Driving method, driving device and display device of display panel

Abstract

This application relates to a driving method, driving device, and display device for a display panel. The driving method for the display panel includes: in each frame display cycle, outputting a corresponding scanning signal to each scan line to drive each row of pixel units line by line. The voltage of the waveform of the scanning signal first rises from a preset low voltage to a preset high voltage, and then falls from the preset high voltage to a preset low voltage. The difference between the preset high voltage and the preset low voltage of the scanning signal corresponding to each scan line gradually increases along a second direction, thereby compensating for scanning signals with long transmission distances to solve the problem of insufficient charging rate of pixel units at far ends in the display panel. This improves the charging uniformity of pixel units in the display panel and enhances the display effect of the display panel.

Description

[Technical Field]

[0001] This application relates to the field of display technology, specifically to a driving method, driving device, and display device for a display panel. [Background Technology]

[0002] With the rapid development of display technology, display panels are increasingly moving towards higher integration and lower costs. Among them, Gate Driver on Array (GOA) technology integrates the TFT (Thin Film Transistor) gate driving circuit on the array substrate of the display panel to form a scanning drive for the display panel. This eliminates the wiring space required for the bonding area and fan-out area of ​​the integrated circuit (IC), which not only reduces product costs in terms of both material costs and manufacturing processes, but also enables the display panel to achieve a symmetrical design with narrow bezels.

[0003] As product size, refresh rate, and resolution continue to increase, the severe RC Delay (resistor-capacitor delay) problem within the display panel causes the waveform of the scanning signal to be continuously delayed and attenuated. This results in a delay in remote charging, leading to insufficient remote charging rate and affecting the display panel's display effect. [Summary of the Invention]

[0004] This application provides a driving method, driving device, and display device for a display panel to solve the problem of insufficient far-end charging rate in the prior art, thereby improving the charging uniformity of pixels in the display panel and improving the display effect of the display panel.

[0005] To address the aforementioned issues, this application provides a driving method for a display panel. The display panel includes multiple scan lines extending along a first direction, multiple data lines extending along a second direction, and multiple pixel units arranged in rows and columns, defined by the intersection of the scan lines and data lines, with each row of pixel units corresponding to one scan line. The driving method includes: in each frame display cycle, outputting a corresponding scan signal to each scan line to drive each row of pixel units sequentially; the voltage of the scan signal waveform first rises from a preset low voltage to a preset high voltage, then falls from the preset high voltage to a preset low voltage, and the difference between the preset high voltage and the preset low voltage of the scan signal corresponding to each scan line gradually increases along the second direction.

[0006] In this system, the preset high voltage of the scan signal corresponding to each scan line is the same, and the preset low voltage of the scan signal corresponding to each scan line gradually decreases along the second direction.

[0007] The preset low voltage of the scan signal corresponding to each scan line is the same, and the preset high voltage of the scan signal corresponding to each scan line gradually increases along the second direction.

[0008] In this process, the preset high voltage of the scan signal corresponding to each scan line gradually increases along the second direction, and the preset low voltage of the scan signal corresponding to each scan line gradually decreases along the second direction.

[0009] The multiple scan lines are divided into multiple groups along the second direction. Each scan line in each group corresponds to the same scan signal, and the difference between the preset high voltage and the preset low voltage of the scan signal corresponding to each group of scan lines gradually increases along the second direction.

[0010] The number of scan lines included in each group of scan lines gradually decreases along the second direction.

[0011] The display panel also includes a source driver, which is located at one end of multiple data lines and electrically connected to the multiple data lines, with the second direction being the direction away from the source driver.

[0012] To address the aforementioned issues, this application also provides a driving device for a display panel. The display panel includes multiple scan lines extending along a first direction, multiple data lines extending along a second direction, and multiple pixel units arranged in rows and columns, defined by the intersection of the multiple scan lines and the multiple data lines, with each row of pixel units corresponding to one scan line. The driving device includes an output module, configured to output corresponding scan signals to each scan line during each frame display cycle to drive each row of pixel units sequentially. The voltage of the scan signal waveform first rises from a preset low voltage to a preset high voltage, then falls from the preset high voltage to a preset low voltage, and the difference between the preset high voltage and the preset low voltage of the scan signal corresponding to each scan line gradually increases along the second direction.

[0013] In this system, the preset high voltage of the scan signal corresponding to each scan line is the same, and the preset low voltage of the scan signal corresponding to each scan line gradually decreases along the second direction.

[0014] To address the aforementioned issues, this application provides a display device comprising a display panel and a driving device for the display panel, wherein the driving device for the display panel is electrically connected to each scan line of the display panel.

[0015] The beneficial effects of this application are as follows: Unlike the prior art, the driving method, driving device and display device of the display panel provided in this application drive each row of pixel units by outputting corresponding scanning signals to each scan line in each frame display cycle. The voltage of the waveform of the scanning signal first rises from a preset low voltage to a preset high voltage, and then falls from the preset high voltage to a preset low voltage. Moreover, the difference between the preset high voltage and the preset low voltage of the scanning signal corresponding to each scan line gradually increases along the second direction. This can compensate for scanning signals with long transmission distances, solve the problem of insufficient charging rate of pixel units at the far end of the display panel, and thus improve the charging uniformity of pixel units in the display panel, thereby improving the display effect of the display panel. [Attached Image Description]

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram illustrating the changes in the scanning signal that drives the pixels within the display panel during transmission in the prior art;

[0018] Figure 2 This is a schematic diagram of the structure of the display panel provided in an embodiment of this application;

[0019] Figure 3 This is a schematic diagram of the structure of a pixel unit provided in an embodiment of this application;

[0020] Figure 4 This is a schematic diagram of the driving method for the display panel provided in an embodiment of this application;

[0021] Figure 5 This is a schematic diagram of a driving method for a display panel provided in other embodiments;

[0022] Figure 6 This is a schematic diagram of the falling edge of the scan signal provided in an embodiment of this application;

[0023] Figure 7 This is another schematic diagram of the falling edge of the scanning signal provided in the embodiments of this application;

[0024] Figure 8 This is another schematic diagram of the driving method for the display panel provided in the embodiments of this application;

[0025] Figure 9 This is a schematic diagram of the structure of the driving device for the display panel provided in the embodiments of this application;

[0026] Figure 10 This is a schematic diagram of the structure of the display device provided in the embodiments of this application.

Detailed Implementation Methods

[0027] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be particularly noted that the following embodiments are for illustrative purposes only and do not limit the scope of the application. Similarly, the following embodiments are only some, not all, embodiments of the present application, and all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of the present application.

[0028] TFT-LCD (Thin Film Transistor Liquid Crystal Display) and UD (Ultra-High Definition) products have RGB resolutions of 3840×2160 and above. The industry generally adopts a 1D 1G design architecture, requiring 12 source driver ICs for display driving. Based on the 1D 1G design architecture, cost reduction mainly focuses on material costs and manufacturing processes, with limited effectiveness. Therefore, to more effectively reduce product costs and significantly enhance market competitiveness, a TFT-LCD UD product using a Tri-gate design architecture was innovatively developed. Its main highlight is the significant reduction in the number of source drivers to one-third, from 12 to 4, greatly reducing electronic component costs and effectively alleviating pressure on the integrated circuit (IC) supply chain.

[0029] However, for TFT-LCD UD products using the Tri-gate design architecture, the number of scan lines increases dramatically from 2160 to 6480, resulting in insufficient pixel charging time and a very large RC loading, which in turn leads to further deterioration of RC delay.

[0030] And, as Figure 1As shown, the VGH (or gate on voltage) and VGL (or gate off voltage) of the scan signals M1 / M2 used to drive the pixels in the LCD driving circuit are currently fixed voltages. After being sent from the near end close to the source driver to the far end, due to the severe RC delay problem within the display panel, the VGL voltage value of the scan signals M1 / M2 continuously attenuates along the Z direction away from the source driver. For example, if the VGL voltage value set by the power management chip (PWM IC) is -13V, it may attenuate to -10V after reaching the far end. Furthermore, even if the VGL voltage value does not attenuate, the falling edge slope of the scan signals M1 / M2 becomes increasingly smaller due to the continuous delay and attenuation of their waveform. This means the effective charging time for each row of pixels gradually decreases, leading to poor charging uniformity of the display panel. Consequently, heavily loaded images with large RC loading exhibit color shifts, color unevenness, and other image quality issues, affecting the display quality of the panel.

[0031] To address the aforementioned technical problems, embodiments of this application provide a driving method, driving device, and display device for a display panel, which compensates for scanning signals with long transmission distances, thereby solving the problem of insufficient charging rate of pixels at the far end of the display panel. This improves the charging uniformity of pixel units in the display panel and enhances the display effect of the display panel.

[0032] Please see Figures 2 to 4 , Figure 2 This is a schematic diagram of the structure of the display panel provided in an embodiment of this application. Figure 3 This is a schematic diagram of the structure of a pixel unit provided in an embodiment of this application. Figure 4 This is a schematic diagram of a driving method for a display panel provided in an embodiment of this application. For example... Figure 2 As shown, the display panel 10 includes multiple scan lines extending along a first direction X (e.g., m scan lines G1 / G2 / G3 / ...... / Gm-1 / Gm), multiple data lines extending along a second direction Y (e.g., n data lines S1 / S2 / S3 / ...... / Sn-1 / Sn), and multiple pixel units P arranged in rows and columns, defined by the intersection of the multiple scan lines G1 / G2 / G3 / ...... / Gm-1 / Gm and the multiple data lines S1 / S2 / S3 / ...... / Sn-1 / Sn. Each row of pixel units is connected to one scan line G1 / G2 / G3 / ...... / Gm-1 / Gm. Furthermore, the driving method for the display panel 20 may include:

[0033] In each frame display cycle, a corresponding scan signal 20 is output to each scan line G1 / G2 / G3 / ...... / Gm-1 / Gm to drive each row of pixel units line by line. The voltage of the scan signal 20 waveform first rises from a preset low voltage VGL1 / VGL2 / VGL3 / ...... / VGLm-1 / VGLm to a preset high voltage VGH1 / VGH2 / VGH3 / ...... / VGHm-1 / VGHm, and then falls from the preset high voltage VGH1 / VGH2 / VGH3 / ...... / VGHm-1 / VGHm back to the preset low voltage VGL1 / VGL2 / VGL3 / ...... / VGLm-1 / VGLm. Furthermore, the preset high voltage VGH1 / VGH2 / VGH3 / ...... / VGHm-1 / VGHm and the preset low voltage VGL1 / VGL2 / VGL3 / ...... / VGLm-1 / Gm of the scan signal 20 corresponding to each scan line G1 / G2 / G3 / ...... / Gm-1 / Gm are the same as the preset low voltage VGL1 / VGH2 / VGH3 / ...... / VGHm-1 / VGHm. The difference between 1 / VGL2 / VGL3 / ...... / VGLm-1 / VGLm gradually increases along the second direction Y (e.g., gradually increasing in a linear or non-linear manner).

[0034] Specifically, such as Figure 3 As shown, each pixel unit P in the above-mentioned display panel 10 may include a switching thin-film transistor T1, a liquid crystal capacitor C1, and a storage capacitor C2. Each pixel unit P may be controlled by a corresponding scan line 11 and a corresponding data line 12. The gate of the switching thin-film transistor T1 in each pixel unit P is electrically connected to the corresponding scan line 11. The liquid crystal capacitor C1 and the storage capacitor C2 in each pixel unit P are electrically connected to their corresponding data line 12 through the switching thin-film transistor T1.

[0035] In this embodiment, the scan signals 20 corresponding to each scan line G1 / G2 / G3 / ...... / Gm-1 / Gm sequentially drive the switching thin-film transistors T1 of each row of pixel units in the display panel 10 to conduct along the second direction Y. Furthermore, for each scan line G1 / G2 / G3 / ...... / Gm-1 / Gm, when the scan signal 20 corresponding to that scan line G1 / G2 / G3 / ...... / Gm-1 / Gm is at a preset high voltage VGH1 / VGH2 / VGH3 / ...... / VGHm-1 / VGHm, the switching thin-film transistor T1 of the row of pixel units electrically connected to that scan line G1 / G2 / G3 / ...... / Gm-1 / Gm is turned on, so that the pixel voltage input by each data line S1 / S2 / S3 / ...... / Sn-1 / Sn can charge the storage capacitor C2 of that row of pixel units.

[0036] For each scan line G1 / G2 / G3 / ...... / Gm-1 / Gm, when the scan signal 20 corresponding to the scan line G1 / G2 / G3 / ...... / Gm-1 / Gm is at a preset low voltage VGL1 / VGL2 / VGL3 / ...... / VGLm-1 / VGLm, the switching thin-film transistor T1 of the row pixel unit electrically connected to the scan line G1 / G2 / G3 / ...... / Gm-1 / Gm is turned off, and the pixel voltage input by each data line S1 / S2 / S3 / ...... / Sn-1 / Sn no longer charges the storage capacitor C2 of the row pixel unit.

[0037] Furthermore, compared to Figure 5 In the driving method shown, a scheme that outputs scan signals 20' with the same high voltage and the same low voltage to each scan line G1 / G2 / G3 / ...... / Gm-1 / Gm to drive each row of pixel units line by line has the following problems: During the transmission of the scan signals 20' to the scan lines G1 / G2 / G3 / ...... / Gm-1 / Gm in the display panel 10 along the second direction Y, due to the RC delay problem in the display panel 10, the falling edge slope of the waveform of the scan signals 20' will become smaller, and the falling edge slope of the scan signals 20' with a longer transmission distance will become smaller than that of the scan signals 20' with a shorter transmission distance. As a result, the effective charging time of each row of pixel units will gradually decrease along the second direction Y, which in turn causes the display screen of the display panel 10 to exhibit color shift and color unevenness. In this embodiment, each scan line G1 / G2 / G3 / ...... / Gm-1 / Gm outputs a corresponding scan signal 20. Furthermore, the difference between the preset high voltage VGH1 / VGH2 / VGH3 / ...... / VGHm-1 / VGHm and the preset low voltage VGL1 / VGL2 / VGL3 / ...... / VGLm-1 / VGLm of the scan signal 20 with a long transmission distance is greater than the difference between the preset high voltage VGH1 / VGH2 / VGH3 / ...... / VGHm-1 / VGHm and the preset low voltage VGL1 / VGL2 / VGL3 / ...... / VGLm-1 / VGLm of the scan signal 20 with a short transmission distance. This ensures that, even with severe RC delay issues within the display panel 10, the falling edge slope of the scan signal 20 transmitted to each scan line G1 / G2 / G3 / ...... / Gm-1 / Gm is maximized, thus shortening the time required for the voltage to drop from high to low. This, in turn, allows for better coordination with the Gate... Delay technology is used to maximize the effective charging time of pixels, thereby improving the problem of poor charging uniformity and uneven color in heavy-load images caused by RC delay in the UD Tri-gate architecture.

[0038] Specifically, the principle behind using Gate delay technology to maximize the effective charging time of pixels can be summarized as follows: Figure 5 As shown, for two scan signals 21 / 22 with the same high voltage but different low voltages, when their transmission distances are equal, the falling edge slope of the lower voltage scan signal 22 will be greater than that of the lower voltage scan signal 21. That is, the time required for the scan signal 22 to reach the gate cutoff voltage will be less than the time required for the scan signal 21 to reach the gate cutoff voltage. Therefore, as... Figure 6 As shown, when the high voltage duration of scan signal 21 and scan signal 22 is equal, compared to the low voltage high scan signal 21, the falling edge time of the low voltage low scan signal 22 can be shifted backward (for example, shifted backward by Δt) to prolong the high voltage duration of the low voltage low scan signal 22, thereby maximizing the effective charging time of the corresponding pixel and improving the pixel charging rate.

[0039] Furthermore, in specific implementation, in order to determine the preset high voltage VGH1 / VGH2 / VGH3 / ...... / Gm-1 / Gm of the scan signal 20 corresponding to each scan line G1 / G2 / G3 / ...... / Gm-1 / Gm and the preset low voltage VGL1 / VGL2 / VGL3 / ...... / VGLm-1 / VGLm, the display panel 10 can be divided into multiple display blocks along the second direction Y. For example, the display panel 10 can be divided into three equal display blocks along the second direction Y, and a corresponding gate on-voltage level and / or gate off-voltage level can be set for each display block; then, a gate on-voltage level can be set for each display block. Delay debugging is performed to confirm the optimal charging time for each display block and to determine the optimal preset high voltage and / or optimal preset low voltage required to match the scan signal 20 corresponding to the scan line G1 / G2 / G3 / ...... / Gm-1 / Gm located at the boundary position of each display block. Then, the optimal preset high voltage and / or optimal preset low voltage required to match the scan signal 20 corresponding to the scan line G1 / G2 / G3 / ...... / Gm-1 / Gm located at the middle position of each display block can be set by linear interpolation, thereby obtaining the preset high voltage VGH1 / VGH2 / VGH3 / ...... / VGHm-1 / VGHm and preset low voltage VGL1 / VGL2 / VGL3 / ...... / VGLm-1 / VGLm of the scan signal 20 corresponding to each scan line G1 / G2 / G3 / ...... / Gm-1 / Gm.

[0040] In some embodiments, such as Figure 4As shown, in order to achieve a gradual increase in the difference between the preset high voltage VGH1 / VGH2 / VGH3 / ...... / VGHm-1 / VGHm and the preset low voltage VGL1 / VGL2 / VGL3 / ...... / VGLm-1 / VGLm of the scan signal 20 corresponding to each scan line G1 / G2 / G3 / ...... / Gm-1 / Gm along the second direction Y, it can be set that: the preset high voltage VGH1 / VGH2 / VGH3 / ...... / VGHm-1 / VGHm of the scan signal 20 corresponding to each scan line G1 / G2 / G3 / ...... / Gm-1 / Gm is the same (for example, all are fixed voltage VGH0), and the preset low voltage VGL1 / VGL2 / VGL3 / ...... / VGLm-1 / VGLm of the scan signal 20 corresponding to each scan line G1 / G2 / G3 / ...... / Gm-1 / Gm gradually decreases along the second direction Y (for example, gradually decreasing in a linear or non-linear manner). That is, the waveform of the scan signal 20 corresponding to each scan line G1 / G2 / G3 / ...... / Gm-1 / Gm is set to a waveform with a constant high voltage and a gradually decreasing low voltage along the second direction Y.

[0041] In other embodiments, such as Figure 6 As shown, in order to achieve a gradual increase in the difference between the preset high voltage VGH1 / VGH2 / VGH3 / ...... / VGHm-1 / VGHm and the preset low voltage VGL1 / VGL2 / VGL3 / ...... / VGLm-1 / VGLm of the scan signal 20 corresponding to each scan line G1 / G2 / G3 / ...... / Gm-1 / Gm along the second direction Y, it can also be set that: the preset low voltage VGL1 / VGL2 / VGL3 / ...... / VGLm-1 / VGLm of the scan signal 20 corresponding to each scan line G1 / G2 / G3 / ...... / Gm-1 / Gm is the same (for example, all are fixed voltage VGL0), and the preset high voltage VGH1 / VGH2 / VGH3 / ...... / VGHm-1 / VGHm of the scan signal 20 corresponding to each scan line G1 / G2 / G3 / ...... / Gm-1 / Gm gradually increases along the second direction Y (for example, gradually increases in a linear or non-linear manner). That is, the waveform of the scan signal 20 corresponding to each scan line G1 / G2 / G3 / ...... / Gm-1 / Gm is set to a waveform in which the low voltage remains unchanged and the high voltage gradually increases along the second direction Y.

[0042] In other embodiments, in order to achieve a gradual increase in the difference between the preset high voltage VGH1 / VGH2 / VGH3 / ...... / Gm-1 / Gm and the preset low voltage VGL1 / VGL2 / VGL3 / ...... / VGLm-1 / VGLm of the scan signal 20 corresponding to each scan line G1 / G2 / G3 / ...... / Gm-1 / Gm along the second direction Y, the preset high voltage VGH1 / VGH2 / G3 / ...... / Gm-1 / Gm of the scan signal 20 can also be set as follows: The voltage VGL1 / VGL2 / VGL3 / ...... / Gm-1 / Gm gradually increases along the second direction Y (e.g., gradually increasing in a linear or non-linear manner), while the preset low voltage VGL1 / VGL2 / VGL3 / ...... / VGLm-1 / VGLm of the scan signal 20 corresponding to each scan line G1 / G2 / G3 / ...... / Gm-1 / Gm gradually decreases along the second direction Y (e.g., gradually decreasing in a linear or non-linear manner). In other words, the waveform of the scan signal 20 corresponding to each scan line G1 / G2 / G3 / ...... / Gm-1 / Gm is set to a waveform where the high voltage gradually increases and the low voltage gradually decreases along the second direction Y.

[0043] In some specific embodiments, the aforementioned multiple scan lines G1 / G2 / G3 / ...... / Gm-1 / Gm can be divided into multiple groups along the second direction Y, wherein each group of scan lines includes at least one scan line G1 / G2 / G3 / ...... / Gm-1 / Gm. The scan signals 20 corresponding to each scan line G1 / G2 / G3 / ...... / Gm-1 / Gm in each group of scan lines are the same, that is, they have the same preset high voltage VGH1 / VGH2 / VGH3 / ...... / VGHm-1 / VGHm and the same preset low voltage VGL1 / VGL2 / VGL3 / ...... / VGLm-1 / VGLm.

[0044] Specifically, in order to ensure that the difference between the preset high voltage VGH1 / VGH2 / VGH3 / ...... / VGHm-1 / VGHm and the preset low voltage VGL1 / VGL2 / VGL3 / ...... / VGLm-1 / VGLm of the scan signals 20 corresponding to each scan line G1 / G2 / G3 / ...... / Gm-1 / Gm gradually increases along the second direction Y, it can be set that the difference between the preset high voltage VGH1 / VGH2 / VGH3 / ...... / VGHm-1 / VGHm and the preset low voltage VGL1 / VGL2 / VGL3 / ...... / VGLm-1 / VGLm of the scan signals 20 corresponding to each group of scan lines gradually increases along the second direction Y. This reduces the number of different scan signals 20 that need to be generated, thereby reducing the cost of the driving circuit.

[0045] Furthermore, in specific implementation, considering that the difference between the falling edge slopes of the scan signals 20 corresponding to two adjacent scan lines G1 / G2 / G3 / ...... / Gm-1 / Gm will become increasingly significant as the transmission distance of the scan signals 20 increases, the number of scan lines G1 / G2 / G3 / ...... / Gm-1 / Gm included in each group of scan lines can be gradually reduced along the second direction Y mentioned above. This allows for a reduction in the types of scan signals 20 that need to be generated, while more effectively ensuring that the falling edge slopes of the scan signals 20 transmitted to each scan line G1 / G2 / G3 / ...... / Gm-1 / Gm are at their maximum. This further shortens the time required to drop from the preset high voltage to the preset low voltage. In conjunction with Gate delay technology, this can more effectively maximize the effective charging time of the pixel unit while reducing the types of scan signals 20 that need to be generated. This effectively improves the problem of poor charging uniformity and uneven color in heavy-load images caused by RC delay in the UD Tri-gate architecture.

[0046] In the above embodiments, the display panel 10 may further include a source driver located at one end of the plurality of data lines S1 / S2 / S3 / ...... / Sn-1 / Sn and electrically connected to the plurality of data lines S1 / S2 / S3 / ...... / Sn-1 / Sn. Furthermore, the second direction Y may be a direction away from the source driver.

[0047] Specifically, the driving method for the display panel 10 may further include:

[0048] In each frame display cycle, pixel voltages are input to each data line S1 / S2 / S3 / ...... / Sn-1 / Sn.

[0049] As can be seen from the above, the display panel driving method provided in this embodiment outputs corresponding scanning signals to each scan line in each frame display cycle to drive each row of pixel units line by line. The voltage of the scanning signal waveform first rises from a preset low voltage to a preset high voltage, and then falls from a preset high voltage to a preset low voltage. The difference between the preset high voltage and the preset low voltage of the scanning signal corresponding to each scan line gradually increases along the second direction, thereby compensating for scanning signals with long transmission distances, solving the problem of insufficient charging rate of pixel units at the far end of the display panel, and thus improving the charging uniformity of pixel units in the display panel, thereby improving the display effect of the display panel.

[0050] Based on the driving method described in the above embodiments, this embodiment will further describe it from the perspective of the driving device corresponding to the driving method. Please refer to [link / reference]. Figure 9 , Figure 9 This is a schematic diagram of the structure of a driving device for a display panel provided in an embodiment of this application. The display panel includes multiple scan lines extending along a first direction, multiple data lines extending along a second direction, and multiple pixel units arranged in rows and columns, defined by the intersection of the scan lines and data lines. Each row of pixel units is connected to one scan line. Furthermore, the driving device 200 for the display panel includes an input module 201 and an output module 201 for:

[0051] In each frame display cycle, a corresponding scan signal is output to each scan line to drive each row of pixel units line by line. The voltage of the scan signal waveform first rises from a preset low voltage to a preset high voltage, and then falls from a preset high voltage to a preset low voltage. The difference between the preset high voltage and the preset low voltage of the scan signal corresponding to each scan line gradually increases along the second direction.

[0052] In some embodiments, the preset high voltage of the scan signal corresponding to each scan line may be the same, and the preset low voltage of the scan signal corresponding to each scan line may gradually decrease along the second direction.

[0053] In other embodiments, the preset low voltage of the scan signal corresponding to each scan line may be the same, and the preset high voltage of the scan signal corresponding to each scan line may gradually increase along the second direction.

[0054] In other embodiments, the preset high voltage of the scan signal corresponding to each scan line can be gradually increased along the second direction, and the preset low voltage of the scan signal corresponding to each scan line can be gradually decreased along the second direction.

[0055] In some embodiments, the multiple scan lines can be divided into multiple groups along the second direction, and the scan signals corresponding to each scan line in each group are the same, and the difference between the preset high voltage and the preset low voltage of the scan signals corresponding to each group of scan lines can gradually increase along the second direction.

[0056] In some specific embodiments, the number of scan lines included in each group of scan lines may gradually decrease along the second direction.

[0057] In the above embodiments, the display panel may further include a source driver, which is located at one end of the plurality of data lines and electrically connected to the plurality of data lines. Furthermore, the second direction may be a direction away from the source driver.

[0058] It should be noted that the specific implementation of the above-mentioned output module 201 can be found in the previous driving method embodiments, and will not be repeated here.

[0059] As can be seen from the above, the driving device of the display panel provided in this embodiment outputs corresponding scanning signals to each scanning line in each frame display cycle to drive each row of pixel units line by line. The voltage of the waveform of the scanning signal first rises from a preset low voltage to a preset high voltage, and then falls from the preset high voltage to a preset low voltage. Moreover, the difference between the preset high voltage and the preset low voltage of the scanning signal corresponding to each scanning line gradually increases along the second direction. This can compensate for scanning signals with long transmission distances, solve the problem of insufficient charging rate of pixel units at the far end of the display panel, and thus improve the charging uniformity of pixel units in the display panel, thereby improving the display effect of the display panel.

[0060] Please see Figure 10 , Figure 10 This is a schematic diagram of the structure of the display device provided in the embodiments of this application. Figure 10 As shown, the display device 300 includes a display panel 301 and a drive device 302 for the display panel as described above. The drive device 302 for the display panel is electrically connected to each scan line of the display panel 301.

[0061] The display panel 301 includes multiple scan lines extending along a first direction, multiple data lines extending along a second direction, and multiple pixel units arranged in rows and columns, defined by the intersection of the multiple scan lines and the multiple data lines, with each row of pixel units corresponding to one scan line.

[0062] Furthermore, the display panel driving device 300 includes an input module and an output module for: outputting a corresponding scanning signal to each scan line in each frame display cycle to drive each row of pixel units line by line. The voltage of the scanning signal waveform first rises from a preset low voltage to a preset high voltage, and then falls from the preset high voltage to a preset low voltage. The difference between the preset high voltage and the preset low voltage of the scanning signal corresponding to each scan line gradually increases along the second direction.

[0063] It should be noted that the display device in this application embodiment, due to the provision of the liquid crystal display panel provided in this application embodiment, has the same beneficial effects as the liquid crystal display panel described above.

[0064] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A driving method for a display panel, characterized in that, The display panel includes multiple scan lines extending along a first direction, multiple data lines extending along a second direction, and multiple pixel units arranged in rows and columns, defined by the intersection of the multiple scan lines and the multiple data lines, with each row of pixel units corresponding to one scan line; the driving method includes: In each frame display cycle, a corresponding scan signal is output to each scan line to drive each row of pixel units line by line. The voltage of the scan signal waveform first rises from a preset low voltage to a preset high voltage, and then falls from the preset high voltage back to the preset low voltage. The preset low voltage of the scan signal corresponding to each scan line gradually decreases along the second direction, so that the difference between the preset high voltage and the preset low voltage of the scan signal corresponding to each scan line gradually increases along the second direction. Gate delay is used to maximize the effective charging time of each row of pixel units. The gate delay is used to shift the time of the falling edge corresponding to the scan signal with the larger falling edge slope to the back when the preset high voltage in each scan signal is the same, so as to prolong the duration of the preset high voltage corresponding to the scan signal with the larger falling edge slope.

2. The driving method for the display panel according to claim 1, characterized in that, The multiple scan lines are divided into multiple groups along the second direction. The scan signals corresponding to each scan line in each group are the same, and the difference between the preset high voltage and the preset low voltage of the scan signals corresponding to each group of scan lines gradually increases along the second direction.

3. The driving method for the display panel according to claim 2, characterized in that, The number of scan lines included in each group of scan lines gradually decreases along the second direction.

4. The driving method for a display panel according to any one of claims 1-3, characterized in that, The display panel also includes a source driver, which is located at one end of the plurality of data lines and electrically connected to the plurality of data lines, and the second direction is the direction away from the source driver.

5. A driving device for a display panel, characterized in that, The display panel includes multiple scan lines extending along a first direction, multiple data lines extending along a second direction, and multiple pixel units arranged in rows and columns, defined by the intersection of the multiple scan lines and the multiple data lines, with each row of pixel units corresponding to one scan line; the driving device includes: An output module is configured to output corresponding scan signals to each scan line in each frame display cycle to drive each row of pixel units line by line. The voltage of the scan signal waveform first rises from a preset low voltage to a preset high voltage, and then falls from the preset high voltage back to the preset low voltage. The preset low voltage of the scan signal corresponding to each scan line gradually decreases along the second direction, so that the difference between the preset high voltage and the preset low voltage of the scan signal corresponding to each scan line gradually increases along the second direction. A gate delay is used to maximize the effective charging time of each row of pixel units. The gate delay is used to shift the time of the falling edge corresponding to the scan signal with the larger falling edge slope to the back when the preset high voltage in each scan signal is the same, so as to prolong the duration of the preset high voltage corresponding to the scan signal with the larger falling edge slope.

6. A display device, characterized in that, It includes a display panel and a driving device for the display panel as described in claim 5, wherein the driving device for the display panel is electrically connected to each scan line of the display panel.

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