CN118116305A - Display panel driving method and display device - Google Patents
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Abstract
The application discloses a driving method and a display device of a display panel, wherein the time for displaying a frame of picture by the display panel comprises a display period and a blank period, at least part of the blank period comprises a first sub-period, the display panel comprises M pixel rows, and the driving method comprises the following steps: acquiring the refresh frequency of the display panel; judging whether the refresh frequency is smaller than or equal to a preset threshold value; if the refresh frequency is smaller than or equal to a preset threshold value, inputting first data voltages to N pixel rows in a first subinterval of a first picture displayed at the refresh frequency, wherein N and M are positive integers; when N is smaller than M, a second data voltage is input to the 1 st to N th pixel rows and a third data voltage is input to the n+1 st to M th pixel rows in a display period of the second picture, the polarity of the second data voltage is opposite to the polarity of the first data voltage, and the polarity of the third data voltage is the same as the polarity of the first data voltage.
Description
Technical Field
The application relates to the technical field of display, in particular to a driving method of a display panel and a display device.
Background
Existing display panels are driven in a Variable refresh rate (Variable REFRESH RATE, VRR) mode. The transition of the refresh frequency is achieved by adjusting the duration of the vertical blanking interval (Vertical Blank Interval, V-blank) in VRR mode. In the VRR mode, the lower the refresh frequency, the longer the duration of the V-blank, the more leakage occurs, resulting in lower pixel electrode voltage and lower pixel display brightness. Therefore, when the high refresh frequency and the low refresh frequency are switched rapidly, the display brightness of the pixels is changed greatly, and the naked eyes of users can feel obvious flicker.
In the prior art, partial electric leakage of the V-blank area is counteracted by compensating voltage so as to improve the flicker problem in the VRR mode. However, since the polarity control signal (Polarity Control Signal, abbreviated as POL signal) of the conventional display device IS a time reversal of one frame of picture, the POL signal IS reversed after only compensating a part of pixels in the display panel within the V-blank time due to the limitation of the duration of the V-blank, resulting in the problem of image retention (IMAGE STICKING, abbreviated as IS) of the picture.
Disclosure of Invention
The embodiment of the application provides a driving method of a display panel and a display device, aiming at improving the problem of afterimage when the display panel is subjected to leakage compensation in a variable refresh rate mode.
In one aspect, an embodiment of the present application provides a driving method of a display panel, a time at which the display panel displays one frame of a picture including a display period and a blank period, the picture to be displayed of the display panel including a first picture and a second picture that are continuous in time, the display panel including M pixel rows, a polarity of a data voltage input to the pixel rows in the display period of the first picture being opposite to a polarity of the data voltage input to at least part of the pixel rows in the display period of the second picture, at least part of the blank period including a first sub-period in which a data voltage is input, the driving method including: acquiring the refresh frequency of the display panel; judging whether the refresh frequency is smaller than or equal to a preset threshold value; if the refresh frequency is smaller than or equal to the preset threshold value, inputting first data voltages to N pixel rows in the first subperiod of the first picture displayed under the refresh frequency, wherein N and M are positive integers; and if the N is smaller than the M, inputting a second data voltage to the 1 st to N th pixel rows and inputting a third data voltage to the n+1 th to M th pixel rows in the display period of the second picture, wherein the polarity of the second data voltage is opposite to the polarity of the first data voltage, and the polarity of the third data voltage is the same as the polarity of the first data voltage.
Optionally, in some embodiments of the present application, the blank period of at least part of the pictures further includes a second sub-period between the display period and the first sub-period of one frame of the pictures, and a polarity of the data voltage input to the display panel during the first sub-period is opposite to a polarity of the data voltage input to the display panel during the second sub-period.
Optionally, in some embodiments of the present application, the driving method further includes: inputting fourth data voltages of the same polarity as the first data voltages to M pixel rows within the display period of the first picture displayed at the refresh frequency; and inputting a fifth data voltage having a polarity opposite to that of the first data voltage to the M pixel rows during the second sub-period of the first picture displayed at the refresh frequency.
Optionally, in some embodiments of the present application, the absolute value of the first data voltage, the absolute value of the fourth data voltage, and the absolute value of the fifth data voltage corresponding to any one pixel of the M pixel rows are equal.
Optionally, in some embodiments of the present application, the driving method further includes: and inputting a sixth data voltage with the same polarity as the second data voltage to the M pixel rows in the second subperiod of the second picture.
Optionally, in some embodiments of the present application, the step of inputting the third data voltage to the n+1th to M-th pixel rows in the display period of the second screen includes: acquiring initial gray scale values corresponding to the (n+1) -th to (M) -th pixel rows in the second picture; calculating gray-scale compensation values corresponding to the (n+1) -th to (M) -th pixel rows in the second picture according to a preset comparison table, wherein the preset comparison table comprises the corresponding relation among the initial gray-scale value, the value of N and the gray-scale compensation value; acquiring an initial voltage corresponding to the initial gray scale value and a compensation voltage corresponding to the gray scale compensation value according to a gray scale-voltage comparison table, wherein the gray scale-voltage table comprises a corresponding relation between gray scales and voltages; and calculating the third data voltage according to the initial voltage and the compensation voltage.
Optionally, in some embodiments of the application, the first gray scale compensation value corresponding to the N and the initial gray scale value is greater than the second gray scale compensation value corresponding to N-1 and the initial gray scale value.
Optionally, in some embodiments of the present application, the driving method further includes: and if the refresh frequency is greater than the preset threshold value, stopping inputting the first data voltage to the pixel row in the blank period.
Optionally, in some embodiments of the present application, a duration of the second sub-period of the first picture is not equal to a duration of the second sub-period of the second picture.
In another aspect, the present application provides a display device including: a display panel and a driving circuit electrically connected to the display panel, wherein a time for the display panel to display one frame of a picture includes a display period and a blank period, a data voltage is input to the display panel during the display period and at least a part of the blank period, a picture to be displayed by the display panel includes a first picture and a second picture which are continuous in time, a polarity of the data voltage input to the display panel during the display period of the first picture is opposite to a polarity of the data voltage input to the display panel during the display period of the second picture, the blank period includes a first sub-period, and the display panel includes M pixel rows; the driving circuit includes: the display device comprises an acquisition module, a judging module and a driving module, wherein the acquisition module is used for acquiring the refresh frequency of the display panel; the judging module is used for judging whether the refreshing frequency is smaller than or equal to a preset threshold value; the driving module is configured to input a first data voltage to N pixel rows in the first subinterval of the first frame displayed at the refresh frequency if the refresh frequency is less than or equal to the preset threshold, where N and M are positive integers, and input a second data voltage to the 1 st to N pixel rows and input a third data voltage to the n+1th to M pixel rows in the display period of the second frame if N is less than M, where a polarity of the second data voltage is opposite to a polarity of the first data voltage, and a polarity of the third data voltage is the same as a polarity of the first data voltage.
In the driving method of the display panel and the display device provided by the application, the refresh frequency of the display panel is obtained; judging whether the refresh frequency is smaller than or equal to a preset threshold value; if the refresh frequency is smaller than or equal to the preset threshold value, inputting first data voltages to N pixel rows in the first subperiod of the first picture displayed under the refresh frequency, wherein N and M are positive integers; when N is smaller than M, a second data voltage is input to the 1 st to nth pixel rows and a third data voltage is input to the n+1th to mth pixel rows in the display period of the second picture, wherein the polarity of the second data voltage is opposite to the polarity of the first data voltage, the polarity of the third data voltage is the same as the polarity of the first data voltage, i.e., if only the first data voltage is input to the N pixel rows in the first sub-period, N is smaller than M, the polarity of the data voltage corresponding to the n+1th to mth pixel rows is opposite to the polarity of the data voltage corresponding to the 1 st to nth pixel rows in the display period of the second picture, and the third data voltage is input to the n+1th to mth pixel rows in the display period of the second picture, wherein the polarity of the second data voltage is opposite to the first data voltage, and the polarity of the data voltage corresponding to the first data voltage is opposite to the first data voltage, and the polarity of the data voltage corresponding to the n+1st pixel rows in the display period of the second picture is prevented from causing a problem.
Drawings
FIG. 1 is a schematic diagram of a display device provided by the present application;
Fig. 2 is a schematic diagram of a driving circuit in the display device provided in fig. 1;
Fig. 3 is a driving timing chart of a display device according to a first embodiment of the present application;
FIG. 4 is a flow chart of a driving method of a display panel provided by the application;
fig. 5 is a driving timing chart of a display device according to a second embodiment of the present application;
Fig. 6 is a driving timing chart of a display device according to a third embodiment of the present application;
fig. 7 is a flowchart of a sub-step of step S40 in fig. 4.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. The described technical solutions are only used for explaining and explaining the idea of the present application and should not be construed as limiting the scope of protection of the present application.
The various embodiments provided by the application are similar in that features of different embodiments may be combined with each other.
As shown in fig. 1, the present application provides a display device 100 including: the display panel 110 and the driving circuit 120, the driving circuit 120 is electrically connected with the display panel 110.
The display panel comprises a display period and a blank period, wherein the display panel displays a frame of pictures, the pictures to be displayed by the display panel comprise a first picture and a second picture which are continuous in time, the display panel comprises M pixel rows, the polarity of data voltages input to the pixel rows in the display period of the first picture is opposite to the polarity of data voltages input to at least part of the pixel rows in the display period of the second picture, at least part of the blank period comprises a first sub-period, and the data voltages are input in the first sub-period. Each pixel row includes a plurality of pixels 10 arranged at intervals in the width direction of the display panel, or a plurality of pixels 10 arranged at intervals in the length direction of the display panel.
As shown in fig. 2, the driving circuit 120 includes: an acquisition module 121, a judgment module 122, and a driving module 123.
In an embodiment of the present application, the obtaining module 121 is configured to obtain a refresh frequency of the display panel 110.
In an embodiment of the present application, the determining module 122 is configured to determine whether the refresh frequency is less than or equal to a preset threshold, and to determine whether N is less than M.
In the embodiment of the present application, the driving module 123 is configured to input the first data voltage to N pixel rows in the first subinterval of the first picture displayed at the refresh frequency if the refresh frequency is less than or equal to the preset threshold, where N and M are both positive integers. The first data voltage refers to a corresponding data voltage input to each pixel in the N pixel rows in the first sub-period.
In the embodiment of the present application, the driving module 123 is further configured to input a second data voltage to the 1 st to nth pixel rows and a third data voltage to the n+1st to mth pixel rows in the display period of the second frame if N is less than M, wherein the polarity of the second data voltage is opposite to the polarity of the first data voltage, and the polarity of the third data voltage is the same as the polarity of the first data voltage. The second data voltage refers to a corresponding data voltage input to each pixel in the 1 st to nth pixel rows in a display period of the second picture. The third data voltage refers to a corresponding data voltage input to each pixel in the n+1th to M-th pixel rows in the display period of the second picture.
In an embodiment of the present application, if the refresh frequency is greater than a preset threshold, the input of the first data voltage to the pixel row is stopped in the blank period.
In an embodiment of the application, N is less than or equal to M. The duration of the first sub-period is inversely related to the magnitude of the refresh frequency. I.e. the smaller the refresh frequency the longer the duration of the first sub-period, whereas the larger the refresh frequency the shorter the duration of the first sub-period. Wherein, the value of N is positively correlated with the duration of the first subperiod. The longer the duration of the first sub-period, the larger the value of N, i.e., the longer the duration of the first sub-period, the greater the number of sub-pixel rows that receive the first data voltage. When the duration of the first sub-period is less than the duration required to refresh M rows of pixels, N is less than M. When the duration of the first sub-period is equal to the duration required to refresh M pixel rows, N is equal to M.
In an embodiment of the present application, the blank period of at least a portion of the frame further includes a second sub-period, the second sub-period being located between the display period and the first sub-period, the polarity of the data voltage input to the display panel in the first sub-period being opposite to the polarity of the data voltage input to the display panel in the second sub-period.
In an embodiment of the present application, a fourth data voltage having the same polarity as the first data voltage is input to M pixel rows during a display period of a first picture displayed at a refresh frequency. A fifth data voltage having a polarity opposite to that of the first data voltage is input to the M pixel rows during a second sub-period of the first picture displayed at the refresh frequency. The first data voltage is input to the N pixel rows in a first subinterval of the first picture displayed at the refresh frequency. M and N are positive integers, and N is less than or equal to M.
In the embodiment of the present application, the absolute value of the first data voltage, the absolute value of the fourth data voltage, and the absolute value of the fifth data voltage corresponding to any one pixel in the M pixel rows are equal. The polarity of the first data voltage is opposite to the polarity of the fifth data voltage, and the polarity of the first data voltage is the same as the polarity of the fourth data voltage. For example, the first data voltage is a positive polarity data voltage, the fifth data voltage is a negative polarity data voltage, and the fourth data voltage is a positive polarity data voltage. Or the first data voltage is a negative data voltage, the fifth data voltage is a positive data voltage, and the fourth data voltage is a negative data voltage.
In the display device provided by the application, the refresh frequency of the display panel is obtained. And judging whether the refresh frequency is smaller than or equal to a preset threshold value. If the refresh frequency is less than or equal to the preset threshold, inputting first data voltages to N pixel rows in a first subinterval of a first picture displayed at the refresh frequency, wherein N and M are positive integers. And judging whether N is smaller than M. When N is smaller than M, a second data voltage is input to the 1 st to N th pixel rows and a third data voltage is input to the n+1 st to M th pixel rows in the display period of the second picture, wherein the polarity of the second data voltage is opposite to the polarity of the first data voltage, the polarity of the third data voltage is the same as the polarity of the first data voltage, i.e., if the first data voltage is input to only the N pixel rows in the first sub-period, N is smaller than M, the polarity of the data voltage corresponding to the n+1 th to M th pixel rows is opposite to the polarity of the data voltage corresponding to the 1 st to N th pixel rows, and the polarity of the third data voltage is input to the n+1 st to M th pixel rows in the display period of the second picture, so that the polarity of the data voltage corresponding to the n+1 th pixel row is the same as the first data voltage in the first sub-period, and the problem of displaying of the data corresponding to the M pixel rows in the first sub-period of the second picture is avoided.
As shown in fig. 3 and 4, the time for which the display panel displays one Frame (Frame) picture (a/B/C/D/E) includes a display period T1 and a blank period T2, a Data voltage Data is input to the display panel in the display period T1 and at least a portion of the blank period T2, the picture to be displayed by the display panel includes a first picture (D) and a second picture (E) which are consecutive in time, the display panel includes M pixel rows, a polarity of a Data voltage input to the pixel rows in the display period T1 of the first picture (D) is opposite to a polarity of a Data voltage input to at least a portion of the pixel rows in the display period T1 of the second picture (E), and at least a portion of the blank period T2 includes a first sub-period T1 in which the Data voltage is input. The polarity control signal POL is inverted once by one Frame (Frame) of the picture (A/B/C/D/E).
In an embodiment of the present application, the display panel includes M pixel rows, where M is a positive integer. The value of M includes 32, 64, 96, 1048, 1080 and so on. The value of M can be correspondingly adjusted according to the resolution of the display panel.
As shown in fig. 4, an embodiment of the present application provides a driving method of a display panel, including the steps of:
S10, acquiring the refresh frequency of the display panel.
In an embodiment of the present application, image data of a screen displayed at a refresh frequency is acquired. The image data includes initial gray-scale values, initial brightness values, initial data voltage values, and the like corresponding to the M pixel rows.
S20, judging whether the refresh frequency is smaller than or equal to a preset threshold value.
In an embodiment of the present application, the preset threshold has a value between 60 hz and 70 hz. Specifically, the preset threshold values include 60 hz, 61 hz, 62 hz, 63 hz, 64 hz, 65 hz, 66 hz, 67 hz, 68 hz, 69 hz and 70 hz.
In an embodiment of the present application, it is determined whether the refresh frequency is between 60 hz and 70 hz, for example, the refresh frequency is 60 hz, or 65 hz, or 70 hz. Or whether the refresh frequency is less than 60 hz, for example, 59 hz, or 55 hz, or 50 hz, etc.
In an embodiment of the present application, if the refresh frequency is greater than a preset threshold, the data voltage is stopped from being input to the pixel row in the blank period. As shown in fig. 3, the refresh frequency corresponding to the picture a/B/C is greater than the preset threshold, that is, the duration of the blanking period corresponding to the picture a/B/C is shorter, so that the leakage of electricity is less in the blanking period, and thus, the data voltage does not need to be input to the pixel row in the blanking period corresponding to the picture a/B/C.
S30, if the refresh frequency is smaller than or equal to a preset threshold value, inputting first data voltages to N pixel rows in a first subinterval of a first picture displayed at the refresh frequency, wherein N and M are positive integers.
In the embodiment of the present application, if the refresh frequency is less than or equal to the preset threshold, that is, if the refresh frequency is less than 60 hz or between 60 hz and 70 hz, the leakage phenomenon during the blank phase of the first frame displayed at the refresh frequency is serious, so that the first data voltage data1 needs to be input to the N pixel rows during the first sub-period of the first frame displayed at the refresh frequency to improve the problem of the brightness decrease caused by the leakage during the blank phase of the first frame.
In an embodiment of the application, N is less than or equal to M. The duration of the first sub-period is inversely related to the magnitude of the refresh frequency. I.e. the smaller the refresh frequency the longer the duration of the first sub-period, whereas the larger the refresh frequency the shorter the duration of the first sub-period. Wherein, the value of N is positively correlated with the duration of the first subperiod. The longer the duration of the first sub-period, the larger the value of N, i.e., the longer the duration of the first sub-period, the greater the number of sub-pixel rows that receive the first data voltage data 1. When the duration of the first sub-period is less than the duration required to refresh M rows of pixels, N is less than M. When the duration of the first sub-period is equal to the duration required to refresh M pixel rows, N is equal to M.
In the embodiment of the present application, if N is equal to M, the second data voltage data2 is input to M pixel rows in the display period of the second frame. Wherein, the polarity of the second data voltage data2 is opposite to the polarity of the first data voltage data 1.
S40, if N is smaller than M, inputting a second data voltage data2 to the 1 st to nth pixel rows and inputting a third data voltage data3 to the n+1st to mth pixel rows in the display period of the second picture, wherein the polarity of the second data voltage data2 is opposite to the polarity of the first data voltage data1, and the polarity of the third data voltage data3 is the same as the polarity of the first data voltage data 1.
In an embodiment of the present application, the refresh rate includes a first refresh rate and a second refresh rate, both of which are less than or equal to a preset threshold. The first picture is displayed at a first refresh frequency. And displaying the second picture at the second refresh frequency. Wherein. The first refresh frequency and the second refresh frequency may or may not be equal. If the first refresh frequency is equal to the second refresh frequency, the duration of the first sub-period of the second picture is equal to the duration of the first sub-period of the first picture. That is, the second data voltage data2 is input to N pixel rows in the first subinterval of the second picture.
In an embodiment of the application, the refresh frequency further comprises a third refresh frequency. The third refresh frequency is greater than a preset threshold. The blank period of the picture a/B/C displayed at the third refresh frequency stops inputting the first data voltage data1 to the pixel row.
As shown in fig. 5, the time for which the display panel displays one Frame (Frame) picture (a/B/C/D/E) includes a display period T1 and a blank period T2, the Data voltages Data are input to the display panel in the display period T1 and at least a part of the blank period T2, the display panel includes M pixel rows, the polarities of the Data voltages input to the pixel rows in the display period T1 of the first picture (D) are opposite to the polarities of the Data voltages input to at least a part of the pixel rows in the display period T1 of the second picture (E), and at least a part of the blank period T2 includes a first sub-period T1 in which the Data voltages are input. The polarity control signal POL is inverted once by one Frame (Frame) of the picture (A/B/C/D/E).
In the embodiment of the application, the blank period T2 of at least a part of the frames further includes a second sub-period T2, and the second sub-period T2 is located between the display period T1 of one Frame (Frame) of the frames (D/E) and the first sub-period T1, and the polarity of the Data voltage Data input to the display panel in the first sub-period T1 is opposite to the polarity of the Data voltage Data input to the display panel in the second sub-period T2.
In the embodiment of the present application, the fourth data voltage data4 having the same polarity as the first data voltage data1 is input to M pixel rows for the display period T1 of the first picture displayed at the refresh frequency. A fifth data voltage data5 having a polarity opposite to that of the first data voltage data1 is input to the M pixel rows in a second sub-period of the first picture displayed at the refresh frequency. The first data voltage data1 is input to N pixel rows in a first subinterval of the first picture displayed at the refresh frequency. M and N are positive integers, and N is less than or equal to M.
In the embodiment of the present application, the absolute value of the first data voltage data1, the absolute value of the fourth data voltage data4, and the absolute value of the fifth data voltage data5 corresponding to any pixel in the M pixel rows are equal. The polarity of the first data voltage data1 is opposite to the polarity of the fifth data voltage data5, and the polarity of the first data voltage data1 and the polarity of the fourth data voltage data4 are the same. For example, the first data voltage data1 is a positive polarity data voltage, the fifth data voltage data5 is a negative polarity data voltage, and the fourth data voltage data4 is a positive polarity data voltage. Or the first data voltage data1 is a negative polarity data voltage, the fifth data voltage data5 is a positive polarity data voltage, and the fourth data voltage data4 is a negative polarity data voltage.
In an embodiment of the present application, the first refresh frequency is equal to the second refresh frequency, and the blank period of the second picture includes a second sub-period. The sixth data voltage data6 having the same polarity as the second data voltage data2 is input to the M pixel rows in the second sub period of the second picture.
As another embodiment, the first refresh rate and the second refresh rate are not equal, and both the first refresh rate and the second refresh rate are less than a preset threshold. Wherein the first refresh frequency is less than the second refresh frequency. The duration of the second sub-period of the first picture is not equal to the duration of the second sub-period of the second picture. Specifically, the blank period of the first picture displayed at the first refresh frequency includes at least two second sub-periods and a first sub-period. The blank period of the second picture displayed at the second refresh frequency includes a second sub-period and a first sub-period. That is, the number of second sub-periods included in the blanking period of the first picture is greater than the number of second sub-periods included in the blanking period of the second picture.
As shown in fig. 6, the time for which the display panel displays one Frame (Frame) picture (a/B/C/D/E) includes a display period T1 and a blank period T2, the Data voltage Data is input to the display panel in the display period T1 and at least a part of the blank period T2, the display panel includes M pixel rows, the polarity of the Data voltage input to the pixel rows in the display period T1 of the first picture (D) is opposite to the polarity of the Data voltage input to at least a part of the pixel rows in the display period T1 of the second picture (E), and the at least a part of the blank period T2 includes a first sub-period T1 and a second sub-period T2 in which the Data voltage is input. The second sub-period T2 is located between the display period T1 of one Frame (Frame) picture (D/E) and the first sub-period T1. The polarity control signal POL is inverted once by one Frame (Frame) of the picture (A/B/C/D/E). The polarity of the Data voltage Data input to the display panel in the first sub-period T1 is opposite to the polarity of the Data voltage Data input to the display panel in the second sub-period T2. The first screen (D) includes two second sub-periods t2 and one first sub-period t1. The second picture (E) includes a second sub-period t2 and a first sub-period t1.
As shown in fig. 7, the step of inputting the third data voltage data3 to the n+1th to mth pixel rows in the display period of the second picture includes the sub-steps of:
S401, obtaining initial gray scale values corresponding to the (n+1) -th to M-th pixel rows in the second picture.
In the embodiment of the present application, since the data voltage is not input to the n+1th to mth pixel rows to perform the leakage compensation for the n+1th to mth pixel rows in the first sub-period of the first screen, the luminance of the n+1th to mth pixel rows is different from the luminance of the 1 st to nth pixel rows.
S402, calculating gray-scale compensation values corresponding to the (n+1) -th to (M) -th pixel rows in the second picture according to a preset comparison table, wherein the preset comparison table comprises the initial gray-scale values, the N values and the corresponding relation of the gray-scale compensation values.
Since the first data voltage data1 is inputted to only N pixel rows in the first sub-period of the first picture, and the second data voltage data2 is inputted to N pixel rows in turn in the display period of the second picture, the greater N is, the longer the data voltage is not applied to the n+1th to mth pixel rows, and thus the more serious the leakage phenomenon is.
In an embodiment of the present application, the first gray-scale compensation value corresponding to N and the initial gray-scale value is greater than the second gray-scale compensation value corresponding to N-1 and the initial gray-scale value. That is, the larger N is, the larger the gray-scale compensation value corresponding to any one of the initial gray-scale values is. The initial gray scale value is between 0 and 255, wherein the initial gray scale value comprises 0, 8, 16, 192, 224, 255 and the like. For example, M is 1080, the initial gray scale value is 8, and the first gray scale compensation value corresponding to the 8 gray scale when N is 1048 is greater than the second gray scale compensation value corresponding to the 8 gray scale when N is 32, so as to improve the brightness uniformity of the display panel.
S403, obtaining initial voltage corresponding to the initial gray scale value and compensation voltage corresponding to the gray scale compensation value according to a gray scale-voltage comparison table, wherein the gray scale-voltage table comprises the corresponding relation between gray scale and voltage.
S404, calculating the third data voltage data3 according to the initial voltage and the compensation voltage.
In an embodiment of the present application, the third data voltage data3 is equal to the sum of the initial voltage and the compensation voltage.
In the driving method of the display panel, the refresh frequency of the display panel is obtained. And judging whether the refresh frequency is smaller than or equal to a preset threshold value. If the refresh frequency is less than or equal to the preset threshold, the first data voltage data1 is input to N pixel rows in the first subinterval of the first picture displayed at the refresh frequency, where N and M are both positive integers. And judging whether N is smaller than M. In case that N is smaller than M, the second data voltage data2 is input to the 1 st to N-th pixel rows and the third data voltage data3 is input to the n+1th to M-th pixel rows in the display period of the second picture, wherein the polarity of the second data voltage data2 is opposite to the polarity of the first data voltage data1, the polarity of the third data voltage data3 is the same as the polarity of the first data voltage data1, i.e., if the first data voltage data1 is input to only the N-th pixel rows in the first sub-period, N is smaller than M, the polarity of the data voltage corresponding to the n+1th to M-th pixel rows is opposite to the polarity of the data voltage corresponding to the 1 st to N-th pixel rows, the second data voltage data2 is input to the 1 st to the N th pixel rows and the third data voltage data3 is input to the n+1 th to the M th pixel rows in the display period of the second picture, wherein the polarity of the second data voltage data2 is opposite to that of the first data voltage data1, and the polarity of the third data voltage data3 is the same as that of the first data voltage data1, so that the problem of afterimage of the display picture caused by the fact that the corresponding data voltages of the n+1 th to the M th pixel rows in the first subperiod of the first picture are the same as that of the third data voltage data3 in the display period of the second picture is avoided.
The above description has been given in detail to a driving method of a display panel and a display device according to the embodiments of the present application, and the above description of the embodiments is only for helping to understand the core idea of the present application, and the above description should not be construed as limiting the protection scope of the present application.
Claims (10)
1. A driving method of a display panel, wherein a time at which the display panel displays one frame of a picture includes a display period and a blank period, the picture to be displayed by the display panel includes a first picture and a second picture which are continuous in time, the display panel includes M pixel rows, a polarity of a data voltage input to the pixel rows in the display period of the first picture is opposite to a polarity of the data voltage input to at least part of the pixel rows in the display period of the second picture, and at least part of the blank period includes a first sub-period in which a data voltage is input, the driving method comprising:
Acquiring the refresh frequency of the display panel;
judging whether the refresh frequency is smaller than or equal to a preset threshold value;
If the refresh frequency is smaller than or equal to the preset threshold value, inputting first data voltages to N pixel rows in the first subperiod of the first picture displayed under the refresh frequency, wherein N and M are positive integers;
And if the N is smaller than the M, inputting a second data voltage to the 1 st to N th pixel rows and inputting a third data voltage to the n+1 th to M th pixel rows in the display period of the second picture, wherein the polarity of the second data voltage is opposite to the polarity of the first data voltage, and the polarity of the third data voltage is the same as the polarity of the first data voltage.
2. The driving method of a display panel according to claim 1, wherein the blank period of at least part of the picture further includes a second sub-period between the display period and the first sub-period of one frame of the picture, the polarity of the data voltage input to the display panel during the first sub-period being opposite to the polarity of the data voltage input to the display panel during the second sub-period.
3. The driving method of a display panel according to claim 2, wherein the driving method further comprises: inputting fourth data voltages of the same polarity as the first data voltages to M pixel rows within the display period of the first picture displayed at the refresh frequency;
And inputting a fifth data voltage having a polarity opposite to that of the first data voltage to the M pixel rows during the second sub-period of the first picture displayed at the refresh frequency.
4. The driving method of a display panel according to claim 3, wherein an absolute value of the first data voltage, an absolute value of the fourth data voltage, and an absolute value of the fifth data voltage corresponding to any one pixel of the M pixel rows are equal.
5. The driving method of a display panel according to claim 2, wherein the driving method further comprises: and inputting a sixth data voltage with the same polarity as the second data voltage to the M pixel rows in the second subperiod of the second picture.
6. The driving method of a display panel according to claim 1, wherein the step of inputting the third data voltage to the n+1th to mth pixel rows in the display period of the second picture comprises:
acquiring initial gray scale values corresponding to the (n+1) -th to (M) -th pixel rows in the second picture;
calculating gray-scale compensation values corresponding to the (n+1) -th to (M) -th pixel rows in the second picture according to a preset comparison table, wherein the preset comparison table comprises the corresponding relation among the initial gray-scale value, the value of N and the gray-scale compensation value;
Acquiring an initial voltage corresponding to the initial gray scale value and a compensation voltage corresponding to the gray scale compensation value according to a gray scale-voltage comparison table, wherein the gray scale-voltage table comprises a corresponding relation between gray scales and voltages;
and calculating the third data voltage according to the initial voltage and the compensation voltage.
7. The driving method of a display panel according to claim 6, wherein a first gray-scale compensation value corresponding to the N and the initial gray-scale value is greater than a second gray-scale compensation value corresponding to the N-1 and the initial gray-scale value.
8. The driving method of a display panel according to claim 1, further comprising: and if the refresh frequency is greater than the preset threshold value, stopping inputting the first data voltage to the pixel row in the blank period.
9. The driving method of a display panel according to claim 1, wherein a duration of the second sub-period of the first picture is not equal to a duration of the second sub-period of the second picture.
10. A display device, comprising:
A display panel, wherein the time for displaying one frame of pictures by the display panel comprises a display period and a blank period, data voltages are input to the display panel in the display period and at least part of the blank period, the pictures to be displayed by the display panel comprise a first picture and a second picture which are continuous in time, the polarity of the data voltages input to the display panel in the display period of the first picture is opposite to the polarity of the data voltages input to the display panel in the display period of the second picture, the blank period comprises a first subperiod, and the display panel comprises M pixel rows;
a driving circuit electrically connected with the display panel, the driving circuit comprising:
the acquisition module is used for acquiring the refresh frequency of the display panel;
the judging module is used for judging whether the refreshing frequency is smaller than or equal to a preset threshold value;
The driving module is configured to input a first data voltage to N pixel rows in the first subperiod of the first frame displayed at the refresh frequency if the refresh frequency is less than or equal to the preset threshold, where N and M are positive integers, and input a second data voltage to the 1 st to N th pixel rows and input a third data voltage to the n+1th to M th pixel rows in the display period of the second frame if the N is less than the M, where a polarity of the second data voltage is opposite to a polarity of the first data voltage, and a polarity of the third data voltage is the same as a polarity of the first data voltage.
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| CN202410123619.5A CN118116305A (en) | 2024-01-29 | 2024-01-29 | Display panel driving method and display device |
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| CN202410123619.5A CN118116305A (en) | 2024-01-29 | 2024-01-29 | Display panel driving method and display device |
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