CN1920918A - Plasma display device and image processing method thereof - Google Patents

Plasma display device and image processing method thereof Download PDF

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Publication number
CN1920918A
CN1920918A CNA200610159614XA CN200610159614A CN1920918A CN 1920918 A CN1920918 A CN 1920918A CN A200610159614X A CNA200610159614X A CN A200610159614XA CN 200610159614 A CN200610159614 A CN 200610159614A CN 1920918 A CN1920918 A CN 1920918A
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integer
gray level
mentioned
level value
plasma display
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CN100435196C (en
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金相元
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LG Electronics Nanjing Plasma Co Ltd
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LG Electronics Nanjing Plasma Co Ltd
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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
    • 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
    • G09G3/2007—Display of intermediate tones
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0673—Adjustment of display parameters for control of gamma adjustment, e.g. selecting another gamma curve

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Abstract

Disclosed is a plasma display device and image processing method thereof. The plasma display device includes a reverse gray scale corrector reversely correcting the gray scale of the video signal inputted exteriorly; an integer convertor converting the initial output grey value exceeding the integer into the above integer in the output grey value of the video signal including the integer and the decimal after the reverse gray scale correction. The image processing method includes the following stages: a reverse gray scale correction stage of reversely correcting the gray scale of the video signal inputted exteriorly; an integer transformation stage, wherein the initial output grey value exceeding the above integer is converted into the integer in the output grey value of the video signal including the integer and the decimal after the reverse gray scale correction. The invention can improve the definition of the plasma display device and eliminate the noise.

Description

Plasma display system and image processing method thereof
One, technical field
The invention relates to plasma display system and image processing method thereof, a kind of plasma display system and image processing method thereof that can reduce the noise that picture shows when driving plasma display system of saying so in more detail.
Two, background technology
In general, plasma display system (Plasma Display Apparatus) comprises that the next door that is formed between front panel and the rear panel forms the Plasmia indicating panel of a unit cell.In each unit, be filled with neon (Ne), helium (He) or charging and discharging gas as the mixed gas (Ne+He) of neon and helium and the inert gas that contains small amount of xenon.When relying on HF voltage to discharge, make inert gas send vacuum ultraviolet (Vacuum Ultravioletrays), thereby make the light-emitting phosphor that is formed between the next door come display frame.Such plasma display system structure is not only thin but also light, is the display device of future generation that gets most of the attention.
Fig. 1 is the synoptic diagram that shows the method for the image that has plasma display system now.
As shown in Figure 1, plasma display system is divided into the mutually different a plurality of subdomains of discharge time with an image frame phase, makes Plasmia indicating panel luminous in relative sub-regions phase of gray-scale value of the vision signal of input, thus display image.
Each subdomain is divided into initial period, the address period of selecting discharge cell that produces discharge equably and relies on discharge time to realize keeping the phase of gray scale.For example, in the time of be with 256 gray scale display images, the image frame phase (16.67ms) that just will be equivalent to 1/60 second is divided into 8 subdomains.Simultaneously, 8 subdomains are divided into initial period, address period again separately and keep the phase.Here, keep the phase in each subdomain with 2 nThe ratio of (n=0,1,2,3,4,5,6,7) increases.Like this, the phase of keeping changes in each subdomain, therefore can realize the gray scale (Gray level) of image.
Fig. 2 is the coordinate diagram of the light characteristic of comparison plasma display system and cathode-ray tube (CRT).
As shown in Figure 2, vision signal for input, cathode-ray tube (CRT) (Cathode-Ray Tube) and LCD (Liquid Crystal Display) thus the light that such display device shows with analog form control realizes the gray scale of wishing therefore having nonlinear light characteristic usually.Different therewith, the plasma display system utilization can open (on)/close (off) thus the quantity representing gradation of matrix array modified tone light pulse of discharge cell, therefore have linear light characteristic.The gray scale technique of expression of this plasma display system is called PWM (PulseWidth Modulation) method.
At this moment,, become 2.2 multiple proportionals, so the outer video signal of the such input of broadcast singal sends the signal that is equivalent to 2.2 multiplier wave bands owing to show electric current contrast light characteristic for the such display device of cathode-ray tube (CRT).Therefore, the plasma display system with linear luminance characteristic is necessary the vision signal of reverse gray correction from the outside input.
When reverse gray correction during from the vision signal of outside input, the reverse gray correction curve of generation relies on the subdomain mapping method and keeps pulse number and determine.
At first, the weighted value (weight) of subdomain mapping decision subdomain thereupon, is selected to minimize the mapping code of false figure noise (False Contour Noise) in subdomain mapping code.Following table 1 is by such method, utilizes an example of the subdomain mapping method of 10 subdomains that produce, 256 actual grey.Here, actual grey (Real Gray) is not gray-scale displayed by partly transferring such Flame Image Process, is that the combination intensity-weighted is worth mutually different subdomain and gray-scale displayed is called the standard grayscale of carrying out Flame Image Process.
Table 1
6FM 6F1 6F2 6F3 6F4 6F5 6F6 6F7 6F8 6F9 6F10 6FW
Weight 1 2 4 7 12 19 30 43 59 78 255
0 0 0 0 0 0 0 0 0 0 0 0
1 1 0 0 0 0 0 0 0 0 0 1
2 0 1 0 0 0 0 0 0 0 0 2
3 1 1 0 0 0 0 0 0 0 0 3
4 0 0 1 0 0 0 0 0 0 0 4
5 1 0 1 0 0 0 0 0 0 0 5
6 0 1 1 0 0 0 0 0 0 0 6
7 1 1 1 0 0 0 0 0 0 0 7
250 0 1 0 1 1 1 1 1 1 1 250
251 1 1 0 1 1 1 1 1 1 1 251
252 0 0 1 1 1 1 1 1 1 1 252
253 1 0 1 1 1 1 1 1 1 1 253
254 0 1 1 1 1 1 1 1 1 1 254
255 1 1 1 1 1 1 1 1 1 1 255
Below, be illustrated in fig. 3 shown below, keep pulse number and determine according to APL (the Average Picture Level) value that has in advance and the weighted value of subdomain.
Fig. 3 is the coordinate diagram of keeping the pulse number relation according to the APL value that existing plasma display system uses.
As shown in Figure 3, existing plasma display system has APL portion (not shown), thereby differently divides the weighted value of keeping pulse number that the orientation phase of keeping applies according to the APL value.
General plasma display system relies on to scan electrode and keeps the pulse of keeping that electrode alternately applies and makes the unit luminous, thereby shows from the vision signal of outside input.At this moment, because the pulse of keeping that applies is the high voltage that voltage swing reaches 180V to 220V, so electric quantity consumption is big.
In order to reduce electric quantity consumption, the number of during the APL value of existing plasma display system below 20%APL maximum being kept pulse is distributed in the phase of keeping,, reduce the number of keeping pulse that is distributed in the phase of keeping during the above APL value of 20%APL gradually.Thereupon, before the APL value below the 20%APL, the electric quantity consumption of plasma display system increases gradually, begins after the APL value more than 20%APL then, and the electric quantity consumption of plasma display system maintains certain level.
Like this, in order to realize best image quality, the number of keeping pulse that is distributed in each subdomain according to the APL value determines according to following mathematical expression 1.
Mathematical expression 1
(1 a-1)+(2 a-1)+(4 a-1)+(7 a-1)+(12 a-1)+(19 a-1)+(30 a-1)+(43 a-1)+(59 a-1)+(78 a-1)＝S total
Here, S TotalBe according to each APL value, the whole numbers of keeping pulse during the predefined image frame.Like this, according to (SF weighted value) with mathematical expression 1 aThe a value of computing is tried to achieve each subdomain as following table 2 and is kept pulse number.
Table 2
Title SF1 SF2 SF3 SF4 SF5 SF6 SF7 SF8 SF9 SF10 Add up to
SF Weight 1 2 4 7 12 19 30 43 59 78 255
APL0 0 2 5 13 27 50 94 153 234 340 918
APL31 0 1 3 6 11 18 29 43 59 78 248
In the table 2, the APL value is divided into 0 to 31 totally 32 rank, APL0 is that the APL value is minimum, and the summation of keeping pulse number is maximum.And APL31 is that the APL value is maximum, keeps the summation minimum of pulse number.
If determine above-mentioned subdomain mapping method and keep pulse number, just try to achieve the brightness value of the image of picture demonstration according to each subdomain mapping code.That is, measure the brightness value of relevant each actual grey value.The brightness value of utilize measuring is filled up gray-scale value between contiguous actual grey value with linear interpolation (Linear Interpolation).Thus, the brightness value by measuring as shown in Figure 4, can generate final reverse gray correction curve.
Fig. 4 is the brightness curve of performance according to the brightness value of the actual grey value of existing plasma display system, and the information of utilizing brightness curve, and performance is to the reverse gray correction curve of the output gray level value of the reverse gray correction of input gray level value.
As shown in Figure 4, for existing plasma display system, though the brightness value of big APL value (APL 31) increases linearly, when subdomain mapping code increased, the brightness offset took place in the brightness value of little APL value (APL 0) in the centre.
Its reason is: by keep the number of pulse according to mathematical expression 1 decision, for little APL value (APL 0), subdomain increases more, and keeping pulse number increases with geometric series more.Particularly, when subdomain uses number to increase in the subdomain mapping code, produce the part that the brightness offset takes place.This brightness offset is reflected on the image, has the problem that noise takes place.
In addition, the image for plasma display system shows that the use number of actual grey is used as important key element.That is, if the use number of actual grey is many, if the use number of actual grey is few, just there is the problem of partly transferring noise to increase in just a large amount of false figure noises that produce.At this moment, for the subdomain mapping code that uses identical actual grey number, according to reverse gray correction method, false figure noise and the occurrence degree difference of partly transferring noise.
Three, summary of the invention
In order to address the above problem, the purpose of this invention is to provide a kind of plasma display system and the image processing method thereof that can optimize the reverse gray correction of necessary property.And, provide a kind of and can reduce the false figure noise of picture demonstration and plasma display system and the image processing method thereof of partly transferring noise.
For realizing such technical task, comprise according to the plasma display system of one embodiment of the present of invention: oppositely gray correction is from the reverse gamma corrector of the input gray level value of the vision signal of outside input; After the above-mentioned reverse gray correction, in the output gray level value of the vision signal that comprises integer and decimal, will be the integer transformer of above-mentioned integer above the initial output gray level value transform of above-mentioned integer.
For whole input gray level values, above-mentioned integer transformer will surpass above-mentioned integer in above-mentioned output gray level value initial output gray level value transform is above-mentioned integer.
For a part of input gray level value, above-mentioned integer transformer will surpass above-mentioned integer in above-mentioned output gray level value initial output gray level value transform is above-mentioned integer.
Image processing method according to the plasma display system of one embodiment of the present of invention comprised with the next stage: oppositely gray correction is from the reverse gray correction stage of the input gray level value of the vision signal of outside input; After the above-mentioned reverse gray correction, in the output gray level value of the vision signal that comprises integer and decimal, will it above the initial output gray level value transform of above-mentioned integer the integer transform stage of above-mentioned integer.
In the above-mentioned integer transform stage, for whole above-mentioned input gray level values, the initial output gray level value transform that will surpass above-mentioned integer in above-mentioned output gray level value is above-mentioned integer.
In the above-mentioned integer transform stage, for the above-mentioned input gray level value of a part, the initial output gray level value transform that will surpass above-mentioned integer in above-mentioned output gray level value is above-mentioned integer.
The present invention shows to have the effect of the necessary reverse gray correction of optimization for the image of plasma display system.And, have the false figure noise that can reduce the picture demonstration and partly transfer anti noise.
Four, description of drawings
Fig. 1 is the synoptic diagram that shows the method for the image that has plasma display system now.
Fig. 2 is the coordinate diagram of the light characteristic of comparison plasma display system and cathode-ray tube (CRT).
Fig. 3 is the coordinate diagram of keeping the pulse number relation according to the APL value that existing plasma display system uses.
Fig. 4 is the coordinate diagram of the reverse gray correction curve of existing plasma display system.
Fig. 5 illustrates the block diagram according to the plasma display system of one embodiment of the invention.
Fig. 6 is the synoptic diagram according to reverse gray correction curve of the present invention.
Five, embodiment
Below, exhibition accompanying drawing is elaborated to desirable embodiment of the present invention.
Embodiment 1
Fig. 5 illustrates the block diagram according to the plasma display system of one embodiment of the invention.
As shown in Figure 5, the plasma display system according to one embodiment of the present of invention comprises: oppositely gamma corrector 510, gain controller 520, integer transformer 530, partly transfer device 540, subdomain mapper 550, data sorting device 560 and data driver 570.
When Plasmia indicating panel showed the vision signal of importing from the outside, for the input gray level value of vision signal, the input gray level value of reverse gamma corrector 510 reverse gray correction vision signals was so that the brightness value that shows has linear value.
Vision signal for the redness (Red) that relies on reverse gamma corrector 510 to proofread and correct, green (Green) and blue (Blue), gain controller 520 doubles the yield value that user (User) or assembling factory (Set maker) can adjust, thereby adjusts gain (gain) by red, green and blue.At this moment, rely on gain controller 520, the colour temperature that oneself is wished can be set in user or assembling factory.
Oppositely after the gray correction, in the output gray level value of the vision signal that comprises integer and decimal, integer transformer 530 will be an integer above the initial output gray level value transform of integer.Below to use the function that is mapped as this integer transformer 530 of example explanation of 255 actual grey.
At first, reverse gamma corrector 510 is with the reverse gray correction input gray level of the mode shown in the table 3 value, and output output gray level value.
(a) of table 3 is values of mathematical operation.As the actual algorithm use value, (b) be based on 1/128 unit, the value of the fraction part of the output gray level value that rounds up.
Table 3
The input gray level value The output gray level value
0 0
1 0.0034191
2 0.0068382
3 0.0102573
4 0.0136764
5 0.0170955
6 0.0205146
7 0.0239337
8 0.0273528
9 0.0307719
10 0.034191
The input gray level value The output gray level value
0 0
1 0
2 0.0078125
3 0.0078125
4 0.015625
5 0.015625
6 0.0234375
7 0.0234375
8 0.03125
9 0.03125
10 0.03125
Figure A20061015961400081
Figure A20061015961400082
656 45.9429067
657 45.9837078
658 46.2628894
659 46.700534
660 47.1398466
661 47.5827741
662 48.025395
663 48.4630396
664 48.9006843
665 49.18604
666 49.4266917
667 49.6673433
668 49.907995
669 50.2735892
670 50.7165167
671 51.1575424
672 51.595187
673 52.0768
674 53.042981
675 53.4806256
676 53.9182702
677 54.3602111
656 45.9453125
657 45.984375
658 46.265625
659 46.703125
660 47.140625
661 47.5859375
662 48.0234375
663 48.4609375
664 48.8984375
665 49.1875
666 49.4296875
667 49.6640625
668 49.90625
669 50.2734375
670 50.71875
671 51.15625
672 51.59375
673 52.078125
674 53.046875
675 53.484375
676 53.921875
677 54.359375
Figure A20061015961400083
Figure A20061015961400084
1012 237.0315209
1013 238.7936506
1014 241.1181429
1015 242.8792394
1016 243.5020885
1017 244.3142015
1018 246.4629242
1019 248.1209231
1020 249.1537393
1021 250.9144112
1022 253.2403612
1023 255
1012 237.03125
1013 238.796875
1014 241.1171875
1015 242.8828125
1016 243.5
1017 244.3125
1018 246.4609375
1019 248.1171875
1020 249.15625
1021 250.9140625
1022 253.2421875
1023 255
(a) (b)
Table 4 is to use the mapping code of the mapping of 255 actual grey.
For example, the output gray level value of relevant input gray level value 665 is 49.1875, and half between the mapping code of the additional and performance table 4 of this output gray level value No. 49 and No. 50 transferred regional.
Transfer the use zone in order to reduce this half, as shown in table 5, integer transformer 530 of the present invention is in comprising the output gray level value of integer and decimal, to be above-mentioned integer above the initial output gray level value transform of above-mentioned integer, thereby, partly transfer noise thereby reduce regional reduction of half accent of using in order to show fraction part.
Table 5 is integer transform modes of integer transformer 530 of the present invention.
In the content of table 5, for example, when the input gray level value is 660, because the output gray level value of prior art is 47.140625, though,, be to give up fraction part only to show the output gray level values with No. 47 according to the present invention so used half between mapping code No. 47 and No. 48 to transfer the zone.Therefore, the existing method that shows with table 5 (a) is different, for input gray level value 660, shows with the output gray level value that only has the actual grey value that table 5 (b) shows, do not use half to transfer regional representing gradation, thereby noise is partly transferred in reduction.
Fig. 6 is the synoptic diagram according to reverse gray correction curve of the present invention.
As shown in Figure 6, compare, do not have big difference according to reverse gray correction curve of the present invention with existing reverse gray correction curve.Therefore, in the advantage of existing reverse gray correction curves such as maintenance gray scale linearity, minimize half and transfer the use zone, thereby noise is partly transferred in reduction.
For whole input gray level values, integer transformer 530 will be an integer above the initial output gray level value transform of integer in comprising the output gray level value of integer and decimal.In this way, can minimize half and transfer regional use.
For a part of input gray level value, integer transformer 530 will be an integer above the initial output gray level value transform of integer in comprising the output gray level value of integer and decimal.In this way, in the zone that there is no need to minimize half accent zone, directly use existing reverse gray correction curve, be necessary that minimizing half transfers regional zone, will partly transfer noise and false figure noise to be reduced to proper level simultaneously thereby carry out integer transform as mentioned above.
At least more than one method in device 540 usefulness error diffusion or the shake of partly transferring is partly adjusted the vision signal of A/D converter 530 input.Partly transfer the vision signal of device 540 inputs to comprise the gradation data of forming by integer and decimal data.At this moment, the decimal data are reflected in integer data through more than half accent, and integer data is determined whether to be mapped in the subdomain mapping table of selection.Thus, determine whole gray-scale values of the vision signal of input, can guarantee gray level resolution and the gray scale expressive force of the image that shows simultaneously.
Subdomain mapper 550 will shine upon partly transfers the vision signal of device 540 inputs to be mapped in predefined subdomain mapping table.
Table 4
MAPPING No. SF1 SF2 SF3 SF4 SF5 SF6 SF7 SF8 SF9 SF10
SF Weight 1 2 4 7 12 19 30 43 59 78
0 0 0 0 0 0 0 0 0 0 0
1 1 0 0 0 0 0 0 0 0 0
2 0 1 0 0 0 0 0 0 0 0
3 1 1 0 0 0 0 0 0 0 0
4 0 0 1 0 0 0 0 0 0 0
5 1 0 1 0 0 0 0 0 0 0
6 0 1 1 0 0 0 0 0 0 0
7 1 0 1 0 0 0 0 0 0 0
8 1 0 0 1 0 0 0 0 0 0
9 0 1 0 1 0 0 0 0 0 0
10 1 1 0 1 0 0 0 0 0 0
11 0 0 1 1 0 0 0 0 0 0
12 1 0 1 1 0 0 0 0 0 0
13 0 1 1 1 0 0 0 0 0 0
14 1 1 1 1 0 0 0 0 0 0
44 0 1 1 1 1 1 0 0 0 0
45 1 1 1 1 1 1 0 0 0 0
46 0 0 1 0 1 0 1 0 0 0
47 1 0 1 0 1 0 1 0 0 0
48 0 1 1 0 1 0 1 0 0 0
49 1 1 1 0 1 0 1 0 0 0
50 1 0 0 1 1 0 1 0 0 0
51 0 1 0 1 1 0 1 0 0 0
52 1 1 0 1 1 0 1 0 0 0
53 0 0 1 1 1 0 1 0 0 0
54 1 0 1 1 1 0 1 0 0 0
55 0 1 1 1 1 0 1 0 0 0
56 1 1 1 1 1 0 1 0 0 0
57 1 0 0 1 0 1 1 0 0 0
247 0 1 1 0 1 1 1 1 1 1
248 1 1 1 0 1 1 1 1 1 1
249 1 0 0 1 1 1 1 1 1 1
250 0 1 0 1 1 1 1 1 1 1
251 1 1 0 1 1 1 1 1 1 1
252 0 0 1 1 1 1 1 1 1 1
253 1 0 1 1 1 1 1 1 1 1
254 0 1 1 1 1 1 1 1 1 1
255 1 1 1 1 1 1 1 1 1 1
Table 5
The input gray level value The output gray level value
0 0
1 0
2 0.0078125
3 0.0078125
4 0.015625
5 0.015625
6 0.0234375
7 0.0234375
8 0.03125
9 0.03125
10 0.03125
The input gray level value The output gray level value
0 0
1 0
2 0.0078125
3 0.0078125
4 0.015625
5 0.015625
6 0.0234375
7 0.0234375
8 0.03125
9 0.03125
10 0.03125
656 45.9453125
657 45.984375
658 46.265625
659 46.703125
660 47.140625
661 47.5859375
662 48.0234375
663 48.4609375
664 48.8984375
665 49.1875
666 49.4296875
667 49.6640625
668 49.90625
669 50.2734375
670 50.71875
671 51.15625
672 51.59375
673 52.078125
674 53.046875
675 53.484375
676 53.921875
677 54.859375
656 45.9453125
6S7 45.984375
658 46.265625
659 46.7103125
660 47
661 47.5859375
662 48
663 48.4609375
664 48.8984375
665 49
666 49.4296875
667 49.6640625
668 49.90625
669 50
670 50.71875
671 51
672 51.59375
673 52
674 53
675 53.484375
676 53.921875
677 54
Figure A20061015961400114
1012 237.03125
1013 238.796875
1014 241.1171875
1015 242.8828125
1016 243.5
1017 244.3125
1018 246.4609376
1019 248.1171875
1020 249.15625
1021 250.9140625
1022 253.2421875
1023 255
1012 237
1013 238
1014 241
1015 242
1016 243
1017 244
1018 246
1019 248
1020 249
1021 250
1022 253
1023 255
(a) existing method (b) method of the present invention
Data sorting device 560 with the carrying out of subdomain mapper 550 input the subdomain mapping (enum) data ordering of space ordering be the data of timeliness.
Data driver 570 receives the data that data sorting devices 560 have carried out time-sequencing, provides the addressing driving pulse to the addressing electrode (illustrate) of Plasmia indicating panel, thus the image of demonstration plasma display system.
As top detailed description the in detail, according to the present invention, the image demonstration for plasma display system has the effect of the reverse gray correction of the necessary property of optimization.And, have the false figure noise that can reduce the picture demonstration and partly transfer anti noise.
Image processing method for the foundation one embodiment of the invention, since be with describe in detail previously according to the identical principle of one embodiment of the invention plasma display system under carry out Flame Image Process, so use explanation to replace describing in detail to the plasma display system of foundation one embodiment of the invention.
As top detailed description the in detail, according to the present invention, the image demonstration for plasma display system has the effect of the necessary reverse gray correction of optimization.
And, have the false figure noise that can reduce the picture demonstration and partly transfer anti noise.
As mentioned above, in the scope that does not change the technology of the present invention thought and technical characterictic, the staff of the technical field of the invention can implement technology of the present invention with other concrete forms and constitute.
Therefore, embodiment recited above is exemplary in all respects, does not have limited.Patent claim of the present invention is set forth by claims, and all changes or the deformation form that are drawn by equal notion all belong to scope of the present invention.

Claims (6)

1, a kind of plasma display system is characterized in that: it comprises the reverse gamma corrector of reverse gray correction from the input gray level value of the vision signal of outside input; After the above-mentioned reverse gray correction, in the output gray level value of the vision signal that comprises integer and decimal, will be the integer transformer of above-mentioned integer above the initial output gray level value transform of above-mentioned integer.
2, plasma display system according to claim 1 is characterized in that: for whole input gray level values, above-mentioned integer transformer will surpass above-mentioned integer in above-mentioned output gray level value initial output gray level value transform is above-mentioned integer.
3, plasma display system according to claim 1 is characterized in that: for a part of input gray level value, above-mentioned integer transformer will surpass above-mentioned integer in above-mentioned output gray level value initial output gray level value transform is above-mentioned integer.
4, a kind of image processing method of plasma display system is characterized in that it comprised with the next stage:
Oppositely gray correction is from the reverse gray correction stage of the input gray level value of the vision signal of outside input;
After the above-mentioned reverse gray correction, in the output gray level value of the vision signal that comprises integer and decimal, will it above the initial output gray level value transform of above-mentioned integer the integer transform stage of above-mentioned integer.
5, the image processing method of plasma display system according to claim 4, it is characterized in that: in the above-mentioned integer transform stage, for whole above-mentioned input gray level values, the initial output gray level value transform that will surpass above-mentioned integer in above-mentioned output gray level value is above-mentioned integer.
6, the image processing method of plasma display system according to claim 4, it is characterized in that: in the above-mentioned integer transform stage, for the above-mentioned input gray level value of a part, the initial output gray level value transform that will surpass above-mentioned integer in above-mentioned output gray level value is above-mentioned integer.
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* Cited by examiner, † Cited by third party
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