CN104505043A - Method and device for gray scale compensation of image data - Google Patents

Method and device for gray scale compensation of image data Download PDF

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Publication number
CN104505043A
CN104505043A CN201410848050.5A CN201410848050A CN104505043A CN 104505043 A CN104505043 A CN 104505043A CN 201410848050 A CN201410848050 A CN 201410848050A CN 104505043 A CN104505043 A CN 104505043A
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pixel
offset
making
grey decision
display
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CN104505043B (en
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苏凌志
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Tianma Microelectronics Co Ltd
Xiamen Tianma Microelectronics Co Ltd
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Tianma Microelectronics Co Ltd
Xiamen Tianma Microelectronics Co Ltd
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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 of view data and device
Technical field
The present invention relates to display technique field, particularly a kind of gray level compensation method of view data and device.
Background technology
Liquid crystal display (Liquid Crystal Display, LCD) has compact, Low emissivity because of it and the advantage such as power consumption is low, is used widely at present.
Liquid crystal display controls the transmittance of liquid crystal cells, with show image according to data-signal.For preventing liquid crystal polarization from affecting display effect, be added in the voltage at liquid crystal two ends, positive and negative alternately change, due to the difference of generating positive and negative voltage, the brightness that when causing malleation and negative pressure, panel produces is inconsistent, this creates the terminal flicker problem.
In prior art, the design of multiple public electrode is usually adopted to eliminate the flicker of display.
Fig. 1 is the structural representation designing 4 public electrodes in prior art in display panel.As shown in Figure 1,4 public electrodes are respectively: V1, V2, V3 and V4.D1 ~ D8 is data line, and G1 ~ G8 is gate line.Adopt the design of multiple public electrode, although certain improvement can be accomplished to the flashing state of whole panel, due to the restriction of the number of the cabling and public electrode that are limited to public electrode, still there is the problem of whole panel flash inequality.
Summary of the invention
The embodiment of the present invention provides a kind of gray level compensation method and device of view data, produces the phenomenon of flicker in order to eliminate display frame.
The gray level compensation method of the view data that the embodiment of the present invention provides, comprising:
Receive view data to be shown, described view data comprises the GTG of N number of pixel of a two field picture, and N is greater than 1;
For each pixel in described N number of pixel, perform following steps:
Determine the display subregion belonging to pixel;
Display subregion belonging to described pixel and the GTG of described image pixel, the offset data table that inquiry is preset, determines the offset that described pixel is corresponding;
The GTG of offset to described pixel according to the described pixel determined compensates.
Wherein, in described offset data table, each display subregion is provided with often kind of each self-corresponding offset of GTG; The display subregion of described pixel, refers to and is obtained by the regular partition of the viewing area of a two field picture according to setting.
The gray scale compensation device of the view data that the embodiment of the present invention provides, this device comprises: micro-control module MCU and data table memory; Wherein, described MCU comprises receiving element, processing unit and compensating unit;
Described receiving element, for receiving view data to be shown, described view data comprises the GTG of N number of pixel of a two field picture, and N is greater than 1;
Described data table memory, for storing offset data table;
Described processing unit, for for each pixel in described N number of pixel, performs following steps:
Determine the display subregion belonging to pixel;
Display subregion belonging to described pixel and the GTG of described image pixel, the offset data table that inquiry is preset, determines the offset that described pixel is corresponding;
Described compensating unit, for compensating according to the GTG of offset to described pixel of the described pixel determined.
Wherein, in described offset data table, each display subregion is provided with often kind of each self-corresponding offset of GTG; The display subregion of described pixel, refers to and is obtained by the regular partition of the viewing area of a two field picture according to setting.
The gray level compensation method of the view data that above-described embodiment provides and device, comprising: receive view data to be shown, and described view data comprises the GTG of N number of pixel of a two field picture, and N is greater than 1; For each pixel in described N number of pixel, determine the display subregion belonging to pixel; Display subregion belonging to described pixel and the GTG of described image pixel, the offset data table that inquiry is preset, determines the offset that described pixel is corresponding; The GTG of offset to described pixel according to the described pixel determined compensates, first, measured by data, set up offset data table, according to the offset data table set up, correction is compensated to the luma data of display screen actual displayed, thus realizes the flicker optimization of any viewing area of whole display panel, and then eliminate the flicker of whole display panel generation.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly introduced, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation designing 4 public electrodes in prior art in display panel;
Fig. 2 is the structural representation viewing area of display panel A being subdivided into n display subregion;
Fig. 3 is the storage schematic diagram storing identical offset for often kind of GTG of each display subregion;
The binary data of Fig. 4 to be grey decision-making be 8 bits stores the storage schematic diagram of different offsets for often kind of GTG of each display subregion;
Viewing area is subdivided into the structural representation that 3 show subregions according to the mode of area equalization by the viewing area of display panel B by Fig. 5;
Fig. 6 a ~ Fig. 6 b for the embodiment of the present invention provide pixel C, pixel D compensate before and after square wave structural representation;
Fig. 7 a ~ Fig. 7 b for the embodiment of the present invention provide pixel E, pixel F compensate before and after square wave structural representation;
Fig. 8 a ~ Fig. 8 b for the embodiment of the present invention provide pixel G, pixel H compensate before and after square wave structural representation;
The process flow diagram of the gray level compensation method of the view data that Fig. 9 provides for the embodiment of the present invention;
The structural representation of the gray scale compensation device of the view data that Figure 10 a ~ Figure 10 c provides for the embodiment of the present invention.
Embodiment
In order to make the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, the present invention is described in further detail, and obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making other embodiments all obtained under creative work prerequisite, belong to the scope of protection of the invention.
In the embodiment of the present invention, can pre-configured offset data table, described offset data table is used for compensating view data to be shown.
The offset stored in offset data table is relevant with the display subregion of display panel, wherein: the display subregion of display panel refers on a display panel to the region that viewing area is segmented according to the rule of setting.
In offset data table, the offset in the i-th display subregion corresponding to jth GTG obtains in the following manner, and 1≤i≤X, 1≤j≤Y, X is the quantity of display subregion, and Y is the quantity of GTG:
Under the different voltages being positioned at the public electrode corresponding to the display subregion of display panel central area, measure the display effect of GTG in the middle of the display of this display subregion, obtain the first magnitude of voltage of this public electrode during optimal display result;
Under the different voltages of the public electrode corresponding to the i-th display subregion, measure the display effect of the i-th display subregion display jth GTG, obtain the second magnitude of voltage of this public electrode during optimal display result;
According to described first magnitude of voltage and described second magnitude of voltage, determine the offset that in the i-th display subregion, jth GTG is corresponding.
Such as, viewing area on display panel A is subdivided into the structural representation of n display subregion by the mode on average divided according to the area of the viewing area of display panel, can see Fig. 2, namely Fig. 2 is the structural representation viewing area of display panel A being subdivided into n display subregion.As shown in Figure 2, the viewing area of display panel is on average divided into n display subregion according to the area of viewing area, and this n display subregion is respectively display subregion 1, display subregion 2, display subregion 3, display subregion (n-2), display subregion (n-1) and display subregion n.
After the viewing area of display panel is carried out be subdivided into display subregion according to the rule of setting, often kind of GTG for each display subregion can store identical offset, also can store different offsets.Introduce respectively below:
One, often kind of GTG for display subregion each in offset data table stores identical offset.
After the viewing area of display panel A is carried out be subdivided into n display subregion according to the rule of setting, namely based on shown in Fig. 2 by the viewing area of display panel according to the area of viewing area be on average divided into n display subregion after, often kind of GTG for each display subregion can store the structural representation of identical offset, can see Fig. 3.Namely Fig. 3 is the storage schematic diagram storing identical offset for often kind of GTG of each display subregion.As shown in Figure 3, the offset stored for often kind of GTG in display subregion 1 is a 0, the offset that often kind of GTG in display subregion 2 stores is a 1; The offset that often kind of GTG in display subregion 3 stores is a 2; The offset that often kind of GTG in display subregion (n-2) stores is a (n-2); The offset that often kind of GTG in display subregion (n-1) stores is a (n-1)and the offset that often kind of GTG in display subregion n stores is a n.
Such as, take grey decision-making as the binary data of 8 bits, then based on the basis of Fig. 2 and Fig. 3, the offset of 256 kinds of GTGs in display subregion 1 is a 0, the offset of 256 kinds of GTGs in display subregion 2 is a 1, the offset of 256 kinds of GTGs in display subregion 3 is a 2, 256 kinds of GTGs in display subregion (n-2) offset be a (n-2), 256 kinds of GTGs in display subregion (n-1) offset be a (n-1), 256 kinds of GTGs in display subregion n offset be a n.
Two, often kind of GTG for display subregion each in offset data table stores different offsets.
After the viewing area of display panel is carried out be subdivided into n display subregion according to the rule of setting, namely based on shown in Fig. 2 by the viewing area of display panel according to the area of viewing area be on average divided into n display subregion after, the different offset that often kind of GTG for each display subregion can store.
Such as, for the binary data that grey decision-making is 8 bits, then based on being subdivided on the basis of n display subregion display panel shown in Fig. 2, often kind of GTG for each display subregion stores the storage schematic diagram of different offsets, can see Fig. 4.Namely the binary data of Fig. 4 to be grey decision-making be 8 bits stores the storage schematic diagram of different offsets for often kind of GTG of each display subregion.
As shown in Figure 4, the offset stored for the 1st kind of GTG LI in display subregion 1 is X11, the offset that the 2nd kind of GTG L2 in display subregion 1 stores is X12, the offset that the 3rd kind of GTG L3 in display subregion 1 stores is X13, the offset that the 4th kind of GTG L4 in display subregion 1 stores is X14 ... the offset that the 127th kind of GTG L127 in display subregion 1 stores is X1127 ... the offset that the 255th kind of GTG L255 in display subregion 1 stores is the offset that the 256th kind of GTG L256 in X1255 and display subregion 1 stores is X1256.
As shown in Figure 4, the offset stored for the 1st kind of GTG LI in display subregion 2 is X21, the offset that the 2nd kind of GTG L2 in display subregion 2 stores is X22, the offset that the 3rd kind of GTG L3 in display subregion 2 stores is X23, the offset that the 4th kind of GTG L4 in display subregion 2 stores is X24 ... the offset that the 127th kind of GTG L127 in display subregion 2 stores is X2127 ... the offset that the 255th kind of GTG L255 in display subregion 2 stores is the offset that the 256th kind of GTG L256 in X2255 and display subregion 2 stores is X2256.
As shown in Figure 4, the offset stored for the 1st kind of GTG LI in display subregion 3 is X31, the offset that the 2nd kind of GTG L2 in display subregion 3 stores is X32, the offset that the 3rd kind of GTG L3 in display subregion 3 stores is X33, the offset that the 4th kind of GTG L4 in display subregion 3 stores is X34 ... the offset that the 127th kind of GTG L127 in display subregion 3 stores is X3127 ... the offset that the 255th kind of GTG L255 in display subregion 3 stores is the offset that the 256th kind of GTG L256 in X3255 and display subregion 3 stores is X3256.
As shown in Figure 4, the offset stored for the 1st kind of GTG LI in display subregion n is Xn1, the offset that the 2nd kind of GTG L2 in display subregion n stores is Xn2, the offset that the 3rd kind of GTG L3 in display subregion n stores is Xn3, the offset that the 4th kind of GTG L4 in display subregion n stores is Xn4 ... the offset that the 127th kind of GTG L127 in display subregion n stores is Xn127 ... the offset that the 255th kind of GTG L255 in display subregion n stores is the offset that the 256th kind of GTG L256 in Xn255 and display subregion n stores is Xn256.
Below by several example, which kind of compensation way the backoff algorithm to the offset stored in calculation compensation tables of data and the offset according to offset data table adopt compensate to the data to be displayed received to carry out detailed explanation explanation.
[citing 1]
By example 1, account form i.e. two kinds of backoff algorithms of the offset that offset data table stores are described:
Suppose that the grey decision-making related in this example is all the binary data of 8 bits for grey decision-making.
Further hypothesis, is subdivided into viewing area the structural representation that 3 show subregions according to the mode of area equalization by the viewing area of display panel B, can see Fig. 5.Namely viewing area is subdivided into the structural representation that 3 show subregions according to the mode of area equalization by the viewing area of display panel B by Fig. 5.As shown in Figure 5, viewing area is subdivided into 3 display subregions according to the mode of area equalization by the viewing area of display panel B to be respectively: display subregion 1, display subregion 2 and display subregion 3.Wherein, the display subregion that subregion 2 is the central area of display panel B is shown.
Under the different voltages of the public electrode corresponding to display subregion 2, measure the display effect that display subregion 2 shows middle GTG (the 127th kind of GTG or the 128th kind of GTG), the magnitude of voltage showing the public electrode of subregion 2 when obtaining optimal display result, as the first magnitude of voltage V1 of the public electrode of display subregion 2, supposes that the value of V1 is 5v.
For describing for simplicity, the computing method of the offset of often kind of GTG of display subregion 3 are described by the computing method of the offset describing the 200th kind of GTG of display subregion 3 in example 1.For the binary data that grey decision-making is 8 bits, then the grey decision-making showing the 200th kind of GTG of subregion 3 represents with binary data, is 11001000.
First, under the different voltages of the public electrode corresponding to display subregion 3, measurement display subregion 3 shows display effect during the 200th kind of GTG, magnitude of voltage when display subregion 3 is shown the optimal display result of the 200th kind of GTG, as the second magnitude of voltage V2 of the public electrode of display subregion 3, supposes that the value of V2 is 6v.
Then, according to the first magnitude of voltage V1 and the second magnitude of voltage V2, determine the 200th kind of display subregion 3 offset corresponding to GTG, calculate by following two kinds of backoff algorithms:
Backoff algorithm one: the second magnitude of voltage V2 is deducted the difference DELTA V that the first magnitude of voltage V1 obtains, using the grey decision-making corresponding to difference DELTA V as the offset corresponding to the 200th kind of GTG showing subregion 3, stored in compensation database table.
Such as, in example 1, the first magnitude of voltage V1 is 5V, second magnitude of voltage V2 is 6V, then the second magnitude of voltage V2 being deducted the difference DELTA V that the first magnitude of voltage V1 obtains is 1V, the grey decision-making that further hypothesis Δ V=1V is corresponding is 5, for the binary data that grey decision-making is 8 bits, then grey decision-making 5 represents with binary data, be then: 00000101.Use the data 00000101 of binary representation stored in offset data table grey decision-making 5.
It should be noted that not being only applicable to the first compensation way to the offset adopting backoff algorithm one to calculate also is applicable to the second compensation way or the 3rd compensation way.
On basis based on example 1, be how to compensate according to the first compensation way to carry out detailed explanation explanation by a concrete example and example 2 to the view data to be shown received again below.
[citing 2]
Suppose to receive frame view data to be shown, in order to describe for simplicity, further hypothesis, this frame view data to be shown only comprises a pixel P0, the GTG kind of P0 in this 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 kind of GTG of pixel P0 and grey decision-making 200 represent with binary data, be then: 11001000.And the 200th of the display subregion 3 stored in offset data table the kind of offset that GTG is corresponding 00000101, namely both 11001000 and 00000101 are added, grey decision-making after the pixel P0 then obtained in this frame image data compensates is 205, the 205th kind of GTG of the pixel P0 after compensation and grey decision-making 205 represent with binary data, be then: 11001101.
On basis based on above-mentioned citing 1, gamma (gamma) voltage below by pixel in view data is the square wave schematic diagram after 0V and 10V compensates with employing first compensation way before compensation, explains the compensation effect of employing first compensation way.
Gamma (gamma) voltage supposing the pixel shown in subregion 3 is 0V and 10V.Wherein, the magnitude of voltage of pixel C is the magnitude of voltage of 10v, pixel D is 0V, and the magnitude of voltage of the public electrode of display subregion 3 is 6v.The square wave structural representation of magnitude of voltage before compensation of the public electrode of pixel C, pixel D and display subregion 3, can see Fig. 6 a.Namely Fig. 6 a is the square wave structural representation of magnitude of voltage before compensation of the public electrode of pixel C, pixel D and display subregion 3.As shown in Figure 6 a, can find out, before compensation, the magnitude of voltage of pixel C is 10v, the magnitude of voltage of pixel D is 0V, therefore, before compensation, voltage difference between the best public electrode V2 of pixel C and display subregion 3 is 4v, and the voltage difference between the best public electrode V2 of pixel D and display subregion 3 is 6v, can find out, before compensation, voltage difference 4v between the magnitude of voltage of the positive voltage of pixel C and the public electrode of display subregion 3, and the voltage difference 6v between the magnitude of voltage of the public electrode of the negative voltage of pixel D and display subregion 3 is unequal, therefore, the brightness that when can cause positive voltage and negative voltage, display panel produces is inconsistent, thus cause display panel to produce the problem of flickering display.
On basis based on citing 1, can determine that offset is 1V, according to the offset 1V determined, pixel C and pixel D be compensated respectively below, pixel then after pixel C compensation is C ', and the magnitude of voltage of C ' is 11V, pixel D compensate after pixel be D ', and the magnitude of voltage of D ' is 1V.After compensating pixel C and pixel D according to the offset determined, i.e. the square wave structural representation of magnitude of voltage after compensation of the public electrode of pixel C ', pixel D ' and display subregion 3, can see Fig. 6 b.Namely 6b is the square wave structural representation of magnitude of voltage after compensation of the public electrode of pixel C ', pixel D ' and display subregion 3.As shown in Figure 6 b, can find out, after compensation, voltage difference between the magnitude of voltage of the positive voltage of pixel C ' and the public electrode of display subregion 3 is 5v, and the voltage difference between the magnitude of voltage of the public electrode of the negative voltage of pixel D ' and display subregion 3 is also 5v, therefore, the brightness that when positive voltage after compensation and negative voltage, display panel produces is consistent, thus eliminates the flickering display of display panel.Backoff algorithm two: the second magnitude of voltage V2 is deducted the difference DELTA V that the first magnitude of voltage V1 obtains, using the grey decision-making of the twice of difference DELTA V that is corresponding to 2 Δ V as display subregion 3 the 200th kind of GTG corresponding to offset, stored in compensation database table.
Such as, be 5V at this example first magnitude of voltage V1, second magnitude of voltage V2 is 6V, then difference DELTA V is 1V, the twice i.e. 2 Δ V of difference DELTA V are 2V, and the grey decision-making that hypothesis Δ V=2V is corresponding is further 10, take grey decision-making as the binary data of 8 bits, then grey decision-making 10 represents with binary data, be then: 00001010.Use the data 00001010 of binary representation stored in offset data table grey decision-making 10.
It should be noted that the offset to adopting backoff algorithm to calculate is only applicable to the second compensation way or the 3rd compensation way.
On basis based on example 1, be how to compensate according to the second compensation way to carry out detailed explanation explanation by a concrete example and example 3 to the view data to be shown received again below.
[citing 3]
In example 3, the grey decision-making that first magnitude of voltage of the public electrode of hypothesis display subregion 3 is corresponding is 150.
Then, suppose to receive frame view data to be shown, in order to describe for simplicity, further hypothesis, this frame view data to be shown only comprises a pixel P0, and the grey decision-making that the GTG kind of P0 in this frame image data is 200 i.e. P0 is 200, represents, be then: 11001000 with binary data.And pixel P0 belongs to display subregion 1.According to the grey decision-making of pixel P0, judge whether the grey decision-making of P0 is greater than grey decision-making 150 corresponding to the magnitude of voltage of public electrode of display subregion 3, grey decision-making 200 due to P0 is in the present example greater than grey decision-making 150 corresponding to the magnitude of voltage of the public electrode of display subregion 3, so the offset of the correspondence that can mode two be adopted to calculate the 200th of the display subregion 3 stored in offset data table kind of GTG, namely the corresponding grey decision-making 00001010 of the employing stored in offset data table 2 times of differences, namely both 11001000 and 00001010 are added, grey decision-making after the pixel P0 then obtained in this frame image data compensates is 210, 210th GTG of the pixel P0 after compensation and grey decision-making 210 represent with binary data, be then: 11010010.Otherwise, if the grey decision-making of P0 is the grey decision-making being not more than grey decision-making corresponding to the magnitude of voltage of public electrode of display subregion 3 and P0 is the grey decision-making that the magnitude of voltage of the public electrode being less than or equal to display subregion 3 is corresponding, then pixel P0 is not compensated.Namely the luma data that the second compensation way is only greater than the grey decision-making corresponding to magnitude of voltage of the public electrode of this pixel region to the grey decision-making of the pixel in view data to be shown compensates.
It should be noted that the second compensation way is only greater than the grey decision-making corresponding to magnitude of voltage of the public electrode of this pixel region luma data to the grey decision-making of the pixel in view data to be shown compensates.And the luma data grey decision-making of the pixel in view data to be shown being less than or equal to the grey decision-making corresponding to magnitude of voltage of the public electrode of this pixel region does not compensate.
On basis based on above-mentioned citing 1, gamma (gamma) voltage below by pixel in view data is the square wave schematic diagram after 0V and 11V compensates with employing second compensation way before compensation, is described the compensation effect of employing second compensation way.
Gamma (gamma) voltage supposing the pixel shown in subregion 3 is 0V and 11V.Wherein, the magnitude of voltage of pixel E is the magnitude of voltage of 11v, pixel F is 0V, and the magnitude of voltage of the public electrode of display subregion 3 is 6v.The square wave structural representation of magnitude of voltage before compensation of the public electrode of pixel E, pixel F and display subregion 3, can see Fig. 7 a.Namely Fig. 7 a is the square wave structural representation of magnitude of voltage before compensation of the public electrode of pixel E, pixel F and display subregion 3.As shown in Figure 7a, can find out, before compensation, the magnitude of voltage of pixel E is 11v, the magnitude of voltage of pixel F is 0V, voltage difference between the best public electrode V2 of pixel E and display subregion 3 is 5v, and the voltage difference between the best public electrode V2 of pixel F and display subregion 3 is 6v, can find out, before compensation, voltage difference 5v between the magnitude of voltage of the positive voltage of pixel E and the public electrode of display subregion 3, and the voltage difference 6v between the magnitude of voltage of the public electrode of the negative voltage of pixel D and display subregion 3 is unequal, therefore, the brightness that when can cause positive voltage and negative voltage, display panel produces is inconsistent, thus cause display panel to produce the problem of flickering display.
On basis based on citing 1, can determine that offset is 1V, suppose that the grey decision-making of pixel E is greater than the grey decision-making corresponding to magnitude of voltage 6V of the public electrode of the display subregion 3 at pixel E place, and the grey decision-making of hypothesis pixel F is not more than the grey decision-making corresponding to magnitude of voltage 6V of the public electrode of the display subregion 3 at pixel F place, therefore the second compensation way can be adopted only to compensate pixel E, namely only pixel E is compensated according to the offset 1V determined, and pixel F is not compensated, pixel then after pixel E compensation is E ', and the magnitude of voltage of E ' is 12V.After compensating pixel E according to the offset determined, the square wave structural representation of magnitude of voltage after compensation of the public electrode of the pixel E ' after pixel F, compensation and display subregion 3, can see Fig. 7 b.Namely Fig. 7 b is the square wave structural representation of magnitude of voltage after compensation of the public electrode of pixel E ', pixel F and display subregion 3.As shown in Figure 7b, can find out, after compensation, voltage difference between the magnitude of voltage of the positive voltage of pixel E ' and the public electrode of display subregion 3 is 6v, and the voltage difference between the magnitude of voltage of the public electrode of the negative voltage of pixel F and display subregion 3 is also 6v, therefore, the brightness that when positive voltage after compensation and negative voltage, display panel produces is consistent, thus eliminates the flickering display of display panel.
On basis based on example 1, be how to compensate according to the 3rd compensation way to carry out detailed explanation explanation by a concrete example and example 4 to the view data to be shown received again below.
[citing 4]
In example 4, the grey decision-making that first magnitude of voltage of the public electrode of hypothesis display subregion 3 is corresponding is 220.
Then, suppose to receive frame view data to be shown, in order to describe for simplicity, further hypothesis, this frame view data to be shown only comprises a pixel P1, and the grey decision-making that the GTG kind of P1 in this frame image data is 200 i.e. P0 is 200, represents, be then: 11001000 with binary data.And pixel P1 belongs to display subregion 3.According to the grey decision-making of pixel P1, judge whether the grey decision-making of P1 is less than in grey decision-making 150 corresponding to the magnitude of voltage of the public electrode of display subregion 3, grey decision-making 200 due to P1 is in the present example greater than grey decision-making 220 corresponding to the magnitude of voltage of the public electrode of display subregion 3, so the offset of the correspondence that can mode two be adopted to calculate the 200th of the display subregion 3 stored in offset data table kind of GTG, namely the corresponding grey decision-making 00001010 of the employing stored in offset data table 2 times of differences, namely both 11001000 and 00001010 are added, grey decision-making after the pixel P0 then obtained in this frame image data compensates is 210, 210th GTG of the pixel P0 after compensation and grey decision-making 210 represent with binary data, be then: 11010010.Otherwise, if the grey decision-making that the grey decision-making of P1 is not less than grey decision-making corresponding to the magnitude of voltage of public electrode of display subregion 3 and the P1 grey decision-making that to be the magnitude of voltage of the public electrode being more than or equal to display subregion 3 corresponding, then pixel P1 is not compensated.Namely the luma data that the 3rd compensation way is only less than the grey decision-making corresponding to magnitude of voltage of the public electrode of this pixel region to the grey decision-making of the pixel in view data to be shown compensates.
It should be noted that the 3rd compensation way is only less than the grey decision-making corresponding to magnitude of voltage of the public electrode of this pixel region luma data to the grey decision-making of the pixel in view data to be shown compensates.And the luma data grey decision-making of the pixel in view data to be shown being more than or equal to the grey decision-making corresponding to magnitude of voltage of the public electrode of this pixel region does not compensate.
On basis based on above-mentioned citing 1, gamma (gamma) voltage below by pixel in graph data is the square wave schematic diagram after 0V and 11V compensates with employing the 3rd compensation way before compensation, explains the compensation effect of employing the 3rd compensation way.
Gamma (gamma) voltage supposing the pixel shown in subregion 3 is 0V and 11V.Wherein, the magnitude of voltage of pixel G is the magnitude of voltage of 11v, pixel H is 0V, and the magnitude of voltage of the public electrode of display subregion 3 is 6v.The square wave structural representation of magnitude of voltage before compensation of the public electrode of pixel G, pixel H and display subregion 3, can see Fig. 8 a.Namely Fig. 8 a is the square wave structural representation of magnitude of voltage before compensation of the public electrode of pixel G, pixel H and display subregion 3.As shown in Figure 8 a, can find out, before compensation, the magnitude of voltage of pixel G is 11v, the magnitude of voltage of pixel H is 0V, voltage difference between the best public electrode V2 of pixel G and display subregion 3 is 5v, and the voltage difference between the best public electrode V2 of pixel H and display subregion 3 is 6v, can find out, before compensation, voltage difference 5v between the magnitude of voltage of the positive voltage of pixel G and the public electrode of display subregion 3, and the voltage difference 6v between the magnitude of voltage of the public electrode of the negative voltage of pixel H and display subregion 3 is unequal, therefore, the brightness that when can cause positive voltage and negative voltage, display panel produces is inconsistent, thus cause display panel to produce the problem of flickering display.
On basis based on citing 1, can determine that offset is 1V, suppose that the grey decision-making of H is less than the grey decision-making corresponding to magnitude of voltage 6V of the public electrode of the display subregion 3 at pixel H place, and the grey decision-making of hypothesis pixel G is not less than the grey decision-making corresponding to magnitude of voltage 6V of the public electrode of the display subregion 3 in pixel F place, therefore the 3rd compensation way can therefore can be adopted only to compensate pixel H, namely only pixel H is compensated according to the offset 1V determined, and pixel G is not compensated, pixel then after pixel H compensation is H ', and the magnitude of voltage of H ' is 1V.After compensating pixel H according to the offset determined, the square wave structural representation of magnitude of voltage after compensation of the public electrode of the pixel H ' after pixel G, compensation and display subregion 3, can see Fig. 8 b.Namely Fig. 8 b be pixel G, compensate after the square wave structural representation of magnitude of voltage after compensation of public electrode of pixel H ' and display subregion 3.As shown in Figure 8 b, can find out, after compensation, voltage difference between the magnitude of voltage of the positive voltage of pixel G and the public electrode of display subregion 3 is 5v, and compensate after pixel H ' negative voltage and display subregion 3 public electrode magnitude of voltage between voltage difference be also 5v, therefore, the brightness that when positive voltage after compensation and negative voltage, display panel produces is consistent, thus eliminates the flickering display of display panel.
Further, in order to increase compensation way flexible to, when compensating the GTG of view data, can the first compensation way, the second compensation way and the 3rd compensation way be carried out used in combination.
[citing 5]
How to compensate according to mixed compensation mode i.e. the first compensation way, the second compensation way and the 3rd compensation way to carry out detailed explanation explanation below by a concrete example and example 5 to the view data to be shown received.
Based on viewing area is subdivided on 3 bases showing the structural representation of subregions by the mode of the viewing area of display panel B according to area equalization shown in Fig. 4.
First, under the different voltages of the public electrode corresponding to display subregion 2, measure the display effect that display subregion 2 shows middle GTG (the 127th kind of GTG or the 128th kind of GTG), the magnitude of voltage showing the public electrode of subregion 2 when obtaining optimal display result, as the first magnitude of voltage V1 of the public electrode of display subregion 2, supposes that the value of V1 is 5v.
Under the different voltages of the public electrode corresponding to display subregion 3, measurement display subregion 3 shows display effect during the 100th kind of GTG, magnitude of voltage when display subregion 3 is shown the optimal display result of the 100th kind of GTG, as the third voltage value V3 of the public electrode of display subregion 3, supposes that the value of V3 is 3v.
Under the different voltages of the public electrode corresponding to display subregion 3, measurement display subregion 3 shows display effect during the 200th kind of GTG, magnitude of voltage when display subregion 3 is shown the optimal display result of the 200th kind of GTG, as the 4th magnitude of voltage V4 of the public electrode of display subregion 3, supposes that the value of V4 is 6v.
Under the different voltages of the public electrode corresponding to display subregion 3, measurement display subregion 3 shows display effect during the 220th kind of GTG, magnitude of voltage when display subregion 3 is shown the optimal display result of the 220th kind of GTG, as the 5th magnitude of voltage V5 of the public electrode of display subregion 3, supposes that the value of V5 is 7v.
Then, according to the first magnitude of voltage V1 and third voltage value V3, determine the 100th kind of display subregion 3 offset corresponding to GTG, the offset corresponding to the 100th kind of GTG of display subregion 2 is calculated by backoff algorithm one, the difference DELTA V that the first magnitude of voltage V1 obtains is deducted by third voltage value V3, using the grey decision-making corresponding to difference DELTA V as the offset corresponding to the 100th kind of GTG showing subregion 3, stored in compensation database table.
Such as, in example 5, the first magnitude of voltage V1 is 5V, third voltage value V3 is 3V, then difference DELTA V is (-2) V, the grey decision-making that further hypothesis Δ V=-2V is corresponding is 2, for the binary data that grey decision-making is 8 bits, then grey decision-making 2 represents with binary data, be then: 00000010.Use the data 00000010 of binary representation stored in offset data table grey decision-making 2.
According to the first magnitude of voltage V1 and the 4th magnitude of voltage V4, determine the 200th kind of display subregion 3 offset corresponding to GTG, the offset corresponding to the 200th kind of GTG of display subregion 2 is calculated by backoff algorithm one, the difference DELTA V that the first magnitude of voltage V1 obtains is deducted by the 4th magnitude of voltage V4, using the grey decision-making corresponding to difference DELTA V as the offset corresponding to the 200th kind of GTG showing subregion 3, stored in compensation database table.
Such as, in example 5, the first magnitude of voltage V1 is 5V, and the 4th magnitude of voltage V3 is 6V, then difference DELTA V is 1V, and the grey decision-making that hypothesis Δ V=1V is corresponding is further 5, take grey decision-making as the binary data of 8 bits, then grey decision-making 5 represents with binary data, be then: 00000101.Use the data 00000101 of binary representation stored in offset data table grey decision-making 5.
According to the first magnitude of voltage V1 and the 5th magnitude of voltage V5, determine the 220th kind of display subregion 3 offset corresponding to GTG, the offset corresponding to the 220th kind of GTG of display subregion 2 is calculated by backoff algorithm one, the difference DELTA V that the first magnitude of voltage V1 obtains is deducted by the 5th magnitude of voltage V5, using the grey decision-making corresponding to difference DELTA V as the offset corresponding to the 220th kind of GTG showing subregion 3, stored in compensation database table.
Such as, in example 5, the first magnitude of voltage V1 is 5V, and the 5th magnitude of voltage V5 is 7V, then difference DELTA V is 2V, and the grey decision-making that hypothesis Δ V=2V is corresponding is further 10, take grey decision-making as the binary data of 8 bits, then grey decision-making 10 represents with binary data, be then: 00001010.Use the data 00001010 of binary representation stored in offset data table grey decision-making 10.
Further hypothesis, the grey decision-making that the magnitude of voltage of the public electrode of display subregion 3 is corresponding is 150.
Suppose to receive frame view data to be shown, in order to describe for simplicity, suppose further, this frame view data to be shown only comprises three pixel P2, P3, P4, and pixel P2, P3, P4 belong to display subregion 3.
Further hypothesis, the GTG kind of P2 in this frame image data is the grey decision-making of 200 i.e. P2 is 200, represents, be then: 11001000 with binary data.The GTG kind of P3 in this frame image data is the grey decision-making of 220 i.e. P3 is 220, represents, be then: 11011100 with binary data.The GTG kind of P4 in this frame image data is the grey decision-making of 100 i.e. P4 is 100, represents, be then: 01100010 with binary data.
Further hypothesis, P2 adopts the first compensation way to compensate, and P3 adopts the second compensation way to compensate, and P4 adopts the 3rd compensation way to compensate.
Because pixel P2 adopts the first compensation way to compensate, then can according to the data 00000101 of the grey decision-making 5 stored in the 200th of pixel P2 kind of GTG and offset data table with binary representation, by grey decision-making 200+5=205, carry out being added the grey decision-making 205 after being later compensated by the offset data 00000101 stored in 11001000 and offset data table, grey decision-making 205 data of binary representation, be then: 11001101.
Because pixel P3 adopts the second compensation way to compensate, then first according to the grey decision-making of pixel P3, judge whether the grey decision-making of P3 is greater than grey decision-making 150 corresponding to the magnitude of voltage of public electrode of display subregion 3, grey decision-making 220 due to P3 is in the present example greater than grey decision-making 150 corresponding to the magnitude of voltage of the public electrode of display subregion 3, then to the 220th kind of data that GTG stores 5 of the display subregion 3 stored in offset data table, and offset value calculation 5 is multiplied by 2 offsets that is corresponding to 5*2=10,10 represent with binary data, be then: 00001010.Then the data stored in offset data table are carried out calculating and be namely multiplied by the offset 10 obtained after 2 and be added with the grey decision-making of pixel P3,220+10=230, carry out being added the grey decision-making 230 after being later compensated by 11011100 and 00001010, grey decision-making 230 data of binary representation, be then: 11100110.
Because pixel P4 adopts the third compensation way to compensate, then first according to the grey decision-making of pixel P4, judge whether the grey decision-making of P4 is less than grey decision-making 150 corresponding to the magnitude of voltage of public electrode of display subregion 3, grey decision-making 100 due to P4 is in the present example less than grey decision-making 150 corresponding to the magnitude of voltage of the public electrode of display subregion 3, then to the 100th kind of data that GTG stores 1 of the display subregion 3 stored in offset data table, and offset value calculation 1 is multiplied by 2 offsets that is corresponding to 1*2=2,2 represent with binary data, be then: 00000010.Then the data stored in offset data table are carried out calculating and be namely multiplied by the offset 2 obtained after 2 and be added with the grey decision-making of pixel P4,100+2=102, carry out being added the grey decision-making 102 after being later compensated by 01100010 and 00000010, grey decision-making 102 data of binary representation, be then: 01100100.
The dirigibility of data is stored in order to increase offset data, also can store in offset data table for each display subregion and often kind of GTG, be provided with the grey decision-making corresponding to best public electrode voltages value when this display subregion shows this kind of GTG, wherein, the best public electrode voltages value that in i-th display subregion, jth GTG is corresponding is, under the different voltages of the public electrode corresponding to the i-th display subregion, measure the display effect of the i-th display subregion display jth GTG, obtain the magnitude of voltage of this public electrode during optimal display result.
Based on shown in Fig. 4, viewing area being subdivided into 3 display subregions according to the mode of area equalization by the viewing area of display panel B: on the basis of display subregion 1, display subregion 2 and display subregion 3.
Under the different voltages of the public electrode corresponding to display subregion 2, measure the display effect that display subregion 2 shows middle GTG (the 127th kind of GTG or the 128th kind of GTG), the six magnitude of voltage V6 of magnitude of voltage as the public electrode of display subregion 2 of the public electrode of subregion 2 is shown when obtaining optimal display result, suppose that the value of V6 is 10v, and determine the grey decision-making corresponding to value 10v of V6, suppose that grey decision-making first grey decision-making corresponding to value 10v of V6 is 10.
For describing for simplicity, the computing method of the offset of often kind of GTG of display subregion 1 are described by the computing method of the offset describing the 100th kind of GTG of display subregion 1.
Under the different voltages of the public electrode corresponding to display subregion 1, measurement display subregion 1 shows display effect during the 100th kind of GTG, magnitude of voltage when display subregion 1 is shown the optimal display result of the 100th kind of GTG is as the 7th magnitude of voltage V7 of the public electrode of display subregion 1, suppose that the value of V7 is 8v, then by the grey decision-making corresponding to the value 8v of V7 stored in offset data table, suppose that grey decision-making second 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 received is compensated and also comprises three kinds of compensation ways and be respectively: the 4th compensation way, the 5th compensation way and the 6th compensation way.
4th compensation way:
Suppose to receive frame view data to be shown, in order to describe for simplicity, further hypothesis, this frame view data to be shown only comprises a pixel P9, and the grey decision-making of P9 in this frame image data is 100, and pixel P9 belongs to display subregion 1, then when compensating pixel P9, first from offset data table, read the second grey decision-making 8 of display subregion 1, and difference is asked in 8 and the first grey decision-making 10 of the public electrode of display subregion 2, the difference-2 of the second grey decision-making and the first grey machine value can be obtained, then compensate with 100 GTGs of GTG difference-2 couples of pixel P9,-2+100=98, namely the GTG after pixel P9 compensation is 98.
5th compensation way:
Suppose that the grey decision-making that the magnitude of voltage of the public electrode showing subregion 1 is corresponding is 50.
Suppose to receive frame view data to be shown, in order to describe for simplicity, further hypothesis, this frame view data to be shown only comprises a pixel P10, and the grey decision-making of P10 in this frame image data is 100, and pixel P10 belongs to display subregion 1, then when compensating pixel P10, first judge whether the grey decision-making of P10 is greater than grey decision-making 50 corresponding to the magnitude of voltage of public electrode of display subregion 1 according to the grey decision-making of pixel P10, grey decision-making 100 due to P10 is in the present example greater than grey decision-making 50 corresponding to the magnitude of voltage of the public electrode of display subregion 1, from offset data table, then read the second grey decision-making 8 of display subregion 1, and difference is asked in 8 and the first grey decision-making 10 of the public electrode of display subregion 2, the difference (-2) of the second grey decision-making and the first grey machine value can be obtained, GTG difference (-2) being multiplied by 2 is (-2) * 2=(-4), compensate with 100 GTGs of GTG difference to pixel P10 obtained after calculating, (-4)+100=96, namely the GTG after pixel P10 compensation is 96.Otherwise, if the grey decision-making that the grey decision-making of P10 is not more than grey decision-making corresponding to the magnitude of voltage of public electrode of display subregion 1 and the P10 grey decision-making that to be the magnitude of voltage of the public electrode being less than or equal to display subregion 1 corresponding, then pixel P10 is not compensated.Namely the luma data that the 5th compensation way is only greater than the grey decision-making corresponding to magnitude of voltage of the public electrode of this pixel region to the grey decision-making of the pixel in view data to be shown compensates.
It should be noted that the 5th compensation way is only greater than the grey decision-making corresponding to magnitude of voltage of the public electrode of this pixel region luma data to the grey decision-making of the pixel in view data to be shown compensates.And the luma data grey decision-making of the pixel in view data to be shown being less than or equal to the grey decision-making corresponding to magnitude of voltage of the public electrode of this pixel region does not compensate.
6th compensation way:
Suppose that the grey decision-making that the magnitude of voltage of the public electrode showing subregion 1 is corresponding is 150.
Suppose to receive frame view data to be shown, in order to describe for simplicity, further hypothesis, this frame view data to be shown only comprises a pixel P11, and the grey decision-making of P11 in this frame image data is 100, and pixel P10 belongs to display subregion 1, then when compensating pixel P10, first judge whether the grey decision-making of P10 is less than grey decision-making 150 corresponding to the magnitude of voltage of public electrode of display subregion 1 according to the grey decision-making of pixel P10, grey decision-making 100 due to P10 is in the present example less than grey decision-making 150 corresponding to the magnitude of voltage of the public electrode of display subregion 1, from offset data table, then read the second grey decision-making 8 of display subregion 1, and difference is asked in 8 and the first grey decision-making 10 of the public electrode of display subregion 2, the difference (-2) of the second grey decision-making and the first grey machine value can be obtained, GTG difference (-2) being multiplied by 2 is (-2) * 2=(-4), compensate with 100 GTGs of GTG difference to pixel P10 obtained after calculating, (-4)+100=96, namely the GTG after pixel P10 compensation is 96.Otherwise, if the grey decision-making that the grey decision-making of P10 is not less than grey decision-making corresponding to the magnitude of voltage of public electrode of display subregion 1 and the P10 grey decision-making that to be the magnitude of voltage of the public electrode being more than or equal to display subregion 1 corresponding, then pixel P10 is not compensated.Namely the luma data that the 6th compensation way is only less than the grey decision-making corresponding to magnitude of voltage of the public electrode of this pixel region to the grey decision-making of the pixel in view data to be shown compensates.
It should be noted that the 6th compensation way is only less than the grey decision-making corresponding to magnitude of voltage of the public electrode of this pixel region luma data to the grey decision-making of the pixel in view data to be shown compensates.And the luma data grey decision-making of the pixel in view data to be shown being more than or equal to the grey decision-making corresponding to magnitude of voltage of the public electrode of this pixel region does not compensate.
The mixing application class of the 4th compensation way, the 5th compensation way and the 6th compensation way is applied like the mixing of the first compensation way, the second compensation way and the 3rd compensation way, no longer illustrates at this.
Based on the data stored in above-mentioned offset data table, the embodiment of the present invention provides a kind of gray level compensation method of view data.
Fig. 9, the process flow diagram of the gray level compensation method of the view data provided for the embodiment of the present invention.As shown in Figure 9, the method can comprise:
S901, receive view data to be shown, described view data comprises the GTG of N number of pixel of a two field picture, and N is greater than 1.
S902, for each pixel in described N number of pixel, forward step S903 to.
S903, the display subregion determining belonging to pixel.After determining the display subregion belonging to pixel, forward step S904 to.
The GTG of S904, display subregion belonging to described pixel and described image pixel, the offset data table that inquiry is preset, determines the offset that described pixel is corresponding.After determining the offset that described pixel is corresponding, forward step S905 to.
Wherein, in described offset data table, each display subregion is provided with often kind of each self-corresponding offset of GTG; The display subregion of described pixel, refers to and is obtained by the regular partition of the viewing area of a two field picture according to setting.
Further, can be the same or different for the offset that the GTG of all kinds of each display subregion setting is corresponding in described offset data table.
The GTG of offset to described pixel of the described pixel that S905, basis are determined compensates.
In addition, for preventing the image data illumination sudden change after compensating uneven, after according to the offset of described view data described view data being compensated, also can for the first pixel after compensation, if there is the second pixel meeting first condition in the neighbor of described first pixel, then judge whether the absolute value of the difference of the grey decision-making after the grey decision-making after described first pixel compensation and described second pixel compensation is greater than setting threshold value, if, then the grey decision-making after described first pixel compensation is adjusted, to reduce the absolute value of the difference between the grey decision-making after described first pixel adjustment and the grey decision-making after described second pixel compensation, wherein, described first condition is: the grey decision-making before described second pixel compensation is equal with the grey decision-making before described first pixel compensation.
Such as, pixel P5 and the P6 in a frame image data is adjacent, and the grey decision-making of P5 and P6 before compensation is identical, is 200.The offset of pixel P5 is 2 GTGs, the offset of pixel P6 is 20 GTGs, after then compensating, the grey decision-making of pixel P5 is 202, after compensating, the grey decision-making of pixel P6 is 220, suppose that the threshold value set is 5, then pixel P5 compensate after grey decision-making and pixel P6 compensate after the absolute value of difference of grey decision-making be 18, due to 18 threshold values 5 being greater than setting, then the grey decision-making after pixel 5 compensation is adjusted, such as, the grey decision-making of pixel 5 is adjusted to 18.
For preventing the image data illumination sudden change after compensating uneven, before according to the offset of described view data described view data being compensated, be after the first pixel determines offset, if there is the second pixel meeting second condition in the neighbor of described first pixel, then judge whether the absolute value of the difference of the offset of described first pixel and the offset of described second pixel is greater than setting threshold value, if, then the offset of described first pixel is adjusted, to reduce the absolute value of the difference between the offset after described first pixel adjustment and the offset of described second pixel, wherein, described second condition is: the grey decision-making before described second pixel compensation is equal with the grey decision-making before described first pixel compensation.
Such as, pixel P7 and the P8 in a frame image data is adjacent, and the grey decision-making of P7 and P8 before compensation is identical, is 200.Determine that the offset of pixel P7 is 2 GTGs, the offset of pixel P8 is 20 GTGs, then absolute value 18 GTG of the difference of the offset of pixel P7 and the offset of pixel P8, suppose that the threshold value set is 5, then can adjust the offset of pixel P7, such as, the offset of pixel P7 is adjusted to 18 GTGs.
In addition, can compensate view data to be shown in application end, the application end of such as mobile phone; Also can compensate view data to be shown in the integrated drive electronics part of panel.
The gray level compensation method of the view data that above-described embodiment provides, comprising: receive view data to be shown, and described view data comprises the GTG of N number of pixel of a two field picture, and N is greater than 1; For each pixel in described N number of pixel, determine the display subregion belonging to pixel; Display subregion belonging to described pixel and the GTG of described image pixel, the offset data table that inquiry is preset, determines the offset that described pixel is corresponding; The GTG of offset to described pixel according to the described pixel determined compensates, first, measured by data, set up offset data table, according to the offset data table set up, correction is compensated to the luma data of display screen actual displayed, thus realizes the flicker optimization of any viewing area of whole display panel, and then eliminate the flicker of whole display panel generation.And different according to the offset stored in tables of data, can have different compensation ways, compensate for slower is flexible.In addition, also can smoothingly process after the view data received is compensated or before compensating, thus the problem of the jump in brightness inequality of generation after preventing from compensating.
Based on identical technical conceive, the embodiment of the present invention also provides a kind of gray scale compensation device of view data, and the gray scale compensation device of this view data can perform said method embodiment.
Figure 10 a, the structural representation of the gray scale compensation device of the view data provided for the embodiment of the present invention.As shown in Figure 10 a, this device can comprise: micro-control module MCU11 and data table memory 12; Wherein, MCU11 comprises receiving element 101, processing unit 102 and compensating unit 103;
Receiving element 101, for receiving view data to be shown, described view data comprises the GTG of N number of pixel of a two field picture, and N is greater than 1;
Data table memory 12, for storing offset data table;
Processing unit 102, for for each pixel in described N number of pixel, performs following steps:
Determine the display subregion belonging to pixel;
Display subregion belonging to described pixel and the GTG of described image pixel, the offset data table that inquiry is preset, determines the offset that described pixel is corresponding;
Compensating unit 103, for compensating according to the GTG of offset to described pixel of the described pixel determined.
Wherein, in described offset data table, each display subregion is provided with often kind of each self-corresponding offset of GTG; The display subregion of described pixel, refers to and is obtained by the regular partition of the viewing area of a two field picture according to setting.
Preferably, show subregion to refer on liquid crystal module LCM display panel the region that viewing area is segmented according to the rule of setting;
In described offset data table, the offset in the i-th display subregion corresponding to jth GTG obtains in the following manner, and 1≤i≤X, 1≤j≤Y, X is the quantity of display subregion, and Y is the quantity of GTG:
Under the different voltages being positioned at the public electrode corresponding to the display subregion of display panel central area, measure the display effect of GTG in the middle of the display of this display subregion, obtain the first magnitude of voltage of this public electrode during optimal display result;
Under the different voltages of the public electrode corresponding to the i-th display subregion, measure the display effect of the i-th display subregion display jth GTG, obtain the second magnitude of voltage of this public electrode during optimal display result;
According to described first magnitude of voltage and described second magnitude of voltage, determine the offset that in the i-th display subregion, jth GTG is corresponding.
Preferably, in described offset data table, in the i-th display subregion, offset corresponding to jth GTG deducts grey decision-making corresponding to difference that described first magnitude of voltage obtains for: described second magnitude of voltage;
Compensating unit 103, adopts the first compensation way during specifically for compensating described view data according to the offset of described view data;
Described first compensation way is specially:
Compensate according to the first formula, described first formula is:
G’＝G+ΔG
Wherein, G ' is the grey decision-making of pixel in view data after compensating; G is the grey decision-making of the described pixel before compensating, and Δ G is the offset of described pixel.
Preferably, in described offset data table, in the i-th display subregion offset corresponding to jth GTG for: described second magnitude of voltage deducts the grey decision-making corresponding to the twice of the difference that described first magnitude of voltage obtains;
Compensating unit 103, specifically for adopting the second compensation way or the 3rd compensation way when compensating described view data according to the offset of described view data;
Described second compensation way specifically comprises:
Determine whether the grey decision-making of the pixel in described view data is greater than the grey decision-making corresponding to magnitude of voltage of the public electrode of this pixel region, if so, then compensate according to the grey decision-making of the second formula to described pixel;
Described 3rd compensation way specifically comprises:
Determine whether the grey decision-making of the pixel in described view data is less than the grey decision-making corresponding to magnitude of voltage of the public electrode of this pixel region, if so, then compensate according to the grey decision-making of described second formula to described pixel;
Described second formula is: G '=G+ Δ G '
Wherein, G ' is the grey decision-making of pixel in view data after compensating; G is the grey decision-making of the described pixel before compensating, and Δ G ' is the offset inquired from described offset data table.
Preferably, in described offset data table, in the i-th display subregion, offset corresponding to jth GTG deducts grey decision-making corresponding to difference that described first magnitude of voltage obtains for: described second magnitude of voltage;
Processing unit 102, specifically for determining the compensation way adopted for described view data;
Compensating unit 103, specifically for compensating described view data according to the compensation way determined, wherein:
If determine employing first compensation way, then compensate according to the first formula, described first formula is:
G’＝G+ΔG
Wherein, G ' is the grey decision-making of pixel in view data after compensating; G is the grey decision-making of the described pixel before compensating, and Δ G is the offset inquired from described offset data table;
If determine employing second compensation way, described second compensation way specifically comprises:
Determine whether the grey decision-making of the pixel in described view data is greater than the grey decision-making corresponding to magnitude of voltage of the public electrode of this pixel region, if so, then compensate according to the grey decision-making of the second formula to described pixel;
If determine employing the 3rd compensation way, described 3rd compensation way specifically comprises:
Determine whether the grey decision-making of the pixel in described view data is less than the grey decision-making corresponding to magnitude of voltage of the public electrode of this pixel region, if so, then compensate according to the grey decision-making of described second formula to described pixel;
Described second formula is:
G’＝G+2×ΔG’
Wherein, G ' is the grey decision-making of pixel in view data after compensating; G is the grey decision-making of the described pixel before compensating, and Δ G is the offset inquired from described offset data table.
Preferably, MCU11 also can comprise: the first smoothing processing unit 104.
10b, for MCU11 comprises the structural representation of receiving element 101, processing unit 102, compensating unit 103 and the first smoothing processing unit 104.
As shown in fig. lob, first smoothing processing unit 104, after described view data being compensated according to the offset of described view data at described compensating unit, for the first pixel after compensation, if there is the second pixel meeting first condition in the neighbor of described first pixel, then judge whether the absolute value of the difference of the grey decision-making after the grey decision-making after described first pixel compensation and described second pixel compensation is greater than setting threshold value, if, then the grey decision-making after described first pixel compensation is adjusted, to reduce the absolute value of the difference between the grey decision-making after described first pixel adjustment and the grey decision-making after described second pixel compensation, wherein, described first condition is: the grey decision-making before described second pixel compensation is equal with the grey decision-making before described first pixel compensation.
Preferably, MCU also can comprise: the second smoothing processing unit 105.
10c, for MCU11 comprises the structural representation of receiving element 101, processing unit 102, compensating unit 103 and the second smoothing processing unit 105.
As shown in figure l oc, second smoothing processing unit 105, before described view data being compensated according to the offset of described view data at described compensating unit, described processing unit is after the first pixel determines offset, if there is the second pixel meeting second condition in the neighbor of described first pixel, then judge whether the absolute value of the difference of the offset of described first pixel and the offset of described second pixel is greater than setting threshold value, if, then the offset of described first pixel is adjusted, to reduce the absolute value of the difference between the offset after described first pixel adjustment and the offset of described second pixel, wherein, described second condition is: the grey decision-making before described second pixel compensation is equal with the grey decision-making before described first pixel compensation.
Preferably, processing unit 102, specifically for: the display subregion belonging to described pixel and the GTG of described image pixel, the offset data table that inquiry is preset, obtains the offset that described pixel is corresponding;
Wherein, for each display subregion and often kind of GTG in described offset data table, be provided with the grey decision-making corresponding to best public electrode voltages value when this display subregion shows this kind of GTG, display subregion refers on liquid crystal module LCM display panel the region that viewing area is segmented according to the rule of setting;
In described offset data table, the best public electrode voltages value that in i-th display subregion, jth GTG is corresponding is, under the different voltages of the public electrode corresponding to the i-th display subregion, measure the display effect of the i-th display subregion display jth GTG, obtain the magnitude of voltage of this public electrode during optimal display result.
Preferably, processing unit 102, specifically for:
For each pixel in described N number of pixel, perform following steps:
Determine the display subregion belonging to pixel;
Display subregion belonging to described pixel and the GTG of described image pixel, inquire about described offset data table;
According to the grey decision-making corresponding to the best public electrode voltages of the grey decision-making inquired and display panel central area, determine the offset of described pixel;
Wherein, the best public electrode voltages of described display panel central area measures in the following manner: under the different voltages being positioned at the public electrode corresponding to the viewing area of display panel central area, measure the display effect of GTG in the middle of the display of this display subregion, obtain the magnitude of voltage of this public electrode during optimal display result.
Preferably, compensating unit 103 is totalizer.
In sum, the gray level compensation method of the view data that the embodiment of the present invention provides and device, comprising: receive view data to be shown, and described view data comprises the GTG of N number of pixel of a two field picture, and N is greater than 1; For each pixel in described N number of pixel, determine the display subregion belonging to pixel; Display subregion belonging to described pixel and the GTG of described image pixel, the offset data table that inquiry is preset, determines the offset that described pixel is corresponding; The GTG of offset to described pixel according to the described pixel determined compensates, first, measured by data, set up offset data table, according to the offset data table set up, correction is compensated to the luma data of display screen actual displayed, thus realizes the flicker optimization of any viewing area of whole display panel, and then eliminate the flicker of whole display panel generation.And different according to the offset stored in tables of data, can have different compensation ways, compensate for slower is flexible.In addition, also can smoothingly process after the view data received is compensated or before compensating, thus the problem of the jump in brightness inequality of generation after preventing from compensating.
The present invention describes with reference to according to the process flow diagram of the method for the embodiment of the present invention, equipment (system) and computer program and/or block scheme.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block scheme and/or square frame and process flow diagram and/or block scheme and/or square frame.These computer program instructions can being provided to the processor of multi-purpose computer, special purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computing machine or other programmable data processing device produce device for realizing the function of specifying in process flow diagram flow process or multiple flow process and/or block scheme square frame or multiple square frame.
These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in process flow diagram flow process or multiple flow process and/or block scheme square frame or multiple square frame.
These computer program instructions also can be loaded in computing machine or other programmable data processing device, make on computing machine or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computing machine or other programmable devices is provided for the step realizing the function of specifying in process flow diagram flow process or multiple flow process and/or block scheme square frame or multiple square frame.
Although describe the preferred embodiments of the present invention, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the scope of the invention.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.

Claims (19)

1. a gray level compensation method for view data, is characterized in that, comprising:
Receive view data to be shown, described view data comprises the GTG of N number of pixel of a two field picture, and N is greater than 1;
For each pixel in described N number of pixel, perform following steps:
Determine the display subregion belonging to pixel;
Display subregion belonging to described pixel and the GTG of described image pixel, the offset data table that inquiry is preset, determines the offset that described pixel is corresponding;
The GTG of offset to described pixel according to the described pixel determined compensates;
Wherein, in described offset data table, each display subregion is provided with often kind of each self-corresponding offset of GTG; The display subregion of described pixel, refers to and is obtained by the regular partition of the viewing area of a two field picture according to setting.
2. the method for claim 1, is characterized in that, display subregion refers on a display panel to the region that viewing area is segmented according to the rule of setting;
In described offset data table, the offset in the i-th display subregion corresponding to jth GTG obtains in the following manner, and 1≤i≤X, 1≤j≤Y, X is the quantity of display subregion, and Y is the quantity of GTG:
Under the different voltages being positioned at the public electrode corresponding to the display subregion of display panel central area, measure the display effect of GTG in the middle of the display of this display subregion, obtain the first magnitude of voltage of this public electrode during optimal display result;
Under the different voltages of the public electrode corresponding to the i-th display subregion, measure the display effect of the i-th display subregion display jth GTG, obtain the second magnitude of voltage of this public electrode during optimal display result;
According to described first magnitude of voltage and described second magnitude of voltage, determine the offset that in the i-th display subregion, jth GTG is corresponding.
3. method as claimed in claim 2, is characterized in that, in described offset data table, the offset in the i-th display subregion corresponding to jth GTG deducts the grey decision-making corresponding to the difference that described first magnitude of voltage obtains for: described second magnitude of voltage; When described view data being compensated according to the offset of described view data, adopt the first compensation way;
Described first compensation way is specially:
Compensate according to the first formula, described first formula is:
G’＝G+ΔG
Wherein, G ' is the grey decision-making of pixel in view data after compensating; G is the grey decision-making of the described pixel before compensating, and Δ G is the offset inquired from described offset data table.
4. method as claimed in claim 2, is characterized in that, in described offset data table, the offset in the i-th display subregion corresponding to jth GTG for: described second magnitude of voltage deducts the grey decision-making corresponding to the twice of the difference that described first magnitude of voltage obtains; When described view data being compensated according to the offset of described view data, adopt the second compensation way or the 3rd compensation way;
Described second compensation way specifically comprises:
Determine whether the grey decision-making of the pixel in described view data is greater than the grey decision-making corresponding to magnitude of voltage of the public electrode of this pixel region, if so, then compensate according to the grey decision-making of the second formula to described pixel;
Described 3rd compensation way specifically comprises:
Determine whether the grey decision-making of the pixel in described view data is less than the grey decision-making corresponding to magnitude of voltage of the public electrode of this pixel region, if so, then compensate according to the grey decision-making of described second formula to described pixel;
Described second formula is: G '=G+ Δ G '
Wherein, G ' is the grey decision-making of pixel in view data after compensating; G is the grey decision-making of the described pixel before compensating, and Δ G ' is the offset inquired from described offset data table.
5. method as claimed in claim 2, is characterized in that, in described offset data table, the offset in the i-th display subregion corresponding to jth GTG deducts the grey decision-making corresponding to the difference that described first magnitude of voltage obtains for: described second magnitude of voltage;
The described offset according to described view data compensates described view data, comprising:
Determine the compensation way adopted for described view data, according to the compensation way determined, described view data is compensated, wherein:
If determine employing first compensation way, then compensate according to the first formula, described first formula is:
G’＝G+ΔG
Wherein, G ' is the grey decision-making of pixel in view data after compensating; G is the grey decision-making of the described pixel before compensating, and Δ G is the offset inquired from described offset data table;
If determine employing second compensation way, then judge whether the grey decision-making of the pixel in described view data is greater than the grey decision-making corresponding to magnitude of voltage of the public electrode of this pixel region, if so, then compensate according to the grey decision-making of the second formula to described pixel;
If determine employing the 3rd compensation way, then judge whether the grey decision-making of the pixel in described view data is less than the grey decision-making corresponding to magnitude of voltage of the public electrode of this pixel region, if so, then compensate according to the grey decision-making of described second formula to described pixel;
Described second formula is:
G’＝G+2×ΔG
Wherein, G ' is the grey decision-making of pixel in view data after compensating; G is the grey decision-making of the described pixel before compensating, and Δ G is the offset inquired from described offset data table.
6. the method according to any one of claim 1 to 5, is characterized in that, the described offset according to described view data also comprises after compensating described view data:
For the first pixel after compensation, if there is the second pixel meeting first condition in the neighbor of described first pixel, then judge whether the absolute value of the difference of the grey decision-making after the grey decision-making after described first pixel compensation and described second pixel compensation is greater than setting threshold value, if, then the grey decision-making after described first pixel compensation is adjusted, to reduce the absolute value of the difference between the grey decision-making after described first pixel adjustment and the grey decision-making after described second pixel compensation; Wherein, described first condition is: the grey decision-making before described second pixel compensation is equal with the grey decision-making before described first pixel compensation.
7. the method for claim 1, is characterized in that, the described offset according to described view data also comprises before compensating described view data:
Be after the first pixel determines offset, if there is the second pixel meeting second condition in the neighbor of described first pixel, then judge whether the absolute value of the difference of the offset of described first pixel and the offset of described second pixel is greater than setting threshold value, if, then the offset of described first pixel is adjusted, to reduce the absolute value of the difference between the offset after described first pixel adjustment and the offset of described second pixel; Wherein, described second condition is: the grey decision-making before described second pixel compensation is equal with the grey decision-making before described first pixel compensation.
8. the method for claim 1, is characterized in that, the display subregion belonging to described pixel and the GTG of described image pixel, determines the offset of described pixel, specifically comprises:
Display subregion belonging to described pixel and the GTG of described image pixel, the offset data table that inquiry is preset, obtains the offset that described pixel is corresponding;
Wherein, for each display subregion and often kind of GTG in described offset data table, be provided with the grey decision-making corresponding to best public electrode voltages value when this display subregion shows this kind of GTG, display subregion refers on liquid crystal module LCM display panel the region that viewing area is segmented according to the rule of setting;
The best public electrode voltages value that in i-th display subregion, jth GTG is corresponding is, under the different voltages of the public electrode corresponding to the i-th display subregion, measure the display effect of the i-th display subregion display jth GTG, obtain the magnitude of voltage of this public electrode during optimal display result.
9. method as claimed in claim 8, is characterized in that, the offset data table that inquiry is preset obtains the offset of described view data, specifically comprises:
For each pixel in described N number of pixel, perform following steps:
Determine the display subregion belonging to pixel;
Display subregion belonging to described pixel and the GTG of described image pixel, inquire about described offset data table;
According to the grey decision-making corresponding to the best public electrode voltages of the grey decision-making inquired and display panel central area, determine the offset of described pixel;
Wherein, the best public electrode voltages of described display panel central area measures in the following manner: under the different voltages being positioned at the public electrode corresponding to the viewing area of display panel central area, measure the display effect of GTG in the middle of the display of this display subregion, obtain the magnitude of voltage of this public electrode during optimal display result.
10. a gray scale compensation device for view data, is characterized in that, this device comprises: micro-control module MCU and data table memory; Wherein, described MCU comprises receiving element, processing unit and compensating unit;
Described receiving element, for receiving view data to be shown, described view data comprises the GTG of N number of pixel of a two field picture, and N is greater than 1;
Described data table memory, for storing offset data table;
Described processing unit, for for each pixel in described N number of pixel, performs following steps:
Determine the display subregion belonging to pixel;
Display subregion belonging to described pixel and the GTG of described image pixel, the offset data table that inquiry is preset, determines the offset that described pixel is corresponding;
Described compensating unit, for compensating according to the GTG of offset to described pixel of the described pixel determined;
Wherein, in described offset data table, each display subregion is provided with often kind of each self-corresponding offset of GTG; The display subregion of described pixel, refers to and is obtained by the regular partition of the viewing area of a two field picture according to setting.
11. devices as claimed in claim 10, is characterized in that, display subregion refers on liquid crystal module LCM display panel the region that viewing area is segmented according to the rule of setting;
In described offset data table, the offset in the i-th display subregion corresponding to jth GTG obtains in the following manner, and 1≤i≤X, 1≤j≤Y, X is the quantity of display subregion, and Y is the quantity of GTG:
Under the different voltages being positioned at the public electrode corresponding to the display subregion of display panel central area, measure the display effect of GTG in the middle of the display of this display subregion, obtain the first magnitude of voltage of this public electrode during optimal display result;
Under the different voltages of the public electrode corresponding to the i-th display subregion, measure the display effect of the i-th display subregion display jth GTG, obtain the second magnitude of voltage of this public electrode during optimal display result;
According to described first magnitude of voltage and described second magnitude of voltage, determine the offset that in the i-th display subregion, jth GTG is corresponding.
12. devices as described in right 11, is characterized in that, in described offset data table, the offset in the i-th display subregion corresponding to jth GTG deducts the grey decision-making corresponding to the difference that described first magnitude of voltage obtains for: described second magnitude of voltage;
Described compensating unit, adopts the first compensation way during specifically for compensating described view data according to the offset of described view data;
Described first compensation way is specially:
Compensate according to the first formula, described first formula is:
G’＝G+ΔG
Wherein, G ' is the grey decision-making of pixel in view data after compensating; G is the grey decision-making of the described pixel before compensating, and Δ G is the offset of described pixel.
13. devices as claimed in claim 11, is characterized in that, in described offset data table, in the i-th display subregion offset corresponding to jth GTG for: described second magnitude of voltage deducts the grey decision-making corresponding to the twice of the difference that described first magnitude of voltage obtains;
Described compensating unit, specifically for adopting the second compensation way or the 3rd compensation way when compensating described view data according to the offset of described view data;
Described second compensation way specifically comprises:
Determine whether the grey decision-making of the pixel in described view data is greater than the grey decision-making corresponding to magnitude of voltage of the public electrode of this pixel region, if so, then compensate according to the grey decision-making of the second formula to described pixel;
Described 3rd compensation way specifically comprises:
Determine whether the grey decision-making of the pixel in described view data is less than the grey decision-making corresponding to magnitude of voltage of the public electrode of this pixel region, if so, then compensate according to the grey decision-making of described second formula to described pixel;
Described second formula is: G '=G+ Δ G '
Wherein, G ' is the grey decision-making of pixel in view data after compensating; G is the grey decision-making of the described pixel before compensating, and Δ G ' is the offset inquired from described offset data table.
14. devices as claimed in claim 11, is characterized in that, in described offset data table, in the i-th display subregion, offset corresponding to jth GTG deducts grey decision-making corresponding to difference that described first magnitude of voltage obtains for: described second magnitude of voltage;
Described processing unit, specifically for determining the compensation way adopted for described view data;
Described compensating unit, specifically for compensating described view data according to the compensation way determined, wherein:
If determine employing first compensation way, then compensate according to the first formula, described first formula is:
G’＝G+ΔG
Wherein, G ' is the grey decision-making of pixel in view data after compensating; G is the grey decision-making of the described pixel before compensating, and Δ G is the offset inquired from described offset data table;
If determine employing second compensation way, described second compensation way specifically comprises:
Determine whether the grey decision-making of the pixel in described view data is greater than the grey decision-making corresponding to magnitude of voltage of the public electrode of this pixel region, if so, then compensate according to the grey decision-making of the second formula to described pixel;
If determine employing the 3rd compensation way, described 3rd compensation way specifically comprises:
Determine whether the grey decision-making of the pixel in described view data is less than the grey decision-making corresponding to magnitude of voltage of the public electrode of this pixel region, if so, then compensate according to the grey decision-making of described second formula to described pixel;
Described second formula is:
G’＝G+2×ΔG’
Wherein, G ' is the grey decision-making of pixel in view data after compensating; G is the grey decision-making of the described pixel before compensating, and Δ G is the offset inquired from described offset data table.
15. devices as described in any one of claim 10-14, it is characterized in that, described MCU also comprises: the first smoothing processing unit;
Described first smoothing processing unit, after described view data being compensated according to the offset of described view data at described compensating unit, for the first pixel after compensation, if there is the second pixel meeting first condition in the neighbor of described first pixel, then judge whether the absolute value of the difference of the grey decision-making after the grey decision-making after described first pixel compensation and described second pixel compensation is greater than setting threshold value, if, then the grey decision-making after described first pixel compensation is adjusted, to reduce the absolute value of the difference between the grey decision-making after described first pixel adjustment and the grey decision-making after described second pixel compensation, wherein, described first condition is: the grey decision-making before described second pixel compensation is equal with the grey decision-making before described first pixel compensation.
16. devices as claimed in claim 10, it is characterized in that, described MCU also comprises: the second smoothing processing unit;
Described second smoothing processing unit, before described view data being compensated according to the offset of described view data at described compensating unit, described processing unit is after the first pixel determines offset, if there is the second pixel meeting second condition in the neighbor of described first pixel, then judge whether the absolute value of the difference of the offset of described first pixel and the offset of described second pixel is greater than setting threshold value, if, then the offset of described first pixel is adjusted, to reduce the absolute value of the difference between the offset after described first pixel adjustment and the offset of described second pixel, wherein, described second condition is: the grey decision-making before described second pixel compensation is equal with the grey decision-making before described first pixel compensation.
17. devices as claimed in claim 10, is characterized in that, described processing unit, specifically for: the display subregion belonging to described pixel and the GTG of described image pixel, the offset data table that inquiry is preset, obtains the offset that described pixel is corresponding;
Wherein, for each display subregion and often kind of GTG in described offset data table, be provided with the grey decision-making corresponding to best public electrode voltages value when this display subregion shows this kind of GTG, display subregion refers on liquid crystal module LCM display panel the region that viewing area is segmented according to the rule of setting;
In described offset data table, the best public electrode voltages value that in i-th display subregion, jth GTG is corresponding is, under the different voltages of the public electrode corresponding to the i-th display subregion, measure the display effect of the i-th display subregion display jth GTG, obtain the magnitude of voltage of this public electrode during optimal display result.
18. devices as claimed in claim 17, is characterized in that, described processing unit, specifically for:
For each pixel in described N number of pixel, perform following steps:
Determine the display subregion belonging to pixel;
Display subregion belonging to described pixel and the GTG of described image pixel, inquire about described offset data table;
According to the grey decision-making corresponding to the best public electrode voltages of the grey decision-making inquired and display panel central area, determine the offset of described pixel;
Wherein, the best public electrode voltages of described display panel central area measures in the following manner: under the different voltages being positioned at the public electrode corresponding to the viewing area of display panel central area, measure the display effect of GTG in the middle of the display of this display subregion, obtain the magnitude of voltage of this public electrode during optimal display result.
19. devices as claimed in claim 11, it is characterized in that, described compensating unit is totalizer.
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