Display module driving method, circuit and display device

Abstract

The present invention provides a driving method, circuit, and display device for a display module, belonging to the field of display technology. The driving method includes: for the ath sub-pixel of each group of sub-pixels, in the transition period between the display time periods of two adjacent ath sub-pixels, inputting a transition data signal to the data line corresponding to the ath sub-pixel, and inputting a shutdown signal to the gate scan signal line corresponding to the two adjacent ath sub-pixels, wherein the potential of the transition data signal is less than a first potential and greater than a second potential, wherein the first potential is the maximum value of the data signals of the two adjacent ath sub-pixels in the display time period, and the second potential is the minimum value of the data signals of the two adjacent ath sub-pixels in the display time period. The technical solution of the present invention can reduce display noise.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a driving method, circuit and display device of a display module. Background Art

[0002] Display products are often equipped with capacitive active pens. However, due to display noise interference, the active pen signal is easily interfered with or even drowned out by the noise, resulting in poor performance and difficulty ensuring a good user experience. Some manufacturers use higher active pen drive voltages to enhance the active pen signal, but this approach does not fundamentally solve the problem. The higher the voltage, the greater the power consumption, which affects the active pen's battery life. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a driving method, a circuit and a display device of a display module, which can reduce display noise.

[0004] To solve the above technical problems, the embodiments of the present invention provide the following technical solutions:

[0005] In one aspect, a method for driving a display module is provided, wherein the display module includes a plurality of sub-pixels arranged in an array, a plurality of groups of gate scanning signal lines, and a plurality of groups of data lines, wherein a group of gate scanning signal lines is electrically connected to n rows of sub-pixels; a column of sub-pixels is electrically connected to a group of data lines; a column of sub-pixels includes a plurality of groups of sub-pixels, each group of sub-pixels includes n sub-pixels, and the n sub-pixels are respectively electrically connected to n data lines of a group of data lines electrically connected to the sub-pixels in the column, where n is a positive integer. The driving method includes:

[0006] For the ath sub-pixel of each group of sub-pixels, in a transition time period between the display time periods of two adjacent ath sub-pixels, a transition data signal is input to the data line corresponding to the ath sub-pixel, and a shutdown signal is input to the gate scan signal line corresponding to the two adjacent ath sub-pixels, where the potential of the transition data signal is less than a first potential and greater than a second potential, where the first potential is the maximum value of the data signals of the two adjacent ath sub-pixels in the display time period, and the second potential is the minimum value of the data signals of the two adjacent ath sub-pixels in the display time period, and a is a positive integer less than or equal to n.

[0007] In some embodiments, n is equal to 1 or 2.

[0008] In some embodiments, when n is equal to 2, the ath sub-pixel is a sub-pixel in an even-numbered row or a sub-pixel in an odd-numbered row in each group of sub-pixels.

[0009] In some embodiments, the transition time period corresponding to the sub-pixels in the even-numbered rows does not overlap with the transition time period corresponding to the sub-pixels in the odd-numbered rows.

[0010] In some embodiments, the transition data signal includes at least one sub-transition data signal, and a potential of each of the sub-transition data signals is smaller than a first potential and larger than a second potential.

[0011] In some embodiments, the transition data signal includes m sub-transition data signals in sequence, where m is an integer greater than 1, and the potential of the kth sub-transition data signal is greater than the potential of the k+1th sub-transition data signal; or

[0012] The potential of the k+1th sub-transition data signal is greater than the potential of the kth sub-transition data signal;

[0013] k is an integer smaller than m and greater than or equal to 1.

[0014] In some embodiments, the potential of the transition data signal changes linearly between the first potential and the second potential.

[0015] An embodiment of the present invention further provides a driving circuit for a display module, wherein the display module includes a plurality of sub-pixels arranged in an array, a plurality of groups of gate scanning signal lines, and a plurality of groups of data lines, wherein a group of gate scanning signal lines is electrically connected to n rows of sub-pixels; a column of sub-pixels is electrically connected to a group of data lines; a column of sub-pixels includes a plurality of groups of sub-pixels, each group of sub-pixels includes n sub-pixels, and the n sub-pixels are respectively electrically connected to n data lines of a group of data lines electrically connected to the sub-pixels in the column, where n is a positive integer. The driving circuit includes:

[0016] A driving module is used to input a transition data signal to the data line corresponding to the ath sub-pixel of each group of sub-pixels, and input a shutdown signal to the gate scan signal line corresponding to the two adjacent ath sub-pixels, for a transition time period between the display time periods of two adjacent ath sub-pixels. The potential of the transition data signal is less than a first potential and greater than a second potential, the first potential is the maximum value of the data signals of the two adjacent ath sub-pixels in the display time period, and the second potential is the minimum value of the data signals of the two adjacent ath sub-pixels in the display time period, and a is a positive integer less than or equal to n.

[0017] In some embodiments, n is equal to 1 or 2.

[0018] In some embodiments, the ath sub-pixel is a sub-pixel in an even-numbered row or a sub-pixel in an odd-numbered row in each group of sub-pixels.

[0019] In some embodiments, the transition time period corresponding to the sub-pixels in the even-numbered rows does not overlap with the transition time period corresponding to the sub-pixels in the odd-numbered rows.

[0020] In some embodiments, the transition data signal includes at least one sub-transition data signal, and a potential of each of the sub-transition data signals is smaller than a first potential and larger than a second potential.

[0021] In some embodiments, the transition data signal includes m sub-transition data signals in sequence, where m is an integer greater than 1, and the potential of the kth sub-transition data signal is greater than the potential of the k+1th sub-transition data signal; or

[0022] The potential of the k+1th sub-transition data signal is greater than the potential of the kth sub-transition data signal;

[0023] k is an integer smaller than m and greater than or equal to 1.

[0024] In some embodiments, the potential of the transition data signal changes linearly between the first potential and the second potential.

[0025] An embodiment of the present invention further provides a display device, including a display module and a touch module, and also including the driving circuit of the display module as described above.

[0026] The embodiments of the present invention have the following beneficial effects:

[0027] In the above scheme, through data signal processing, a transition data signal is input to the data line in the transition time period between the display time periods of two adjacent groups of sub-pixels. The potential of the transition data signal is less than the first potential and greater than the second potential, so that the switching of different grayscale potentials between different groups of sub-pixels is smoother, which can reduce the impact of the data signal on the voltage on the display electrode, reduce the fluctuation amplitude of the voltage on the display electrode, further reduce the impact on the touch electrode signal, reduce display noise from the display end, and improve the active pen signal-to-noise ratio, thereby allowing the active pen to work at a lower driving voltage and achieve longer battery life. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic diagram showing a black and white line screen;

[0029] Figure 2-Figure 5 Schematic diagram of a driving signal according to an embodiment of the present invention. DETAILED DESCRIPTION

[0030] In order to make the technical problems, technical solutions and advantages to be solved by the embodiments of the present invention clearer, they will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] When the display module switches the display screen, the data signals on all data lines will undergo synchronous signal jumps. The jump signals will cause the potential fluctuations of the display electrodes through the coupling capacitance between the data lines and the display electrodes. The potential fluctuations of the display electrodes further affect the signals on the touch electrodes, thereby generating noise effects on the touch electrode signals.

[0032] Embodiments of the present invention provide a display module driving method, a circuit, and a display device, which can reduce display noise.

[0033] An embodiment of the present invention provides a method for driving a display module, wherein the display module includes a plurality of sub-pixels arranged in an array, a plurality of groups of gate scanning signal lines, and a plurality of groups of data lines, wherein a group of gate scanning signal lines is electrically connected to n rows of sub-pixels; a column of sub-pixels is electrically connected to a group of data lines; a column of sub-pixels includes a plurality of groups of sub-pixels, each group of sub-pixels includes n sub-pixels, and the n sub-pixels are respectively electrically connected to n data lines of a group of data lines electrically connected to the sub-pixels in the column, where n is a positive integer. The driving method includes:

[0034] For the ath sub-pixel of each group of sub-pixels, in a transition time period between the display time periods of two adjacent ath sub-pixels, a transition data signal is input to the data line corresponding to the ath sub-pixel, and a shutdown signal is input to the gate scan signal line corresponding to the two adjacent ath sub-pixels, where the potential of the transition data signal is less than a first potential and greater than a second potential, where the first potential is the maximum value of the data signals of the two adjacent ath sub-pixels in the display time period, and the second potential is the minimum value of the data signals of the two adjacent ath sub-pixels in the display time period, and a is a positive integer less than or equal to n.

[0035] In this embodiment, through data signal processing, a transition data signal is input to the data line in the transition time period between the display time periods of two adjacent groups of sub-pixels. The potential of the transition data signal is less than the first potential and greater than the second potential, so that the switching of different grayscale potentials between different groups of sub-pixels is smoother, which can reduce the impact of the data signal on the voltage on the display electrode, reduce the fluctuation amplitude of the voltage on the display electrode, further reduce the impact on the touch electrode signal, reduce display noise from the display end, and improve the active pen signal-to-noise ratio, thereby allowing the active pen to work at a lower driving voltage and achieve a longer battery life.

[0036] In this embodiment, n may be 1, 2, 3 or a greater value, that is, each group of sub-pixels may include 1 sub-pixel, 2 sub-pixels or more sub-pixels.

[0037] When n takes the value of 1, a group of gate scanning signal lines includes a gate scanning signal line, and a gate scanning signal line is electrically connected to a row of sub-pixels; a group of data lines includes a data line, and a data line is electrically connected to a column of sub-pixels. In a column of sub-pixels, during the display period of the p-th sub-pixel, a first data signal is input to the data line corresponding to the sub-pixels in the column, and during the display period of the p+1-th sub-pixel, a second data signal is input to the data line corresponding to the sub-pixels in the column. The potential of the data signal with a larger potential between the first data signal and the second data signal is the first potential, and the potential of the data signal with a smaller potential between the first data signal and the second data signal is the second potential. The potential difference between the first data signal and the second data signal may be relatively large, for example, when displaying Figure 1 In the black and white line picture shown, the grayscale corresponding to the first data signal is 0, and the grayscale corresponding to the second data signal is 255; or, the grayscale corresponding to the second data signal is 0, and the grayscale corresponding to the first data signal is 255. At this time, the jump between the data signals will affect the display electrode, and then affect the touch electrode, causing the touch signal to be affected by the display noise.

[0038] To reduce display noise, in this embodiment, for each column of sub-pixels, a transition period is inserted between the display periods of two adjacent sub-pixels. During this transition period, the sub-pixels do not display, thus having no impact on the image actually displayed by the display module. During this transition period, a transition data signal is input to the data line corresponding to the sub-pixels in that column. The potential of the transition data signal lies between the potentials of the first data signal and the second data signal. This allows for smoother switching between different grayscale potentials between adjacent sub-pixels, reduces the impact of the data signal on the voltage on the display electrode, reduces the fluctuation amplitude of the voltage on the display electrode, and further reduces the impact on the touch electrode signal, thereby reducing display noise at the display end.

[0039] The duration of the transition period depends on the screen resolution, refresh rate, data line load, and the response speed and / or drive capability of the gate drive circuit. Based on screen parameter requirements, the actual display time can be compressed to the minimum required for normal display, with the remaining time allocated to the transition period. This allows the display electrodes to recover from potential fluctuations caused by the coupled signal before being affected by the subsequent data line signal transition.

[0040] In some embodiments, the transition data signal includes at least one sub-transition data signal, and a potential of each of the sub-transition data signals is smaller than a first potential and larger than a second potential.

[0041] The potential of the sub-transition data signal can be determined based on the first potential and the second potential. For example, the transition data signal includes only one sub-transition data signal, and the potential of the sub-transition data signal can be an intermediate value between the first potential and the second potential. Of course, the potential of the sub-transition data signal can also be slightly larger or smaller than the intermediate value. In a specific example, Figure 2 As shown, when the display module displays black and white lines, the first row of sub-pixels is used to display black lines, the second row of sub-pixels is used to display white lines, the third row of sub-pixels is used to display black lines, and the fourth row of sub-pixels is used to display white lines. The grayscale corresponding to the data signal of the first row of sub-pixels is 255, the grayscale corresponding to the data signal of the second row of sub-pixels is 0, the grayscale corresponding to the data signal of the third row of sub-pixels is 255, and the grayscale corresponding to the data signal of the fourth row of sub-pixels is 0. When the potential of the data signals of two adjacent rows of sub-pixels changes, after the gate scan signal line inputs a turn-off signal, an intermediate grayscale potential is added between the data signals of the two adjacent rows of sub-pixels as a transition data signal and inputted into the data line. For example, the grayscale corresponding to the transition data signal can be 127. Figure 2 In the description, the gate scanning signal line is described as a high-level signal as an example. According to the type of the switching thin film transistor, the shut-down signal may be a high-level signal or a low-level signal.

[0042] Figure 2 In the example shown, the transition data signal includes one sub-transition data signal. The transition data signal may also include multiple sub-transition data signals. This requires a higher data signal switching speed, can reduce the jump of the data signal sensed by the display electrode, reduce the instantaneous current, reduce the potential fluctuation of the display electrode, and reduce the display noise intensity. The transition data signal may include m sub-transition data signals in sequence, where m is an integer greater than 1, and the potential of the kth sub-transition data signal is greater than the potential of the k+1th sub-transition data signal; or, the potential of the k+1th sub-transition data signal is greater than the potential of the kth sub-transition data signal; k is an integer less than m and greater than or equal to 1. For example, when the potential of the first data signal is greater than the potential of the second data signal, the potentials of the m sub-transition data signals included in the transition data signal gradually decrease in a step-like manner; when the potential of the first data signal is less than the potential of the second data signal, the potentials of the m sub-transition data signals included in the transition data signal gradually increase in a step-like manner. The potential difference between adjacent sub-transition data signals can be determined by the difference between the first potential and the second potential and the value of m. For example, the potential difference between adjacent sub-transition data signals is equal to (the difference between the first potential and the second potential) / m.

[0043] In a specific example, Figure 3As shown, when the display module displays black and white lines, the first row of sub-pixels is used to display black lines, the second row of sub-pixels is used to display white lines, the third row of sub-pixels is used to display black lines, and the fourth row of sub-pixels is used to display white lines. The grayscale corresponding to the data signal of the first row of sub-pixels is 255, the grayscale corresponding to the data signal of the second row of sub-pixels is 0, the grayscale corresponding to the data signal of the third row of sub-pixels is 255, and the grayscale corresponding to the data signal of the fourth row of sub-pixels is 0. When the potential of the data signals of two adjacent rows of sub-pixels changes, after the gate scan signal line inputs a turn-off signal, a plurality of intermediate grayscale potentials are added between the data signals of the two adjacent rows of sub-pixels as sub-transition data signals and input into the data line. The grayscales corresponding to the plurality of intermediate grayscale potentials can be 64, 127, and 191. Figure 3 In the description, the gate scanning signal line is described as a high-level signal as an example. According to the type of the switching thin film transistor, the shut-down signal may be a high-level signal or a low-level signal.

[0044] The setting of voltage loading does not need to consider the rising or falling edge time limit caused by the lead load. The driving circuit controls the data signal to perform rapid multi-level conversion within the gate scan signal off time. Preferably, the change time of each level is equally divided, that is, the duration of each sub-transition data signal is equal, and the data voltage change steps change evenly.

[0045] In some embodiments, the potential of the transitional data signal can vary linearly between the first potential and the second potential. For example, when the potential of the first data signal is greater than the potential of the second data signal, the potential of the transitional data signal decreases linearly; when the potential of the first data signal is less than the potential of the second data signal, the potential of the transitional data signal increases linearly. The voltage rise and fall time widths can be set, and the voltage changes linearly within the rise and fall time.

[0046] In a specific example, Figure 4 As shown, when the display module displays black and white lines, the first row of sub-pixels is used to display black lines, the second row of sub-pixels is used to display white lines, the third row of sub-pixels is used to display black lines, and the fourth row of sub-pixels is used to display white lines. The grayscale corresponding to the data signal of the first row of sub-pixels is 255, the grayscale corresponding to the data signal of the second row of sub-pixels is 0, the grayscale corresponding to the data signal of the third row of sub-pixels is 255, and the grayscale corresponding to the data signal of the fourth row of sub-pixels is 0. When the potential of the data signals of two adjacent rows of sub-pixels changes, after the gate scanning signal line inputs a shutdown signal, a transition data signal with a linear potential change is added between the data signals of the two adjacent rows of sub-pixels and inputted into the data line. Figure 4 In the description, the gate scanning signal line is described as a high-level signal as an example. According to the type of the switching thin film transistor, the shut-down signal may be a high-level signal or a low-level signal.

[0047] When the display screen refresh rate is high or the number of display rows is large, the display time period allocated to each row is further reduced. If transition data signals are still added between the data signals of sub-pixels in different rows, the charging and discharging time will be insufficient, and the data signal will not be able to reach the target voltage before the gate scan signal line inputs the turn-on signal. Therefore, the sub-pixels can be divided into multiple groups, and multiple groups of data lines and multiple groups of gate scan signals can be provided. One group of gate scan signal lines is electrically connected to n rows of sub-pixels; one column of sub-pixels is electrically connected to one group of data lines; and one column of sub-pixels includes multiple groups of sub-pixels, each group of sub-pixels includes n sub-pixels, and the n sub-pixels are respectively electrically connected to n data lines of the group of data lines electrically connected to the sub-pixels in that column.

[0048] For example, when the value of n is 2, the ath subpixel is either an even-row subpixel or an odd-row subpixel in each group of subpixels. Odd-row subpixels and even-row subpixels can be controlled separately using gate scan signal lines and data lines. For example, during the transition period between the display periods of two adjacent odd-row subpixels, a transition data signal is input to the data line corresponding to the odd-row subpixel, and a shutdown signal is input to the gate scan signal lines corresponding to the two adjacent odd-row subpixels. The transition data signal may include multiple sub-transition data signals with different potentials, or may also vary linearly in potential. During the transition period between the display periods of two adjacent even-row subpixels, a transition data signal is input to the data line corresponding to the even-row subpixel, and a shutdown signal is input to the gate scan signal lines corresponding to the two adjacent even-row subpixels. The transition data signal may include multiple sub-transition data signals with different potentials, or may also vary linearly in potential. This can address the issue of insufficient time due to an increase in the number of rows or an increase in the display refresh rate.

[0049] In a specific example, Figure 5As shown, when the display module displays black and white rows, the first row of odd-numbered sub-pixels are used to display black rows, the second row of odd-numbered sub-pixels are used to display white rows, the third row of odd-numbered sub-pixels are used to display black rows, and the fourth row of odd-numbered sub-pixels are used to display white rows. The grayscale corresponding to the data signal of the first row of odd-numbered sub-pixels is 255, the grayscale corresponding to the data signal of the second row of odd-numbered sub-pixels is 0, the grayscale corresponding to the data signal of the third row of odd-numbered sub-pixels is 255, and the grayscale corresponding to the data signal of the fourth row of odd-numbered sub-pixels is 0. When the potential of the data signals of the two adjacent rows of odd-numbered sub-pixels changes, after the gate scan signal line inputs a shutdown signal, a transition data signal with a linear potential change is added between the data signals of the two adjacent rows of odd-numbered sub-pixels and inputted into the data line. The first row of even-numbered sub-pixels are used to display black rows, the second row of even-numbered sub-pixels are used to display white rows, the third row of even-numbered sub-pixels are used to display black rows, and the fourth row of even-numbered sub-pixels are used to display white rows. The grayscale corresponding to the data signal of the first row of even-numbered sub-pixels is 255, the grayscale corresponding to the data signal of the second row of even-numbered sub-pixels is 0, the grayscale corresponding to the data signal of the third row of even-numbered sub-pixels is 255, and the grayscale corresponding to the data signal of the fourth row of even-numbered sub-pixels is 0. When the potential of the data signals of the two adjacent rows of even-numbered sub-pixels changes, after the gate scan signal line inputs a shutdown signal, a transition data signal with a linear potential change is added between the data signals of the two adjacent rows of even-numbered sub-pixels and inputs the data line. Figure 5 In the description, the shutdown signal is taken as a high-level signal as an example. Depending on the type of the switching thin film transistor, the shutdown signal can be a high-level signal or a low-level signal.

[0050] Since the display module does not display during the transition period, in order to reduce the impact on the display screen, the transition period corresponding to the even-numbered row sub-pixels and the transition period corresponding to the odd-numbered row sub-pixels may not overlap at all, or may partially overlap. In this way, the time when the odd-numbered row sub-pixels and the even-numbered row sub-pixels are not displayed will not be too long, which can reduce the impact on the display screen.

[0051] In this embodiment, the value of n can also be a number greater than 2, such as 3. The gate scan signal line and the data line can respectively control the display of the sub-pixels in the 3b-2th row, the sub-pixels in the 3b-1th row, and the sub-pixels in the 3bth row, where b is an integer greater than 0. The driving process of this embodiment refers to the embodiment in which n is equal to 2 and is not repeated here.

[0052] It is worth noting that the technical solution of this embodiment is aimed at the situation where the data signals of two adjacent a-th sub-pixels change. If the data signals of two adjacent a-th sub-pixels do not change, there is no need to set a transition time period, nor is there a need to input a transition data signal within the transition time period.

[0053] An embodiment of the present invention further provides a driving circuit for a display module, wherein the display module includes a plurality of sub-pixels arranged in an array, a plurality of groups of gate scanning signal lines, and a plurality of groups of data lines, wherein a group of gate scanning signal lines is electrically connected to n rows of sub-pixels; a column of sub-pixels is electrically connected to a group of data lines; a column of sub-pixels includes a plurality of groups of sub-pixels, each group of sub-pixels includes n sub-pixels, and the n sub-pixels are respectively electrically connected to n data lines of a group of data lines electrically connected to the sub-pixels in the column, where n is a positive integer. The driving circuit includes:

[0054] A driving module is used to input a transition data signal to the data line corresponding to the ath sub-pixel of each group of sub-pixels, and input a shutdown signal to the gate scan signal line corresponding to the two adjacent ath sub-pixels, for a transition time period between the display time periods of two adjacent ath sub-pixels. The potential of the transition data signal is less than a first potential and greater than a second potential, the first potential is the maximum value of the data signals of the two adjacent ath sub-pixels in the display time period, and the second potential is the minimum value of the data signals of the two adjacent ath sub-pixels in the display time period, and a is a positive integer less than or equal to n.

[0055] In this embodiment, through data signal processing, a transition data signal is input to the data line in the transition time period between the display time periods of two adjacent groups of sub-pixels. The potential of the transition data signal is less than the first potential and greater than the second potential, so that the switching of different grayscale potentials between different groups of sub-pixels is smoother, which can reduce the impact of the data signal on the voltage on the display electrode, reduce the fluctuation amplitude of the voltage on the display electrode, further reduce the impact on the touch electrode signal, reduce display noise from the display end, and improve the active pen signal-to-noise ratio, thereby allowing the active pen to work at a lower driving voltage and achieve a longer battery life.

[0056] In this embodiment, n can take a value of 1, a value of 2, or a value of 3 or a larger value. That is, each group of sub-pixels can include 1 sub-pixel, 2 sub-pixels, or more sub-pixels. The a-th sub-pixel in each group can be the 1st sub-pixel, or the 2nd sub-pixel, or the 3rd sub-pixel, etc. in each group of sub-pixels. For example, when n takes a value of 2, each group of sub-pixels includes 2 sub-pixels, and the a-th sub-pixel can be the 1st sub-pixel or the 2nd sub-pixel in each group of sub-pixels; when n takes a value of 3, each group of sub-pixels includes 3 sub-pixels, and the a-th sub-pixel can be the 1st sub-pixel, the 2nd sub-pixel, or the 3rd sub-pixel in each group of sub-pixels, and so on.

[0057] When n takes the value of 1, a group of gate scanning signal lines includes a gate scanning signal line, and a gate scanning signal line is electrically connected to a row of sub-pixels; a group of data lines includes a data line, and a data line is electrically connected to a column of sub-pixels. In a column of sub-pixels, during the display period of the p-th sub-pixel, a first data signal is input to the data line corresponding to the sub-pixels in the column, and during the display period of the p+1-th sub-pixel, a second data signal is input to the data line corresponding to the sub-pixels in the column. The potential of the data signal with a larger potential between the first data signal and the second data signal is the first potential, and the potential of the data signal with a smaller potential between the first data signal and the second data signal is the second potential. The potential difference between the first data signal and the second data signal may be relatively large, for example, when displaying Figure 1 In the black and white line picture shown, the grayscale corresponding to the first data signal is 0, and the grayscale corresponding to the second data signal is 255; or, the grayscale corresponding to the second data signal is 0, and the grayscale corresponding to the first data signal is 255. At this time, the jump between the data signals will affect the display electrode, and then affect the touch electrode, causing the touch signal to be affected by the display noise.

[0058] To reduce display noise, in this embodiment, for each column of sub-pixels, a transition period is inserted between the display periods of two adjacent sub-pixels. During this transition period, the sub-pixels do not display, thus having no impact on the image actually displayed by the display module. During this transition period, a transition data signal is input to the data line corresponding to the sub-pixels in that column. The potential of the transition data signal lies between the potentials of the first data signal and the second data signal. This allows for smoother switching between different grayscale potentials between adjacent sub-pixels, reduces the impact of the data signal on the voltage on the display electrode, reduces the fluctuation amplitude of the voltage on the display electrode, and further reduces the impact on the touch electrode signal, thereby reducing display noise at the display end.

[0059] The duration of the transition period depends on the screen resolution, refresh rate, data line load, and the response speed and / or drive capability of the gate drive circuit. Based on screen parameter requirements, the actual display time can be compressed to the minimum required for normal display, with the remaining time allocated to the transition period. This allows the display electrodes to recover from potential fluctuations caused by the coupled signal before being affected by the subsequent data line signal transition.

[0060] In some embodiments, the transition data signal includes at least one sub-transition data signal, and a potential of each of the sub-transition data signals is smaller than a first potential and larger than a second potential.

[0061] The potential of the sub-transition data signal can be determined based on the first potential and the second potential. For example, the transition data signal includes only one sub-transition data signal, and the potential of the sub-transition data signal can be an intermediate value between the first potential and the second potential. Of course, the potential of the sub-transition data signal can also be slightly larger or smaller than the intermediate value. In a specific example, Figure 2 As shown, when the display module displays black and white lines, the first row of sub-pixels is used to display black lines, the second row of sub-pixels is used to display white lines, the third row of sub-pixels is used to display black lines, and the fourth row of sub-pixels is used to display white lines. The grayscale corresponding to the data signal of the first row of sub-pixels is 255, the grayscale corresponding to the data signal of the second row of sub-pixels is 0, the grayscale corresponding to the data signal of the third row of sub-pixels is 255, and the grayscale corresponding to the data signal of the fourth row of sub-pixels is 0. When the potential of the data signals of two adjacent rows of sub-pixels changes, after the gate scan signal line inputs a turn-off signal, an intermediate grayscale potential is added between the data signals of the two adjacent rows of sub-pixels as a transition data signal and inputted into the data line. For example, the grayscale corresponding to the transition data signal can be 127. Figure 2 In the description, the gate scanning signal line is described as a high-level signal as an example. According to the type of the switching thin film transistor, the shut-down signal may be a high-level signal or a low-level signal.

[0062] Figure 2 In the example shown, the transition data signal includes one sub-transition data signal. The transition data signal may also include multiple sub-transition data signals. This requires a higher data signal switching speed, can reduce the jump of the data signal sensed by the display electrode, reduce the instantaneous current, reduce the potential fluctuation of the display electrode, and reduce the display noise intensity. The transition data signal may include m sub-transition data signals in sequence, where m is an integer greater than 1, and the potential of the kth sub-transition data signal is greater than the potential of the k+1th sub-transition data signal; or, the potential of the k+1th sub-transition data signal is greater than the potential of the kth sub-transition data signal; k is an integer less than m and greater than or equal to 1. For example, when the potential of the first data signal is greater than the potential of the second data signal, the potentials of the m sub-transition data signals included in the transition data signal gradually decrease in a step-like manner; when the potential of the first data signal is less than the potential of the second data signal, the potentials of the m sub-transition data signals included in the transition data signal gradually increase in a step-like manner. The potential difference between adjacent sub-transition data signals can be determined by the difference between the first potential and the second potential and the value of m. For example, the potential difference between adjacent sub-transition data signals is equal to (the difference between the first potential and the second potential) / m.

[0063] In a specific example, Figure 3As shown, when the display module displays black and white lines, the first row of sub-pixels is used to display black lines, the second row of sub-pixels is used to display white lines, the third row of sub-pixels is used to display black lines, and the fourth row of sub-pixels is used to display white lines. The grayscale corresponding to the data signal of the first row of sub-pixels is 255, the grayscale corresponding to the data signal of the second row of sub-pixels is 0, the grayscale corresponding to the data signal of the third row of sub-pixels is 255, and the grayscale corresponding to the data signal of the fourth row of sub-pixels is 0. When the potential of the data signals of two adjacent rows of sub-pixels changes, after the gate scan signal line inputs a turn-off signal, a plurality of intermediate grayscale potentials are added between the data signals of the two adjacent rows of sub-pixels as sub-transition data signals and input into the data line. The grayscales corresponding to the plurality of intermediate grayscale potentials can be 64, 127, and 191. Figure 3 In the description, the gate scanning signal line is described as a high-level signal as an example. According to the type of the switching thin film transistor, the shut-down signal may be a high-level signal or a low-level signal.

[0064] The setting of voltage loading does not need to consider the rising or falling edge time limit caused by the lead load. The driving circuit controls the data signal to perform rapid multi-level conversion within the gate scan signal off time. Preferably, the change time of each level is equally divided, that is, the duration of each sub-transition data signal is equal, and the data voltage change steps change evenly.

[0065] In some embodiments, the potential of the transitional data signal can vary linearly between the first potential and the second potential. For example, when the potential of the first data signal is greater than the potential of the second data signal, the potential of the transitional data signal decreases linearly; when the potential of the first data signal is less than the potential of the second data signal, the potential of the transitional data signal increases linearly. The voltage rise and fall time widths can be set, and the voltage changes linearly within the rise and fall time.

[0066] In a specific example, Figure 4 As shown, when the display module displays black and white lines, the first row of sub-pixels is used to display black lines, the second row of sub-pixels is used to display white lines, the third row of sub-pixels is used to display black lines, and the fourth row of sub-pixels is used to display white lines. The grayscale corresponding to the data signal of the first row of sub-pixels is 255, the grayscale corresponding to the data signal of the second row of sub-pixels is 0, the grayscale corresponding to the data signal of the third row of sub-pixels is 255, and the grayscale corresponding to the data signal of the fourth row of sub-pixels is 0. When the potential of the data signals of two adjacent rows of sub-pixels changes, after the gate scanning signal line inputs a shutdown signal, a transition data signal with a linear potential change is added between the data signals of the two adjacent rows of sub-pixels and inputted into the data line. Figure 4 In the description, the gate scanning signal line is described as a high-level signal as an example. According to the type of the switching thin film transistor, the shut-down signal may be a high-level signal or a low-level signal.

[0067] When the display screen refresh rate is high or the number of display rows is large, the display time period allocated to each row is further reduced. If transition data signals are still added between the data signals of sub-pixels in different rows, the charging and discharging time will be insufficient, and the data signal will not be able to reach the target voltage before the gate scan signal line inputs the turn-on signal. Therefore, the sub-pixels can be divided into multiple groups, and multiple groups of data lines and multiple groups of gate scan signals can be provided. One group of gate scan signal lines is electrically connected to n rows of sub-pixels; one column of sub-pixels is electrically connected to one group of data lines; and one column of sub-pixels includes multiple groups of sub-pixels, each group of sub-pixels includes n sub-pixels, and the n sub-pixels are respectively electrically connected to n data lines of the group of data lines electrically connected to the sub-pixels in that column.

[0068] For example, when the value of n is 2, the ath subpixel is either an even-row subpixel or an odd-row subpixel in each group of subpixels. Odd-row subpixels and even-row subpixels can be controlled separately using gate scan signal lines and data lines. For example, during the transition period between the display periods of two adjacent odd-row subpixels, a transition data signal is input to the data line corresponding to the odd-row subpixel, and a shutdown signal is input to the gate scan signal lines corresponding to the two adjacent odd-row subpixels. The transition data signal may include multiple sub-transition data signals with different potentials, or may also vary linearly in potential. During the transition period between the display periods of two adjacent even-row subpixels, a transition data signal is input to the data line corresponding to the even-row subpixel, and a shutdown signal is input to the gate scan signal lines corresponding to the two adjacent even-row subpixels. The transition data signal may include multiple sub-transition data signals with different potentials, or may also vary linearly in potential. This can address the issue of insufficient time due to an increase in the number of rows or an increase in the display refresh rate.

[0069] In a specific example, Figure 5As shown, when the display module displays black and white rows, the first row of odd-numbered sub-pixels are used to display black rows, the second row of odd-numbered sub-pixels are used to display white rows, the third row of odd-numbered sub-pixels are used to display black rows, and the fourth row of odd-numbered sub-pixels are used to display white rows. The grayscale corresponding to the data signal of the first row of odd-numbered sub-pixels is 255, the grayscale corresponding to the data signal of the second row of odd-numbered sub-pixels is 0, the grayscale corresponding to the data signal of the third row of odd-numbered sub-pixels is 255, and the grayscale corresponding to the data signal of the fourth row of odd-numbered sub-pixels is 0. When the potential of the data signals of the two adjacent rows of odd-numbered sub-pixels changes, after the gate scan signal line inputs a shutdown signal, a transition data signal with a linear potential change is added between the data signals of the two adjacent rows of odd-numbered sub-pixels and inputted into the data line. The first row of even-numbered sub-pixels are used to display black rows, the second row of even-numbered sub-pixels are used to display white rows, the third row of even-numbered sub-pixels are used to display black rows, and the fourth row of even-numbered sub-pixels are used to display white rows. The grayscale corresponding to the data signal of the first row of even-numbered sub-pixels is 255, the grayscale corresponding to the data signal of the second row of even-numbered sub-pixels is 0, the grayscale corresponding to the data signal of the third row of even-numbered sub-pixels is 255, and the grayscale corresponding to the data signal of the fourth row of even-numbered sub-pixels is 0. When the potential of the data signals of the two adjacent rows of even-numbered sub-pixels changes, after the gate scan signal line inputs a shutdown signal, a transition data signal with a linear potential change is added between the data signals of the two adjacent rows of even-numbered sub-pixels and inputs the data line. Figure 5 In the description, the shutdown signal is taken as a high-level signal as an example. Depending on the type of the switching thin film transistor, the shutdown signal can be a high-level signal or a low-level signal.

[0070] Since the display module does not display during the transition period, in order to reduce the impact on the display screen, the transition period corresponding to the even-numbered row sub-pixels and the transition period corresponding to the odd-numbered row sub-pixels may not overlap at all, or may partially overlap. In this way, the time when the odd-numbered row sub-pixels and the even-numbered row sub-pixels are not displayed will not be too long, which can reduce the impact on the display screen.

[0071] In this embodiment, the value of n can also be a number greater than 2, such as 3. The gate scan signal line and the data line can respectively control the display of the sub-pixels in the 3b-2th row, the sub-pixels in the 3b-1th row, and the sub-pixels in the 3bth row, where b is an integer greater than 0. The driving process of this embodiment refers to the embodiment in which n is equal to 2 and is not repeated here.

[0072] It is worth noting that the technical solution of this embodiment is aimed at the situation where the data signals of two adjacent a-th sub-pixels change. If the data signals of two adjacent a-th sub-pixels do not change, there is no need to set a transition time period, nor is there a need to input a transition data signal within the transition time period.

[0073] An embodiment of the present invention further provides a display device comprising a display module and a touch module, and further comprising the driving circuit of the display module as described above. The display device of this embodiment can reduce the display noise of the display module to the touch module.

[0074] The display device includes, but is not limited to, components such as a radio frequency unit, a network module, an audio output unit, an input unit, a sensor, a display unit, a user input unit, an interface unit, a memory, a processor, and a power supply. Those skilled in the art will appreciate that the structure of the above-mentioned display device does not limit the display device, and the display device may include more or fewer of the above-mentioned components, or a combination of certain components, or a different arrangement of components. In embodiments of the present invention, the display device includes, but is not limited to, a monitor, a mobile phone, a tablet computer, a television, a wearable electronic device, a navigation display device, and the like.

[0075] The display device can be any product or component with a display function, such as a television, a monitor, a digital photo frame, a mobile phone, a tablet computer, etc., wherein the display device also includes a flexible circuit board, a printed circuit board and a backplane.

[0076] It should be noted that the various embodiments in this specification are described in a progressive manner. Similar parts between the various embodiments can be referred to in conjunction with each other. Each embodiment focuses on the differences from other embodiments. In particular, since the embodiments are generally similar to the product embodiments, the description is relatively simple. For relevant parts, refer to the partial description of the product embodiments.

[0077] Unless otherwise defined, the technical or scientific terms used in this disclosure should have the usual meanings understood by persons of ordinary skill in the field to which this disclosure belongs. The words "first", "second" and similar terms used in this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0078] It will be understood that when an element such as a layer, film, region, or substrate is referred to as being “on” or “under” another element, it can be “directly on” or “under” the other element or intervening elements may be present.

[0079] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0080] The above description is merely a specific embodiment of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this disclosure should be included in the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be based on the scope of protection of the claims.

Claims

1. A method for driving a display module, characterized in that: The display module includes a plurality of sub-pixels arranged in an array, a plurality of groups of gate scanning signal lines, and a plurality of groups of data lines, wherein a group of gate scanning signal lines is electrically connected to n rows of sub-pixels; a column of sub-pixels is electrically connected to a group of data lines; a column of sub-pixels includes a plurality of groups of sub-pixels, each group of sub-pixels includes n sub-pixels, and the n sub-pixels are respectively electrically connected to n data lines of a group of data lines electrically connected to the sub-pixels in the column, where n is a positive integer. The driving method includes: For an ath sub-pixel in each group of sub-pixels, during a transition period between display periods of two adjacent ath sub-pixels, a transition data signal is input to a data line corresponding to the ath sub-pixel, and an off signal is input to gate scan signal lines corresponding to the two adjacent ath sub-pixels, wherein a is a positive integer less than or equal to n; The transition time period corresponding to the sub-pixels in the even-numbered rows and the transition time period corresponding to the sub-pixels in the odd-numbered rows at least partially do not overlap.

2. The method for driving a display module according to claim 1, wherein: n is equal to 1 or 2.

3. The method for driving a display module according to claim 2, wherein: When n is equal to 2, the ath sub-pixel is a sub-pixel in an even-numbered row or a sub-pixel in an odd-numbered row in each group of sub-pixels.

4. The method for driving a display module according to claim 3, wherein: The transition time period corresponding to the sub-pixels in the even-numbered rows does not overlap with the transition time period corresponding to the sub-pixels in the odd-numbered rows.

5. The method for driving a display module according to any one of claims 1 to 4, wherein: The transition data signal includes at least one sub-transition data signal, and potentials of the sub-transition data signal are all lower than the first potential and higher than the second potential.

6. The method for driving a display module according to claim 5, wherein: The transition data signal includes m sub-transition data signals in sequence, where m is an integer greater than 1, and the potential of the kth sub-transition data signal is greater than the potential of the k+1th sub-transition data signal; or The potential of the k+1th sub-transition data signal is greater than the potential of the kth sub-transition data signal; k is an integer smaller than m and greater than or equal to 1.

7. The method for driving a display module according to any one of claims 1 to 4, wherein: The potential of the transition data signal changes linearly between the first potential and the second potential.

8. A driving circuit for a display module, characterized in that: The display module includes a plurality of sub-pixels arranged in an array, a plurality of groups of gate scanning signal lines, and a plurality of groups of data lines, wherein a group of gate scanning signal lines is electrically connected to n rows of sub-pixels; a column of sub-pixels is electrically connected to a group of data lines; a column of sub-pixels includes a plurality of groups of sub-pixels, each group of sub-pixels includes n sub-pixels, and the n sub-pixels are respectively electrically connected to n data lines of a group of data lines electrically connected to the sub-pixels in the column, where n is a positive integer. The driving circuit includes: a driving module, configured to, for an ath sub-pixel in each group of sub-pixels, input a transition data signal to a data line corresponding to the ath sub-pixel, and input an off signal to a gate scan signal line corresponding to the two adjacent ath sub-pixels, during a transition period between display periods of two adjacent ath sub-pixels, wherein a is a positive integer less than or equal to n; The transition time period corresponding to the sub-pixels in the even-numbered rows and the transition time period corresponding to the sub-pixels in the odd-numbered rows at least partially do not overlap.

9. The driving circuit of the display module according to claim 8, wherein: n is equal to 1 or 2.

10. The driving circuit of the display module according to claim 9, wherein: When n is equal to 2, the ath sub-pixel is a sub-pixel in an even-numbered row or a sub-pixel in an odd-numbered row in each group of sub-pixels.

11. A display device, characterized in that: The device comprises a display module and a touch module, and further comprises a driving circuit for the display module according to any one of claims 8 to 10.

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