CN103021324B - The pixel scan method of plasma display - Google Patents
The pixel scan method of plasma display Download PDFInfo
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- CN103021324B CN103021324B CN201210571931.8A CN201210571931A CN103021324B CN 103021324 B CN103021324 B CN 103021324B CN 201210571931 A CN201210571931 A CN 201210571931A CN 103021324 B CN103021324 B CN 103021324B
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Abstract
The present invention relates to a kind of pixel scan method of plasma display, concrete will relate to a kind of method reducing the plasma display vedio data scanning display of plasma display panel power consumption.The pixel scan method of the plasma display that the present invention proposes, its method may be summarized to be: by the control to line scanning mode and column scan data, thus realize the power consumption reducing plasma display, then by statistics (n-1)th row and the Data flipping number of n-th line and the Data flipping number of the n-th-2 row and n-th line, and compare, thus determine to use progressive scan mode or interlace mode, again by the Data flipping number of statistics with two sub-pixels adjacent in a line, and carry out threshold classification, thus determine that display maintains control mode.Beneficial effect of the present invention is the Data flipping rate and the dynamic power consumption that effectively reduce column scan driving chip, thus reduces PDP Overall Power Consumption, extends the PDP life-span.The present invention is particularly useful for plasma display.
Description
Technical field
The present invention relates to a kind of pixel scan method of plasma display, concrete will relate to a kind of method reducing the plasma display vedio data scanning display of plasma display panel power consumption.
Background technology
The pixel scan mode of current plasma display (PDP, PlasmaDisplayPanel) is: be expert at scan period (address period), and column scan provides data to determine the ON/OFF of scan line pixel, thus the displaying contents on control lines direction; After completing the display of one-row pixels point data, start to scan next line pixel, until last column, namely complete the display of a two field picture.PDP adopts a kind of sub-frame drive technology, and the cycle of a two field picture is divided into some subframes by it, and the number of subframe is decided by the bit number of logo video signal quantization.Each subframe needs address period, with correctly light should be luminous pixel.
Take display frequency as the video of 60Hz, resolution 1024*768 be example, if a frame is divided into 10 subframes to show, then subframe display frequency is 600Hz, and so addressing frequency and column scan data frequency are 460.8KHz.Column scan mainly contains row description driving chip and carries out, and the dynamic power consumption of column scan driving chip is embodied in its Data flipping rate, thus affects the power consumption of PDP complete machine.Suppose that display one interlaced data image (light by odd-numbered line, even number line is not lighted), when showing a subframe with progressive scan mode, column scan driving chip needs upset 768 times, one two field picture overturns 768*10=7680 time altogether, now column scan driving chip Data flipping rate and dynamic power consumption are very large, and long-term work like this will reduce the PDP life-span.
Summary of the invention
Problem solved by the invention, be exactly for traditional plasma display the deficiency of pixel scan mode, a kind of pixel scan mode reducing plasma display panel power consumption is proposed.
The present invention solves the problems of the technologies described above adopted technical scheme: a kind of pixel scan method of plasma display, is characterized in that, comprise the following steps:
A. arrange the first data-carrier store and the second data-carrier store, described first data-carrier store stores the (n-1)th row R/G/B data, and described second data-carrier store stores the n-th-2 row R/G/B data, and wherein n is the current scan line in pixel scanning;
B. the data difference of current scan line n each sub-pixel point sub-pixel point corresponding with the (n-1)th row is obtained, if this data difference is greater than lower threshold of lining by line scan, then overturn number cumulative 1 line by line, obtain the data difference of current scan line n each sub-pixel point sub-pixel point corresponding with the n-th-2 row simultaneously, if this data difference is greater than staggered scanning lower threshold, then interlacing upset number cumulative 1, described in line by line scan lower threshold and staggered scanning lower threshold inputted by input equipment;
C. judge that whether overturn number is line by line greater than interlacing upset number, if so, then adopts progressive scan mode, if not, then adopts interlace mode, first scan odd-numbered line, then scan even number line.
Concrete, further comprising the steps of:
D. the difference of the data of adjacent two sub-pixels of current line n is obtained, if this value is greater than consecutive point difference lower threshold, then consecutive point difference number cumulative 1, described consecutive point lower threshold is inputted by input equipment;
E., 4 interval values are set, be respectively the first interval value, second interval value, 3rd interval value and the 4th interval value, if consecutive point lower threshold belongs to the first interval value, then current display maintains control mode and adopts data to reduce by half display mode, if consecutive point lower threshold belongs to the second interval value, then current display maintains control mode and adopts display brightness control mode, if consecutive point lower threshold belongs to the 3rd interval value, then current display maintains control mode and adopts control mode of holding time, if consecutive point lower threshold belongs to the 4th interval value, then current display maintains control mode employing subframe and independently lights control mode, if consecutive point lower threshold does not belong to any interval value, then maintain control mode to current display to be left intact.The process that reduces by half of described data is specially, 5 sub-frame datas are only had as the data of 10 subframes being reduced to, described display brightness control mode is specially, display brightness control table is set, this table is made up of the brightness degree that the every one-level of R/G/B data is corresponding, it is lower that its brightness degree compares general case, described control mode of holding time is specially, setting is held time control table, this table is held time by corresponding the lighting of the every one-level of R/G/B data and is formed, this is held time, and to compare general case lower, described subframe is independently lighted control mode and is specially, subframe is set and independently lights control table, this table is lighted by this subframe that the every bit of R/G/B data is corresponding or the control command that do not work forms.
Concrete, described interlace mode is the scan mode every multirow.
Beneficial effect of the present invention is, effectively reduces Data flipping rate and the dynamic power consumption of column scan driving chip, thus reduces PDP Overall Power Consumption, extends the PDP life-span.
Accompanying drawing explanation
Fig. 1 is the logic diagram of embodiment;
Fig. 2 is the method flow schematic diagram of embodiment.
Embodiment
Below in conjunction with drawings and Examples, describe technical scheme of the present invention in detail:
The pixel scan method of a kind of plasma display of the present invention, key step is: first arrange the first data-carrier store and the second data-carrier store, described first data-carrier store stores the (n-1)th row R/G/B data, described second data-carrier store stores the n-th-2 row R/G/B data, and wherein n is the current scan line in pixel scanning; Then the data difference of current scan line n each sub-pixel point sub-pixel point corresponding with the (n-1)th row is obtained, if this data difference is greater than lower threshold of lining by line scan, then overturn number cumulative 1 line by line, obtain the data difference of current scan line n each sub-pixel point sub-pixel point corresponding with the n-th-2 row simultaneously, if this data difference is greater than staggered scanning lower threshold, then interlacing upset number cumulative 1, described in line by line scan lower threshold and staggered scanning lower threshold inputted by input equipment; Finally judge that whether overturn number is line by line greater than interlacing upset number, if so, then adopts progressive scan mode, if not, then adopts interlace mode, first scan odd-numbered line, then scan even number line.
In order to realize reducing power consumption further, present invention also offers the display maintenance method controlling display:
First the difference of the data of adjacent two sub-pixels of current line n is obtained, if this value is greater than consecutive point difference lower threshold, then consecutive point difference number cumulative 1, described consecutive point lower threshold is inputted by input equipment, then 4 interval values are set, be respectively the first interval value, second interval value, 3rd interval value and the 4th interval value, if consecutive point lower threshold belongs to the first interval value, then current display maintains control mode and adopts data to reduce by half display mode, if consecutive point lower threshold belongs to the second interval value, then current display maintains control mode and adopts display brightness control mode, if consecutive point lower threshold belongs to the 3rd interval value, then current display maintains control mode and adopts control mode of holding time, if consecutive point lower threshold belongs to the 4th interval value, then current display maintains control mode employing subframe and independently lights control mode, if consecutive point lower threshold does not belong to any interval value, then maintain control mode to current display to be left intact.The process that reduces by half of described data is specially, 5 sub-frame datas are only had as the data of 10 subframes being reduced to, described display brightness control mode is specially, display brightness control table is set, this table is made up of the brightness degree that the every one-level of R/G/B data is corresponding, it is lower that its brightness degree compares general case, described control mode of holding time is specially, setting is held time control table, this table is held time by corresponding the lighting of the every one-level of R/G/B data and is formed, this is held time, and to compare general case lower, described subframe is independently lighted control mode and is specially, subframe is set and independently lights control table, this table is lighted by this subframe that the every bit of R/G/B data is corresponding or the control command that do not work forms.
Concrete, described interlace mode is the scan mode every multirow.
Embodiment:
As shown in Figure 1, in the present embodiment, the pixel scan control module of PDP is made up of 2 storeies, row data statistics module, column data statistical module and control center.
Wherein, storer 1 stores the n-th-2 row data, and storer 2 stores the (n-1)th row data, wherein R/G/B data 10 bits respectively, and every 10 bits represent the value of a sub-pixel, and 30 bits represent the value of a pixel.
When receiving n-th line data, reading storer 1 and storer 2 obtain the n-th-2 row and the corresponding pixel point value of the (n-1)th row simultaneously, data are entered in row data statistics module and add up, and n-th line data added up in column data statistical module.Finally by n-th line data stored in storer, if n is odd number, then stored in storer 1, if n is even number, then stored in storer 2.
Be expert in data statistics module, calculate and overturn number and interlacing upset number line by line, its method as shown in Figure 2, is specially:
If | P
(n-1, i)-P
(n, i)| > LBL_TH, then LBL_NUM=LBL_NUM+1;
If | P
(n-2, i)-P
(n, 1)| > ILD_TH, then ILD_NUM=ILD_NUM+1;
Wherein, P (n, i) represents n-th line i-th pixel; LBL_TH represents bottom threshold of lining by line scan, and ILD_TH represents staggered scanning bottom threshold, and LBL_NUM represents and overturns number line by line, and ILD_NUM represents and overturns number line by line.
In column data statistical module, calculate current line consecutive point difference number, its method is:
If | P
(n, i)-P
(n, i-1)| > Neb_TH, then Neb_NUM=Neb_NUM+1;
Wherein, P (n, i) represents n-th line i-th pixel, and Neb_TH represents consecutive point discrepancy threshold lower limit, and Neb_NUM represents consecutive point difference number.Control center with LBL_NUM, ILD_NUM for foundation, judge adopt staggered scanning or line by line scan, take Neb_NUM as foundation, judge carry out data reduce by half process or call special illuminometer or call special maintenance pulse meter or call special subframe mapping table mode, here the data process that reduces by half is specially, and the data of 10 subframes is reduced to and only has 5 sub-frame datas.
Call special illuminometer to be specially, this table is brightness degree corresponding to the every one-level of R/G/B data, and it is lower that this brightness degree compares general case.
Call special maintenance pulse meter to be specially, this table is that corresponding the lighting of the every one-level of R/G/B data is held time, and this is held time, and to compare general case lower.
Call special subframe mapping table to be specially, this table is the situation that this subframe that the every bit of R/G/B data is corresponding is lighted or do not worked.Its method is:
(formula 1)
(formula 2)
According to the result of formula 1 and formula 2, make the selection of scan mode.It should be noted that, parameter LBL_TH, ILD_TH, Neb_TH, threshold value 1 ~ threshold value 8 can be configured by external memory storage, data bus mode or directly be inputted by input equipment, and parameter can adjust in real time.
Claims (3)
1. the pixel scan method of plasma display, is characterized in that, comprise the following steps:
A. arrange the first data-carrier store and the second data-carrier store, described first data-carrier store stores the (n-1)th row R/G/B data, and described second data-carrier store stores the n-th-2 row R/G/B data, and wherein n is the current scan line in pixel scanning;
B. the data difference of current scan line n each sub-pixel point sub-pixel point corresponding with the (n-1)th row is obtained, if this data difference is greater than lower threshold of lining by line scan, then overturn number cumulative 1 line by line, obtain the data difference of current scan line n each sub-pixel point sub-pixel point corresponding with the n-th-2 row simultaneously, if this data difference is greater than staggered scanning lower threshold, then interlacing upset number cumulative 1, described in line by line scan lower threshold and staggered scanning lower threshold inputted by input equipment;
C. judge that whether overturn number is line by line greater than interlacing upset number, if so, then adopts progressive scan mode, if not, then adopts interlace mode.
2. the pixel scan method of plasma display according to claim 1, is characterized in that, further comprising the steps of:
D. the difference of the data of adjacent two sub-pixels of current line n is obtained, if this value is greater than consecutive point difference lower threshold, then consecutive point difference number cumulative 1, described consecutive point difference lower threshold is inputted by input equipment;
E., 4 interval values are set, be respectively the first interval value, second interval value, 3rd interval value and the 4th interval value, if consecutive point difference lower threshold belongs to the first interval value, then current display maintains control mode and adopts data to reduce by half display mode, if consecutive point lower threshold belongs to the second interval value, then current display maintains control mode and adopts display brightness control mode, if consecutive point lower threshold belongs to the 3rd interval value, then current display maintains control mode and adopts control mode of holding time, if consecutive point difference lower threshold belongs to the 4th interval value, then current display maintains control mode employing subframe and independently lights control mode, if consecutive point difference lower threshold does not belong to any interval value, then maintain control mode to current display to be left intact.
3. the pixel scan method of plasma display according to claim 1 and 2, is characterized in that, described interlace mode is the scan mode every multirow.
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| CN1906656A (en) * | 2004-01-16 | 2007-01-31 | 夏普株式会社 | Liquid crystal display device, liquid crystal display device signal processing device, program thereof, recording medium, and liquid crystal display control method |
| CN101447166A (en) * | 2007-11-28 | 2009-06-03 | 三星Sdi株式会社 | Plasma display device and driving method thereof |
| JP4320989B2 (en) * | 2001-11-01 | 2009-08-26 | 株式会社日立製作所 | Display device |
| CN102714008A (en) * | 2009-12-24 | 2012-10-03 | 欧丽安株式会社 | Drive device and method for a plasma display panel |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4320989B2 (en) * | 2001-11-01 | 2009-08-26 | 株式会社日立製作所 | Display device |
| CN1906656A (en) * | 2004-01-16 | 2007-01-31 | 夏普株式会社 | Liquid crystal display device, liquid crystal display device signal processing device, program thereof, recording medium, and liquid crystal display control method |
| CN101447166A (en) * | 2007-11-28 | 2009-06-03 | 三星Sdi株式会社 | Plasma display device and driving method thereof |
| CN102714008A (en) * | 2009-12-24 | 2012-10-03 | 欧丽安株式会社 | Drive device and method for a plasma display panel |
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