Driving method of display panel, display device and display equipment

Abstract

The invention discloses a driving method of a display panel, a display device and display equipment, and the method comprises the steps: writing a first voltage corresponding to a first display sub-region into a first electrode of a driving transistor in the first display sub-region for any first display sub-region. And for any first display sub-region, writing a first voltage corresponding to the first display sub-region into a first electrode of a driving transistor in a holding frame of the first display sub-region, so that the voltage difference between a grid electrode and a source electrode of the driving transistor is changed, and the bias state of the driving transistor is further changed. The voltage written into the first pole of the driving transistor in the low-refresh-frequency region is adjusted to a proper voltage value, the hysteresis state of the driving transistor in the low-refresh-frequency region is changed, the voltage charged into the storage capacitor is changed along with the voltage during full frame refreshing, the brightness of the low-refresh-frequency region and the brightness of the high-refresh-frequency region are adjusted to be consistent, and the frame refreshing effect is improved. And the brightness difference between display areas with different refresh frequencies is improved.

Description

Technical Field

[0001] The present invention relates to the field of display technologies, and particularly to a driving method for a display panel, a display device, and a display apparatus. Background Art

[0002] With the development of display technologies, people's requirements for the display quality of display panels are getting higher and higher. Many application scenarios use zoned and frequency-divided display, that is, different regions are displayed at different refresh frequencies.

[0003] During the development of local refresh display, there is a problem of poor display effect. Summary of the Invention

[0004] The present invention provides a driving method for a display panel to solve the problem of poor display effect during zoned and frequency-divided display.

[0005] According to an aspect of the present invention, there is provided a driving method for a display panel, the display panel including at least two display sub-regions with different refresh frequencies; the display panel including at least one pixel circuit, the pixel circuit including a driving transistor; one display cycle of any display sub-region includes at least one refresh frame, and the display cycle of the first display sub-region further includes at least one hold frame;

[0006] The driving method for the display panel includes:

[0007] For any of the first display sub-regions, during the hold frame of the first display sub-region, write a first voltage corresponding to the first display sub-region into a first pole of the driving transistor in the first display sub-region; wherein, the first display sub-region is any of the display sub-regions except the second display sub-region, and the second display sub-region is the display sub-region with the highest refresh frequency.

[0008] Optionally, before the step of, for any of the first display sub-regions, during the hold frame of the first display sub-region, writing the first voltage corresponding to the first display sub-region into the first pole of the driving transistor in the first display sub-region, further includes:

[0009] For any of the first display sub-regions, determine the first voltage corresponding to the first display sub-region according to the refresh frequency of the first display sub-region and the refresh frequency of the second display sub-region;

[0010] Optionally, the first voltage is greater than or equal to 4.25V and less than or equal to 5.5V.

[0011] Optionally, for any one of the first display sub-regions, the difference between the first voltage corresponding to the first display sub-region and the refresh frequency is positively correlated; wherein, the difference in the refresh frequency is the difference between the refresh frequency of the second display sub-region and the refresh frequency of the first display sub-region.

[0012] Optionally, the driving method of the display panel further includes:

[0013] If the refresh frequency of the second display sub-region undergoes a frequency switch, for any one of the first display sub-regions, after receiving a frequency switch instruction, in the first to the m-th holding frames of the first display sub-region, control the voltage input to the first pole of the driving transistor in the first display sub-region to be updated to a second voltage corresponding to the first display sub-region; m is an integer greater than or equal to 1;

[0014] Wherein, the second voltage is the voltage written to the first pole of the driving transistor in the holding frame corresponding to the first display sub-region after the frequency switch of the second display sub-region is completed;

[0015] Optionally, the second voltage is greater than or equal to 4.25V and less than or equal to 5.5V.

[0016] Optionally, m is greater than 1. After receiving the frequency switch instruction, in the first to the m-th holding frames of the first display sub-region, controlling the voltage input to the first pole of the driving transistor in the first display sub-region to be updated to a second voltage corresponding to the first display sub-region includes:

[0017] After receiving the frequency switch instruction, in the first holding frame of the first display sub-region, update the first voltage corresponding to the first display sub-region to an intermediate voltage; the intermediate voltage is greater than the first voltage;

[0018] After receiving the refresh frequency switch instruction, in the second to the m-th holding frames of the first display sub-region, control the voltage input to the first pole of the driving transistor in the first display sub-region to monotonically change from the intermediate voltage corresponding to the first display sub-region to the second voltage corresponding to the first display sub-region; the intermediate voltage is greater than the second voltage.

[0019] Optionally, for any one of the first display sub-regions, the intermediate voltage corresponding to the first display sub-region is greater than the larger of the first voltage or the second voltage, and less than the data voltage corresponding to when the pixel circuit displays a black screen.

[0020] Optionally, the m is greater than or equal to 5 and less than or equal to 30;

[0021] Preferably, the m is greater than or equal to 10 and less than or equal to 18;

[0022] Preferably, m is equal to 14.

[0023] Optionally, for any one of the first display sub-regions, after receiving the frequency switching instruction, the voltage difference between every two adjacent holding frames among the second to the m-th holding frames of the first display sub-region input to the first pole of the driving transistor in the first display sub-region is equal.

[0024] Optionally, the display panel includes at least three display sub-regions with different refresh frequencies;

[0025] The first display sub-regions with different fixed voltage differences complete the monotonic change from the intermediate voltage to the second voltage within different numbers of holding frames; wherein, the fixed voltage difference is the difference between the intermediate voltage corresponding to the first display sub-region and the second voltage corresponding to the first display sub-region.

[0026] Optionally, m = 1,

[0027] After receiving the frequency switching instruction, in the first holding frame of the first display sub-region, control the voltage input to the first pole of the driving transistor in the first display sub-region to be updated to the second voltage corresponding to the first display sub-region.

[0028] Optionally, after receiving the frequency switching instruction, after the step of controlling the voltage input to the first pole of the driving transistor in the first display sub-region to be updated to the second voltage corresponding to the first display sub-region in the first to the m-th holding frames of the first display sub-region, further include:

[0029] After receiving the frequency switching instruction, in the (m + 1)-th holding frame and each subsequent holding frame of the first display sub-region, write the second voltage corresponding to the first display sub-region to the first pole of the driving transistor in the first display sub-region.

[0030] Optionally, the driving method of the display panel further includes:

[0031] For any display sub-region, write a first initialization voltage to the second pole of the driving transistor in each holding frame; the first initialization voltage corresponding to the first display sub-region is different from the first initialization voltage corresponding to the second display sub-region.

[0032] Optionally, the pixel circuit further includes a light-emitting device, and the driving method of the display panel further includes:

[0033] For any display sub-region, write a second initialization voltage to the anode of the light-emitting device in each holding frame; the second initialization voltage corresponding to the first display sub-region is different from the second initialization voltage corresponding to the second display sub-region.

[0034] Optionally, the driving method of the display panel further includes:

[0035] For any one of the display sub-regions, in the refresh frame of the display sub-region, write the data voltage corresponding to the display sub-region to the first pole of the driving transistor of the display sub-region.

[0036] According to another aspect of the present invention, there is also provided a driving method of a display panel. The display panel includes at least two display sub-regions with different refresh frequencies; the display panel includes at least one pixel circuit, and the pixel circuit includes a driving transistor; one display cycle of any display sub-region includes at least one refresh frame, and the display cycle of the first display sub-region further includes at least one hold frame;

[0037] The driving method of the display panel includes:

[0038] If the refresh frequency of the second display sub-region performs a frequency switch, for any one of the first display sub-regions, after receiving a frequency switch instruction, in the first hold frame to the m-th hold frame of the first display sub-region, control the voltage input to the first pole of the driving transistor in the first display sub-region to be updated to the second voltage corresponding to the first display sub-region; m is an integer greater than or equal to 1;

[0039] Wherein, the first display sub-region is any one of the display sub-regions except the second display sub-region, the second display sub-region is the display sub-region with the highest refresh frequency, the first voltage is the voltage corresponding to the first display sub-region written to the first pole of the driving transistor in the hold frame before the frequency switch of the second display sub-region; the second voltage is the voltage corresponding to the first display sub-region written to the first pole of the driving transistor in the hold frame after the frequency switch of the second display sub-region is completed.

[0040] Optionally, m is greater than 1. After receiving the frequency switch instruction, in the first hold frame to the m-th hold frame of the first display sub-region, controlling the voltage input to the first pole of the driving transistor in the first display sub-region to be updated to the second voltage corresponding to the first display sub-region includes:

[0041] After receiving the frequency switch instruction, in the first hold frame of the first display sub-region, update the first voltage corresponding to the first display sub-region to an intermediate voltage; the intermediate voltage is greater than the first voltage;

[0042] After receiving the frequency switching instruction, in the second holding frame to the m-th holding frame of the first display sub-region, control the voltage input to the first pole of the driving transistor in the first display sub-region to monotonically change from the intermediate voltage corresponding to the first display sub-region to the second voltage corresponding to the first display sub-region; the intermediate voltage is greater than the second voltage and greater than the first voltage;

[0043] Optionally, the second voltage is greater than or equal to 4.25V and less than or equal to 5.5V;

[0044] The first voltage is greater than or equal to 4.25V and less than or equal to 5.5V.

[0045] Optionally, for any one of the first display sub-regions, after receiving the frequency switching instruction, the difference in the voltage input to the first pole of the driving transistor in the first display sub-region between every two adjacent holding frames in the second holding frame to the m-th holding frame of the first display sub-region is equal.

[0046] Optionally, m = 1,

[0047] After receiving the frequency switching instruction, in the first holding frame of the first display sub-region, control the voltage input to the first pole of the driving transistor in the first display sub-region to be updated to the second voltage corresponding to the first display sub-region.

[0048] According to another aspect of the present invention, a display device is provided, including a display panel and a driving chip, and the driving chip is used to execute the driving method of the display panel described in the above aspect.

[0049] According to another aspect of the present invention, a display device is provided, including the display device described in any item of the above aspect.

[0050] In the embodiment of the present invention, for any first display sub-region except the display sub-region with the highest refresh frequency, in the holding frame of the first display sub-region, write the first voltage corresponding to the first display sub-region to the first pole of the driving transistor, so that the voltage difference between the gate and the source of the driving transistor changes, thereby changing the bias state of the driving transistor. By adjusting the voltage written from the first display sub-region to the first pole of the driving transistor to an appropriate voltage value, the hysteresis state of the driving transistor in the first display sub-region is changed. During the full refresh frame, the voltage charged into the storage capacitor changes accordingly, and the brightness of the first display sub-region and the second display sub-region is adjusted to be consistent, improving the brightness difference between the display sub-regions with different refresh frequencies.

[0051] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present invention, nor is it used to limit the scope of the present invention. Other features of the present invention will become readily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0053] Figure 1 It is a schematic structural diagram of a pixel circuit;

[0054] Figure 2 It is a waveform diagram of a display panel;

[0055] Figure 3 It is a flowchart of a driving method for a display panel provided by an embodiment of the present invention;

[0056] Figure 4 It is a schematic diagram of different display sub-regions in a display panel provided by an embodiment of the present invention;

[0057] Figure 5 It is a driving waveform diagram of a display panel provided by an embodiment of the present invention;

[0058] Figure 6 It is a partial enlarged view of the driving waveform of a display panel provided by this embodiment;

[0059] Figure 7 It is a flowchart of another driving method for a display panel provided by an embodiment of the present invention;

[0060] Figure 8 It is a flowchart of another driving method for a display panel provided by an embodiment of the present invention;

[0061] Figure 9 It is a waveform diagram corresponding to the frequency cutting of the display sub-region in a display panel provided by an embodiment of the present invention;

[0062] Figure 10 It is another driving waveform diagram of a display panel provided by an embodiment of the present invention;

[0063] Figure 11 It is a flowchart of another driving method for a display panel provided by an embodiment of the present invention;

[0064] Figure 12 It is a schematic structural diagram of a display device provided by an embodiment of the present invention. Detailed implementation manners

[0065] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0066] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to be used to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of the present invention described herein can be implemented in an order different from those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0067] The inventor has found through long-term research that during the development of local brush display, there is a problem of poor display effect. Specifically, there are brightness and darkness differences between display sub-regions with different refresh frequencies. After research by the inventor, it is found that the reason is that the hysteresis states of the driving transistors are different between display regions with different refresh frequencies, resulting in brightness and darkness differences. Specifically, Figure 1It is a schematic structural diagram of a pixel circuit. The pixel circuit includes a driving transistor T1, a data writing transistor T2, a compensation transistor T3, a first initialization transistor T4, a first light-emitting control transistor T5, a second light-emitting control transistor T6, a second initialization transistor T7, a third initialization transistor T8, and a storage capacitor Cst. Among them, the gate of the data writing transistor T2 is connected to a first scan signal SP1, the gate of the compensation transistor T3 is connected to a second scan signal SN2, the gate of the first initialization transistor T4 is connected to a third scan signal SN1, the gates of the first light-emitting control transistor T5 and the second light-emitting control transistor T6 are connected to a light-emitting control signal EM, and the gates of the second initialization transistor T7 and the third initialization transistor T8 are connected to a fourth scan signal SP2. The first light-emitting control transistor T5, the driving transistor T1, the second light-emitting control transistor T6, and the light-emitting device OLED are sequentially connected in series between a first power supply VDD and a second power supply VSS. The data writing transistor T2 is also connected to a data line Data. The first initialization transistor T4 is connected to a first initialization signal line Refn1. The second initialization transistor T7 is connected to a second initialization signal line Refn2. The third initialization transistor T8 is connected to a third initialization signal line Refp. Figure 2 It is a waveform diagram of a display panel. Refer to Figure 1 and Figure 2, Exemplarily, the refresh rate of the high refresh rate region is 120 Hz, and the refresh rate of the low refresh rate region is 1 Hz. The first scan signal SP1 accessed by both the pixel circuit in the high refresh rate region and the pixel circuit in the low refresh rate region is 120 Hz. Different refresh rates are achieved by the high and low potentials output by the second scan signal SN2. The first scan signal SP1 is generated by a gate driving circuit. The gate driving circuit generates the first scan signal SP1 according to the start signal SinP1. The refresh rate control voltage VrefE is used to be output to the gate of the compensation transistor T3. In the local refresh state, the gate of the compensation transistor T3 in the high refresh rate region is set to a high level, the compensation transistor T3 is turned on, and the data voltage can be written into the gate of the driving transistor T1 at the high refresh rate per frame. The gate of the compensation transistor T3 in the low refresh rate region is set to a low level, and the data voltage will only be written into the gate of the driving transistor T1 at the low refresh rate, thereby realizing local refresh display. During local refresh display, the data writing transistor T2 in the pixel circuit is turned on, but the voltage Source on the data line is in a high resistance state (abbreviated as Hiz). During local refresh display, the start signal SinP1 is normally refreshed. The state of the data voltage Source in the low refresh rate region will affect the voltages of the source and drain of the driving transistor, thereby affecting the source-drain bias and hysteresis state of the driving transistor T1, affecting the turn-on state of the driving transistor T1, and ultimately affecting the brightness of the light-emitting device OLED, affecting the brightness of the low refresh rate region, resulting in a brightness difference between the high refresh rate region and the low refresh rate region.

[0068] In view of the above technical problems, an embodiment of the present invention provides a driving method for a display panel, which solves the problem of brightness difference between display regions with different refresh rates by changing the bias state of the driving transistor.

[0069] Figure 3 It is a flowchart of a driving method for a display panel provided by an embodiment of the present invention. Figure 4 It is a schematic diagram of different display sub-regions in a display panel provided by an embodiment of the present invention. Figure 5 It is a driving waveform diagram of a display panel provided by an embodiment of the present invention. Figure 6 It is a partial enlarged view of a driving waveform of a display panel provided by this embodiment, where Figure 6 is for Figure 5 a partial enlarged view of the first part 4 in Figure 5 and Figure 6 The Source in Figure 1 can be regarded as the voltage output by the driving chip to the data line. Refer to Figures 3 - 6, The display panel includes at least two display sub - regions with different refresh frequencies; the display panel includes at least one pixel circuit, and the pixel circuit includes a driving transistor T1. One display cycle of any display sub - region includes at least one refresh frame, and the display cycle of the first display sub - region further includes at least one hold frame. The display cycle includes each display frame included from one refresh frame to the next refresh frame. Both the refresh frame and the hold frame are display frames; the driving method of the display panel includes:

[0070] S110: For any first display sub - region, during the hold frame of the first display sub - region, write a first voltage corresponding to the first display sub - region to the first pole of the driving transistor in the first display sub - region.

[0071] Among them, the first display sub - region is any display sub - region other than the second display sub - region, and the second display sub - region is the display sub - region with the highest refresh frequency.

[0072] For any first display sub - region, one display cycle of the first display sub - region includes at least one refresh frame and at least one hold frame. One display cycle of the second display sub - region may only include multiple refresh frames, or include at least one refresh frame and at least one hold frame. In the refresh frame, write the data voltage to the gate of the driving transistor T1, and in the hold frame, do not perform the process of writing the data voltage to the gate of the driving transistor T1.

[0073] The display panel includes multiple display sub - regions, and at least two of the multiple display sub - regions have different refresh frequencies, realizing partitioned and frequency - divided display of the display panel. As Figure 4 shown, in this embodiment, it is exemplarily shown that the display panel includes three display sub - regions, and the display sub - regions are arranged along the column direction of the sub - pixels in the display panel. The three display sub - regions are sequentially denoted as the first target display sub - region 1, the second target display sub - region 2, and the third target display sub - region 3. The first target display sub - region 1 and the third target display sub - region 3 are low - refresh - frequency regions with the same refresh frequency of 1 Hz, and the second target display sub - region 2 is a high - refresh - frequency region with a refresh frequency of 120 Hz. Therefore, for Figure 1For the pixel circuit shown, the frequency of the first scan signal SP1 to which the data writing transistor T2 is connected is 120 Hz. Correspondingly, the frequency of the start signal SinP1 in the gate driving circuit that generates the first scan signal SP1 is also 120 Hz. In the scanning intervals of the low refresh frequency regions, i.e., the first target display sub-region 1 and the third target display sub-region 3, the refresh frequency control voltage VrefE is at a low level, controlling the compensation transistor T3 in the first target display sub-region 1 and the third target display sub-region 3 to turn off, and the corresponding display sub-regions are not refreshed. In the scanning interval of the high refresh frequency region, i.e., the second target display sub-region 2, the refresh frequency control voltage VrefE corresponding to the pixel circuit in the second sub-display sub-region 2 is at a high level, controlling the compensation transistor T3 in the second target display sub-region 2 to turn on, to achieve local refresh display. In this embodiment, the first target display sub-region 1 and the third target display sub-region 3 are both the first display sub-regions, and the second target display sub-region 2 is the second display sub-region.

[0074] For the first display sub-region, the first voltage written to the first pole of the driving transistor T1 corresponds to the refresh frequency of the first display sub-region. After the refresh frequency of the first display sub-region is determined, the corresponding first voltage can be determined.

[0075] Since the refresh frequencies of the first target display sub-region 1 and the third target display sub-region 3 are the same in this embodiment, therefore, they correspond to the same first voltage. In each holding frame of the first target display sub-region 1, control the first voltage to be written to the first pole of the driving transistor T1 in the first target display sub-region 1. In each holding frame of the third target display sub-region 3, control the first voltage to be written to the first pole of the driving transistor T1 in the third target display sub-region 3.

[0076] In other embodiments, if the first target display sub-region 1 and the third target display sub-region 3 are different, then the corresponding first voltages written are different. Among them, in each holding frame of the first target display sub-region 1, the compensation transistor T3 in the first target display sub-region 1 is turned off. In each holding frame of the third target display sub-region 3, the compensation transistor T3 in the third target display sub-region 3 is turned off.

[0077] Such as Figure 6As shown, between two pulses adjacent to the start signal SinP1 is a scanning period. One frame includes a first scanning section t1, a second scanning section t2, and a third scanning section t3. In the first scanning section t1, corresponding to the scanning state of the first target display sub-region 1, in the first scanning section t1, the data writing transistor T2 is still for high-frequency refreshing. The first voltage corresponding to the first target display sub-region 1 is transmitted to the first pole of the driving transistor T1 through the turned-on data writing transistor T2. The refresh frequency control voltage VrefE is at a low level, controlling the compensation transistor T3 of the first target display sub-region 1 to turn off, and the first display sub-region t1 is not refreshed. In the second scanning section t2, corresponding to the scanning state of the second target display sub-region 2, in the second scanning section t2, the data writing transistor T2 is for high-frequency refreshing, and the data voltage is transmitted to the first pole of the driving transistor T1 through the turned-on data writing transistor T2. The refresh frequency control voltage VrefE is at a high level, controlling the compensation transistor T3 of the second target display sub-region 2 to turn on, and then writing the data voltage to the gate of the driving transistor T1 to achieve the refreshing of the second target display sub-region 2. In the third scanning section t3, corresponding to the scanning state of the third target display sub-region 3, in the third scanning section t3, the data writing transistor T2 is still for high-frequency refreshing. The first voltage corresponding to the third target display sub-region 3 is transmitted to the first pole of the driving transistor T1 through the turned-on data writing transistor T2. The refresh frequency control voltage VrefE is at a low level, controlling the compensation transistor T3 of the third target display sub-region 3 to turn off, and the third target display sub-region 3 is not refreshed. Whether it is the first target display sub-region 1 or the third target display sub-region 3, in their respective holding frames, the first voltage is written to the first pole of the driving transistor T1, so that the voltage difference between the gate and the first pole of the driving transistor T1 changes, changing the bias state of the driving transistor T1, that is, changing the turn-on state of the driving transistor T1, so that in the full refresh frame, the voltage charged into the storage capacitor Cst changes accordingly, and the brightness of the low refresh frequency region and the high refresh frequency region is adjusted to be consistent.

[0078] In the embodiment of the present invention, for any first display sub-region, in the holding frame of the first display sub-region, the first voltage corresponding to the first display sub-region is written to the first pole of each driving transistor in the first display sub-region, so that the voltage difference between the gate and the source of the driving transistor changes, and then the bias state of the driving transistor is changed. By adjusting the voltage written to the first pole of the driving transistor in the low refresh frequency region to an appropriate voltage value, that is, the first voltage, the hysteresis state of the driving transistor in the low refresh frequency region is changed. In the full refresh frame, the voltage charged into the storage capacitor changes accordingly, and the brightness of the low refresh frequency region and the high refresh frequency region is adjusted to be consistent, improving the brightness difference between display regions with different refresh frequencies.

[0079] Figure 7 It is a flowchart of another driving method for a display panel provided by an embodiment of the present invention. Refer toFigure 7 , optionally, the driving method of the display panel includes:

[0080] S111: For any first display sub-region, determine a first voltage corresponding to the first display sub-region according to the refresh frequency of the first display sub-region and the refresh frequency of the second display sub-region.

[0081] For any first display sub-region, the corresponding first voltage is related to its own refresh frequency and the refresh frequency of the display sub-region with the highest refresh frequency. According to the pre-generated preset correspondence relationship, the current refresh frequency of the first display sub-region, and the refresh frequency of the display sub-region with the highest current refresh frequency, determine the magnitude of the corresponding first voltage by looking up a table or interpolation. Among them, the preset correspondence relationship includes multiple frequency parameters and the first voltages corresponding to each frequency parameter. The frequency parameters include the refresh frequency of the first display sub-region and the refresh frequency of the second display sub-region. Exemplarily, in the early stage, set multiple frequency parameters. For example, the refresh frequency of one display sub-region is 1Hz, and the refresh frequency of another display sub-region is 120Hz. Continuously adjust the voltage of the first pole of the driving transistor of the display sub-region with a refresh frequency of 1Hz through experiments. Finally, determine the first voltage corresponding to the display sub-region with a refresh frequency of 1Hz under this frequency parameter through multiple tests. Set the refresh frequency of one display sub-region to 30Hz, and the refresh frequency of another display sub-region to 120Hz. Determine the first voltage corresponding to the display sub-region with a refresh frequency of 30Hz under this frequency parameter through experiments. Then, form a preset correspondence relationship with multiple frequency parameters and their corresponding first voltages.

[0082] For any first display sub-region, when there is a reference frequency parameter among multiple frequency parameters, use the first voltage corresponding to the reference frequency parameter as the first voltage corresponding to the first display sub-region. The lower refresh frequency in the reference frequency parameter is equal to the refresh frequency of the first display sub-region, and the higher refresh frequency in the reference frequency parameter is equal to the refresh frequency of the second display sub-region. When there is no reference frequency parameter among multiple frequency parameters, determine the first voltage corresponding to the current first display sub-region by interpolation. Among them, the influence of the position of the display sub-region on the first voltage is not considered.

[0083] Optionally, the first voltage is greater than or equal to 4.25V and less than or equal to 5.5V. Specifically, the first voltage can be 4.25, 4.5, 4.7, 4.9, 5.0, 5.5V.

[0084] Optionally, for any first display sub-region, the difference between the first voltage corresponding to the first display sub-region and the refresh frequency is positively correlated; among them, the difference in refresh frequency is the difference between the refresh frequency of the second display sub-region and the refresh frequency of the first display sub-region.

[0085] Exemplarily, if the display panel includes three display sub - regions, the refresh frequency of the first target display sub - region 1 is 1 Hz, the refresh frequency of the second target display sub - region 2 is 120 Hz, and the refresh frequency of the third target display sub - region 3 is 30 Hz. Since the difference between the refresh frequency of the second target display sub - region 2 and the refresh frequency of the first target display sub - region 1 is greater than the difference between the refresh frequency of the second target display sub - region 2 and the refresh frequency of the third target display sub - region 3, therefore, the first voltage corresponding to the first target display sub - region 1 is greater than the first voltage corresponding to the third target display sub - region 3. Because the influence on the hysteresis state of the driving transistor is different at different refresh frequencies, different first voltages are set for different first display sub - regions according to the differences in different refresh frequencies, so that the hysteresis states of the driving transistors in different display sub - regions are restored to be consistent, and further the brightness and darkness differences between different display sub - regions are reduced.

[0086] S121: For any first display sub - region, in the holding frame of the first display sub - region, write the first voltage corresponding to the first display sub - region to the first pole of the driving transistor in the first display sub - region.

[0087] S131: For any display sub - region, in the refresh frame of the display sub - region, write the data voltage corresponding to the display sub - region to the first pole of the driving transistor of the display sub - region.

[0088] Whether it is the second display sub - region such as the second target display sub - region 2, or the first brush display sub - region such as the first target display sub - region 1 or the third target display sub - region 3, in the refresh frame, that is, in the stage when the compensation transistor T3 in the corresponding display sub - region is turned on, the corresponding data voltage is transmitted on the data line, so that the corresponding display sub - region performs corresponding picture display according to the data voltage.

[0089] Optionally, if the refresh frequency of the second display sub - region undergoes frequency switching, for any first display sub - region, after receiving the frequency - switching instruction, in the first holding frame to the m - th holding frame of the first display sub - region, control the voltage input to the first pole of the driving transistor in the first display sub - region to be updated from the first voltage corresponding to the first display sub - region to the second voltage corresponding to the first display sub - region; m is an integer greater than or equal to 1; where the second voltage is the voltage corresponding to the first display sub - region written to the first pole of the driving transistor in the holding frame after the frequency switching of the second display sub - region is completed.

[0090] As the display progresses, when frequency switching is required in the second display sub-region, such as switching from 120 Hz to 60 Hz, or 80 Hz, or 240 Hz, the refresh frequency of the first display sub-region remains unchanged. Then, for any first display sub-region, the difference between the refresh frequency of the first display sub-region and the refresh frequency after the frequency switching of the second display sub-region changes, and correspondingly, the voltage at the first pole of the driving transistor that maintains the frame writing will also change accordingly. After receiving the frequency switching instruction, the driving chip will immediately control the second display sub-region to perform frequency switching, and the second display sub-region can complete the frequency switching instantaneously. Therefore, after receiving the frequency switching instruction, within at least one holding frame corresponding to the first display sub-region, it is necessary to control the voltage input to the first pole of the driving transistor in the first display sub-region to change from the first voltage corresponding to the first display sub-region to the second voltage corresponding to the first display sub-region, so that after the frequency switching of the second display sub-region is completed, the hysteresis states of each display sub-region still remain consistent, improving the display uniformity and the display effect.

[0091] Optionally, the second voltage is greater than or equal to 4.25 V and less than or equal to 5.5 V. Specifically, the second voltage can be 4.25, 4.5, 4.7, 4.9, 5.0, 5.25, 5.5 V. Among them, the frequency switching instruction is an instruction to control the second display sub-region to switch from the current refresh frequency to another refresh frequency.

[0092] For the situation after receiving the frequency switching instruction, within the first holding frame to the m-th holding frame of the first display sub-region, controlling the voltage input to the first pole of the driving transistor in the first display sub-region to be updated to the second voltage corresponding to the first display sub-region can specifically correspond to two schemes, namely Scheme 1 and Scheme 2.

[0093] Scheme 1: m = 1. After receiving the frequency switching instruction, in the first holding frame received by the first display sub-region, control the voltage input to the first pole of the driving transistor in the first display sub-region to be updated to the second voltage corresponding to the first display sub-region.

[0094] In this embodiment, after receiving a frequency switching instruction, the voltage input to the first pole of the driving transistor in the first display sub-region is directly controlled to change from a first voltage to a second voltage in the first holding frame of the first display sub-region, ensuring that after the frequency of the second display sub-region is switched, the hysteresis states of the driving transistors between the display sub-regions can still be relatively similar, thereby making the brightness difference between the display sub-regions smaller and improving the display uniformity. Exemplarily, during the entire display process, if the k-th display frame receives an instruction that the second display sub-region needs to perform a frequency switch, then the second display sub-region switches to the second refresh frequency in the (k + 1)-th display frame. The refresh frequency of the second display sub-region in the k-th display frame is the first refresh frequency. After the k-th display frame, the voltage input to the first pole of the driving transistor in the first display sub-region is controlled to change to the second voltage in the first holding frame that the first display sub-region encounters.

[0095] Solution 2: As Figure 8 Steps S122 to S132. Specifically, Figure 8 is a flowchart of another driving method for a display panel provided by an embodiment of the present invention. Refer to Figure 1 、 Figure 4 and Figure 8 . Optionally, m is greater than 1. The method includes:

[0096] S112: For any first display sub-region, in the holding frame of the first display sub-region, write the first voltage corresponding to the first display sub-region to the first pole of the driving transistor in the first display sub-region.

[0097] S122: After receiving a frequency switching instruction, in the first holding frame of the first display sub-region, update the first voltage corresponding to the first display sub-region to an intermediate voltage; the intermediate voltage is greater than the first voltage.

[0098] When the second display sub-region does not perform a frequency switch and the display screen is stable, in the holding frame of the first display sub-region, it is only necessary to maintain the writing of the first voltage. However, when the second display sub-region performs a frequency switch, such as switching from 120 Hz to 1 Hz, the first voltage written in the first display sub-region changes to the second voltage. Although it improves the brightness difference between the display sub-regions with different refresh frequencies, it will exacerbate the flicker problem caused by the frequency switching in the second display sub-region. Therefore, after receiving a frequency switching instruction, it is necessary to first switch the first voltage to an intermediate voltage greater than the first voltage. The intermediate voltage is beneficial to improving the flicker problem caused by frequency switching. Therefore, to improve the flicker problem, after the frequency switch, control the driving transistor in the first display sub-region to transition from the intermediate voltage to the second voltage. Optionally, the display sub-region with the highest refresh frequency corresponding before the frequency switch and the display sub-region with the highest refresh frequency corresponding after the frequency switch are the same display sub-region.

[0099] Optionally, for any first display sub-region, the intermediate voltage corresponding to the first display sub-region is greater than the larger of the first voltage or the second voltage corresponding to the first display sub-region, and less than the data voltage corresponding when the pixel circuit displays a black screen. When the pixel circuit displays a black screen, the sub-pixels corresponding to the pixel circuit do not emit light, and at this time, the data voltage written corresponding to the pixel circuit is the black state voltage. For any first display sub-region, setting the intermediate voltage to be greater than the larger of the first voltage or the second voltage and less than the black state voltage can better improve the flicker problem caused by frequency switching and improve the display effect.

[0100] S132: After receiving the frequency switching instruction, in the second to the m-th holding frames of the first display sub-region, control the voltage input to the first pole of the driving transistor in the first display sub-region to monotonically change from the intermediate voltage corresponding to the first display sub-region to the second voltage corresponding to the first display sub-region; the intermediate voltage is greater than the second voltage.

[0101] Set m to be greater than or equal to 2, and the refresh frequencies of the first target display sub-region 1 and the third target display sub-region 3 are the same. Then, within the m holding frames, control the voltage on the data line to monotonically change from the intermediate voltage to the second voltage to improve the problem of frequency switching flicker. The monotonic change is to control the voltage on the data line to monotonically decrease from the intermediate voltage to the second voltage within the m holding frames. In another optional embodiment, the refresh frequencies of the first target display sub-region 1 and the third target display sub-region 3 are different, then the second voltages corresponding to the first target display sub-region 1 and the third target display sub-region 3 are different. Optionally, set the intermediate voltages corresponding to the first target display sub-region 1 and the third target display sub-region 3 to be the same. The first voltage of the first pole of the driving transistor T1 in the first target display sub-region 1 gradually changes from the intermediate voltage to the second voltage after 8 holding frames, and the voltage of the first pole of the driving transistor T1 in the third target display sub-region 3 changes from the intermediate voltage to the second voltage corresponding to the third target display sub-region 3 after 15 holding frames, or the first target display sub-region 1 and the third target display sub-region 3 pass through the same number of holding frames, and the intermediate voltage gradually changes to the corresponding second voltage. In other embodiments, the intermediate voltages corresponding to the first target display sub-region 1 and the third target display sub-region 3 are different.

[0102] Optionally, for any first display sub-region, after receiving the frequency switching instruction, the difference between the voltages input to the first pole of the driving transistor in the first display sub-region in every two adjacent holding frames from the second to the m-th holding frames received by the first display sub-region is equal.

[0103] Figure 9 This is a waveform diagram corresponding to the frequency switching of the display sub-region in the display panel provided by the embodiment of the present invention. Refer to Figure 1 、 Figure 4 and Figure 9, after receiving the frequency switching instruction, each of the second to the mth holding frames received by the first display sub-region changes according to the same gradient, making waveform control easier to implement. As Figure 9 shown, before the frequency switching in the second display sub-region, to improve the brightness and darkness difference between different display sub-regions, in the first display sub-region, which is the first target display sub-region 1 and the third target display sub-region 3 in this embodiment, the voltages written to the first pole of the driving transistors are both the first voltage. After the frequency switching in the second display sub-region, which is the second target display sub-region 2 in this embodiment, to improve the problem of frequency switching flicker, it is necessary to increase the voltages written to the first pole of the driving transistors T1 of the first target display sub-region 1 and the third target display sub-region 3 to the intermediate voltage A. Then, after several holding frames, it changes from the intermediate voltage A to the second voltage B. In a certain display cycle, in the holding frame t4 of the first target display sub-region 1, the third voltage C is written to the first pole of the driving transistor T1 of the first target display sub-region 1. In the holding frame t5 of the third display sub-region, the third voltage C is written to the first pole of the driving transistor T1 of the first target display sub-region 1. In the holding frame t4 of the first target display sub-region 1, the compensation transistor T3 is turned off and no data refreshing is performed. In the holding frame t5 of the third target display sub-region 3, the compensation transistor T3 is turned off and no data refreshing is performed.

[0104] Optionally, the display panel includes at least three display sub-regions with different refresh frequencies; the first display sub-region with different fixed voltage differences completes the monotonic change from the intermediate voltage to the second voltage within different numbers of holding frames; wherein, the fixed voltage difference is the difference between the intermediate voltage corresponding to the first display sub-region and the second voltage corresponding to the first display sub-region.

[0105] Taking the display panel including Figure 4Taking the three display sub - regions shown as an example, the refresh frequency of the first target display sub - region 1 is 1 Hz, the refresh frequency of the second target display sub - region 2 is 120 Hz, and the refresh frequency of the third target display sub - region 3 is 30 Hz. Since the refresh frequencies of the first target display sub - region 1 and the third target display sub - region 3 are different, and the differences from the refresh frequency of the second target display sub - region 2 are different, the corresponding first voltages and second voltages are different. It is set that the change gradients of the voltages written to the first pole of the driving transistor T1 in each holding frame from the second holding frame to the m - th holding frame when the first target display sub - region 1 receives the frequency - switching instruction in the driving chip and the change gradients of the voltages written to the first pole of the driving transistor T1 in each holding frame from the second holding frame to the m - th holding frame in the third target display sub - region 3 are the same, so as to simplify the design structure and be more conducive to the implementation of the scheme. Among them, the m values corresponding to the first target display sub - region 1 and the third target display sub - region are different. Therefore, when the fixed voltage differences of the first target display sub - region 1 and the third target display sub - region 3 are different, the display sub - region completes the monotonic change from the intermediate voltage to the second voltage within different numbers of holding frames. For example, when performing frequency switching in the display sub - region with the highest refresh frequency, 10 holding frames are set. The first target display sub - region 1 undergoes the change from the corresponding first voltage to the second voltage from the second holding frame to the eighth holding frame, and the voltages written to the first pole of the driving transistor T1 in the remaining holding frames remain at the second voltage. The third target display sub - region 3 undergoes the change from the corresponding intermediate voltage to the second voltage from the first holding frame to the tenth holding frame.

[0106] Optionally, m is greater than or equal to 5 and less than or equal to 30, and specifically can be 5, 8, 10, 12, 15, 18, 20, 25, 37, 30; if m is too small, the bias state cannot be effectively improved, resulting in still existing flicker problems; if m is too large, it is not conducive to the improvement of the light - dark difference. Optionally, m is greater than or equal to 10 and less than or equal to 18; optionally, m is equal to 14 frames.

[0107] S142: After receiving the frequency - switching instruction, in the (m + 1)-th holding frame and each subsequent holding frame of the first display sub - region, write the second voltage corresponding to the first display sub - region to the first pole of the driving transistor in the first display sub - region.

[0108] In the stable state, that is, after the frequency switching is completed and the change from the first voltage to the second voltage in the first display sub - region is completed, maintain the voltage written to the first pole of the driving transistor T1 in the first display sub - region at the second voltage in each holding frame.

[0109] Exemplarily, the refresh frequency of the first target display sub-region 1 is 1 Hz, the refresh frequency of the second target display sub-region 2 is 120 Hz, and the refresh frequency of the third target display sub-region 3 is 30 Hz. Since the difference between the refresh frequency of the second target display sub-region 2 and the refresh frequency of the first target display sub-region 1 is greater than the difference between the refresh frequency of the second target display sub-region 2 and the refresh frequency of the third target display sub-region 3, therefore, the second voltage corresponding to the first target display sub-region 1 is greater than the second voltage corresponding to the third target display sub-region 3. According to the differences in the refresh frequencies, different second voltages are set for different first display sub-regions, so that when the frequency is switched, the hysteresis states of the driving transistors in different first display sub-regions are more consistent, improving the problem of frequency-switching flicker. As for determining the magnitude relationship of the second voltage according to the refresh frequency of the first display sub-region, the determination method of the first voltage can be referred to.

[0110] Reference Figure 1 , Optionally, to improve the brightness difference of display sub-regions with different refresh frequencies, for any display sub-region, in addition to writing a fixed voltage such as the first voltage to the first pole of the driving transistor of the first display sub-region as described above, the first initialization voltage can also be written to the second pole of the driving transistor in each holding frame. The first initialization voltage corresponding to the first display sub-region is different from the first initialization voltage corresponding to the second display sub-region. Specifically, in each holding frame, the first initialization voltage provided by the third initialization signal line Refp is transmitted to the second pole of the driving transistor T1 through the turned-on third initialization transistor T8 to reset the second pole of the driving transistor T1 multiple times, improving the bias state of the driving transistor T1, and thus improving the display uniformity. As for the magnitude of the first initialization voltage written to the first display sub-region in the holding frame, a suitable value can be determined through multiple experiments and is not specifically limited here.

[0111] Continue to refer to Figure 1 , Optionally, to improve the brightness difference of display sub-regions with different refresh frequencies, for any display sub-region, in addition to writing a fixed voltage such as the first voltage to the first pole of the driving transistor of the first display sub-region as described above, the second initialization voltage can also be written to the anode of the light-emitting device OLED in each holding frame. The second initialization voltage corresponding to the first display sub-region is different from the second initialization voltage corresponding to the second display sub-region. Specifically, in each holding frame, the second initialization voltage provided by the second initialization signal line Refn2 is transmitted to the anode of the light-emitting device OLED through the turned-on second initialization transistor T7 to reset the anode of the light-emitting device OLED multiple times, and thus improve the display uniformity. As for the magnitude of the second initialization voltage written to the first display sub-region in the holding frame, a suitable value can be determined through multiple experiments and is not specifically limited here.

[0112] Figure 10Another driving waveform diagram of the display panel provided by the embodiment of the present invention. In this embodiment, for any display sub-region, in each holding frame, a first voltage is written to the first pole of the driving transistor of the first display sub-region. In each holding frame, the first initialization voltage provided by the third initialization signal line Refp is transmitted to the second pole of the driving transistor T1 through the turned-on third initialization transistor T8, and in each holding frame, the second initialization voltage provided by the second initialization signal line Refn2 is transmitted to the anode of the light-emitting device OLED through the turned-on second initialization transistor T7. The three compensation methods work together to jointly improve the brightness difference of the display panel and enhance the display uniformity.

[0113] The embodiment of the present invention provides another driving method for a display panel. The display panel includes at least two display sub-regions with different refresh frequencies; the display panel includes at least one pixel circuit, and the pixel circuit includes a driving transistor; one display cycle of any display sub-region includes at least one refresh frame, and the display cycle of the first display sub-region further includes at least one holding frame;

[0114] Figure 11 A flowchart of another driving method for the display panel provided by the embodiment of the present invention. Refer to Figure 11 , the driving method of the display panel includes:

[0115] S113: If the refresh frequency of the second display sub-region undergoes a frequency switch, for any first display sub-region, after receiving the frequency switch instruction, in the first holding frame to the m-th holding frame of the first display sub-region, control the voltage input to the first pole of the driving transistor in the first display sub-region to be updated from the first voltage corresponding to the first display sub-region to the second voltage corresponding to the first display sub-region; m is an integer greater than or equal to 1; wherein, the first display sub-region is any display sub-region other than the second display sub-region, the second display sub-region is the display sub-region with the highest refresh frequency, the first voltage is the voltage corresponding to the first display sub-region written to the first pole of the driving transistor in the holding frame before the frequency switch of the second display sub-region, and the second voltage is the voltage corresponding to the first display sub-region written to the first pole of the driving transistor in the holding frame after the frequency switch of the second display sub-region is completed.

[0116] As the display progresses, when the frequency needs to be switched in the second display sub-region, such as switching from 120 Hz to 60 Hz, or 80 Hz, or 240 Hz, and the refresh frequency of the first display sub-region remains unchanged, then for any first display sub-region, the difference between the refresh frequency of the first display sub-region and the refresh frequency after the frequency switching of the second display sub-region changes, and correspondingly, the voltage of the first pole of the driving transistor that maintains the frame writing will also change accordingly. Therefore, after receiving the frequency switching instruction, within at least one holding frame corresponding to the first display sub-region, it is necessary to control the voltage input to the first pole of the driving transistor in the first display sub-region to change from the first voltage corresponding to the first display sub-region to the second voltage corresponding to the first display sub-region, so that after the frequency switching of the second display sub-region is completed, the hysteresis states of each display sub-region still remain consistent, improving the display uniformity and the display effect.

[0117] Further, S113 includes:

[0118] After receiving the frequency switching instruction, in the first holding frame of the first display sub-region, update the first voltage corresponding to the first display sub-region to an intermediate voltage; the intermediate voltage is greater than the first voltage;

[0119] After receiving the frequency switching instruction, in the second to the m-th holding frames of the first display sub-region, control the voltage of the first pole of the driving transistor input to the first display sub-region to monotonically change from the intermediate voltage corresponding to the first display sub-region to the second voltage corresponding to the first display sub-region; the intermediate voltage is greater than the second voltage and greater than the first voltage;

[0120] Optionally, the second voltage is greater than or equal to 4.25 V and less than or equal to 5.5 V;

[0121] The first voltage is greater than or equal to 4.25 V and less than or equal to 5.5 V.

[0122] Optionally, for any first display sub-region, after receiving the frequency switching instruction, the difference between the voltages of the first poles of the driving transistors input to the first display sub-region in every two adjacent holding frames from the second to the m-th holding frames of the first display sub-region is equal.

[0123] Optionally, m = 1. After receiving the frequency switching, in the first holding frame of the first display sub-region, control the voltage of the first pole of the driving transistor input to the first display sub-region to be updated to the second voltage corresponding to the first display sub-region.

[0124] An embodiment of the present invention further provides a display device, including a display panel and a driving chip, where the driving chip is configured to execute the driving method of the display panel in any of the above embodiments. In this embodiment, for any first display sub-region of the display device, in the holding frame of the first display sub-region, a first voltage corresponding to the first display sub-region is written to a first pole of each driving transistor in the first display sub-region, so that the voltage difference between the gate and the source of the driving transistor changes, thereby changing the bias state of the driving transistor. By adjusting the voltage written to the first pole of the driving transistor in the low refresh frequency region to an appropriate voltage value, i.e., the first voltage, the hysteresis state of the driving transistor in the low refresh frequency region is changed. During the full refresh frame, the voltage charged into the storage capacitor changes accordingly, so that the brightness of the low refresh frequency region and the high refresh frequency region is adjusted to be consistent, improving the brightness difference between display regions with different refresh frequencies. Alternatively, when the second display sub-region needs to perform frequency switching, the difference in the refresh frequencies between the corresponding first display sub-region and the second display sub-region changes, and then the corresponding first voltage to be written also changes accordingly. After the refresh frequency switching of the second display sub-region is completed, within at least one holding frame corresponding to the first display sub-region, the voltage input to the first pole of the driving transistor in the first display sub-region is controlled to change from the first voltage corresponding to the first display sub-region to the second voltage corresponding to the first display sub-region, so that after the refresh frequency switching of the second display sub-region is completed, the hysteresis states of all display sub-regions still remain consistent, improving the display uniformity and the display effect.

[0125] An embodiment of the present invention further provides a display device, including the display device described above. Figure 12 It is a schematic structural diagram of a display device provided by an embodiment of the present invention. Refer to Figure 12 , the display device may be Figure 12 the mobile phone shown in the figure, or may also be a computer, a television, a smart wearable display device, etc. The embodiments of the present invention do not make special limitations thereto.

[0126] It should be understood that various forms of the processes shown above can be used, steps can be reordered, added, or deleted. For example, the steps described in the present invention can be executed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of the present invention can be achieved. There is no limitation herein.

[0127] The above specific embodiments do not constitute a limitation to the protection scope of the present invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A method for driving a display panel, characterized in that: The display panel comprises at least two display sub-areas with different refresh frequencies; the display panel comprises at least one pixel circuit, and the pixel circuit comprises a driving transistor; a display cycle of any display sub-area comprises at least one refresh frame, and a display cycle of the first display sub-area further comprises at least one hold frame; The driving method of the display panel includes: For any of the first display sub-areas, in a holding frame of the first display sub-area, a first voltage corresponding to the first display sub-area is written into a first electrode of a driving transistor in the first display sub-area; wherein the first display sub-area is any of the display sub-areas except the second display sub-area, and the second display sub-area is the display sub-area with the highest refresh frequency.

2. The method for driving a display panel according to claim 1, wherein: Before the step of writing the first voltage corresponding to the first display sub-area into the first electrode of the driving transistor in the first display sub-area in a holding frame of the first display sub-area for any of the first display sub-areas, the step further includes: For any of the first display sub-areas, determining a first voltage corresponding to the first display sub-area according to a refresh frequency of the first display sub-area and a refresh frequency of the second display sub-area; Preferably, the first voltage is greater than or equal to 4.25V and less than or equal to 5.5V.

3. The method for driving a display panel according to claim 2, wherein: For any of the first display sub-areas, the first voltage corresponding to the first display sub-area is positively correlated with the difference in refresh frequency; wherein the difference in refresh frequency is the difference between the refresh frequency of the second display sub-area and the refresh frequency of the first display sub-area.

4. The method for driving a display panel according to claim 1, wherein: The display panel driving method further includes: If the refresh frequency of the second display sub-area is switched, for any of the first display sub-areas, after receiving the frequency switching instruction, in the first holding frame to the mth holding frame of the first display sub-area, the voltage of the first electrode of the driving transistor in the first display sub-area is controlled to be updated to the second voltage corresponding to the first display sub-area; m is an integer greater than or equal to 1; The second voltage is the voltage of the first electrode of the driving transistor written in the first display sub-area in the corresponding holding frame after the frequency switching of the second display sub-area is completed; Preferably, the second voltage is greater than or equal to 4.25V and less than or equal to 5.5V.

5. The method for driving a display panel according to claim 4, characterized in that: m is greater than 1, and after receiving the frequency switching instruction, in the first holding frame to the mth holding frame of the first display sub-area, controlling the voltage of the first electrode of the driving transistor input to the first display sub-area to be updated to the second voltage corresponding to the first display sub-area includes: After receiving the frequency switching instruction, in a first holding frame of the first display sub-area, updating the first voltage corresponding to the first display sub-area to an intermediate voltage; the intermediate voltage is greater than the first voltage; After receiving the frequency switching instruction, in the second holding frame to the mth holding frame of the first display sub-area, the voltage of the first electrode of the driving transistor in the first display sub-area is controlled to change monotonically from the intermediate voltage corresponding to the first display sub-area to the second voltage corresponding to the first display sub-area; the intermediate voltage is greater than the second voltage.

6. The method for driving a display panel according to claim 5, characterized in that: For any of the first display sub-areas, the intermediate voltage corresponding to the first display sub-area is greater than the larger one of the first voltage and the second voltage, and is less than the data voltage corresponding to when the pixel circuit displays a black picture.

7. The method for driving a display panel according to claim 5, characterized in that , said m is greater than or equal to 5 and less than or equal to 30; Preferably, m is greater than or equal to 10 and less than or equal to 18; Preferably, m is equal to 14.

8. The method for driving a display panel according to claim 5, wherein: For any first display sub-area, after receiving the frequency switching instruction, the difference in voltage of the first electrode of the driving transistor in the first display sub-area in each two adjacent holding frames from the second holding frame to the mth holding frame of the first display sub-area is equal.

9. The method for driving a display panel according to claim 5, wherein: The display panel comprises at least three display sub-areas with different refresh frequencies; The first display sub-area with different fixed voltage difference completes the monotonic change from the intermediate voltage to the second voltage within different numbers of holding frames; wherein the fixed voltage difference is the difference between the intermediate voltage corresponding to the first display sub-area and the second voltage corresponding to the first display sub-area.

10. The method for driving a display panel according to claim 4, wherein: m＝1， After receiving the frequency switching instruction, in a first holding frame of the first display sub-area, the voltage of the first electrode of the driving transistor in the first display sub-area is controlled to be updated to a second voltage corresponding to the first display sub-area.

11. The method for driving a display panel according to any one of claims 4 to 10, characterized in that: After receiving the frequency switching instruction, in the first holding frame to the mth holding frame of the first display sub-area, after the step of controlling the voltage of the first electrode of the driving transistor input to the first display sub-area to be updated to the second voltage corresponding to the first display sub-area, the method further includes: After receiving the frequency switching instruction, in the (m+1)th holding frame of the first display sub-area and each holding frame thereafter, the second voltage corresponding to the first display sub-area is written into the first electrode of the driving transistor in the first display sub-area.

12. The method for driving a display panel according to claim 1, wherein: The display panel driving method further includes: For any display sub-area, a first initialization voltage is written into the second electrode of the driving transistor in each holding frame; the first initialization voltage corresponding to the first display sub-area is different from the first initialization voltage corresponding to the second display sub-area.

13. The method for driving a display panel according to claim 1, wherein: The pixel circuit further includes a light emitting device, and the driving method of the display panel further includes: For any display sub-area, a second initialization voltage is written into the anode of the light-emitting device in each holding frame; the second initialization voltage corresponding to the first display sub-area is different from the second initialization voltage corresponding to the second display sub-area.

14. The method for driving a display panel according to claim 1, wherein: The display panel driving method further includes: For any of the display sub-areas, in a refresh frame of the display sub-area, a data voltage corresponding to the display sub-area is written into a first electrode of a driving transistor of the display sub-area.

15. A method for driving a display panel, characterized in that: The display panel comprises at least two display sub-areas with different refresh frequencies; the display panel comprises at least one pixel circuit, and the pixel circuit comprises a driving transistor; a display cycle of any display sub-area comprises at least one refresh frame, and a display cycle of the first display sub-area further comprises at least one hold frame; The driving method of the display panel includes: If the refresh frequency of the second display sub-area is switched, for any of the first display sub-areas, after receiving the frequency switching instruction, in the first holding frame to the mth holding frame of the first display sub-area, the first voltage of the first electrode of the driving transistor in the first display sub-area is controlled to be updated to the second voltage corresponding to the first display sub-area; m is an integer greater than or equal to 1; Among them, the first display sub-area is any display sub-area except the second display sub-area, the second display sub-area is the display sub-area with the highest refresh frequency, the first voltage is the voltage of the first electrode of the driving transistor written in the first display sub-area in a holding frame corresponding to the frequency switching of the second display sub-area before the frequency switching of the second display sub-area is completed; the second voltage is the voltage of the first electrode of the driving transistor written in the first display sub-area in a holding frame corresponding to the frequency switching of the second display sub-area.

16. The method for driving a display panel according to claim 15, characterized in that: m is greater than 1, and after receiving the frequency switching instruction, in the first holding frame to the mth holding frame of the first display sub-area, controlling the first voltage of the first electrode of the driving transistor input to the first display sub-area to be updated to the second voltage corresponding to the first display sub-area includes: After receiving the frequency switching instruction, in a first holding frame of the first display sub-area, updating the first voltage corresponding to the first display sub-area to an intermediate voltage; the intermediate voltage is greater than the first voltage; After receiving the frequency switching instruction, in the second holding frame to the mth holding frame of the first display sub-area, the voltage of the first electrode of the driving transistor in the first display sub-area is controlled to change monotonically from the intermediate voltage corresponding to the first display sub-area to the second voltage corresponding to the first display sub-area; the intermediate voltage is greater than the second voltage and greater than the first voltage; Preferably, the second voltage is greater than or equal to 4.25V and less than or equal to 5.5V; Preferably, the first voltage is greater than or equal to 4.25V and less than or equal to 5.5V.

17. The method for driving a display panel according to claim 16, wherein: For any first display sub-area, after receiving the frequency switching instruction, the difference in voltage of the first electrode of the driving transistor in the first display sub-area in each two adjacent holding frames from the second holding frame to the mth holding frame of the first display sub-area is equal.

18. The method for driving a display panel according to claim 15, wherein: m＝1， After receiving the frequency switching instruction, in a first holding frame of the first display sub-area, the voltage of the first electrode of the driving transistor in the first display sub-area is controlled to be updated to a second voltage corresponding to the first display sub-area.

19. A display device comprising a display panel and a driving chip, wherein the driving chip is used to execute the display panel driving method according to any one of claims 1 to 18.

20. A display device, characterized in that: A display device comprising the display device of claim 19.

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