CN100433097C - Image display method and system for plasma display panel - Google Patents
Image display method and system for plasma display panel Download PDFInfo
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- CN100433097C CN100433097C CNB2005101314596A CN200510131459A CN100433097C CN 100433097 C CN100433097 C CN 100433097C CN B2005101314596 A CNB2005101314596 A CN B2005101314596A CN 200510131459 A CN200510131459 A CN 200510131459A CN 100433097 C CN100433097 C CN 100433097C
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/28—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels
- G09G3/288—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels
- G09G3/296—Driving circuits for producing the waveforms applied to the driving electrodes
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/28—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels
- G09G3/288—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels
- G09G3/291—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels controlling the gas discharge to control a cell condition, e.g. by means of specific pulse shapes
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0247—Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes
Abstract
The present invention relates to an image display method and system for a plasma display panel (PDP), in which an image of each field displayed on the PDP corresponding to input image signals is divided into sub-fields of different weights, the sub-fields being divided into two continuous sub-field groups and a weighting value of the sub-field groups being different, and in which the weighting values of the sub-fields are combined to display grays. The method includes generating original grays; determining a diffusion filter value; generating final grays by applying the diffusion filter value to the original grays; generating gray data corresponding to the final grays, the gray data being distributed over the two sub-field groups; and displaying an image on the PDP according to the gray data. The disclosed method and system reduce flicker and contour noise and other display problems associated with the display of 50 Hz Phase Alternating by Line image signals.
Description
Present patent application is dividing an application of following patented claim:
Application number: 02131851.4
The applying date: on September 6th, 2002
Denomination of invention: the method for displaying image and the system that are used for plasma display panel
Technical field
The present invention relates to be used for the method for displaying image and the system of plasma display panel, the present invention relates to reduce method for displaying image that is used for plasma display panel and system in flicker, profile noise, interference pattern and other such problem when importing 50 Hz phase alternating by line image signals and realize image.
Background technology
Plasma display panel (PDP) is a kind of display device, has wherein arranged a plurality of discharge cells in a matrix, and this discharge cell is optionally illuminated with the view data of reduction as the electric signal input.
In such PDP, essential can display gray scale to show the performance of color display apparatus.For reaching these, used wherein single field to be divided into a plurality of sons and should the child field be gray scale implementation method by time shared processing control.
The deviser of such display device main what pay close attention to is its flicker.How perceptual image is closely related with human eye in flicker.Usually, but do greatly more and the flicker perception more that becomes when display frequency is low more when screen size.Image is to use in the situation that line-by-line inversion (PAL) picture signal realizes in PDP therein, and these two kinds of factors all present so that produced obvious a large amount of flicker.
Thereby, if PDP is to arrange as the minimum increase of a son use of arranging of typical case's use in PDP or to use minimum 50 hertz the vertical frequency that reduces arrangement to drive, then to produce a large amount of flickers.
Causing in the middle of the more insoluble factor of flicker, because can not change the size of screen, so must reduce flicker by changing frequency.Korea S's publication has disclosed a kind of method by the minimizing flicker of adjusting frequency for 2000-16955 number.In that piece of writing is open, has giant-screen and by importing the flicker among the PDP that 50 hertz of picture signals operate in order to reduce, son field in single is divided into two groups (G1 and G2), and it is identical that the weight of the son field in every group is arranged, and perhaps arranges except all son fields of LSB (least significant bit (LSB)) field to have identical structure.Also have, the disclosed feature of that piece is that the luminance weights value in two sons group is equal to distribution.Utilizing this method minimizing to glimmer for sub arrangement of tradition that minimum increases arrangement or minimum minimizing arrangement is great improvement.
Figure 12 is sub synoptic diagram of arranging of tradition, and Figure 13 shows the synoptic diagram of the example of bright (On)/(Off) control of going out of each the son field in producing the gray scale of glimmering in the situation of having used traditional sub arrangement to realize gray scale therein.Shown in this accompanying drawing,, in group G1, show 53 grades of gray scales and in group G2, show 56 grades of gray scales in order to realize the demonstration of 109 grades of gray scales.
SF1 to SF5 is bright at group G1 neutron field; And at group G2 neutron field SF3, SF4 and SF6 is bright.Correspondingly, in the situation of a superincumbent son SF6, bright line number is zero in group G1 because wired going out; And bright line number is 4 in group G2, and the weight difference because all lines are bright (that is the difference on bright line number) is 4.Because this greatest differences so ZhaoMing Center's shaft position of every group (G1 and G2) is different, causes producing flicker.Although in this example, only described four lines, have in the situation of identical gray scale at more line, for example, 480 lines of in the screen of 480 * 640 sizes all have in the situation of identical gray scale therein, bright line number difference mutation is 480, makes the user see quite a large amount of flickers.
The gray scale that exists in the neighborhood pixels in the image shown on the screen is identical many examples.Correspondingly, if be presented at the image that has same grayscale on many lines, then the result as the son weight difference between an aforesaid son group (G1 and G2) produces the visible flicker of human eye.
In the prior art by in every group (G1 and G2), distributing luminance weights to come display gray scale can not reduce flicker in all gray scales in picture signal.That is, when display gray scale, be different if distribute to the highest weighting of son field of highest weighting and the display gray scale of distributing to G2 of son of the display gray scale of G1, then in two groups, occur in the difference on ZhaoMing Center's shaft position.The result produces flicker.
Summary of the invention
An object of the present invention is to provide method for displaying image and the system of a kind of PDP of being used for, its neutron
The field is to use the diffusion filter diffusion that utilizes human vision property, makes that flicker and profile noise are reduced.
Another object of the present invention provides method for displaying image and the system of a kind of PDP of being used for, wherein uses the prime number diffusion filter to prevent to produce interference pattern by utilizing diffusion filter and error diffusion to handle simultaneously.
In first example relevant with this method, the invention provides the method for displaying image of a kind of PDP of being used for, the every field picture corresponding to 50 hertz of received image signals that wherein shows in PDP is divided into a plurality of sons field of different weights, this child field is divided into two son groups continuously again, and the weighted value of a son group is different, and the weighted value of its neutron field is merged with display gray scale, and described method comprises: produce initial gray scale based on received image signal; Picture signal based on input is determined the diffusion filter value; On the initial gray scale that is produced, produce final gray scale by applying this diffusion filter value; Generation is corresponding to the gradation data of the final gray scale of produce, and this gradation data is to cross over two sons component cloth; And according to the gradation data that is produced display image on plasma display panel.
According to the feature of first embodiment of the invention, differently set up the diffusion filter value for the idol field and the strange field of received image signal.
Another feature of first example according to the present invention, the diffusion filter value of foundation idol field and the diffusion filter value of strange field are to compensate mutually about specific pixel.
In first example relevant with this system, the invention provides the image display system of a kind of PDP of being used for, the every field picture corresponding to 50 hertz of received image signals that wherein shows in PDP is divided into a plurality of sons field of different weights, this child field is divided into two son groups continuously again, and the weighted value of a son group is different, and the weighted value of its neutron field is merged with display gray scale, and described system comprises: image-signal processor, and the digitizing received image signal is to produce Digital Image Data; The sub-field code unit, apply the diffusion filter value determined based on received image signal to based on the initial gray scale that produces by the Digital Image Data that image-signal processor produced, to produce final gray scale thus, and produce the gradation data corresponding to this final gray scale, this gradation data is to cross over two sons component cloth; And the address assignment unit, carry out the feasible image of control and be shown on the PDP corresponding to the gradation data of exporting by the sub-field code unit.
In second example relevant with this method, the invention provides the method for displaying image of a kind of PDP of being used for, the every field picture corresponding to 50 hertz of received image signals that wherein shows in PDP is divided into a plurality of sons field of different weights, this child field is divided into two son groups continuously again, and the weighted value of a son group is different, and the weighted value of its neutron field is merged with display gray scale, and described method comprises: have the original data of the prime number diffusion filter conversion of prime number (prime number) diffusion filter coefficient corresponding to picture signal by utilization; Carry out error diffusion processing generation final image data by partly regarding the gradation data of received image signal as error and on the original data of being changed, spreading this error with corresponding each neighbor; And the feasible image corresponding to generation final image data of execution control is shown on the PDP.
The feature of second example according to the present invention, prime number diffusion filter coefficient are the coefficient of prime number numeral or the coefficient that is obtained by merging one a prime number numeral and a real number.
Another feature of second example according to the present invention, the prime number diffusion filter coefficient that is had by the prime number diffusion filter is to be realized by the figure signal that has opposite characteristic on horizontal direction relevant with this pixel and vertical direction.
Another feature of second example according to the present invention, the prime number diffusion filter coefficient that is had by the prime number diffusion filter is to be realized by the stripe signal that has opposite characteristic on the time orientation relevant with this pixel, and wherein time orientation is by a plurality of frame appointments, and the prime number diffusion filter coefficient that is had by each the prime number diffusion filter that is applied on each frame has the opposite characteristic relevant with consecutive frame.
In three example relevant with this method, the invention provides the method for displaying image of a kind of PDP of being used for, the every field picture corresponding to 50 hertz of received image signals that wherein shows in PDP is divided into a plurality of sons field of different weights, this child field is divided into two son groups continuously again, and the weighted value of a son group is different, and the weighted value of its neutron field is merged with display gray scale, and described method comprises: have the original data of the first prime number diffusion filter conversion of the first prime number diffusion filter coefficient corresponding to picture signal by utilization; By the gradation data of view data is partly regarded as error and diffusion corresponding to this error of the scheduled volume of each neighborhood pixels to neighbor, with execution error diffusion processing on change original data; Conversion has stood the view data that this error diffusion is handled, and producing the final image data, the second prime number diffusion filter that has second a prime number diffusion filter coefficient by utilization is carried out the conversion that has stood the view data that described error diffusion handles; And the feasible image corresponding to generation final image data of execution control is shown on the PDP.
The feature of the 3rd preferred embodiment according to the present invention, the first prime number diffusion filter apply the first prime number diffusion filter coefficient to the input image data corresponding to low gray area.
Another feature of the 3rd preferred embodiment according to the present invention, the first prime number diffusion filter coefficient are the coefficient of prime number numeral or the coefficient that is obtained by merging one a prime number numeral and a real number.
The another feature of the 3rd preferred embodiment according to the present invention, the second prime number diffusion filter apply the second prime number diffusion filter coefficient to the input image data corresponding to the zone that expands to high gray area from middle gray area.
Another feature of the 3rd preferred embodiment according to the present invention, the second prime number diffusion filter coefficient are prime number coefficients or by a real number coefficient.
In second example relevant with this system, the invention provides the image display system of a kind of PDP of being used for, the every field picture corresponding to 50 hertz of received image signals that wherein shows in PDP is divided into a plurality of sons field of different weights, this child field is divided into two son groups continuously again, and the weighted value of a son group is different, and the weighted value of its neutron field is merged with display gray scale, described system comprises: image-signal processor, by the digitizing received image signal to produce Digital Image Data; Prime number diffusion filter processor is changed this Digital Image Data by utilizing by the appointment prime number diffusion filter coefficient on the Digital Image Data of described image-signal processor output, then exports the result of this processing; The error diffusion unit is carried out error diffusion corresponding to this error of the scheduled volume of each neighborhood pixels and is handled and produce the final image data by the gradation data of view data partly being regarded as error and diffusion on the original data of being changed to neighbor; Memory Controller produces the sub-field data corresponding to the final image data that produced by described error diffusion unit, and applies this sub-field data to PDP; And keep (sustain)/scanning impulse driver controller, generation is corresponding to a son arrangement architecture of the final image data that produced by described error diffusion unit, produce control signal based on a son arrangement architecture that is produced, and apply this control signal to PDP.
In three example relevant with this system, the invention provides the image display system of a kind of PDP of being used for, the every field picture corresponding to 50 hertz of received image signals that wherein shows in PDP is divided into a plurality of sons field of different weights, this child field is divided into two son groups continuously again, and the weighted value of a son group is different, and the weighted value of its neutron field is merged with display gray scale, described system comprises: image-signal processor, by the digitizing received image signal to produce Digital Image Data; The first prime number diffusion filter processor is changed this Digital Image Data by utilizing by the appointment first prime number diffusion filter coefficient on the Digital Image Data of described image-signal processor output, then exports the result of this processing; The error diffusion unit produces the final image data by the gradation data of view data being regarded partly as error and diffusion are handled to neighbor and in the view data execution error diffusion of exporting from described prime number diffusion filter processor corresponding to this error of the scheduled volume of each neighborhood pixels; The second prime number diffusion filter processor is changed this view data by the appointment second prime number diffusion filter coefficient that utilization stands on the view data that the error diffusion of described error diffusion unit handles, then the final image data that obtain of output; Memory Controller produces the sub-field data corresponding to the final image data that produced by the described second prime number diffusion filter processor, and applies this sub-field data to PDP; And keep/the scanning impulse driver controller, generation is corresponding to a son arrangement architecture of the final image data that produced by the described second prime number diffusion filter processor, produce control signal based on a son arrangement architecture that is produced, and apply this control signal to PDP.
Description of drawings
Will in conjunction with comprehensive this and as the accompanying drawing of the ingredient of this instructions and describe example of the present invention is described, explain principle of the present invention, wherein:
Fig. 1 is the synoptic diagram according to a kind of method for displaying image that is used for PDP of first preferred embodiment of the present invention;
Fig. 2 A and 2B show the example of the diffusion filter of Fig. 1, and wherein Fig. 2 A shows an idol diffusion filter, and Fig. 2 B shows strange diffusion filter;
Fig. 3 A and 3B show owing to applied the diffusion filter of Fig. 2 A and 2B each the son field relevant with gradation data bright/state goes out, wherein Fig. 3 A shows bright/state that goes out of each son that applies idol diffusion filter, and Fig. 3 B show each son of applying strange diffusion filter bright/state goes out;
Fig. 4 is the block scheme according to a kind of image display system that is used for PDP of first preferred embodiment of the present invention;
Fig. 5 is the more detailed block diagram of the sub-field code unit of Fig. 4;
Fig. 6 illustrates the curve map how the diffusion filter coefficient value changes according to the conversion on a kind of image display system gray scale that is used for PDP of first preferred embodiment of the present invention;
Fig. 7 A and 7B illustrate to be used at the synoptic diagram of use according to two examples of the view data conversion of the image demonstration of the PDP of the use prime number diffusion filter of preferred embodiment of the present invention;
Fig. 8 is the figure of example that the prime number diffusion filter of Fig. 7 is shown;
Fig. 9 is the figure of example of each frame that the prime number diffusion filter of Fig. 7 is shown;
Figure 10 is the block scheme according to a kind of image display system that is used for PDP of second preferred embodiment of the present invention;
Figure 11 is the block scheme according to a kind of image display system that is used for PDP of the 3rd preferred embodiment of the present invention;
Figure 12 is a tradition synoptic diagram of arranging; And
Figure 13 is the synoptic diagram that is illustrated in the example of the bright/control of going out of each the son field in the gray scale that produces flicker in the situation of wherein using the arrangement of tradition to realize gray scale.
Embodiment
Describe preferred embodiment of the present invention in detail referring now to accompanying drawing.
Fig. 1 is the synoptic diagram according to a kind of method for displaying image that is used for PDP of first preferred embodiment of the present invention.
Referring to Fig. 1, as a kind of method that visually spreads the gray scale flicker that is produced, a kind of method for displaying image that is used for PDP according to first preferred embodiment of the present invention applies diffusion filter at the initial gradation data of being determined by external image signal, to produce final gradation data.This diffusion filter comprises an idol diffusion filter 10 that is applied on idol the gradation data and is applied to strange diffusion filter 20 on strange the gradation data.
Preferably, execution is changed via the gradation data conversion of an idol diffusion filter 10 with via the gradation data of strange diffusion filter 20, makes signal Processing to carry out on the reverse direction relevant with specific pixel.For example, if idol diffusion filter 10 is by adding the conversion that certain filter value n carries out gradation data to the gradation data of the idol relevant with a specific pixel, a then strange diffusion filter 20 is by deducting the conversion that certain filter value n carries out gradation data from strange the gradation data relevant with this specific pixel, with the signal Processing of compensation via an idol diffusion filter 10.
Fig. 2 A and 2B show the example of the diffusion filter of Fig. 1, and wherein Fig. 2 A shows an idol diffusion filter 10, and Fig. 2 B shows strange diffusion filter 20.
As shown in drawings, an idol diffusion filter 10 and a strange diffusion filter 20 add 0 ,+k or-one of k to initial gradation data with this initial gradation data of conversion.To also have, to compensate mutually in order making via an idol diffusion filter 10 and the gradation data of a strange diffusion filter 20 about the specific pixel conversion, the value of idol field diffusion filter 10 and the value of a strange diffusion filter 20 add 0 to.
As mentioned above, an idol diffusion filter 10 and a strange diffusion filter 20 adopt 0 ,+k or-one of the value of k.In first preferred embodiment of the present invention, for the convenient supposition+k that explains equal 1 and-k equals-1.Thus, an idol diffusion filter 10 and a strange diffusion filter 20 adopt 0 ,+one of 1 or-1 value.
Fig. 3 A and 3B show by with the idol that has applied Fig. 2 A and 2B and a strange diffusion filter 10 and 20 to the gradation data that produces flicker as shown in figure 13 and relevant each the son field of the gradation data that draws bright/state goes out.Wherein Fig. 3 A shows bright/state that goes out of each son that applies idol diffusion filter 10, and Fig. 3 B show each son of applying strange diffusion filter 20 bright/state goes out.
Shown in Fig. 3 A and 3B, utilizing feasible group G1 and G2 between the difference of bright number relevant with a son SF6 of result of an even diffusion filter 10 and the initial gradation data of a strange diffusion filter 20 conversions is 2, and this difference surpasses all even and strange.This is tangible minimizing with respect to prior art, and the indication especially in the above the son weight difference on minimizing.Correspondingly, by using an idol field and a strange diffusion filter 10 and 20 to reduce flicker according to first preferred embodiment of the present invention.
Fig. 4 is the block scheme according to a kind of image display system that is used for PDP of first preferred embodiment of the present invention.
This image display system comprises image-signal processor 100, baseband signal generator 200, gamma (gamma) correction and error diffusion unit 300, sub-field code unit 400 and address assignment unit 500.Numbering 600 indication plasma display panels.50 hertz of PAL (line-by-line inversion) picture signal digitizing that image-signal processor 100 receives the outside is to produce RGB (red green blue value of color) data.
Gamma correction and error diffusion unit 300 receive from the RGB data of described image-signal processor 100 outputs, proofread and correct the characteristic of corresponding PDP 600 to carry out gamma value, and carry out the DIFFUSION TREATMENT of the display error relevant with neighboring pixel simultaneously.The result of these processing is then exported in this Gamma correction and error diffusion unit 300.
About these gradation datas, the son field in a field is divided into two group G1 and G2, and the weight of the son of each group is arranged and is identical or arranges except all sons of LSB (least significant bit (LSB)) and to have identical structure.Perhaps, the luminance weights value in two sons group is equal to distribution.
Fig. 5 is the more detailed block diagram of the sub-field code unit 400 of Fig. 4.
As shown in the drawing, sub-field code unit 400 comprises initial gray-scale generator 410, tracing table 420, reference signal generator 430 and diffusion filter applying unit 440.Initial gray-scale generator 410 receives the rgb pixel value from Gamma correction and error diffusion unit 300, and produces corresponding initial gray scale.
Diffusion filter applying unit 440 applies the diffusion filter value determined according to the state of the reference signal that is produced by reference signal generator 430 on the initial gray scale that is produced by initial gray-scale generator 410, to produce final gray scale thus.Diffusion filter applying unit 440 is the gradation data by producing corresponding to these final gray scales with reference to described tracing table 420 then, and after this these diffusion filter applying unit 440 these gradation datas of output are to address assignment unit 500.
For example, if initial gray-scale generator 410 produces 109 grades of initial gray scales, then be chosen in one of filter value between the diffusion filter value of Fig. 2 A and 2B, and it is added on this initial gray scale according to the state of the reference signal that produces by reference signal generator 430.If selected idol the diffusion filter 10 of Fig. 2 A, if select then that present second row first lists+the diffusion field value of the idol diffusion filter 10 of k, then+k is added on 109 grades of gray scales, make that the final gray scale of 109+k level is determined.If k is 1, then draw 110 grades of final gray scales altogether, after this, produce with reference to described tracing table 420 corresponding to the gradation data of 110 grades of final gray scales.
Correspondingly, address assignment unit 500 receives gradation data according to the final gray scale by the diffusion filter diffusion, and wherein this gradation data is different from the gradation data of initial gray scale, and carries out the operation control of PDP 600.As a result, realized wherein reducing the image of flicker.
As mentioned above, be chosen in 0 ,+k or-go to carry out the conversion of the initial gray scale in first preferred embodiment of the present invention through one of filter value of diffusion between the k.Yet, might from possible diffusion filter value, ignore 0 in case only+k and-carry out selection between the k as the diffusion filter value.Also have, 0 ,+k or-order of k diffusion filter value can be different from as at the order as shown in Fig. 2 A and the 2B.
In addition, though diffusion filter is on all pixels that are applied among the PDP in the above description, the present invention is not limited to this operation, and might only apply diffusion filter on those pixels of using traditional technique in measuring in the zone of flicker or profile noise.Yet one of ordinary skill in the art can easily be understood such operation with reference to first preferred embodiment of the present invention and not need to provide the detailed description of this operation.
At last, though will be assumed to 1 as the k value of the coefficient of each diffusion filter in the description of first preferred embodiment of the present invention, this k value can change with each predetermined input gray level level.
Shown in the curve map of Fig. 6, gamma value depends on the grey level and difference.That is, the gamma curve of this curve map shows from high gray area and reduces to low gray area gamma value, and indication is along with becoming more responsive near low gray area vision.As a result, applying different diffusion filter values according to this grey level makes or prevents or reduce anamorphose according to this grey level.
Therein altogether in 256 grades of grey levels' the situation, specify the diffusion filter coefficient k to make for the grey level less than 100 o'clock k≤1, for the grey level more than or equal to 100 or less than 200 o'clock k≤2, and for the grey level more than or equal to 200 o'clock k≤3 or k＞3.Depend on the grey level and different diffusion filter values by utilization, promptly, be applied to more sensitive low gray area of vision and middle gray district by the diffusion filter value that will have, reduced scalloping according to this grey level less than the coefficient of the more insensitive high gray area of vision.
Utilize PDP to show in the situation of multi-stage grey scale therein, so because this display device fully display gray scale might on picture quality, suffer deterioration.Use a kind of error diffusion method, wherein increased the progression of the gray scale that is subjected to physical constraint restriction like this by the method for utilizing the space average gray scale between neighbor.Such processing is to carry out by the Gamma correction of first preferred embodiment of the present invention and error diffusion unit 300 (see figure 4)s.
Yet, drive PDP simultaneously if be used for reducing as mentioned above the diffusion filter and the error diffusion method of profile noise, then the conventional diffusion wave filter uses integer diffusion filter coefficient to go to carry out the conversion of signals relevant with vertical direction with the level of display pixel.As a result, changing the picture element data therein stands via diffusion filter to produce interference pattern at specific gray scale place in the situation of error diffusion processing.This interference pattern is especially insoluble at low gray area.That is, handle if carry out diffusion filter on low gray area, the picture element data-switching value of the low gray area that then obtains has the influence of increase to this low gray area, because this diffusion filter coefficient is an integer.When the error diffusion processing appears carrying out in the influence of following this increase, produce interference pattern at specific gray scale place.
In order to address this problem, in the of the present invention second and the 3rd preferred embodiment that will be described with reference to the drawings, used the prime number diffusion filter.
Fig. 7 A and 7B illustrate to be used at the synoptic diagram of use according to two examples of the view data conversion of the image demonstration of the PDP of the use prime number diffusion filter of preferred embodiment of the present invention.
At first referring to Fig. 7 A, be to handle 40 and produce the final image data on the original data and carry out corresponding to 50 hertz of PAL-system picture signals by applying prime number diffusion filter 30 and error diffusion according to the view data conversion that is used for PDP of preferred embodiment of the present invention.
Prime number diffusion filter 30 utilizes prime number (numeral) diffusion filter coefficient or wherein the coefficient of a prime number (numeral) diffusion filter coefficient and the combination of a real number (numeral) diffusion filter coefficient is carried out the prime number diffusion filter and handled on original data, the gradation data that prime number diffusion filter 30 outputs after this obtain.Handle in 40 in error diffusion, will be applied to from the error of pixel diffusion formerly and reception on the view data of prime number diffusion filter 30 outputs and (stand therein after the processing of prime number diffusion filter), to produce the final image data thus.
Prime number diffusion filter 30 might only use real number diffusion filter coefficient (rather than only prime number diffusion filter coefficient).Yet view data is by the conversion of the real number diffusion filter coefficient in prime number diffusion filter 30 and then stands in the situation of error diffusion processing 40 therein, and the place may produce abnormal graph in specific gray scale.That is,, also can as in the prior art, produce abnormal graph even realized minimizing profile anti noise.Thus, not only to utilize real number diffusion filter coefficient, but preferably use or prime number diffusion filter coefficient or merge the coefficient of prime number diffusion filter coefficient and a real number diffusion filter coefficient only, carry out the diffusion filter processing.
Referring to Fig. 7 B, in prime number diffusion filter 50, stand diffusion filter corresponding to the data of the low gray area in original data and handle, and in dispersive filter 70, stand diffusion filter corresponding to the centre to the data of high gray area and handle.Handle in 60 in error diffusion, will be applied on the view data of prime number diffusion filter 50 outputs (stood therein prime number diffusion filter handle after) from diffusion the pixel formerly and the error that receives, to produce the final image data thus.
Prime number diffusion filter 50 utilizes prime number diffusion filter coefficient or wherein merges prime number diffusion filter coefficient and the coefficient of a real number diffusion filter coefficient comes that the data of low gray area are carried out the prime number diffusion filter and handles.On the other hand.The prime number diffusion filter 70 of second example utilizes prime number diffusion filter coefficient or real number diffusion filter coefficient to come that the data on from the centre to high gray area are carried out the prime number diffusion filter and handles.Although prime number diffusion filter 70 can also utilize the coefficient that wherein merges a prime number diffusion filter coefficient and a real number diffusion filter coefficient, because should be little to the influence of high gray area diffusion filter coefficient, so only utilize real number diffusion filter coefficient just can reduce the profile noise and not produce abnormal graph from middle gray scale.
Also have, and though above two examples having described by utilizing prime number diffusion filter carries out image data-switching and execution error diffusion to handle, the invention is not restricted to this two examples, and the view data conversion can various mode be carried out.For example, in Fig. 7 A, might before prime number diffusion filter 30 is carried out processing, carry out error diffusion and handle 40.That is, prime number diffusion filter 30 might be carried out the processing of prime number diffusion filter on the data that stand error diffusion processing 40.Also have, in Fig. 7 B, prime number diffusion filter 50 can be carried out the prime number diffusion filter relevant with high gray area with the middle gray district respectively and handle.
Fig. 8 is the figure of example that the prime number diffusion filter of Fig. 7 A and 7B is shown.
As shown in Figure 8, the prime number diffusion filter on each row's horizontal direction to original data add have such as+A and-B and-D and+the prime number diffusion filter coefficient of the opposite characteristic of C, on the vertical direction of each row, add have such as+A and-D and-B and+the prime number diffusion filter coefficient of the opposite characteristic of C, to change original data thus.Each coefficient+A ,-B ,+C and-D can adopt prime number numeral and real number digital value as shown in the following Table 1.
Referring to Fig. 9, in preferred embodiment of the present invention, prime number diffusion filter 80,82,84 and 86 is to apply according to time orientation (that is frame direction).Along with applying of prime number diffusion filter 80,82,84 and 86, described coefficient does not have the opposite characteristic relevant with frame direction.
In more detail, at a particular frame for example in the first vertical synchronization frame (1V), applied on each row's horizontal direction use+A and-B and-D and+the prime number diffusion filter 80 of the diffusion filter coefficient of C, and at subsequent frame promptly in the second vertical synchronization frame (2V), applied on each row's horizontal direction uses+D and-A and-the prime number diffusion filter 82 of the diffusion filter coefficient of C and+B.At another subsequent frame promptly in the 3rd vertical synchronization frame (3V), applied on each row's horizontal direction uses+C and-D and-the prime number diffusion filter 84 of the diffusion filter coefficient of B and+A.At another subsequent frame promptly in the 4th vertical synchronization frame (4V), applied on each row's horizontal direction uses+B and-C and-the prime number diffusion filter 86 of the diffusion filter coefficient of A and+D.
The example of table 1. prime number diffusion filter value
| Prime number diffusion filter coefficient | The numeric type of value | Example |
| +A | Prime number or real number | 0.5 |
| -B | Prime number or real number | -0.75 |
| +C | Prime number or real number | 1.25 |
| -D | Prime number or real number | -1 |
Along with repeating alternately to apply four prime number diffusion filters 80,82,84 and 86, the discontinuous signal level is also with to be that neighbor is relevant on the time direction at frame direction show, and the initialize signal level is realized with mean value.As a result, the profile noise that produces at smoothed image continuity point place also scatters on time orientation.
More than, although described as the coefficient that does not have the opposite characteristic relevant with frame direction, yet the invention is not restricted in this respect, and this coefficient might have so on frame direction, and opposite coefficient makes average level become the signal level of original data.For example, if the coefficient of prime number diffusion filter 82 is applying after changing from+D to-D, from-A to+A, from+B to-B and from-C to+C, then the coefficient of prime number diffusion filter 82 on frame direction, have with frame formerly in the opposite characteristic of coefficient of wave filter (that is, the prime number diffusion filter 80).
Also have, although described above be 2 rows * 2 row prime number diffusion filters, yet the invention is not restricted to this structure, and might use the prime number diffusion filter of various sizes.For example, might use the prime number diffusion filter of 4 rows * 4 row.
In addition, described above is that wherein four frames are 2 rows * 2 row prime number diffusion filters that repeat to apply on time orientation.Yet, the invention is not restricted in this respect, and might repeat to take place the frame of lesser amt.Also have, use therein in the situation of prime number diffusion filter of different row and column structures, might utilize more than four frames.For example, if use 3 rows * 3 row prime number diffusion filters, during time orientation is to apply this prime number diffusion filter on the frame direction, can carries out and apply by repeating 8 to 9 frames.
At last, if the type of described coefficient and reverse direction characteristic are to be determined by the row and column structure of this prime number diffusion filter, then this prime number diffusion filter+A ,-B ,+C and-the D coefficient can change in every way.
Figure 10 is according to the block scheme of a kind of image display system that is used for PDP of second preferred embodiment of the present invention.
As shown in figure 10, a kind of image display system that is used for PDP according to second preferred embodiment of the present invention comprises: image-signal processor 1100, prime number diffusion filter processor 1200, error diffusion unit 1300, Memory Controller 1400, address driver 1500, keep/scanning impulse driver controller 1600 and keeping/scanning impulse driver 1700.Numbering 1800 indication PDP.50 hertz of PAL-system picture signals that image-signal processor 1100 digitizings receive from the outside, to produce rgb image data, after this this image-signal processor 1100 is exported these rgb image datas.Image-signal processor 1100 is also carried out the characteristic of the Gamma correction processing relevant with gamma value with corresponding PDP 1800.
The prime number diffusion filter that prime number diffusion filter processor 1200 applies as shown in Figure 8 arrives from the rgb image data of image-signal processor 1100 outputs, these data are converted to the view data of special pattern, then exports this translation data.Can use prime number diffusion filter coefficient or wherein merged prime number diffusion filter coefficient and the coefficient of real number diffusion filter coefficient as the coefficient of this prime number diffusion filter.Also have, it is not prime number diffusion filter in the structure shown in Fig. 8 that one of ordinary skill in the art can easily be predicted use.
Keep/scanning impulse driver controller 1600 produces corresponding to the son arrangement architecture by the rgb image data of error diffusion unit 1300 outputs, and produces control signal based on a son arrangement architecture that is produced.Keep/scanning impulse driver controller 1600 then exports this control signal to keeping/scanning impulse driver 1700.This keeps/scanning impulse driver 1700 according to by keep/control signal of scanning impulse driver controller 1600 outputs produces and keeps pulse and scanning impulse, then will keep respectively pulse and scanning impulse be applied to PDP 1800 keep electrode (X1, X2 ... Xn) and scan electrode (Y1, Y2 ... Yn).
At the image display system that is used for PDP according to second preferred embodiment of the present invention, prime number diffusion filter processor 1200 is between image-signal processor 1100 and error diffusion unit 1300.
In this example, referring to Fig. 1 to 4, prime number diffusion filter processor 1200 is carried out the prime number diffusion filter and is handled on view data, and will stand the view data that the prime number diffusion filter handles and be input to error diffusion unit 1300, handles to stand error diffusion.As a result, at the rare abnormal graph in specific gray scale place.
Figure 11 is the block scheme according to a kind of image display system that is used for PDP of the 3rd preferred embodiment of the present invention.
As shown in figure 11, a kind of image display system that is used for PDP according to the 3rd preferred embodiment of the present invention comprises: image-signal processor 2100, the first prime number diffusion filter processor 2200, error diffusion unit 2300, the second prime number diffusion filter processor 2400, Memory Controller 2500, address driver 2600, keep/scanning impulse driver controller 2700 and keeping/scanning impulse driver 2800.Numbering 2900 indication PDP.50 hertz of PAL-system picture signals that image-signal processor 2100 digitizings receive from the outside, to produce rgb image data, after this this image-signal processor 2100 is exported these rgb image datas.Image-signal processor 2100 is also carried out the characteristic of the Gamma correction processing relevant with gamma value with corresponding PDP 2900.
In rgb image data by image-signal processor 2100 outputs, the first prime number diffusion filter processor 2200 applies the prime number diffusion filter to the rgb image data of low gray area, these data are converted to the view data of special pattern, then export this data converted.One of ordinary skill in the art can easily be predicted the prime number diffusion filter that can use many types except shown in Figure 8.Can use prime number diffusion filter coefficient and wherein merged prime number diffusion filter coefficient and the coefficient of real number diffusion filter coefficient as the coefficient of this prime number diffusion filter.
Error diffusion unit 2300 applies the display error that spreads and receive according to the view data from 2200 outputs of the first prime number diffusion filter processor from neighboring pixel.The result of this processing is then exported in this error diffusion unit 2300.
In rgb image data by image-signal processor 2100 outputs, the second prime number diffusion filter processor 2400 applies the prime number diffusion filter to the rgb image data of middle gray district and high gray area, these data are converted to the view data of special pattern, then export this data converted.One of ordinary skill in the art can easily be predicted the prime number diffusion filter that can use many types except shown in Figure 8.Can use prime number diffusion filter coefficient or real number diffusion filter coefficient coefficient as this prime number diffusion filter.
Memory Controller 2500 produces the sub-field data corresponding to the view data of exporting from the second prime number filter process device 2400.This sub-field data makes the son in a field be divided into two groups (G1 and G2), and the weight of the son of each group is arranged or arrange except all sons of LSB (least significant bit (LSB)) and to have identical structure.Perhaps, the luminance weights value in each group in two sons group is equal to distribution.
Address driver 2600 produces the address date corresponding to the sub-field data of being exported by Memory Controller 2500.This address driver 2600 then this address date is applied to PDP 2900 address electrode (A1, A2 ... Am).
Keep/scanning impulse driver controller 2700 produces corresponding to the son arrangement architecture by the view data of the second prime number filter process device, 2400 outputs, and produces control signal based on a son arrangement architecture that is produced.Keep/scanning impulse driver controller 2700 then exports this control signal to keeping/scanning impulse driver 2800.This keeps/scanning impulse driver 2800 according to by keep/control signal of scanning impulse driver controller 2700 outputs produces and keeps pulse and scanning impulse, then will keep respectively pulse and scanning impulse be applied to PDP 2900 keep electrode (X1, X2 ... Xn) and scan electrode (Y1, Y2 ... Yn).
At the described image display system that is used for PDP according to the 3rd preferred embodiment of the present invention, the first prime number diffusion filter processor 2200 is between image-signal processor 2100 and error diffusion unit 2300.And the second prime number diffusion filter processor, 2400 positions follow closely after the error diffusion unit 2300.
As mentioned above, stand the prime number diffusion filter corresponding to the view data of low gray area by the first prime number diffusion filter processor 2200 and handle, and stand the processing of prime number diffusion filter to the view data of high gray area by the second prime number diffusion filter processor 2400 corresponding to the centre.Promptly, be subjected to the view data of the low gray area of diffusion filter coefficient effect of altitude to stand the prime number diffusion filter and handle, handle and seldom be subjected to centre that the diffusion filter coefficient influences to stand the prime number diffusion filter by the second prime number diffusion filter processor 2400 to the view data of high gray area by the first prime number diffusion filter processor 2200.Thus, might only use prime number diffusion filter coefficient or real number diffusion filter coefficient, and avoid at these specific gray scale place generation abnormal graphs by the second prime number diffusion filter processor 2400.
In above-mentioned method for displaying image and the system that is used for PDP of the present invention, the diffusion filter value is applied on the initial gray scale of being determined by 50 hertz of PAL-system picture signals, and wherein said diffusion filter value is to determine according to the state based on the reference signal that baseband signal produced that is produced successively by 50 hertz of PAL-system picture signals.As a result, by the son field is divided into the generation that two groups of display images have reduced flicker and profile noise.
Also have, therein the picture signal that is converted to the predetermined pattern signal via diffusion filter is added to by in the situation on the picture signal of error diffusion treatment conversion, the generation of conoscope image no longer takes place.
At last,, reduced the profile noise, almost not experience increase on the power consumption of address simultaneously by utilizing prime number diffusion filter coefficient.
Although below described preferred embodiment of the present invention in detail, should be expressly understood that, for one of ordinary skill in the art is conspicuous, and many variations of the basic inventive concept of being informed here and/or modification will still drop in the spirit and scope of the invention that define as claims.
Claims (18)
1. method for displaying image that is used for plasma display panel, the every field picture corresponding to 50 hertz of received image signals that wherein shows on described plasma display panel is divided into a plurality of sons field of different weights, described son field is divided into two son groups continuously again, and the weighted value of a described son group is different, and the weighted value of wherein said son field is merged with display gray scale, and described method comprises:
Have the original data of one or more prime number diffusion filter conversions of prime number diffusion filter coefficient by utilization corresponding to described picture signal;
By the gradation data of described view data is partly regarded as error and diffusion corresponding to the described error of the scheduled volume of each neighbor to neighbor, produce the final image data on the original data of being changed, to carry out error diffusion to handle; And
Carrying out the feasible image corresponding to generation final image data of control is shown on the described plasma display panel.
2. method according to claim 1, wherein said prime number diffusion filter coefficient are prime number coefficient or the coefficient that passes through to merge a prime number and real number acquisition.
3. method according to claim 1, wherein the described prime number diffusion filter coefficient that is had by described prime number diffusion filter is to realize by the figure signal that has opposite characteristic on horizontal direction relevant with described pixel and vertical direction.
4. method according to claim 3, wherein the described prime number diffusion filter coefficient that is had by described prime number diffusion filter is to realize by the figure signal that has opposite characteristic on the time orientation relevant with described pixel, and
Wherein said time orientation is by a plurality of frame appointments, and is to realize by the figure signal with opposite characteristic relevant with consecutive frame by the prime number diffusion filter coefficient that each the prime number diffusion filter that is applied to each frame has.
5. method for displaying image that is used for plasma display panel, the every field picture corresponding to 50 hertz of received image signals that wherein shows on described plasma display panel is divided into a plurality of sons field of different weights, described son field is divided into two son groups continuously again, and the weighted value of a described son group is different, and the weighted value of wherein said son field is merged with display gray scale, and described method comprises:
Have the original data of the first prime number diffusion filter conversion of the first prime number diffusion filter coefficient by utilization corresponding to described picture signal;
By the gradation data of described view data is partly regarded as error and diffusion corresponding to the described error of the scheduled volume of each neighbor to neighbor, handle on the original data of being changed, to carry out error diffusion;
Conversion has stood described view data that described error diffusion handles producing the final image data, and the second prime number diffusion filter that has second a prime number diffusion filter coefficient by utilization is carried out the conversion that has stood the described view data that described error diffusion handles;
Carrying out the feasible image corresponding to the final image data that produced of control is shown on the described plasma display panel.
6. method according to claim 5, the wherein said first prime number diffusion filter apply the described first prime number diffusion filter coefficient to the described input image data corresponding to low gray area.
7. method according to claim 6, the wherein said first prime number diffusion filter coefficient are prime number coefficient or the coefficient that passes through to merge a prime number and real number acquisition.
8. method according to claim 6, the wherein said second prime number diffusion filter apply the described second prime number diffusion filter coefficient to corresponding to extending on the described input image data of high gray area from middle gray area.
9. method according to claim 8, the wherein said second prime number diffusion filter coefficient is a prime number coefficient or a real number coefficient.
10. image display system that is used for plasma display panel, the every field picture corresponding to 50 hertz of received image signals that wherein shows on described plasma display panel is divided into a plurality of sons field of different weights, described son field is divided into two son groups continuously again, and the weighted value of a described son group is different, and the weighted value of wherein said son field is merged with display gray scale, and described system comprises:
Image-signal processor produces Digital Image Data by the described received image signal of digitizing;
Prime number diffusion filter processor is by using the prime number diffusion filter coefficient of appointment to change described Digital Image Data on by the Digital Image Data of image-signal processor output;
The error diffusion unit, by the gradation data of described view data being regarded partly as error and diffusion carry out error diffusion to neighbor in the described view data of exporting corresponding to the described error of the scheduled volume of each neighborhood pixels and handle from described prime number diffusion filter processor, to produce the final image data;
Memory Controller produces the sub-field data corresponding to the described final image data that produced by described error diffusion unit, and applies described sub-field data to described plasma display panel; And
Keep/the scanning impulse driver controller, generation is corresponding to a son arrangement architecture of the described final image data that produced by described error diffusion unit, produce control signal based on a son arrangement architecture that is produced, and apply described control signal to described plasma display panel.
11. system according to claim 10, coefficient that wherein said prime number diffusion filter coefficient is a prime number or the coefficient that obtains by merging one prime number and a real number.
12. system according to claim 10, wherein said prime number diffusion filter coefficient is to realize by the figure signal that has opposite characteristic on horizontal direction relevant with described pixel and vertical direction.
13. system according to claim 12, wherein said prime number diffusion filter coefficient is to realize by the figure signal that has opposite characteristic on the time orientation relevant with described pixel, and
Wherein said time orientation is by a plurality of frame appointments, and is to realize by the figure signal with opposite characteristic relevant with consecutive frame by the prime number diffusion filter coefficient that each the prime number diffusion filter that is applied to each frame has.
14. image display system that is used for plasma display panel, the every field picture corresponding to 50 hertz of received image signals that wherein shows on described plasma display panel is divided into a plurality of sons field of different weights, described son field is divided into two son groups continuously again, and the weighted value of a described son group is different, and the weighted value of wherein said son field is merged with display gray scale, and described system comprises:
Image-signal processor produces Digital Image Data by the described received image signal of digitizing;
The first prime number diffusion filter processor by utilizing the first prime number diffusion filter coefficient of appointment to change described Digital Image Data, is then exported the result of this processing on the Digital Image Data by described image-signal processor output;
The error diffusion unit, by the gradation data of described input image data is partly regarded as error and in by the described view data of conversion of the described first prime number diffusion filter processor and output the described error of diffusion handle and produce view data to carry out error diffusion corresponding to each neighbor;
The second prime number diffusion filter processor, by the described view data that has stood the error diffusion processing of the second prime number diffusion filter coefficient conversion that utilizes appointment on the view data of handling in the error diffusion that stands described error diffusion unit, then export the final image data that obtain;
Memory Controller produces the sub-field data corresponding to the final image data that produced by the described second prime number diffusion filter processor, and applies described sub-field data to described plasma display panel; And
Keep/the scanning impulse driver controller, generation is corresponding to a son arrangement architecture of the described final image data that produced by the described second prime number diffusion filter processor, produce control signal based on a son arrangement architecture that is produced, and apply described control signal to described plasma display panel.
15. system according to claim 14, the wherein said first prime number diffusion filter applies the described first prime number diffusion filter coefficient to the described input image data corresponding to low gray area.
16. system according to claim 15, the wherein said first prime number diffusion filter coefficient is prime number coefficient or the coefficient that passes through to merge a prime number and real number acquisition.
17. system according to claim 15, the wherein said second prime number diffusion filter applies the described second prime number diffusion filter coefficient to the described input image data corresponding to the zone that extends to high gray area from middle gray area.
18. system according to claim 17, the wherein said second prime number diffusion filter coefficient is a prime number coefficient or a real number coefficient.
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| KR100882908B1 (en) * | 2007-06-21 | 2009-02-10 | 삼성모바일디스플레이주식회사 | Driving method of Organic Light Emitting Diode display device |
| KR20230159736A (en) | 2022-05-12 | 2023-11-22 | 삼성디스플레이 주식회사 | Controller, display device including the same, and method of driving display device using the same |
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| EP0982707A1 (en) * | 1998-08-19 | 2000-03-01 | Deutsche Thomson-Brandt Gmbh | Method and apparatus for processing video pictures, in particular for large area flicker effect reduction |
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| JPH07261696A (en) * | 1994-03-18 | 1995-10-13 | Fujitsu General Ltd | Gradation display method |
| JP3354741B2 (en) * | 1995-04-17 | 2002-12-09 | 富士通株式会社 | Halftone display method and halftone display device |
| JP2994633B2 (en) * | 1997-12-10 | 1999-12-27 | 松下電器産業株式会社 | Pseudo-contour noise detection device and display device using the same |
| JP3638099B2 (en) * | 1999-07-28 | 2005-04-13 | パイオニアプラズマディスプレイ株式会社 | Subfield gradation display method and plasma display |
| KR20010096310A (en) * | 2000-04-18 | 2001-11-07 | 구자홍 | Apparatus and method for driving plasma display panel |
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| US6144364A (en) * | 1995-10-24 | 2000-11-07 | Fujitsu Limited | Display driving method and apparatus |
| EP0893916A2 (en) * | 1997-07-24 | 1999-01-27 | Matsushita Electric Industrial Co., Ltd. | Image display apparatus and image evaluation apparatus |
| EP0982707A1 (en) * | 1998-08-19 | 2000-03-01 | Deutsche Thomson-Brandt Gmbh | Method and apparatus for processing video pictures, in particular for large area flicker effect reduction |
| CN1293803A (en) * | 1999-01-22 | 2001-05-02 | 松下电器产业株式会社 | Apparatus and method for making gray display with subframes |
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