CN100380421C - Driving method for increasing brightness of AC PDP image - Google Patents
Driving method for increasing brightness of AC PDP image Download PDFInfo
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- CN100380421C CN100380421C CNB2005100961531A CN200510096153A CN100380421C CN 100380421 C CN100380421 C CN 100380421C CN B2005100961531 A CNB2005100961531 A CN B2005100961531A CN 200510096153 A CN200510096153 A CN 200510096153A CN 100380421 C CN100380421 C CN 100380421C
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Abstract
The present invention relates to an image processing method for improving the brightness of AC PDP images. Display pixels in different subfields are counted. The display subfields are arranged again according to the counting result, and maintaining pulses of each subfield are distributed again. Thereby, the present invention can achieve the purpose of improving the brightness of the images.
Description
Technical field
The present invention relates to the image processing method of a kind of AC plasma display (hereinafter to be referred as AC PDP), be particularly related to a kind of image processing method of the AC of raising PDP brightness of image, display message by different sons field during image is shown is added up, reset the son when showing and redistribute the pulse of keeping of each son according to this statistics, and then realize improving the purpose of display image brightness.
Background technology
AC PDP adopts the mode of son field to realize that many gray scales show when image shows.The demonstration time of one two field picture is divided into a plurality of sons field, and each son field comprises preparatory stage, address period, demonstration phase, and the preparatory stage is that the full-screen pixels unit is discharged, and makes it to reach state consistency and produces certain space ion concentration; Address period is then according to view data, and whether decision produces discharge between addressing electrode on the metacoxal plate and the scan electrode on the prebasal plate, and the pixel cell that show produces discharge, and the unit that does not need to show then need not discharge; The phase of keeping then is to apply certain demonstration pulse at scan electrode on the electrode with keeping, the pixel cell that address period produces discharge can continue Discharge illuminating, the pixel cell that address period does not produce Discharge illuminating then can not Discharge illuminating, comes the demonstration of control chart as pixel cell like this.
In the scan mode more than adopting, address period has taken long time, leave for and keep then tangible deficiency of luminous time, such as being the VGA signal of 852*480 for resolution, wherein frame frequency is 60Hz, and the time of scanning delegation is 1.75us, each two field picture is divided into 11 son fields and shows (if the son field very little, significantly false contouring then can appear when showing dynamic image), then the shared time of address period is: 1.75*480*11=9.24ms, if removing out the shared time of reset period, so, the phase of keeping, shared fluorescent lifetime just showed 35% of the time (16.67ms) less than a frame, had influenced the raising of brightness of image greatly.
By above analysis as can be known, the method that improves brightness of image is exactly the time that increases the phase of keeping, the time of compression address period.When address period, the addressing time of each row and display screen structure and contained gas are associated, and are compressed with certain limit; If reduce the number of addressed row, then image resolution ratio then reduces, and influences the quality of image; If reduce the number of son field, when then showing dynamic image, dynamic false contours can increase, and reduces the quality of image.
Summary of the invention
The objective of the invention is to overcome the shortcoming of above-mentioned technology, a kind of image processing method of the ACPDP of raising brightness of image has been proposed, a difference display pixel is added up, reset the son when showing and redistribute the pulse of keeping of each son according to statistics, reach the purpose that improves brightness of image.
Technical scheme implementation procedure of the present invention is:
A kind of image processing method that improves AC PDP brightness of image, adopt sub-field type to realize that many grades gray scale of image shows, it is characterized in that, the display error addition of the raw data of present frame and the previous frame that sends from the frame error storer, its result is as the required gray-scale displayed grade of present frame, and note is done gray shade scale to be shown.Gray shade scale to be shown is transformed into the sub-field data of predefined sub-number of fields purpose through sub-field transformation module with original gray-scale data, and the data after the conversion are sent to the frame data storer on the one hand, the data that all sub-places need when showing as present frame; On the other hand, the data after the conversion are sent to the son field and light the pixels statistics module.Light in the pixels statistics module at Zi Chang, each data of lighting of sub is added up respectively, so, when just obtaining the demonstration of different sons field, the pixel cell number that pairing needs are lighted is sent to display message with statistics and forms module.Form module in display message, number of pixels is lighted in each son field of statistics to be compared with predefined each son corresponding threshold value, if number of pixels is lighted less than predefined threshold value that should the child field in certain son field of statistics, so, just judge that this child field does not show, otherwise, then should show the child field, all son fields are compared with corresponding threshold value, obtain sub-field information to display, be which son field need show, which son field does not need to show; The display message that sub-field information formation module forms is sent to respectively keeps pulse distribution module and error formation module, and in keeping the pulse distribution module, according to display message, paired pulses is redistributed; Form module in error, form the data presentation error of present frame together, and store the compensation of the video data addition conduct of frame error storer and next frame into the present frame display error according to display message with from the data that the frame data storer is brought.
Light in the pixels statistics module in each son field, the step that data of lighting of each son field are added up respectively is: for each son field is provided with a counter, each data 0 or 1 of sub is carried out addition.Different sub-field data to a two field picture is carried out addition, just obtains the display message of different sons field, wherein 0 represents this child field to show that on behalf of this child field, 1 do not show.
Form module in display message, need set in advance compare threshold of each son, when the threshold value that is provided with than authority baryon field, the threshold value setting is the smaller the better usually, and for the threshold value of less weight, what can be provided with is big relatively.Like this, could guarantee that the distortion of image is less.Usually, the weight of group field was greater than 20% o'clock of the highest gray shade scale, and threshold value is set to be not more than 1% of the plain number of whole screen image, and the weight of group field was less than 5% o'clock of the highest gray shade scale, and threshold value is set to be not more than 5% of the plain number of whole screen image.
When forming display message, usually only determine one or two son field that does not show to get final product, because, reducing one or two son field, the addressing time of its saving can obviously be improved brightness of image, at this moment, distortion to image is also more limited, still, if reduce more a plurality of sons field, though the brightness of image can bigger raising, image fault can be more obvious.
Keep the pulse distribution module redistribute each son keep pulse the time, the maximum that needs to realize is kept pulse number and is redistributed according to weight of each son, distribution principle is:
Wherein: S
iNumber after i the son field that shows for needs kept pulse and redistributed;
S
TFor after certain or certain a little field do not show, the maximum number of pulses that can realize;
L
iI sub weight for the needs demonstration.
Handle by adopting above method, when actual displayed, according to statistical information, do not show son (number of pixels is less than predefined numerical value) a certain or that certain a little mid point bright pixel unit is less, then the maximum that can realize under this demonstration situation being kept pulse number redistributes, owing to increased and kept pulse number, finally realized improving the purpose of brightness of image.
Description of drawings
Accompanying drawing is the principle schematic of the inventive method.
The present invention is described in further detail below in conjunction with accompanying drawing.
In AC PDP, adopt the mode of son field to realize that visual multi-grayscale shows, be about to each frame displayed image and be divided into the field demonstration of a plurality of sons, each son corresponding certain gray shade scale, the combination by to these a plurality of sub-fields realizes all gray shade scales.When showing, each son field comprised reset, addressing and three cycles of demonstration.Wherein address period has taken long time, and like this, the fluorescent lifetime of leaving the phase of keeping for just reduces greatly, has influenced the raising of brightness of image.
The present invention is by image information being added up, redefine the son field that will show according to statistics, like this, can increase the time of the phase of keeping, realizing improving the purpose of brightness of image.Because when present frame showed, the sub-field data that has did not show, has error so between desirable brightness and actual displayed brightness, this error compensates when next frame shows.
Referring to accompanying drawing, the display error addition of the raw data of present frame and the previous frame that sends from the frame error storer, its result is as the required gray-scale displayed grade of present frame, and note is done gray shade scale to be shown.Gray shade scale to be shown is transformed into the sub-field data of predefined sub-number of fields purpose through sub-field transformation module with original gray-scale data, and the data after the conversion are sent to the frame data storer on the one hand, the data that all sub-places need when showing as present frame; On the other hand, data after the conversion are sent to the son field and light the pixels statistics module, light in the pixels statistics module at Zi Chang, the data of lighting of each son field are added up respectively, so, when just obtaining the demonstration of different sons field, the pixel cell number that pairing needs are lighted, statistics is sent to display message forms module, form module in display message, number of pixels is lighted in each son field of statistics to be compared with predefined each son corresponding threshold value, if number of pixels is lighted less than predefined threshold value that should the child field in certain son field of statistics, so, just judge that this child field does not show, otherwise, then should show the child field, all son fields are compared with corresponding threshold value, obtain sub-field information to display, be which son field need show, which son field does not need to show, the display message that sub-field information formation module forms is sent to respectively keeps pulse distribution module and error formation module, in keeping the pulse distribution module, according to display message, paired pulses is redistributed, and forms module in error, according to display message with form the data presentation error of present frame together from the data that the frame data storer is brought, and the video data addition of storing frame error storer and next frame into is as the compensation to the present frame display error.
Light in the pixels statistics module in each son field, the step that data of lighting of each son field are added up respectively is: for each son field is provided with a counter, each data 0 or 1 of sub is carried out addition.Different sub-field data to a two field picture is carried out addition, just obtains the display message of different sons field.Wherein, 0 represent this child field to show that on behalf of this child field, 1 do not show.
Form module in display message,, compare with predefined each son corresponding threshold with the statistics of each son point bright pixel, if the statistics of certain son point bright pixel is less than corresponding threshold, so, the display message that this child field is set is 1, otherwise, be set to 0.When setting the threshold value of each son field, because the son brightness to image that weight is bigger influences bigger, if it is bigger that threshold value is set, for needing highlighted some part that highlights then can't show in the image, the distortion that causes image to show, so when the threshold value that is provided with than authority baryon field, what be provided with usually is the smaller the better; And, can be provided with greatly relatively for the threshold value of less weight.Usually, the weight of group field was greater than 20% o'clock of the highest gray shade scale, and threshold value is set to be not more than 1% of the plain number of whole screen image, and the weight of group field was less than 5% o'clock of the highest gray shade scale, and threshold value is set to be not more than 5% of the plain number of whole screen image.
When forming display message, usually only determine one or two son field that does not show to get final product, because, reducing one or two son field, the addressing time of its saving can obviously be improved brightness of image, at this moment, distortion to image is also more limited, still, if reduce more a plurality of sons field, though the brightness of image can bigger raising, image fault can be more obvious.
Keeping the pulse distribution module,, redistributing keeping pulse according to the display message that the display message module forms.Because when showing, possible certain or certain a little field will not show, like this, will reduce the addressing time, thereby increase and to hold time, corresponding, that can realize when showing total keep pulse number and will change, the maximum that need be able to realize is kept pulse number and is redistributed according to weight of each son field, and distribution principle is:
Wherein: S
iNumber after i the son field that shows for needs kept pulse and redistributed;
S
TFor after certain or certain a little field do not show, the maximum number of pulses that can realize;
L
iI sub weight for the needs demonstration.
Promptly Yi Shang distribution thinking is that the son situation that pulse shows according to actual needs of keeping that can realize is redistributed.Such as, demonstration situation for 11 son fields, weight is set to SF1: SF2: SF3: SF4: SF5: SF6: SF7: SF8: SF9: SF10: SF11=1: 2: 4: 8: 16: 32: 32: 40: 40: 40: 40, if these 11 a son pulse of keeping that whole demonstrations can realize are 1020, for each son field, keeping pulse number is S1: S2: S3: S4: S5: S6: S7: S8: S9: S10: S11=4: 8: 16: 32: 64: 128: 160: 160: 160: 160 so.In procedure for displaying, if what count on a son SF7 lights number of pixels less than corresponding threshold value, be that SF7 does not show, redistribute so that to keep pulse process as follows: SF1+SF2+SF3+SF4+SF5+SF6+S8+SF9+SF10+SF11=223, simultaneously owing to reduced the addressing time, the maximum that can realize is kept pulse number and is increased to 1115, so, 1115/223=5, so the pulse distribution of keeping of each son field is S1: S2: S3: S4: S5: S6: S8: S9: S10: S11=5: 10: 20: 40: 80: 160: 200: 200: 200: 200.For the grade gray scale is 100 pixel, resolves to 100=SF9+SF8+SF5+SF3=40+40+16+4, does not redistribute if do not carry out pulse, and keeping pulse number in fact now is S9+S8+S5+S3=160+160+64+16=400; If to after keeping pulse and redistributing, keeping pulse number in fact now is S9+S8+S5+S3=200+200+80+20=500, promptly redistribute according to actual displayed situation paired pulses of each son, can improve the brightness of image greatly.
Claims (4)
1. image processing method that improves AC PDP brightness of image, adopt sub-field type to realize that many grades gray scale of image shows, it is characterized in that, the display error addition of the raw data of present frame and the previous frame that sends from the frame error storer, its result is as the required gray-scale displayed grade of present frame, note is done gray shade scale to be shown, gray shade scale to be shown is through sub-field transformation module, original gray-scale data is transformed into the sub-field data of predefined sub-number of fields purpose, data after the conversion are sent to the frame data storer on the one hand, the sub-field data that all sub-places need when showing as present frame, on the other hand, data after the conversion are sent to the son field and light the pixels statistics module, light in the pixels statistics module at Zi Chang, the data of lighting of each son field are added up respectively, so, the pixel cell number of lighting with regard to the needs that obtain different sub-places correspondence, statistics is sent to display message forms module, form module in display message, number of pixels is lighted in each son field of statistics to be compared with predefined each son corresponding threshold value, if number of pixels is lighted less than predefined threshold value that should the child field in certain son field of statistics, so, just judge that this child field does not show, otherwise, then should show the child field, all son fields are compared with corresponding threshold value, obtain sub-field information to display, be which son field need show, which son field does not need to show that the display message that sub-field information formation module forms is sent to respectively keeps pulse distribution module and error formation module; In keeping the pulse distribution module, according to display message, paired pulses is redistributed, form module in error, according to display message with form the data presentation error of present frame together from the data that the frame data storer is brought, and the video data addition of storing frame error storer and next frame into is as the compensation to the present frame display error.
2. according to the said method of claim 1, it is characterized in that, light in the pixels statistics module in each son field, the step that the data of lighting of each son field are added up respectively is: for each son field is provided with a counter, data 0 or 1 to each son field are carried out addition, and the different sub-field data of a two field picture is carried out addition, and the result is the statistical information of different sons field, wherein 0 represent this child field to show that on behalf of this child field, 1 do not show.
3. according to the said method of claim 1, it is characterized in that the weight of group field was greater than 20% o'clock of the highest gray shade scale, threshold value is set to be not more than 1% of the plain number of whole screen image, the weight of group field was less than 5% o'clock of the highest gray shade scale, and threshold value is set to be not more than 5% of the plain number of whole screen image.
4. according to the said method of claim 1, it is characterized in that, said keep the pulse distribution module redistribute each the son keep pulse the time, distribution principle is:
Wherein: S
iFor needs show number after son is kept pulse and redistributed;
S
TFor after certain or certain a little field do not show, the maximum number of pulses that can realize;
L
iThe weight that shows the son field for needs.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1091120A (en) * | 1996-09-12 | 1998-04-10 | Fujitsu General Ltd | Error diffusion circuit for display device |
| JPH1152911A (en) * | 1997-08-07 | 1999-02-26 | Hitachi Ltd | Matrix panel display device |
| JP2001075530A (en) * | 1999-06-30 | 2001-03-23 | Fujitsu Ltd | Plasma display device |
| CN1409285A (en) * | 2001-09-25 | 2003-04-09 | 三星Sdi株式会社 | Device and method for displaying grey scale grade of plasma display screen |
| CN1444198A (en) * | 2002-03-12 | 2003-09-24 | 富士通日立等离子显示器股份有限公司 | Plasma display device |
| US6724356B1 (en) * | 1999-06-30 | 2004-04-20 | Fujitsu Limited | Plasma display unit |
| CN1670799A (en) * | 2005-04-18 | 2005-09-21 | 彩虹集团电子股份有限公司 | A processing method for improving AC PDP image quality |
-
2005
- 2005-10-14 CN CNB2005100961531A patent/CN100380421C/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1091120A (en) * | 1996-09-12 | 1998-04-10 | Fujitsu General Ltd | Error diffusion circuit for display device |
| JPH1152911A (en) * | 1997-08-07 | 1999-02-26 | Hitachi Ltd | Matrix panel display device |
| JP2001075530A (en) * | 1999-06-30 | 2001-03-23 | Fujitsu Ltd | Plasma display device |
| US6724356B1 (en) * | 1999-06-30 | 2004-04-20 | Fujitsu Limited | Plasma display unit |
| CN1409285A (en) * | 2001-09-25 | 2003-04-09 | 三星Sdi株式会社 | Device and method for displaying grey scale grade of plasma display screen |
| CN1444198A (en) * | 2002-03-12 | 2003-09-24 | 富士通日立等离子显示器股份有限公司 | Plasma display device |
| CN1670799A (en) * | 2005-04-18 | 2005-09-21 | 彩虹集团电子股份有限公司 | A processing method for improving AC PDP image quality |
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