CN103474016B - Subregion drives processing method, processes device and display - Google Patents
Subregion drives processing method, processes device and display Download PDFInfo
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Abstract
The present invention provides a kind of subregion to drive processing method, process device and display, different partition compensation and the lifting to analog reference voltage is carried out by subregion Gamma Table, realize carrying out omnibearing Gamma compensation in vertical direction, realize the brightness of picture in vertical direction consistent, thus the signal delay up and down solving 4K2K display screen causes more greatly the picture brightness uniformity problem of upper and lower picture undercharge and the problem of the upper and lower crosstalk of picture under 3D。
Description
Technical field
The present invention relates to screen display technology, particularly relate to a kind of subregion and drive processing method, process device and display。
Background technology
In recent years, along with developing rapidly of screen display technology, the appearance of revolutionary technology again and again, from cathode ray tube ((CathodeRayTube；It is called for short CRT) to liquid crystal display (LiquidCrystalDisplay；It being called for short LCD) technology, from Cold Cathode Fluorescent fluorescent tube, (ColdCathodeFluorescentLamp is called for short: CCFL) backlight is to the light emitting diode (LightEmittingDiode of energy-conservation slimming；Be called for short: LED) product, the technical products from 2D to 3D, new Display Technique updates and all brings very big economy and market efficiency to manufacturer each time。This makes increasing enterprise take the lead in starting thinking and preparing technology and the product in " rear plate TV epoch ", in display field, the next generation can play again what revolutionary technology is？The superelevation image technology end product of 4K × 2K and bore hole 3D technical products will become two big new highlights of flat panel display development。
Large size electro screen, owing to the visual field of its super large makes beholder there is sense of reality on the spot in person and telepresenc, but full HD (FullHighDefinition current on the display screen of this super large；It is called for short: the FHD) display of resolution, it appears picture is relatively rough, the requirement that picture is finely felt by people and definition is increasingly higher simultaneously so that 4K × 2K super-resolution degree technology is arisen at the historic moment。The multiple views technology that 3D Display Technique of future generation and bore hole 3D show simultaneously can make the resolution of viewing reduce, the demand of 4K × 2K super-resolution degree technology is also extremely urgent by it, it may be said that a large amount of universal of bore hole 3D technology of future generation is also built upon on 4K × 2K super-resolution degree technology。
4K × 2K, it is exactly the four times of resolution rates having reached existing 1080p, reach the resolution of 3840x2160, calculate from pixel quantity, the picture pixel of 1080p adds up to 1920 × 1080=2073600, and the Pixel Information of " 4K × 2K " is 3840 × 2160=8294400 or 4096 × 2160=8847360。Rear both have basically reached the former 4 times, therefore only from the meaning of picture pixel, possess the content of the display device of " 4K × 2K " resolution similar 4 times of the many displays of equipment than tradition 1080p。
Fig. 1 is the schematic diagram of the vertical four subregion frameworks of prior art, and existing display screen is generally adopted the framework of vertical four subregions, as it is shown in figure 1, display screen is divided into four districts in the horizontal direction, I district is responsible for 1 to 960 bars of lines of level, and vertical direction is 0 to 2160；Ii district is responsible for 961 to 1080 lines of level, and vertical direction is 0 to 2160；Ii I district is responsible for 1081 to 2880 lines of level, and vertical direction is 0 to 2160；Iv district is responsible for 2881 to 3840 lines of level, and vertical direction is 0 to 2160。So pixel (Pixel) quantity becomes the twice of 1080p display screen in vertical direction, driving line number on circuit is increased, equiva lent impedance and the capacitive reactance of each section are bigger, make the driving signal difference at most starting end (one end near drive circuit) and most terminal (one end away from drive circuit) very big, make picture bigger in upper and lower two ends signal delay, specifically the driving signal of starting end is not owing to having distortion, therefore the driving voltage value of setting will be arrived immediately at the rising edge place driving signal, and most terminal drives signal to there is distortion because of the impact being subject to equiva lent impedance and capacitive reactance, therefore the driving voltage value of setting can't be arrived immediately at the rising edge place driving signal, but delaying by a period of time, therefore upper and lower picture undercharge occurs, so that there is upper and lower brightness irregularities in picture, particularly in 3D state, upper and lower picture is occurred, and crosstalk is very big。
Therefore, how to solve to cause that the defect of brightness disproportionation becomes the important topic that industry is urgently to be resolved hurrily because of the undercharge of picture up and down of such as 4K2K display screen。
Summary of the invention
The present invention is directed to the defect of prior art, it is provided that a kind of subregion drives processing method, processes device and display。
Subregion provided by the invention drives processing method, including:
Display picture is vertically divided into m horizontal partitioning, m >=2, it is respectively provided with one first tables of data for each horizontal partitioning, described first tables of data includes the pixel of different GTG and is distinguished the compensation of corresponding RGB, and the compensation of the RGB corresponding to pixel having same gray level in the first tables of data corresponding to each horizontal partitioning vertically incrementally increases；
According to the first tables of data that each horizontal partitioning is corresponding, obtain the compensation of RGB corresponding to object pixel；
Compensation according to RGB corresponding to described object pixel obtains corresponding driving voltage, and carries out picture and show
Subregion driving provided by the invention processes device, including:
Module is set, for display picture is vertically divided into m horizontal partitioning, m >=2, it is respectively provided with one first tables of data for each horizontal partitioning, described first tables of data includes the pixel of different GTG and is distinguished the compensation of corresponding RGB, and the compensation of the RGB corresponding to pixel having same gray level in the first tables of data corresponding to each horizontal partitioning vertically incrementally increases；
Acquisition module, for first tables of data corresponding according to each horizontal partitioning, obtains the compensation of RGB corresponding to object pixel；
Display module, obtains corresponding driving voltage for the compensation according to RGB corresponding to described object pixel, and carries out picture and show。
Display provided by the invention include display screen and be connected with display screen, above-mentioned subregion driving process device。
Subregion provided by the invention drives processing method, processes device and display, by dividing a picture into multiple horizontal partitioning and each horizontal partitioning being carried out partition compensation, realize carrying out omnibearing Gamma compensation in vertical direction, realize the brightness of picture in vertical direction consistent, thus the signal delay up and down solving 4K2K display screen causes more greatly the picture brightness uniformity problem of upper and lower picture undercharge and the problem of the upper and lower crosstalk of picture under 3D。
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the vertical four subregion frameworks of prior art；
Fig. 2 is that subregion of the present invention drives processing method one embodiment flow chart
Fig. 3 is that subregion of the present invention drives another embodiment flow chart of processing method；
Fig. 4 is embodiment of the present invention display picture subregion schematic diagram；
Fig. 5 is present invention driver circuit system structure schematic diagram；
Fig. 6 is the T-V curve chart of the embodiment of the present invention；
Fig. 7 is schematic diagram after embodiment of the present invention subregion driving processes；
Fig. 8 is that subregion driving of the present invention processes apparatus structure schematic diagram。
Detailed description of the invention
Various embodiments of the present invention are for the defect causing brightness disproportionation in display screen big in prior art because of upper and lower picture undercharge, there is provided a solution namely by marking off multiple horizontal partitioning on the display picture of 4K2K, and adopt the balanced subregion Gamma processing method driven that the driving voltage of pixel each in each horizontal partitioning carries out the compensation deals of correspondence, and carry out picture show according to the driving voltage after compensating, signal delay up and down to solve 4K2K display screen causes more greatly the picture brightness uniformity problem of upper and lower picture undercharge, and the problem of the upper and lower crosstalk of picture under 3D。Should be noted that solution provided by the invention is not only applicable to the large scale display screens such as 4K2K or 8K2K (including but not limited to LCD TV and flat faced display), and can equally be well applied to the display screen of other sizes, hereinafter only illustrate for the display picture of 4K2K, but be not limited to this。
Fig. 2 is that subregion of the present invention drives processing method one embodiment flow chart, as in figure 2 it is shown, the method includes:
Step 200, display picture is vertically divided into m horizontal partitioning, m >=2, it is respectively provided with one first tables of data for each horizontal partitioning；
The first described tables of data includes the pixel of different GTG and is distinguished the compensation of corresponding RGB, and the compensation of the RGB corresponding to pixel having same gray level in the first tables of data corresponding to each horizontal partitioning vertically incrementally increases；
Wherein, the pixel of the different GTGs that the first tables of data includes the acquisition methods of compensation of RGB corresponding respectively include:
Determine horizontal partitioning k, 1≤k that pixel is positioned at≤m, determine in the first subregion synopsis and described brightness references tables of data k corresponding for horizontal partitioning k and k+1；Described first subregion synopsis includes the mark of two brightness references tables of data corresponding to each horizontal partitioning, each brightness references tables of data all includes the pixel of different GTG and is distinguished the compensation brightness reference value of corresponding RGB, and the compensation of the compensation of the RGB in the brightness references tables of data k+1 RGB corresponding to pixel than in reference data table k with same gray level is big；
Described brightness references tables of data k and k+1 searches the compensation brightness reference value obtaining the RGB corresponding with the GTG of described pixel, compensation brightness reference value according to the RGB obtained, and the numerical value of the base level scanning line of described horizontal partitioning k, it is thus achieved that the compensation of the RGB that described pixel is corresponding。
Step 201, according to the first tables of data corresponding to each horizontal partitioning, obtain the compensation of RGB corresponding to object pixel；
Specifically can include, receive the low voltage difference LVDS signal that described object pixel is corresponding, the first tables of data that object pixel according to described LVDS signal acquisition is corresponding, finds out the compensation of the RGB corresponding with the GTG of described object pixel in described first tables of data
Step 202, compensation according to RGB corresponding to described object pixel obtain corresponding driving voltage, and carry out picture and show。
Further, the present embodiment method can also include, it is respectively provided with one second tables of data for each horizontal partitioning, described second tables of data includes the pixel of different GTG and is distinguished corresponding analog reference voltage value, and the analog reference voltage value corresponding to pixel in the second tables of data corresponding to each horizontal partitioning vertically with same gray level incrementally increases。So correspondingly, step 202 then can specifically include:
The second tables of data that object pixel according to described LVDS signal acquisition is corresponding, finds out the analog reference voltage value corresponding with the GTG of described object pixel in described second tables of data；
Compensation according to RGB corresponding to described object pixel and described analog reference voltage value, obtain corresponding driving voltage, and carry out picture and show。
Wherein, the pixel of the different GTGs that the second tables of data includes the acquisition methods of analog reference voltage value corresponding respectively include:
Determine horizontal partitioning k, 1≤k that pixel is positioned at≤m, determine in the second subregion synopsis and described Voltage Reference tables of data k corresponding for horizontal partitioning k and k+1；Described second subregion synopsis includes the mark of two Voltage Reference tables of data corresponding to each horizontal partitioning, each Voltage Reference tables of data all includes the pixel of different GTG and is distinguished the analog reference voltage value of corresponding RGB, and the analog reference voltage value in Voltage Reference tables of data k+1 have the analog reference voltage value corresponding to pixel of same gray level than in Voltage Reference tables of data k big；
Search at Voltage Reference tables of data k and k+1 and obtain the analog reference voltage value corresponding with the GTG of described pixel, according to the analog reference voltage value obtained, and and described horizontal partitioning k base level scanning line numerical value, it is thus achieved that the analog reference voltage value that described pixel is corresponding。
Fig. 3 is that subregion of the present invention drives another embodiment flow chart of processing method, as it is shown on figure 3, the method includes:
Step 300, the low voltage difference LVDS signal that reception object pixel is corresponding, carry out described LVDS signal resolving the original luminance value obtaining RGB in described object pixel and valid data gating DE signal, determine that according to described DE signal horizontal scanning line n, the n at described object pixel place are natural number；
Fig. 4 is embodiment of the present invention display picture subregion schematic diagram, as shown in Figure 4, in the embodiment of the present invention, the display picture of 4K2K is vertically divided into m horizontal partitioning, m >=2。Vertical direction described in the embodiment of the present invention refers to close drive circuit one end to one end away from drive circuit in display picture。In the embodiment of the present invention, each horizontal partitioning is also respectively to there being first tables of data, and this first tables of data includes the pixel of different GTG and distinguished the compensation of corresponding RGB。The compensation of this RGB is it suffices that require as follows: after each pixel in display picture obtains corresponding driving voltage according to the compensation of this RGB, the display brightness of each horizontal partitioning is identical。The compensation of the RGB corresponding to pixel having same gray level in the first tables of data corresponding to each horizontal partitioning vertically specifically incrementally increases。It is appreciated that m horizontal partitioning corresponding respective first tables of data respectively, namely needs m the first tables of data of storage。
It is understandable that, the compensation of the RGB that certain GTG that the first described tables of data includes is corresponding, for each bar horizontal scanning line in corresponding horizontal partitioning has the compensation corresponding to the pixel of same gray level, namely, in this horizontal partitioning, two different horizontal scanning lines have the compensation of the corresponding identical RGB of pixel of same gray level。
Should be noted that the purpose in order to realize the display upper and lower brightness uniformity of picture, the compensation of the RGB corresponding to pixel having same gray level in the first tables of data corresponding to each horizontal partitioning from top to bottom incrementally increases。Such as, Table A is be located close to the first tables of data that the horizontal partitioning of drive circuit one end is corresponding, table B closes on Table A and away from the first tables of data corresponding to the horizontal partitioning of drive circuit one end, the compensation of the RGB that a certain GTG in table B is corresponding relative in Table A the compensation of the RGB that same GTG is corresponding want big。Certainly, being not to say that in table B, the compensation of the RGB that each GTG is corresponding is intended to the ratio big (such as the compensation of the RGB that 0 GTG is corresponding is 0) in Table A, simply has the variation tendency being stepped up。
After receiving a low voltage difference LVDS signal, the original luminance value of the pixel to be shown include this LVDS signal and the valid data gating DE signal of object pixel and RGB solves, then it is capable of determining that the horizontal scanning line n(n at this object pixel place is natural number according to the DE signal solved), namely drive circuit can determine according to DE signal and currently which bar horizontal line is scanned that (this is prior art, the present invention repeats no more), it is to be appreciated that object pixel is a pixel on this horizontal scanning line n。What the LVDS signal that is received carried is the original luminance value of the RGB of the activation bit of (or multiple) pixel and this pixel on the horizontal scanning line of nth bar。
Step 301, determine, according to described n, the horizontal partitioning that described object pixel is positioned at, and obtain first tables of data corresponding with described horizontal partitioning, the compensation finding out the RGB corresponding with the GTG of described object pixel in described first tables of data replaces described original luminance value and exports to digital to analog converter DAC, and the GTG of described object pixel is determined according to the original luminance value of RGB in described object pixel；
After determining, according to DE signal, the horizontal scanning line that object pixel is positioned at nth bar, just can determine which horizontal partitioning this object pixel is particularly located according to n。After determining the horizontal partitioning being positioned at, continue to obtain first tables of data corresponding with this horizontal partitioning, and search and the compensation of the RGB corresponding to the GTG of object pixel in the first tables of data obtained, then the original luminance value of RGB is replaced to export to digital to analog converter DAC with the compensation of this RGB。The embodiment of the present invention is, by the process of the compensation obtaining RGB of tabling look-up, the process that the original luminance value to RGB is adjusted compensating。
Table 1
Above table 1 is the embodiment of first tables of data, as shown in table 1, includes the numerical value being distinguished R, G, B of correspondence from the GTG of 0 to 255 in the first tables of data。For example, if the GTG 3 of a pixel, the then compensation of the RGB corresponding to this pixel respectively " 13,12,11 "。The GTG of pixel can be determined according to the original luminance value of the RGB of this pixel that LVDS signal includes。Specifically, the original luminance value of the RGB of the object pixel that drive circuit includes according to the LVDS signal received determines the GTG of this object pixel, the first tables of data corresponding to horizontal partitioning being arranged at this object pixel according to the GTG determined searches the compensation of the RGB corresponding to this GTG, then original luminance value is replaced to export to DAC with this compensation again, for described DAC computing driving voltage。
Step 302, the described DAC compensation according to RGB corresponding to described object pixel, obtains corresponding driving voltage, and carries out picture and show。
After DAC receives the compensation of the RGB of object pixel, obtain corresponding driving voltage, and in display screen, show the picture of this object pixel。
Subregion provided by the invention drives processing method, by display picture is vertically divided into multiple horizontal partitioning, and obtain first tables of data corresponding with each horizontal partitioning, the Gamma realizing corresponding horizontal partitioning by searching the compensation of the RGB in this first tables of data compensates, thus the problem that the signal delay up and down solving the such as 4K2K liquid crystal panel picture brightness that causes more greatly upper and lower picture undercharge and cause is uneven, problem with the upper and lower crosstalk of picture under 3D, it is achieved the brightness uniformity of picture in vertical direction。
Consider to be not easy to adopt GammaTable to compensate on a large scale at height ash exponent part, the basis of said method embodiment of the present invention can also carry out P-Gamm adjustment, it is achieved the delay of height GTG and the compensation of decline。Specifically, each horizontal partitioning is also respectively to there being one second tables of data, and this second tables of data includes the pixel of different GTG and distinguished corresponding analog reference voltage value；This analog reference voltage value is it suffices that require as follows: each pixel in display picture is according to after the compensation of RGB and the driving voltage of this analog reference voltage value acquisition correspondence, it is possible to the display brightness meeting each horizontal partitioning is identical。The analog reference voltage value corresponding to pixel in the second tables of data corresponding to each horizontal partitioning particularly and vertically with same gray level incrementally increases。
After determining, according to horizontal scanning line n, the horizontal partitioning that object pixel is positioned in the above-described embodiments, also to obtain second tables of data corresponding with this horizontal partitioning, and in the second tables of data, find out the analog reference voltage value corresponding with the GTG of object pixel and export to DAC；Described DAC, according to the compensation of RGB corresponding to object pixel and the analog reference voltage value obtained of tabling look-up, obtains corresponding driving voltage, and carries out picture and show。
Table 2
| GTG | TV-n |
| 0 | 15.59 |
| 4 | 13.09 |
| 64 | 11.67 |
| 128 | 11.39 |
| 192 | 10.96 |
| 252 | 8.69 |
| 255 | 8.12 |
| 255 | 7.865 |
| 252 | 7.62 |
| 192 | 5.54 |
| 128 | 5 |
| 64 | 4.77 |
| 4 | 2.968 |
| 0 | 0.358 |
Above table 2 is the embodiment of second tables of data, as shown in table 2, includes part gray-scale in the second tables of data and is distinguished the analog reference voltage value of correspondence。It is understood that the table 2 of the embodiment of the present invention can include the analog reference voltage value corresponding to 0 to 255 each GTG, now directly the analog reference voltage value corresponding with the GTG of object pixel can be obtained according to tabling look-up。Analog reference voltage value corresponding to part gray-scale (namely table 2 is) can certainly be only included, if now the GTG of object pixel has storage in table 2, then table look at corresponding analog reference voltage value can be obtained；If the GTG of object pixel does not store in table 2, then can be obtained by predetermined algorithm by the analog reference voltage value that two adjacent GTGs are corresponding, if for example the GTG of object pixel is 3, and not storing GTG in table 2 is the analog reference voltage value corresponding to 3, then obtains GTG 0 and 4 analog reference voltage value 15.59V and 13.09V corresponding respectively and calculate the analog reference voltage value obtaining GTG 3 correspondence。
It is understandable that, in the second described tables of data, the pixel of different GTGs is distinguished the analog reference voltage value of correspondence, for each bar horizontal scanning line in corresponding horizontal partitioning has the analog reference voltage value corresponding to the pixel of same gray level, namely, in this horizontal partitioning, two different horizontal scanning lines have the analog reference voltage value that the pixel of same gray level is corresponding identical。
Should be noted that the purpose in order to realize the display upper and lower brightness uniformity of picture, the analog reference voltage value corresponding to pixel in the second tables of data corresponding to each horizontal partitioning from top to bottom with same gray level incrementally increases。Such as, table C is located close to the second tables of data that the horizontal partitioning of drive circuit one end is corresponding, table D closes on table C and away from the second tables of data corresponding to the horizontal partitioning of drive circuit one end, and analog reference voltage value that a certain GTG in table D the is corresponding analog reference voltage value corresponding relative to GTG same in table C wants big。Certainly, corresponding analog reference voltage value is intended to the ratio big (the analog reference voltage value that such as 128 GTGs are corresponding is 5V) in table C to be not to say that in table D each GTG, simply has, at height ash exponent part, the variation tendency being stepped up。
In said method embodiment, the pixel of the different GTGs that the first tables of data includes the compensation of RGB corresponding respectively can obtain in the following way:
Horizontal partitioning k(1≤k≤m that object pixel is positioned at is determined according to n), the first subregion synopsis is determined the brightness references tables of data k corresponding with this horizontal partitioning k and k+1；This first subregion synopsis includes the mark of two brightness references tables of data corresponding to each horizontal partitioning, and each brightness references tables of data all includes the pixel of different GTG and distinguished the compensation brightness reference value of corresponding RGB；
Brightness references tables of data k and k+1 searching the compensation brightness reference value obtaining the RGB corresponding with the GTG of object pixel, and according to formula D=(D1+D2) * (n-X1)/(X2-X1) calculate the compensation of RGB corresponding to object pixel；Wherein, D is the compensation of the RGB that object pixel is corresponding, D1 is the compensation brightness reference value of RGB corresponding with the GTG of object pixel in brightness references tables of data k, D2 is the compensation brightness reference value of RGB corresponding with the GTG of object pixel in brightness references tables of data k+1, the numerical value of base level scanning line in X1 and X2 respectively horizontal partitioning k。
Table 3
Above table 3 is the embodiment of a first subregion synopsis, as shown in table 3, can search the mark of two brightness references tables of data corresponding to each horizontal partitioning according to this table 3。Such as, the mark of two brightness references tables of data corresponding to horizontal partitioning 3 respectively 3 and 4, brightness references tables of data 3 and brightness references tables of data 4 all include the pixel of different GTG and are distinguished the compensation brightness reference value of corresponding RGB。That is after determining the horizontal partitioning that object pixel is positioned at, the first subregion synopsis is searched according to this horizontal partitioning, it is thus achieved that brightness references tables of data 3 and brightness references tables of data 4；Then come by calculating the compensation obtaining RGB corresponding to this object pixel with the compensation brightness reference value corresponding with the GTG of object pixel in brightness references tables of data 4 according to brightness references tables of data 3。
The present invention can pass through the brightness value of m the horizontal partitioning tested under different GTG on 4K2K display picture, by the equal GTG finding out correspondence of the brightness of each horizontal partitioning, realize the luminance proportion of picture correspondence horizontal partitioning, draw GammaTable table and the brightness references tables of data of the horizontal partitioning of correspondence。
Table 4
Table 5
Above table 4 and table 5 are the embodiment of above-mentioned brightness references tables of data 3 and brightness references tables of data 4, as shown in table 4,5, what wherein store is the pixel of the different GTG compensation brightness reference value of being distinguished corresponding RGB, for instance the compensation brightness reference value 12 of the R that in brightness references tables of data 3, the pixel of GTG 3 is corresponding。
It should be noted that, brightness references tables of data 3 be to should the brightness references table of horizontal partitioning coboundary, brightness references tables of data 4 is to should the brightness references table of horizontal partitioning lower boundary。It is understood that brightness references tables of data 3 is simultaneously also for closing on this horizontal partitioning and away from the brightness references table of the coboundary corresponding to the horizontal partitioning of drive circuit one end, the rest may be inferred。It is understandable that, in order to realize the purpose of upper and lower brightness uniformity, the compensation of the RGB in the brightness references table of the lower boundary that arbitrary horizontal partitioning the is corresponding compensation than the RGB corresponding to pixel having same gray level in the brightness references table of corresponding coboundary is big, it is possible to know from table 4 and table 5。
According to table 4 and table 5, high gray part such as GTG 255 table 4 compensation reached the highest by 1023, now table 5 the RG part of GTG 255 cannot compensate in his-and-hers watches 4, supplementing of reference voltage level can be simulated in such cases, to realize the upper and lower brightness uniformity of picture according to the second tables of data。
In said method embodiment, the pixel of the different GTGs that the second tables of data includes analog reference voltage value corresponding respectively can obtain in the following way:
Determine horizontal partitioning k, 1≤k that object pixel is positioned at≤m according to n, the second subregion synopsis is determined the Voltage Reference tables of data k corresponding with horizontal partitioning k and k+1；Second subregion synopsis includes the mark of two Voltage Reference tables of data corresponding to each horizontal partitioning, and each Voltage Reference tables of data all includes the pixel of different GTG and distinguished the analog reference voltage value of corresponding RGB；
Voltage Reference tables of data k and k+1 searching and obtains the analog reference voltage value corresponding with the GTG of object pixel, and according to formula D=(D1+D2) * (n-X1)/(X2-X1) calculate the analog reference voltage value that described object pixel is corresponding；Wherein, D is the analog reference voltage value that described object pixel is corresponding, D1 is analog reference voltage value corresponding with the GTG of described object pixel in described Voltage Reference tables of data k, D2 is analog reference voltage value corresponding with the GTG of described object pixel in described Voltage Reference tables of data k+1, the numerical value of base level scanning line in X1 and X2 respectively described horizontal partitioning k。
Table 6
Above table 6 is the embodiment of a second subregion synopsis, as shown in table 6, can search the mark of two Voltage Reference tables of data corresponding to each horizontal partitioning according to this table 6。Such as, the mark of two Voltage Reference tables of data corresponding to horizontal partitioning 3 respectively 3 and 4, Voltage Reference tables of data 3 and Voltage Reference tables of data 4 all include the pixel of different GTG and are distinguished the analog reference voltage value of corresponding RGB。That is after determining the horizontal partitioning that object pixel is positioned at, the second subregion synopsis is searched according to this horizontal partitioning, it is thus achieved that Voltage Reference tables of data 3 and Voltage Reference tables of data 4；Then to obtain, by calculating, the analog reference voltage value that this object pixel is corresponding with the analog reference voltage value corresponding with the GTG of object pixel in Voltage Reference tables of data 4 according to Voltage Reference tables of data 3。
Table 7
| GTG | TV-3 |
| 0 | 15.18 |
| 4 | 12.18 |
| 64 | 11.67 |
| 128 | 11.39 |
| 192 | 10.96 |
| 252 | 8.88 |
| 255 | 8.24 |
| 255 | 7.77 |
| 252 | 7.47 |
| 192 | 5.54 |
| 128 | 5 |
| 64 | 4.77 |
| 4 | 3.936 |
| 0 | 0.616 |
Table 8
| GTG | TV-4 |
| 0 | 16 |
| 4 | 14 |
| 64 | 11.67 |
| 128 | 11.39 |
| 192 | 10.96 |
| 252 | 8.5 |
| 255 | 8 |
| 255 | 7.96 |
| 252 | 7.77 |
| 192 | 5.54 |
| 128 | 5 |
| 64 | 4.77 |
| 4 | 2 |
| 0 | 0.1 |
Above table 7 and table 8 are the embodiment of above-mentioned brightness references tables of data 3 and brightness references tables of data 4, as shown in table 7,8, what wherein store is that the pixel of different GTG is distinguished corresponding analog reference voltage value, for instance the analog reference voltage value that in brightness references tables of data 7, the pixel of GTG 4 is corresponding is 12.18V。
It should be noted that, Voltage Reference tables of data 3 be to should the Voltage Reference tables of data of horizontal partitioning coboundary, Voltage Reference tables of data 4 is to should the Voltage Reference tables of data of horizontal partitioning lower boundary。It is understood that Voltage Reference tables of data 3 is simultaneously also for closing on this horizontal partitioning and away from the Voltage Reference tables of data of the coboundary corresponding to the horizontal partitioning of drive circuit one end, the rest may be inferred。It is understandable that, in order to realize the purpose of upper and lower brightness uniformity, analog reference voltage value in the Voltage Reference tables of data of the lower boundary that arbitrary horizontal partitioning is corresponding the has same gray level analog reference voltage value corresponding to pixel in the Voltage Reference tables of data than corresponding coboundary is big, has, according to the analog reference voltage value that table 7 ash exponent part of telling good from bad known with table 8 is corresponding, the trend incrementally increased。
Certainly, the pixel of the different GTGs that the first tables of data includes is distinguished the compensation of the RGB of correspondence, and second the pixel of different GTGs that includes of tables of data analog reference voltage value corresponding respectively be not limited to above-mentioned acquisition methods, can also be stored directly according to conventional test data in the first tables of data and the second tables of data, above-mentioned being obtained by interpolation need not be carried out。
Fig. 5 is present invention driver circuit system structure schematic diagram, gives one example to be expressly understood the processing method that the invention described above provides below in conjunction with Fig. 4。As shown in Figure 5, by " LVDS receives (LVDSLatch) " module, the LVDS signal of input is received, the LVDS signal of reception will solve DE signal and R, G, B signal solves, wherein DE signal is broken down into Hsync and Vsync through " decomposing module (DEtoHVSync) ", scanning scanning line n corresponding in horizontal direction is calculated by " Hsync enumerator ", " GammaTable control signal generator " makes a look up out the control address (corresponding relation of each tables of data and horizontal scanning line n of correspondence according to horizontal scanning line n, carry out being stored in advance in chip) after measuring debugging according to different liquid crystal display screens before, GammaTable(and the brightness references tables of data of correspondence is found out) from GammaTable group (i.e. the first subregion synopsis), then through linear transformation (based on gamma curve, such as Gamma is 2.2), convert GammaTable(i.e. first tables of data of correspondence to), " GammaTable control signal generator " is according to horizontal scanning line n, adjust the analog reference voltage of P-Gamma, essentially consist in height ash exponent part, realize the delay of height GTG and the compensation of decline, data logger is by the R after overcompensation, G, B data exports DAC(digital to analog converter with Mini-LVDS data form) in, ultimately form the bucking voltage of each bar horizontal scanning line。
The display picture of 4K2K is such as divided into upper and lower 4 horizontal partitionings, and (this subregion can be wait the quantity of the horizontal scanning line included by subregion and each horizontal partitioning equal, 540 Line of each horizontal partitioning；Can also be do not wait in subregion and m horizontal partitioning along near one end of drive circuit extremely away from the direction of one end of drive circuit, the quantity of the horizontal scanning line included by each horizontal partitioning gradually decreases, that is in the position of close chip owing to driving force is strong, load capacitance-resistance is anti-less simultaneously, it is achieved data delay and decline are little, it is achieved that big subregion, in the position away from chip, load capacitance-resistance is anti-bigger, it is achieved data delay and decline are big, it is achieved little subregion)。
If 4 horizontal partitionings include the 1st horizontal partitioning and include 1 to 1080, the second horizontal partitioning includes 1081 to 1485, and the 3rd horizontal partitioning includes 1486 to 1890, and the 4th horizontal partitioning includes 1891 to 2160。If rolling counters forward horizontal scanning line n is 1688, in the 3rd horizontal partitioning, corresponding Table be 3 and 4(such as table 3), do the linear interpolation of correspondence according to table 4 and table 5, it is achieved D=(D2+D1) * (n-X1)/(X2-X1)；Wherein D calculates the nth bar Line RGBGamma value (i.e. the compensation of RGB) needing to compensate, D1, D2 is subregion GammaTable(and brightness references tables of data residing for corresponding n) middle corresponding compensation brightness reference value (value in table 4 and table 5), the such as R of the 3rd GTG, corresponding compensation brightness reference value respectively D1=12, D2=14；X1 and X2 is the initial sweep line numerical value in the 3rd horizontal partitioning, and corresponding numerical value is X1=1486, X2=1890；Realizing final 3rd corresponding for GTG R compensation value is D=(14+12) * (1688-1486)/(1890-1486)=13, it is to be appreciated that in the 3rd horizontal partitioning, each rgb value of each pixel being calculated just can according to table 4 and table 5 acquisition table 1。
The embodiment of the present invention adopts balanced subregion Gamma to drive, Hsync computer is used to find out the accurate location in corresponding vertical direction, the GammaTable of corresponding region is found out from the GammaTable table of subregion, again through adopting non-linear Gamma interpolation to carry out interpolation in 2 subregions, the GTG for picture carries out different partition compensation。
For being not easy to adopt GammaTable to compensate on a large scale at height ash exponent part, the present invention can adopt and carry out P-Gamm adjustment, it is achieved the delay of height GTG and the compensation of decline。Continuing above-mentioned example scanning line n is 1688, in the 3rd horizontal partitioning, corresponding Table be 3 and 4(such as table 3), do the linear interpolation of correspondence according to table 7 and table 8, it is achieved D=(D2+D1) * (n-X1)/(X2-X1)；Wherein D calculates the nth bar Line analog reference voltage value needing to compensate, D1, D2 is subregion GammaTable(and Voltage Reference tables of data residing for corresponding n) middle corresponding analog reference voltage value (value in table 7 and table 8), analog reference voltage value respectively D1=12.18, the D2=14 that such as 4 greyscale pixel are corresponding；X1 and X2 is the initial sweep line numerical value in the 3rd horizontal partitioning, and corresponding numerical value is X1=1486, X2=1890；The analog reference voltage value realizing final 4th GTG is D=(12.18+14) * (1688-1486)/(1890-1486)=13.09, it is to be appreciated that in the 3rd horizontal partitioning, the analog reference voltage value of each GTG of each pixel being calculated just can according to table 7 and table 8 acquisition table 2。
Fig. 6 is the T-V curve chart of the embodiment of the present invention, is formed the T-V curve table of corresponding n bar Line by linear interpolation。Fig. 7 is schematic diagram after embodiment of the present invention subregion driving processes, and one end of close drive circuit is with the driving voltage of the one end away from drive circuit relatively。Therefore, the time used by the driving voltage value set is arrived at the rising edge place driving signal near one end of drive circuit, the time used by the driving voltage value set is arrived relatively at the rising edge place driving signal with the one end away from drive circuit, thus avoiding upper and lower picture undercharge, it is achieved the purpose of the brightness uniformity that picture is upper and lower。Subregion provided by the invention drives processing method to be carried out different partition compensation and the lifting to analog reference voltage by subregion GammaTable, realize carrying out omnibearing Gamma compensation in vertical direction, realize the brightness of picture in vertical direction consistent, thus the signal delay up and down solving 4K2K display screen causes more greatly the picture brightness uniformity problem of upper and lower picture undercharge and the problem of the upper and lower crosstalk of picture under 3D。
Fig. 8 is that subregion driving of the present invention processes apparatus structure schematic diagram, as shown in Figure 8, this subregion driving processes device and includes arranging module 81, acquisition module 82 and display module 83, wherein, module 81 is set for display picture is vertically divided into m horizontal partitioning, m >=2, it is respectively provided with one first tables of data for each horizontal partitioning, described first tables of data includes the pixel of different GTG and is distinguished the compensation of corresponding RGB, and the compensation of the RGB corresponding to pixel having same gray level in the first tables of data corresponding to each horizontal partitioning vertically incrementally increases；Acquisition module 82, for first tables of data corresponding according to each horizontal partitioning, obtains the compensation of RGB corresponding to object pixel；Display module 83 obtains corresponding driving voltage for the compensation of the RGB corresponding according to described object pixel, and carries out picture and show。
A progressive ground, the low voltage difference LVDS signal that acquisition module 82 is corresponding specifically for receiving described object pixel, the first tables of data that object pixel according to described LVDS signal acquisition is corresponding, finds out the compensation of the RGB corresponding with the GTG of described object pixel in described first tables of data。
A progressive ground, arrange module 81 to be additionally operable to be respectively provided with one second tables of data for each horizontal partitioning, described second tables of data includes the pixel of different GTG and is distinguished corresponding analog reference voltage value, and the analog reference voltage value corresponding to pixel in the second tables of data corresponding to each horizontal partitioning vertically with same gray level incrementally increases；
Correspondingly, display module 83, specifically for the second tables of data corresponding to object pixel according to described LVDS signal acquisition, finds out the analog reference voltage value corresponding with the GTG of described object pixel in described second tables of data；And according to the compensation of RGB corresponding to described object pixel and described analog reference voltage value, obtain corresponding driving voltage, and carry out picture and show。
In said apparatus embodiment, in m horizontal partitioning, the quantity of horizontal scanning line included by each horizontal partitioning is equal；Or, in the one end along close drive circuit to away from the direction of one end of drive circuit in m horizontal partitioning, the quantity of the horizontal scanning line included by each horizontal partitioning gradually decreases。
This device can also include a memory module for storing described first tables of data and described second tables of data。Subregion driving provided by the invention processes device and may be used for implementing the handling process that above-mentioned each embodiment of the method provides, and concrete function and handling process repeat no more。
Subregion driving provided by the invention processes device, different partition compensation and the lifting to analog reference voltage is carried out by subregion GammaTable, realize carrying out omnibearing Gamma compensation in vertical direction, realize the brightness of picture in vertical direction consistent, thus the signal delay up and down solving 4K2K display screen causes more greatly the picture brightness uniformity problem of upper and lower picture undercharge and the problem of the upper and lower crosstalk of picture under 3D。
The present invention also provides for a kind of display, device is processed including display screen and subregion driving, this display screen processes device with subregion driving and is connected, wherein included subregion driving processes the subregion driving process device that device can adopt said apparatus embodiment to provide, and driving processing method to carry out partition compensation process for subregion display screen carried out as each embodiment of the method provides, concrete handling process repeats no more。
Last it is noted that various embodiments above is only in order to illustrate technical scheme, it is not intended to limit；Although the present invention being described in detail with reference to foregoing embodiments, it will be understood by those within the art that: the technical scheme described in foregoing embodiments still can be modified by it, or wherein some or all of technical characteristic is carried out equivalent replacement；And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme。
Claims (7)
1. a subregion drives processing method, it is characterised in that including:
Display picture is vertically divided into m horizontal partitioning, m >=2, it is respectively provided with one first tables of data for each horizontal partitioning, described first tables of data includes the pixel of different GTG and is distinguished the compensation of corresponding RGB, and the compensation of the RGB corresponding to pixel having same gray level in the first tables of data corresponding to each horizontal partitioning vertically incrementally increases；
Receive the low voltage difference LVDS signal that object pixel is corresponding, the first tables of data that object pixel according to described LVDS signal acquisition is corresponding, described first tables of data finds out the compensation of the RGB corresponding with the GTG of described object pixel；
It is respectively provided with one second tables of data for each horizontal partitioning, described second tables of data includes the pixel of different GTG and is distinguished corresponding analog reference voltage value, and the analog reference voltage value corresponding to pixel in the second tables of data corresponding to each horizontal partitioning vertically with same gray level incrementally increases；
The second tables of data that object pixel according to described LVDS signal acquisition is corresponding, finds out the analog reference voltage value corresponding with the GTG of described object pixel in described second tables of data；
Compensation according to RGB corresponding to described object pixel and described analog reference voltage value, obtain corresponding driving voltage, and carry out picture and show。
2. method according to claim 1, it is characterised in that the pixel of the different GTGs that described first tables of data includes the acquisition methods of compensation of RGB corresponding respectively include
Determine horizontal partitioning k, 1≤k that pixel is positioned at≤m, determine in the first subregion synopsis and described brightness references tables of data k corresponding for horizontal partitioning k and k+1；Described first subregion synopsis includes the mark of two brightness references tables of data corresponding to each horizontal partitioning, each brightness references tables of data all includes the pixel of different GTG and is distinguished the compensation brightness reference value of corresponding RGB, and the compensation of the compensation of the RGB in the brightness references tables of data k+1 RGB corresponding to pixel than in reference data table k with same gray level is big；
Described brightness references tables of data k and k+1 searches the compensation brightness reference value obtaining the RGB corresponding with the GTG of described pixel, compensation brightness reference value according to the RGB obtained, and the numerical value of the base level scanning line of described horizontal partitioning k, it is thus achieved that the compensation of the RGB that described pixel is corresponding。
3. method according to claim 1, it is characterised in that the pixel of the different GTGs that described second tables of data includes the acquisition methods of analog reference voltage value corresponding respectively include:
Determine horizontal partitioning k, 1≤k that pixel is positioned at≤m, determine in the second subregion synopsis and described Voltage Reference tables of data k corresponding for horizontal partitioning k and k+1；Described second subregion synopsis includes the mark of two Voltage Reference tables of data corresponding to each horizontal partitioning, each Voltage Reference tables of data all includes the pixel of different GTG and is distinguished the analog reference voltage value of corresponding RGB, and the analog reference voltage value in Voltage Reference tables of data k+1 have the analog reference voltage value corresponding to pixel of same gray level than in Voltage Reference tables of data k big；
Search at Voltage Reference tables of data k and k+1 and obtain the analog reference voltage value corresponding with the GTG of described pixel, according to the analog reference voltage value obtained, and the numerical value of the base level scanning line of described horizontal partitioning k, it is thus achieved that the analog reference voltage value that described pixel is corresponding。
4. the method according to claims 1 to 3 any claim, it is characterised in that in described m horizontal partitioning, the quantity of horizontal scanning line included by each horizontal partitioning is equal；Or,
In the one end along close drive circuit to away from the direction of one end of drive circuit in described m horizontal partitioning, the quantity of the horizontal scanning line included by each horizontal partitioning gradually decreases。
5. a subregion driving processes device, it is characterised in that including:
Module is set, for display picture is vertically divided into m horizontal partitioning, m >=2, it is respectively provided with one first tables of data for each horizontal partitioning, described first tables of data includes the pixel of different GTG and is distinguished the compensation of corresponding RGB, and the compensation of the RGB corresponding to pixel having same gray level in the first tables of data corresponding to each horizontal partitioning vertically incrementally increases；
Acquisition module, for first tables of data corresponding according to each horizontal partitioning, obtains the compensation of RGB corresponding to object pixel；
Display module, obtains corresponding driving voltage for the compensation according to RGB corresponding to described object pixel, and carries out picture and show；
Described acquisition module specifically for:
Receive the low voltage difference LVDS signal that described object pixel is corresponding, the first tables of data that object pixel according to described LVDS signal acquisition is corresponding, described first tables of data finds out the compensation of the RGB corresponding with the GTG of described object pixel；
The described module that arranges is additionally operable to:
It is respectively provided with one second tables of data for each horizontal partitioning, described second tables of data includes the pixel of different GTG and is distinguished corresponding analog reference voltage value, and the analog reference voltage value corresponding to pixel in the second tables of data corresponding to each horizontal partitioning vertically with same gray level incrementally increases；
Correspondingly, described display module specifically for:
The second tables of data that object pixel according to described LVDS signal acquisition is corresponding, finds out the analog reference voltage value corresponding with the GTG of described object pixel in described second tables of data；And according to the compensation of RGB corresponding to described object pixel and described analog reference voltage value, obtain corresponding driving voltage, and carry out picture and show。
6. device according to claim 5, it is characterised in that also include memory module, is used for storing described first tables of data and described second tables of data。
7. a display, it is characterised in that include display screen and be connected with described display screen, subregion driving as described in claim 5 or 6 process device。
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Address after: 266100 Zhuzhou Road, Laoshan District, Shandong, No. 151, No. Patentee after: Hisense Video Technology Co., Ltd Address before: 266100 Zhuzhou Road, Laoshan District, Shandong, No. 151, No. Patentee before: HISENSE ELECTRIC Co.,Ltd. |