Display driving device, display driving method and display panel

Abstract

The present application belongs to the field of display driving technology, and specifically relates to a display driving device, a display driving method and a display panel. The display driving device includes a picture detection module and a display driving module; the picture detection module is used to determine whether the next frame of the display picture is a special picture, and when it is detected that it is not a special picture, the scan line is driven in a row-by-row opening manner, so as not to affect the display effect of the normal picture; when it is detected that it is a special picture, the first group of display driving signals output by the display driving module is used to control the data voltage change in the scanning line switching process within a target threshold, so that no coupling is caused to the common voltage, so that the common voltage does not shift, thereby solving the problem of color cast or crosstalk in the entire picture caused by the common voltage shift, and improving the display effect of the picture.

Description

Technical Field

[0001] The present disclosure belongs to the field of display driving technology, and in particular relates to a display driving device, a display driving method and a display panel. Background Art

[0002] In the common Z-architecture pixel arrangement of the display panel, during the row scanning switching process of displaying a special picture (a special picture refers to a picture displayed in the entire display area or a part of the display area where two adjacent columns are alternating between light and dark), the data voltage is also switched from the previous row to the current row. Due to the coupling between the common electrode and the data line, the common voltage of the current row is biased upward or downward as a whole, and the display of each row will have color cast, which will cause color cast or crosstalk problems in the entire picture.

[0003] It can be seen that in the prior art, when displaying special images, there is a problem of color cast or crosstalk caused by common voltage offset. Summary of the invention

[0004] The present application provides a display driving device, a display driving method and a display panel to solve the problem of color cast or crosstalk of the picture caused by common voltage offset.

[0005] In a first aspect, the present application provides a display driving device, which is applied to a display panel including N scan lines, and the driving device includes: a picture detection module, which is used to output a first control signal when detecting that the next frame display picture is a target picture, and is used to output a second control signal when detecting that the next frame display picture is a normal picture; a display driving module, wherein the input end of the display driving module is connected to the output end of the picture detection module, and is used to output a first group of display driving signals when receiving the first control signal, so that the first group of display driving signals controls the data voltage change amount during the scanning line switching process to be less than or equal to the target threshold value; the display driving module is also used to output a second group of display driving signals when receiving the second control signal, so that the second group of display driving signals controls the N scan lines to be opened row by row.

[0006] Optionally, the first group of display driving signals controls the odd-numbered scan lines to be turned on row by row and the even-numbered scan lines to be turned off row by row, or the first group of display driving signals controls the even-numbered scan lines to be turned on row by row and the odd-numbered scan lines to be turned off row by row.

[0007] Optionally, when the display driving module is a level converter or a timing controller, the output end of the display driving module is connected to a clock signal receiving end of a GOA circuit of the display panel, and the first group of display driving signals and the second group of display driving signals are respectively N clock signals;

[0008] Alternatively, when the display driving module is a GOA circuit, the output end of the display driving module is electrically connected to the N scan lines, and the first group of display driving signals and the second group of display driving signals are respectively N gate driving signals.

[0009] Optionally, when the picture detection module detects that all of the M consecutive displayed pictures are target pictures, when displaying the 2m-1th frame of the target picture, the first group of display driving signals output by the display driving module controls the even-numbered scan lines to be opened row by row and the odd-numbered scan lines to be closed; when displaying the 2mth frame of the target picture, the first group of display driving signals output by the display driving module controls the odd-numbered scan lines to be opened row by row and the even-numbered scan lines to be closed;

[0010] Or, when displaying the 2m-1th frame target picture, the first group of display driving signals output by the display driving module controls the odd-numbered scan lines to be turned on row by row and the even-numbered scan lines to be turned off; when displaying the 2mth frame target picture, the first group of display driving signals output by the display driving module controls the even-numbered scan lines to be turned on row by row and the odd-numbered scan lines to be turned off;

[0011] Where m = [1, ..., X], and when M is an even number When M is an odd number

[0012]

[0013] Optionally, when the picture detection module detects that all consecutive M frames of displayed pictures are target pictures, when the target pictures are continuously displayed, the first group of display driving signals output by the display driving module controls the even-numbered scan lines to be opened row by row and the odd-numbered scan lines to be closed; when the target pictures are continuously displayed after Y1 frames of target pictures are continuously displayed, the first group of display driving signals output by the display driving module controls the odd-numbered scan lines to be opened row by row and the even-numbered scan lines to be closed; wherein, Y1+Y2≤M.

[0014] Optionally, the first group of display driving signals controls the 2a-1 scan line to be turned on for a first preset time and then the 2a scan line is turned on, and the 2a-1 scan line and the 2a scan line are turned off at the same time; then the 2a scan line is turned on for a second preset time while the 2a+1 scan line is turned on; wherein a=[1, ..., B], and when N is an even number When N is an odd number

[0015]

[0016] Or, the first group of display driving signals controls the 2a row scan line to be turned on for a first preset time and then starts to turn on the 2a+1 row scan line, and the 2a row scan line and the 2a+1 row scan line are turned off at the same time; then, when the 2a+2 row scan line is turned on, the 2a+1 row scan line is turned on for a second preset time, wherein a=[1, ..., B], and when N is an even number When N is an odd number

[0017] Optionally, the picture detection module includes: a picture cutting unit, the input end of the picture cutting unit is connected to the output end of the next frame display picture, and is used to cut the next frame display picture into multiple basic detection units according to a preset cutting standard; a grayscale judgment unit, the input end of the grayscale judgment unit is connected to the output end of the picture cutting unit, and is used to perform grayscale judgment on each basic detection unit, and when the basic detection unit meets the preset grayscale condition, a target signal is output; a counting unit, the input end of the counting unit is connected to the output end of the grayscale judgment unit, and the output end of the counting unit serves as the output end of the picture detection module, and is used to count all target signals to obtain the cumulative value corresponding to the next frame display picture, if the cumulative value is greater than or equal to the preset value, it indicates that the next frame display picture is the target picture, and a first control signal is output; if the cumulative value is less than the preset value, it indicates that the next frame display picture is a normal picture, and a second control signal is output.

[0018] In a second aspect, the present application provides a display driving method, which includes: detecting whether the next frame display picture is a target picture, outputting a first control signal when it is detected that the next frame display picture is the target picture, and outputting a second control signal when it is detected that the next frame display picture is a normal picture; when the first control signal is received, outputting a first group of display driving signals, so that the first group of display driving signals controls the data voltage change amount during the scanning line switching process to be less than or equal to the target threshold; when the second control signal is received, outputting a second group of display driving signals, so that the second group of display driving signals controls the N scanning lines to be opened row by row.

[0019] In a third aspect, the present application provides a display panel, comprising the above-mentioned display driving device and N scan lines, wherein an output end of a display driving module in the display driving device is connected to the N scan lines;

[0020] The present application also provides a display panel, comprising the above-mentioned display driving device, N scan lines and a GOA circuit, wherein the output end of the display driving module in the display driving device is connected to the clock signal receiving end of the GOA circuit, and the gate driving signal output end of the GOA circuit is connected to the N scan lines.

[0021] Optionally, the display panel further comprises a plurality of sub-pixels arranged in an array, a plurality of data lines connecting the sub-pixels and a plurality of array control modules; wherein each scan line is connected to at least one row of the sub-pixels; every two data lines share a data voltage, each column of sub-pixels is connected to two data lines, and each data line is only connected to one column of the sub-pixels, and two adjacent sub-pixels in the same column of sub-pixels are connected to different data lines; each array control module comprises a first switch unit and a second switch unit, a control end of the first switch unit and a control end of the second switch unit are connected to an output end of a display driving module in the display driving device, a first end of the first switch unit and a first end of the second switch unit are respectively connected to a data voltage output end, a second end of the first switch unit is connected to a data line sharing the same data voltage, and a second end of the second switch unit is connected to another data line sharing the same data voltage; wherein the display driving module is used to control the first switch unit and the second switch unit to be turned on in time-sharing manner.

[0022] The technical solution provided by this application has at least the following beneficial effects:

[0023] The present application determines whether the next frame of the displayed picture is a special picture through the picture detection module. When it is detected that it is not a special picture, the scan line is driven by opening it row by row, so as not to affect the display effect of the normal picture; when it is detected that it is a special picture, the first group of display drive signals output by the display drive module will control the data voltage change in the scan line switching process within the target threshold, so as not to cause coupling to the common voltage, so that the common voltage will not be offset, thereby solving the problem of color cast or crosstalk in the entire picture caused by the common voltage offset, and improving the display effect of the picture. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings herein are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the specification are used to explain the principles of the present disclosure. Obviously, the accompanying drawings described below are only some embodiments of the present disclosure, and for ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0025] Figure 1 The figure shows a schematic diagram of a special screen display under the Z architecture.

[0026] Figure 2 Shown is a schematic diagram of the offset of the common voltage.

[0027] Figure 3 Shown is a schematic diagram of the coupling direction of a common voltage provided in an embodiment of the present application.

[0028] Figure 4Shown is a schematic structural diagram of a display driving device provided in an embodiment of the present application.

[0029] Figure 5 FIG. 1 is a waveform diagram of a second group of display driving signals provided in an embodiment of the present application.

[0030] Figure 6 FIG. 1 is a schematic diagram showing a waveform of a second set of display driving signals provided in an embodiment of the present application and applied to a special display screen.

[0031] Figure 7 FIG. 1 is a schematic diagram showing a waveform of a second set of display driving signals provided in an embodiment of the present application and applied in a special screen.

[0032] Figure 8 FIG. 1 is a schematic diagram showing another waveform of a second set of display driving signals provided in an embodiment of the present application, which is applied in a special picture.

[0033] Fig. 9 Shown is a schematic structural diagram of another display driving device provided in an embodiment of the present application.

[0034] Fig.10 The figure shows a display screen switching schematic diagram provided in an embodiment of the present application.

[0035] Fig.11 Shown is another display screen switching schematic diagram provided in an embodiment of the present application.

[0036] Fig.12 Shown is another display screen switching schematic diagram provided in an embodiment of the present application.

[0037] Fig.13 The figure shows a waveform comparison diagram of row-by-row opening and odd-even staggered charging provided by an embodiment of the present application.

[0038] Fig.14 FIG. 4 is a schematic diagram of the structure of a picture detection module provided in an embodiment of the present application.

[0039] Fig.15 The figure is a flow chart of a display driving method provided in an embodiment of the present application.

[0040] Fig.16 FIG. 1 is a schematic diagram showing the connection between an array control module and two data lines provided in an embodiment of the present application. DETAILED DESCRIPTION

[0041] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this application will be more comprehensive and complete and fully convey the concept of the example embodiments to those skilled in the art.

[0042] In addition, described feature, structure or characteristic can be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present application. However, those skilled in the art will appreciate that the technical scheme of the present application can be put into practice without one or more of the specific details, or other methods, components, devices, steps, etc. can be adopted. In other cases, known methods, devices, realizations or operations are not shown or described in detail to avoid blurring the various aspects of the application.

[0043] The present application is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the technical features involved in the various embodiments of the present application described below can be combined with each other as long as they do not conflict with each other. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be understood as limiting the present application.

[0044] The common Z-frame pixel arrangement of display panels is as follows Figure 1 As shown, two adjacent columns of sub-pixels are alternately connected on one data line, that is, the even-numbered rows of sub-pixels in the first column of sub-pixels and the odd-numbered rows of sub-pixels in the second column of sub-pixels are respectively connected to the same data line; for example: Figure 1 Taking the data line S2 in FIG. 1 as an example, S2 is connected to the red sub-pixels in the even-numbered rows on the left and the green sub-pixels in the odd-numbered rows on the right.

[0045] The special screens displayed under the Flip_z architecture are as follows Figure 1 As shown, the entire column of sub-pixels in the display area is arranged according to the rule of bright-dark-bright-dark; wherein, the entire column of sub-pixels in the display area is arranged according to the rule of dark-bright-dark-bright, which also belongs to a special picture; in addition, Figure 1 The white part of the sub-pixel represents light, and the gray part represents dark; the polarity of the data line is dot inversion, that is, the previous line is -+-+-+, and the corresponding next line is +-+-+-; when the data voltage of the sub-pixel is higher than the common voltage, the polarity is called "+", and when the data voltage of the sub-pixel is lower than the common voltage, the polarity is called "-", for example, "R-" means that the polarity of the red sub-pixel in the screen is -.

[0046] In this application, the grayscale of the sub-pixel is "+127" and "-127" as bright, and the grayscale of "0" as dark; Figure 1For example, when scanning the second row of scan lines, the data voltage is also switched from the first row to the second row: for the first R pixel, the data voltage jumps from 0 grayscale in the first row to 127 grayscale in the second row. At this time, the data voltage will produce an upward coupling to the common voltage; for the second G pixel, the data voltage jumps from -127 grayscale to 0 grayscale, which will also produce an upward coupling to the common voltage; for the third B pixel, the data voltage jumps from 0 grayscale to 127 grayscale, which will produce an upward coupling to the common voltage. By analogy, it can be seen that when the entire second row of sub-pixels is displayed, the common voltage will be coupled upward as a whole, such as Figure 2 As shown in FIG. 1 , the common voltage of this row is biased upward, and color cast will appear in the viewing angle. Similarly, it can be deduced that the common voltage of the third row is biased downward, and the common voltage of the fourth row is biased upward, and so on; therefore, color cast will appear in the display of each row in the special picture.

[0047] In order to solve the above problem, the present application proposes a polarity change method, that is, when it is detected that the next frame display picture is a special picture, the original data voltage polarity is converted from -+-+-+ of the first row to -++-++-++. Still taking the second row as an example, Figure 3 As shown in the figure, the arrows in the figure are the coupling directions of the common voltage, and the arrows in the wireframe are arranged in a way of two up and two down, so that the coupling to the common voltage is balanced and the common voltage will not be offset. Therefore, the display of the second row will not have color cast. Similarly, it can be seen that the arrows in the third row are also two up and two down, which can also balance the impact on the common voltage.

[0048] Furthermore, in order to solve the above-mentioned problem of color cast or crosstalk caused by common voltage offset when displaying special images, the present application also provides a display driving device, which is applied to a display panel including N scanning lines, such as Figure 4 and Fig. 9 As shown, the display driving device 100 includes: an image detection module 110 and a display driving module 120 .

[0049] The image detection module 110 is used to output a first control signal when detecting that the next frame of displayed image is a target frame, and is used to output a second control signal when detecting that the next frame of displayed image is a normal frame.

[0050] The input end of the display driving module 120 is connected to the output end of the picture detection module 110, and is used to output a first group of display driving signals when receiving a first control signal, so that the first group of display driving signals controls the data voltage change amount in the process of scanning line switching to be less than or equal to the target threshold value; the display driving module 120 is also used to output a second group of display driving signals when receiving a second control signal, so that the second group of display driving signals controls N scanning lines to be opened row by row.

[0051] It should be noted that the target picture in this embodiment is the special picture shown in the above background technology, that is, the picture displayed in the entire display area or part of the display area is arranged in a regular pattern of bright-dark-bright-dark or dark-bright-dark-bright.

[0052] The picture detection module 110 in this embodiment obtains the data of the next frame of the display picture from the display picture memory, and detects the display data to determine whether the picture to be displayed in the next frame is the target picture; when the next frame of the display picture is the target picture, the Vin1 signal output by the output end of the picture detection module 110 is the first control signal, and when the next frame of the display picture is the normal picture, the Vin1 signal output by the output end of the picture detection module 110 is the second control signal; wherein, the first control signal can be a high-level signal, otherwise the second control signal is a low-level signal; the first control signal can also be a low-level signal, otherwise the second control signal is a high-level signal; in addition, when it is detected that it is not the target picture, the picture is determined to be a normal picture.

[0053] The display driving module in this embodiment outputs a second group of display driving signals to open N scan lines row by row when receiving the second control signal output by the picture detection module, so that the normal picture can be driven normally; the display driving module outputs a second group of display driving signals when receiving the first control signal output by the picture detection module, and the second group of display driving signals can make the data voltage change on the data line less than or equal to the target threshold value during the scanning line switching process. When the target threshold value is set to a value that does not cause coupling to the common voltage, the common voltage will not be offset when the row scanning is switched when displaying a special picture, thereby solving the problem of color cast or crosstalk in the entire picture caused by the common voltage offset, and improving the display effect of the picture.

[0054] In one embodiment, the first group of display driving signals controls the odd-numbered scan lines to be turned on row by row and the even-numbered scan lines to be turned off, or the first group of display driving signals controls the even-numbered scan lines to be turned on row by row and the odd-numbered scan lines to be turned off; therefore, when the scan lines are turned on row by row, the data voltage on the same data line does not change in grayscale and polarity, and thus does not cause coupling to the common voltage.

[0055] It should be noted that the display driver module may be a level converter or a timing controller that outputs N clock signals; Figure 4In the figure, CLK1~CLK5 are clock signals output by the display driver module, and Gate1~Gate5 are gate drive signals output by the GOA circuit 200; wherein the GOA circuit 300 includes N output terminals, which are electrically connected to the N scan lines of the display panel respectively, and the N gate drive signals are used to drive the opening and closing of the N scan lines; the GOA circuit 300 generates N gate drive signals according to the N clock signals output by the display driver module 120, that is, Gate1 is generated according to CLK1, Gate2 is generated according to CLK2, and so on, and GateN is generated according to CKN.

[0056] When the image detection module detects that the next frame of the display image is a normal image, the second group of display driving signals output by the display driving module is as follows: Figure 5 As shown, the GOA circuit controls N scanning lines to be opened row by row according to the N gate driving signals generated by the second group of display driving signals; however, Figure 5 When the waveform in the figure is applied to a special screen, problems in the background technology will occur, such as Figure 6 As shown, the scan lines are turned on line by line, and the data lines provide data line by line. When displaying the 2nd, 4th, 6th and other even-numbered lines, the common voltage is coupled upward, and the common voltage of the 3rd, 5th, 7th and other odd-numbered lines is coupled downward, resulting in a color cast problem.

[0057] Therefore, in order to solve the color cast problem when displaying a special frame, when the frame detection module detects that the next frame to be displayed is a special frame, the display driving module outputs a first set of display driving signals different from the second set of display driving signals.

[0058] In one embodiment, if Figure 7 As shown, the first group of display drive signals only includes drive signals for turning on odd rows row by row, and no drive signals are output for all even rows, so that the GOA circuit controls the odd scan lines of the display panel to turn on row by row according to the N gate drive signals generated by the first group of display drive signals, and all even rows are turned off; taking the data line S2 as an example, the first row is a positive polarity 0 grayscale, the third row is also a positive polarity 0 grayscale, and the fifth row is also a positive polarity 0 grayscale. At this time, the data voltage jumping from the first row to the third row has no change in grayscale and polarity, and will not cause coupling to the common voltage, so the entire screen will not have crosstalk or color cast. Here, the target threshold in this embodiment is 0.

[0059] In one embodiment, if Figure 8As shown, the first group of display drive signals only includes drive signals for turning on the even rows row by row, and no drive signals are output for all odd rows, so that the GOA circuit controls the even-numbered scan lines of the display panel to turn on row by row according to the N gate drive signals generated by the first group of display drive signals, while all odd-numbered rows are turned off; taking the data line S2 as an example, the second row is 127 grayscales with positive polarity, and the fourth row is also 127 grayscales with positive polarity. At this time, the data voltage jumping from the second row to the fourth row has no change in grayscale and polarity, and will not cause coupling to the common voltage, so the entire picture will not have crosstalk or color cast.

[0060] It can be seen that in this embodiment, the image detection module is used to determine whether the next frame of the displayed image is a special image. When it is detected that it is not a special image, the scan lines are driven by opening them row by row, so as not to affect the display effect of the normal image. When it is detected that it is a special image, the display driving module is used to control the odd-numbered scan lines to be opened row by row and the even-numbered scan lines to be closed, or the even-numbered scan lines to be opened row by row and the odd-numbered scan lines to be closed. When the scan lines are opened row by row, the data voltage on the same data line does not change in grayscale and polarity, so it will not cause coupling to the common voltage, and will not cause the common voltage to be offset, thereby solving the problem of color cast or crosstalk in the entire image caused by the common voltage offset, and improving the display effect of the image.

[0061] In one embodiment, the display driving module 120 may be a GOA circuit that outputs N gate driving signals; Fig. 9 As shown, Gate1~Gate5 are gate drive signals output by the display driver module 120; wherein the display driver module 120 includes N output terminals, which are electrically connected to N scan lines of the display panel respectively, and the N gate drive signals are used to drive the opening and closing of the N scan lines; in this embodiment, the second group of display drive signals output by the display driver module 120 can be generated according to the clock signal output by the level converter or the clock controller, or can be generated by the display driver module 120 itself.

[0062] It should be noted that Figure 4 and Fig. 9 The difference lies in the different types of display drive signals output by the display drive device. Figure 4 The output is the clock signal, and Fig. 9 The gate drive signals output by the two types of display drive signals have the same purpose: when the first group of display drive signals is output, the odd-numbered scan lines are controlled to be turned on row by row and the even-numbered scan lines are turned off, or the even-numbered scan lines are controlled to be turned on row by row and the odd-numbered scan lines are turned off; when the second group of display drive signals is output, all scan lines are controlled to be turned on row by row. Therefore, Fig. 9 The working principle of the display driver module is Figure 4The same, no longer repeat here.

[0063] It is worth noting that if after displaying a normal picture, multiple frames are displayed as special pictures, Figure 7 or Figure 8 If the image is not displayed, the displayed image becomes rough, which makes the human eye feel poor. In order to solve this problem, this embodiment proposes a time mixing color display method, which specifically includes the following embodiments:

[0064] In one embodiment, when the picture detection module detects that M consecutive display frames are all target frames, when displaying the 2m-1th frame target frame, the first group of display driving signals output by the display driving module controls the even-numbered scan lines to be opened row by row and the odd-numbered scan lines to be closed; when displaying the 2mth frame target frame, the first group of display driving signals output by the display driving module controls the odd-numbered scan lines to be opened row by row and the even-numbered scan lines to be closed.

[0065] In another embodiment, when the picture detection module detects that M consecutive display frames are all target frames, when displaying the 2m-1th frame target frame, the first group of display driving signals output by the display driving module controls the odd-numbered scan lines to be opened row by row and the even-numbered scan lines to be closed; when displaying the 2mth frame target frame, the first group of display driving signals output by the display driving module controls the even-numbered scan lines to be opened row by row and the odd-numbered scan lines to be closed.

[0066] Wherein, m=[1, ..., X] in the above two embodiments, and when M is an even number When M is an odd number That is, the target picture of the 2m-1th frame is the odd-numbered frame target picture, and the target picture of the 2mth frame is the even-numbered frame target picture; that is, when it is detected that the continuous M frames of display pictures are all target pictures, only the odd-numbered scan lines and only the even-numbered scan lines are turned on in each frame of display picture, and the final display effect of the picture is as follows Fig.10 Shown and Fig.11 shown.

[0067] It should be noted that due to Fig.10 and Fig.11 Only half of the scan lines are opened, so the scan time of one frame is only half of the normal picture, which is equivalent to doubling the refresh rate. For example, if the original refresh rate is 60Hz, the scan time of one frame is 16.6ms, which is equivalent to the time to open all the scan lines in one frame. If only half of the scan lines are opened, the time is shortened to 8.8ms, and the refresh rate is doubled to 120Hz. 1S refresh 120frame, with Fig.10Taking the second line in the example, it is manifested as a rapid alternation of light and dark in the rapid switching of odd and even images. When the refresh rate is high, due to the residual vision of the human eye, the sense of perception is also bright, thereby reducing the roughness of the entire picture and improving the display effect of the panel.

[0068] In another embodiment of the present application, when the picture detection module detects that M consecutive displayed frames are all target frames, when the target frames are continuously displayed, the first group of display drive signals output by the display driving module controls the even-numbered scan lines to be opened row by row and the odd-numbered scan lines to be closed, and when Y2 target frames are continuously displayed after Y1 target frames are continuously displayed, the first group of display drive signals output by the display driving module controls the odd-numbered scan lines to be opened row by row and the even-numbered scan lines to be closed; wherein, Y1+Y2≤M.

[0069] It should be noted that the above embodiment is to open only the odd-numbered scan lines and only the even-numbered scan lines in each frame of display image, and the present embodiment is to open only the odd-numbered scan lines and only the even-numbered scan lines in a plurality of consecutive frames of display image, and to switch them in turn. Fig.12 As shown, after only the even-numbered scan lines are turned on for the display of consecutive Y1 frames, only the odd-numbered scan lines are turned on for the display of consecutive Y2 frames, and then only the even-numbered scan lines are turned on for the display of consecutive Y1 frames, and so on, until the display of M frames is completed; wherein, Y1 and Y2 can be equal, for example, they can be any number such as 4, 5, 8, 10, 60, etc.; Y1 and Y2 can also be different, for example, Y1 can be 4, and Y2 can be 8; therefore, the values ​​of Y1 and Y2 can be adjusted according to the actual situation, as long as Y1+Y2 is less than or equal to M.

[0070] In order to solve the problems of color cast and roughness of the picture, the present application also proposes a display method of odd-even mischarging, which specifically includes the following embodiments:

[0071] In one embodiment, the first group of display driving signals controls the 2a-1 scan line to be turned on for a first preset time and then the 2a scan line is turned on, and the 2a-1 scan line and the 2a scan line are turned off at the same time; then the 2a scan line is turned on for a second preset time while the 2a+1 scan line is turned on; wherein a=[1, ..., B], and when N is an even number When N is an odd number

[0072]

[0073] like Fig.13As shown, when the first row of scan line G1 is turned on for the first preset time, the second row of scan line G2 begins to turn on. At this time, the data voltage of the first row of scan line G1 will be charged to the second row of scan line G2. After charging for a period of time, the first row of scan line G1 and the second row of scan line G2 are turned off at the same time. Then the third row of scan line G3 is turned on, and at the same time as the third row of scan line G3 is turned on, the second row of scan line G2 is turned on again for charging. The charged data voltage is the data of the third row of scan line G3, and the charging time is the second preset time; wherein, the first preset time can be half of the total time the first row of scan line is turned on, and the second preset time can be half of the total time the third row of scan line is turned on. Therefore, the display of the second row of scan line G2 is a mixed color of the first row of scan line G1 and the third row of scan line G3, compared to the Figure 7 For example, if the second scanning line G2 is black, the whole picture will be smoother and the rough feeling will be reduced. In addition, when the second scanning line G2 is turned on, the data voltage is either the same as the data voltage of the first scanning line G1 or the same as the data voltage of the third scanning line G3, so there is no jump of the data voltage, so that the common voltage will not be offset, and the problem of color cast of the picture is solved.

[0074] In another embodiment, the first group of display driving signals controls the 2a row scan line to be turned on for a first preset time and then starts to turn on the 2a+1 row scan line, and the 2a row scan line and the 2a+1 row scan line are turned off at the same time; then, when the 2a+2 row scan line is turned on, the 2a+1 row scan line is turned on for a second preset time, wherein a=[1, ..., B], and when N is an even number When N is an odd number It should be noted that Fig.13 The method of staggered charging of the middle even row by two adjacent odd rows is given. The present embodiment is a method of staggered charging of the middle odd row by two adjacent even rows. The principle is the same as Fig.13 The same, no longer repeat here.

[0075] In one embodiment of the present application, Fig.14As shown, the picture detection module 110 includes: a picture cutting unit 111, a grayscale determination unit 112 and a counting unit 113; the input end of the picture cutting unit 111 is connected to the output end of the next frame display picture, and is used to cut the next frame display picture into multiple basic detection units according to a preset cutting standard; the input end of the grayscale determination unit 112 is connected to the output end of the picture cutting unit 111, and is used to perform grayscale determination on each basic detection unit, and when the basic detection unit meets the preset grayscale condition, a target signal is output; the input end of the counting unit 113 is connected to the output end of the grayscale determination unit 112, and the output end of the counting unit 113 is used as the first output end of the picture detection module 110, and is used to count all target signals to obtain the cumulative value corresponding to the next frame display picture, if the cumulative value is greater than or equal to the preset value, it indicates that the next frame display picture is the target picture, and then a first control signal is output; if the cumulative value is less than the preset value, it indicates that the next frame display picture is a normal picture, and then a second control signal is output.

[0076] It should be noted that Fig.14 The Input Data is the pixel data of the next frame of display screen. Since the pixel size of a frame of display screen is very large, in order to quickly and accurately determine whether the next frame of display screen is a special screen, the next frame of display screen is cut according to the pixel size of the preset basic detection unit through the screen cutting unit 111, that is, a frame of display screen is cut into multiple basic detection units. If the sub-pixel size of the basic detection unit is set to 50*50, the preset cutting standard is to cut the next frame of display screen in the manner of 50 sub-pixels horizontally and 50 sub-pixels vertically in sequence, so that multiple basic detection units can be obtained.

[0077] In the present embodiment, the preset grayscale condition includes the grayscale ranges corresponding to the brightness and darkness of the sub-pixels, and the brightness and darkness arrangement rule of the sub-pixels; for example, the grayscale value less than 30 is regarded as dark, and the grayscale value greater than 50 is regarded as bright, and the brightness and darkness arrangement rule is that the sub-pixels in two adjacent columns are arranged alternately as bright and dark; when the grayscale determination unit 112 determines that a basic detection unit meets the preset grayscale condition set above, a target signal is output, and if the basic detection unit does not meet the preset grayscale condition set above, no target signal is output; then, all the received target signals are counted by the calculation unit, and when the cumulative number of all the target signals is greater than or equal to the preset value, it indicates that the next frame display picture is a special picture, and the first control signal is output; if the cumulative value is less than the preset value, it indicates that the next frame display picture is a normal picture, and the second control signal is output.

[0078] Therefore, the picture detection module 110 composed of the picture cutting unit 111 , the grayscale determination unit 112 and the counting unit 113 can quickly and accurately determine whether the next displayed picture frame is a special picture.

[0079] This embodiment provides a display driving method, which is applied to the display driving device of the above embodiment. Fig.15 As shown, the driving method specifically includes the following steps:

[0080] Step S100 , detecting whether the next frame of displayed picture is a target picture, outputting a first control signal when it is detected that the next frame of displayed picture is the target picture, and outputting a second control signal when it is detected that the next frame of displayed picture is a normal picture.

[0081] Step S200: when a first control signal is received, a first group of display drive signals is output, so that the data voltage change amount in the process of controlling the scanning line switching by the first group of display drive signals is less than or equal to a target threshold value; when a second control signal is received, a second group of display drive signals is output, so that the second group of display drive signals controls N scanning lines to be opened row by row.

[0082] It should be noted that this embodiment first determines whether the next frame display screen is a special screen. When it is detected that it is not a special screen, the scan line is driven in a row-by-row manner, so as not to affect the display effect of the normal screen; when it is detected that it is a special screen, the data voltage change in the scan line switching process is controlled within the target threshold, so as not to cause coupling to the common voltage, so that the common voltage is not offset, thereby solving the problem of color cast or crosstalk in the entire screen caused by the common voltage offset, and improving the display effect of the screen.

[0083] In one embodiment, the present application provides a display panel, including the display driving device of the above embodiment and N scan lines, wherein the output end of the display driving module in the display driving device is connected to the N scan lines.

[0084] In another embodiment, the present application provides a display panel, including the display driving device of the above embodiment, N scan lines and a GOA circuit, the output end of the display driving module in the display driving device is connected to the clock signal receiving end of the GOA circuit, and the gate driving signal output end of the GOA circuit is connected to the N scan lines.

[0085] In yet another embodiment, the present application provides a display panel, including the display driving device of the above embodiment, N scan lines, a plurality of sub-pixels arranged in an array, a plurality of data lines connecting the sub-pixels, and a plurality of array control modules.

[0086] In this embodiment, each scan line is connected to at least one row of sub-pixels; every two data lines share a data voltage, each column of sub-pixels is connected to two data lines, and each data line is only connected to one column of sub-pixels, and two adjacent sub-pixels in the same column of sub-pixels are connected to different data lines;

[0087] like Fig.16 As shown, each array control module includes a first switch unit Q1 and a second switch unit Q2, a control end of the first switch unit Q1 and a control end of the second switch unit Q2 are connected to an output end of a display driving module in a display driving device, a first end of the first switch unit Q1 and a first end of the second switch unit Q2 are respectively connected to a data voltage output end, a second end of the first switch unit Q1 is connected to a data line S1 sharing the same data voltage, and a second end of the second switch unit Q2 is connected to another data line S2 sharing the same data voltage; the display driving module is used to control the first switch unit Q1 and the second switch unit Q2 to be turned on in a time-sharing manner.

[0088] It should be noted that if Fig.16 As shown, this embodiment divides each data line in the related art into two, and adds two switch units Q1 and Q2 for switching; wherein Q1 controls the sub-pixels of the even-numbered rows, and Q2 controls the sub-pixels of the odd-numbered rows; the display driving module controls Q1 and Q2 to be turned on in turn; Fig.16 As shown, the sub-pixels in the left half are bright, and the sub-pixels in the right half are dark; for the data voltage in the left half, it jumps from G2 to G4, the grayscale changes from 127 to 127, and the grayscale and polarity do not change, so there is no coupling to the common voltage; for the data voltage in the right half, it jumps from G1 to G3, the grayscale changes from 0 to 0, and the grayscale and polarity do not change, and there is no coupling from the common voltage; therefore, there will be no color cast problem when displaying special pictures.

[0089] In addition, the terms "first", "second", "third", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", "third" may explicitly or implicitly include one or more of the feature. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0090] In the description of this specification, the description with reference to the terms "some embodiments", "exemplarily", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0091] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application. Therefore, any changes or modifications made in accordance with the claims and description of the present application should fall within the scope of the patent of this application.

Claims

1. A display driving device, characterized in that: Applicable to a display panel including N scanning lines, the driving device includes: A picture detection module, used for outputting a first control signal when detecting that the next frame of displayed picture is a target picture, and for outputting a second control signal when detecting that the next frame of displayed picture is a normal picture; the target picture means that the picture displayed in the entire display area or part of the display area is arranged in a regular pattern of bright-dark-bright-dark or dark-bright-dark-bright; a display driving module, wherein an input end of the display driving module is connected to an output end of the picture detection module, and is used to output a first group of display driving signals upon receiving the first control signal, so that the data voltage variation amount in the process of controlling the switching of the scan lines by the first group of display driving signals is less than or equal to a target threshold; The display driving module is further configured to output a second group of display driving signals upon receiving the second control signal, so that the second group of display driving signals controls the N scan lines to be turned on row by row; wherein, the first group of display driving signals controls the 2a-1 scan line to be turned on for a first preset time and then starts to turn on the 2a scan line, and the 2a-1 scan line and the 2a scan line are turned off at the same time; then, the 2a scan line is turned on for a second preset time while the 2a+1 scan line is turned on; or, the first group of display driving signals controls the 2a scan line to be turned on for a first preset time and then starts to turn on the 2a+1 scan line, and the 2a scan line and the 2a+1 scan line are turned off at the same time; then, the 2a+1 scan line is turned on for a second preset time while the 2a+2 scan line is turned on; wherein, a=[1,…,B], and when N is an even number ; When N is an odd number .

2. The display driving device according to claim 1, characterized in that: When the display driving module is a level converter or a timing controller, the output end of the display driving module is connected to the clock signal receiving end of the GOA circuit of the display panel, and the first group of display driving signals and the second group of display driving signals are respectively N clock signals; Alternatively, when the display driving module is a GOA circuit, the output end of the display driving module is electrically connected to the N scan lines, and the first group of display driving signals and the second group of display driving signals are respectively N gate driving signals.

3. The display driving device according to claim 1 or 2, characterized in that: The picture detection module comprises: A picture cutting unit, wherein the input end of the picture cutting unit is connected to the output end of the next frame of the display picture, and is used to cut the next frame of the display picture into a plurality of basic detection units according to a preset cutting standard; A grayscale determination unit, the input end of which is connected to the output end of the picture cutting unit, and is used to perform grayscale determination on each basic detection unit, and output a target signal when the basic detection unit meets a preset grayscale condition; A counting unit, wherein the input end of the counting unit is connected to the output end of the grayscale determination unit, and the output end of the counting unit serves as the output end of the picture detection module, and is used to count all target signals to obtain a cumulative value corresponding to the next frame display picture. If the cumulative value is greater than or equal to a preset value, it indicates that the next frame display picture is a target picture, and a first control signal is output; if the cumulative value is less than the preset value, it indicates that the next frame display picture is a normal picture, and a second control signal is output.

4. A display driving method, characterized in that: Applicable to the display driving device according to any one of claims 1 to 3, the display driving method comprising: Detecting whether the next frame of displayed picture is a target picture, outputting a first control signal when it is detected that the next frame of displayed picture is the target picture, and outputting a second control signal when it is detected that the next frame of displayed picture is a normal picture; When the first control signal is received, a first group of display driving signals is outputted, so that the data voltage variation amount in the process of controlling the switching of the scan lines by the first group of display driving signals is less than or equal to a target threshold value; When the second control signal is received, a second group of display driving signals is output, so that the second group of display driving signals controls the N scan lines to be turned on row by row.

5. A display panel, characterized in that: The display panel comprises a display driving device as claimed in any one of claims 1 to 3; wherein: The display panel further comprises N scan lines, and the output end of the display driving module in the display driving device is connected to the N scan lines; Alternatively, the display panel further includes N scan lines and a GOA circuit, the output end of the display driving module in the display driving device is connected to the clock signal receiving end of the GOA circuit, and the gate driving signal output end of the GOA circuit is connected to the N scan lines.

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