Display panel and driving method

Abstract

This invention provides a display panel and a driving method. When the information to be displayed is the same as the information of an abnormal image, the driving method determines the polarity of each sub-pixel according to a first polarity reversal method and obtains a plurality of corresponding first target grayscale values ​​according to a plurality of initial grayscale values ​​in a first overdrive compensation table. When the information to be displayed is different from the information of an abnormal image, the method determines the polarity of each sub-pixel according to a second polarity reversal method (different from the first polarity reversal method), thereby controlling the brightness of the plurality of sub-pixels to display the display image of the frame to be displayed, so as to improve the color shift problem.

Description

Technical Field

[0001] This invention relates to the field of display technology, and more specifically to display panels and driving methods. Background Technology

[0002] Throughout the development of monitors, color shift has always been a key image quality issue that has received considerable attention. For certain special images, due to the significant fluctuations in the data voltage transmitted through different data lines, the charging levels of sub-pixels of different colors may differ, resulting in color shift in the image. Summary of the Invention

[0003] The purpose of this invention is to provide a display panel and a driving method to improve the color shift phenomenon of the display screen in existing displays.

[0004] This invention provides a driving method for a display panel, applied to a display panel comprising a plurality of sub-pixels, including:

[0005] Obtain abnormal image information and the image information to be displayed of the frame to be displayed, wherein the image information to be displayed includes multiple initial grayscale values ​​of multiple sub-pixels in the frame to be displayed;

[0006] If the information to be displayed is the same as the abnormal information, then the polarity of each sub-pixel is determined according to the first polarity reversal method, and multiple initial grayscale values ​​are obtained according to the first overdrive compensation table to obtain multiple corresponding first target grayscale values.

[0007] The brightness of the multiple sub-pixels is controlled according to the polarity of each sub-pixel and the multiple first target grayscale values ​​to display the image to be displayed of the frame to be displayed;

[0008] If the information to be displayed is different from the abnormal information, the polarity of each sub-pixel is determined according to the second polarity reversal method, wherein the first polarity reversal method is different from the second polarity reversal method.

[0009] The brightness of multiple sub-pixels is controlled according to the polarity of each sub-pixel to display the display screen of the frame to be displayed.

[0010] In some embodiments, the step of determining the polarity of each sub-pixel according to the second polarity reversal method includes:

[0011] Multiple initial grayscale values ​​are obtained according to a second overdrive compensation table to obtain multiple corresponding second target grayscale values, wherein the second overdrive compensation table is different from the first overdrive compensation table;

[0012] The step of controlling the brightness of multiple sub-pixels according to the polarity of each sub-pixel to display the image to be displayed of the frame to be displayed includes:

[0013] The brightness of the plurality of sub-pixels is controlled according to the polarity of each sub-pixel and the plurality of second target grayscale values ​​to display the image to be displayed of the frame to be displayed.

[0014] In some embodiments, the first overdrive compensation table includes a plurality of first grayscale values, a plurality of second grayscale values ​​and a plurality of first compensation values, wherein each first grayscale value and each second grayscale value corresponds to a first compensation value.

[0015] The second overdrive compensation table includes multiple first grayscale values, multiple second grayscale values, and multiple second compensation values, with each first grayscale value and each second grayscale value corresponding to a second compensation value;

[0016] Wherein, at least one of the first compensation values ​​is different from the corresponding second compensation value.

[0017] In some embodiments, the display panel further includes a plurality of data lines, each of the data lines being electrically connected to a corresponding plurality of the sub-pixels;

[0018] The step of obtaining multiple first target grayscale values ​​based on multiple initial grayscale values ​​in a first overdrive compensation table includes:

[0019] Based on the two initial grayscale values ​​corresponding to the two sub-pixels that are electrically connected to the same data line and are turned on sequentially, the first grayscale value and the corresponding second grayscale value in the first overdrive compensation table are determined.

[0020] Based on the first compensation value corresponding to the first grayscale value and the second grayscale value;

[0021] The initial grayscale value of the later-activated sub-pixel among the two sequentially activated sub-pixels is compensated according to the first compensation value to obtain the corresponding first target grayscale value.

[0022] In some embodiments, the steps of determining the polarity of each sub-pixel according to a first polarity reversal method, and obtaining a plurality of corresponding first target grayscale values ​​according to a plurality of initial grayscale values ​​in a first overdrive compensation table, include:

[0023] Multiple first target grayscale values ​​are compensated according to the first white balance compensation table to obtain multiple corresponding third target grayscale values;

[0024] The step of obtaining multiple second target grayscale values ​​based on multiple initial grayscale values ​​in the second overdrive compensation table includes:

[0025] Multiple second target grayscale values ​​are compensated according to a second white balance compensation table to obtain multiple corresponding fourth target grayscale values. The second white balance compensation table is different from the first white balance compensation table.

[0026] In some embodiments, the display panel further includes a plurality of data lines, each of the data lines being electrically connected to a corresponding plurality of the sub-pixels;

[0027] The step of determining the polarity of each sub-pixel according to the first polarity reversal method includes:

[0028] According to the first polarity reversal method, the polarity of the two initial grayscale values ​​corresponding to at least two sub-pixels that are electrically connected to the same data line and are turned on sequentially is set to be different.

[0029] The step of determining the polarity of each sub-pixel according to the second polarity reversal method includes:

[0030] According to the second polarity reversal method, the polarity of the two initial grayscale values ​​corresponding to at least two sub-pixels that are electrically connected to the same data line and are turned on sequentially is set to be the same.

[0031] In some embodiments, the step of setting the polarity of the two initial grayscale values ​​corresponding to at least two sub-pixels electrically connected to the same data line and sequentially turned on according to the first polarity reversal method includes:

[0032] According to the first polarity reversal method, the polarity of the two initial grayscale values ​​corresponding to at least m sub-pixels that are electrically connected to the same data line and are turned on sequentially is set to be the same.

[0033] The step of setting the polarity of the two initial grayscale values ​​corresponding to at least two sub-pixels electrically connected to the same data line and sequentially turned on according to the second polarity reversal method includes:

[0034] According to the second polarity reversal method, the polarity of the two initial grayscale values ​​corresponding to at least n sub-pixels that are electrically connected to the same data line and sequentially turned on is set to be the same, where m and n are both positive integers greater than 1, and m is less than n.

[0035] In some embodiments, the step of controlling the brightness of the plurality of sub-pixels according to the polarity of each sub-pixel and the plurality of first target grayscale values ​​to display the image to be displayed of the frame to be displayed includes:

[0036] The first target data voltage is determined based on the grayscale voltage meter and each first target grayscale value, and the first target data voltage corresponding to the polarity of the sub-pixel is applied to the corresponding sub-pixel.

[0037] The present invention also provides a display panel, comprising:

[0038] Memory, used to store instructions;

[0039] A controller is configured to execute the driving method for the display panel as described above, according to the instructions.

[0040] In some embodiments, the controller includes:

[0041] The on-chip system is used to obtain a plurality of corresponding first target grayscale values ​​based on a plurality of initial grayscale values ​​in a first overdrive compensation table;

[0042] A source driver is used to control the brightness of a plurality of sub-pixels based on the polarity of each sub-pixel and a plurality of first target grayscale values.

[0043] This invention provides a display panel and a driving method. When the information to be displayed is the same as the abnormal image information, the polarity of each sub-pixel is determined according to a first polarity reversal method, and a plurality of first target grayscale values ​​are obtained according to a first overdrive compensation table of a plurality of initial grayscale values. When the information to be displayed is different from the abnormal image information, the polarity of each sub-pixel is determined according to a second polarity reversal method. The first polarity reversal method is different from the second polarity reversal method. By making a differentiated setting for the polarity reversal method of the display panel under abnormal image conditions compared to the polarity reversal method under non-abnormal image conditions, and by superimposing the first overdrive compensation table to compensate the initial grayscale values, the color shift problem of the displayed image is effectively improved. Attached Figure Description

[0044] The present invention will be further described below with reference to the accompanying drawings. It should be noted that the accompanying drawings described below are merely for illustrating some embodiments of the present invention. Those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0045] Figure 1 The polarity distribution diagram (comparative example) of multiple sub-pixels of the display panel provided in the embodiment of the present invention under abnormal screen conditions corresponding to the second polarity reversal mode.

[0046] Figure 2 The polarity distribution diagram of multiple sub-pixels of the display panel corresponding to the first polarity reversal mode under abnormal screen conditions provided in the embodiment of the present invention (embodiment).

[0047] Figures 3 to 8 A flowchart of a display panel driving method provided in an embodiment of the present invention. Detailed Implementation

[0048] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0049] In the description of this invention, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" may explicitly or implicitly include one or more of the stated features. Furthermore, it should be noted that the accompanying drawings only provide structures closely related to the invention, omitting some details less relevant to the invention. The purpose is to simplify the drawings and make the inventive points clear at a glance, not to indicate that the actual device is identical to the accompanying drawings. Figure 1 The term "equal to" is not intended to limit the actual device. In particular, the use of "equal to" in this invention can, but is not limited to, meaning that two things are equal, or it can mean that the difference between the two things is very small, for example, the absolute value of the difference between the two things is less than a threshold value. This threshold value can be set according to the actual situation, and it is intended to simply indicate that there is such a concept of "equal to".

[0050] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase at various points in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0051] The present invention provides a driving method for a display panel, which may include, but is not limited to, the following embodiments and combinations thereof.

[0052] In some embodiments, the driving method for the display panel is applied to the display panel, such as... Figure 1 and Figure 2 As shown, the display panel 100 includes multiple sub-pixels (including multiple red sub-pixels R, multiple green sub-pixels G, and multiple blue sub-pixels B), such as Figure 3 As shown, the driving method for the above-mentioned display panel may include, but is not limited to, the following steps and combinations thereof.

[0053] S1, acquire abnormal screen information and the screen information to be displayed of the frame to be displayed, wherein the screen information to be displayed includes multiple initial grayscale values ​​of multiple sub-pixels in the frame to be displayed.

[0054] Multiple subpixels can be divided into multiple pixel units 10. Each pixel unit may include a red subpixel R that emits red light, a green subpixel G that emits green light, and a blue subpixel B that emits blue light. The color and brightness of each pixel unit are determined by the brightness of the light emitted by each of the above three color subpixels.

[0055] Specifically, such as Figure 1 and Figure 2 As shown, the display panel 100 may include multiple gate lines 20 and multiple data lines 30. Each gate line 20 is electrically connected to a corresponding plurality of sub-pixels, and each data line 30 is electrically connected to a corresponding plurality of sub-pixels. For ease of description, this invention is illustrated by an example in which multiple sub-pixels are arranged along the row and column directions, and the pixel unit 10 includes red sub-pixels R, green sub-pixels G, and blue sub-pixels B arranged horizontally to the right (i.e., sub-pixels in the same column are all red sub-pixels R, green sub-pixels G, or blue sub-pixels B), but it is not limited thereto.

[0056] For each frame to be displayed, each sub-pixel needs to emit light of corresponding brightness according to its corresponding grayscale value. Specifically, the gate signal transmitted by each gate line 20 can control the corresponding multiple sub-pixels to turn on. At the same time, each data line 30 can transmit multiple data voltages corresponding to multiple grayscale values ​​to the corresponding multiple sub-pixels. And while each row of sub-pixels is turned on by the corresponding gate signal, the multiple data lines 30 respectively output multiple data voltages corresponding to that row of sub-pixels to control that row of sub-pixels to emit light of corresponding brightness. In this way, multiple rows of sub-pixels emit light in sequence and remain so until the start of the next frame to present the display image of the frame to be displayed.

[0057] The image information to be displayed obtained in S1 may include the initial grayscale values ​​of all or some of the sub-pixels in the frame to be displayed. The initial grayscale values ​​here can be understood as the grayscale values ​​of the corresponding sub-pixels generated by the signal source without any compensation or image quality processing.

[0058] Each abnormal image can have corresponding abnormal image information. Similarly, the abnormal image information can include the grayscale values ​​of multiple or some sub-pixels under the abnormal image. In this embodiment, the number of abnormal images (equal to the number of abnormal image information) is not limited, and at least one abnormal image information can be stored in advance. Furthermore, in this embodiment, it is only necessary to satisfy the distribution of the initial grayscale values ​​of at least some sub-pixels in the frame to be displayed to meet the abnormal image information to determine whether the frame to be displayed is an abnormal image.

[0059] An abnormal image can be understood as an image that is prone to color shift without relevant interference. It can be considered that in an abnormal image, the voltage jump between two adjacent data lines transmitted on the same data line is too large, causing the sub-pixel corresponding to the latter to have insufficient charging. The light emission color of the sub-pixels with a larger number of insufficient charging problems in the whole image is darker. Therefore, the image color is biased towards the light emission color of the sub-pixels with fewer insufficient charging problems, thus causing color shift. Therefore, this image can be called an abnormal image.

[0060] Therefore, abnormal images can be defined based on factors such as the user's tolerance for color deviation. This invention does not impose any limitations on this definition. The purpose is to illustrate that at least one abnormal image information corresponding to at least one abnormal image can be pre-stored and obtained through S1.

[0061] like Figure 1 and Figure 2 As shown, this example illustrates one type of abnormal image. It can be assumed that multiple pixel units 10 alternately display high grayscale (e.g., the highest grayscale) and low grayscale (e.g., 0 grayscale) in both the row and column directions. For ease of description, Figure 1 and Figure 2 The example described uses the case where each data line 30 is electrically connected to multiple sub-pixels that are alternately located on its left and right sides. Of course, the data line 30 located on the far left can be electrically connected only to multiple sub-pixels located on its right (first column) in odd-numbered rows, and the data line 30 located on the far right can be electrically connected only to multiple sub-pixels located on its left (last column) in even-numbered rows.

[0062] S2, determine whether the information to be displayed is the same as the abnormal information.

[0063] As discussed above, after obtaining at least one abnormal screen information corresponding to at least one abnormal screen through S1, it is possible to compare the screen information to be displayed (the frame that has not yet been displayed) with the abnormal screen information through S2, thereby determining whether the frame to be displayed is an abnormal screen, that is, whether it is prone to color shift without relevant interference.

[0064] If the information to be displayed differs from the information of the abnormal screen, then execute:

[0065] S3, determine the polarity of each sub-pixel according to the second polarity reversal method, wherein the first polarity reversal method is different from the second polarity reversal method.

[0066] When the information to be displayed is different from the information of an abnormal image, it can be considered that the frame to be displayed is not an abnormal image, and color deviation is not likely to occur even without relevant interference.

[0067] However, it should be noted that in this embodiment, the display panel 100 can be a liquid crystal display panel. Considering the risk of liquid crystal molecules failing under the action of voltage of the same polarity for a long time, in this embodiment, the polarity of each sub-pixel is determined according to the second polarity reversal method. The second polarity reversal method here can be understood as avoiding each sub-pixel from continuously deflecting according to the voltage of the same polarity in multiple frames, thereby reducing the risk of liquid crystal molecule failure.

[0068] S4, control the brightness of multiple sub-pixels according to the polarity of each sub-pixel to display the display screen of the frame to be displayed.

[0069] Understandably, the polarity of each sub-pixel in each frame (including the frame to be displayed) can be determined according to the second polarity reversal method. Then, according to the polarity, the corresponding data voltage is applied to the sub-pixel (pixel electrode in it), so that the corresponding liquid crystal molecules are deflected under the voltage difference between the data voltage and the common voltage. Similarly, the liquid crystal molecules corresponding to all sub-pixels can be deflected in the above way, thereby displaying the display screen of the frame to be displayed.

[0070] Specifically, such as Figure 4 As shown, S3 may include, but is not limited to, the following steps:

[0071] S31, according to the second polarity reversal method, the polarity of the two initial grayscale values ​​corresponding to at least two sub-pixels that are electrically connected to the same data line and are turned on in sequence is set to be the same.

[0072] Under normal circumstances, the second polarity reversal method of S3 in this embodiment can be defined as setting the polarity of the two initial grayscale values ​​corresponding to at least two sub-pixels that are electrically connected to the same data line and turned on in sequence to be the same. That is, the data signal output by the same data line includes at least two data voltages with the same polarity arranged in sequence, so that the liquid crystal molecules corresponding to the later data voltage in the two liquid crystal molecules at the corresponding two sub-pixels have a faster deflection speed (compared to the case where the polarities of the two data voltages are different), thereby improving the brightness of the displayed image.

[0073] The polarity distribution of the multiple sub-pixels determined according to the second polarity reversal method described above can be referenced to, for example... Figure 1 Polarity distribution of multiple sub-pixels (not referenced) Figure 1 Multiple initial grayscale values ​​in the data, because Figure 1This illustrates not the display information different from abnormal screen information, but rather the situation corresponding to an abnormal screen. That is, taking sub-pixels as the smallest unit, the polarity of the sub-pixels is set to alternate between positive "+" and negative "-" in both the row and column directions. Combined with the aforementioned electrical connection method between multiple data lines 30 and multiple sub-pixels, this second polarity reversal method can ensure that the polarity of multiple sub-pixels electrically connected to each data line 30 is the same.

[0074] Therefore, when the information to be displayed is different from abnormal information (when the risk of color deviation is small), the brightness of the displayed image can be improved by using the second polarity inversion method to drive multiple sub-pixels to emit light.

[0075] If the information to be displayed is the same as the information of the abnormal screen, then execute:

[0076] like Figure 3 As shown, following S4 above, the following steps are also included:

[0077] S5, determine the polarity of each sub-pixel according to the first polarity reversal method, and compensate multiple initial grayscale values ​​according to the first overdrive compensation table to obtain multiple corresponding first target grayscale values.

[0078] If the information to be displayed is the same as the information of an abnormal image, then the frame to be displayed can be considered an abnormal image. If no relevant intervention is performed, color deviation may easily occur.

[0079] It is important to note that, such as Figure 1 The diagram illustrates the determination of the polarity of multiple sub-pixels using the second polarity reversal method when the information to be displayed is identical to the information in an abnormal image. At this time, because the data line 30 electrically connected to the high grayscale green sub-pixel G in the same column is also electrically connected to the low grayscale red sub-pixel R or blue sub-pixel B between the corresponding two adjacent green sub-pixels G, all columns of green sub-pixels G are in a heavy-load state (corresponding to...). Figure 1 Similarly, in some columns, the red sub-pixels R and blue sub-pixels B also have overloaded states (corresponding to "G"). Figure 1 In the case of "R heavy" and "B heavy", there is a situation where both sides of data line 30 are electrically connected to multiple red sub-pixels R and multiple blue sub-pixels B, which are all high grayscale and are staggered on both sides. In this case, the heavy red sub-pixels R and blue sub-pixels B are in a light load state (corresponding to Figure 1 In the case of "R / B light", the number of each of the red sub-pixels R and blue sub-pixels B is approximately half the total number of columns of their respective color sub-pixels. In this case, the actual displayed image is biased towards the mixed color of the red sub-pixels R and blue sub-pixels B, that is, biased towards purple.

[0080] Understandably, in this embodiment, when the information to be displayed is the same as the abnormal information, a first polarity inversion method, different from the second polarity inversion method described above, is used to determine the polarity of multiple sub-pixels. For the same information to be displayed, it can be considered that using the first polarity inversion method can improve the color shift problem when using the second polarity inversion method.

[0081] Specifically, such as Figure 4 As shown, following S31 above, that is, S5 above may include, but is not limited to, the following steps:

[0082] S51, according to the first polarity reversal method, the polarity of the two initial grayscale values ​​corresponding to at least two sub-pixels that are electrically connected to the same data line and are turned on in sequence is set to be different.

[0083] Understandably, in abnormal image conditions, the first polarity reversal method of S5 in this embodiment can be defined as setting the polarity of the two initial grayscale values ​​corresponding to at least two sub-pixels that are electrically connected to the same data line and turned on sequentially to be different. That is, the data signal output by the same data line includes at least two data voltages with different polarities arranged sequentially, so that the deflection speed of the liquid crystal molecules corresponding to the later data voltage in the two liquid crystal molecules at the corresponding two sub-pixels is reduced (compared to the case where the polarities of the two data voltages are the same), thereby increasing the load degree of the sub-pixel (one color) connected to the data line and being of a high grayscale, so as to reduce the brightness difference between it and the sub-pixel (another color) which originally had a lower load degree, thereby improving color shift.

[0084] Figure 1 and Figure 2 This illustrates situations corresponding to abnormal images. The difference lies in the fact that the polarity distribution of multiple sub-pixels in the former and latter can be determined according to the second polarity inversion method and the first polarity inversion method, respectively. For example... Figure 2 Using sub-pixels as the smallest unit, the polarity of sub-pixels can be set to alternate between positive polarity "+" and negative polarity "-" in the row direction, and alternate between 4 positive polarity "+" and 4 negative polarity "-" in the column direction. Combined with the above-mentioned electrical connection method between multiple data lines 30 and multiple sub-pixels, the first polarity reversal method can achieve different polarities for multiple sub-pixels electrically connected to each data line 30.

[0085] like Figure 2 As shown, at this time, although the green sub-pixels G of all columns are still in an overloaded state (corresponding to...) Figure 2 (G heavy), but because the red sub-pixels R in each column of half the columns are still electrically connected to the corresponding data lines 30 (corresponding to the lower grayscale sub-pixels) in an alternating manner. Figure 1In the middle "R heavy"), the blue sub-pixels B in each column of half the columns are still electrically connected to the corresponding data lines 30 (corresponding to) interleaved with the low grayscale sub-pixels. Figure 1 The red sub-pixel R and blue sub-pixel B (corresponding to "B" in the middle) are electrically connected alternately to the same data line 30. Figure 2 In the "R / B light" pattern, half of the red sub-pixels R have the opposite polarity to the blue sub-pixels B in the previous row, hence the comparison... Figure 1 In contrast, the overload ratio of the red sub-pixel R has increased, thus reducing the purplish tint.

[0086] Therefore, while driving multiple sub-pixels to emit light using only the first polarity reversal method can improve color shift, a noticeable color shift still exists. Thus, in step S5, in addition to determining the polarity of multiple sub-pixels based on the first polarity reversal method, multiple initial grayscale values ​​are compensated according to the first overdrive compensation table to obtain corresponding first target grayscale values. This means that the initial grayscale values ​​of some or all sub-pixels are further compensated accordingly. The compensation value can be determined based on pre-tuning results to further improve the color shift problem.

[0087] like Figure 3 As shown, following S5 above, the following steps are also included:

[0088] S6, the brightness of the plurality of sub-pixels is controlled according to the polarity of each sub-pixel and the plurality of first target grayscale values ​​to display the display screen of the frame to be displayed.

[0089] Similarly, as discussed in S4 above, the polarity of each sub-pixel in each frame (including the frame to be displayed) can be determined according to the first polarity reversal method, and the first target grayscale value of some or all sub-pixels can be determined according to the first overdrive compensation table. Then, according to the polarity and the corresponding first target grayscale value, the corresponding data voltage is applied to the sub-pixel (pixel electrode in it), so that the corresponding liquid crystal molecules are deflected under the voltage difference between the data voltage and the common voltage. Similarly, the liquid crystal molecules corresponding to all sub-pixels can be deflected in the above manner, thereby displaying the display screen of the frame to be displayed.

[0090] It should be noted that if the display information of the frame to be displayed includes multiple abnormal image information, then the sub-pixels of different regions in the frame to be displayed, which correspond to different abnormal image information, can be compensated by using the corresponding first polarity reversal method and the corresponding first overdrive compensation table.

[0091] In some embodiments, such as Figure 5 As shown, S31 may include, but is not limited to, the following steps:

[0092] S311, according to the second polarity reversal method, the polarity of the two initial grayscale values ​​corresponding to at least n sub-pixels that are electrically connected to the same data line and are turned on in sequence is set to be the same.

[0093] Following S311 above, S51 may include, but is not limited to, the following steps:

[0094] S511, according to the first polarity reversal method, the polarity of the two initial grayscale values ​​corresponding to at least m sub-pixels that are electrically connected to the same data line and sequentially turned on is set to be the same, where m and n are both positive integers greater than 1, and m is less than n.

[0095] According to S31 and S51 above, the second polarity reversal method can be defined as setting the polarity of the two initial grayscale values ​​corresponding to at least two sub-pixels that are electrically connected to the same data line and turned on in sequence to be the same, and the first polarity reversal method can be defined as setting the polarity of the two initial grayscale values ​​corresponding to at least two sub-pixels that are electrically connected to the same data line and turned on in sequence to be different.

[0096] Furthermore, in this embodiment, the second polarity reversal method and the first polarity reversal method are defined as follows: the polarity of the two initial grayscale values ​​corresponding to at least n and m sub-pixels that are electrically connected to the same data line and turned on in sequence is set to be the same. That is, in this embodiment, for each frame of the image to be displayed, the same data line will output at least two data voltages with the same polarity. For the data line 30 that is electrically connected to multiple sub-pixels with high grayscale, at least two data voltages with the same polarity and similar amplitude can be output, so that the charging efficiency of the latter of the two corresponding sub-pixels is higher, which can improve the brightness of the displayed image. At the same time, since m is less than n, that is, the light load ratio of at least one color sub-pixel in the image generated by the first polarity reversal method and the second polarity reversal method is different, which can improve the color shift phenomenon under abnormal images.

[0097] In some embodiments, such as Figure 6 As shown, S3 may include, but is not limited to, the following steps:

[0098] S301, compensate multiple initial grayscale values ​​according to a second overdrive compensation table to obtain multiple corresponding second target grayscale values, wherein the second overdrive compensation table is different from the first overdrive compensation table;

[0099] Following S301 above, S6 may include, but is not limited to, the following steps:

[0100] S601, the brightness of the plurality of sub-pixels is controlled according to the polarity of each sub-pixel and the plurality of second target grayscale values ​​to display the display screen of the frame to be displayed.

[0101] Understandably, in this embodiment, when the information to be displayed is different from the abnormal information, while determining the polarity of each sub-pixel according to the second polarity reversal method, in order to improve the charging efficiency of the sub-pixel, multiple initial grayscale values ​​are compensated according to the second overdrive compensation table as described in S301 above to obtain multiple corresponding second target grayscale values. Then, as described in S601, the brightness of the sub-pixel is controlled according to the polarity of each sub-pixel and the corresponding second target grayscale value, thereby improving the brightness of the non-abnormal image.

[0102] In this context, it can be assumed that different non-abnormal frames (to be displayed) all correspond to the same second overdrive compensation table, meaning that the initial grayscale value of any non-abnormal frame (to be displayed) can be compensated using the same second overdrive compensation table. At least one of the first overdrive compensation table and the corresponding first polarity inversion method is different for two different abnormal frames (to be displayed).

[0103] It should be noted that the second overdrive compensation table here is different from the first overdrive compensation table. The second overdrive compensation table can be understood as a regular overdrive compensation table, which can be used for compensation of non-abnormal scenes. The first overdrive compensation table can be understood as an unconventional overdrive compensation table, which can be used for compensation of abnormal scenes.

[0104] In some embodiments, the first overdrive compensation table includes a plurality of first grayscale values, a plurality of second grayscale values, and a plurality of first compensation values, wherein each first grayscale value and each second grayscale value corresponds to a first compensation value; the second overdrive compensation table includes a plurality of first grayscale values, a plurality of second grayscale values, and a plurality of second compensation values, wherein each first grayscale value and each second grayscale value corresponds to a second compensation value; wherein at least one first compensation value is different from the corresponding second compensation value.

[0105] Specifically, the first overdrive compensation table and the second overdrive compensation table have corresponding first compensation value and second compensation value based on one of the first grayscale values ​​and one of the second grayscale values, respectively. That is, the difference between the first overdrive compensation table and the second overdrive compensation table is that the values ​​of the compensation values ​​are different. The two tables target the same number of first grayscale values ​​and the same number of second grayscale values.

[0106] Specifically, such as Figure 7 As shown, the step of "compensating multiple initial grayscale values ​​according to the first overdrive compensation table to obtain multiple corresponding first target grayscale values" in S5 may include, but is not limited to, the following steps and combinations thereof.

[0107] S501, based on the two initial grayscale values ​​corresponding to the two sub-pixels that are electrically connected to the same data line and are turned on sequentially, determine the first grayscale value and the corresponding second grayscale value in the first overdrive compensation table.

[0108] As discussed above, multiple gate signals output by multiple gate lines 20 control multiple rows of sub-pixels to turn on sequentially, and multiple data lines 30 output multiple data signals. During the initial period when each row of sub-pixels turns on, the potentials of the multiple data signals are the multiple data voltages of the multiple sub-pixels in that row. For the same data line 30, multiple data voltages of multiple sub-pixels electrically connected to it and subsequently turned on are output sequentially.

[0109] In this embodiment, the first grayscale value and the second grayscale value are defined as the two initial grayscale values ​​corresponding to the former and the latter of the two adjacent data voltages output sequentially from the same data line 30.

[0110] S502, determine the corresponding first compensation value based on the first grayscale value and the second grayscale value.

[0111] Understandably, each first compensation value in the first overdrive compensation table is set based on the two initial grayscale values ​​corresponding to the former and the latter of the two adjacent data voltages output sequentially from the same data line 30. In other words, the first compensation value is set according to the degree of difference between the two grayscale values.

[0112] S503, the initial grayscale value of the later-activated sub-pixel among the two sequentially activated sub-pixels is compensated according to the first compensation value to obtain the corresponding first target grayscale value.

[0113] The first compensation value can be understood as the compensation value applied to the second grayscale value. Among the two adjacent data voltages output sequentially from the same data line 30, the two initial grayscale values ​​corresponding to the former and the latter are respectively, and the initial grayscale value of the latter can be superimposed with the first compensation value to obtain the corresponding first target grayscale value.

[0114] It should be noted that for multiple rows of sub-pixels electrically connected to the same data line 30, the first target grayscale value of each sub-pixel, from the second row to the last row, can be determined in the first overdrive compensation table based on the initial grayscale value of the sub-pixel in the preceding row and its own grayscale value. If the "initial grayscale value of the sub-pixel in the preceding row" is different from the first grayscale value, and / or the "its own grayscale value" is different from the second grayscale value, the corresponding first target grayscale value can be determined by, for example, linear interpolation.

[0115] Similarly, the specific method of "compensating multiple initial grayscale values ​​according to the second overdrive compensation table to obtain multiple corresponding second target grayscale values" in S301 can also refer to the above-described method of obtaining multiple corresponding first target grayscale values ​​through S501 to S503.

[0116] In some embodiments, such as Figure 8 As shown, S301 may include, but is not limited to, the following steps:

[0117] S3011, multiple second target grayscale values ​​are compensated according to the second white balance compensation table to obtain multiple corresponding fourth target grayscale values, wherein the second white balance compensation table is different from the first white balance compensation table.

[0118] The goal of white balance is to correct white objects under different light sources to the white perceived by the human eye, ensuring no color cast in the image. Since white contains no chromaticity information, it has the best color rendering effect and is therefore selected as the reference color. It can be assumed that the display device included in the aforementioned display panel initially has the same compensation coefficients for the grayscale values ​​(e.g., the first target grayscale value or the second target grayscale value) of sub-pixels of different colors. However, the compensation coefficients of sub-pixels of different colors can be adjusted according to factors such as the color of the ambient light, so that the displayed image presented to the human eye (determined by the actual light emission of the display panel and the ambient light conditions) conforms to human visual perception.

[0119] When the information to be displayed is different from the information of the abnormal image, that is, when the frame to be displayed is a non-abnormal image, based on the polarity of multiple grayscale values ​​and the second target grayscale values ​​determined according to the second polarity reversal method and the second overdrive compensation table, this embodiment considers that the risk of color shift in non-abnormal images is inherently low. Therefore, multiple second target grayscale values ​​can be compensated by the second white balance compensation table to obtain multiple corresponding fourth target grayscale values, so as to further improve the white balance problem of the image.

[0120] Following S3011 above, S5 may include, but is not limited to, the following steps:

[0121] S5001, compensate multiple first target grayscale values ​​according to the first white balance compensation table to obtain multiple corresponding third target grayscale values.

[0122] It should be noted that when the information to be displayed is the same as the information of the abnormal image, that is, when the frame to be displayed is an abnormal image, in addition to the first polarity reversal method, it is necessary to combine the first overdrive compensation table to compensate multiple initial grayscale values ​​in order to better reduce the risk of color shift. If the first white balance compensation table is superimposed to compensate multiple first target grayscale values ​​at this time, it may reduce the compensation effect of the first overdrive compensation table on color shift. Therefore, white balance compensation can be turned off or not performed at this time.

[0123] Of course, during the debugging phase, for compensation of abnormal images, the specific compensation methods or values ​​of the first polarity reversal method, the first overdrive compensation table, and the first overdrive compensation table can be comprehensively considered. After multiple adjustments, the specific content of the above three compensation methods that can simultaneously improve color cast and white balance issues can be obtained. At this time, multiple first target grayscale values ​​can also be compensated according to the first white balance compensation table to obtain multiple corresponding third target grayscale values.

[0124] In some embodiments, S6 may include, but is not limited to, the following steps:

[0125] The first target data voltage is determined based on the grayscale voltage meter and each first target grayscale value, and the first target data voltage corresponding to the polarity of the sub-pixel is applied to the corresponding sub-pixel.

[0126] Specifically, the aforementioned information to be displayed may include the initial grayscale values ​​of all or some sub-pixels in the frame to be displayed. Through the above steps, multiple first target grayscale values ​​can be obtained. The grayscale voltage table may include multiple bound point grayscales and multiple bound point data voltages that correspond one-to-one. If the first target grayscale value is the same as a bound point grayscale, then its corresponding bound point data voltage can be used as the first target data voltage corresponding to the first target grayscale value. Otherwise, the corresponding first target data voltage can be determined by means including but not limited to linear interpolation.

[0127] Furthermore, multiple first target data voltages can be determined based on the grayscale voltmeter and multiple first target grayscale values, thereby generating multiple data signals that are transmitted to multiple data lines 30 respectively, to multiple columns of sub-pixels, and thus driving all sub-pixels to emit light.

[0128] The present invention also provides a display panel, comprising: a memory for storing instructions; and a controller for executing a driving method for the display panel as described above according to the instructions.

[0129] The controller includes: an on-chip system for compensating multiple initial grayscale values ​​according to a first overdrive compensation table to obtain multiple corresponding first target grayscale values; and a source driver for controlling the brightness of multiple sub-pixels according to the polarity of each sub-pixel and the multiple first target grayscale values.

[0130] Specifically, it can be assumed that after receiving the image information to be displayed, the on-chip system determines that the image to be displayed is an abnormal image. It compensates multiple initial grayscale values ​​according to the first overdrive compensation table to obtain multiple corresponding first target grayscale values, and transmits the transition image information containing multiple first target grayscale values ​​to the timing control chip. The timing control chip processes the transition image information to be displayed in conjunction with the clock signal, and transmits multiple first target grayscale values ​​to the source driver chip. The source driver can determine the first target data voltage and its polarity of the sub-pixel according to the grayscale voltage table and the first polarity reversal method, and then drive the corresponding liquid crystal molecules to deflect to the corresponding degree in the corresponding direction to cooperate with the backlight to display the image.

[0131] This invention provides a display panel and a driving method. When the information to be displayed is the same as the abnormal image information, the polarity of each sub-pixel is determined according to a first polarity reversal method, and a plurality of first target grayscale values ​​are obtained according to a first overdrive compensation table of a plurality of initial grayscale values. When the information to be displayed is different from the abnormal image information, the polarity of each sub-pixel is determined according to a second polarity reversal method. The first polarity reversal method is different from the second polarity reversal method. By making a differentiated setting for the polarity reversal method of the display panel under abnormal image conditions compared to the polarity reversal method under non-abnormal image conditions, and by superimposing the first overdrive compensation table to compensate the initial grayscale values, the color shift problem of the displayed image is effectively improved.

[0132] The display panel and driving method provided in the embodiments of the present invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the technical solutions and core ideas of the present invention. Those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A driving method for a display panel, characterized in that, Applied to a display panel, the display panel includes multiple data lines and multiple sub-pixels, each of the data lines being electrically connected to a corresponding plurality of the sub-pixels, including: Obtain abnormal image information and display image information of the frame to be displayed. The display image information includes multiple initial grayscale values ​​of multiple sub-pixels in the frame to be displayed. Each abnormal image has corresponding abnormal image information. Under the abnormal image, the jump between two adjacent data voltages transmitted on the same data line causes the abnormal image to show color shift. If the information to be displayed is the same as the abnormal information, then the polarity of each sub-pixel is determined according to the first polarity reversal method, and multiple initial grayscale values ​​are obtained according to the first overdrive compensation table to obtain multiple corresponding first target grayscale values. The brightness of the multiple sub-pixels is controlled according to the polarity of each sub-pixel and the multiple first target grayscale values ​​to display the image to be displayed of the frame to be displayed; If the information to be displayed is different from the abnormal information, the polarity of each sub-pixel is determined according to the second polarity reversal method, wherein the first polarity reversal method is different from the second polarity reversal method. The brightness of multiple sub-pixels is controlled according to the polarity of each sub-pixel to display the display screen of the frame to be displayed; The step of determining the polarity of each sub-pixel according to the first polarity reversal method includes: According to the first polarity reversal method, the polarity of the two initial grayscale values ​​corresponding to at least two sub-pixels that are electrically connected to the same data line and are turned on sequentially is set to be different. The step of determining the polarity of each sub-pixel according to the second polarity reversal method includes: According to the second polarity reversal method, the polarity of the two initial grayscale values ​​corresponding to at least two sub-pixels that are electrically connected to the same data line and are turned on sequentially is set to be the same.

2. The driving method for the display panel as described in claim 1, characterized in that, The step of determining the polarity of each sub-pixel according to the second polarity reversal method includes: Multiple initial grayscale values ​​are obtained according to a second overdrive compensation table to obtain multiple corresponding second target grayscale values, wherein the second overdrive compensation table is different from the first overdrive compensation table; The step of controlling the brightness of multiple sub-pixels according to the polarity of each sub-pixel to display the image to be displayed of the frame to be displayed includes: The brightness of the plurality of sub-pixels is controlled according to the polarity of each sub-pixel and the plurality of second target grayscale values ​​to display the image to be displayed of the frame to be displayed.

3. The driving method for the display panel as described in claim 2, characterized in that, The first overdrive compensation table includes multiple first grayscale values, multiple second grayscale values, and multiple first compensation values, with each first grayscale value and each second grayscale value corresponding to a first compensation value; The second overdrive compensation table includes multiple first grayscale values, multiple second grayscale values, and multiple second compensation values, with each first grayscale value and each second grayscale value corresponding to a second compensation value; Wherein, at least one of the first compensation values ​​is different from the corresponding second compensation value.

4. The driving method for the display panel as described in claim 3, characterized in that, The display panel also includes multiple data lines, each of which is electrically connected to a corresponding plurality of sub-pixels; The step of obtaining multiple first target grayscale values ​​based on multiple initial grayscale values ​​in a first overdrive compensation table includes: Based on the two initial grayscale values ​​corresponding to the two sub-pixels that are electrically connected to the same data line and are turned on sequentially, the first grayscale value and the corresponding second grayscale value in the first overdrive compensation table are determined. Based on the first compensation value corresponding to the first grayscale value and the second grayscale value; The initial grayscale value of the later-activated sub-pixel among the two sequentially activated sub-pixels is compensated according to the first compensation value to obtain the corresponding first target grayscale value.

5. The driving method for the display panel as described in claim 2, characterized in that, The steps of determining the polarity of each sub-pixel according to the first polarity reversal method, and obtaining the corresponding multiple first target grayscale values ​​according to the multiple initial grayscale values ​​in the first overdrive compensation table, include: Multiple first target grayscale values ​​are compensated according to the first white balance compensation table to obtain multiple corresponding third target grayscale values; The step of obtaining multiple second target grayscale values ​​based on multiple initial grayscale values ​​in the second overdrive compensation table includes: Multiple second target grayscale values ​​are compensated according to a second white balance compensation table to obtain multiple corresponding fourth target grayscale values. The second white balance compensation table is different from the first white balance compensation table.

6. The driving method for a display panel as described in claim 1, characterized in that, The step of setting the polarity of the two initial grayscale values ​​corresponding to at least two sub-pixels electrically connected to the same data line and sequentially turned on according to the first polarity reversal method includes: According to the first polarity reversal method, the polarity of the two initial grayscale values ​​corresponding to at least m sub-pixels that are electrically connected to the same data line and are turned on sequentially is set to be the same. The step of setting the polarity of the two initial grayscale values ​​corresponding to at least two sub-pixels electrically connected to the same data line and sequentially turned on according to the second polarity reversal method includes: According to the second polarity reversal method, the polarity of the two initial grayscale values ​​corresponding to at least n sub-pixels that are electrically connected to the same data line and sequentially turned on is set to be the same, where m and n are both positive integers greater than 1, and m is less than n.

7. The driving method for a display panel as described in claim 1, characterized in that, The step of controlling the brightness of multiple sub-pixels based on the polarity of each sub-pixel and multiple first target grayscale values ​​to display the image to be displayed of the frame to be displayed includes: The first target data voltage is determined based on the grayscale voltage meter and each first target grayscale value, and the first target data voltage corresponding to the polarity of the sub-pixel is applied to the corresponding sub-pixel.

8. A display panel, characterized in that, include: Memory, used to store instructions; A controller for executing the driving method of the display panel as described in any one of claims 1 to 7 according to the instructions.

9. The display panel as described in claim 8, characterized in that, The controller includes: The on-chip system is used to obtain a plurality of corresponding first target grayscale values ​​based on a plurality of initial grayscale values ​​in a first overdrive compensation table; A source driver is used to control the brightness of a plurality of sub-pixels based on the polarity of each sub-pixel and a plurality of first target grayscale values.

Images