Display driving method and device, display device, and storage medium

Abstract

A display driving method, apparatus, display device and storage medium, the driving method comprising: in a process in which a first source driving module outputs a first data signal to a first refresh area at a first refresh frequency, switching the first source driving module to a second source driving module when the first data signal scans to an n1th pixel row of the first refresh area (S710); in a process in which the second source driving module outputs the first data signal, controlling the second source driving module to switch to output a third data signal to the first refresh area at a third refresh frequency when the first data signal scans to an n2th pixel row of the first refresh area (S720); and after the third data signal scans to an n3th pixel row, controlling the second source driving module to switch to output a second data signal to a second refresh area adjacent to the first refresh area at a second refresh frequency (S730).

Description

Display driving method, apparatus, display device, and storage medium Technical Field

[0001] This disclosure relates to the field of display technology, and in particular to a display driving method, apparatus, display device, and storage medium. Background Technology

[0002] With the development of display technology, partial refresh (HRD) technology has gradually gained attention from various terminal manufacturers. HRD technology allows for relatively free division of display areas on the screen, and different display areas can have different refresh rates, thereby bringing benefits in terms of power consumption.

[0003] In partial refresh scenarios, at display boundaries where the frequency switches from low to high or from high to low, electrical coupling and differences will occur at the boundary due to signal switching, resulting in various display defects such as bright lines, bright bands, dark lines, and dark bands.

[0004] Summary of the Invention

[0005] The purpose of this disclosure is to provide a display driving method, apparatus, display device, and storage medium to solve the display defects caused at display boundary positions with different refresh rates in partial refresh technology.

[0006] To address the aforementioned technical problems, one embodiment of this disclosure provides a display driving method, comprising:

[0007] When the display panel displays the Mth frame image, during the process of the first source drive module outputting the first data signal to the first refresh area at the first refresh frequency, when the first data signal is scanned to the n1th pixel row of the first refresh area, the first source drive module used to output the first data signal is switched to the second source drive module.

[0008] During the process of the second source driver module outputting the first data signal, when the first data signal scans to the n2th pixel row of the first refresh area, the second source driver module is controlled to switch to output the third data signal to the first refresh area at the third refresh frequency.

[0009] After the third data signal is scanned to the n3rd pixel row, the second source drive module is controlled to switch to output the second data signal to the second refresh area adjacent to the first refresh area at the second refresh frequency; wherein M, n1, n2 and n3 are integers greater than or equal to 1.

[0010] Optionally, in the display driving method, where the n3rd pixel row is located within the first refresh area, and the pixel row of the first refresh area near the boundary of the second refresh area is a different pixel row from the n3rd pixel row, before controlling the second source driving module to output a second data signal to the second refresh area at a second refresh frequency, the method further includes:

[0011] The second source drive module is controlled to output the second data signal to the remaining scan area of ​​the first refresh area at the second refresh frequency.

[0012] Optionally, in the display driving method, the signal type of the first data signal is different from the signal type of the third data signal, and the signal type of the third data signal is the same as the signal type of the second data signal.

[0013] Optionally, in the display driving method, the first refresh frequency is less than the second refresh frequency; the first data signal is a DC signal, the second data signal and the third data signal are square wave signals respectively, and the reference voltage of the third data signal is less than the reference voltage of the second data signal.

[0014] Optionally, in the display driving method, when the first refresh rate is less than the second refresh rate, the method further includes:

[0015] After the second data signal is scanned to the n4th pixel row of the second refresh area, the second source drive module is controlled to switch to output the fourth data signal to the third refresh area at the fourth refresh frequency; the n4th pixel row is the pixel row of the second refresh area that is farthest from the first refresh area.

[0016] After the fourth data signal is scanned to the n5th pixel row of the third refresh area, the second source driver module is switched to the first source driver module, and the first source driver module is controlled to output the first data signal to the third refresh area at the first refresh frequency.

[0017] Optionally, in the display driving method, when the first refresh rate is less than the second refresh rate, the method further includes:

[0018] When the second data signal is scanned to the n4th pixel row of the second refresh area, the second source driver module is switched to the first source driver module, and the first source driver module is controlled to output the fourth data signal to the third refresh area at the fourth refresh frequency. After the fourth data signal is scanned to the n5th pixel row of the third refresh area, it is switched to output the first data signal to the third refresh area at the first refresh frequency.

[0019] Wherein, the n4th pixel row is the pixel row that is furthest from the first refresh area in the second refresh area.

[0020] Optionally, in the display driving method, both the fourth data signal and the second data signal are square wave signals, and the reference voltage of the fourth data signal is less than the reference voltage of the second data signal.

[0021] Optionally, in the display driving method, the number of interval rows between the n5th pixel row and the n4th pixel row is related to the input time of the Reset signal of the n4th pixel row.

[0022] Optionally, the display driving method further includes:

[0023] During the process of displaying an image on the display panel, the image is displayed at intervals of W frames, and the boundary pixel rows adjacent to the first refresh area in the second refresh area are adjusted by L pixel rows towards the first refresh area; where W and L are integers greater than or equal to 1.

[0024] Optionally, the display driving method further includes:

[0025] After the boundary pixel row of the second refresh area is adjusted to a preset area on the display panel, the boundary pixel row is returned to the initial position where the boundary pixel row was first adjusted.

[0026] Optionally, in the display driving method, W and / or L take different values ​​during at least two adjustments to the boundary pixel row.

[0027] Optionally, in the display driving method, the n3rd pixel row is located within the first refresh area, and the pixel row of the first refresh area closest to the boundary of the second refresh area is the same pixel row as the n3rd pixel row; or...

[0028] The n3rd pixel row is located within the second refresh area, and the pixel row of the second refresh area that is close to the boundary of the first refresh area is the same pixel row as the n3rd pixel row.

[0029] Optionally, in the display driving method, the number of pixel rows between the n2nd pixel row and the n1st pixel row is greater than or equal to the number of pixel rows between the n3rd pixel row and the n2nd pixel row.

[0030] One embodiment of this disclosure also provides a display driving device, comprising:

[0031] The first control module is used to switch the first source drive module used to output the first data signal to the first refresh area when the first source drive module outputs the first data signal to the first refresh area at the first refresh frequency during the process of the first data signal scanning to the n1th pixel row of the first refresh area.

[0032] The second control module is used to control the second source drive module to switch to outputting a third data signal to the first refresh area at a third refresh frequency when the first data signal is scanned to the n2th pixel row of the first refresh area during the process of the second source drive module outputting the first data signal.

[0033] The third control module is used to control the second source drive module to switch to output the second data signal to the second refresh area adjacent to the first refresh area at the second refresh frequency after the third data signal is scanned to the n3rd pixel row; wherein M, n1, n2 and n3 are integers greater than or equal to 1.

[0034] Optionally, in the display driving method, the n3rd pixel row is located within the first refresh area, and the pixel row of the first refresh area closest to the boundary of the second refresh area is the same pixel row as the n3rd pixel row; or...

[0035] The n3rd pixel row is located within the second refresh area, and the pixel row of the second refresh area that is close to the boundary of the first refresh area is the same pixel row as the n3rd pixel row.

[0036] One embodiment of this disclosure also provides a display device, including a processor, a memory, and a program stored in the memory and executable on the processor, wherein the program, when executed by the processor, implements the display driving method as described in any of the preceding claims.

[0037] One embodiment of this disclosure provides a readable storage medium storing a program that, when executed by a processor, implements the steps of the display driving method as described in any of the preceding claims. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of this disclosure or related technologies, 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 disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 is a schematic diagram of the division structure of the display area of ​​a display panel according to one embodiment of the present disclosure;

[0040] Figure 2 is a schematic diagram of the division structure of the display area of ​​a display panel according to another embodiment of the present disclosure;

[0041] Figure 3 is a schematic diagram of the structure of a display device employing the method of this embodiment;

[0042] Figure 4 is a schematic diagram of the structure of a pixel circuit using the display driving method described in the embodiments of this disclosure;

[0043] Figure 5 is a schematic diagram of the driving timing of the pixel circuit using this implementation structure;

[0044] Figure 6 is a schematic diagram illustrating the generation of voltage jumps;

[0045] Figure 7 is a flowchart illustrating the display driving method according to an embodiment of this disclosure;

[0046] Figure 8 is a schematic diagram of the voltage change when switching from the low-frequency refresh area to the high-frequency refresh area;

[0047] Figure 9 is a schematic diagram of the voltage change when switching from the high-frequency refresh area to the low-frequency refresh area;

[0048] Figure 10 is a timing diagram of the image refresh process;

[0049] Figure 11 is a schematic diagram of the structure of the display driving device according to an embodiment of this disclosure. Detailed Implementation

[0050] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this disclosure, and not all of them. Based on the embodiments of this disclosure, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this disclosure.

[0051] The terms "first," "second," etc., used in this disclosure are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that embodiments of this disclosure can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same class and are not limited in number; for example, a first object can be one or more.

[0052] The display driving method described in this disclosure is, exemplarily, applied to a display panel 100 as shown in FIG. 1 or FIG. 2, which includes multiple display areas, and the multiple display areas can achieve different refresh rates. In one embodiment, as shown in FIG. 1, the display panel 100 includes a first refresh area 1 and a second refresh area 2 arranged sequentially from top to bottom along the pixel column direction. The first refresh area 1 is used to achieve a low refresh rate, such as 1 Hz, and the second refresh area 2 is used to achieve a high refresh rate, such as 120 Hz. In another embodiment, as shown in FIG. 2, compared to the display panel shown in FIG. 1, a third refresh area 3 may be included, arranged on the side of the second refresh area 2 away from the first refresh area 1. Optionally, the third refresh area 3 is used to achieve a low refresh rate. In this embodiment, the display areas of the display panel 100 are formed as a structure in which a low refresh rate area, a high refresh rate area, and a low refresh rate area are arranged sequentially along the pixel column direction. Optionally, the third refresh area 3 is used to achieve a high refresh rate (that is, the refresh rate of the third refresh area 3 is higher than the refresh rate of the second refresh area 2). In this embodiment, the display area of ​​the display panel 100 is formed in a structure in which the refresh rate increases from low to high along the pixel column direction.

[0053] It should be noted that the above-mentioned arrangements of different refresh zones on the display panel are for illustrative purposes only and are not intended to be the only examples.

[0054] Figure 3 shows a schematic diagram of a display device using the display driving method described in this disclosure in one embodiment. Optionally, the display device includes a display panel 100, a source driving circuit 200, and a gate driving circuit 300. The display panel 100 has multiple pixel units arranged in an array. The source driving circuit 200 is connected to the pixel units of multiple pixel columns on the display panel 100, and is used to input voltage signals corresponding to the displayed image data to each pixel column. The gate driving circuit 300 includes multiple cascaded array substrate row driving (GOA) units. The multiple GOA units are connected one-to-one with the pixel units of multiple pixel rows on the display panel 100, and are used to control the multiple pixel rows to scan line by line, lighting up the corresponding pixel rows, realizing the line-by-line scanning and refreshing of the image data input through the source driving circuit 200, enabling the display panel to display the image.

[0055] In some embodiments of this disclosure, optionally, the source drive circuit 200 includes at least two source drive modules, wherein the at least two source drive modules include a first source drive module and a second source drive module. The first source drive module is used for display output in a low refresh rate region, and the second source drive module is used for display output in a high refresh rate region. In some embodiments, optionally, when the first source drive module is used for image display output in a low refresh rate region, it outputs a constant voltage. When the second source drive module is used for image display output in a high refresh rate region, it needs to be able to output a high-low switching voltage, that is, output a square wave voltage. Therefore, the first source drive module does not need to have a high high-low switching voltage precision requirement compared to the second source drive module, and has the advantage of low power consumption.

[0056] In this embodiment of the disclosure, each GOA unit of the gate driving circuit 300 can realize the timing control of the thin film transistor in the pixel unit during image display under the control of clock signal, light emission control signal and reset signal, and satisfy pixel local refresh to realize different refresh frequencies for different display areas.

[0057] Figure 4 is a schematic diagram of a pixel circuit using one of the display driving methods described in this disclosure. Taking an 8T1C pixel driving circuit in a display panel as an example, the pixel circuit includes a first transistor T1, a second transistor T2, a third transistor T3, a fourth transistor T4, a fifth transistor T5, a sixth transistor T6, a seventh transistor T7, and an eighth transistor T8, as well as a capacitor Cst. The second transistor T2 is an NMOS, while the other transistors are PMOS. The third transistor T3 can also be referred to as the driving transistor.

[0058] In some embodiments, optionally, the pixel driving circuit described above can be controlled by inputting five display driving signals, which may include:

[0059] The activation signal EM(n) is used to control the fifth transistor T5 and the sixth transistor T6;

[0060] The first gate scan signal Gate_N(n) is used to control the second transistor T2;

[0061] The second gate scan signal Gate_P(n) is used to control the fourth transistor T4;

[0062] The first reset signal Reset_P(n) is used to control the first transistor T1;

[0063] The second reset signal Reset_H(n) is used to control the seventh transistor T7 and the eighth transistor T8.

[0064] The first gate scan signal Gate_N(n) and the second gate scan signal Gate_P(n) are both used to turn on the pixel driving circuit so as to drive the organic light-emitting diodes of the pixel unit for display according to the data signal Date(n).

[0065] The driving timing of the pixel driving circuit using this implementation structure during the frame refresh phase is shown in Figure 5, including stages ① to ⑤ executed sequentially:

[0066] In stage ①, the input activation signal EM(n) is at a high potential, which correspondingly causes the fifth transistor T5 and the sixth transistor T6 to be cut off or turned off. This, in turn, disconnects the pull-up power supply terminal EVDD (first power supply terminal) and the pull-down power supply terminal EVSS (second power supply terminal), turning off the light emission of the organic light-emitting diode L1.

[0067] In stage ②, the first gate scan signal Gate_N(n) switches from low level (first level) to high level (second level), which correspondingly turns on the second transistor T2; then, the first reset signal Reset_P(n) switches from high level to low level, which turns on the first transistor T1, and the first initial signal Vinit1 is written to nodes N1 and N3 to reset the pixel circuit;

[0068] In stage ③, the first reset signal Reset_P(n) switches from low level to high level, which correspondingly turns off the first transistor T1; then, the second gate scan signal Gate_P(n) switches from high level (second level) to low level (first level), which turns on the fourth transistor T4, and the Data(n) data voltage is written.

[0069] In stage ④, the second gate scan signal Gate_P(n) switches from low to high, turning off the fourth transistor T4; subsequently, the first gate scan signal Gate_N(n) switches from high to low, turning off the second transistor T2; further, the second reset signal Reset_H(n) switches from high to low, turning on the seventh transistor T7 and the eighth transistor T8, the second initial signal Vinit2 is written into the pixel circuit to reset node N4 (anode of the light-emitting device), and the third initial signal Vinit3 is written into N2;

[0070] In stage ⑤, the second reset signal Reset_H(n) switches from low level to high level, turning off the seventh crystal T7 and the eighth transistor T8; subsequently, the activation signal EM(n) switches from high potential to low potential, turning on the fifth transistor T5 and the sixth transistor T6, entering the light-emitting stage.

[0071] Based on the pixel circuit described above, by flexibly setting the clock signal and enable control signal of the GOA unit, the GOA unit can output different gate scan signals to the pixel circuit at different times, thereby realizing local pixel refresh.

[0072] In some embodiments, optionally, each GOA unit is connected to an enable control signal MS, which is used to control the waveform of the output signal of the GOA unit. Optionally, when the enable control signal MS is a (first level signal), such as a low level signal, it is used to realize the display output of the high refresh rate area; when the enable control signal MS is a (second level signal), such as a high level signal, it is used to realize the display output of the low refresh rate area.

[0073] Referring to Figures 1 to 4, for display panels capable of partial refresh, the display area is divided into sequentially arranged low refresh rate / high refresh rate areas, or sequentially arranged low refresh rate / high refresh rate / low refresh rate areas. Areas with different refresh rates are adjacent, and there are adjacent boundaries between display areas with different refresh rates. To accommodate outputs at different refresh rates, it is usually necessary to switch the source drive module and / or drive mode at adjacent boundary positions. At the boundary positions, the settings of various signals will change. For example, when displaying a frame of image, when switching from a low refresh rate area to a high refresh rate area, it is necessary to switch the first source drive module for data signal output to the second source drive module. In the low refresh rate area, the VGH voltage will jump at the adjacent boundary position due to the switching of the source drive module, as shown in Figure 6, thus causing a mixed bright and dark band problem. In addition, because the signal mode of the data signal output by the source drive module switches from DC voltage to a square wave mode with continuous high and low jumps, voltage fluctuations such as VGH will also occur in the high refresh rate area, causing a mixed bright and dark band problem at the low-cut high edge.

[0074] To address the aforementioned technical problems, this disclosure provides a display driving method. When displaying a frame of image, before switching from a first refresh area to a second refresh area, a first source driver module corresponding to the data signal output of the first refresh area is switched to a second source driver module corresponding to the data signal output of the second refresh area. Furthermore, the second source driver module is controlled to switch its data output mode after the switch. In other words, the switching of the source driver module and the data output mode are performed before switching from the first refresh area to the second refresh area, thus avoiding the problem of mixed bright and dark bands caused by voltage fluctuations due to the switching of the source driver module and the data output mode in the area between the first and second refresh areas.

[0075] In one embodiment of this disclosure, as shown in FIG7, optionally, the display driving method includes:

[0076] S710, when the display panel displays the Mth frame image, during the process of the first source drive module outputting the first data signal to the first refresh area at the first refresh frequency, when the first data signal is scanned to the n1th pixel row of the first refresh area, the first source drive module used to output the first data signal is switched to the second source drive module.

[0077] S720, during the process of the second source drive module outputting the first data signal, when the first data signal is scanned to the n2th pixel row of the first refresh area, the second source drive module is controlled to switch to output the third data signal to the first refresh area at the third refresh frequency.

[0078] S730, after the third data signal is scanned to the n3rd pixel row, the second source drive module is controlled to switch to output the second data signal to the second refresh area adjacent to the first refresh area at the second refresh frequency; wherein, M, n1, n2 and n3 are integers greater than or equal to 1.

[0079] Referring to Figures 1 to 3, when displaying a frame of image, optionally, the gate driving circuit 300 controls each pixel row to perform data scanning from top to bottom. In the first refresh area, for example, a low refresh frequency area, a first data signal is output at a first refresh frequency; in the second refresh area, for example, a high refresh frequency area, a second data signal is output at a second refresh frequency.

[0080] In some embodiments of this disclosure, optionally, as shown in Figures 1 and 2, the range of regions with different refresh rates on the display panel is determined before applying the display driving method. For example, when the display panel is divided into a first refresh area and a second refresh area, the area corresponding to the first pixel row to the Nth pixel row is determined to be the first refresh area, and the area from the (N+1)th pixel row to the last pixel row at the bottom is determined to be the second refresh area. Similarly, when the display panel also includes a third refresh area, the pixel rows corresponding to the third refresh area are further determined, which will not be repeated here.

[0081] Using the display driving method described in this embodiment, as shown in Figures 1 and 8, when displaying the Mth frame image, in the first stage, the enable control signal MS outputs a second level signal, and the first source driving module outputs a first data signal to the first refresh area 1 at a first refresh frequency. During the process of controlling each pixel row of the first refresh area 1 to perform data scanning from top to bottom, when the first data signal is scanned to the n1th pixel row of the first refresh area, the first source driving module used to output the first data signal is switched to the second source driving module, that is, when the first data signal is scanned to the n1th pixel row, the source driving module is switched.

[0082] Referring to Figure 8, in the second stage, the second source driver module outputs a first data signal, and the gate driver circuit scans the pixel rows after the n1th pixel row in the first refresh area 1, sequentially outputting the first data signal from the second source driver module to each pixel row after the n1th pixel row in the first refresh area 1. During this data scanning process, when the first data signal reaches the n2th pixel row in the first refresh area 1, the second source driver module is controlled to switch the data output mode, and the output first data signal is switched to a third data signal output at the third refresh frequency.

[0083] In some embodiments, optionally, the n1st pixel row and the n2th pixel row belong to different pixel rows, and the difference between the n2th pixel row and the n1st pixel row is greater than or equal to 64 pixel rows, but this is not a limitation. In this implementation, during data scanning in the first refresh area 1 (low-frequency refresh area), after switching the first source driver module applied to the data signal output of the first refresh area 1 to the second source driver module applied to the data signal output of the second refresh area 2, after scanning to the n2th pixel row at intervals greater than or equal to 64 pixel rows, the second source driver module is controlled to switch data output modes. This ensures that the source driver module switching is completed before the data output mode switching, and that the source driver module switching is stable before the data output mode switching, thus avoiding excessive voltage fluctuations.

[0084] As shown in Figure 8, in the third stage, the level signal output by the enable control signal MS is switched from the second level signal to the first level signal. After the third data signal is scanned to the n3rd pixel row, the second source drive module is controlled to switch the data output mode again, switching the third data signal output at the third refresh frequency to the second data signal output at the second refresh frequency. The second data signal is then scanned from top to bottom to each pixel row of the second refresh area 2, so that the second refresh area 2 displays the image corresponding to the second data signal.

[0085] In some embodiments, optionally, the n3rd pixel row is located within the first refresh area, and the boundary pixel row of the first refresh area near the second refresh area is the same pixel row as the n3rd pixel row, that is, the n3rd pixel row is the last pixel row of the first refresh area; or, the boundary pixel row of the first refresh area near the second refresh area is a different pixel row from the n3rd pixel row.

[0086] The n3rd pixel row is located within the second refresh area, and the pixel row of the second refresh area that is close to the boundary of the first refresh area is the same pixel row as the n3rd pixel row, that is, the n3rd pixel row is the first pixel row of the second refresh area.

[0087] In some embodiments, optionally, the n3rd pixel row and the n2nd pixel row belong to different pixel rows, and the interval between the n3rd pixel row and the n2nd pixel row is greater than or equal to 32 pixel rows, but is not limited to this.

[0088] Optionally, the number of pixel rows between the n2nd pixel row and the n1st pixel row is greater than or equal to the number of pixel rows between the n3rd pixel row and the n2nd pixel row.

[0089] In this implementation, during the data scanning process of the first refresh area 1 (low-frequency refresh area), during the transition phase from scanning from the first refresh area 1 to the second refresh area 2, after the second source drive module scans more than or equal to 32 pixel rows with the third data signal output at the third refresh frequency, the data mode is switched to output data using the image displayed in the second refresh area 2. In this way, the voltage fluctuation caused by the direct switching of the signal from the first data signal to the second data signal is reduced by using the third data signal output during the transition phase.

[0090] Using the above display driving process, during the display of one frame of image, before switching from the first refresh area 1 to the second refresh area 2, the source drive module is switched, and the data output mode is switched during the switching transition stage (second stage) to avoid the data output mode being directly switched from the first data signal of the first refresh frequency used for display in the first refresh area 1 to the second data signal of the second refresh frequency used for display in the second refresh area 2. Since the first data signal is usually a DC signal and the second data signal is usually a square wave signal, voltage jumps are caused, resulting in fluctuations and causing mixed bright and dark bands at the switching edge of the high and low frequency areas.

[0091] Referring to Figure 8, in this embodiment of the present disclosure, before switching from the first refresh area 1 to the second refresh area 2, during the data scanning process of the n2nd pixel row to the n3rd pixel row of the first refresh area 1, the second source drive module outputs a third data signal at a third refresh frequency. In the first refresh area 1, the positions of the n2nd pixel row and the n3rd pixel row can be determined by experimental testing to ensure that the mixed bright and dark bands appearing at the switching edge of the high and low frequency regions can be eliminated for the purpose of testing.

[0092] In some embodiments, the n3rd pixel row is any pixel row within the first refresh area 1 that follows the n2nd pixel row. Optionally, the n3rd pixel row belongs to a different pixel row than the boundary pixel row of the first refresh area 1 near the second refresh area 2, meaning the n3rd pixel row is not the last pixel row of the first refresh area 1 near the second refresh area 2. In another embodiment, optionally, the n3rd pixel row belongs to the same pixel row as the boundary pixel row of the first refresh area 1 near the second refresh area 2, meaning the n3rd pixel row is the last pixel row of the first refresh area 1 near the second refresh area 2. Optionally, when the boundary pixel row of the first refresh area 1 near the second refresh area 2 and the n3rd pixel row belong to different pixel rows, before controlling the second source drive module to output the second data signal to the second refresh area at the second refresh frequency, the method further includes:

[0093] The second source drive module is controlled to output the second data signal to the remaining scan area of ​​the first refresh area at the second refresh frequency.

[0094] By adopting this implementation method, before inputting a scanning signal to the second refresh area 2, the second source drive module can complete the data output mode switching and output the second data signal at the second refresh frequency, so as to avoid the problem of mixed bright and dark bands appearing at the switching edge of the high and low frequency regions due to voltage fluctuations when switching into the second refresh area 2.

[0095] In this embodiment of the disclosure, as shown in FIG8, the signal type of the first data signal is different from that of the third data signal, and the signal type of the third data signal is the same as that of the second data signal.

[0096] In some embodiments, the first refresh frequency is lower than the second refresh frequency, that is, during the display of one frame of image, the refresh frequency is switched from a low-frequency refresh area to a high-frequency refresh area. In these embodiments, optionally, the first data signal is a DC signal, and the second and third data signals are both square wave signals.

[0097] In this implementation, before switching from a low-frequency refresh region to a high-frequency refresh region, the first source drive module for data signal output in the low-frequency refresh region is switched to the second source drive module for data output in the high-frequency refresh region, and the output data signal mode is switched from DC signal to square wave signal. This ensures that when switching to the high-frequency refresh region, the third data signal output as a square wave signal is switched to the second data signal output as a square wave signal, thereby avoiding voltage fluctuations when switching into the high-frequency refresh region.

[0098] Optionally, before switching from a low-frequency refresh region to a high-frequency refresh region, the third data signal output by the second source drive module at a third refresh frequency is the same as the second refresh frequency, and the reference voltage of the third data signal is less than the reference voltage of the second data signal.

[0099] Of course, the display driving method described in this embodiment can also be applied to a display panel with a low-frequency refresh area (first refresh area 1), a high-frequency refresh area (second refresh area 2), and a low-frequency refresh area (third refresh area 3) arranged sequentially from top to bottom, as shown in Figure 2. During the scanning of one frame of image, the switching method from the low-frequency refresh area to the high-frequency refresh area can be applied to the aforementioned display driving process. Optionally, when switching from the high-frequency refresh area to the low-frequency refresh area, as shown in Figure 2, the method further includes:

[0100] After the second data signal is scanned to the n4th pixel row of the second refresh area, the second source driver module is controlled to switch to outputting the fourth data signal to the third refresh area at a fourth refresh frequency; the n4th pixel row is the pixel row of the second refresh area that is farthest from the first refresh area; after the fourth data signal is scanned to the n5th pixel row of the third refresh area, the second source driver module is switched to the first source driver module, and the first source driver module is controlled to output the first data signal to the third refresh area at a first refresh frequency; or,

[0101] When the second data signal is scanned to the n4th pixel row of the second refresh area, the second source driver module is switched to the first source driver module, and the first source driver module is controlled to output the fourth data signal to the third refresh area at the fourth refresh frequency. After the fourth data signal is scanned to the n5th pixel row of the third refresh area, it is switched to output the first data signal to the third refresh area at the first refresh frequency.

[0102] In some embodiments, both the fourth data signal and the second data signal are square wave signals, and the reference voltage of the fourth data signal is less than the reference voltage of the second data signal. Optionally, the fourth refresh frequency and the second refresh frequency can be the same.

[0103] In this implementation, when switching from a high-frequency refresh area to a low-frequency refresh area, after completing the data scan of the high-frequency refresh area (second refresh area 2) and switching to the low-frequency refresh area (third refresh area 3), the second source driver module performs a data mode switch, changing the second data signal to the fourth data signal before switching the source driver module. This avoids voltage jumps that cause fluctuations when switching into the low-frequency refresh area, which could lead to mixed bright and dark bands at the high-low frequency area switching edge. Alternatively, if no data is written to the low-frequency refresh area, the source driver module can be switched during the transition from the high-frequency refresh area (second refresh area 2) to the low-frequency refresh area. Simultaneously, the second data signal is switched to the fourth data signal with a smaller reference voltage. Inside the low-frequency refresh area, the fourth data signal is then switched to the first data signal at the first refresh frequency (i.e., a DC signal). This also avoids voltage jumps that cause fluctuations when switching into the low-frequency refresh area.

[0104] Referring to Figures 1, 8, and 10, and using the timing diagram of the GOA unit, the scanning process of one frame of image includes the following stages:

[0105] In the first stage, the enable control signal MS outputs a high-level signal (second level signal), and the first source drive module of the source drive circuit outputs a first data signal to the first refresh area 1 at the first refresh frequency, that is, outputs a DC signal. The gate drive circuit controls each pixel row of the first refresh area 1 to perform data scanning from top to bottom.

[0106] During the first stage at time t1, that is, when the first data signal scans to the n1th pixel row of the first refresh area (low frequency refresh area), the first source driver module (low power consumption) used for data output is switched to the second source driver module (high power consumption).

[0107] During the first stage, time t2, which is the process of the second source drive module outputting the first data signal, when the first data signal scans to the n2th pixel row of the first refresh area, the second source drive module switches to outputting the third data signal to the first refresh area at the third refresh frequency; in this embodiment, optionally, the difference between the n2th pixel row and the n1th pixel row is greater than or equal to 64 pixel rows, but is not limited to this, that is, the time difference between t2 and t1 is greater than or equal to the time required to scan 64 pixel rows.

[0108] In some embodiments, the difference between the n2nd pixel row and the n1st pixel row can be determined based on the range of areas where mixed bright and dark bands appear during display panel testing.

[0109] At time t2, the data signal output by the second source drive module is converted from a DC signal to a square wave signal with a third refresh frequency, that is, the data signal is switched from DC mode to square wave transition mode.

[0110] In the second stage, before the data signal is scanned to the second refresh area (high-frequency refresh area), the enable control signal MS is switched from a high-level signal (second-level signal) to a low-level signal. The first row data signal GataN of the second refresh area (that is, the first gate scan signal Gate_N(n) of the first pixel row in the second refresh area, as shown in Figures 4 and 5) is switched to a high level. After the enable control signal MS is switched to a low level, before the first row data signal GateP of the second refresh area is triggered (that is, before the second gate scan signal Gate_P(n) of the first pixel row in the second refresh area is switched from a high level to a low level, as shown in Figures 4 and 5), at time t3, that is, after the third data signal is scanned to the n3rd pixel row of the first refresh area, the second source drive module switches to output the second data signal at the second refresh frequency.

[0111] Optionally, the interval between the n3rd pixel row and the n2nd pixel row is greater than or equal to 32 pixel rows, but is not limited to this, that is, the time difference between t3 and t2 is greater than or equal to the time required to scan 32 pixel rows.

[0112] In some embodiments, the interval between the n3rd pixel row and the n2nd pixel row can be adjusted so as not to affect the writing of the data signal GateP (which can also be described as the second gate scan signal Gate_P(n)) of the first pixel row of the second refresh area, and not to generate mixed bright and dark bands in the second refresh area.

[0113] In this implementation, before the data signal GateP of the first pixel row of the second refresh area is written at time t3, the data signal output by the second source drive module is officially switched to the data signal required to be output by the second refresh area.

[0114] In the third stage, when the second data signal scans to the last pixel row of the second refresh area, before the gate drive circuit inputs the GateN signal to the last pixel row (that is, the first gate scan signal Gate_N(n) of the last pixel row is switched to high level), the enable control signal MS performs a signal transition, switching from a low level signal to a high level signal.

[0115] Referring to Figures 9 and 10, after data is written to GateP in the last pixel row of the second refresh area (i.e., the second gate scan signal Gate_P(n) of the last pixel row switches from high to low), at time t5, the second source drive module is controlled to switch to output a fourth data signal to the third refresh area at a fourth refresh frequency. Optionally, both the fourth data signal and the second data signal are square wave signals, and the reference voltage of the fourth data signal is less than the reference voltage of the second data signal. Optionally, the refresh frequency of the fourth data signal and the third data signal is the same as the reference voltage. At time t6, after the enable control signal MS switches to a high level, i.e., after the fourth data signal scans to the n5th pixel row of the third refresh area, the source drive module is switched, changing the second source drive module to the first source drive module, and controlling the first source drive module to output a first data signal to the third refresh area at a first refresh frequency.

[0116] In some embodiments, optionally, the switching of the source drive module and the switching of the data signal can be performed simultaneously. That is, after the second data signal is scanned to the n4th pixel row of the second refresh area, at time t5, the source drive module is switched from the second source drive module to the first source drive module, and the fourth data signal is output to the third refresh area at the fourth refresh frequency of the first source drive module.

[0117] Optionally, the interval between the n5th pixel row and the n4th pixel row is greater than or equal to 32 pixel rows, but is not limited to this, that is, the time difference between t6 and t5 is greater than or equal to the time required to scan 32 pixel rows.

[0118] In some embodiments, the interval between the n5th pixel row and the n4th pixel row can be adjusted based on the display situation between the second refresh area and the third refresh area.

[0119] When the data scan switches from a high-frequency refresh area to a low-frequency refresh area, as shown in Figure 5, ResetH is still enabled after the last row of data is written in the high-frequency refresh area. Therefore, fluctuations in the Vinit voltage will also affect the display effect in the high refresh area. To address this issue, as shown in Figures 9 and 10, when the data scan switches from a high-frequency refresh area to a low-frequency refresh area, after the second data signal scan in the high-frequency refresh area ends, a fourth data signal scan in the form of a square wave signal continues. This allows the input square wave signal, which alternates between high and low voltages, to be extended into the low-frequency refresh area, thereby improving the mixed bright and dark band problem when switching from the high-frequency refresh area to the low-frequency refresh area.

[0120] Therefore, in some embodiments of this disclosure, the number of rows between the n5th pixel row and the n4th pixel row is related to the input time of the Reset signal for the n4th pixel row.

[0121] It should be noted that, optionally, as shown in Figures 8 and 10, when the enable control signal MS switches between high and low levels, the switching time has a preset interval T with the mode switching time of the corresponding source drive module. This is because the switching of the enable control signal MS between high and low levels is determined based on the waveform output of Gate_N in the pixel circuit, not based on the waveform output of Gate_P (data write) in the pixel circuit. Optionally, this preset interval T is greater than or equal to 10 pixel rows, and can be adjusted according to different pixel circuits and different timing sequences.

[0122] Based on the above, the display driving method described in this embodiment of the present disclosure performs source drive module switching and data output mode switching before scanning from the first refresh area to the second refresh area, in order to avoid the problem of mixed bright and dark bands with low cut-off and high edge caused by voltage fluctuations due to source drive module switching and data output mode switching in the area between the first refresh area and the second refresh area.

[0123] Optionally, in some embodiments of this disclosure, the method further includes:

[0124] During the display of the image on the display panel, at least one frame interval is used to adjust the boundary pixel rows adjacent to the first refresh area in the second refresh area towards the direction of the first refresh area by at least one pixel row. That is, at W frame intervals, the boundary pixel rows adjacent to the first refresh area in the second refresh area are adjusted by L pixel rows towards the direction of the first refresh area; where W and L are integers greater than or equal to 1.

[0125] By adopting this implementation method, the position of the boundary pixel rows adjacent to the first refresh area can be adjusted during the image display process of the display panel. By adjusting the position of the boundary pixel rows in the high and low frequency regions, the abnormal time of occasional bright and dark lines in some pixel rows can be reduced, and the probability of display abnormalities can be lowered.

[0126] Optionally, during at least two adjustments to the boundary pixel row, W and / or L may employ different values ​​to enable the adjustment of the boundary pixel row position to adapt to different display conditions.

[0127] In some embodiments, the method may optionally further include:

[0128] After the boundary pixel row of the second refresh area is adjusted to a preset area on the display panel, the boundary pixel row is returned to the initial position where the first adjustment was made. In this embodiment, every time at least one frame of image is displayed, the boundary pixel row adjacent to the first refresh area in the second refresh area is adjusted by at least one pixel row towards the first refresh area. For example, if the current boundary pixel row is the M1th pixel row from bottom to top, after at least one frame of image is displayed, a pixel row with an interval of L from the current boundary pixel row is determined, and the M1+Lth pixel row is set as the new boundary pixel row, thereby adjusting the area range of the first refresh area and the second refresh area.

[0129] Using the above setting method, the position of the boundary pixel row adjacent to the first refresh area in the second refresh area on the display panel is not fixed, forming a position adjustment form in a scrolling manner. Optionally, after adjusting to the preset area on the display panel, it returns to the initial position of the first adjustment and performs the next round of scrolling adjustment.

[0130] For example, taking an 8-pixel interval as an example, with images displayed every 2 frames, the position of the boundary pixel rows is adjusted by 8 pixels towards the low-frequency refresh area. Optionally, the number of pixel rows and the number of displayed image frames between the position adjustments of the boundary pixel rows can be adjusted according to the specific display situation, and in a single adjustment process, the number of pixel rows and the number of displayed image frames between each adjustment can be different.

[0131] One embodiment of this disclosure also provides a display driving device, as shown in FIG11, including:

[0132] The first control module 1101 is used to switch the first source drive module used to output the first data signal to the first refresh area when the first source drive module outputs the first data signal to the first refresh area at the first refresh frequency during the process of the first data signal being scanned to the n1th pixel row of the first refresh area.

[0133] The second control module 1102 is used to control the second source drive module to switch to outputting a third data signal to the first refresh area at a third refresh frequency when the first data signal is scanned to the n2th pixel row of the first refresh area during the process of the second source drive module outputting the first data signal.

[0134] The third control module 1103 is used to control the second source drive module to switch to output the second data signal to the second refresh area adjacent to the first refresh area at the second refresh frequency after the third data signal is scanned to the n3rd pixel row; wherein M, n1, n2 and n3 are integers greater than or equal to 1.

[0135] Using the display driving device described in this embodiment, when displaying a frame of image, before scanning from the first refresh area to the second refresh area, the first source driving module corresponding to the data signal output of the first refresh area is switched to the second source driving module corresponding to the data signal output of the second refresh area. After the switch, the second source driving module is controlled to switch the data output mode. That is, the source driving module is switched and the data output mode is switched before switching from the first refresh area to the second refresh area, so as to avoid the problem of mixed bright and dark bands with low cut-off and high edge caused by voltage fluctuations due to the switching of the source driving module and the switching of the data output mode in the area between the first refresh area and the second refresh area.

[0136] In some embodiments, optionally, when the n3rd pixel row is located within the first refresh area, and the pixel row of the first refresh area near the boundary of the second refresh area is a different pixel row from the n3rd pixel row, before controlling the second source drive module to output the second data signal to the second refresh area at the second refresh frequency, the third control module 1103 is further configured to:

[0137] The second source drive module is controlled to output the second data signal to the remaining scan area of ​​the first refresh area at the second refresh frequency.

[0138] In some embodiments, optionally, the display driving device wherein the signal type of the first data signal is different from the signal type of the third data signal, and the signal type of the third data signal is the same as the signal type of the second data signal.

[0139] In some embodiments, optionally, the display driving device wherein the first refresh frequency is less than the second refresh frequency; the first data signal is a DC signal, the second data signal and the third data signal are square wave signals respectively, and the reference voltage of the third data signal is less than or equal to the reference voltage of the second data signal.

[0140] In some embodiments, optionally, the display driving device, wherein when the first refresh frequency is less than the second refresh frequency, the third control module 1103 is further configured to:

[0141] After the second data signal is scanned to the n4th pixel row of the second refresh area, the second source drive module is controlled to switch to output the fourth data signal to the third refresh area at the fourth refresh frequency; the n4th pixel row is the pixel row of the second refresh area that is farthest from the first refresh area.

[0142] After the fourth data signal is scanned to the n5th pixel row of the third refresh area, the second source driver module is switched to the first source driver module, and the first source driver module is controlled to output the first data signal to the third refresh area at the first refresh frequency.

[0143] In some embodiments, optionally, the display driving device wherein both the fourth data signal and the second data signal are square wave signals, and the reference voltage of the fourth data signal is less than the reference voltage of the second data signal.

[0144] In some embodiments, optionally, the display driver device wherein the number of interval rows between the n5th pixel row and the n4th pixel row is related to the input time of the reset signal of the n4th pixel row.

[0145] In some embodiments, optionally, the display driving device, wherein the third control module 1103 is further configured to:

[0146] During the process of displaying an image on the display panel, the image is displayed at intervals of W frames, and the boundary pixel rows adjacent to the first refresh area in the second refresh area are adjusted by L pixel rows towards the first refresh area; where W and L are integers greater than or equal to 1.

[0147] In some embodiments, optionally, the display driving device, wherein the third control module 1103 is further configured to:

[0148] After the boundary pixel row of the second refresh area is adjusted to a preset area on the display panel, the boundary pixel row is returned to the initial position where the boundary pixel row was first adjusted.

[0149] Optionally, in the display driving device, W and / or L employ different values ​​during at least two adjustments to the boundary pixel row.

[0150] Optionally, in the display driving device, the n3rd pixel row is located within the first refresh area, and the pixel row of the first refresh area closest to the boundary of the second refresh area is the same pixel row as the n3rd pixel row; or...

[0151] The n3rd pixel row is located within the second refresh area, and the pixel row of the second refresh area that is close to the boundary of the first refresh area is the same pixel row as the n3rd pixel row.

[0152] Optionally, in the display driving device, the number of pixel rows between the n2nd pixel row and the n1st pixel row is greater than or equal to the number of pixel rows between the n3rd pixel row and the n2nd pixel row.

[0153] It should be noted that the display driver is a terminal or device that corresponds one-to-one with the above method embodiments. All implementation methods in the above method embodiments are applicable to the embodiments of the display driver and can achieve the same technical effect.

[0154] It should be noted that the division of modules or units in the embodiments of this disclosure is illustrative and only represents one logical functional division. In actual implementation, there may be other division methods. Furthermore, the functional units in the various embodiments of this disclosure can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated units described above can be implemented in hardware or as software functional units.

[0155] One embodiment of this disclosure also provides a display device, including a processor, a memory, and a program stored in the memory and executable on the processor, wherein the program, when executed by the processor, implements the display driving method as described in any of the preceding claims.

[0156] In this display device, the display driving method implemented when the program is executed by the processor can be found in the detailed description of the specific implementation of the method above, and will not be repeated here.

[0157] In addition, specific embodiments of this disclosure also provide a readable storage medium having a computer program stored thereon, wherein the program, when executed by a processor, implements the steps in the display driving method as described in any of the above.

[0158] Optionally, embodiments of this disclosure may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0159] The above descriptions are some embodiments of this disclosure. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles described in this disclosure, and these improvements and modifications should also be considered within the scope of protection of this disclosure.

Claims

1. A display driving method, wherein, include: When the display panel displays the Mth frame image, during the process of the first source drive module outputting the first data signal to the first refresh area at the first refresh frequency, when the first data signal is scanned to the n1th pixel row of the first refresh area, the first source drive module used to output the first data signal is switched to the second source drive module. During the process of the second source driver module outputting the first data signal, when the first data signal scans to the n2th pixel row of the first refresh area, the second source driver module is controlled to switch to output the third data signal to the first refresh area at the third refresh frequency. After the third data signal is scanned to the n3rd pixel row, the second source drive module is controlled to switch to output the second data signal to the second refresh area adjacent to the first refresh area at the second refresh frequency; wherein M, n1, n2 and n3 are integers greater than or equal to 1.

2. The display driving method according to claim 1, wherein, Before controlling the second source drive module to output the second data signal to the second refresh area at the second refresh frequency, the method further includes: (The n3rd pixel row is located within the first refresh area, and the pixel row of the first refresh area near the boundary of the second refresh area is a different pixel row from the n3rd pixel row.) The second source drive module is controlled to output the second data signal to the remaining scan area of ​​the first refresh area at the second refresh frequency.

3. The display driving method according to claim 1, wherein, The signal type of the first data signal is different from that of the third data signal, and the signal type of the third data signal is the same as that of the second data signal.

4. The display driving method according to claim 1 or 3, wherein, The first refresh frequency is less than the second refresh frequency; the first data signal is a DC signal, the second data signal and the third data signal are square wave signals respectively, and the reference voltage of the third data signal is less than the reference voltage of the second data signal.

5. The display driving method according to claim 1, wherein, When the first refresh frequency is less than the second refresh frequency, the method further includes: After the second data signal is scanned to the n4th pixel row of the second refresh area, the second source drive module is controlled to switch to outputting the fourth data signal to the third refresh area at a fourth refresh frequency; The n4th pixel row is the row of pixels in the second refresh area that is farthest from the first refresh area; After the fourth data signal is scanned to the n5th pixel row of the third refresh area, the second source driver module is switched to the first source driver module, and the first source driver module is controlled to output the first data signal to the third refresh area at the first refresh frequency.

6. The display driving method according to claim 1, wherein, When the first refresh frequency is less than the second refresh frequency, the method further includes: When the second data signal is scanned to the n4th pixel row of the second refresh area, the second source driver module is switched to the first source driver module, and the first source driver module is controlled to output the fourth data signal to the third refresh area at the fourth refresh frequency. After the fourth data signal is scanned to the n5th pixel row of the third refresh area, it is switched to output the first data signal to the third refresh area at the first refresh frequency. Wherein, the n4th pixel row is the pixel row that is furthest from the first refresh area in the second refresh area.

7. The display driving method according to claim 5 or 6, wherein, Both the fourth data signal and the second data signal are square wave signals, and the reference voltage of the fourth data signal is less than the reference voltage of the second data signal.

8. The display driving method according to claim 5 or 6, wherein, The number of rows between the n5th pixel row and the n4th pixel row is related to the input time of the Reset signal for the n4th pixel row.

9. The display driving method according to claim 1, wherein, The method further includes: During the process of displaying an image on the display panel, the image is displayed at intervals of W frames, and the boundary pixel rows adjacent to the first refresh area in the second refresh area are adjusted by L pixel rows towards the first refresh area; where W and L are integers greater than or equal to 1.

10. The display driving method according to claim 9, wherein, The method further includes: After the boundary pixel row of the second refresh area is adjusted to a preset area on the display panel, the boundary pixel row is returned to the initial position where the boundary pixel row was first adjusted.

11. The display driving method according to claim 9, wherein, During at least two adjustments to the boundary pixel row, W and / or L use different values.

12. The display driving method according to claim 1, wherein, The n3rd pixel row is located within the first refresh area, and the pixel row of the first refresh area closest to the boundary of the second refresh area is the same pixel row as the n3rd pixel row; or... The n3rd pixel row is located within the second refresh area, and the pixel row of the second refresh area that is close to the boundary of the first refresh area is the same pixel row as the n3rd pixel row.

13. The display driving method according to claim 1, wherein, The number of pixel rows between the n2nd pixel row and the n1st pixel row is greater than or equal to the number of pixel rows between the n3rd pixel row and the n2nd pixel row.

14. A display driving device, wherein, include: The first control module is used to switch the first source drive module used to output the first data signal to the first refresh area when the first source drive module outputs the first data signal to the first refresh area at the first refresh frequency during the process of the first data signal scanning to the n1th pixel row of the first refresh area. The second control module is used to control the second source drive module to switch to outputting a third data signal to the first refresh area at a third refresh frequency when the first data signal is scanned to the n2th pixel row of the first refresh area during the process of the second source drive module outputting the first data signal. The third control module is used to control the second source drive module to switch to output the second data signal to the second refresh area adjacent to the first refresh area at the second refresh frequency after the third data signal is scanned to the n3rd pixel row; wherein M, n1, n2 and n3 are integers greater than or equal to 1.

15. The display driving device according to claim 14, wherein, The n3rd pixel row is located within the first refresh area, and the pixel row of the first refresh area closest to the boundary of the second refresh area is the same pixel row as the n3rd pixel row; or... The n3rd pixel row is located within the second refresh area, and the pixel row of the second refresh area that is close to the boundary of the first refresh area is the same pixel row as the n3rd pixel row.

16. A display device comprising a processor, a memory, and a program stored in the memory and executable on the processor, wherein the program, when executed by the processor, implements the display driving method as claimed in any one of claims 1 to 13.

17. A readable storage medium, wherein, The readable storage medium stores a program that, when executed by a processor, implements the steps of the display driving method as described in any one of claims 1 to 13.

Images