each subgraph field, as shown in Figure 4.So, according to the result of calculation of this coefficient as can be known, the vision center of gravity of the GTG of two adjacent discharge cells near the time, be difficult for producing " dynamic quasi profile phenomenon ".Therefore,, can make the dealer change, take suitable remedial measures, with effective solution " dynamic quasi profile phenomenon " according to difference therebetween by the vision barycentric coefficients between each electric unit on the analytical calculation flat plasma display.Now be willing to that so that Jap.P. is special flat 8-270869 patent is an example, the method that this patent disclosed is the GTG that utilizes two groups of different vision center of gravity series, according to following manner, presents the GTG of each discharge cell on flat plasma display:
In this patent, if, be defined as following parameters value and corresponding lasting number of light emission times thereof with the GTG value of the discharge cell of each subgraph field:
SF0∶SF1∶SF2∶SF3∶SF4∶SF5∶SF6∶SF7
＝1∶2∶4∶8∶16∶24∶32∶40，
Then on this plasma flat-panel screens, each discharge cell of a figure field can be complied with following two groups of vision center of gravity series, presents GTG 39, that is:
1+2+4+8+24＝39
1+2+4+32＝39，
And can comply with following three groups of vision center of gravity series, present GTG 40, that is:
8+32＝40
16+24＝40
40＝40
By aforementioned patent as can be known, the GTG that is presented on this plasma flat-panel screens, system can multiple vision center of gravity series the GTG value, combined, see also shown in Figure 5, so for solving dynamic quasi profile phenomenon, the GTG that different modes can be combined according to the difference of its vision center of gravity, is distinguished into the GTG value of two groups of different vision center of gravity series of A and B, and with the vision center of gravity of this two serial GTG, give on average, and get its mean value, as the parameter that solves dynamic quasi profile phenomenon, make the vision center of gravity gap of the GTG of two adjacent discharge cells, can thereby dwindle.This patent ties up on the flat plasma display, makes adjacent picture point (pixel) present the GTG value of different vision center of gravity series respectively, sees also shown in Figure 6ly, with the vision center of gravity of average integral body, effectively alleviates dynamic quasi profile phenomenon.This practice, though can make its vision center of gravity comparatively smooth-going, and make its dynamic quasi profile phenomenon, more not obvious, yet, because each discharge cell on the flat plasma display, system makes it present different GTGs by the number of discharge time, so if utilize the GTG of two groups of different vision center of gravity series, on each discharge cell of a figure field, present GTG, will be unfavorable for that its discharge drives the carrying out of operation.
Summary of the invention
Because traditional flat plasma display is when playing dynamic menu, when if the vision center of gravity difference of the GTG that this dynamic menu is presented on two adjacent discharge cells is too big, the image that very easily makes beholder's eyes be experienced, on the boundary position of this two adjacent discharge cell, produce the GTG entanglement, change discontinuous dynamic quasi profile phenomenon.The inventor is through the permanent research and experiment of making great efforts, finally development and Design goes out a kind of method and device that reduces flat plasma display dynamic quasi profile phenomenon of the present invention, make a plasma flat-panel screens, when each figure field of video display, the same input GTG value that each discharge cell institute desire on the continuous dynamic figure field can be shown, utilize a vision center of gravity conversion table, convert thereof into the same GTG value of different vision center of gravity series, make and showing continuously in the process of dynamically scheming the field, each is the discharge cell of each subgraph place correspondence of figure field dynamically, can present the same GTG that should show respectively according to the pairing lasting number of light emission times of the GTG value of different vision center of gravity series.
A purpose of the present invention, tie up to the respectively dynamic vision center of gravity of the different GTG values that presented of figure last two adjacent discharge cells of order, can on average be mixed into the less GTG value of vision center of gravity gap respectively, excessive with effective solution because of the vision center of gravity gap of the GTG value of two adjacent discharge cells, the dynamic quasi profile phenomenon that is taken place.
Another object of the present invention, be to utilize a multiplexer, data selector switch during as this plasma flat-panel screens video display picture, the timely serial vein ripple of the vertical synchronizing signal signal that this multiplexer can be received according to a control circuit, judge the figure field of being exported at present, and certainly in many groups input figure field of the different vision center of gravity series that produced of this vision center of gravity conversion table, select the figure field data of a correspondence, again it is exported to a display circuit, and it is presented on this plasma flat-panel screens by this display circuit, order was when demonstration respectively should be schemed the field continuously, the vision center of gravity of the different GTG values that presented respectively on the wantonly two adjacent discharge cells can on average be mixed into the less GTG value of vision center of gravity gap respectively.
Description of drawings
Figure 1 shows that in showing the time range that a subgraph place needs the synoptic diagram that concerns of keeping interdischarge interval and corresponding parameter thereof of each discharge cell;
Shown in Figure 2 is traditional flat plasma display when showing dynamic image frame, the audience watched two dynamic scenery continuously, and the GTG value that is presented on two adjacent discharge cells is with the synoptic diagram that concerns of the track route of each point on its retina;
Shown in Figure 3 is the imaging synoptic diagram of each point on the retina among Fig. 2;
Fig. 4 keeps the starting point of interdischarge interval to middle required time diagram on the different discharge cells;
Fig. 5 is the flat 8-270869 patent of the special hope of Jap.P., utilizes the GTG of two groups of different vision center of gravity series, adjusts the synoptic diagram of its vision center of gravity;
Fig. 6 is the flat 8-270869 patent of the special hope of Jap.P., utilizes the GTG of two groups of different vision center of gravity series, when adjusting its whole vision center of gravity, and the distribution schematic diagram of different series picture element on each picture point;
Fig. 7 is a most preferred embodiment of the present invention, on two sequential chart fields, utilizes the GTG value of two groups of different vision center of gravity series, when adjusting its whole vision center of gravity, and the distribution schematic diagram of this GTG value respectively;
Fig. 8 be the present invention on the sequential chart field, present wantonly two adjacent discharge cells of different GTG values, utilize the GTG value of three groups of different vision center of gravity series respectively, when adjusting its whole vision center of gravity, the distribution schematic diagram of this GTG value respectively;
Fig. 9 is another most preferred embodiment of the present invention, on two sequential chart fields, utilizes the GTG value of two groups of different vision center of gravity series, when adjusting its whole vision center of gravity, and the distribution schematic diagram of this GTG value respectively;
Figure 10 is the circuit box synoptic diagram of these embodiment of the present invention.
Embodiment
Common people's eyes, view and admire that flat plasma display presents continuously dynamically figure the time, and the GTG value that can't tell each discharge cell on this figure field respectively one by one changes, this be because of eyes when viewing and admiring these sequential chart fields, with a sequence GTG value that is presented on the neighboring discharge cells, on average be mixed into eyes receptible brightness of institute and color, in other words, viewed brightness of eyes and color, it in fact is the respectively mixing of a sequence GTG value on this discharge cell, meaning is the GTG value of arbitrary discharge cell that eyes are experienced, and in fact is to be subjected to that GTG value continually varying influences on this discharge cell and the neighboring discharge cells thereof.
In addition, because general flat plasma display is when showing the sequential chart field, the discharge cell of each subgraph place correspondence in these figure fields, system is according to defined lasting number of light emission times, present the GTG value that should show, and this GTG value can be because of the difference of the lasting number of light emission times of the discharge cell of each subgraph field correspondence, may have at least one group of above vision center of gravity series, so during a certain GTG value of flat plasma display on showing the sequential chart field, system can multiple different vision center of gravity series same GTG value, be presented on these continually varyings figure field, and the GTG that unlikely influence respectively should present on this figure field.
The present invention is promptly according to this theory, make a plasma flat-panel screens, when each figure field of video display, the same input GTG value that each discharge cell institute desire on the continuous dynamic figure field can be shown, utilize a vision center of gravity conversion table, convert thereof into the same GTG value of different vision center of gravity series, make and showing continuously in the process of dynamically scheming the field, each is the discharge cell of each subgraph place correspondence of figure field dynamically, can present the same GTG that should show respectively according to the pairing lasting number of light emission times of the GTG value of different vision center of gravity series.So, respectively should dynamically scheme the GTG value that last two an adjacent discharge cell is presented, will be because of respectively should dynamically scheming continuously in the procedure for displaying of field, be respectively that same GTG value with different vision center of gravity series is presented, so GTG value that this two adjacent discharge cell is presented, can on average be mixed into the less GTG value of vision center of gravity gap respectively, effectively solution is excessive because of the vision center of gravity gap of the GTG value of two adjacent discharge cells, the dynamic quasi profile phenomenon that is taken place.
In a most preferred embodiment of the present invention, see also shown in Figure 7, a because plasma flat-panel screens 10, in each the figure field 20 that shows continuous dynamic image, 21 o'clock, on this plasma flat-panel screens 10 corresponding to this sequential chart field 20 respectively, should produce each discharge cell 11 of same input GTG value on 21, can utilize this vision center of gravity conversion table, this input GTG value is converted to the same GTG value A of different vision center of gravity series, B, make and showing respectively this figure field 20 continuously, 21 o'clock, respectively should scheme field 20, the discharge cell 11 of each subgraph place correspondence of 21, can be respectively according to the GTG value A of different vision center of gravity series, the pairing lasting number of light emission times of B presents the same GTG that should show.Therefore, consult shown in Figure 8, when the vision center of gravity gap of dynamically scheming two 50,51 of adjacent discharge cells present respectively on the field 30,31,32 different GTG value P, Q continuously is excessive, will be because of respectively should dynamically scheming continuously in the procedure for displaying of field 30,31,32, by this vision center of gravity conversion table, respectively this input GTG value P, Q convert the same GTG value P of different vision center of gravity series to respectively
A, P
B, P
C, Q
A, Q
B, Q
CSo, showing continuously respectively and should scheme the field at 30,31,32 o'clock, the different GTG value P that presented respectively on this two adjacent discharge cell 50,51
A, P
B, P
C, Q
A, Q
B, Q
C, its vision center of gravity can on average be mixed into the less GTG value of vision center of gravity gap respectively, efficiently solve because of the vision center of gravity gap of GTG value P, the Q of two adjacent discharge cells 50,51 excessive, the dynamic quasi profile phenomenon that is taken place.
Another most preferred embodiment of the present invention, see Fig. 9, tie up to each figure field 20 of the continuous dynamic image of these plasma flat-panel screens 10 demonstrations, 21 o'clock, order is corresponding to this sequential chart field 20 respectively, should produce each discharge cell 11 of same input GTG value on 21, utilize this vision center of gravity conversion table, this input GTG value is converted to the same GTG value A of different vision center of gravity series, B, and will be respectively should difference vision center of gravity series GTG value A, B is presented at each figure field 20 respectively, on 21 the interval discharge cell 11, and chart spacing field 20, on 21 the corresponding discharge cell 11, make respectively this figure field 20, the discharge cell 11 of each subgraph place correspondence of 21, can be respectively according to the GTG value A of different vision center of gravity series, the pairing lasting number of light emission times of B presents the same GTG that should show.So, dynamically scheme the different GTG values that last two an adjacent discharge cell is presented respectively continuously, will be because of in procedure for displaying, by this vision center of gravity conversion table, convert the same GTG value of different vision center of gravity series respectively to, so when demonstration respectively should be schemed the field continuously, the vision center of gravity of the different GTG values that presented respectively on this two adjacent discharge cell will on average be mixed into the less GTG value of vision center of gravity gap respectively.
The present invention is for realizing previous embodiment, tie up in this plasma flat-panel screens, utilize a multiplexer (Multiplexer) 70, see also shown in Figure 10, data selector switch (Data Selector) when showing dynamic pass picture as this plasma flat-panel screens, the timely serial vein ripple of the vertical synchronizing signal signal that this multiplexer 70 can be received according to a control circuit 60, judge the figure field that to export at present, and in a change-over circuit 80, in many groups input figure field of the different vision center of gravity series that produced according to its vision center of gravity conversion table, select the figure field data of a correspondence, again it is exported to a display circuit 90, and drive respectively this discharge cell by this display circuit 90, be presented on this plasma flat-panel screens should scheme the field, and make this plasma flat-panel screens show continuously respectively should figure field the time, the vision center of gravity of the different GTG values that presented respectively on the wantonly two adjacent discharge cells, can on average be mixed into the less GTG value of vision center of gravity gap respectively, with effective solution because of the excessive dynamic quasi profile phenomenon that is taken place of vision center of gravity gap.
The above embodiment only is explanation technological thought of the present invention and characteristics, its purpose makes the personage who has the knack of this skill can understand content of the present invention and is implementing according to this, when not limiting claim of the present invention with it, promptly the equalization of doing according to disclosed spirit generally changes or modifies, and must be encompassed in the claim scope of the present invention.
Claims (4)
1. method that reduces flat plasma display dynamic quasi profile phenomenon, it is characterized in that: this method is for making a plasma flat-panel screens, when showing each figure field of dynamic effects, same input GTG value that can each discharge cell on the continuous dynamic figure field is shown, utilize a vision center of gravity conversion table, this input GTG value is converted to the same GTG value of different vision center of gravity series, make and showing continuously in the process of dynamically scheming the field, each is the discharge cell of each subgraph place correspondence of figure field dynamically, can present the same GTG that should show respectively according to the pairing lasting number of light emission times of the GTG value of different vision center of gravity series.
2. the method for reduction flat plasma display dynamic quasi profile phenomenon as claimed in claim 1, this vision center of gravity conversion table it is characterized in that: after will be imported the same GTG value that the GTG value converts different vision center of gravity series to, GTG value that respectively should difference vision center of gravity series can be presented at respectively on the corresponding discharge cell of sequential chart field, make the respectively discharge cell of each subgraph place correspondence of this figure field, can present the same GTG that should show respectively according to the pairing lasting number of light emission times of the GTG value of different vision center of gravity series.
3. the method for reduction flat plasma display dynamic quasi profile phenomenon as claimed in claim 1, this vision center of gravity conversion table it is characterized in that: after will be imported the same GTG value that the GTG value converts different vision center of gravity series to, GTG value that respectively should difference vision center of gravity series can be presented at respectively on the interval discharge cell of each figure field, and on the corresponding discharge cell of chart spacing field, make the respectively discharge cell of each subgraph place correspondence of this figure field, can present the same GTG that should show respectively according to the pairing lasting number of light emission times of the GTG value of different vision center of gravity series.
4. device that reduces flat plasma display dynamic quasi profile phenomenon is characterized in that: comprising:
One plasma flat-panel screens which is provided with a plurality of discharge cells;
One change-over circuit, be provided with a vision center of gravity conversion table in it, make this change-over circuit when receiving the figure field signal of an input, the figure field signal of this input can be corresponded to the respectively GTG value of this discharge cell, by this vision center of gravity conversion table, convert the same GTG value of the different vision center of gravity of plural groups series to;
One control circuit is in order to accept the timely serial vein ripple of vertical synchronizing signal signal;
One multiplexer, for being connected with this change-over circuit and control circuit respectively, with the signal that transmits according to this control circuit, judge the figure field that to export at present, and according to this in the plural picture group field that this change-over circuit produced, select the figure field of a correspondence, again it is exported to a display circuit, and drive respectively this discharge cell by this display circuit, be presented on this plasma flat-panel screens should scheme the field, make and showing continuously that respectively should figure field the time, the vision center of gravity of the different GTG values that presented respectively on the wantonly two adjacent discharge cells can on average be mixed into the less GTG value of vision center of gravity gap respectively.
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| CN100578584C (en) * | 2006-07-17 | 2010-01-06 | 中华映管股份有限公司 | Driving mechanism for plasma display panel and driving method thereof |
Citations (5)
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| CN1201216A (en) * | 1997-04-02 | 1998-12-09 | 松下电器产业株式会社 | Image displaying apparatus |
| JPH11231827A (en) * | 1997-07-24 | 1999-08-27 | Matsushita Electric Ind Co Ltd | Image display device and image evaluating device |
| US6091396A (en) * | 1996-10-14 | 2000-07-18 | Mitsubishi Denki Kabushiki Kaisha | Display apparatus and method for reducing dynamic false contours |
| JP2000242226A (en) * | 1999-02-19 | 2000-09-08 | Fujitsu Ltd | Gray level display method and display device |
| CN1284704A (en) * | 1999-08-12 | 2001-02-21 | 达碁科技股份有限公司 | Plasma display driving device and method capable of eliminating dynamic error contour |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6091396A (en) * | 1996-10-14 | 2000-07-18 | Mitsubishi Denki Kabushiki Kaisha | Display apparatus and method for reducing dynamic false contours |
| CN1201216A (en) * | 1997-04-02 | 1998-12-09 | 松下电器产业株式会社 | Image displaying apparatus |
| JPH11231827A (en) * | 1997-07-24 | 1999-08-27 | Matsushita Electric Ind Co Ltd | Image display device and image evaluating device |
| JP2000242226A (en) * | 1999-02-19 | 2000-09-08 | Fujitsu Ltd | Gray level display method and display device |
| CN1284704A (en) * | 1999-08-12 | 2001-02-21 | 达碁科技股份有限公司 | Plasma display driving device and method capable of eliminating dynamic error contour |
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