CN104505043B - Method and device for gray scale compensation of image data - Google Patents

Abstract

The invention discloses a method and a device for gray scale compensation of image data. The method comprises the steps: receiving to-be-displayed image data, wherein the image data comprises gray scales of N pixels of a frame of image and N is greater than 1; determining a display sub-zone subordinative to the pixel with respect to each pixel in the N pixels; according to the display sub-zone subordinative to the pixel and the gray scales of the image pixels, inquiring a preset compensation data sheet and determining the corresponding compensation value of the pixel; compensating the gray scale of the pixel according to the determined compensation value of the pixel. In the method, firstly, the compensation data sheet is established by data measurement; the gray scale data actually displayed by a display screen is compensated and corrected according to the established compensation data sheet, so that the flickering optimization of any display zone in a whole display panel is realized and the flickering generated in the whole display panel is eliminated.

Description

A kind of gray level compensation method and device of view data

Technical field

The present invention relates to display technology field, the gray level compensation method and device of more particularly to a kind of view data.

Background technology

Liquid crystal display (Liquid Crystal Display, LCD) has compact, Low emissivity and power consumption because of which Low advantage, is used widely at present.

Liquid crystal display controls the light transmittance of liquid crystal cells according to data signal, with show image.To prevent liquid crystal polarization Display effect is affected, the voltage at liquid crystal two ends is added in, positive and negative alternate, due to the difference of generating positive and negative voltage, causes malleation and bears The brightness that panel is produced during pressure is inconsistent, this creates the terminal flicker problem.

In prior art, the flicker for generally designing to eliminate display using multiple public electrodes.

Fig. 1 be prior art in display floater design 4 public electrodes structural representation.As shown in figure 1,4 Public electrode is respectively：V1, V2, V3 and V4.D1～D8 is data wire, and G1～G8 is gate line.Using multiple public electrodes Design, although certain improvement can be accomplished to the flashing state of whole panel, but due to being limited to walking for public electrode The restriction of the number of line and public electrode, still has that whole panel flash is uneven.

The content of the invention

The embodiment of the present invention provides a kind of gray level compensation method and device of view data, to eliminate display picture generation The phenomenon of flicker.

The gray level compensation method of view data provided in an embodiment of the present invention, including：

View data to be shown is received, described image data include the GTG of N number of pixel of a two field picture, and N is more than 1；

For each pixel in N number of pixel, following steps are performed：

Determine the display subregion belonging to pixel；

The GTG for showing subregion and described image pixel according to belonging to the pixel, inquires about default offset data Table, determines the corresponding offset of the pixel；

The GTG of the pixel is compensated according to the offset of the pixel determined.

Wherein, each display subregion is provided with each self-corresponding compensation of every kind of GTG in the offset data table Value；The display subregion of the pixel, refers to the viewing area of a two field picture is obtained according to the regular partition of setting.

The gray scale compensation device of view data provided in an embodiment of the present invention, the device include：Micro-control module MCU sum According to table memorizer；Wherein, the MCU includes receiving unit, processing unit and compensating unit；

The receiving unit, for receiving view data to be shown, described image data include N number of picture of a two field picture The GTG of element, N are more than 1；

The data table memory, for storing offset data table；

The processing unit, for for each pixel in N number of pixel, performing following steps：

Determine the display subregion belonging to pixel；

The GTG for showing subregion and described image pixel according to belonging to the pixel, inquires about default offset data Table, determines the corresponding offset of the pixel；

The compensating unit, for being mended to the GTG of the pixel according to the offset of the pixel determined Repay.

Wherein, each display subregion is provided with each self-corresponding compensation of every kind of GTG in the offset data table Value；The display subregion of the pixel, refers to the viewing area of a two field picture is obtained according to the regular partition of setting.

The gray level compensation method and device of the view data that above-described embodiment is provided, including：Receive picture number to be shown According to described image data include the GTG of N number of pixel of a two field picture, and N is more than 1；For each picture in N number of pixel Element, determines the display subregion belonging to pixel；The ash for showing subregion and described image pixel according to belonging to the pixel Rank, inquires about default offset data table, determines the corresponding offset of the pixel；According to the compensation of the pixel determined Value is compensated to the GTG of the pixel, first, is measured by data, is set up offset data table, according to the compensation number set up According to table, correction is compensated to the luma data of display screen actual displayed, so as to realize any viewing area of whole display floater The flicker optimization in domain, and then eliminate the flicker that whole display floater is produced.

Description of the drawings

For the technical scheme being illustrated more clearly that in the embodiment of the present invention, below will be to making needed for embodiment description Accompanying drawing is briefly introduced, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for this For the those of ordinary skill in field, without having to pay creative labor, can be obtaining which according to these accompanying drawings His accompanying drawing.

Fig. 1 be prior art in display floater design 4 public electrodes structural representation；

Fig. 2 is the structural representation that the viewing area of display floater A is subdivided into n display subregion；

Fig. 3 is the storage schematic diagram of the every kind of GTG storage identical offset for each display subregion；

Fig. 4 is different for every kind of GTG storage of each display subregion for the binary data that grey decision-making is 8 bits The storage schematic diagram of offset；

Fig. 5 is that the viewing area of display floater B is subdivided into 3 by viewing area according to the impartial mode of area to show son The structural representation in region；

Fig. 6 a～Fig. 6 b provide the square wave configuration schematic diagram of pixel C, pixel D before and after compensation for the embodiment of the present invention；

Fig. 7 a～Fig. 7 b provide the square wave configuration schematic diagram of pixel E, pixel F before and after compensation for the embodiment of the present invention；

Fig. 8 a～Fig. 8 b provide the square wave configuration schematic diagram of pixel G, pixel H before and after compensation for the embodiment of the present invention；

Fig. 9 is the flow chart of the gray level compensation method of view data provided in an embodiment of the present invention；

Figure 10 a～Figure 10 c are the structural representation of the gray scale compensation device of view data provided in an embodiment of the present invention.

Specific embodiment

In order that the object, technical solutions and advantages of the present invention are clearer, below in conjunction with accompanying drawing the present invention is made into One step ground is described in detail, it is clear that described embodiment is only a part of embodiment of the invention, rather than the enforcement of whole Example.Based on the embodiment in the present invention, what those of ordinary skill in the art were obtained under the premise of creative work is not made All other embodiment, belongs to the scope of protection of the invention.

In the embodiment of the present invention, offset data table can be pre-configured with, the offset data table is for image to be shown Data are compensated.

The offset stored in offset data table is relevant with the display subregion of display floater, wherein：Display floater it is aobvious Show that subregion refers to the region being finely divided according to the rule of setting to viewing area on a display panel.

In offset data table, the offset in the i-th display subregion corresponding to jth GTG is obtained in the following manner, 1≤ I≤X, 1≤j≤Y, X are the quantity for showing subregion, and Y is the quantity of GTG：

Under the different voltages for showing the public electrode corresponding to subregion of display floater central area, measurement should Show that subregion shows the display effect of middle GTG, obtain the first voltage value of public electrode during optimal display result；

Under the i-th different voltages for showing the public electrode corresponding to subregion, measurement i-th shows that subregion shows jth The display effect of GTG, obtains the second voltage value of public electrode during optimal display result；

According to the first voltage value and the second voltage value, the corresponding benefit of jth GTG in the i-th display subregion is determined Repay value.

For example, the mode for averagely dividing according to the area of the viewing area of display floater is by the viewing area on display floater A Domain is subdivided into the structural representation of n display subregion, and can be found in Fig. 2, i.e. Fig. 2 is to segment the viewing area of display floater A Into the structural representation of n display subregion.As shown in Fig. 2 by the viewing area of display floater according to viewing area area N display subregion is divided equally into, this n shows that subregion respectively shows subregion 1, shows subregion 2, shows sub-district Domain 3, display subregion (n-2), display subregion (n-1) and display subregion n.

After the viewing area of display floater is finely divided to show subregion according to the rule of setting, for each Show that every kind of GTG of subregion can store identical offset, it is also possible to store different offsets.Give separately below Introduce：

First, for every kind of GTG storage identical offset of each display subregion in offset data table.

After be finely divided the viewing area of display floater A according to the rule of setting, i.e. base After the viewing area by display floater shown in Fig. 2 is divided equally into n display subregion according to the area of viewing area, The structural representation of identical offset can be stored for every kind of GTG of each display subregion, Fig. 3 is can be found in.That is Fig. 3 It is the storage schematic diagram of the every kind of GTG storage identical offset for each display subregion.As shown in figure 3, for showing The offset of the every kind of GTG storage in subregion 1 is a₀, show that the offset of the every kind of GTG storage in subregion 2 is a₁；The offset of the every kind of GTG storage in display subregion 3 is a₂；Every kind of GTG storage in display subregion (n-2) Offset is a_(n-2)；The offset of the every kind of GTG storage in display subregion (n-1) is a_(n-1)And show subregion The offset of the every kind of GTG storage in n is a_n。

For example, by taking the binary data that grey decision-making is 8 bits as an example, then based on Fig. 2 and Fig. 3 on the basis of, show sub-district The offset of 256 kinds of GTGs in domain 1 is a₀, show that the offset of 256 kinds of GTGs in subregion 2 is a₁, show sub-district The offset of 256 kinds of GTGs in domain 3 is a₂, show that the offset of 256 kinds of GTGs in subregion (n-2) is a_(n-2)、 The offset of 256 kinds of GTGs in display subregion (n-1) is a_(n-1), show subregion n in 256 kinds of GTGs offset It is a_n。

2nd, different offsets are stored for every kind of GTG of each display subregion in offset data table.

After be finely divided the viewing area of display floater according to the rule of setting, i.e. base After the viewing area by display floater shown in Fig. 2 is divided equally into n display subregion according to the area of viewing area, For the different offset that every kind of GTG of each display subregion can be stored.

For example, by taking the binary data that grey decision-making is 8 bits as an example, then display floater is carried out carefully based on shown in Fig. 2 On the basis of being divided into n display subregion, the storage of different offsets is stored for every kind of GTG of each display subregion Schematic diagram, can be found in Fig. 4.That is Fig. 4 is directed to every kind of GTG of each display subregion for the binary data that grey decision-making is 8 bits The storage schematic diagram of the different offset of storage.

As shown in figure 4, the offset for showing the 1st kind of GTG LI storage in subregion 1 is X11, shows subregion 1 In the 2nd kind of GTG L2 storage offset be X12, show subregion 1 in the 3rd kind of GTG L3 storage offset be X13, The offset of the 4th kind of GTG L4 storage in display subregion 1 is that X14 ... shows that the 127th kind of GTG L127 in subregion 1 is deposited The offset of storage shows that for X1127 ... the offset of the 255th kind of GTG L255 storage in subregion 1 is X1255 and display The offset of the 256th kind of GTG L256 storage in subregion 1 is X1256.

As shown in figure 4, the offset for showing the 1st kind of GTG LI storage in subregion 2 is X21, shows subregion 2 In the 2nd kind of GTG L2 storage offset be X22, show subregion 2 in the 3rd kind of GTG L3 storage offset be X23, The offset of the 4th kind of GTG L4 storage in display subregion 2 is that X24 ... shows that the 127th kind of GTG L127 in subregion 2 is deposited The offset of storage shows that for X2127 ... the offset of the 255th kind of GTG L255 storage in subregion 2 is X2255 and display The offset of the 256th kind of GTG L256 storage in subregion 2 is X2256.

As shown in figure 4, the offset for showing the 1st kind of GTG LI storage in subregion 3 is X31, shows subregion 3 In the 2nd kind of GTG L2 storage offset be X32, show subregion 3 in the 3rd kind of GTG L3 storage offset be X33, The offset of the 4th kind of GTG L4 storage in display subregion 3 is that X34 ... shows that the 127th kind of GTG L127 in subregion 3 is deposited The offset of storage shows that for X3127 ... the offset of the 255th kind of GTG L255 storage in subregion 3 is X3255 and display The offset of the 256th kind of GTG L256 storage in subregion 3 is X3256.

As shown in figure 4, the offset for showing the 1st kind of GTG LI storage in subregion n is Xn1, shows subregion n In the 2nd kind of GTG L2 storage offset be Xn2, show subregion n in the 3rd kind of GTG L3 storage offset be Xn3, The offset of the 4th kind of GTG L4 storage in display subregion n is that Xn4 ... shows that the 127th kind of GTG L127 in subregion n is deposited The offset of storage shows that for Xn127 ... the offset of the 255th kind of GTG L255 storage in subregion n is Xn255 and display The offset of the 256th kind of GTG L256 storage in subregion n is Xn256.

Below by several examples, to calculating the backoff algorithm of the offset stored in offset data table and according to compensation The offset of tables of data is compensated using which kind of compensation way to the data to be displayed for receiving and carries out detailed explanation.

【Citing 1】

By example 1, the calculation i.e. two kind backoff algorithm of the offset of offset data table storage is illustrated：

The grey decision-making being related in assuming the example is by taking the binary data that grey decision-making is 8 bits as an example.

It is further assumed that the viewing area of display floater B is subdivided into 3 by viewing area according to the impartial mode of area The structural representation of subregion is shown, Fig. 5 is can be found in.That is Fig. 5 is according to the impartial side of area by the viewing area of display floater B Viewing area is subdivided into formula the structural representation of 3 display subregions.As shown in figure 5, the viewing area of display floater B is pressed Viewing area is subdivided into 3 and shows that subregion is respectively by the mode of product of showing up equalization：Show subregion 1, show subregion 2 with And show subregion 3.Wherein, show display subregion of the subregion 2 for the central area of display floater B.

Under the different voltages of the public electrode shown corresponding to subregion 2, measurement shows that subregion 2 shows middle GTG The display effect of (the 127th kind of GTG or the 128th kind of GTG), obtains the common electrical of subregion 2 is shown during optimal display result First voltage value V1 of the magnitude of voltage of pole as the public electrode for showing subregion 2, it is assumed that the value of V1 is 5v.

For the sake of for description simplicity, the calculating of the offset of the 200th kind of GTG of subregion 3 is shown in example 1 by description Method explanation shows the computational methods of the offset of every kind of GTG of subregion 3.With the binary data that grey decision-making is 8 bits it is Example, then it be then 11001000 to show that the grey decision-making binary data of the 200th kind of GTG of subregion 3 is represented.

First, under the different voltages of the public electrode shown corresponding to subregion 3, measurement shows the display of subregion 3 the Display effect during 200 kinds of GTGs, magnitude of voltage when display subregion 3 is shown the optimal display result of the 200th kind of GTG are made To show second voltage value V2 of the public electrode of subregion 3, it is assumed that the value of V2 is 6v.

Then, according to first voltage value V1 and second voltage value V2, it is determined that showing that the 200th kind of GTG institute of subregion 3 is right The offset answered, can be calculated by following two backoff algorithms：

Backoff algorithm one：Second voltage value V2 is deducted into difference DELTA V that first voltage value V1 is obtained, will be difference DELTA V institute right The grey decision-making answered as show subregion 3 the 200th kind of GTG corresponding to offset, be stored in compensation database table.

For example, in example 1, first voltage value V1 is 5V, and second voltage value V2 is 6V, then second voltage value V2 is deducted the Difference DELTA V that one magnitude of voltage V1 is obtained is 1V, it is further assumed that the corresponding grey decision-makings of Δ V=1V are 5, with grey decision-making as 8 bits Binary data as a example by, then grey decision-making 5 is represented with binary data, then for：00000101.Grey decision-making 5 is used into binary form The data 00000101 shown are stored in offset data table.

It should be noted that to being applicable not only to the first compensation way also using one calculated offset of backoff algorithm Suitable for the second compensation way or the 3rd compensation way.

On the basis of based on example 1, it is the picture number to be shown that example 2 pairs is received by specific example again below According to being how to carry out detailed explanation according to what the first compensation way was compensated.

【Citing 2】

Hypothesis receives frame view data to be shown, for the sake of describing simplicity, it is further assumed that the frame is to be shown View data only include pixel P0, GTG species of the P0 in the frame image data is 200, and pixel P0 belongs to display Subregion 3, according to the 200th kind of GTG of pixel P0, then the 200th of pixel P0 kind GTG is that grey decision-making 200 uses binary data Represent, then for：11001000.And the 200th kind of corresponding offset of GTG of the display subregion 3 stored in offset data table 00000101, both 11001000 are added with 00000101, are then obtained the pixel P0 compensation in the frame image data Grey decision-making afterwards be 205, the 205th kind of GTG of pixel P0 after compensation is that grey decision-making 205 is represented with binary data, then for： 11001101。

On the basis of based on the example above 1, below by pixel in view data gamma (gamma) voltage be 0V with 10V is before compensation and adopts the square wave schematic diagram after the compensation of the first compensation way, to the compensation effect using the first compensation way Explain.

Gamma (gamma) voltage of the pixel in hypothesis display subregion 3 is 0V and 10V.Wherein, the magnitude of voltage of pixel C For 10v, the magnitude of voltage of pixel D is 0V, shows that the magnitude of voltage of the public electrode of subregion 3 is 6v.Pixel C, pixel D and display Square wave configuration schematic diagram of the magnitude of voltage of the public electrode in region 3 before compensation, can be found in Fig. 6 a.That is Fig. 6 a are pixel C, pixel Square wave configuration schematic diagram of the magnitude of voltage of the public electrode of D and display subregion 3 before compensation.As shown in Figure 6 a, it can be seen that Before compensation, the magnitude of voltage of pixel C is 10v, and the magnitude of voltage of pixel D is 0V, therefore, before compensation, pixel C with show subregion Voltage difference between 3 optimal public electrode V2 is 4v, and between the optimal public electrode V2 of pixel D and display subregion 3 Voltage difference be 6v, it can be seen that before compensation, the magnitude of voltage of the positive voltage of pixel C and the public electrode for showing subregion 3 Between voltage difference 4v, and pixel D negative voltage and show subregion 3 public electrode magnitude of voltage between voltage difference 6v is unequal, therefore, positive voltage can be caused inconsistent with the brightness that display floater during negative voltage is produced, so as to cause display floater Produce the problem of flickering display.

On the basis of based on citing 1, it may be determined that offset is 1V, below according to the offset 1V for determining to pixel C and Pixel D is compensated respectively, then pixel C compensation after pixel be C ', and the magnitude of voltage of C ' be 11V, pixel D compensation after pixel For D ', and the magnitude of voltage of D ' is 1V.After being compensated to pixel C and pixel D according to the offset for determining, i.e. pixel C ', as Square wave configuration schematic diagram of the magnitude of voltage of the public electrode of plain D ' and display subregion 3 after compensation, can be found in Fig. 6 b.I.e. 6b is Square wave configuration schematic diagram of the magnitude of voltage of pixel C ', pixel D ' and the public electrode for showing subregion 3 after compensation.Such as Fig. 6 b institutes Show, it can be seen that after compensation, pixel C ' positive voltage and show subregion 3 public electrode magnitude of voltage between voltage Difference is 5v, and pixel D ' negative voltage and show subregion 3 public electrode magnitude of voltage between voltage difference be also 5v, Therefore, the positive voltage after compensation is consistent with the brightness that display floater during negative voltage is produced, so as to the flicker for eliminating display floater shows Show.Backoff algorithm two：Second voltage value V2 is deducted into difference DELTA V that first voltage value V1 is obtained, is 2 by the twice of difference DELTA V Grey decision-making corresponding to Δ V as show subregion 3 the 200th kind of GTG corresponding to offset, be stored in compensation database table In.

For example, this example first voltage value V1 be 5V, second voltage value V2 be 6V, then difference DELTA V be 1V, difference DELTA V Twice be 2 Δ V be 2V, it is further assumed that the corresponding grey decision-makings of Δ V=2V be 10, with the binary number that grey decision-making is 8 bits According to as a example by, then grey decision-making 10 is represented with binary data, then for：00001010.By the data of binary representation of grey decision-making 10 00001010 is stored in offset data table.

It should be noted that to being only applicable to the second compensation way or using the calculated offset of backoff algorithm Three compensation ways.

On the basis of based on example 1, it is the picture number to be shown that example 3 pairs is received by specific example again below According to being how to carry out detailed explanation according to what the second compensation way was compensated.

【Citing 3】

In example 3, assume initially that the corresponding grey decision-making of magnitude of voltage of the public electrode for showing subregion 3 is 150.

Then, it is assumed that receive frame view data to be shown, for the sake of describing simplicity, it is further assumed that the frame View data to be shown only includes pixel P0, and GTG species of the P0 in the frame image data is the 200 i.e. ash of P0 Rank value represented with binary data for 200, then for：11001000.And pixel P0 belongs to display subregion 1.According to pixel P0 Grey decision-making, judges whether the grey decision-making of P0 is more than the corresponding grey decision-making 150 of magnitude of voltage of the public electrode for showing subregion 3, by It is more than the corresponding grey decision-making 150 of magnitude of voltage of the public electrode for showing subregion 3, institute in the grey decision-making 200 of P0 in the present example It is calculated corresponding with the 200th kind of GTG employing mode two for showing subregion 3 that can be stored in offset data table Both are 11001000 Hes by 2 times of difference correspondence grey decision-makings 00001010 of the employing stored in offset, i.e. offset data table 00001010 is added, then the grey decision-making obtained after the pixel P0 compensation in the frame image data is 210, the pixel after compensation 210th GTG of P0 is that the binary data of grey decision-making 210 is represented, then for：11010010.Otherwise, if the grey decision-making of P0 is not More than show subregion 3 public electrode the corresponding grey decision-making of magnitude of voltage be P0 grey decision-making be less than or equal to display sub-district The corresponding grey decision-making of magnitude of voltage of the public electrode in domain 3, then do not compensate to pixel P0.I.e. the second compensation way is only treated aobvious The grey decision-making of the pixel in the view data shown is more than the GTG corresponding to the magnitude of voltage of the public electrode of the pixel region The luma data of value is compensated.

It should be noted that the second compensation way is only more than the picture to the grey decision-making of the pixel in view data to be shown The luma data of the grey decision-making corresponding to the magnitude of voltage of the public electrode of plain region is compensated.And to image to be shown The grey decision-making of the pixel in data is less than or equal to the grey decision-making corresponding to the magnitude of voltage of the public electrode of the pixel region Luma data do not compensate.

On the basis of based on the example above 1, below by pixel in view data gamma (gamma) voltage be 0V with 11V before compensation with compensated using the second compensation way after square wave schematic diagram, to the compensation using the second compensation way Effect is illustrated.

Gamma (gamma) voltage of the pixel in hypothesis display subregion 3 is 0V and 11V.Wherein, the magnitude of voltage of pixel E For 11v, the magnitude of voltage of pixel F is 0V, shows that the magnitude of voltage of the public electrode of subregion 3 is 6v.Pixel E, pixel F and display Square wave configuration schematic diagram of the magnitude of voltage of the public electrode in region 3 before compensation, can be found in Fig. 7 a.That is Fig. 7 a are pixel E, pixel Square wave configuration schematic diagram of the magnitude of voltage of the public electrode of F and display subregion 3 before compensation.As shown in Figure 7a, it can be seen that Before compensation, the magnitude of voltage of pixel E is 11v, and the magnitude of voltage of pixel F is 0V, pixel E and the optimal common electrical for showing subregion 3 Voltage difference between the V2 of pole is 5v, and the voltage difference between the optimal public electrode V2 of pixel F and display subregion 3 is 6v, it can be seen that before compensation, the voltage difference between the magnitude of voltage of the public electrode of the positive voltage and display subregion 3 of pixel E Voltage difference 6v between value 5v, with the negative voltage of pixel D and the magnitude of voltage of the public electrode for showing subregion 3 is unequal, because This, can cause positive voltage inconsistent with the brightness that display floater during negative voltage is produced, aobvious so as to cause display floater to produce flicker The problem shown.

On the basis of based on citing 1, it may be determined that offset is 1V, it is assumed that the grey decision-making of pixel E is located more than pixel E Grey decision-making corresponding to the magnitude of voltage 6V of the public electrode of display subregion 3, and assume that the grey decision-making of pixel F is not more than pixel F Grey decision-making corresponding to the magnitude of voltage 6V of the public electrode of the display subregion 3 at place, therefore the second compensation way can be adopted Only pixel E is compensated, i.e., only pixel E is compensated according to the offset 1V for determining, and pixel F is not compensated, Then the pixel after the compensation of pixel E is E ', and the magnitude of voltage of E ' is 12V.Pixel E is being compensated according to the offset for determining Afterwards, pixel F, pixel E after compensation ' illustrate with the square wave configuration of the magnitude of voltage after compensation of the public electrode for showing subregion 3 Figure, can be found in Fig. 7 b.That is Fig. 7 b are pixel E ', the side of the magnitude of voltage after compensation of pixel F and the public electrode for showing subregion 3 Wave structure schematic diagram.As shown in Figure 7b, it can be seen that after compensation, pixel E ' positive voltage with show subregion 3 common electrical Voltage difference between the magnitude of voltage of pole be 6v, and the negative voltage of pixel F with show subregion 3 public electrode magnitude of voltage it Between voltage difference also be 6v, therefore, the positive voltage after compensation with during negative voltage display floater generation brightness it is consistent, so as to disappear Except the flickering display of display floater.

On the basis of based on example 1, it is the picture number to be shown that example 4 pairs is received by specific example again below According to being how to carry out detailed explanation according to what the 3rd compensation way was compensated.

【Citing 4】

In example 4, assume initially that the corresponding grey decision-making of magnitude of voltage of the public electrode for showing subregion 3 is 220.

Then, it is assumed that receive frame view data to be shown, for the sake of describing simplicity, it is further assumed that the frame View data to be shown only includes pixel P1, and GTG species of the P1 in the frame image data is the 200 i.e. ash of P0 Rank value represented with binary data for 200, then for：11001000.And pixel P1 belongs to display subregion 3.According to pixel P1 Grey decision-making, judges the grey decision-making of P1 whether less than in the corresponding grey decision-making 150 of magnitude of voltage of the public electrode for showing subregion 3, Due to P1 in the present example grey decision-making 200 more than the public electrode for showing subregion 3 the corresponding grey decision-making 220 of magnitude of voltage, So can be by the 200th kind of two calculated correspondence of GTG employing mode of the display subregion 3 stored in offset data table Offset, i.e., both are 11001000 by 2 times of differences of the employing for being stored in offset data table correspondence grey decision-makings 00001010 It is added with 00001010, then the grey decision-making obtained after the pixel P0 compensation in the frame image data is 210, the picture after compensation 210th GTG of plain P0 is that the binary data of grey decision-making 210 is represented, then for：11010010.Otherwise, if the grey decision-making of P1 not Less than show subregion 3 public electrode the corresponding grey decision-making of magnitude of voltage be P1 grey decision-making be greater than or equal to display sub-district The corresponding grey decision-making of magnitude of voltage of the public electrode in domain 3, then do not compensate to pixel P1.I.e. the 3rd compensation way only treats aobvious The grey decision-making of the pixel in the view data shown is less than the GTG corresponding to the magnitude of voltage of the public electrode of the pixel region The luma data of value is compensated.

It should be noted that the 3rd compensation way is only less than the picture to the grey decision-making of the pixel in view data to be shown The luma data of the grey decision-making corresponding to the magnitude of voltage of the public electrode of plain region is compensated.And to image to be shown The grey decision-making of the pixel in data is more than or equal to the grey decision-making corresponding to the magnitude of voltage of the public electrode of the pixel region Luma data do not compensate.

On the basis of based on the example above 1, below by pixel in graph data gamma (gamma) voltage be 0V with 11V before compensation with compensated using the 3rd compensation way after square wave schematic diagram, to the compensation using the 3rd compensation way Effect is explained.

Gamma (gamma) voltage of the pixel in hypothesis display subregion 3 is 0V and 11V.Wherein, the magnitude of voltage of pixel G For 11v, the magnitude of voltage of pixel H is 0V, shows that the magnitude of voltage of the public electrode of subregion 3 is 6v.Pixel G, pixel H and display Square wave configuration schematic diagram of the magnitude of voltage of the public electrode in region 3 before compensation, can be found in Fig. 8 a.That is Fig. 8 a are pixel G, pixel Square wave configuration schematic diagram of the magnitude of voltage of the public electrode of H and display subregion 3 before compensation.As shown in Figure 8 a, it can be seen that Before compensation, the magnitude of voltage of pixel G is 11v, and the magnitude of voltage of pixel H is 0V, pixel G and the optimal common electrical for showing subregion 3 Voltage difference between the V2 of pole is 5v, and the voltage difference between the optimal public electrode V2 of pixel H and display subregion 3 is 6v, it can be seen that before compensation, the voltage difference between the magnitude of voltage of the public electrode of the positive voltage and display subregion 3 of pixel G Voltage difference 6v between value 5v, with the negative voltage of pixel H and the magnitude of voltage of the public electrode for showing subregion 3 is unequal, because This, can cause positive voltage inconsistent with the brightness that display floater during negative voltage is produced, aobvious so as to cause display floater to produce flicker The problem shown.

On the basis of based on citing 1, it may be determined that offset is 1V, it is assumed that the grey decision-making of H is less than the display that pixel H is located Grey decision-making corresponding to the magnitude of voltage 6V of the public electrode of subregion 3, and assume the grey decision-making of pixel G not less than in pixel F institute Display subregion 3 public electrode magnitude of voltage 6V corresponding to grey decision-making, therefore therefore can be using the 3rd benefit Repay mode only to compensate pixel H, i.e., only pixel H is compensated according to the offset 1V for determining, and pixel G is not carried out Compensation, then the pixel after the compensation of pixel H is H ', and the magnitude of voltage of H ' is 1V.Pixel H is being mended according to the offset for determining After repaying, pixel H after pixel G, compensation ' show with the square wave configuration of the magnitude of voltage after compensation of the public electrode of display subregion 3 It is intended to, can be found in Fig. 8 b.That is Fig. 8 b are pixel G, pixel H after compensation ' exist with the magnitude of voltage of public electrode for showing subregion 3 Square wave configuration schematic diagram after compensation.As shown in Figure 8 b, it can be seen that after compensation, the positive voltage of pixel G and display subregion Voltage difference between the magnitude of voltage of 3 public electrode is 5v, and pixel H after compensating ' negative voltage with show subregion 3 Voltage difference between the magnitude of voltage of public electrode is also 5v, therefore, the positive voltage after compensation is produced with display floater during negative voltage Raw brightness is consistent, so as to eliminate the flickering display of display floater.

Further, in order to increase compensation way it is flexible to, when the GTG to view data is compensated, can be by First compensation way, the second compensation way and the 3rd compensation way are used in mixed way.

【Citing 5】

It is the view data to be shown that example 5 pairs is received is how to mend according to mixing below by a specific example That repays that mode i.e. the first compensation way, the second compensation way and the 3rd compensation way compensate carries out detailed explaining It is bright.

Viewing area is subdivided into into 3 according to area impartial mode based on the viewing area by display floater B shown in Fig. 4 On the basis of the individual structural representation for showing subregion.

First, under the different voltages of the public electrode shown corresponding to subregion 2, during measurement shows that subregion 2 shows Between GTG (the 127th kind of GTG or the 128th kind of GTG) display effect, obtain during optimal display result, showing subregion 2 First voltage value V1 of the magnitude of voltage of public electrode as the public electrode for showing subregion 2, it is assumed that the value of V1 is 5v.

Under the different voltages of the public electrode shown corresponding to subregion 3, measurement shows that subregion 3 shows the 100th kind Display effect during GTG, magnitude of voltage when will show that subregion 3 shows the optimal display result of the 100th kind of GTG is used as display Third voltage value V3 of the public electrode of subregion 3, it is assumed that the value of V3 is 3v.

Under the different voltages of the public electrode shown corresponding to subregion 3, measurement shows that subregion 3 shows the 200th kind Display effect during GTG, magnitude of voltage when will show that subregion 3 shows the optimal display result of the 200th kind of GTG is used as display 4th magnitude of voltage V4 of the public electrode of subregion 3, it is assumed that the value of V4 is 6v.

Under the different voltages of the public electrode shown corresponding to subregion 3, measurement shows that subregion 3 shows the 220th kind Display effect during GTG, magnitude of voltage when will show that subregion 3 shows the optimal display result of the 220th kind of GTG is used as display 5th magnitude of voltage V5 of the public electrode of subregion 3, it is assumed that the value of V5 is 7v.

Then, according to first voltage value V1 and third voltage value V3, it is determined that showing that the 100th kind of GTG institute of subregion 3 is right The offset answered, can pass through backoff algorithm one and be calculated the 100th kind of offset corresponding to GTG for showing subregion 2, i.e., Third voltage value V3 is deducted into difference DELTA V that first voltage value V1 is obtained, the grey decision-making corresponding to difference DELTA V is sub as showing The 100th kind of offset corresponding to GTG in region 3, is stored in compensation database table.

For example, in example 5, first voltage value V1 is 5V, and third voltage value V3 is 3V, then difference DELTA V is (- 2) V, further Assume that the corresponding grey decision-makings of Δ V=-2V are 2, by taking the binary data that grey decision-making is 8 bits as an example, then grey decision-making 2 uses binary system Data represent, then for：00000010.Grey decision-making 2 is stored in offset data table with the data 00000010 of binary representation.

According to first voltage value V1 and the 4th magnitude of voltage V4, it is determined that showing the 200th kind of benefit corresponding to GTG of subregion 3 Value is repaid, backoff algorithm one can be passed through and be calculated the 200th kind of offset corresponding to GTG for showing subregion 2, will the 4th Magnitude of voltage V4 deducts difference DELTA V that first voltage value V1 is obtained, using the grey decision-making corresponding to difference DELTA V as display subregion 3 The 200th kind of offset corresponding to GTG, be stored in compensation database table.

For example, in example 5, first voltage value V1 is 5V, and the 4th magnitude of voltage V3 is 6V, then difference DELTA V is 1V, further false If the corresponding grey decision-makings of Δ V=1V are 5, by taking the binary data that grey decision-making is 8 bits as an example, then grey decision-making 5 uses binary number According to expression, then for：00000101.Grey decision-making 5 is stored in offset data table with the data 00000101 of binary representation.

According to first voltage value V1 and the 5th magnitude of voltage V5, it is determined that showing the 220th kind of benefit corresponding to GTG of subregion 3 Value is repaid, backoff algorithm one can be passed through and be calculated the 220th kind of offset corresponding to GTG for showing subregion 2, will the 5th Magnitude of voltage V5 deducts difference DELTA V that first voltage value V1 is obtained, using the grey decision-making corresponding to difference DELTA V as display subregion 3 The 220th kind of offset corresponding to GTG, be stored in compensation database table.

For example, in example 5, first voltage value V1 is 5V, and the 5th magnitude of voltage V5 is 7V, then difference DELTA V is 2V, further false If the corresponding grey decision-makings of Δ V=2V are 10, by taking the binary data that grey decision-making is 8 bits as an example, then grey decision-making 10 uses binary system Data represent, then for：00001010.Grey decision-making 10 is stored in offset data table with the data 00001010 of binary representation.

It is further assumed that showing that the corresponding grey decision-making of magnitude of voltage of the public electrode of subregion 3 is 150.

Hypothesis receives frame view data to be shown, for the sake of describing simplicity, it is further assumed that the frame is to be shown View data only include three pixels P2, P3, P4, and pixel P2, P3, P4 belong to display subregion 3.

It is further assumed that GTG species of the P2 in the frame image data is the 200 i.e. grey decision-making of P2 is 200, entered with two Data processed represent, then for：11001000.GTG species of the P3 in the frame image data is that the 220 i.e. grey decision-making of P3 is 220, Represented with binary data, then for：11011100.GTG species of the P4 in the frame image data is the 100 i.e. grey decision-making of P4 For 100, represented with binary data, then for：01100010.

It is further assumed that P2 is compensated using the first compensation way, P3 is compensated using the second compensation way, and P4 is adopted Compensated with the 3rd compensation way.

As pixel P2 is compensated using the first compensation way, then can be according to the 200th of pixel P2 the kind of GTG and benefit Data 00000101 of the grey decision-making 5 stored in repaying tables of data with binary representation, by grey decision-making 200+5=205, will 11001000 be added with the offset data 00000101 stored in offset data table after be compensated after grey decision-making 205, the data of binary representation of grey decision-making 205, then for：11001101.

As pixel P3 is compensated using second compensation way, then grey decision-making first according to pixel P3, judges P3's Grey decision-making whether more than the corresponding grey decision-making 150 of magnitude of voltage of the public electrode for showing subregion 3, due to P3's in the present example Magnitude of voltage corresponding grey decision-making 150 of the grey decision-making 220 more than the public electrode for showing subregion 3, then to depositing in offset data table The data 5 that stored of 220th kind of GTG of the display subregion 3 of storage, and offset value calculation 5 is multiplied by corresponding to 2 i.e. 5*2=10 Offset, 10 are represented with binary data, then for：00001010.Then the data stored in offset data table are calculated i.e. It is multiplied by the offset 10 obtained after 2 to be added with the grey decision-making of pixel P3,220+10=230 will 11011100 Hes 00001010 be added after be compensated after grey decision-making 230, the data of binary representation of grey decision-making 230, then for： 11100110。

As pixel P4 is compensated using the third compensation way, then grey decision-making first according to pixel P4, judges P4's Grey decision-making whether less than the corresponding grey decision-making 150 of magnitude of voltage of the public electrode for showing subregion 3, due to P4's in the present example Magnitude of voltage corresponding grey decision-making 150 of the grey decision-making 100 less than the public electrode for showing subregion 3, then to depositing in offset data table The data 1 that stored of 100th kind of GTG of the display subregion 3 of storage, and offset value calculation 1 is multiplied by corresponding to 2 i.e. 1*2=2 Offset, 2 are represented with binary data, then for：00000010.Then the data stored in offset data table are calculated and is taken advantage of It is added with the grey decision-making of pixel P4 with 2 offsets 2 for obtaining later, 100+2=102 will 01100010 He 00000010 be added after be compensated after grey decision-making 102, the data of binary representation of grey decision-making 102, then for： 01100100。

In order to increase the motility of offset data data storage, can also store in offset data table for each display sub-district Domain and every kind of GTG, the ash being provided with corresponding to the optimal public electrode voltage value when display subregion shows this kind of GTG Rank is worth, wherein, in the i-th display subregion, the corresponding optimal public electrode voltage value of jth GTG is to show subregion institute i-th Under the different voltages of corresponding public electrode, measurement i-th shows that subregion shows the display effect of jth GTG, is most preferably shown The magnitude of voltage of public electrode when showing effect.

Viewing area is subdivided into into 3 according to area impartial mode based on the viewing area by display floater B shown in Fig. 4 Individual display subregion：On the basis of showing subregion 1, display subregion 2 and showing subregion 3.

Under the different voltages of the public electrode shown corresponding to subregion 2, measurement shows that subregion 2 shows middle GTG The display effect of (the 127th kind of GTG or the 128th kind of GTG), obtains the common electrical of subregion 2 is shown during optimal display result Sixth magnitude of voltage V6 of the magnitude of voltage of pole as the public electrode for showing subregion 2, it is assumed that the value of V6 is 10v, and determines V6's Grey decision-making corresponding to value 10v, it is assumed that the first grey decision-making of grey decision-making corresponding to value 10v of V6 is 10.

For the sake of for description simplicity, the computational methods explanation of the offset by describing the 100th kind of GTG for showing subregion 1 Show the computational methods of the offset of every kind of GTG of subregion 1.

Under the different voltages of the public electrode shown corresponding to subregion 1, measurement shows that subregion 1 shows the 100th kind Display effect during GTG, magnitude of voltage when will show that subregion 1 shows the optimal display result of the 100th kind of GTG is used as display 7th magnitude of voltage V7 of the public electrode of subregion 1, it is assumed that the value of V7 is 8v, then be stored in the grey decision-making corresponding to value 8v of V7 In offset data table, it is assumed that the second grey decision-making of grey decision-making corresponding to value 8v of V7 is 8.

According to the first grey decision-making and the second grey decision-making, the view data to be shown to receiving is compensated Plant compensation way to be respectively：4th compensation way, the 5th compensation way and the 6th compensation way.

4th compensation way：

Hypothesis receives frame view data to be shown, for the sake of describing simplicity, it is further assumed that the frame is to be shown View data only include pixel P9, and grey decision-makings of the P9 in the frame image data is 100, and pixel P9 belongs to display Subregion 1, then, when compensating to pixel P9, read the second GTG for showing subregion 1 first from offset data table Value 8, and the first grey decision-making 10 of 8 and the public electrode of display subregion 2 is sought into difference, the second grey decision-making is obtained grey with first Difference -2 of machine value, are then compensated with 100 GTGs of GTG -2 pairs of pixels P9 of difference, and -2+100=98, i.e. pixel P9 are mended GTG after repaying is 98.

5th compensation way：

Hypothesis shows that the corresponding grey decision-making of magnitude of voltage of the public electrode of subregion 1 is 50.

Hypothesis receives frame view data to be shown, for the sake of describing simplicity, it is further assumed that the frame is to be shown View data only include pixel P10, and grey decision-makings of the P10 in the frame image data is 100, and pixel P10 belongs to Subregion 1 is shown, then, when compensating to pixel P10, the grey decision-making for P10 first being judged according to the grey decision-making of pixel P10 is whether More than the corresponding grey decision-making 50 of magnitude of voltage of the public electrode for showing subregion 1, due to the grey decision-making 100 of P10 in the present example More than the corresponding grey decision-making 50 of magnitude of voltage of the public electrode for showing subregion 1, then read from offset data table and show son Second grey decision-making 8 in region 1, and seek difference with the first grey decision-making 10 of public electrode for showing subregion 2 by 8, is obtained the GTG difference (- 2) is multiplied by 2 i.e. (- 2) * 2=(- 4) by the difference (- 2) of two grey decision-makings and the first grey machine value, with obtaining after calculating GTG difference 100 GTGs of pixel P10 are compensated, (- 4)+100=96, i.e. pixel P10 compensation after GTG be 96. Otherwise, if the grey decision-making of P10 no more than shows that the corresponding grey decision-making of magnitude of voltage of the public electrode of subregion 1 is the GTG of P10 Value is less than or equal to the corresponding grey decision-making of magnitude of voltage of the public electrode for showing subregion 1, then pixel P10 is not mended Repay.That is the 5th compensation way is only public more than the pixel region to the grey decision-making of the pixel in view data to be shown The luma data of the grey decision-making corresponding to the magnitude of voltage of electrode is compensated.

It should be noted that the 5th compensation way is only more than the picture to the grey decision-making of the pixel in view data to be shown The luma data of the grey decision-making corresponding to the magnitude of voltage of the public electrode of plain region is compensated.And to image to be shown The grey decision-making of the pixel in data is less than or equal to the grey decision-making corresponding to the magnitude of voltage of the public electrode of the pixel region Luma data do not compensate.

6th compensation way：

Hypothesis shows that the corresponding grey decision-making of magnitude of voltage of the public electrode of subregion 1 is 150.

Hypothesis receives frame view data to be shown, for the sake of describing simplicity, it is further assumed that the frame is to be shown View data only include pixel P11, and grey decision-makings of the P11 in the frame image data is 100, and pixel P10 belongs to Subregion 1 is shown, then, when compensating to pixel P10, the grey decision-making for P10 first being judged according to the grey decision-making of pixel P10 is whether Less than the corresponding grey decision-making 150 of magnitude of voltage of the public electrode for showing subregion 1, due to the grey decision-making 100 of P10 in the present example Less than the corresponding grey decision-making 150 of magnitude of voltage of the public electrode for showing subregion 1, then read from offset data table and show son Second grey decision-making 8 in region 1, and seek difference with the first grey decision-making 10 of public electrode for showing subregion 2 by 8, is obtained the GTG difference (- 2) is multiplied by 2 i.e. (- 2) * 2=(- 4) by the difference (- 2) of two grey decision-makings and the first grey machine value, with obtaining after calculating GTG difference 100 GTGs of pixel P10 are compensated, (- 4)+100=96, i.e. pixel P10 compensation after GTG be 96. Otherwise, if the grey decision-making of P10 is not less than the GTG that the corresponding grey decision-making of magnitude of voltage of the public electrode for showing subregion 1 is P10 Value is greater than or equal to the corresponding grey decision-making of magnitude of voltage of the public electrode for showing subregion 1, then pixel P10 is not mended Repay.That is the 6th compensation way is only public less than the pixel region to the grey decision-making of the pixel in view data to be shown The luma data of the grey decision-making corresponding to the magnitude of voltage of electrode is compensated.

It should be noted that the 6th compensation way is only less than the picture to the grey decision-making of the pixel in view data to be shown The luma data of the grey decision-making corresponding to the magnitude of voltage of the public electrode of plain region is compensated.And to image to be shown The grey decision-making of the pixel in data is more than or equal to the grey decision-making corresponding to the magnitude of voltage of the public electrode of the pixel region Luma data do not compensate.

Similar first compensation way of the mixing application of the 4th compensation way, the 5th compensation way and the 6th compensation way, The mixing application of the second compensation way and the 3rd compensation way, here are no longer illustrated.

Based on the data stored in above-mentioned offset data table, the embodiment of the present invention provides a kind of gray scale compensation of view data Method.

Fig. 9, is the flow chart of the gray level compensation method of view data provided in an embodiment of the present invention.As shown in figure 9, the party Method may include：

S901, reception view data to be shown, described image data include the GTG of N number of pixel of a two field picture, and N is big In 1.

S902, for each pixel in N number of pixel, go to step S903.

S903, determine display subregion belonging to pixel.It is determined that after display subregion belonging to pixel, going to step S904。

S904, the GTG for showing subregion and described image pixel according to belonging to the pixel, inquire about default benefit Tables of data is repaid, the corresponding offset of the pixel is determined.After the corresponding offset of the pixel is determined, step is gone to S905。

Wherein, each display subregion is provided with each self-corresponding compensation of every kind of GTG in the offset data table Value；The display subregion of the pixel, refers to the viewing area of a two field picture is obtained according to the regular partition of setting.

Further, the GTG of all kinds for arranging for each display subregion in the offset data table is corresponding Offset can be the same or different.

The offset of the pixel that S905, basis are determined is compensated to the GTG of the pixel.

In addition, to prevent the image data illumination mutation after compensating uneven, in the offset pair according to described image data After described image data are compensated, the first pixel after compensating is can also be for, if in the adjacent picture of first pixel There is the second pixel for meeting first condition in element, then judge the grey decision-making after first pixel compensation and second pixel Whether the absolute value of the difference of the grey decision-making after compensation is more than given threshold, if so, then to the ash after first pixel compensation Rank value is adjusted, between reducing the grey decision-making after the first pixel adjustment and the grey decision-making after second pixel compensation Difference absolute value；Wherein, the first condition is：Grey decision-making before second pixel compensation is mended with first pixel Grey decision-making before repaying is equal.

For example, pixel P5 in a frame image data is adjacent with P6, and grey decision-makings of the P5 with P6 before compensation is identical, For 200.The offset of pixel P5 is 2 GTGs, and the offset of pixel P6 is 20 GTGs, then after compensating, the grey decision-making of pixel P5 is 202, after compensation, the grey decision-making of pixel P6 is 220, it is assumed that grey decision-making and pixel of the threshold value for setting as 5, then after pixel P5 is compensated The absolute value of the difference of the grey decision-making after P6 compensation is 18, as 18 more than the threshold value 5 for setting, then to the ash after the compensation of pixel 5 Rank value is adjusted, for example, the grey decision-making of pixel 5 is adjusted to 18.

To prevent the image data illumination mutation after compensating uneven, in the offset according to described image data to the figure Before compensating as data, it is after the first pixel determines offset, if deposited in the neighbor of first pixel Meet the second pixel of second condition, then judge the offset of first pixel and the difference of the offset of second pixel Whether the absolute value of value is more than given threshold, and if so, then the offset of first pixel is adjusted, to reduce described the The absolute value of the difference between offset and the offset of second pixel after the adjustment of one pixel；Wherein, the Article 2 Part is：Grey decision-making before second pixel compensation is equal with the grey decision-making before first pixel compensation.

For example, pixel P7 in a frame image data is adjacent with P8, and grey decision-makings of the P7 with P8 before compensation is identical, For 200.The offset for determining pixel P7 is 2 GTGs, and the offset of pixel P8 is 20 GTGs, then the offset and picture of pixel P7 18 GTG of absolute value of the difference of the offset of plain P8, it is assumed that the threshold value for setting then can be adjusted to the offset of pixel P7 as 5 It is whole, for example, the offset of pixel P7 is adjusted to into 18 GTGs.

Furthermore it is possible to compensate to view data to be shown in application end, such as the application end of mobile phone；Can also be The integrated drive electronics part of panel is compensated to view data to be shown.

The gray level compensation method of the view data that above-described embodiment is provided, including：View data to be shown is received, it is described View data includes the GTG of N number of pixel of a two field picture, and N is more than 1；For each pixel in N number of pixel, it is determined that picture Display subregion belonging to element；The GTG for showing subregion and described image pixel according to belonging to the pixel, inquiry are pre- If offset data table, determine the corresponding offset of the pixel；According to the offset of the pixel determined to described The GTG of pixel is compensated, and first, is measured by data, is set up offset data table, according to the offset data table set up, to aobvious The luma data of display screen actual displayed compensates correction, so as to realize any viewing area of whole display floater flicker most Goodization, and then eliminate the flicker that whole display floater is produced.And it is different according to the offset stored in tables of data, can have not Same compensation way, compensates more flexible.Additionally, can also enter after the view data to receiving is compensated or before compensation Row smoothing processing, so as to the problem for preventing the jump in brightness produced after compensating uneven.

Based on identical technology design, the embodiment of the present invention also provides a kind of gray scale compensation device of view data, the figure As the executable said method embodiment of the gray scale compensation device of data.

Figure 10 a, are the structural representation of the gray scale compensation device of view data provided in an embodiment of the present invention.Such as Figure 10 a Shown, the device may include：Micro-control module MCU11 and data table memory 12；Wherein, MCU11 include receiving unit 101, Processing unit 102 and compensating unit 103；

Receiving unit 101, for receiving view data to be shown, described image data include N number of picture of a two field picture The GTG of element, N are more than 1；

Data table memory 12, for storing offset data table；

Processing unit 102, for for each pixel in N number of pixel, performing following steps：

Determine the display subregion belonging to pixel；

The GTG for showing subregion and described image pixel according to belonging to the pixel, inquires about default offset data Table, determines the corresponding offset of the pixel；

Compensating unit 103, for being compensated to the GTG of the pixel according to the offset of the pixel determined.

Wherein, each display subregion is provided with each self-corresponding compensation of every kind of GTG in the offset data table Value；The display subregion of the pixel, refers to the viewing area of a two field picture is obtained according to the regular partition of setting.

Preferably, showing that subregion is referred on liquid crystal module LCM display floater to viewing area according to the rule for setting The region being finely divided；

In the offset data table, the offset in the i-th display subregion corresponding to jth GTG is obtained in the following manner Arrive, 1≤i≤X, 1≤j≤Y, X is the quantity for showing subregion, and Y is the quantity of GTG：

Under the different voltages for showing the public electrode corresponding to subregion of display floater central area, measurement should Show that subregion shows the display effect of middle GTG, obtain the first voltage value of public electrode during optimal display result；

Under the i-th different voltages for showing the public electrode corresponding to subregion, measurement i-th shows that subregion shows jth The display effect of GTG, obtains the second voltage value of public electrode during optimal display result；

According to the first voltage value and the second voltage value, the corresponding benefit of jth GTG in the i-th display subregion is determined Repay value.

Preferably, in the offset data table, the offset in the i-th display subregion corresponding to jth GTG is：Described Two magnitudes of voltage deduct the grey decision-making corresponding to the difference that the first voltage is worth to；

Compensating unit 103, when compensating to described image data specifically for the offset according to described image data Using the first compensation way；

First compensation way is specially：

Compensated according to the first formula, first formula is：

G '=G+ Δ G

Wherein, G ' be compensation after view data in pixel grey decision-making；G is the GTG of the pixel before compensation Value, Δ G is the offset of the pixel.

Preferably, in the offset data table, the offset in the i-th display subregion corresponding to jth GTG is：Described Two magnitudes of voltage deduct the grey decision-making corresponding to the twice of the difference that the first voltage is worth to；

Compensating unit 103, specifically for compensating to described image data in the offset according to described image data The second compensation ways of Shi Caiyong or the 3rd compensation way；

Second compensation way is specifically included：

Determine the grey decision-making of pixel in described image data whether more than the pixel region public electrode electricity Grey decision-making corresponding to pressure value, if so, then compensates to the grey decision-making of the pixel according to the second formula；

3rd compensation way is specifically included：

Determine the grey decision-making of pixel in described image data whether less than the pixel region public electrode electricity Grey decision-making corresponding to pressure value, if so, then compensates to the grey decision-making of the pixel according to second formula；

Second formula is：G '=G+ Δ G '

Wherein, G ' be compensation after view data in pixel grey decision-making；G is the GTG of the pixel before compensation Value, Δ G ' is the offset inquired from the offset data table.

Preferably, in the offset data table, the offset in the i-th display subregion corresponding to jth GTG is：Described Two magnitudes of voltage deduct the grey decision-making corresponding to the difference that the first voltage is worth to；

Processing unit 102, specifically for determining the compensation way adopted for described image data；

Compensating unit 103, specifically for being compensated to described image data according to the compensation way determined, wherein：

If it is determined that adopting the first compensation way, then compensated according to the first formula, first formula is：

G '=G+ Δ G

Wherein, G ' be compensation after view data in pixel grey decision-making；G is the GTG of the pixel before compensation Value, Δ G is the offset inquired from the offset data table；

If it is determined that adopting the second compensation way, second compensation way to specifically include：

Determine the grey decision-making of pixel in described image data whether more than the pixel region public electrode electricity Grey decision-making corresponding to pressure value, if so, then compensates to the grey decision-making of the pixel according to the second formula；

If it is determined that adopting the 3rd compensation way, the 3rd compensation way to specifically include：

Determine the grey decision-making of pixel in described image data whether less than the pixel region public electrode electricity Grey decision-making corresponding to pressure value, if so, then compensates to the grey decision-making of the pixel according to second formula；

Second formula is：

G '=G+2 × Δ G '

Wherein, G ' be compensation after view data in pixel grey decision-making；G is the GTG of the pixel before compensation Value, Δ G is the offset inquired from the offset data table.

Preferably, MCU11 may also include：First smoothing processing unit 104.

10b, is that MCU11 includes receiving unit 101, processing unit 102, compensating unit 103 and the first smoothing processing list The structural representation of unit 104.

As shown in fig. lob, the first smoothing processing unit 104, in the compensating unit according to described image data After offset is compensated to described image data, for compensation after the first pixel, if in the phase of first pixel There is the second pixel for meeting first condition in adjacent pixel, then judge the grey decision-making and described second after first pixel compensation Whether the absolute value of the difference of the grey decision-making after pixel compensation is more than given threshold, if so, then to first pixel compensation after Grey decision-making be adjusted, to reduce the grey decision-making after the grey decision-making after first pixel adjustment and second pixel compensation Between difference absolute value；Wherein, the first condition is：Grey decision-making before second pixel compensation and first picture Grey decision-making before element compensation is equal.

Preferably, MCU may also include：Second smoothing processing unit 105.

10c, is that MCU11 includes receiving unit 101, processing unit 102, compensating unit 103 and the second smoothing processing list The structural representation of unit 105.

As shown in figure l oc, the second smoothing processing unit 105, in the compensating unit according to described image data Before offset is compensated to described image data, after the processing unit determines offset for the first pixel, if There is the second pixel for meeting second condition in the neighbor of first pixel, then judge the offset of first pixel Whether given threshold is more than with the absolute value of the difference of the offset of second pixel, if so, then to first pixel Offset is adjusted, to reduce the difference between offset and the offset of second pixel after the first pixel adjustment The absolute value of value；Wherein, the second condition is：Before grey decision-making before second pixel compensation and first pixel compensation Grey decision-making it is equal.

Preferably, processing unit 102, specifically for：Display subregion and described image according to belonging to the pixel The GTG of pixel, inquires about default offset data table, obtains the corresponding offset of the pixel；

Wherein, each display subregion and every kind of GTG are provided with the display sub-district in the offset data table The grey decision-making corresponding to optimal public electrode voltage value when domain shows this kind of GTG, shows that subregion is referred in liquid crystal module Region viewing area being finely divided according to the rule of setting on LCM display floaters；

In the offset data table, in the i-th display subregion, the corresponding optimal public electrode voltage value of jth GTG is, Under the i-th different voltages for showing the public electrode corresponding to subregion, measurement i-th shows that subregion shows the display of jth GTG Effect, obtains the magnitude of voltage of public electrode during optimal display result.

Preferably, processing unit 102, specifically for：

For each pixel in N number of pixel, following steps are performed：

Determine the display subregion belonging to pixel；

The GTG for showing subregion and described image pixel according to belonging to the pixel, inquires about the offset data Table；

GTG according to corresponding to the optimal public electrode voltages of the grey decision-making and display floater central area that inquire Value, determines the offset of the pixel；

Wherein, the optimal public electrode voltages of the display floater central area are measured in the following manner： Under the different voltages of the public electrode corresponding to viewing area positioned at display floater central area, measure the display subregion and show Show the display effect of middle GTG, obtain the magnitude of voltage of public electrode during optimal display result.

Preferably, compensating unit 103 is adder.

In sum, the gray level compensation method and device of view data provided in an embodiment of the present invention, including：Receive and wait to show The view data shown, described image data include the GTG of N number of pixel of a two field picture, and N is more than 1；For in N number of pixel Each pixel, determine the display subregion belonging to pixel；Display subregion and described image according to belonging to the pixel The GTG of pixel, inquires about default offset data table, determines the corresponding offset of the pixel；According to the picture determined The offset of element is compensated to the GTG of the pixel, first, is measured by data, is set up offset data table, according to foundation Offset data table, correction is compensated to the luma data of display screen actual displayed, so as to realize whole display floater appoint The flicker optimization of what viewing area, and then eliminate the flicker that whole display floater is produced.And according to storing in tables of data Offset is different, can have different compensation ways, compensates more flexible.Additionally, compensating in the view data to receiving Can also be smoothed later or before compensation, so as to the problem for preventing the jump in brightness produced after compensating uneven.

The present invention be with reference to method according to embodiments of the present invention, equipment (system), and computer program flow process Figure and/or block diagram are describing.It should be understood that can be by computer program instructions flowchart and/or each stream in block diagram The combination of journey and/or square frame and flow chart and/or flow process and/or square frame in block diagram.These computer programs can be provided The processor of general purpose computer, special-purpose computer, Embedded Processor or other programmable data processing devices is instructed to produce A raw machine so that produced for reality by the instruction of computer or the computing device of other programmable data processing devices The device of the function of specifying in present one flow process of flow chart or one square frame of multiple flow processs and/or block diagram or multiple square frames.

These computer program instructions may be alternatively stored in and can guide computer or other programmable data processing devices with spy Determine in the computer-readable memory that mode works so that the instruction being stored in the computer-readable memory is produced to be included referring to Make the manufacture of device, the command device realize in one flow process of flow chart or one square frame of multiple flow processs and/or block diagram or The function of specifying in multiple square frames.

These computer program instructions can be also loaded in computer or other programmable data processing devices so that in meter Series of operation steps is performed on calculation machine or other programmable devices to produce computer implemented process, so as in computer or The instruction performed on other programmable devices is provided for realizing in one flow process of flow chart or multiple flow processs and/or block diagram one The step of function of specifying in individual square frame or multiple square frames.

, but those skilled in the art once know basic creation although preferred embodiments of the present invention have been described Property concept, then can make other change and modification to these embodiments.So, claims are intended to be construed to include excellent Select embodiment and fall into the had altered of the scope of the invention and change.

Obviously, those skilled in the art can carry out the essence of various changes and modification without deviating from the present invention to the present invention God and scope.So, if these modifications of the present invention and modification belong to the scope of the claims in the present invention and its equivalent technologies Within, then the present invention is also intended to comprising these changes and modification.

Claims (19)

1. a kind of gray level compensation method of view data, it is characterised in that include：

View data to be shown is received, described image data include the GTG of N number of pixel of a two field picture, and N is more than 1；

For each pixel in N number of pixel, following steps are performed：

Determine the display subregion belonging to pixel；

The GTG for showing subregion and described image pixel according to belonging to the pixel, inquires about default offset data table, Determine the corresponding offset of the pixel；

The GTG of the pixel is compensated according to the offset of the pixel determined；

Wherein, each display subregion is provided with each self-corresponding offset of every kind of GTG in the offset data table；Institute State and show that subregion refers to the region being finely divided according to the rule of setting to viewing area on a display panel；Positioned at display Under the different voltages for showing the public electrode corresponding to subregion in face plate center region, measure the display subregion and show middle The display effect of GTG, obtains the first voltage value of public electrode during optimal display result, and is based on the first voltage value Obtain the offset data table.

2. the method for claim 1, it is characterised in that in the offset data table, i-th shows jth ash in subregion Offset corresponding to rank is obtained in the following manner, 1≤i≤X, 1≤j≤Y, and X is the quantity for showing subregion, and Y is GTG Quantity：

Under the i-th different voltages for showing the public electrode corresponding to subregion, measurement i-th shows that subregion shows jth GTG Display effect, obtain the second voltage value of public electrode during optimal display result；

According to the first voltage value and the second voltage value, the corresponding compensation of jth GTG in the i-th display subregion is determined Value.

3. method as claimed in claim 2, it is characterised in that in the offset data table, i-th shows jth ash in subregion Offset corresponding to rank is：The second voltage value deducts the grey decision-making corresponding to the difference that the first voltage is worth to； When being compensated to described image data according to the offset of described image data, using the first compensation way；

First compensation way is specially：

Compensated according to the first formula, first formula is：

G '=G+ Δ G

Wherein, G ' be compensation after view data in pixel grey decision-making；G be compensation before the pixel grey decision-making, Δ G It is the offset inquired from the offset data table.

4. method as claimed in claim 2, it is characterised in that in the offset data table, i-th shows jth ash in subregion Offset corresponding to rank is：The second voltage value deducts the ash corresponding to the twice of the difference that the first voltage is worth to Rank is worth；When being compensated to described image data according to the offset of described image data, using the second compensation way or the 3rd Compensation way；

Second compensation way is specifically included：

Determine the grey decision-making of pixel in described image data whether more than the pixel region public electrode magnitude of voltage Corresponding grey decision-making, if so, then compensates to the grey decision-making of the pixel according to the second formula；

3rd compensation way is specifically included：

Determine the grey decision-making of pixel in described image data whether less than the pixel region public electrode magnitude of voltage Corresponding grey decision-making, if so, then compensates to the grey decision-making of the pixel according to second formula；

Second formula is：G '=G+ Δ G '

Wherein, G ' be compensation after view data in pixel grey decision-making；G be compensation before the pixel grey decision-making, Δ G ' is the offset inquired from the offset data table.

5. method as claimed in claim 2, it is characterised in that in the offset data table, i-th shows jth ash in subregion Offset corresponding to rank is：The second voltage value deducts the grey decision-making corresponding to the difference that the first voltage is worth to；

The offset according to described image data is compensated to described image data, including：

It is determined that described image data are entered by the compensation way adopted for described image data according to the compensation way determined Row compensation, wherein：

If it is determined that adopting the first compensation way, then compensated according to the first formula, first formula is：

G '=G+ Δ G

Wherein, G ' be compensation after view data in pixel grey decision-making；G be compensation before the pixel grey decision-making, Δ G It is the offset inquired from the offset data table；

If it is determined that adopting the second compensation way, then judge whether the grey decision-making of the pixel in described image data is more than the pixel Grey decision-making corresponding to the magnitude of voltage of the public electrode of region, if so, GTG then according to the second formula to the pixel Value is compensated；

If it is determined that adopting the 3rd compensation way, then judge whether the grey decision-making of the pixel in described image data is less than the pixel Grey decision-making corresponding to the magnitude of voltage of the public electrode of region, if so, then according to second formula to the pixel Grey decision-making is compensated；

Second formula is：

G '=G+2 × Δ G

Wherein, G ' be compensation after view data in pixel grey decision-making；G be compensation before the pixel grey decision-making, Δ G It is the offset inquired from the offset data table.

6. the method as any one of claim 1 to 5, it is characterised in that the compensation according to described image data After value is compensated to described image data, also include：

The first pixel after for compensation, if exist in the neighbor of first pixel meeting the second of first condition Pixel, then judge the grey decision-making after the grey decision-making after first pixel compensation and second pixel compensation difference it is absolute Whether value is more than given threshold, if so, then the grey decision-making after first pixel compensation is adjusted, to reduce described first The absolute value of the difference between grey decision-making and the grey decision-making after second pixel compensation after pixel adjustment；Wherein, described One condition is：Grey decision-making before second pixel compensation is equal with the grey decision-making before first pixel compensation.

7. the method for claim 1, it is characterised in that the offset according to described image data is to described image Before data are compensated, also include：

Determine after offset for the first pixel, if exist in the neighbor of first pixel meeting second condition Second pixel, then judge whether the offset of first pixel is big with the absolute value of the difference of the offset of second pixel In given threshold, if so, then the offset of first pixel is adjusted, to reduce the benefit after the first pixel adjustment Repay the absolute value of the difference between the offset of value and second pixel；Wherein, the second condition is：Second pixel Grey decision-making before compensation is equal with the grey decision-making before first pixel compensation.

8. the method for claim 1, it is characterised in that the display subregion and the figure according to belonging to the pixel As the GTG of pixel, the offset of the pixel is determined, is specifically included：

The GTG for showing subregion and described image pixel according to belonging to the pixel, inquires about default offset data table, Obtain the corresponding offset of the pixel；

Wherein, for each display subregion and every kind of GTG in the offset data table, it is provided with the display subregion and shows The grey decision-making corresponding to optimal public electrode voltage value when showing this kind of GTG, shows that subregion is referred to aobvious in liquid crystal module LCM Show the region being finely divided according to the rule of setting to viewing area on panel；

In i-th display subregion, the corresponding optimal public electrode voltage value of jth GTG is to show corresponding to subregion i-th Under the different voltages of public electrode, measurement i-th shows that subregion shows the display effect of jth GTG, obtains optimal display result When the public electrode magnitude of voltage.

9. method as claimed in claim 8, it is characterised in that the default offset data table of inquiry obtains described image data Offset, specifically includes：

For each pixel in N number of pixel, following steps are performed：

Determine the display subregion belonging to pixel；

The GTG for showing subregion and described image pixel according to belonging to the pixel, inquires about the offset data table；

Grey decision-making according to corresponding to the optimal public electrode voltages of the grey decision-making and display floater central area that inquire, really The offset of the fixed pixel；

Wherein, the optimal public electrode voltages of the display floater central area are measured in the following manner：It is being located at Under the different voltages of the public electrode corresponding to the viewing area of display floater central area, measure during the display subregion shows Between GTG display effect, obtain the magnitude of voltage of public electrode during optimal display result.

10. the gray scale compensation device of a kind of view data, it is characterised in that the device includes：Micro-control module MCU and tables of data Memorizer；Wherein, the MCU includes receiving unit, processing unit and compensating unit；

The receiving unit, for receiving view data to be shown, described image data include N number of pixel of a two field picture GTG, N are more than 1；

The data table memory, for storing offset data table；

The processing unit, for for each pixel in N number of pixel, performing following steps：

Determine the display subregion belonging to pixel；

The GTG for showing subregion and described image pixel according to belonging to the pixel, inquires about default offset data table, Determine the corresponding offset of the pixel；

The compensating unit, for being compensated to the GTG of the pixel according to the offset of the pixel determined；

Wherein, each display subregion is provided with each self-corresponding offset of every kind of GTG in the offset data table；Institute State and show that subregion refers to the region being finely divided according to the rule of setting to viewing area on a display panel；Positioned at display Under the different voltages for showing the public electrode corresponding to subregion in face plate center region, measure the display subregion and show middle The display effect of GTG, obtains the first voltage value of public electrode during optimal display result, and is based on the first voltage value Obtain the offset data table.

11. devices as claimed in claim 10, it is characterised in that in the offset data table, i-th shows jth in subregion Offset corresponding to GTG is obtained in the following manner, 1≤i≤X, 1≤j≤Y, and X is the quantity for showing subregion, and Y is grey The quantity of rank：

Under the i-th different voltages for showing the public electrode corresponding to subregion, measurement i-th shows that subregion shows jth GTG Display effect, obtain the second voltage value of public electrode during optimal display result；

According to the first voltage value and the second voltage value, the corresponding compensation of jth GTG in the i-th display subregion is determined Value.

12. devices as described in right 11, it is characterised in that in the offset data table, i-th shows jth GTG in subregion Corresponding offset is：The second voltage value deducts the grey decision-making corresponding to the difference that the first voltage is worth to；

The compensating unit, adopts when compensating to described image data specifically for the offset according to described image data First compensation way；

First compensation way is specially：

Compensated according to the first formula, first formula is：

G '=G+ Δ G

Wherein, G ' be compensation after view data in pixel grey decision-making；G be compensation before the pixel grey decision-making, Δ G For the offset of the pixel.

13. devices as claimed in claim 11, it is characterised in that in the offset data table, i-th shows jth in subregion Offset corresponding to GTG is：The second voltage value is deducted corresponding to the twice of the difference that the first voltage is worth to Grey decision-making；

The compensating unit, specifically for adopting when the offset according to described image data is compensated to described image data With the second compensation way or the 3rd compensation way；

Second compensation way is specifically included：

Determine the grey decision-making of pixel in described image data whether more than the pixel region public electrode magnitude of voltage Corresponding grey decision-making, if so, then compensates to the grey decision-making of the pixel according to the second formula；

3rd compensation way is specifically included：

Determine the grey decision-making of pixel in described image data whether less than the pixel region public electrode magnitude of voltage Corresponding grey decision-making, if so, then compensates to the grey decision-making of the pixel according to second formula；

Second formula is：G '=G+ Δ G '

Wherein, G ' be compensation after view data in pixel grey decision-making；G be compensation before the pixel grey decision-making, Δ G ' is the offset inquired from the offset data table.

14. devices as claimed in claim 11, it is characterised in that in the offset data table, i-th shows jth in subregion Offset corresponding to GTG is：The second voltage value deducts the GTG corresponding to the difference that the first voltage is worth to Value；

The processing unit, specifically for determining the compensation way adopted for described image data；

The compensating unit, specifically for being compensated to described image data according to the compensation way determined, wherein：

If it is determined that adopting the first compensation way, then compensated according to the first formula, first formula is：

G '=G+ Δ G

Wherein, G ' be compensation after view data in pixel grey decision-making；G be compensation before the pixel grey decision-making, Δ G It is the offset inquired from the offset data table；

If it is determined that adopting the second compensation way, second compensation way to specifically include：

Determine the grey decision-making of pixel in described image data whether more than the pixel region public electrode magnitude of voltage Corresponding grey decision-making, if so, then compensates to the grey decision-making of the pixel according to the second formula；

If it is determined that adopting the 3rd compensation way, the 3rd compensation way to specifically include：

Determine the grey decision-making of pixel in described image data whether less than the pixel region public electrode magnitude of voltage Corresponding grey decision-making, if so, then compensates to the grey decision-making of the pixel according to second formula；

Second formula is：

G '=G+2 × Δ G '

Wherein, G ' be compensation after view data in pixel grey decision-making；G be compensation before the pixel grey decision-making, Δ G It is the offset inquired from the offset data table.

15. devices as described in any one of claim 10-14, it is characterised in that the MCU also includes：First smoothing processing Unit；

The first smoothing processing unit, in the compensating unit according to the offset of described image data to described image After data are compensated, for compensation after the first pixel, if in the neighbor of first pixel exist meet Second pixel of first condition, then judge the GTG after the grey decision-making after first pixel compensation and second pixel compensation Whether the absolute value of the difference of value is more than given threshold, and if so, then the grey decision-making after first pixel compensation is adjusted, With the absolute of the difference between reducing the grey decision-making after the first pixel adjustment and the grey decision-making after second pixel compensation Value；Wherein, the first condition is：Grey decision-making before grey decision-making before second pixel compensation and first pixel compensation It is equal.

16. devices as claimed in claim 10, it is characterised in that the MCU also includes：Second smoothing processing unit；

The second smoothing processing unit, in the compensating unit according to the offset of described image data to described image Before data are compensated, after the processing unit determines offset for the first pixel, if in the phase of first pixel There is the second pixel for meeting second condition in adjacent pixel, then judge the offset and second pixel of first pixel Whether the absolute value of the difference of offset is more than given threshold, and if so, then the offset of first pixel is adjusted, with Reduce the absolute value of the difference between offset and the offset of second pixel after the first pixel adjustment；Wherein, The second condition is：Grey decision-making before second pixel compensation is equal with the grey decision-making before first pixel compensation.

17. devices as claimed in claim 10, it is characterised in that the processing unit, specifically for：According to the pixel institute The GTG for showing subregion and described image pixel of category, inquires about default offset data table, obtains the pixel corresponding Offset；

Wherein, for each display subregion and every kind of GTG in the offset data table, it is provided with the display subregion and shows The grey decision-making corresponding to optimal public electrode voltage value when showing this kind of GTG, shows that subregion is referred to aobvious in liquid crystal module LCM Show the region being finely divided according to the rule of setting to viewing area on panel；

In the offset data table, in the i-th display subregion, the corresponding optimal public electrode voltage value of jth GTG is, aobvious i-th Show under the different voltages of the public electrode corresponding to subregion, measurement i-th shows that subregion shows the display effect of jth GTG, Obtain the magnitude of voltage of public electrode during optimal display result.

18. devices as claimed in claim 17, it is characterised in that the processing unit, specifically for：

For each pixel in N number of pixel, following steps are performed：

Determine the display subregion belonging to pixel；

The GTG for showing subregion and described image pixel according to belonging to the pixel, inquires about the offset data table；

Grey decision-making according to corresponding to the optimal public electrode voltages of the grey decision-making and display floater central area that inquire, really The offset of the fixed pixel；

Wherein, the optimal public electrode voltages of the display floater central area are measured in the following manner：It is being located at Under the different voltages of the public electrode corresponding to the viewing area of display floater central area, measure during the display subregion shows Between GTG display effect, obtain the magnitude of voltage of public electrode during optimal display result.

19. devices as claimed in claim 11, it is characterised in that the compensating unit is adder.