CN108461072B - Method and device for adjusting driving signal of display panel - Google Patents
Method and device for adjusting driving signal of display panel Download PDFInfo
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Abstract
The embodiment of the disclosure provides a method and a device for adjusting a driving signal of a display panel. The effective display area of the display panel comprises a plurality of sub-pixels. The adjusting method comprises the step of executing at least one adjusting operation on each of at least one sub-pixel, wherein the adjusting operation comprises the following steps: acquiring a gray scale difference value N between a target gray scale and an actual gray scale of the sub-pixel; determining an adjustment coefficient T according to at least one of a first position of the sub-pixel in a first direction and a second position of the sub-pixel in a second direction, wherein the first direction intersects the second direction; and adjusting the driving signal applied to the sub-pixel according to an adjustment coefficient T.
Description
Technical Field
The embodiment of the disclosure relates to a method and a device for adjusting a driving signal of a display panel.
Background
Currently, flat display panels are increasingly divided. The phenomenon of nonuniform pixel charging rate exists for display panels such as ultra-high-definition display panels, double-gate display panels and the like, and the problems of picture flash, Mura, color nonuniformity and the like of the panels are caused.
Disclosure of Invention
Embodiments of the present disclosure provide an adjusting method of a driving signal of a display panel, an effective display area of the display panel including a plurality of sub-pixels, the adjusting method including performing at least one adjusting operation on each of at least one of the sub-pixels, the adjusting operation including: acquiring a gray scale difference value N between a target gray scale and an actual gray scale of the sub-pixel; determining an adjustment coefficient T according to at least one of a first position of the sub-pixel in a first direction and a second position of the sub-pixel in a second direction, wherein the first direction intersects the second direction; and adjusting the driving signal applied to the sub-pixel according to an adjustment coefficient T.
Another embodiment of the present disclosure provides an adjusting apparatus of a driving signal of a display panel including a plurality of sub-pixels located in an effective display area, the adjusting apparatus including: a gray scale difference value obtaining unit configured to obtain a gray scale difference value N between a target gray scale and an actual gray scale of at least one of the sub-pixels; a position acquisition unit configured to acquire at least one of a first position in a first direction and a second position in a second direction of the at least one sub-pixel, wherein the first direction intersects the second direction; and a control unit configured to determine an adjustment coefficient T according to at least one of a first position in a first direction and a second position in a second direction of the at least one sub-pixel, and adjust a driving signal applied to the at least one sub-pixel according to the adjustment coefficient T.
Thus, the display effect of the display panel can be improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments and the related art of the present disclosure, the drawings used in the description of the embodiments and the related art will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and for those skilled in the art, other drawings may be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a display panel suitable for a method for adjusting a driving signal according to an embodiment of the present disclosure;
fig. 2 is a flowchart of a method for adjusting a driving signal of a display panel according to an embodiment of the disclosure;
FIG. 3 is a plot of a first adjustment factor versus column number in a first direction;
FIG. 4 is a plot of a second adjustment factor versus row number in a second direction; and
fig. 5 is a block diagram of an adjusting apparatus for driving signals of a display panel according to an embodiment of the disclosure.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure more apparent, the technical solutions of the embodiments of the present disclosure will be described clearly and completely with reference to the drawings of the embodiments of the present disclosure. It is to be understood that the described embodiments are only a few embodiments of the present disclosure, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the disclosure without any inventive step, are within the scope of protection of the disclosure.
Taking TFT-LCD driving design as an example, the dot inversion method can achieve the best picture quality, but the power consumption is the largest, the requirements for heat dissipation and driving capability of the integrated circuit are high, and the cost investment of the product is large. Therefore, in the design process, a Z-frame is adopted to match with a column inversion driving mode, so that the dot inversion effect is realized, and the power consumption and the cost input of a driving module are reduced to a great extent. For example, double-gate and triple-gate designs are introduced. However, in the case of a color-mixed screen, the charging rates of the pixels in the odd-even rows are different, so that the chromaticity and luminance of the odd-even rows are different, and the luminance of the display on the entire panel is affected by flickering.
In order to solve these problems, the time of Gate Output Enable (GOE) can be adjusted to increase the charging time, but for pixels with normal charging rate, phenomena such as erroneous flushing and overshoot are easily caused, which results in abnormal display. The turn-on voltage of the TFT switch can be increased, but the space for increasing the turn-on voltage is very small, and the charging rate problem of a little large size is improved.
In addition, the panel has uneven process during production, and Mura problems caused by uneven process are more obvious in the panel with a slightly large size, which affects the yield of panel production. In view of the above problem, the currently used technology is D-Mura technology, but this technology requires a photographing apparatus with high sensitivity and definition, and for Mura with small area, large quantity and dispersion, the improvement effect is not obvious, and the investment and maintenance cost of the apparatus is also high.
The embodiment of the disclosure provides a method and a device for adjusting a driving signal of a display panel. The charging rate problem, the image quality problem, the Mura-type defect problem, and the like can be improved. For high-end products, the cost and power consumption are reduced while the image quality is ensured. For middle and low end products, the display quality of the panel can be further improved. And the later improvement can be performed aiming at the process defect, so that the yield of panel production is increased.
The embodiment of the disclosure provides a method for adjusting a driving signal of a display panel. Referring to fig. 2, the adjusting method includes: performing at least one adjustment operation on each of at least one of the sub-pixels. The adjusting operation comprises: acquiring a gray scale difference value N between a target gray scale and an actual gray scale of the sub-pixel; determining an adjustment coefficient T according to at least one of a first position in a first direction and a second position in a second direction of the sub-pixel; and adjusting the driving signal applied to the sub-pixel according to an adjustment coefficient T.
For example, the adjusting the driving signal applied to the at least one sub-pixel according to the adjustment coefficient T includes adjusting the driving signal applied to the at least one sub-pixel according to an adjusted gray-scale difference value L, where the adjusted gray-scale difference value L satisfies a formula L ═ N × T.
Hereinafter, a method and an apparatus for adjusting driving signals of a display panel according to an embodiment of the present disclosure are described with respect to a 3860 × 2160 high resolution display panel with a zigzag (Z-inversion) connection manner as an example.
For example, referring to fig. 1, the display panel 100 includes an effective display area AA composed of a plurality of sub-pixels arranged in 2160 rows and 3860 columns, for example. Only 6 rows and 8 columns of sub-pixels are exemplarily shown in fig. 1. The plurality of sub-pixels are defined by, for example, gate lines (not shown) extending in the x direction and data lines extending in the y direction. In the direction of x, the column numbers m of the columns are sequentially increased from 1 to 3840; in the y direction, the number n of line sequences of the plurality of lines is sequentially increased from 1 to 2160.
For example, a driving signal source DR for supplying a data driving voltage is positioned directly above the effective display area. The driving signal source DR supplies driving voltages to the data lines to charge the pixel electrodes of the sub-pixels, thereby realizing different gray scale display. In the present embodiment, the driving voltage supplied from the driving signal source DR of the display panel is propagated in the y direction through the plurality of data lines.
For example, the display panel 100 is an 8-bit liquid crystal display panel, and can display 256 levels of gray scales.
For example, the colors of the sub-pixels in the display panel include three primary colors of red (R), green (G), and blue (B) for synthesizing white light, in addition to white (W). Of course, the inclusion of other colors such as yellow (Y) is not excluded.
For example, in the display panel provided by the embodiment of the present disclosure, the plurality of sub-pixels includes sub-pixels of N colors, N is an integer greater than 3, and the sub-pixels of N colors are circularly arranged in each row. Taking the example that the color of the sub-pixels in the display panel is composed of RGBW, in the display panel, the RGBW sub-pixels are generally adopted to form a pixel unit, and the RGBW sub-pixels forming a pixel unit are arranged in the row direction, but it is not excluded that the RGBW sub-pixels forming a pixel unit are respectively arranged in two or more rows. The arrangement of the RGBW four sub-pixels in the same row may not be limited, and for example, the arrangement may be WRGB, RGWB, or the like.
For example, in the display panel provided in the embodiment of the present disclosure, the display panel generally further includes: and a plurality of data lines disposed at the column gaps of the sub-pixels. For example, a plurality of data lines are connected to the sources of the transistors in the plurality of sub-pixels. The connection relationship between the data line and the sub-pixel may adopt a normal (normal) structure, or a dual gate (dual gate) structure, which is not limited herein.
The common structure is that one data line is arranged on one side of each sub-pixel column, and one data line is connected with each sub-pixel on one side through a pixel switch and used for providing signals for each sub-pixel on one side.
The double-gate structure is characterized in that two grid lines are arranged at the line gaps of the sub-pixels, data lines are arranged at the column gaps of the sub-pixels at intervals, and one data signal line is connected with the sub-pixels on two sides through a pixel switch; compared with the common structure, the double-gate structure has the advantages that the number of the data lines is doubled, and the number of the grid lines is doubled.
In the zigzag structure, each data line is located in a gap between each sub-pixel column, and one data line alternately connects sub-pixels located on the left and right sides of different rows. That is, one data line is connected to only one sub-pixel in one row, and is connected to the sub-pixel on the left side in one row, and is connected to the sub-pixel on the right side in the other row; the zigzag structure is added with only one data line compared with the common structure. The zigzag structure has the advantage that Dot polarity inversion (Dot) of panel display can be realized as much as possible on the basis of saving electricity and ensuring charging rate, namely, the polarities of the upper, lower, left and right sub-pixels of any one sub-pixel are the same and are opposite to the polarity of the central sub-pixel.
For example, with the display panel 100 described above, the above operation may be performed for each of all the subpixels in 2160 rows and 3860 columns; alternatively, the above operation may be performed on each of the plurality of sub-pixels in a certain sub-region of the display panel 100, for example, if it is detected that there is charging rate unevenness or Mura defect in the region of the 1 st to 100 th rows and 1 st to 200 th columns of the display panel, or the luminance of the region is insufficient due to the defect of the backlight, the above operation may be performed on each of the plurality of sub-pixels in the region; alternatively, the above operation may be performed only on one sub-pixel in the display panel 100. The present disclosure is not limited by the range of the sub-pixels that perform the above-described adjustment method of the driving signal.
Next, the specific operation of the adjustment method of the driving signal is described by taking the sub-pixel in the 50 th row and the 1020 th column as an example.
Obtaining a gray scale difference value N between the target gray scale and the actual gray scale of the sub-pixel is executed as follows: the sub-pixel is provided with a first driving voltage Vt1, and the actual gray scale is 63 gray scales. For example, the actual gray scale may be obtained by a luminance measuring device. However, the sub-pixels should display 65 gray levels according to the desired display effect. Here, the 65 gray level is the target gray level of the sub-pixel. Therefore, the gray-scale difference N between the target gray scale and the actual gray scale of the sub-pixel is equal to 2.
For example, a plurality of gray scale differences between the target gray scale and the actual gray scale under the condition that different driving voltages are applied to the same sub-pixel may be measured, and an arithmetic mean may be taken as the gray scale difference N.
It is understood that the gray scale difference N may be a positive number or a negative number. When the target gray scale is less than the corresponding actual gray scale, the gray scale difference value can be a negative number.
The present disclosure finds that: for the entire effective display area AA, in the case where the same driving voltage is supplied, the charging rate of the sub-pixel located upstream is better than that of the sub-pixel located downstream in the source direction of the driving signal. Referring to fig. 1, the charging rate of the sub-pixel of the effective display area AA closest to the upper end area of the driving signal source DR is better than the charging rate of the sub-pixel of the lower end area farthest from the driving signal source DR. In addition, in order to eliminate the charging unevenness caused by the architecture, the panel itself has relatively weak charging areas, such as left and right end areas of the effective display area AA in fig. 1, and the central area is a sufficient charging area; that is, the charging rate of the sub-pixels gradually becomes worse in the y direction. In the x direction, the charging rates of the sub-pixels on the left and right sides are relatively low, and the charging rate of the sub-pixel at a position close to the center is relatively high. Thus, if no adjustment is made to the drive signal, the charging rate of the sub-pixels in the region of R1 in fig. 1 will be higher, while the charging rates of the sub-pixels in the regions of R2 and R3 will be lower.
Therefore, in the method for adjusting the driving signal of the display panel according to the embodiment of the present disclosure, the position information of the sub-pixel to be adjusted in the entire effective display area AA needs to be obtained to adjust the gray scale difference, and further, the gray scale voltage applied to the sub-pixel is adjusted to adjust the actual displayed gray scale.
For the subpixel in the 50 th row and the 1020 th column, the column number m is 1020, and the row number n is 50. For a 3840 × 2160 resolution display panel, the total number of columns Y is 3840 and the total number of rows X is 2160. Here, the column ordinal number m indicates a first position of the sub-pixel in the x-direction, and the row ordinal number n indicates a second position of the sub-pixel in the y-direction.
It is to be understood that in another embodiment, the position information of the sub-pixel to be adjusted may be obtained in other ways. For example, the specific coordinate values of the sub-pixel to be adjusted in the x and y directions are measured.
For example, measurements have found that the charging rate of the edgemost sub-pixel cell is about 0.8 times the charging rate of the centermost sub-pixel cell in the x-direction, with the same drive voltage provided. Therefore, from the curve of the first adjustment coefficient H in the x direction with respect to the column number m shown in fig. 3, the following formula (1) corresponding to the curve can be obtained:
H＝INT((1-(|m-Y/2|×2/Y)k1x (1-r1) + r1) x 1000+0.5)/1000 formula (1)
Wherein INT () represents a nearest integer rounded down to the variable in parentheses, k1 is a constant greater than 1, r1 is a constant greater than 0 and less than 1, and Y is the total number of columns. Here, for example, k1 is 2.2, r1 is 0.8, and Y is 3840. k1 is related to the source of the driving signal of the display panel, and r1 is related to the charging rate difference in the x direction. k1 and r1 can be adjusted according to different characteristics of different display panels.
For example, measurements have found that the charging rate of the most downstream sub-pixel element is 0.5 times the charging rate of the most upstream sub-pixel element in the y-direction, with the same drive voltage being supplied. Therefore, from the curve of the second adjustment coefficient V in the y direction with respect to the row number n shown in fig. 4, the following formula (2) corresponding to the curve can be obtained:
V＝INT(((|n-X|/X)k2x (1-r2) + r2) x 1000+0.5)/1000 formula (2)
Wherein INT () represents the nearest integer rounded down to the variable in parentheses, k2 is a constant greater than 1, r2 is a constant greater than 0 and less than 1, and X is the total number of rows. Here, k2 is 2.2, r2 is 0.5, and X is 2160, for example. k1 is related to the source of the driving signal of the display panel, and r2 is related to the charging rate difference in the y direction. k2 and r2 can be adjusted according to different characteristics of different display panels.
In the present embodiment, the adjustment coefficient T is determined from both the first adjustment coefficient H in the x direction and the second adjustment coefficient V in the y direction. In another embodiment, the adjustment coefficient T may also be determined based on one of the first adjustment coefficient H in the x-direction and the second adjustment coefficient V in the y-direction.
In this embodiment, the adjustment coefficient T, the first adjustment coefficient H, and the second adjustment coefficient V satisfy the following formula (3), for example:
T＝(H×V)-1formula (3)
Thus, for a sub-pixel of row 50 and column 1020, determining an adjustment coefficient T from at least one of a first position in a first direction and a second position in a second direction of the sub-pixel is performed as:
substituting m to 1020 into the above formula (1) to obtain a first adjustment coefficient H to 0.838;
substituting n-50 into the above formula (2) to obtain a second adjustment coefficient V-0.975; and
substituting H ═ 0.838 and V ═ 0.975 into the above equation (3) to obtain an adjustment coefficient T ═ 1.224; and
the adjusted gray-scale difference value L is 2.448 by substituting T1.224 into the following equation (4).
L is N × T formula (4)
After obtaining the adjusted gray-scale difference value L corresponding to the sub-pixel of row 50 and column 1020, the adjusted gray-scale difference value L may be used to adjust the driving voltage signal applied to the sub-pixel by the timing controller. For example, a first driving voltage Vt1 (e.g., V1 ═ 10V) is applied to the pixel electrodes of the sub-pixels in the 50 th row and the 1020 th column, and the actual gray scale G1 is measured as 63 gray scales; the adjusted gray scale G2 satisfies: G2-G1 + L, therefore, the adjusted gray level G2 is 65.448. Since the gray scale displayed by a sub-pixel has a known theoretical correlation with its luminance, and the luminance of the sub-pixel also has a known theoretical correlation with the driving voltage signal applied to its pixel voltage, the theoretical relationship between the different gray scale values and the driving voltage applied to the pixel electrode of the sub-pixel can be known. For example, in the present embodiment, the gray scale of the sub-pixel is positively correlated with the absolute value of the driving voltage applied thereto. Therefore, the second driving voltage signal Vt2 (e.g., 10.5V) which should be theoretically applied can be obtained corresponding to the gray level of 65.448; the second driving voltage signal Vt2 is actually applied to the pixel electrode of the sub-pixel in the row 50 and column 1020 so that the sub-pixel actually displays the target gray level, i.e., the gray level of 65.
In the above embodiment, when m varies in any interval in the range of 1 to Y/2, H increases as m increases; when m varies in any interval ranging from Y/2 to Y, H decreases as m increases. H has a maximum value close to 1 when m ═ Y/2. Thus, for the display panel shown in fig. 1, in the x direction, the H value corresponding to the middle region is relatively large and close to 1, and the H values corresponding to the both side edge regions are relatively small and close to 0.8.
In the above embodiment, V has a maximum value close to 1 when n is 1, and decreases as n becomes larger, and has a minimum value equal to 0.5 when n is 2160.
Because T is (H is multiplied by V)-1Thus, referring to fig. 1, the adjustment coefficient T corresponding to the sub-pixel in the R1 area of the display panel 100 is relatively small and close to 1, and the adjustment coefficient T corresponding to the sub-pixel in the R1 area of the display panel is relatively large, for example, greater than 2. Therefore, the charging rate of the relatively weak charging area of the panel can be well improved, and the uniformity of the charging rate of the whole display panel is improved.
It is to be understood that embodiments of the present disclosure do not limit the specific functional relationship of H with respect to m, nor V with respect to n. One skilled in the art can fit the data to obtain the corresponding H vs m functional relationship according to the desired H vs m curve form. Similarly, the skilled person can also obtain the corresponding V vs. n functional relationship by data fitting according to the desired V vs. n curve form.
In one example, H increases with increasing m when m varies over the interval of [1,1800 ]; h remains constant as m increases when m varies over the interval of [1801,2039 ]; when m varies over the interval of [2040,3840], H is smaller as m increases.
In another example, when m varies over the interval of [1,759], H decreases with increasing m; when m varies over the interval of [760,2160], V decreases with increasing n.
It is understood that, after the adjustment operation is performed once on the sub-pixels in the row 50 and the column 1020, the actual gray scale displayed by the sub-pixels at this time when the second driving voltage signal Vt2 is applied to the sub-pixels can be tested. If the gray scale difference value between the displayed actual gray scale and the target gray scale is less than a preset value, the adjustment of the sub-pixel can be finished; otherwise, the sub-pixel may be adjusted more times until the gray-scale difference between the displayed actual gray-scale and the target gray-scale is smaller than the predetermined value.
Although the adjustment method provided by the embodiment of the present disclosure is described above for one sub-pixel, it is understood that the adjustment operation may be performed on a plurality of sub-pixels simultaneously or sequentially.
By adopting the method for adjusting the driving signals, the problems of uneven charging rate, poor Mura and the like of all TFT-LCD display panels can be solved.
By adopting the adjusting method provided by the embodiment of the disclosure, for a high-end product, the cost and the power consumption are reduced while the image quality is ensured. For middle and low-end products, the display quality of the panel can be further improved, the competitiveness is enhanced, and the requirements of market quality are met. And the later improvement can be performed aiming at the process defect, so that the yield of panel production is increased.
In addition, the method provided by the embodiment of the disclosure can greatly improve the display brightness of the panel, enhance the weavability, enhance the matching flexibility of the panel and the backlight, reduce the development cost of the display panel and reduce the cost of the backlight at the end of the whole machine.
Another embodiment of the present disclosure provides an apparatus 200 for adjusting a driving signal of a display panel 100. Referring to fig. 1, the display panel 100 includes a plurality of sub-pixels R, G, B and W located in an effective display area AA. Referring to fig. 5, the adjusting apparatus 200 includes: a gray-scale difference value obtaining unit 201 configured to obtain a gray-scale difference value N between a target gray scale and an actual gray scale of at least one of the sub-pixels; a position acquisition unit 202 configured to acquire at least one of a first position in a first direction x and a second position in a second direction x of the at least one sub-pixel, wherein the first direction intersects the second direction; a control unit 203 configured to determine an adjustment coefficient T according to at least one of a first position in a first direction and a second position in a second direction of the at least one sub-pixel, and adjust a driving signal applied to the sub-pixel according to an adjusted gray-scale difference value L satisfying a formula L-N × T.
Here, the grayscale difference value acquisition unit 201 includes, for example, a brightness measurer such as a CCD (Charge-coupled Device) camera. The CCD camera can acquire the luminance value of each sub-pixel.
For example, the plurality of sub-pixels are arranged in X rows (2160 rows) extending in the first direction (see the X-direction of fig. 1) and Y columns (3840 columns) extending in the second direction (see the Y-direction of fig. 1).
In this embodiment, the column ordinal number m represents the first position of the sub-pixel of the corresponding column in the first direction, and the row ordinal number n represents the second position of the sub-pixel of the corresponding row in the second direction.
The control unit 203 is configured to determine the adjustment coefficient T from at least one of a first adjustment coefficient H and a second adjustment coefficient V, where H is a power function of the column number m; v is a power function of the row number n.
For example, referring to fig. 3, H has a maximum value when m ═ Y/2. The first adjustment coefficient H satisfies the following formula:
H＝INT((1-(|m-Y/2|×2/Y)k1×(1-r1)+r1)×1000+0.5)/1000,
wherein INT () represents a variable in parentheses rounded down to the nearest integer, k1 is a constant greater than 1, and r1 is a constant greater than 0 and less than 1. For a display panel with a resolution of 3840 × 2160, Y is 3860.
For example, referring to fig. 1 and 4, in the effective display area AA, the driving signals propagate along the second direction y, and the row sequence number n sequentially increases in the second direction y.
For example, the second adjustment coefficient V decreases as n becomes larger. The second adjustment coefficient V satisfies the following formula:
V＝INT(((|n-X|/X)k2×(1-r2)+r2)×1000+0.5)/1000,
wherein INT () represents a variable in parentheses rounded down to the nearest integer, k2 is a constant greater than 1, and r2 is a constant greater than 0 and less than 1. For a display panel with a resolution of 3840 × 2160, X is 2160.
For example, in the present embodiment, the adjustment coefficient T, the first adjustment coefficient H, and the second adjustment coefficient V satisfy the formula T ═ H × V-1；
For example, referring to fig. 1, the display panel 100 further includes a timing controller 101. The control unit 101 is configured to adjust the driving signals applied to the sub-pixels via the timing controller 101 according to at least one of the first position and the second position and the adjusted gray-scale difference value L.
It is to be understood that, although the above embodiments are exemplified by an LCD display panel, the adjusting method and the adjusting apparatus provided by the embodiments of the disclosure can also be extended to other display fields.
It should be noted that any one of the grayscale difference value obtaining unit, the position obtaining unit, and the control unit in this embodiment may be a separately provided processor, may be implemented by being integrated into a certain processor of the apparatus, or may be stored in a memory in the form of program codes, and the functions of the above units may be called and executed by one processor.
Those of ordinary skill in the art will understand that: all or part of the steps for implementing the method embodiments may be implemented by hardware related to program instructions, and the program may be stored in a computer readable storage medium, and when executed, the program performs the steps including the method embodiments; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
The above description is only a specific implementation of the embodiments of the present disclosure, but the scope of the embodiments of the present disclosure is not limited thereto, and any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the embodiments of the present disclosure, and all the changes or substitutions should be covered by the scope of the embodiments of the present disclosure. Therefore, the protection scope of the embodiments of the present disclosure shall be subject to the protection scope of the claims.
Claims (15)
1. A method of adjusting a driving signal of a display panel, an effective display area of the display panel including a plurality of sub-pixels, the method comprising performing at least one adjustment operation on each of at least one of the sub-pixels, the adjustment operation comprising:
acquiring a gray scale difference value N between a target gray scale and an actual gray scale of the sub-pixel;
determining an adjustment coefficient T according to at least one of a first position of the sub-pixel in a first direction and a second position of the sub-pixel in a second direction, wherein the first direction intersects the second direction; and
adjusting the drive signal applied to the sub-pixel in accordance with an adjustment coefficient T,
wherein the adjusting the driving signal applied to the sub-pixel according to the adjustment coefficient T includes adjusting the driving signal applied to the sub-pixel according to an adjusted gray-scale difference value L, where the adjusted gray-scale difference value L satisfies a formula L ═ N × T.
2. The adjustment method according to claim 1, wherein the plurality of sub-pixels are arranged in X rows extending in the first direction and Y columns extending in the second direction,
a column ordinal number m denotes the first position in the first direction of a sub-pixel of a corresponding column, a row ordinal number n denotes the second position in the second direction of a sub-pixel of a corresponding row,
the adjusting coefficient T is determined according to at least one of a first adjusting coefficient H and a second adjusting coefficient V, wherein the first adjusting coefficient H is a power function of the sequence number m; the second adjustment factor V is a power function of the line number n.
3. The adjustment method according to claim 2, wherein H has a maximum value when m ═ Y/2.
4. The adjustment method according to claim 3, wherein the first adjustment coefficient H satisfies the following formula:
H＝INT((1-(|m-Y/2|×2/Y)k1×(1-r1)+r1)×1000+0.5)/1000
wherein INT () represents a variable in parentheses rounded down to the nearest integer, k1 is a constant greater than 1, and r1 is a constant greater than 0 and less than 1.
5. The adjustment method according to claim 2, wherein, within the effective display area, the drive signal propagates along the second direction, the number n of line sequences increases in the second direction in order, and the second adjustment coefficient V decreases as n becomes larger.
6. The adjustment method according to claim 5, wherein the second adjustment coefficient V satisfies the following formula:
V＝INT(((|n-X|/X)k2×(1-r2)+r2)×1000+0.5)/1000
wherein INT () represents a variable in parentheses rounded down to the nearest integer, k2 is a constant greater than 1, and r2 is a constant greater than 0 and less than 1.
7. The adjustment method according to any one of claims 2 to 6, wherein the adjustment coefficient T, the first adjustment coefficient H, and the second adjustment coefficient V satisfy the formula T ═ (H × V)-1。
8. An adjustment apparatus of a driving signal of a display panel including a plurality of sub-pixels located in an effective display area, the adjustment apparatus comprising:
a gray scale difference value obtaining unit configured to obtain a gray scale difference value N between a target gray scale and an actual gray scale of at least one of the sub-pixels;
a position acquisition unit configured to acquire at least one of a first position in a first direction and a second position in a second direction of the at least one sub-pixel, wherein the first direction intersects the second direction; and
a control unit configured to determine an adjustment coefficient T according to at least one of a first position in a first direction and a second position in a second direction of the at least one sub-pixel, and to adjust a driving signal applied to the at least one sub-pixel according to the adjustment coefficient T,
wherein the adjusting the driving signal applied to the at least one sub-pixel according to the adjustment coefficient T includes adjusting the driving signal applied to the at least one sub-pixel according to an adjusted gray-scale difference value L, where the adjusted gray-scale difference value L satisfies a formula L ═ N × T.
9. The adjustment device of claim 8, wherein the plurality of sub-pixels are arranged in X rows extending in the first direction and Y columns extending in the second direction,
wherein a column ordinal number m denotes the first position in the first direction of a sub-pixel of a corresponding column, a row ordinal number n denotes the second position in the second direction of a sub-pixel of a corresponding row,
the control unit is configured to determine the adjustment coefficient T from at least one of a first adjustment coefficient H and a second adjustment coefficient V, wherein the first adjustment coefficient H is a power function of the column number m; the second adjustment factor V is a power function of the line number n.
10. The adjustment device of claim 9, wherein H has a maximum value when m ═ Y/2.
11. The adjustment device according to claim 10, wherein the first adjustment coefficient H satisfies the following formula:
H＝INT((1-(|m-Y/2|×2/Y)k1×(1-r1)+r1)×1000+0.5)/1000,
wherein INT () represents a variable in parentheses rounded down to the nearest integer, k1 is a constant greater than 1, and r1 is a constant greater than 0 and less than 1.
12. The adjustment apparatus according to claim 9, wherein the drive signal propagates along the second direction within the effective display area, the number n of line sequences increases in the second direction in order, and the second adjustment coefficient V decreases as n becomes larger.
13. The adjustment device according to claim 12, wherein the second adjustment coefficient V satisfies the following formula:
V＝INT(((|n-X|/X)k2×(1-r2)+r2)×1000+0.5)/1000,
wherein INT () represents a variable in parentheses rounded down to the nearest integer, k2 is a constant greater than 1, and r2 is a constant greater than 0 and less than 1.
14. The adjustment device according to any one of claims 9 to 13, wherein the adjustment coefficient T, the first adjustment coefficient H, and the second adjustment coefficient V satisfy the formula T ═ hxv.
15. The adjustment device according to any one of claims 8 to 14, wherein the display panel further comprises a timing controller, and the control unit is configured to control the timing controller to adjust the driving signal applied to the at least one sub-pixel according to at least one of the first position and the second position and the adjusted gray scale difference value L.
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