CN1920914A - Plasma display device and image processing method thereof - Google Patents
Plasma display device and image processing method thereof Download PDFInfo
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- CN1920914A CN1920914A CNA2006101596099A CN200610159609A CN1920914A CN 1920914 A CN1920914 A CN 1920914A CN A2006101596099 A CNA2006101596099 A CN A2006101596099A CN 200610159609 A CN200610159609 A CN 200610159609A CN 1920914 A CN1920914 A CN 1920914A
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B97/00—Furniture or accessories for furniture, not provided for in other groups of this subclass
- A47B97/04—Easels or stands for blackboards or the like
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47G—HOUSEHOLD OR TABLE EQUIPMENT
- A47G1/00—Mirrors; Picture frames or the like, e.g. provided with heating, lighting or ventilating means
- A47G1/14—Photograph stands
- A47G1/142—Supporting legs or feet
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47G—HOUSEHOLD OR TABLE EQUIPMENT
- A47G33/00—Religious or ritual equipment in dwelling or for general use
- A47G33/008—Devices related to praying, e.g. counters, reminders, study aids, compasses, rugs, cushions, or the like
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Abstract
Disclosed is a plasma display device and image processing method thereof, including: an image signal receive section dividing a plurality of pixels corresponding to the image plane into at least more than two pixel fields, dividing the external image signal data into a plurality of channels based on the pixel fields and synchronizing and outputting a plurality of channels with a clock signal; and a half tone part processing the error diffusion on the image signal data transmitted by the image signal receive section according to the channels. The invention can improve the speed and the quality of image processing.
Description
One, technical field
The invention relates to the Flame Image Process of plasma apparatus, more specifically say, is a kind of plasma display system and image processing method thereof that can improve the speed and the quality of Flame Image Process.
Two, background technology
General Plasmia indicating panel, form a unit cell (cell) by the interlayer that forms between front panel and back panel, filled neon (Ne) in each cell (cell), helium (He), or the mixed gas of neon and helium main discharge gases such as (Ne+He) and the inert gas that contains xenon on a small quantity.Above-mentioned a plurality of unit discharge cells (cell) are combined and are formed a pixel (Pixel).It is for example, red that (green (blue (Blue, B) cell (cell) is combined to form a pixel (pixel) for Green, G) cell (cell) for Red, R) cell (cell).Bear in aforesaid unit discharge cell (cell) when adding the guiding discharge of high frequency voltage, inert gas produces vacuum ultraviolet (Vacuum Ultraviolet ray), makes the light-emitting phosphor that forms between interlayer, display frame.Aforesaid Plasmia indicating panel has not only light but also thin structure, attracts tremendous attention as display device of new generation.
Fig. 1 is the method for displaying image synoptic diagram of prior art ionic medium display device.
As shown in Figure 1, plasma display system is divided into the different a plurality of subdomains (sub-field) of number of light emission times during with a frame (frame), during the subdomain (sub-field) of GTG value corresponding to the picture signal of input, make Plasmia indicating panel luminous, thus display image.
Each subdomain (sub-field) is divided into: the reseting period that balancedly produces discharge; Select during the location of discharge cell (cell); And during showing keeping of GTG according to discharge time.For example, when using 256 GTG display images in advance, will be equivalent to 1/60 second frame (frame) during (16.67ms) be divided into 8 subdomains (sub-field).
Simultaneously, 8 subdomains (sub-field) are divided into respectively: reseting period, during the location and during keeping.Wherein, in each subdomain (sub-field), increase during keeping with the ratio of 2n (n=0,1,2,3,4,5,6,7).As mentioned above, different during the keeping in each subdomain (sub-field), thereby, GTG (Gray level) that can display image.
Light characteristic to aforesaid plasma display system describes following Fig. 2 a.
Fig. 2 a is the light characteristic comparative graph of plasma display system and cathode-ray tube (CRT).
Shown in Fig. 2 a, and cathode-ray tube (CRT) (Cathode-RayTube, CRT) and liquid crystal indicator (LiquidCrystalDisplay, LCD) to the vision signal of input,, thereby show required GTG with the light of analog form control demonstration, therefore, generally has nonlinear light characteristic.Different therewith, the plasma display system utilization can be opened the matrix form of (on)/the close discharge cell (cell) of (off) and be arranged (matrixarray), and the quantity of modulating light pulse shows GTG.Therefore, has linear light characteristic.The GTG display packing of above-mentioned plasma display system is called PWM (Pulse Width Modulation) method.
At this moment, in the display device such as cathode ray tube (CRT), show that electric current and light characteristic are 2.2 times ratio, therefore, external image signals such as broadcast singal, transmission is corresponding to the signal of 2.2 times inverse.Therefore, plasma display system with linear luminance characteristic, the picture signal of the outside input of reply is carried out contrary gamma compensated (reverse gamma compensation), and above-mentioned contrary gamma compensated (reversegammacompensation) is described following Fig. 2 b.
Fig. 2 b is in the prior art, the contrary gamma compensated of plasma display system (reverse gammacompensation) curve map.
Among Fig. 2 b, object brightness is ideal inverse gamma (reverse gamma) result who compensates in advance, intrinsic brilliance is the result after the contrary gamma compensated (reverse gamma compensation), it is the particular luminance value that shows, PDP brightness is not carry out under the contrary state of gamma compensated (reverse gamma compensation), and the brightness value of measurement is below 3.
Shown in Fig. 2 b, the GTG value of object brightness from ' 0 ' to 61 stages of ' 60 ' is shown as different brightness values respectively.Different therewith, the GTG value of intrinsic brilliance from ' 0 ' to 61 stages of ' 60 ' only is shown as 8 kinds of brightness values.Therefore, in the plasma display system, when carrying out, can't show sufficient GTG, therefore will doubling of the image false contouring (Contour Noise) together occur seeming in darker field against gamma compensated (reverse gamma compensation).
Aforesaid in order to show, the GTG of deficiency among the PDP, use halftoning (half tone) methods such as shake (dithering) method or error diffusion (error diffusion) method, wherein error diffusion (error diffusion) method is described following Fig. 3.
Fig. 3 a and Fig. 3 b are in the prior art, the error diffusion of Plasmia indicating panel (errordiffusion) method synoptic diagram.
Fig. 3 a is in the prior art, the error diffusion of 1 channel mode (error diffusion) method is carried out the figure of spatiality explanation, Fig. 3 b is to example of multichannel, and promptly the error diffusion of 2 channel modes (error diffusion) method is carried out the figure of spatiality explanation.
Shown in Fig. 3 a and Fig. 3 b, error diffusion (errordiffusion) method, the error effect that takes place when making corresponding pixel (pixel) carry out quantization (Quantization) is to adjacent pixels (pixel), thereby spatiality ground solves the compensation of error to broadening.
Wherein, with reference to figure 3a, error diffusion in 1 channel (error diffusion) method, with adjacent pixels (pixel), be lastrow (line) three pixels (pixel) (a, b, c) and next door adjacent pixels (pixel) error amount and the particular factor that take place in (d) multiply each other.Then, will (i) be worth addition, carry out quantization with the error amount and the center cell (cell) of above-mentioned multiplication.Then, the storage of the error amount that produces during with above-mentioned quantization is expert in (line) storer, and in each pixel (pixel) said process repeatedly.
Aforesaid error diffusion (errordiffusion) method especially can show quite high image quality in moving image, and can not occur owing to the certain image noise (pattern noise) that utilizes shake (dithering) method to take place.
But error diffusion (errordiffusion) method is when showing static image, and is identical with shake (dithering) method, will static figure (pattern) occur.Above-mentioned static figure (pattern) will multiply each other with fractional value, thereby error diffusion (errordiffusion) coefficient of diffusion will keep certain value, therefore, in specific GTG, be shown as the error diffusion figure (errordiffusionpattern) of accumulation.Especially when the luminance difference of actual gray was big, above-mentioned error diffusion figure (errordiffusionpattern) was quite strong, may cause image noise (pattern noise).Especially more serious in the much darker pictures of low GTG.
Again, above-mentioned noise is along with display device is tending towards maximizing, and is more serious in the multichannel pattern of using for high-speed driving.
That is, in the aforesaid multichannel pattern, picture signal is divided into 2 channel mode CH1 shown in Fig. 3 b, CH2 carries out error diffusion (error diffusion) respectively to each channel.
More specifically say, with first channel (CH1) adjacent pixels (pixel), promptly, three pixels (pixel) (a of the same channel of lastrow (line), b, c) error amount that takes place in (d) of the next door adjacent pixels (pixel) of identical channel multiplies each other with particular factor respectively, with (i) propagated error of center cell (cell).Second channel (CH2) is also identical, with adjacent pixels (pixel), promptly, three pixels (pixel) of the same channel of lastrow (line) (a ', b ', c ') error amount that takes place in the next door adjacent pixels (pixel) of identical channel (d ') multiplies each other with particular factor respectively, with (i) propagated error of center cell (cell).
In the aforesaid multichannel pattern, each channel all uses identical figure (pattern) to carry out error diffusion (error diffusion), so noise will be more serious.And because noise increases the weight of, then people can see, the image quality of picture also reduces more.
Three, summary of the invention
In view of this, the object of the present invention is to provide a kind of plasma display system and image processing method thereof that can improve image processing speed.
Again, another object of the present invention is to provide a kind of plasma display system and image processing method thereof that can improve picture quality.
Technical scheme of the present invention is not to be subject to foregoing, and any those skilled in the art to other technical scheme that will reach among the present invention, can have suggested by following summary of the invention.
Invent for addressing the above problem, plasma display system among the present invention, comprise: will be divided at least two above pixels (pixel) field corresponding to a plurality of pixels (pixel) of picture, according to above-mentioned pixel (pixel) field, the image signal data of outside is divided into a plurality of channels, above-mentioned a plurality of channels and a clock signal are carried out synchronously and the picture signal reception portion of output; And by each channel, the image signal data that above-mentioned picture signal reception portion is transmitted carries out halftoning (half tone) portion of error diffusion (error diffusion).
Again, above-mentioned picture signal reception portion will be divided into two pixels (pixel) field corresponding to a plurality of pixels (pixel) of above-mentioned picture, according to above-mentioned pixel (pixel) field, above-mentioned image signal data is divided into two channels and carry out synchronously output then with a clock signal.
Again, above-mentioned halftoning (half tone) portion adjusts the direction of carrying out error diffusion (error diffusion) in above-mentioned pixel (pixel) field according to row (line).
Again, above-mentioned halftoning (half tone) portion, critical the overlapping that above-mentioned two above pixels (pixel) field is adjacent carried out error diffusion (error diffusion) together.
Again, above-mentioned critical part is more than 8 pixels (pixel).
Again, above-mentioned critical part is more than the l6 pixel (pixel).
Invent for addressing the above problem, the image processing method of the plasma display system among the present invention, comprise: will be divided at least two above pixels (pixel) field corresponding to a plurality of pixels (pixel) of picture, according to above-mentioned pixel (pixel) field, the image signal data of outside is divided into a plurality of channels, above-mentioned a plurality of channels and a clock signal are carried out synchronously and the picture signal of the output reception stage; And by each channel, the image signal data that above-mentioned picture signal reception portion is transmitted carries out halftoning (halftone) stage of error diffusion (error diffusion).
Again, above-mentioned picture signal receives the stage, will be divided into two pixels (pixel) field corresponding to a plurality of pixels (pixel) of above-mentioned picture, according to above-mentioned pixel (pixel) field, above-mentioned image signal data is divided into two channels and carry out synchronously output then with a clock signal.
In above-mentioned halftoning (half tone) stage, adjust the direction of carrying out error diffusion (error diffusion) in above-mentioned pixel (pixel) field according to row (line) again.
Again, in above-mentioned halftoning (half tone) stage, critical the overlapping that above-mentioned two above pixels (pixel) field is adjacent carried out error diffusion (error diffusion) together.
Again, above-mentioned critical part is more than 8 pixels (pixel).
Again, above-mentioned critical part is more than 16 pixels (pixel).
Beneficial effect of the present invention is as follows:
Plasma display system among the present invention and image processing method thereof can improve the speed of Flame Image Process; Can reduce the noise that occurs in the picture; Can improve the quality of picture; Can carry out high-speed driving, thereby reduce the burden that high frequency is handled.
Four, description of drawings
Fig. 1 is the method for displaying image synoptic diagram of prior art ionic medium display device.
Fig. 2 a is the light characteristic comparative graph of plasma display system and cathode-ray tube (CRT).
Fig. 2 b is contrary gamma compensated (reversegammacompensation) curve map of prior art ionic medium display device.
Fig. 3 a and Fig. 3 b are error diffusion (error diffusion) the method synoptic diagram of prior art ionic medium display panel.
Fig. 4 is the synoptic diagram of ionic medium display device of the present invention.
Fig. 5 is the calcspar of an example of halftoning among the present invention (half tone) portion.
Fig. 6 is an example schematic carrying out the calcspar of error diffusion (error diffusion) among the present invention.
Fig. 7 is the synoptic diagram of (pixel) field of pixel in the one embodiment of the invention and error diffusion (errordiffusion) method.
Fig. 8 is in another example of the present invention, the synoptic diagram of error diffusion (error diffusion) method.
Fig. 9 a and Fig. 9 b are among the present invention, the comparison synoptic diagram of the error diffusion figure of plasma display system (errordiffusion pattern) picture.
The symbol description of major part in the diagram
410: picture signal reception portion 420: contrary gamma compensated (reversegammacompensation) portion
430: halftoning (half tone) portion 440: subdomain mapping (sub-field mapping) portion
450: plasma display panel module
Five, embodiment
Below, conjunction with figs. is elaborated as follows to the structure of the Plasmia indicating panel among the present invention.
Fig. 4 is among the present invention, the synoptic diagram of plasma display system.
As shown in Figure 4, plasma display system in the one embodiment of the invention, comprise: picture signal reception portion 410, contrary gamma compensated (reverse gamma compensation) portion 420, halftoning (half tone) portion 430, subdomain mapping (sub-field mapping) portion 440 and plasma display module 450.
Picture signal reception portion 410 will be divided at least two above pixels (pixel) field corresponding to a plurality of pixels (pixel) of picture, according to pixel (pixel) field, the image signal data of outside is divided into a plurality of channels, a plurality of channels and clock signal are carried out synchronously and output in contrary gamma compensated (reverse gammacompensation) portion 420.Wherein, different in the picture signal reception portion 410 among the present invention and the prior art as mentioned above, channel zone is divided into the picture field, cooperate Fig. 5 to describe later on to this detailed content.
The image signal data that 420 pairs of picture signal receptions portion of contrary gamma compensated (reverse gamma compensation) portion 410 transmits carries out contrary gamma compensated (reverse gamma compensation), the brightness value that shows in the GTG value of picture signal to input carries out linear transformation.Wherein, contrary gamma compensated among Fig. 4 (reverse gamma compensation) portion 420 possesses contrary gamma compensated (reversegamma compensation) portion respectively according to channel, but be not to be subject to this, can also carry out contrary gamma compensated (reverse gamma compensation) by contrary gamma compensated (reversegamma compensation) portion.
Halftoning (half tone) portion 430 will be against the image signal data of gamma compensated (reverse gamma compensation) portion 420 transmission, by each channel, to be diffused in the adjacent pixels (pixel) according to the error percentage of error diffusion (error diffusion) coefficient, thereby the brightness value that fine setting shows according to the GTG value, the display capabilities of raising GTG.
Subdomain mapping (sub-field mapping) portion 460 arrives the picture signal mapping (mapping) of halftoning (half tone) portion 430 inputs in the predefined subdomain mapping table (sub-field mapping table).
Digital signal through as above handling is sent in the plasma display panel module 450 by digital drive portion (not shown), thereby shows the image of Plasmia indicating panel.
Wherein, to the image signal data in the picture field that will as above divide, divide into a plurality of channels and carry out error diffusion (error diffusion), (half tone) portion of the halftoning among the present invention and error diffusion (error diffusion) method cooperate down that Fig. 5 and Fig. 6 are elaborated.
Fig. 5 is among the present invention, the calcspar of an example of halftoning (half tone) portion.
As shown in Figure 5, halftoning among the present invention (half tone) portion, comprise in one of them example: error diffusion coefficient contrast form (error diffusion coefficient lookup table) storage part 431, row (line) storage part 432, delayed image signal portion 433 and error diffusion (error diffusion) execution portion 434.
In the halftoning of one embodiment of the invention (half tone) portion 430, error diffusion (errordiffusion) execution portion 434 is with in each channel, carry out the fractional value of GTG value of the data of contrary gamma compensated (reversegammacompensation), each error diffusion (errordiffusion) multiplication with distributing according to the GTG value of each channel image signal data is diffused into the above-mentioned error percentage that multiplies each other in the adjacent cell (cell).
At this moment, as shown in Figure 5, possess error diffusion coefficient contrast form (error diffusioncoefficient lookup table) storage part 431, will be stored in advance according to each error diffusion (errordiffusion) coefficient information that each GTG value is distributed.
Wherein, error diffusion coefficient contrast form (error diffusion coefficient lookup table) storage part 431 can be positioned at the inside or the outside of halftoning (half tone) portion 430.
Then, error diffusion (error diffusion) execution portion 434 receives error diffusion (error diffusion) coefficient information from error diffusion coefficient contrast form (error diffusion coefficient lookup table) storage part 431, carry out error diffusion (error diffusion) by each channel, aforesaid error diffusion (error diffusion) manner of execution is elaborated and is illustrated in fig. 6 shown below.
Fig. 6 is among the present invention, carries out an example schematic of the calcspar of error diffusion (error diffusion).
As shown in Figure 6, error diffusion (error diffusion) method, the error effect that takes place when making corresponding pixel (pixel) carry out quantization (Quantization) is to adjacent pixels (pixel), thus spatiality ground solves the compensation of error to broadening.
Wherein, error diffusion (error diffusion) method, with each error amount of generation in the adjacent pixels (pixel) and specific multiplication, will be worth addition with the error amount and the center cell (cell) of above-mentioned multiplication, carry out quantization (Quantization).Then, the error amount that takes place during again with above-mentioned quantization (Quantization) stores in row (line) storer, and in every pixel (pixel) said process repeatedly.
That is, as shown in Figure 6, error diffusion piece (error diffusion block) is carried out spatiality feedback process (feedback routine) repeatedly, thus the brightness value and the output of approaching above-mentioned object brightness of mapping (mapping).Say that more specifically among Fig. 6, the process of work can be represented with following mathematical formulae 1 and mathematical formulae 2.
E
n(i，j)＝f
n(i，j)-B
n(i，j)
Wherein, mathematical formulae 1, the parameter among mathematical formulae 2 and Fig. 6 is as giving a definition:
N refers to, current frame (frame).
(i j) refers to F, carries out the GTG value of above-mentioned contrary gamma compensated (reverse gamma compensation) back input.
Q piece (block) refers to, quantization piece (Quantization block).
(i j) refers to B, through the GTG value of quantization (Quantization).
(i j) refers to E, the error amount that takes place in quantization (Quantization) process.
(i j) refers to f, will carry out the GTG value of contrary gamma compensated (reverse gamma compensation) back input and the value of quantization (Quantization) error amount addition.
That is, (i j) is, with ((i j) multiplies each other, then the value of addition with error diffusion (error diffusion) coefficient h for i, j) error amount of adjacent pixels (pixel) and H piece (block) with F in the present frame (frame) f.
Then, the row among Fig. 5 (line) storage part 432 will be that unit stores with row (line) through the picture signal of contrary gamma compensated (reverse gammacompensation).Again, the GTG value of the picture signal of error diffusion (error diffusion) is carried out in 432 storages of row (line) storage part, and repeats said process in every pixel (pixel).
Delayed image signal portion 433 use error diffusion couples are according to forms (error diffusion lookuptable) 431, in order will to be reflected in the adjacent cell (cell) through the new GTG value of error diffusion (error diffusion), and the delayed image signal.
Wherein, error diffusion among the present invention (error diffusion) execution portion 434, unlike the prior art, will be corresponding to the image signal data in two above pixels (pixel) field in active area field, distinguish and carry out error diffusion (error diffusion) by each channel, thereby reduce image noise (patternnoise), make it can carry out high-speed driving, shown in Figure 7 to being described as follows of this.
Fig. 7 is in the one embodiment of the invention, the synoptic diagram of pixel (pixel) field and error diffusion (error diffusion) method.
As shown in Figure 7, a plurality of pixels (pixel) field corresponding to the picture field of display image can be divided into two above pixels (pixel) field.
Promptly, as an example, 1920*1080Full HD picture is divided into field, left side (ED.1) and field, right side (ED.2), can be with image signal data corresponding to field, left side (ED.1), with divide into channel respectively corresponding to the image signal data of field, right side (ED.2), transmit signal with the multichannel pattern.
Wherein, the multichannel pattern refers to, image signal data is divided into a plurality of channels, above-mentioned channel and a clock signal is carried out synchronously also output, thereby can improve the technology of the transfer rate of image signal data.
Aforesaid multichannel pattern, display of high resolution easily not only can also solve the problem of clock surplus (clock margin).Again, as mentioned above, can carry out high-speed driving, drive, reduce the burden that high frequency is handled thereby can reduce frequency.
Wherein, the present invention in above-mentioned multichannel pattern, presses the picture field and distinguishes channel, thereby can significantly reduce the noise that the multichannel pattern occurs in the prior art unlike the prior art.
Promptly, more specifically say, as shown in Figure 7, to be made as the 1st channel corresponding to the image signal data of the pixel (pixel) of field (ED.1) on the left of the picture, to be made as the 2nd channel corresponding to the image signal data of the pixel (pixel) in field, picture right side (ED.2), each channel and a clock signal are carried out synchronously and output, thereby can carry out high-speed driving.
Again, to divide into channel corresponding to the image signal data in pixel (pixel) field of each division, carry out error diffusion (error diffusion) by each channel, thereby can prevent that in the multichannel pattern of prior art, the overlapping phenomenon of identical figure (pattern) noise all appears in each channel.Thereby, can improve the quality of the image that display device shows.
Again, in the one embodiment of the invention, the critical part that plural pixel (pixel) field is adjacent is carried out error diffusion (error diffusion) after can be overlapping.Promptly, as shown in Figure 7, in right pixel (pixel) field (ED.2) of left pixel (pixel) field (ED.1) of picture and picture, error diffusion (error diffusion) is carried out after can be overlapping in certain pixel (pixel) field (OL) of critical part.
Carry out error diffusion (errordiffusion) with after the overlapping of picture pixel (pixel) field as above divided, thereby not only can remove the contingent noise of critical part, display frame more swimmingly.
Again, as above overlaid pixel (pixel) field and carry out error diffusion (error diffusion) can prevent error diffusion (error diffusion) initial stage, because the noise that unsettled error diffusion (error diffusion) causes.
That is, when carrying out error diffusion (error diffusion) method, the error amount of pixel (pixel) builds up, and can obtain more stable error amount, therefore can improve the reliability of error diffusion (error diffusion).But, when carrying out error diffusion (error diffusion) first, only use the error amount of initial pixel (pixel) to carry out error diffusion (error diffusion), therefore, stable figure (pattern) can not appear, and noise appears, it being overlaped and carry out error diffusion (error diffusion) to prevent above-mentioned phenomenon.
Wherein, certain pixel (pixel) field of above-mentioned critical part is made as more than 8 pixels (pixel), thereby can makes image noise (pattern noise) minimum.Again, more reasonably be, certain pixel (pixel) field of above-mentioned critical part be made as more than 16 pixels (pixel), thereby can make image noise (pattern noise) reach optimum condition, improve image quality.
Again, when carrying out error diffusion (error diffusion), spread the direction of (error diffusion) by each row (line) departure, thereby can reduce the image noise (pattern noise) of error diffusion (error diffusion), shown in Figure 8 to being described as follows of this.
Fig. 8 is in another example of the present invention, the synoptic diagram of error diffusion (error diffusion) method.
As shown in Figure 8, as an example, a plurality of pixels (pixel) field corresponding to the picture field of display image can be divided into two above pixels (pixel) field, and the image signal data in above-mentioned field is divided into a plurality of channels.
Promptly, as an example, 1920*1080Full HD picture is divided into field, left side (ED.1) and field, right side (ED.2), can be with image signal data corresponding to field, left side (ED.1), with divide into channel respectively corresponding to the image signal data of field, right side (ED.2), transmit signal with the multichannel pattern.
Promptly, more specifically say, as shown in Figure 8, to be made as the 1st channel corresponding to the image signal data of the pixel (pixel) of field (ED.1) on the left of the picture, to be made as the 2nd channel corresponding to the image signal data of the pixel (pixel) in field, picture right side (ED.2), each channel and a clock signal are carried out synchronously and output, thereby can carry out high-speed driving.
Again, to divide into channel corresponding to the image signal data in pixel (pixel) field of each division, carry out error diffusion (error diffusion) by each channel, thereby can prevent that in the multichannel pattern of prior art, the overlapping phenomenon of identical figure (pattern) noise all appears in each channel.
Wherein, in the another embodiment of the present invention, pressing pixel (pixel) field of as above dividing, promptly, when each channel carries out error diffusion (error diffusion), can adjust the direction of error diffusion (error diffusion) by each pixel column (pixel line).That is,, can in each pixel column (pixelline), all change the direction of error diffusion (error diffusion), carry out error diffusion (error diffusion) in the sawtooth mode as an example.
As mentioned above, adjust the direction of error diffusion (error diffusion), thereby can reduce the image noise (pattern noise) that occurs when carrying out error diffusion (error diffusion), show the image quality better pictures with equidirectional.
Among aforesaid the present invention, the effect that the image noise (pattern noise) that is presented on the image is reduced to some extent is compared as follows shown in Figure 9.
Fig. 9 a and Fig. 9 b are among the present invention, the comparison synoptic diagram of the error diffusion figure of plasma display system (errordiffusion pattern) picture.
Fig. 9 a is in the plasma display system of the prior art, an example of multichannel pattern, the i.e. error diffusion figure that occurs in 2 channel modes (error diffusion pattern) synoptic diagram, Fig. 9 b is in the plasma display system of the present invention, an example of multichannel pattern, i.e. the error diffusion figure that occurs in 2 channel modes (error diffusion pattern) synoptic diagram.
Shown in Fig. 9 a and Fig. 9 b, occur among Fig. 9 a, the error diffusion figure of multichannel pattern of the prior art (error diffusion pattern) is divided into other channels with adjacent pixels (pixel), carries out error diffusion (error diffusion).At this moment, because all identical error diffusion figure (errordiffusion pattern) in each channel, channel 1 is combined as one with 2,2 pixels of channel (pixel) unit, 2 heavy error diffusion figure noises (error diffusion pattern noise) will occur.
On the contrary, shown in Fig. 9 b, with the image signal data in pixel (pixel) field divided, distinguish among the present invention by channel, and when carrying out error diffusion (error diffusion) by each channel, error diffusion figure (error diffusion pattern) evenly and fine is shown.
As mentioned above, the use of error diffusion among the present invention (error diffusion) method, can remove the 2 heavy error diffusion figure noises (error diffusionpattern noise) that use multichannel pattern of the prior art and cause, improve the display capabilities of GTG.
Therefore, not only realized the high-speed driving display device among the present invention, display of high resolution, and improved the image quality problem that wherein takes place, thus can improve the quality of the image of display device demonstration.
Aforesaid, structure of the present invention is not to be subject to the foregoing description.That is, be not to be subject to 2 divisions that pixel (pixel) field are divided into field, right side and field, left side, can carry out 3 and divide, 4 divide, and 5 divide, 6 divisions etc.Along with increasing of resolution, can increase the quantity of division.
Again, the above embodiment of the present invention not only can be used for plasma display system, can also be used for LCD, DMD, and Projector, FED, in the Flame Image Process of all display device such as SED, thus the reliability of raising Flame Image Process.
As mentioned above, plasma display system among the present invention and image processing method thereof can improve the speed of Flame Image Process; Can reduce the noise that occurs in the picture; Can improve the quality of picture; Can carry out high-speed driving, thereby reduce the burden that high frequency is handled.
As mentioned above; though the present invention about plasma display system and image processing method thereof with preferred embodiment openly as above; right its is not in order to limit the present invention; any those skilled in the art; under the situation that does not break away from the spirit and scope of the present invention; can carry out various changes and modification, so protection scope of the present invention is as the criterion when looking the claim restricted portion that is proposed.
Claims (12)
1, a kind of plasma display system, it is characterized in that: it comprises a plurality of pixels corresponding to picture is divided at least two above pixel fields, according to above-mentioned pixel field, the image signal data of outside is divided into a plurality of channels, above-mentioned a plurality of channels and a clock signal are carried out synchronously and the picture signal reception portion of output; And by each channel, the image signal data that above-mentioned picture signal reception portion is transmitted carries out the halftoning portion of error diffusion.
2, plasma display system according to claim 1, it is characterized in that: above-mentioned picture signal reception portion will be divided into two pixel fields corresponding to a plurality of pixels of above-mentioned picture, according to above-mentioned pixel field, above-mentioned image signal data is divided into two channels and carry out synchronously output then with a clock signal.
3, plasma display system according to claim 1 is characterized in that: above-mentioned halftoning portion adjusts the direction of carrying out error diffusion in the above-mentioned pixel field according to row.
4, plasma display system according to claim 1 is characterized in that: above-mentioned halftoning portion critical the overlapping that above-mentioned two above pixel fields are adjacent carried out error diffusion together.
5, plasma display system according to claim 4 is characterized in that: above-mentioned critical part is more than 8 pixels.
6, plasma display system according to claim 5 is characterized in that: above-mentioned critical part is more than 16 pixels.
7, a kind of image processing method of plasma display system is characterized in that it comprised as the next stage:
To be divided at least two above pixel fields corresponding to a plurality of pixels of picture, according to above-mentioned pixel field, the image signal data of outside is divided into a plurality of channels, above-mentioned a plurality of channels and a clock signal are carried out synchronously and the picture signal of the output reception stage;
By each channel, the image signal data that above-mentioned picture signal reception portion is transmitted carries out the halftoning stage of error diffusion.
8, the image processing method of plasma display system according to claim 7, it is characterized in that: above-mentioned picture signal receives the stage, to be divided into two pixel fields corresponding to a plurality of pixels of above-mentioned picture, according to above-mentioned pixel field, above-mentioned image signal data is divided into two channels and carry out synchronously output then with a clock signal.
9, the image processing method of plasma display system according to claim 7 is characterized in that: in the above-mentioned halftoning stage, adjust the direction of carrying out error diffusion in the above-mentioned pixel field according to row.
10, the image processing method of plasma display system according to claim 7 is characterized in that: in the above-mentioned halftoning stage, critical the overlapping that above-mentioned two above pixel fields are adjacent carried out error diffusion together.
11, the image processing method of plasma display system according to claim 10 is characterized in that: above-mentioned critical part is more than 8 pixels.
12, the image processing method of plasma display system according to claim 11 is characterized in that: above-mentioned critical part is more than 16 pixels.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020060013906A KR100793103B1 (en) | 2006-02-13 | 2006-02-13 | Plasma Display Apparatus and Image Processing Method there of |
| KR1020060013906 | 2006-02-13 |
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| CN1920914A true CN1920914A (en) | 2007-02-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2006101596099A Pending CN1920914A (en) | 2006-02-13 | 2006-09-26 | Plasma display device and image processing method thereof |
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| KR (1) | KR100793103B1 (en) |
| CN (1) | CN1920914A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102479481A (en) * | 2010-11-29 | 2012-05-30 | 索尼公司 | Image display device, driving method of image display device, image display program, and gradation conversion device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030000031A (en) | 2001-06-15 | 2003-01-06 | 엘지전자 주식회사 | High speed error diffusion apparatus |
| KR100475721B1 (en) | 2001-10-25 | 2005-03-10 | 엘지전자 주식회사 | Error diffusion method using temporal effect and method and apparatus for driving plasma display panel using the same |
| KR20050051017A (en) | 2003-11-26 | 2005-06-01 | 엘지전자 주식회사 | Plasma display panel using differential signal |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102479481A (en) * | 2010-11-29 | 2012-05-30 | 索尼公司 | Image display device, driving method of image display device, image display program, and gradation conversion device |
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| Publication number | Publication date |
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| KR20070081725A (en) | 2007-08-17 |
| KR100793103B1 (en) | 2008-01-10 |
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