Display panel, driving method thereof, and display device

Abstract

This application relates to a display panel, its driving method, and a display device. The method includes: obtaining the refresh mode of the display panel at the current moment; then, if the refresh mode at the current moment is non-segmented frequency, resetting the driving transistors of the display panel using a first reset voltage; and if the refresh mode at the current moment is segmented frequency, resetting the driving transistors of the display panel using a second reset voltage, wherein the second reset voltage is different from the first reset voltage. Thus, under different refresh modes of the display panel, i.e., non-segmented frequency or segmented frequency, this embodiment of the application uses different reset voltages to reset the driving transistors of the display panel, thereby improving the flickering caused by the threshold voltage offset of the driving transistors when switching between different refresh modes and improving the display effect.

Description

Technical Field

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

[0002] With the development of display technology, display panel sizes have become increasingly larger. To fully utilize the display area, related technologies have proposed partitioned display, where different user interfaces are simultaneously displayed in different partitions within the same display panel. For example, one partition might display a video while another displays information, or one partition might display an image while another remains dark. Correspondingly, to reduce energy consumption, different display partitions use different refresh rates. However, in these technologies, when the display panel switches from a non-partitioned refresh rate display to a partitioned refresh rate display, flickering occurs, resulting in poor display quality. Summary of the Invention

[0003] Therefore, it is necessary to provide a display panel that can improve display panel flicker and enhance display effect, as well as a driving method and display device thereof.

[0004] In a first aspect, a method for driving a display panel is provided, the method comprising:

[0005] Obtain the current refresh mode of the display panel, wherein the refresh mode includes non-divided frequency and divided frequency;

[0006] When the refresh mode is non-divided frequency, the first reset voltage is used to reset the driving transistors of the display panel.

[0007] When the refresh mode is divided into zones and frequencies at the current moment, the driving transistors of the display panel are reset using a second reset voltage, which is different from the first reset voltage.

[0008] In one embodiment, the method further comprises:

[0009] When the refresh mode of the display panel is non-divided frequency and the refresh frequency at the current moment is different from the refresh frequency at the previous moment, the first brightness difference between the current moment and the previous moment of the display panel is obtained, and the first reset voltage of the display panel is determined based on the first brightness difference.

[0010] Optionally, if the refresh frequency at the current moment is greater than the refresh frequency at the previous moment, the first reset voltage is positively correlated with the first brightness difference; if the refresh frequency at the current moment is less than the refresh frequency at the previous moment, the first reset voltage is negatively correlated with the first brightness difference.

[0011] In one embodiment, the method further comprises:

[0012] When the refresh mode at the current moment is segmented frequency and the refresh mode at the previous moment is non-segmented frequency, the second brightness difference between the current moment and the previous moment of the display panel is obtained, and the second reset voltage of the display panel is determined based on the second brightness difference.

[0013] Optionally, if the refresh rate of one of the display zones of the display panel at the current moment is greater than the refresh rate of the display panel at the previous moment, the second reset voltage is positively correlated with the second brightness difference; if the refresh rate of one of the display zones of the display panel at the current moment is less than the refresh rate of the display panel at the previous moment, the second reset voltage is negatively correlated with the second brightness difference.

[0014] In one embodiment, the method further comprises:

[0015] When the refresh mode of the display panel is divided into zones and the refresh frequency of one of the display zones is different from the refresh frequency of the previous time, the third brightness difference between the current time and the previous time of the display zone is obtained, and the third reset voltage of the display zone is determined based on the third brightness difference.

[0016] Optionally, if the refresh rate of the display partition at the current moment is greater than the refresh rate at the previous moment, the third reset voltage is positively correlated with the third brightness difference; if the refresh rate of the display partition at the current moment is less than the refresh rate at the previous moment, the third reset voltage is negatively correlated with the third brightness difference.

[0017] In one embodiment, the display panel includes multiple display zones, and the method further includes:

[0018] When the refresh mode of the display panel is zoned frequency, the data voltage of the hold frame of each display zone is determined according to the refresh frequency of each display zone, wherein the data voltage of the hold frame of at least two display zones is different.

[0019] In one embodiment, in two display partitions with different refresh rates, the data voltage of the hold frame of the display partition with the lower refresh rate is greater than the data voltage of the hold frame of the display partition with the higher refresh rate.

[0020] In one embodiment, the method further comprises:

[0021] When the refresh mode of the display panel is non-divided frequency, the current refresh frequency of the display panel is obtained, and the data voltage corresponding to the current refresh frequency is output to the display panel during the hold frame of the display panel.

[0022] Optionally, as the refresh rate decreases, the data voltage output to the display panel while maintaining the frame increases.

[0023] Secondly, embodiments of this application also provide a display panel, including a display driving circuit, multiple reset lines, multiple data lines, and multiple pixel circuits arranged in an array, wherein the multiple reset lines are used to transmit a first reset voltage, a second reset voltage, and a third reset voltage, and the data lines are used to transmit data voltages; the display driving circuit is connected to the corresponding pixel circuit through the corresponding reset lines, and the display driving circuit is connected to the corresponding pixel circuit through the corresponding data lines, and the display driving circuit is used to execute the driving method of the display panel as described in the first aspect.

[0024] In one embodiment, the pixel circuitry includes:

[0025] Thirdly, a display device is provided, which includes a display panel as described in the second aspect.

[0026] The aforementioned display panel, its driving method, and display device obtain the current refresh mode of the display panel. When the current refresh mode is non-segmented frequency, a first reset voltage is used to reset the driving transistors of the display panel. When the current refresh mode is segmented frequency, a second reset voltage is used to reset the driving transistors of the display panel. The second reset voltage is different from the first reset voltage. Thus, under different refresh modes of the display panel—non-segmented frequency or segmented frequency—this embodiment uses different reset voltages to reset the driving transistors of the display panel, thereby improving the flickering caused by the threshold voltage shift of the driving transistors when switching between different refresh modes and improving the display effect. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of a display panel without frequency division according to one embodiment;

[0029] Figure 2 This is a schematic diagram illustrating the segmentation and frequency division of a display panel according to one embodiment;

[0030] Figure 3This is one of the flowcharts illustrating a method for driving a display panel according to an embodiment;

[0031] Figure 4 This is a second schematic flowchart of a display panel driving method according to one embodiment;

[0032] Figure 5 This is a third flowchart illustrating a method for driving a display panel according to one embodiment;

[0033] Figure 6 This is a fourth flowchart illustrating a method for driving a display panel according to one embodiment.

[0034] Figure 7 This is a schematic diagram of the write frame and hold frame of a display panel according to one embodiment;

[0035] Figure 8 Fifth of a flowchart illustrating a method for driving a display panel according to an embodiment;

[0036] Figure 9 This is a schematic diagram of the structure of a pixel circuit according to one embodiment;

[0037] Figure 10 This is a sixth flowchart illustrating a method for driving a display panel according to one embodiment;

[0038] Figure 11 This is a schematic diagram of a display device according to one embodiment. Detailed Implementation

[0039] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0041] It is understood that the terms "first," "second," etc., used herein may be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, without departing from the scope of this application, a first resistor may be referred to as a second resistor, and similarly, a second resistor may be referred to as a first resistor. Both the first resistor and the second resistor are resistors, but they are not the same resistor.

[0042] It can be understood that the “connection” in the following embodiments should be understood as “electrical connection”, “communication connection”, etc. if there is transmission of electrical signals or data between the connected circuits, modules, units, etc.

[0043] It is understandable that "at least one" refers to one or more, and "multiple" refers to two or more. "At least a part of an element" refers to part or all of an element.

[0044] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising / including” or “having,” etc., specify the presence of the stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. Meanwhile, the term “and / or” as used in this specification includes any and all combinations of the associated listed items.

[0045] As mentioned in the background section, in related technologies, when the display panel switches from non-regionalized to region-based frequency division, the display panel exhibits flickering. The inventors have discovered that the reason for this is:

[0046] Typically, a display panel includes multiple light-emitting elements arranged in an array and multiple pixel circuits arranged in an array. The light-emitting elements are, for example, organic light-emitting diodes (OLEDs). The pixel circuits are connected to the corresponding light-emitting elements and are used to drive them. A typical pixel circuit consists of devices such as thin-film transistors (TFTs) and capacitors. The driving TFTs (or simply driving transistors) generate a driving current, and the light-emitting elements emit light in response to this driving current.

[0047] The refresh modes of the display panel include non-zoned refresh rate and zoned refresh rate. The display panel includes a non-display area and a display area, with the non-display area surrounding the display area. Non-zoned refresh rate means that all positions within the entire display area use the same refresh rate. (Refer to...) Figure 1 The entire display area uses a refresh rate of F1; zoned refresh rate means that the entire display area is divided into multiple display zones, and different display zones can use different refresh rates. (See reference...) Figure 2 The entire display area is divided into three display partitions. The top and bottom display partitions both use a refresh rate of F2, while the middle display partition uses a refresh rate of F3.

[0048] During the current refresh process, the driving transistors need to be reset to eliminate the threshold voltage shift of the driving transistors after the previous refresh. Resetting the driving transistors involves using a reset voltage to reset both the source and drain of the driving transistors. When the display panel switches from non-divided to divided frequency, the refresh frequency changes. The reset voltage used in non-divided frequency switching is no longer applicable to resetting the driving transistors in divided frequency switching. In other words, the reset voltage used in non-divided frequency switching is not suitable for resetting the driving transistors in divided frequency switching. However, in related technologies, the same reset voltage is used for both non-divided and divided frequency switching, causing the driving transistors to not be properly reset when the display panel switches from non-divided to divided frequency switching. This results in a large shift in the threshold voltage, causing the display panel to flicker, i.e., frequency switching flicker.

[0049] In view of this, this application provides a driving method for a display panel to solve the above-mentioned technical problem of flickering and improve the display effect.

[0050] The display panel driving method provided in this application embodiment can be applied to OLED display panels, for example. The display panel driving method provided in this application embodiment can be, but is not limited to, executed by a display driver IC (DDIC) in the display panel.

[0051] In one exemplary embodiment, reference is made to Figure 3 A method for driving a display panel is provided, the method comprising the following steps S302 to S306.

[0052] S302, obtain the current refresh mode of the display panel, the refresh mode includes non-zoned frequency and zoned frequency.

[0053] The display panel includes a non-display area and a display area, with the non-display area surrounding the display area; non-regional refresh rate means that all positions within the entire display area use the same refresh rate, as referenced. Figure 1 The entire display area uses a refresh rate of F1; zoned refresh rate means that the entire display area is divided into multiple display zones, and different display zones can use different refresh rates. (See reference...) Figure 2 The entire display area is divided into three display zones. The top and bottom display zones both use a refresh rate of F2, while the middle display zone uses a refresh rate of F3. The display panel's refresh mode can remain at a non-zoned refresh rate, remain at a zoned refresh rate, switch between non-zoned and zoned refresh rates, and switch between zoned and non-zoned refresh rates.

[0054] S304, when the refresh mode is non-divided frequency, uses the first reset voltage to reset the driving transistor of the display panel.

[0055] The first reset voltage can be, but is not limited to, provided by the DDIC to each pixel circuit of the display panel. It is understood that when the refresh mode of the display panel is non-divided frequency, the first reset voltage is used to reset the source and drain of the driving transistors of each pixel circuit of the display panel.

[0056] The first reset voltage is used to reset the driving transistors in non-division frequency mode, so as to achieve good reset of the driving transistors of each pixel circuit of the display panel in non-division frequency mode. The first reset voltage can be a preset value preset in DDIC; the first reset voltage can also be obtained in real time according to the refresh frequency at the current moment. For example, DDIC stores multiple first reset voltages corresponding to multiple different refresh frequencies, so DDIC can obtain the corresponding first reset voltage according to the refresh frequency at the current moment. It is understood that the specific value of the first reset voltage is not only related to the refresh frequency of the display panel, but may also be related to the number of light-emitting elements of the display panel, the refresh mode of the display panel at the previous moment, and the refresh frequency of the display panel at the previous moment.

[0057] S306, when the refresh mode is segmented frequency at the current moment, the drive transistor of the display panel is reset using a second reset voltage, which is different from the first reset voltage.

[0058] The second reset voltage can be, but is not limited to, provided by the DDIC to each pixel circuit of the display panel. It is understood that when the display panel's refresh mode is frequency-division, the second reset voltage is used to reset the source and drain of the driving transistors in each pixel circuit of the display panel.

[0059] The second reset voltage is used to reset the driving transistors under segmented frequency division, so as to achieve a good reset of the driving transistors of each pixel circuit of the display panel under segmented frequency division. The second reset voltage can be a preset value preset in the DDIC; the second reset voltage can also be obtained in real time according to the refresh frequency of each display segment at the current moment. For example, the DDIC stores multiple second reset voltages corresponding to different combinations of refresh frequency of display segments, so the DDIC can obtain the corresponding second reset voltage according to the refresh frequency combination of the display segments at the current moment. For example, one combination of refresh frequency of display segments is F2=1Hz, F3=60Hz, while another combination of refresh frequency of display segments is F2=60Hz, F3=120Hz. The second reset voltages corresponding to these two combinations of refresh frequency of display segments can be different. It is understood that the specific value of the second reset voltage is not only related to the above-mentioned refresh frequency combination of display segments, but may also be related to the number of light-emitting elements in each display segment, the number of light-emitting elements in the display panel, the refresh mode of the display panel at the previous moment, and the refresh frequency of the display panel at the previous moment.

[0060] In this embodiment of the application, different reset voltages are used to reset the driving transistors of each pixel circuit of the display panel under different refresh modes, namely, non-division frequency or division frequency. The first reset voltage is suitable for resetting the driving transistors under non-division frequency, and the second reset voltage is suitable for resetting the driving transistors under division frequency. This improves the flickering caused by the threshold voltage offset of the driving transistors when switching between different refresh modes and improves the display effect.

[0061] Based on the above, in the embodiments of this application, the inventors have discovered that the main cause of frequency switching flicker (i.e., flickering caused by switching refresh frequencies) is that the threshold voltage of the driving transistor is not properly reset before and after the switch. Therefore, improving the reset of the driving transistor before and after the switch is beneficial to improving frequency switching flicker. Improving the reset of the driving transistor before and after the switch can be achieved by adjusting the reset voltage. The following is an exemplary description of the frequency switching flicker that may be involved in the display panel and the method for improving frequency switching flicker in the embodiments of this application, but it is not intended to limit the present invention:

[0062] In one exemplary embodiment, reference is made to Figure 4 The driving method for the display panel also includes the following steps S402~S404.

[0063] S402, when the refresh mode of the display panel is non-divided frequency and the refresh frequency at the current moment is different from the refresh frequency at the previous moment, obtain the first brightness difference between the current moment and the previous moment of the display panel.

[0064] S404, determine the first reset voltage of the display panel based on the first brightness difference.

[0065] In this embodiment, when the refresh mode of the display panel remains in non-divided frequency mode and the refresh frequency at the current moment is different from the refresh frequency at the previous moment (e.g., F1=60Hz at the current moment and F1=10Hz at the previous moment), in order to improve the frequency switching flicker that may be caused by the switching of refresh frequency in non-divided frequency mode, considering that improving the frequency switching flicker is mainly achieved by improving the brightness difference at the time of frequency switching, this embodiment obtains the first brightness difference between the current moment and the previous moment of the display panel, determines the first reset voltage of the display panel based on the first brightness difference, and determines the appropriate first reset voltage of the display panel at the current moment based on the first brightness difference, thereby improving the brightness difference at the time of frequency switching, and thus improving the frequency switching flicker that may be caused by the switching of refresh frequency in non-divided frequency mode.

[0066] Optionally, when the refresh frequency at the current moment is greater than the refresh frequency at the previous moment, the first reset voltage is positively correlated with the first brightness difference. That is, when switching from a low frequency to a high frequency refresh, the larger the first brightness difference, the larger the first reset voltage, thereby improving the offset of the driving transistor threshold voltage when switching from a low frequency to a high frequency refresh, and improving the frequency switching flicker when switching from a low frequency to a high frequency refresh.

[0067] Optionally, when the refresh frequency at the current moment is lower than the refresh frequency at the previous moment, the first reset voltage is negatively correlated with the first brightness difference. That is, when switching from high frequency to low frequency refresh, the larger the first brightness difference, the smaller the first reset voltage, thereby improving the offset of the driving transistor threshold voltage when switching from high frequency to low frequency refresh and improving the frequency switching flicker when switching from high frequency to low frequency refresh.

[0068] In one exemplary embodiment, reference is made to Figure 5 The driving method for the display panel also includes the following steps S502~S504.

[0069] S502, when the refresh mode at the current moment is zoned frequency and the refresh mode at the previous moment is non-zoned frequency, obtain the second brightness difference between the current moment and the previous moment of the display panel.

[0070] S504, determine the second reset voltage of the display panel based on the second brightness difference.

[0071] In the case of switching the display panel from non-zoned to zoned frequency, in order to improve the frequency switching flicker that may be caused by the refresh rate change when switching the display panel from non-zoned to zoned frequency, considering that improving the frequency switching flicker is mainly achieved by improving the brightness difference during frequency switching, this embodiment obtains the second brightness difference between the current moment and the previous moment of the display panel, determines the second reset voltage of the display panel based on the second brightness difference, and determines the appropriate second reset voltage of the display panel at the current moment based on the second brightness difference, thereby improving the brightness difference during frequency switching, and thus improving the frequency switching flicker that may be caused by the refresh rate change when switching the display panel from non-zoned to zoned frequency.

[0072] Optionally, if the refresh rate of one of the display zones on the display panel at the current moment is greater than the refresh rate of the display panel at the previous moment, the second reset voltage is positively correlated with the second brightness difference. For example, when the display panel switches from F1=60Hz to F2=60Hz and F3=120Hz, the larger the second brightness difference, the larger the second reset voltage, thereby improving the frequency switching flicker in this case.

[0073] Optionally, if the refresh rate of one of the display zones of the display panel at the current moment is lower than the refresh rate of the display panel at the previous moment, the second reset voltage is negatively correlated with the second brightness difference. For example, when the display panel switches from F1=120Hz to F2=60Hz and F3=120Hz, the larger the second brightness difference, the smaller the second reset voltage, thereby improving the frequency switching flicker in this case.

[0074] In one exemplary embodiment, reference is made to Figure 6 The driving method for the display panel also includes the following steps S602~S604.

[0075] S602, when the refresh mode of the display panel is divided into zones and the refresh frequency of one of the display zones is different from the refresh frequency of the previous moment, obtain the third brightness difference between the current moment and the previous moment of the display zone.

[0076] S604 determines the third reset voltage of the display zone based on the third brightness difference.

[0077] In this embodiment, when the display panel maintains segmented refresh rates, and the current refresh rate of one of the display segments differs from the previous refresh rate (i.e., when the display panel switches from one refresh rate combination to another), to mitigate the flickering that may occur during refresh rate switching, considering that improving flickering primarily involves improving the brightness difference during frequency switching, this embodiment obtains the third brightness difference between the current and previous times for each display segment. Based on this third brightness difference, a third reset voltage for each display segment is determined, and an appropriate third reset voltage for the current time is determined. This improves the brightness difference during frequency switching in each display segment, thereby reducing flickering that may occur due to refresh rate switching. It is understood that the third reset voltages for each display segment can be the same or different.

[0078] Optionally, if the refresh rate of the display partition at the current moment is greater than the refresh rate at the previous moment, the third reset voltage is positively correlated with the third brightness difference. For example, for any display partition, when switching from a low-frequency refresh rate to a high-frequency refresh rate, the third reset voltage of that display partition is positively correlated with the third brightness difference, thereby improving the frequency switching flicker of that display partition in this case.

[0079] Optionally, if the refresh rate of the display partition at the current moment is lower than the refresh rate at the previous moment, the third reset voltage is negatively correlated with the third brightness difference. For example, for any display partition, when switching from a high-frequency refresh rate to a low-frequency refresh rate, the third reset voltage of that display partition is positively correlated with the third brightness difference, thereby improving the frequency switching flicker of that display partition in this case.

[0080] Furthermore, in the embodiments of this application, the inventors discovered through research that the display panel, in addition to frequency switching flicker, also exhibits static flicker; wherein, static flicker refers to the display panel still flickering at low refresh rates even when the refresh rate is not switched; the reason for static flickering of the display panel is as follows:

[0081] refer to Figure 7 The display panel refreshes at a low frequency ( Figure 7 Taking 60Hz as a low frequency example, the display panel's frame update cycle includes write frames and hold frames; the display panel refreshes at high frequencies (using 60Hz as a low frequency example). Figure 7(Using 120Hz as an example, the display panel's refresh cycle includes write frames but no hold frames.) In a write frame, the gate of the driving transistor in the pixel circuit writes data voltage; in a hold frame, the gate of the driving transistor does not write data voltage, but instead holds the data voltage written in the write frame. Because the refresh cycle is longer at low frequencies, the hold frames within that cycle are longer and more numerous. This causes leakage current to appear at the gate of the driving transistor in the hold frame, ultimately resulting in a difference in brightness between the hold and write frames, manifesting as static flicker.

[0082] In view of this, embodiments of this application provide a driving method for a display panel to solve the above-mentioned technical problem of static flicker and improve the display effect.

[0083] In one exemplary embodiment, reference is made to Figure 8 The driving method for the display panel also includes step S802.

[0084] S802, when the refresh mode of the display panel is non-divided frequency, obtains the current refresh frequency of the display panel, and outputs a data voltage corresponding to the current refresh frequency to the display panel during the hold frame of the display panel.

[0085] in, Figure 9 An exemplary pixel circuit is illustrated, comprising a driving transistor T1, a storage capacitor, a data writing transistor T2, a threshold compensation transistor T3, an initialization transistor T4, a first light-emitting control transistor T5, a second light-emitting control transistor T6, a first reset transistor T7, and a second reset transistor. The first reset transistor T7 is used to reset the source and drain of the driving transistor T1 according to a reset voltage Vrefp. In a write frame: the data writing transistor T2 is turned on, and the data voltage VDATA on the data line is written to the gate of the driving transistor T1 sequentially through the data writing transistor T2, the driving transistor T1, and the threshold compensation transistor T3. In a hold frame: the data writing transistor T2 is turned off, and the gate of the driving transistor T1 does not write data voltage; instead, it holds the data voltage written in the write frame.

[0086] Because parasitic capacitance exists between the data lines and the gates of the driving transistors in the pixel circuit layout, this embodiment adjusts the data voltage on the data lines to an appropriate value during frame holding. This ensures that when the data voltage on the data lines is coupled to the gate of the driving transistor, it can compensate for leakage current at the gate of the driving transistor, thereby improving the brightness difference between the hold frame and the write frame and reducing static flicker. Considering that different refresh rates of the display panel correspond to different levels of leakage current in the driving transistors, a lower refresh rate allows more time for leakage current in the driving transistors, resulting in greater leakage current, and vice versa. Therefore, the data voltage on the data lines of the hold frame can be adjusted according to the refresh rate of the display panel. For example, the data voltage on the data lines of the hold frame and the refresh rate of the display panel can have a one-to-one correspondence.

[0087] Optionally, as the refresh rate decreases, the data voltage output to the display panel during the hold frame increases. That is, the greater the leakage current of the driving transistor, the greater the data voltage output to the display panel during the hold frame. This allows the leakage current of the driving transistor's gate to be compensated using the effect of parasitic capacitance, thereby improving the brightness difference between the hold frame and the write frame and reducing static flicker.

[0088] In one exemplary embodiment, reference is made to Figure 10 The driving method for the display panel also includes step S1002.

[0089] S1002, when the refresh mode of the display panel is zoned frequency, the data voltage of the holding frame of each display zone is determined according to the refresh frequency of each display zone, wherein the data voltage of the holding frame of at least two display zones is different.

[0090] In this display panel, under the segmented frequency design, some display segments use a low refresh rate. For example, in the combination of F2=60Hz and F3=120Hz, the upper and lower display segments use low-frequency refresh, while the middle display segment uses high-frequency refresh. In this case, the gates of the driving transistors of the upper and lower display segments show significant leakage during the hold frame, and a significant brightness difference appears between the write frame and the hold frame of the upper and lower display segments, resulting in static flicker in both the upper and lower display segments. In this embodiment, the data voltage on the data lines of the upper and lower display segments can be adjusted to an appropriate value during the hold frame, thereby compensating for the leakage of the driving transistors, improving the brightness difference between the write frame and the hold frame of the upper and lower display segments, and thus improving the static flicker of the upper and lower segments.

[0091] Optionally, in two display zones with different refresh rates, the data voltage of the hold frame in the display zone with the lower refresh rate is greater than the data voltage of the hold frame in the display zone with the higher refresh rate. That is, the greater the leakage current of the driving transistor, the greater the data voltage output to the display panel in the hold frame, and vice versa. This is to utilize the effect of parasitic capacitance to compensate for the leakage current of the gate of the driving transistor, thereby improving the brightness difference between the hold frame and the write frame and reducing static flicker.

[0092] Based on the same inventive concept, embodiments of this application also provide a display panel, which includes a display driving circuit (DDIC), multiple reset lines, multiple data lines, and multiple pixel circuits arranged in an array. The multiple reset lines are used to transmit a first reset voltage, a second reset voltage, and a third reset voltage, and the data lines are used to transmit data voltages. The display driving circuit is connected to the corresponding pixel circuit through the corresponding reset lines, and the display driving circuit is also connected to the corresponding pixel circuit through the corresponding data lines. The display driving circuit is used to execute the driving method of the display panel provided in any of the above embodiments. Optionally, the pixel circuits in the display panel can be as follows: Figure 9 As shown.

[0093] The display panel and the driving method for the display panel provided in the embodiments of this application belong to the same inventive concept, can solve the same technical problem, and thus achieve the same technical effect. Repeated content will not be described again.

[0094] Based on the same inventive concept, this application also provides a display device, which may be an OLED display device, see reference. Figure 11 The display device includes a display panel as provided in any of the above embodiments, such as a mobile phone, computer, television or smart wearable electronic product.

[0095] The display device and display panel provided in the embodiments of this application belong to the same inventive concept, can solve the same technical problems, and thus achieve the same technical effects. Repeated content will not be repeated.

[0096] In the description of this specification, references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative descriptions of the above terms do not necessarily refer to the same embodiments or examples.

[0097] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0098] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A driving method for a display panel, characterized in that, The method includes: Obtain the current refresh mode of the display panel, wherein the refresh mode includes non-divided frequency and divided frequency; When the refresh mode is non-divided frequency, the first reset voltage is used to reset the driving transistors of the display panel. When the refresh mode is divided into zones and frequencies at the current moment, the driving transistors of the display panel are reset using a second reset voltage, which is different from the first reset voltage. Specifically, when the refresh mode of the display panel is non-divided frequency and the refresh frequency at the current moment is different from the refresh frequency at the previous moment, the first brightness difference between the current moment and the previous moment is obtained, and the first reset voltage of the display panel is determined based on the first brightness difference; when the refresh frequency at the current moment is greater than the refresh frequency at the previous moment, the first reset voltage is positively correlated with the first brightness difference; when the refresh frequency at the current moment is less than the refresh frequency at the previous moment, the first reset voltage is negatively correlated with the first brightness difference. Alternatively, if the refresh mode at the current moment is segmented frequency and the refresh mode at the previous moment is non-segmented frequency, the second brightness difference between the current moment and the previous moment of the display panel is obtained, and the second reset voltage of the display panel is determined based on the second brightness difference; if the refresh frequency of one of the display zones of the display panel at the current moment is greater than the refresh frequency of the display panel at the previous moment, the second reset voltage is positively correlated with the second brightness difference; if the refresh frequency of one of the display zones of the display panel at the current moment is less than the refresh frequency of the display panel at the previous moment, the second reset voltage is negatively correlated with the second brightness difference. Alternatively, when the refresh mode of the display panel is zoned frequency and the refresh frequency of one of the display zones at the current moment is different from the refresh frequency at the previous moment, the third brightness difference between the current moment and the previous moment of the display zone is obtained, and the third reset voltage of the display zone is determined based on the third brightness difference; when the refresh frequency of the display zone at the current moment is greater than the refresh frequency at the previous moment, the third reset voltage is positively correlated with the third brightness difference; when the refresh frequency of the display zone at the current moment is less than the refresh frequency at the previous moment, the third reset voltage is negatively correlated with the third brightness difference.

2. The method according to claim 1, characterized in that, The display panel includes multiple display zones, and the method further includes: When the refresh mode of the display panel is zoned frequency, the data voltage of the hold frame of each display zone is determined according to the refresh frequency of each display zone, wherein the data voltage of the hold frame of at least two display zones is different.

3. The method according to claim 2, characterized in that, In two display partitions with different refresh rates, the data voltage of the hold frame in the display partition with the lower refresh rate is greater than the data voltage of the hold frame in the display partition with the higher refresh rate.

4. The method according to claim 1, characterized in that, The method further includes: When the refresh mode of the display panel is non-divided frequency, the current refresh frequency of the display panel is obtained, and the data voltage corresponding to the current refresh frequency is output to the display panel during the hold frame.

5. The method according to claim 4, characterized in that, As the refresh rate decreases, the data voltage output to the display panel while maintaining the frame rate increases.

6. A display panel, characterized in that, The display includes a display driving circuit, multiple reset lines, multiple data lines, and multiple pixel circuits arranged in an array. The multiple reset lines are used to transmit a first reset voltage, a second reset voltage, and a third reset voltage. The data lines are used to transmit data voltages. The display driving circuit is connected to the corresponding pixel circuit via the corresponding reset line and to the corresponding pixel circuit via the corresponding data line. The display driving circuit is used to execute the driving method of the display panel as described in any one of claims 1-5.

7. The display panel according to claim 6, characterized in that, The pixel circuit includes: The driver module includes driver transistors; A storage module, wherein a first terminal of the storage module is connected to a first power supply voltage, and a second terminal of the storage module is connected to the control terminal of the drive module; A data writing module, wherein a first terminal of the data writing module is connected to a data voltage, a second terminal of the data writing module is connected to the first terminal of the driving module, and a control terminal of the data writing module is connected to a first scan signal; A threshold compensation module, wherein a first end of the threshold compensation module is connected to a second end of the driving module, the second end of the threshold compensation module is connected to a control end of the driving module, and the control end of the threshold compensation module is connected to a second scan signal; A first light-emitting control module, wherein a first terminal of the first light-emitting control module is connected to a first power supply voltage, a second terminal of the first light-emitting control module is connected to the first terminal of the driving module, and a light-emitting control signal is connected to the control terminal of the first light-emitting control module; The second light-emitting control module has a first end connected to the second end of the driving module, a second end connected to the first end of the light-emitting element, a second power supply voltage connected to the second end of the light-emitting element, and a light-emitting control signal connected to the control end of the second light-emitting module. An initialization module is provided, wherein the first terminal of the initialization module is connected to an initialization voltage, the second terminal of the initialization module is connected to the control terminal of the drive module, and the control terminal of the initialization module is connected to a third scan signal. The first reset module has a first terminal connected to a reset voltage, a second terminal connected to the second terminal of the drive module, and a control terminal connected to a fourth scan signal.

8. A display device, characterized in that, Includes the display panel as described in any one of claims 6-7.

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