CN103474016A - Partition driving processing method, processing device and displayer - Google Patents
Partition driving processing method, processing device and displayer Download PDFInfo
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Abstract
The invention provides a partition driving processing method, a processing device and a displayer. Different kinds of partition compensation and promotion of the simulation reference voltage are carried out through the partition Gamma Table, all-directional Gamma compensation in the perpendicular direction is achieved, the consistent luminance of a picture in the perpendicular direction is achieved, accordingly, the problem of up-and-down picture undercharging picture luminance uniformity caused by the fact that up-and-down signal delay of a 4K2K display screen is large is solved, and the problem of up-and-down crosstalk of the picture under a 3D mode is solved.
Description
Technical field
The present invention relates to screen display technology, relate in particular to a kind of subregion and drive disposal route, treating apparatus and display.
Background technology
In recent years, along with the develop rapidly of screen display technology, the appearance of revolutionary technology again and again, from cathode-ray tube (CRT) ((Cathode Ray Tube; Be called for short CRT) to liquid crystal display (Liquid Crystal Display; Being called for short LCD) technology, from the cold cathode fluorescent lamp pipe, (ColdCathodeFluorescentLamp is called for short: the CCFL) (LightEmittingDiode of the light emitting diode to energy-conservation slimming backlight; Be called for short: LED) product, from 2D to the 3D technical products, new display technique updates and all to manufacturer, has brought very big economy and market efficiency each time.This makes increasing enterprise take the lead in starting technology and the product of thinking and preparation " rear plate TV epoch ", and be the next generation can play again revolutionary technology in the demonstration field what? the superelevation image technology end product of 4K * 2K and bore hole 3D technical products will become two large new highlights of flat panel display development.
The large size electro screen, because the visual field of its super large makes the beholder have the sense of reality on the spot in person and telepresenc, but on the display screen of this super large current full HD (FullHighDefinition; Be called for short: the FHD) demonstration of resolution, the picture that seems is more coarse, and people, to the meticulous sense of picture and the more and more higher requirement of sharpness, make 4K * 2K super-resolution degree technology arise at the historic moment simultaneously.3D display technique of future generation is that many viewpoint technique that bore hole 3D shows can make the resolution of watching reduce simultaneously, its demand to 4K * 2K super-resolution degree technology is also extremely urgent, a large amount of universal also being based upon on 4K * 2K super-resolution degree technology of bore hole 3D technology of future generation.
4K * 2K, four times of resolution rates of existing 1080p have been reached exactly, reach the resolution of 3840x2160, from pixel quantity, calculate, 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.Both have reached the former 4 times substantially afterwards, so, only from the meaning of picture pixel, possess the display device of " 4K * 2K " resolution than the content of similar 4 times of the many demonstrations of the equipment of traditional 1080p.
The schematic diagram that Fig. 1 is the vertical four subregion frameworks of prior art, the general framework that adopts vertical four subregions of existing display screen, as shown in Figure 1, along continuous straight runs is divided into the Si Ge district by display screen, and I is responsible in district 1 to 960 line of level, and vertical direction is 0 to 2160; II is responsible in district 961 to 1080 lines of level, and vertical direction is 0 to 2160; III is responsible in district 1081 to 2880 lines of level, and vertical direction is 0 to 2160; IV is responsible in district 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, make the drive wire number on circuit increase, equiva lent impedance and the capacitive reactance of each section are larger, make at the driving signal difference of starting end (near an end of driving circuit) and terminal (away from an end of driving circuit) very big, make picture larger in upper and lower two ends signal delay, the driving signal of starting end is owing to there is no distortion particularly, therefore will arrive immediately the driving voltage value of setting at the rising edge place that drives signal, and there is distortion in terminal because the impact that is subject to equiva lent impedance and capacitive reactance drives signal, therefore can't arrive immediately the driving voltage value of setting at the rising edge place that drives signal, but delaying by a period of time, therefore upper and lower picture undercharge appears, thereby make picture upper and lower brightness irregularities occur, particularly at the 3D state, make upper and lower picture occur crosstalking very large.
Therefore, the undercharge of picture up and down how solved because of for example 4K2K display screen causes the defect of brightness disproportionation to become industry important topic urgently to be resolved hurrily.
Summary of the invention
The present invention is directed to the defect of prior art, provide a kind of subregion to drive disposal route, treating apparatus and display.
Subregion provided by the invention drives disposal route, comprising:
Display frame vertically is divided into to m horizontal partitioning, m >=2, for each horizontal partitioning arranges respectively one first tables of data, described the first tables of data comprises that the pixel of different GTGs distinguishes the compensation of corresponding RGB, and the compensation that has the corresponding RGB of pixel of same gray level in corresponding the first tables of data of each horizontal partitioning vertically progressively increases;
Corresponding the first tables of data according to each horizontal partitioning, obtain the compensation of the RGB that object pixel is corresponding;
According to described object pixel, the compensation of corresponding RGB is obtained corresponding driving voltage, and carries out picture disply
Subregion provided by the invention drives treating apparatus, comprising:
Module is set, for display frame vertically is divided into to m horizontal partitioning, m >=2, for each horizontal partitioning arranges respectively one first tables of data, described the first tables of data comprises that the pixel of different GTGs distinguishes the compensation of corresponding RGB, and the compensation that has the corresponding RGB of pixel of same gray level in corresponding the first tables of data of each horizontal partitioning vertically progressively increases;
Acquisition module, for first tables of data corresponding according to each horizontal partitioning, obtain the compensation of the RGB that object pixel is corresponding;
Display module, obtain corresponding driving voltage for the compensation of the RGB corresponding according to described object pixel, and carry out picture disply.
Display provided by the invention comprises that display screen and subregion that be connected with display screen, above-mentioned drive treating apparatus.
Subregion provided by the invention drives disposal route, treating apparatus and display, by picture being divided into to a plurality of horizontal partitionings and each horizontal partitioning being carried out to the subregion compensation, realize carrying out in vertical direction omnibearing Gamma compensation, realize that on vertical direction, the brightness of picture is consistent, thereby the signal delay up and down that solves the 4K2K display screen causes more greatly the picture brightness uniformity problem of upper and lower picture undercharge and the problem that under 3D, picture is crosstalked up and down.
The accompanying drawing explanation
The schematic diagram that Fig. 1 is the vertical four subregion frameworks of prior art;
Fig. 2 is that subregion of the present invention drives disposal route one embodiment process flow diagram
Fig. 3 is that subregion of the present invention drives another embodiment process flow diagram of disposal route;
Fig. 4 is embodiment of the present invention display frame subregion schematic diagram;
Fig. 5 is drive circuit system structural representation of the present invention;
The T-V curve map that Fig. 6 is the embodiment of the present invention;
Fig. 7 is that embodiment of the present invention subregion drives the rear schematic diagram of processing;
Fig. 8 is that subregion of the present invention drives the treating apparatus structural representation.
Embodiment
Various embodiments of the present invention are for cause the defect of brightness disproportionation in large display screen in prior art because of upper and lower picture undercharge, provide a solution by mark off a plurality of horizontal partitionings in the display frame of 4K2K, and the disposal route that adopts balanced subregion Gamma to drive is carried out corresponding compensation deals to the driving voltage of each pixel in each horizontal partitioning, and carry out picture disply according to the driving voltage after compensation, cause more greatly the picture brightness uniformity problem of upper and lower picture undercharge with the signal delay up and down that solves the 4K2K display screen, and the problem that under 3D, picture is crosstalked up and down.Should be noted that solution provided by the invention not only is applicable to the large scale display screens (including but not limited to LCD TV and flat-panel monitor) such as 4K2K or 8K2K, and equally also be applicable to the display screen of other sizes, the display frame of 4K2K of below only take describes as example, but is not limited to this.
Fig. 2 is that subregion of the present invention drives disposal route one embodiment process flow diagram, and as shown in Figure 2, the method comprises:
Described the first tables of data comprises that the pixel of different GTGs distinguishes the compensation of corresponding RGB, and the compensation that has the corresponding RGB of pixel of same gray level in corresponding the first tables of data of each horizontal partitioning vertically progressively increases;
The pixel of the different GTGs that wherein, the first tables of data comprises respectively the acquisition methods of the compensation of corresponding RGB comprise:
Determine the horizontal partitioning k that pixel is positioned at, 1≤k≤m determines brightness reference data table k and the k+1 corresponding with described horizontal partitioning k in the first subregion table of comparisons; The described first subregion table of comparisons comprises the sign of corresponding two the brightness reference data tables of each horizontal partitioning, the pixel that each brightness reference data table includes different GTGs is distinguished the compensate for brightness reference value of corresponding RGB, and the compensation of the RGB in brightness reference data table k+1 is larger than the compensation of the corresponding RGB of pixel that has same gray level in reference data table k;
Search the compensate for brightness reference value that obtains the RGB corresponding with the GTG of described pixel in described brightness reference data table k and k+1, compensate for brightness reference value according to the RGB obtained, and the numerical value of the base level sweep trace of described horizontal partitioning k, obtain the compensation of the RGB that described pixel is corresponding.
Can comprise particularly, receive the low voltage difference LVDS signal that described object pixel is corresponding, according to the first tables of data corresponding to the described object pixel of described LVDS signal acquisition, find out the compensation of the RGB corresponding with the GTG of described object pixel in described the first tables of data
Further, the present embodiment method can also comprise, for each horizontal partitioning arranges respectively one second tables of data, described the second tables of data comprises that the pixel of different GTGs distinguishes corresponding analog reference voltage value, and the corresponding analog reference voltage value of pixel that has same gray level in corresponding the second tables of data of each horizontal partitioning vertically progressively increases.So correspondingly, step 202 item can specifically comprise:
According to the second tables of data corresponding to the described object pixel of described LVDS signal acquisition, find out the analog reference voltage value corresponding with the GTG of described object pixel in described the second tables of data;
According to described object pixel, the compensation of corresponding RGB and described analog reference voltage value, obtain corresponding driving voltage, and carry out picture disply.
The pixel of the different GTGs that wherein, the second tables of data comprises respectively the acquisition methods of corresponding analog reference voltage value comprise:
Determine the horizontal partitioning k that pixel is positioned at, 1≤k≤m determines Voltage Reference tables of data k and the k+1 corresponding with described horizontal partitioning k in the second subregion table of comparisons; The described second subregion table of comparisons comprises the sign of corresponding two the Voltage Reference tables of data of each horizontal partitioning, the pixel that each Voltage Reference tables of data includes different GTGs is distinguished the analog reference voltage value of corresponding RGB, and the analog reference voltage value in Voltage Reference tables of data k+1 is larger than the corresponding analog reference voltage value of pixel that has same gray level in Voltage Reference tables of data k;
Search the acquisition analog reference voltage value corresponding with the GTG of described pixel at Voltage Reference tables of data k and k+1, according to the analog reference voltage value obtained, and and the numerical value of the base level sweep trace of described horizontal partitioning k, obtain the analog reference voltage value that described pixel is corresponding.
Fig. 3 is that subregion of the present invention drives another embodiment process flow diagram of disposal route, and as shown in Figure 3, the method comprises:
Fig. 4 is embodiment of the present invention display frame subregion schematic diagram, as shown in Figure 4, in the embodiment of the present invention, the display frame of 4K2K vertically is divided into to m horizontal partitioning, m >=2.The described vertical direction of the embodiment of the present invention refers in display frame that close driving circuit one end is to the end away from driving circuit.In the embodiment of the present invention, each horizontal partitioning is also respectively to first tables of data should be arranged, and this first tables of data comprises that the pixel of different GTGs distinguishes the compensation of corresponding RGB.The compensation of this RGB should meet following requirement: after each pixel in display frame obtains corresponding driving voltage according to the compensation of this RGB, the display brightness of each horizontal partitioning is identical.The compensation that has specifically the corresponding RGB of pixel of same gray level in corresponding the first tables of data of each horizontal partitioning vertically progressively increases.Be appreciated that m horizontal partitioning corresponding first tables of data separately respectively, need to store m the first tables of data.
Be understandable that, the compensation of the RGB that certain GTG that described the first tables of data comprises is corresponding, for thering is the corresponding compensation of pixel of same gray level on each horizontal scanning line in corresponding horizontal partitioning, in this horizontal partitioning, there is the compensation of the RGB that the pixel of same gray level is corresponding identical on two different horizontal scanning lines.
Should be noted that the compensation that has the corresponding RGB of pixel of same gray level in corresponding the first tables of data of each horizontal partitioning from top to bottom progressively increases in order to realize the uniform purpose of the upper and lower brightness of display frame.For example, Table A is the first tables of data corresponding to horizontal partitioning be positioned near driving circuit one end, table B for Table A, close on and away from the horizontal partitioning of driving circuit one end corresponding the first tables of data, the compensation of the RGB that a certain GTG in table B is corresponding wants large with respect to the compensation of the RGB that in Table A, same GTG is corresponding.Certainly, be not the compensation of the RGB that in table B, each GTG is corresponding all for example, than large (compensation of the RGB that 0 GTG is corresponding is 0) in Table A, just there is progressively the variation tendency increased.
After receiving a low voltage difference LVDS signal, the pixel to be shown that this LVDS signal is comprised is that the valid data gating DE signal of object pixel and the original brightness value of RGB solve, then the horizontal scanning line n(n that the DE signal that basis solves can be determined this object pixel place is natural number), be that driving circuit can determine currently which bar horizontal line is being scanned that (this is for prior art according to the DE signal, the present invention repeats no more), be understandable that object pixel is a pixel on this horizontal scanning line n.What that is to say that the LVDS signal that receives carries is the original brightness value of the RGB of the activation bit of (or a plurality of) pixel on the horizontal scanning line of n bar and this pixel.
After according to the DE signal, determining that object pixel is positioned at the horizontal scanning line of n bar, just can determine this object pixel according to n and specifically be positioned at which horizontal partitioning.After determining the horizontal partitioning be positioned at, continue to obtain first tables of data corresponding with this horizontal partitioning, and search the compensation with the corresponding RGB of GTG of object pixel in the first tables of data obtained, then replace the original brightness value of RGB to export to digital to analog converter DAC with the compensation of this RGB.The process of the compensation that obtains RGB by tabling look-up in the embodiment of the present invention is the process of the original brightness value of RGB being adjusted to compensation.
Table 1
Above table 1 is the embodiment of first tables of data, as shown in table 1, in the first tables of data, comprises from 0 to 255 GTG and distinguishes the numerical value of corresponding R, G, B.For example, if the GTG 3 of a pixel, the compensation of the corresponding RGB of this pixel is respectively " 13,12,11 ".The original brightness value of the RGB of this pixel that the GTG of pixel can comprise according to the LVDS signal is determined.Particularly, the original brightness value of the RGB of the object pixel that driving circuit comprises according to the LVDS signal received is determined the GTG of this object pixel, the compensation that corresponding the first tables of data of the horizontal partitioning be arranged at this object pixel according to definite GTG is searched the corresponding RGB of this GTG, and then replace the original brightness value to export to DAC with this compensation, for described DAC computing driving voltage.
The compensation of step 302, described DAC corresponding RGB according to described object pixel, obtain corresponding driving voltage, and carry out picture disply.
After the compensation of the RGB of DAC receiving target pixel, obtain corresponding driving voltage, and show the picture of this object pixel in display screen.
Subregion provided by the invention drives disposal route, by display frame vertically is divided into to a plurality of horizontal partitionings, and obtain first tables of data corresponding with each horizontal partitioning, realize the Gamma compensation of corresponding horizontal partitioning by the compensation of searching the RGB in this first tables of data, thereby solve that the signal delay up and down of 4K2K liquid crystal panel for example causes more greatly upper and lower picture undercharge and the problem of the picture brightness inequality that causes, with the problem that picture under 3D is crosstalked up and down, realize the brightness uniformity of picture on vertical direction.
Consider at the grey exponent part of height and be not easy to adopt on a large scale Gamma Table compensation, on the basis of said method embodiment of the present invention, can also carry out the P-Gamm adjustment, realize the delay of height GTG and the compensation of decline.Particularly, each horizontal partitioning is also respectively to one second tables of data should be arranged, and this second tables of data comprises that the pixel of different GTGs distinguishes corresponding analog reference voltage value; This analog reference voltage value should meet following requirement: after each pixel in display frame obtains corresponding driving voltage according to the compensation of RGB and this analog reference voltage value, the display brightness that can meet each horizontal partitioning is identical.Concrete is and corresponding the second tables of data of each horizontal partitioning vertically in there is same gray level the corresponding analog reference voltage value of pixel progressively increase.
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 find out the analog reference voltage value corresponding with the GTG of object pixel and export to DAC in the second tables of data; The compensation of the RGB that described DAC is corresponding according to object pixel and the analog reference voltage value of tabling look-up and obtaining, obtain corresponding driving voltage, and carry out picture disply.
Table 2
| GTG | TV- |
| 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, in the second tables of data, comprises that the part GTG distinguishes corresponding analog reference voltage value.Be understandable that, can comprise the corresponding analog reference voltage value of 0 to 255 each GTG in the table 2 of the embodiment of the present invention, now can directly according to tabling look-up, obtain the analog reference voltage value corresponding with the GTG of object pixel.Can certainly only comprise the analog reference voltage value (table 2 is) that the part GTG is corresponding, if now the GTG of object pixel has storage in table 2, can obtain corresponding analog reference voltage value by table look-at; If the GTG of object pixel is not storage in table 2, analog reference voltage value that can be corresponding by two adjacent GTGs obtains by predetermined algorithm, if for example the GTG of object pixel is 3, and do not store GTG in table 2, be 3 corresponding analog reference voltage values, analog reference voltage value 15.59V and the 13.09V of correspondence calculate the analog reference voltage value that obtains GTG 3 correspondences respectively to obtain GTG 0 and 4.
Be understandable that, in described the second tables of data, the pixel of different GTGs is distinguished corresponding analog reference voltage value, for the corresponding analog reference voltage value of the pixel that there is same gray level on each horizontal scanning line in corresponding horizontal partitioning, in this horizontal partitioning, there is the analog reference voltage value corresponding to pixel of same gray level on two different horizontal scanning lines.
Should be noted that the corresponding analog reference voltage value of pixel that has same gray level in corresponding the second tables of data of each horizontal partitioning from top to bottom progressively increases in order to realize the uniform purpose of the upper and lower brightness of display frame.For example, table C is the second tables of data corresponding to horizontal partitioning be positioned near driving circuit one end, table D for table C, close on and away from the horizontal partitioning of driving circuit one end corresponding the second tables of data, the analog reference voltage value that a certain GTG in table D is corresponding wants large with respect to the analog reference voltage value that in table C, same GTG is corresponding.Certainly, be not analog reference voltage value that in table D, each GTG is corresponding all for example, than large (the analog reference voltage value that 128 GTGs are corresponding is 5V) in table C, just at the grey exponent part of height, there is the progressively variation tendency of increase.
In said method embodiment, the pixel of the different GTGs that the first tables of data comprises respectively the compensation of corresponding RGB can obtain in the following way:
Determine horizontal partitioning k(1≤k that object pixel is positioned at≤m according to n), determine brightness reference data table k and the k+1 corresponding with this horizontal partitioning k in the first subregion table of comparisons; This first subregion table of comparisons comprises the sign of corresponding two the brightness reference data tables of each horizontal partitioning, and the pixel that each brightness reference data table includes different GTGs is distinguished the compensate for brightness reference value of corresponding RGB;
Searching the compensate for brightness reference value that obtains the RGB corresponding with the GTG of object pixel in brightness reference data table k and k+1, and according to formula D=(D1+D2) * (n-X1)/(X2-X1) calculates the compensation of the RGB that object pixel is corresponding; Wherein, the compensation that D is the RGB that object pixel is corresponding, the compensate for brightness reference value that D1 is RGB corresponding with the GTG of object pixel in brightness reference data table k, the compensate for brightness reference value that D2 is RGB corresponding with the GTG of object pixel in brightness reference data table k+1, X1 and X2 are respectively the numerical value of base level sweep trace in horizontal partitioning k.
Table 3
Above table 3 is the embodiment of first a subregion table of comparisons, as shown in table 3, the sign that can search corresponding two the brightness reference data tables of each horizontal partitioning according to this table 3.For example, the sign of corresponding two the brightness reference data tables of horizontal partitioning 3 is respectively 3 and 4, and the pixel that brightness reference data table 3 and brightness reference data table 4 include different GTGs is distinguished the compensate for brightness reference value of corresponding RGB.That is to say after determining the horizontal partitioning that object pixel is positioned at, according to this horizontal partitioning, search the first subregion table of comparisons, obtain brightness reference data table 3 and brightness reference data table 4; Then carry out to obtain by calculating the compensation of the RGB that this object pixel is corresponding according to compensate for brightness reference value corresponding with the GTG of object pixel in brightness reference data table 3 and brightness reference data table 4.
The present invention can be by the brightness value of m horizontal partitioning in 4K2K display frame under the different GTGs of test, brightness by each horizontal partitioning equates to find out corresponding GTG, realize the luminance proportion of the corresponding horizontal partitioning of picture, show that the Gamma Table table of corresponding horizontal partitioning is the brightness reference data table.
Table 4
Table 5
Above table 4 and table 5 are above-mentioned brightness reference data table 3 and the embodiment of brightness reference data table 4, as shown in table 4,5, wherein storage is the compensate for brightness reference value that the pixel of different GTGs is distinguished corresponding RGB, for example the compensate for brightness reference value 12 of R corresponding to the pixel of GTG 3 in brightness reference data table 3.
It should be noted that brightness reference data table 3 is for the brightness reference table to should the horizontal partitioning coboundary, brightness reference data table 4 is to brightness reference table that should the horizontal partitioning lower boundary.Be understandable that, brightness reference data table 3 is simultaneously also for closing on this horizontal partitioning and, away from the brightness reference table of the corresponding coboundary of horizontal partitioning of driving circuit one end, the rest may be inferred.Be understandable that, in order to realize the uniform purpose of upper and lower brightness, the compensation of RGB in the brightness reference table of the lower boundary that arbitrary horizontal partitioning is corresponding is larger than the compensation of the corresponding RGB of pixel that has same gray level in the brightness reference table of corresponding coboundary, can know from table 4 and table 5.
Known according to table 4 and table 5, high gray part for example GTG 255 tables 4 compensation reached the highest 1023, now table 5 can't his-and-hers watches 4 in the RG of GTG 255 partly compensate, can carry out supplementing of analog reference voltage value according to the second tables of data in such cases, even to realize the upper and lower brightness of picture.
In said method embodiment, the pixel of the different GTGs that the second tables of data comprises respectively corresponding analog reference voltage value can obtain in the following way:
Determine according to n the horizontal partitioning k that object pixel is positioned at, 1≤k≤m determines Voltage Reference tables of data k and the k+1 corresponding with horizontal partitioning k in the second subregion table of comparisons; The second subregion table of comparisons comprises the sign of corresponding two the Voltage Reference tables of data of each horizontal partitioning, and the pixel that each Voltage Reference tables of data includes different GTGs is distinguished the analog reference voltage value of corresponding RGB;
Searching in Voltage Reference tables of data k and k+1 and obtain the analog reference voltage value corresponding with the GTG of object pixel, and according to formula D=(D1+D2) * (n-X1)/(X2-X1) calculates 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, and X1 and X2 are respectively the numerical value of base level sweep trace in described horizontal partitioning k.
Table 6
Above table 6 is the embodiment of second a subregion table of comparisons, as shown in table 6, can search the sign of corresponding two the Voltage Reference tables of data of each horizontal partitioning according to this table 6.For example, the sign of corresponding two the Voltage Reference tables of data of horizontal partitioning 3 is respectively 3 and 4, and the pixel that Voltage Reference tables of data 3 and Voltage Reference tables of data 4 include different GTGs is distinguished the analog reference voltage value of corresponding RGB.That is to say after determining the horizontal partitioning that object pixel is positioned at, according to this horizontal partitioning, search the second subregion table of comparisons, obtain Voltage Reference tables of data 3 and Voltage Reference tables of data 4; Then according to analog reference voltage value corresponding with the GTG of object pixel in Voltage Reference tables of data 3 and Voltage Reference tables of data 4, come to obtain by calculating the analog reference voltage value that this object pixel is corresponding.
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 above-mentioned brightness reference data table 3 and the embodiment of brightness reference data table 4, as shown in table 7,8, wherein storage is that the pixel of different GTGs is distinguished corresponding analog reference voltage value, and for example in brightness reference data table 7, analog reference voltage value corresponding to the pixel of GTG 4 is 12.18V.
It should be noted that Voltage Reference tables of data 3 is for the Voltage Reference tables of data to should the horizontal partitioning coboundary, Voltage Reference tables of data 4 is to Voltage Reference tables of data that should the horizontal partitioning lower boundary.Be understandable 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 corresponding coboundary of horizontal partitioning of driving circuit one end, the rest may be inferred.Be understandable that, in order to realize the uniform purpose of upper and lower brightness, analog reference voltage value in the Voltage Reference tables of data of the lower boundary that arbitrary horizontal partitioning is corresponding is larger than the corresponding analog reference voltage value of pixel that has same gray level in the Voltage Reference tables of data of corresponding coboundary, according to table 7 and analog reference voltage value corresponding to the known grey exponent part of telling good from bad of table 8, has the trend progressively increased.
Certainly, the pixel of the different GTGs that the first tables of data comprises is distinguished the compensation of corresponding RGB, and the pixel of the second different GTGs of comprising of tables of data respectively corresponding analog reference voltage value be not limited to above-mentioned acquisition methods, can also directly be stored in the first tables of data and the second tables of data according to test data in the past, need not carry out above-mentioned obtaining by interpolation method.
Fig. 5 is drive circuit system structural representation of the present invention, gives one example the disposal route that is expressly understood that the invention described above provides below in conjunction with Fig. 4.As shown in Figure 5, LVDS signal by " LVDS receives (LVDS Latch) " module to input is received, to in the LVDS signal of reception, solve DE signal and R, G, the B signal solves, wherein the DE signal is broken down into Hsync and Vsync through " decomposing module (DE to H V Sync) ", calculate scanning sweep trace n corresponding on horizontal direction by " Hsync counter ", " Gamma Table control signal generator " found out the corresponding control address (corresponding relation of each tables of data and horizontal scanning line n according to horizontal scanning line n, after measuring debugging according to different liquid crystal displays before, carry out pre-stored in chip), finding out corresponding Gamma Table(from Gamma Table group (i.e. the first subregion table of comparisons) is the brightness reference data table), pass through again linear transformation (based on the Gamma curve, for example Gamma is 2.2), convert i.e. the first tables of data of corresponding Gamma Table(to), " Gamma Table control signal generator " is according to horizontal scanning line n, adjust the analog reference voltage of P-Gamma, mainly be the grey exponent part of height, realize the delay of height GTG and the compensation of decline, data logger is by the R after over-compensation, G, the B data output to the DAC(digital to analog converter with the Mini-LVDS data layout) in, the final bucking voltage that forms each horizontal scanning line.
(this subregion can be that to wait subregion be that the quantity of the included horizontal scanning line of each horizontal partitioning equates, 540 Line of each horizontal partitioning to be divided into upper and lower 4 horizontal partitionings such as the display frame by 4K2K; Can be also do not wait subregion be in m horizontal partitioning along near an end of driving circuit to the direction of the end away from driving circuit, the quantity of the horizontal scanning line that each horizontal partitioning is included reduces gradually, that is to say in the position near chip because driving force is strong, the capacitance-resistance of load simultaneously is anti-less, realizes that data delay and decline are little, so realize bigdos, in the position away from chip, the load capacitance-resistance is anti-larger, realizes that data delay and decline are large, realizes little subregion).
If 4 horizontal partitionings comprise that the 1st horizontal partitioning comprises that 1 to 1080, the second horizontal partitioning comprises that 1081 to 1485, the three horizontal partitionings comprise that 1486 to 1890, the four horizontal partitionings comprise 1891 to 2160.As rolling counters forward horizontal scanning line n is 1688, in the 3rd horizontal partitioning, corresponding Table be 3 and 4(as table 3), do corresponding linear interpolation according to table 4 and table 5, realize D=(D2+D1) * (n-X1)/(X2-X1); The RGB Gamma value (being the compensation of RGB) that wherein D need to compensate for calculating n bar Line, D1, D2 is that corresponding n subregion Gamma of living in Table(is the brightness reference data table) middle corresponding compensate for brightness reference value (as the value in table 4 and table 5), R such as the 3rd GTG, corresponding compensate for brightness reference value is respectively D1=12, D2=14; X1 and X2 are the initial sweep trace numerical value in the 3rd horizontal partitioning, and corresponding numerical value is X1=1486, X2=1890; Realize that compensation value corresponding to final the 3rd GTG R is D=(14+12) * (1688-1486)/(1890-1486)=13, being understandable that in the 3rd horizontal partitioning that each rgb value to each pixel is calculated just can be according to table 4 and table 5 acquisition table 1.
The embodiment of the present invention adopts balanced subregion Gamma to drive, use the Hsync counter to find out the accurate location on corresponding vertical direction, find out the Gamma Table of corresponding region from the Gamma Table table of subregion, again by adopting non-linear Gamma interpolation method to carry out interpolation, for the GTG of picture, carry out different subregion compensation in 2 subregions.
For at the grey exponent part of height, being not easy to adopt on a large scale Gamma Table compensation, the present invention can adopt and carry out the P-Gamm adjustment, realizes the delay of height GTG and the compensation of decline.Continuing above-mentioned example sweep trace n is 1688, in the 3rd horizontal partitioning, corresponding Table be 3 and 4(as table 3), do corresponding linear interpolation according to table 7 and table 8, realize D=(D2+D1) * (n-X1)/(X2-X1); The analog reference voltage value that wherein D need to compensate for calculating n bar Line, D1, D2 is that corresponding n subregion Gamma of living in Table(is the Voltage Reference tables of data) middle corresponding analog reference voltage value (as the value in table 7 and table 8), the analog reference voltage value corresponding such as 4 GTG pixels is respectively D1=12.18, D2=14; X1 and X2 are the initial sweep trace numerical value in the 3rd horizontal partitioning, and corresponding numerical value is X1=1486, X2=1890; The analog reference voltage value that realizes final the 4th GTG is D=(12.18+14) * (1688-1486)/(1890-1486)=13.09, be understandable that the interior analog reference voltage value of each each GTG of pixel is calculated of the 3rd horizontal partitioning just can be according to table 7 and table 8 acquisition table 2.
The T-V curve map that Fig. 6 is the embodiment of the present invention, form 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 drive to be processed, more approaching with the driving voltage of an end away from driving circuit near an end of driving circuit.Therefore, an end near driving circuit arrives the driving voltage value time used of setting at the rising edge place that drives signal, more approaching with the driving voltage value time used that the end away from driving circuit is set in the rising edge place arrival that drives signal, thereby avoid upper and lower picture undercharge, realize the uniform purpose of the upper and lower brightness of picture.Subregion provided by the invention drives disposal route to carry out different subregion compensation by subregion Gamma Table and to the lifting of analog reference voltage, realize carrying out in vertical direction omnibearing Gamma compensation, realize that on vertical direction, the brightness of picture is consistent, thereby the signal delay up and down that solves the 4K2K display screen causes more greatly the picture brightness uniformity problem of upper and lower picture undercharge and the problem that under 3D, picture is crosstalked up and down.
Fig. 8 is that subregion of the present invention drives the treating apparatus structural representation, as shown in Figure 8, this subregion drives treating apparatus to comprise module 81 is set, acquisition module 82 and display module 83, wherein, module 81 is set for display frame vertically being divided into to m horizontal partitioning, m >=2, for each horizontal partitioning arranges respectively one first tables of data, described the first tables of data comprises that the pixel of different GTGs distinguishes the compensation of corresponding RGB, and the compensation that has the corresponding RGB of pixel of same gray level in corresponding the first tables of data of each horizontal partitioning vertically progressively increases, acquisition module 82, for first tables of data corresponding according to each horizontal partitioning, obtains the compensation of the RGB that object pixel is corresponding, display module 83 obtains corresponding driving voltage for the compensation of the RGB corresponding according to described object pixel, and carries out picture disply.
A progressive ground, acquisition module 82 is specifically for receiving the low voltage difference LVDS signal that described object pixel is corresponding, according to the first tables of data corresponding to the described object pixel of described LVDS signal acquisition, find out the compensation of the RGB corresponding with the GTG of described object pixel in described the first tables of data.
A progressive ground, module 81 is set also is used to each horizontal partitioning that one second tables of data is set respectively, described the second tables of data comprises that the pixel of different GTGs distinguishes corresponding analog reference voltage value, and the corresponding analog reference voltage value of pixel that has same gray level in corresponding the second tables of data of each horizontal partitioning vertically progressively increases;
Correspondingly, display module 83, specifically for according to the second tables of data corresponding to the described object pixel of described LVDS signal acquisition, finds out the analog reference voltage value corresponding with the GTG of described object pixel in described the second tables of data; And according to described object pixel compensation and the described analog reference voltage value of corresponding RGB, obtain corresponding driving voltage, and carry out picture disply.
In said apparatus embodiment, in m horizontal partitioning, the quantity of the included horizontal scanning line of each horizontal partitioning equates; Perhaps, in m horizontal partitioning at the end along near driving circuit to the direction of the end away from driving circuit, the quantity of the horizontal scanning line that each horizontal partitioning is included reduces gradually.
This device can also comprise that a memory module is for storing described the first tables of data and described the second tables of data.The treatment scheme that subregion provided by the invention drives treating apparatus to provide for implementing above-mentioned each embodiment of the method, concrete function and treatment scheme repeat no more.
Subregion provided by the invention drives treating apparatus, carry out the compensation of different subregion and to the lifting of analog reference voltage by subregion Gamma Table, realize carrying out in vertical direction omnibearing Gamma compensation, realize that on vertical direction, the brightness of picture is consistent, thereby the signal delay up and down that solves the 4K2K display screen causes more greatly the picture brightness uniformity problem of upper and lower picture undercharge and the problem that under 3D, picture is crosstalked up and down.
The present invention also provides a kind of display, comprise that display screen and subregion drive treating apparatus, this display screen drives treating apparatus to be connected with subregion, wherein included subregion drives the subregion that treating apparatus can adopt said apparatus embodiment to provide to drive treating apparatus, and driving disposal route to carry out the subregion compensation deals for the subregion that display screen is carried out providing as each embodiment of the method, concrete treatment scheme repeats no more.
Finally it should be noted that: above each embodiment, only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to aforementioned each embodiment, the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: its technical scheme that still can put down in writing aforementioned each embodiment is modified, or some or all of technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the scope of various embodiments of the present invention technical scheme.
Claims (11)
1. a subregion drives disposal route, it is characterized in that, comprising:
Display frame vertically is divided into to m horizontal partitioning, m >=2, for each horizontal partitioning arranges respectively one first tables of data, described the first tables of data comprises that the pixel of different GTGs distinguishes the compensation of corresponding RGB, and the compensation that has the corresponding RGB of pixel of same gray level in corresponding the first tables of data of each horizontal partitioning vertically progressively increases;
Corresponding the first tables of data according to each horizontal partitioning, obtain the compensation of the RGB that object pixel is corresponding;
According to described object pixel, the compensation of corresponding RGB is obtained corresponding driving voltage, and carries out picture disply.
2. method according to claim 1, is characterized in that, described first tables of data corresponding according to each horizontal partitioning obtained the compensation of the RGB that object pixel is corresponding, comprising:
Receive the low voltage difference LVDS signal that described object pixel is corresponding, according to the first tables of data corresponding to the described object pixel of described LVDS signal acquisition, find out the compensation of the RGB corresponding with the GTG of described object pixel in described the first tables of data.
3. method according to claim 2, is characterized in that, described method also comprises:
For each horizontal partitioning arranges respectively one second tables of data, described the second tables of data comprises that the pixel of different GTGs distinguishes corresponding analog reference voltage value, and the corresponding analog reference voltage value of pixel that has same gray level in corresponding the second tables of data of each horizontal partitioning vertically progressively increases;
Correspondingly, according to described object pixel, the compensation of corresponding RGB is obtained corresponding driving voltage, and carries out picture disply, comprising:
According to the second tables of data corresponding to the described object pixel of described LVDS signal acquisition, find out the analog reference voltage value corresponding with the GTG of described object pixel in described the second tables of data;
According to described object pixel, the compensation of corresponding RGB and described analog reference voltage value, obtain corresponding driving voltage, and carry out picture disply.
4. method according to claim 1, is characterized in that, the pixel of the different GTGs that described the first tables of data comprises respectively the acquisition methods of the compensation of corresponding RGB comprise
Determine the horizontal partitioning k that pixel is positioned at, 1≤k≤m determines brightness reference data table k and the k+1 corresponding with described horizontal partitioning k in the first subregion table of comparisons; The described first subregion table of comparisons comprises the sign of corresponding two the brightness reference data tables of each horizontal partitioning, the pixel that each brightness reference data table includes different GTGs is distinguished the compensate for brightness reference value of corresponding RGB, and the compensation of the RGB in brightness reference data table k+1 is larger than the compensation of the corresponding RGB of pixel that has same gray level in reference data table k;
Search the compensate for brightness reference value that obtains the RGB corresponding with the GTG of described pixel in described brightness reference data table k and k+1, compensate for brightness reference value according to the RGB obtained, and the numerical value of the base level sweep trace of described horizontal partitioning k, obtain the compensation of the RGB that described pixel is corresponding.
5. method according to claim 3, is characterized in that, the pixel of the different GTGs that described the second tables of data comprises respectively the acquisition methods of corresponding analog reference voltage value comprise:
Determine the horizontal partitioning k that pixel is positioned at, 1≤k≤m determines Voltage Reference tables of data k and the k+1 corresponding with described horizontal partitioning k in the second subregion table of comparisons; The described second subregion table of comparisons comprises the sign of corresponding two the Voltage Reference tables of data of each horizontal partitioning, the pixel that each Voltage Reference tables of data includes different GTGs is distinguished the analog reference voltage value of corresponding RGB, and the analog reference voltage value in Voltage Reference tables of data k+1 is larger than the corresponding analog reference voltage value of pixel that has same gray level in Voltage Reference tables of data k;
Search the acquisition analog reference voltage value corresponding with the GTG of described pixel at Voltage Reference tables of data k and k+1, according to the analog reference voltage value obtained, and and the numerical value of the base level sweep trace of described horizontal partitioning k, obtain the analog reference voltage value that described pixel is corresponding.
6. according to the described method of the arbitrary claim of claim 1 to 5, it is characterized in that, in a described m horizontal partitioning, the quantity of the included horizontal scanning line of each horizontal partitioning equates; Perhaps,
In a described m horizontal partitioning along near an end of driving circuit to the direction of the end away from driving circuit, the quantity of the horizontal scanning line that each horizontal partitioning is included reduces gradually.
7. a subregion drives treating apparatus, it is characterized in that, comprising:
Module is set, for display frame vertically is divided into to m horizontal partitioning, m >=2, for each horizontal partitioning arranges respectively one first tables of data, described the first tables of data comprises that the pixel of different GTGs distinguishes the compensation of corresponding RGB, and the compensation that has the corresponding RGB of pixel of same gray level in corresponding the first tables of data of each horizontal partitioning vertically progressively increases;
Acquisition module, for first tables of data corresponding according to each horizontal partitioning, obtain the compensation of the RGB that object pixel is corresponding;
Display module, obtain corresponding driving voltage for the compensation of the RGB corresponding according to described object pixel, and carry out picture disply.
8. device according to claim 7, is characterized in that, described acquisition module specifically for:
Receive the low voltage difference LVDS signal that described object pixel is corresponding, according to the first tables of data corresponding to the described object pixel of described LVDS signal acquisition, find out the compensation of the RGB corresponding with the GTG of described object pixel in described the first tables of data.
9. device according to claim 8, is characterized in that, described arrange module also for:
For each horizontal partitioning arranges respectively one second tables of data, described the second tables of data comprises that the pixel of different GTGs distinguishes corresponding analog reference voltage value, and the corresponding analog reference voltage value of pixel that has same gray level in corresponding the second tables of data of each horizontal partitioning vertically progressively increases;
Correspondingly, described display module specifically for:
According to the second tables of data corresponding to the described object pixel of described LVDS signal acquisition, find out the analog reference voltage value corresponding with the GTG of described object pixel in described the second tables of data; And according to described object pixel compensation and the described analog reference voltage value of corresponding RGB, obtain corresponding driving voltage, and carry out picture disply.
10. device according to claim 9, is characterized in that, also comprises memory module, for storing described the first tables of data and described the second tables of data.
11. a display, is characterized in that, comprises display screen and that be connected with described display screen, described subregion driving treating apparatus as arbitrary as claim 7 to 10.
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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. |