Display panel, driving method thereof and display device

Abstract

The invention relates to a display panel, a driving method thereof and a display device. The method comprises the following steps: acquiring a refreshing mode of a display panel at the current moment, resetting a driving transistor of the display panel by adopting a first reset voltage under the condition that the refreshing mode at the current moment is non-partitioned frequency division, and resetting the driving transistor of the display panel by adopting a second reset voltage under the condition that the refreshing mode at the current moment is partitioned frequency division. The second reset voltage is adopted to reset the driving transistor of the display panel, and the second reset voltage is different from the first reset voltage, so that the different reset voltages are adopted to reset the driving transistor of the display panel in different refresh modes of the display panel, namely, non-partitioned frequency division or partitioned frequency division; therefore, flicker caused by threshold voltage offset of the driving transistor when different refresh modes are switched is improved, and the display effect is improved.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display panel and a driving method thereof, and a display device. Background Art

[0002] With the development of display technology, the size of display panels is getting bigger and bigger. At the same time, in order to make full use of the display area of ​​the display panel, partition display is proposed in the related technology, that is, different display partitions in the display area of ​​the same display panel display different operation interfaces at the same time, such as displaying the playing video in one display partition and displaying information in another display partition, or displaying images in one display partition while keeping the other display partition dark. Accordingly, in order to reduce energy consumption, different display partitions use different refresh frequencies. However, in the related technology, when the display panel switches from non-partitioned frequency-frequency display to partitioned frequency-frequency display, the display panel flickers and the display effect is poor. Summary of the invention

[0003] Based on this, it is necessary to provide a display panel and a driving method and a display device thereof which can improve the flicker of the display panel and enhance the display effect.

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

[0005] Acquire a current refresh mode of the display panel, where the refresh mode includes non-divided frequency division and divided frequency division;

[0006] When the current refresh mode is non-division frequency division, a first reset voltage is used to reset the driving transistor of the display panel;

[0007] When the refresh mode at the current moment is the zone-by-zone frequency division, a second reset voltage is used to reset the driving transistor of the display panel, and the second reset voltage 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-division frequency division and the refresh frequency at the current moment is different from the refresh frequency at the previous moment, obtaining a first brightness difference between the display panel at the current moment and the previous moment, and determining the first reset voltage of the display panel according to the first brightness difference;

[0010] 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; 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.

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

[0012] When the refresh mode at the current moment is the zoned frequency division and the refresh mode at the previous moment is the non-zoned frequency division, obtaining a second brightness difference between the display panel at the current moment and the previous moment, and determining the second reset voltage of the display panel according to the second brightness difference;

[0013] Optionally, when the refresh frequency of one of the display partitions 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; when the refresh frequency of one of the display partitions 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.

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

[0015] When the refresh mode of the display panel is zone-by-zone frequency and the refresh frequency of one display zone at a current moment is different from the refresh frequency at a previous moment, obtaining a third brightness difference between the display zone at a current moment and a previous moment, and determining a third reset voltage of the display zone according to the third brightness difference;

[0016] Optionally, when the refresh frequency of the display partition 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 partition 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.

[0017] In one embodiment, the display panel includes a plurality of display partitions, and the method further includes:

[0018] When the refresh mode of the display panel is partition-by-partition frequency, the data voltage of the holding frame of each display partition is determined according to the refresh frequency of each display partition, wherein the data voltages of the holding frames of at least two display partitions are different.

[0019] In one of the embodiments, in the two display partitions with different refresh frequencies, the data voltage of the holding frame of the display partition with a smaller refresh frequency is greater than the data voltage of the holding frame of the display partition with a larger refresh frequency.

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

[0021] When the refresh mode of the display panel is non-division frequency division, the refresh frequency of the display panel at the current moment is obtained, and a data voltage corresponding to the refresh frequency at the current moment is output to the display panel in a holding frame of the display panel;

[0022] Optionally, as the refresh frequency shows a decreasing trend, the data voltage output to the display panel in the maintaining frame shows an increasing trend.

[0023] In the second aspect, an embodiment of the present application further provides a display panel, comprising a display driving circuit, a plurality of reset lines, a plurality of data lines and a plurality of pixel circuits arranged in an array, wherein the plurality of 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 circuits through the corresponding reset lines, and the display driving circuit is connected to the corresponding pixel circuits 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 circuit comprises:

[0025] In a third aspect, a display device is provided, comprising the display panel as described in the second aspect.

[0026] The above-mentioned display panel, its driving method and display device, obtain the refresh mode of the display panel at the current moment, and then use a first reset voltage to reset the driving transistor of the display panel when the refresh mode at the current moment is non-divided frequency division, and use a second reset voltage to reset the driving transistor of the display panel when the refresh mode at the current moment is divided frequency division, and the second reset voltage is different from the first reset voltage. In this way, under different refresh modes of the display panel, that is, non-divided frequency division or divided frequency division, the embodiments of the present application use different reset voltages to reset the driving transistor of the display panel, thereby improving the flicker caused by the threshold voltage offset of the driving transistor when switching between different refresh modes, and improving the display effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 A schematic diagram of non-divided frequency modulation of a display panel according to an embodiment;

[0029] Figure 2 A schematic diagram of the frequency division of a display panel according to an embodiment;

[0030] Figure 3This is a schematic diagram of a process of driving a display panel according to an embodiment;

[0031] Figure 4 The second flowchart of the method for driving a display panel according to an embodiment;

[0032] Figure 5 FIG3 is a third flow chart of a method for driving a display panel according to an embodiment;

[0033] Figure 6 FIG4 is a fourth flow chart of a method for driving a display panel according to an embodiment;

[0034] Figure 7 A schematic diagram of a writing frame and a holding frame of a display panel according to an embodiment;

[0035] Figure 8 FIG5 is a fifth flow chart of a method for driving a display panel according to an embodiment;

[0036] Fig. 9 is a schematic structural diagram of a pixel circuit according to an embodiment;

[0037] Fig.10 FIG6 is a sixth flow chart of a method for driving a display panel according to an embodiment;

[0038] Fig.11 FIG. 4 is a schematic diagram of a display device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0039] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0041] It is understood that the terms "first", "second", etc. used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish a first element from another element. 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 the connected circuits, modules, units, etc. have electrical signals or data transmission between each other.

[0043] It can be understood that “at least one” means one or more, “plurality” means two or more, and “at least a portion of an element” means a part or all of an element.

[0044] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" and the like specify the presence of stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. At the same time, the term "and / or" used in this specification includes any and all combinations of the relevant listed items.

[0045] As mentioned in the background technology, in the related art, when the display panel switches from non-divided frequency modulation to divided frequency modulation, the display panel flickers. The inventors have found that the reason is:

[0046] Typically, a display panel includes a plurality of light-emitting elements arranged in an array and a plurality of pixel circuits arranged in an array. The light-emitting element is, for example, an organic light-emitting diode (OLED). The pixel circuit is connected to the corresponding light-emitting element and is used to drive the light-emitting element. Generally, the pixel circuit is composed of devices such as a thin film transistor (TFT) and a capacitor, wherein the driving thin film transistor (referred to as the driving transistor) is used to generate a driving current, and the light-emitting element emits light in response to the driving current.

[0047] The refresh modes of the display panel include non-divided frequency modulation and divided frequency modulation, wherein the display panel includes a non-display area and a display area, and the non-display area is arranged around the display area; non-divided frequency modulation means that each position of the entire display area adopts the same refresh frequency, refer to Figure 1 , all positions in the entire display area use refresh frequency F1; partition frequency refers to the entire display area is divided into multiple display partitions, different display partitions can use different refresh frequencies, refer to Figure 2 The entire display area is divided into three display partitions, the upper and lower display partitions both use a refresh rate of F2, and the middle display partition uses a refresh rate of F3.

[0048] During the current refresh process, the driving transistor needs to be reset to eliminate the offset of the threshold voltage of the driving transistor after the last refresh, wherein resetting the driving transistor means resetting the source and drain of the driving transistor using a reset voltage. When the display panel switches from non-divided frequency division to divided frequency division, the refresh frequency is switched (that is, the refresh frequency changes), and the reset voltage under non-divided frequency division is no longer applicable to the reset of the driving transistor under divided frequency division. In other words, the reset voltage under non-divided frequency division is not applicable to the reset of the driving transistor under divided frequency division. However, in the related art, the display panel uses the same reset voltage under non-divided frequency division and divided frequency division, resulting in the driving transistor not being well reset when the display panel switches from non-divided frequency division to divided frequency division, and the threshold voltage is greatly offset, so that the display panel flickers, that is, the display panel has strobe switching.

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

[0050] The display panel driving method provided in the embodiment of the present application may be applicable to, for example, an OLED display panel. The display panel driving method provided in the embodiment of the present application may be executed, but not limited to, by a display driver chip (DisplayDriver IC, DDIC) in the display panel.

[0051] In an exemplary embodiment, referring to Figure 3 , a method for driving a display panel is provided, the method comprising the following steps S302~S306.

[0052] S302, obtaining a current refresh mode of the display panel, where the refresh mode includes non-district-based frequency division and district-based frequency division.

[0053] The display panel includes a non-display area and a display area, and the non-display area is arranged around the display area; non-partitioned frequency refers to that each position of the entire display area adopts the same refresh frequency, referring to Figure 1 , all positions in the entire display area use refresh frequency F1; partition frequency refers to the entire display area is divided into multiple display partitions, different display partitions can use different refresh frequencies, refer to Figure 2 The entire display area is divided into three display partitions, the upper and lower display partitions use refresh rate F2, and the middle display partition uses refresh rate F3. The refresh mode of the display panel can remain in non-partitioned frequency division or partitioned frequency division, or can be switched from non-partitioned frequency division to partitioned frequency division or from partitioned frequency division to non-partitioned frequency division.

[0054] S304: When the current refresh mode is non-division-based frequency division, a first reset voltage is used to reset the driving transistor of the display panel.

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

[0056] The first reset voltage is suitable for resetting the driving transistor under non-divided frequency division to achieve a good reset of the driving transistor of each pixel circuit of the display panel under non-divided frequency division; the first reset voltage can be a preset value preset in the DDIC; the first reset voltage can also be obtained in real time according to the refresh frequency at the current moment, for example, the DDIC stores multiple first reset voltages corresponding to multiple different refresh frequencies, so that the DDIC can obtain the corresponding first reset voltage according to the refresh frequency at the current moment. It can be understood that the specific value of the first reset voltage is not only related to the refresh frequency of the above-mentioned 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, the refresh frequency of the display panel at the previous moment, etc.

[0057] S306, when the current refresh mode is the zone-by-zone frequency division, a second reset voltage is used to reset the driving transistor of the display panel, and the second reset voltage is different from the first reset voltage.

[0058] The second reset voltage may be provided by DDIC to each pixel circuit of the display panel but is not limited thereto. It is understandable that when the refresh mode of the display panel is the zone-by-zone frequency division, the second reset voltage is used to reset the source and drain of the driving transistor of each pixel circuit of the display panel.

[0059] The second reset voltage is suitable for resetting the driving transistor under the partition frequency division to achieve a good reset of the driving transistor of each pixel circuit of the display panel under the partition 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 partition at the current moment, for example, a plurality of second reset voltages corresponding to a plurality of different display partition refresh frequency combinations are stored in the DDIC, so that the DDIC can obtain the corresponding second reset voltage according to the display partition refresh frequency combination at the current moment; for example, one display partition refresh frequency combination is F2=1Hz, F3=60Hz, and another display partition refresh frequency combination is F2=60Hz, F3=120Hz, and the second reset voltages corresponding to the two display partition refresh frequency combinations may be different. It can be understood that the specific value of the second reset voltage is not only related to the above-mentioned display partition refresh frequency combination, but may also be related to the number of light-emitting elements of each display partition, the number of light-emitting elements of the display panel, the refresh mode of the display panel at the last moment, the refresh frequency of the display panel at the last moment, etc.

[0060] In the embodiments of the present application, different reset voltages are used to reset the driving transistors of each pixel circuit of the display panel under different refresh modes of the display panel, i.e., non-divided frequency division or divided frequency division. The first reset voltage is suitable for resetting the driving transistor under non-divided frequency division, and the second reset voltage is suitable for resetting the driving transistor under divided frequency division, thereby improving the flicker caused by the threshold voltage offset of the driving transistor when switching between different refresh modes and improving the display effect.

[0061] Based on the above, in the embodiments of the present application, the inventors have found through research that the main reason for frequency switching flicker (i.e. flicker caused by switching the refresh frequency) is that the threshold voltage of the driving transistor before and after the switching is not well reset. Therefore, improving the reset of the driving transistor before and after the switching is conducive to improving the frequency switching flicker. Improving the reset of the driving transistor before and after the switching can be achieved by adjusting the reset voltage. The frequency switching flicker that may be involved in the display panel and the method for improving the frequency switching flicker in the embodiments of the present application are exemplarily described below, but are not intended to limit the present invention:

[0062] In an exemplary embodiment, referring to Figure 4 , the driving method of the display panel also includes the following steps S402~S404.

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

[0064] S404, determining a first reset voltage of the display panel according to the first brightness difference.

[0065] Among them, when the refresh mode of the display panel is maintained in non-partitioned frequency division, and the refresh frequency at the current moment is different from the refresh frequency at the previous moment (for example, F1 at the current moment = 60Hz and F1 at the previous moment = 10Hz), in order to improve the frequency switching flicker that may be caused by the switching of the refresh frequency of the display panel under non-partitioned frequency division, considering that the improvement of the frequency switching flicker is mainly achieved by improving the brightness difference during frequency switching, the present embodiment obtains the first brightness difference between the display panel at the current moment and the previous moment, and determines the first reset voltage of the display panel according to the first brightness difference, and determines the appropriate first reset voltage of the display panel at the current moment according to the first brightness difference, thereby improving the brightness difference during frequency switching, thereby improving the frequency switching flicker that may be caused by the switching of the refresh frequency of the display panel under non-partitioned frequency division.

[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 low frequency to high frequency refresh, the greater the first brightness difference, the greater the first reset voltage, thereby improving the offset of the threshold voltage of the driving transistor when switching from low frequency to high frequency refresh, and improving the switching flicker when switching from low frequency to high frequency refresh.

[0067] Optionally, 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. 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 threshold voltage of the driving transistor when switching from high frequency to low frequency refresh, and improving the switching flicker when switching from high frequency to low frequency refresh.

[0068] In an exemplary embodiment, referring to Figure 5 , the driving method of the display panel also includes the following steps S502~S504.

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

[0070] S504, determining a second reset voltage of the display panel according to the second brightness difference.

[0071] Among them, when the display panel switches from non-partitioned frequency division to partitioned frequency division, in order to improve the frequency switching flicker that may be caused by the switching of the refresh frequency when the display panel switches from non-partitioned frequency division to partitioned frequency division, considering that the improvement of the frequency switching flicker is mainly achieved by improving the brightness difference when the frequency is switched, the present embodiment obtains the second brightness difference between the current moment and the previous moment of the display panel, and determines the second reset voltage of the display panel according to the second brightness difference, and determines the appropriate second reset voltage of the display panel at the current moment according to the second brightness difference, thereby improving the brightness difference when the frequency is switched, thereby improving the frequency switching flicker that may be caused by the switching of the refresh frequency when the display panel switches from non-partitioned frequency division to partitioned frequency division.

[0072] Optionally, when the refresh frequency of one of the display partitions 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. For example, when the display panel switches from F1=60Hz to F2=60Hz, F3=120Hz, the greater the second brightness difference, the greater the second reset voltage, thereby improving the frequency switching flicker in this case.

[0073] Optionally, when the refresh frequency of one of the display partitions 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. For example, when the display panel switches from F1=120Hz to F2=60Hz, F3=120Hz, the greater the second brightness difference, the smaller the second reset voltage, thereby improving the frequency switching flicker in this case.

[0074] In an exemplary embodiment, referring to Figure 6 , the driving method of the display panel also includes the following steps S602~S604.

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

[0076] S604, determining a third reset voltage of the display subarea according to the third brightness difference.

[0077] Among them, when the display panel remains in the partition frequency division, and the refresh frequency of one of the display partitions at the current moment is different from the refresh frequency of the previous moment, that is, when the display panel switches from one display partition refresh frequency combination to another display partition refresh frequency combination, in order to improve the frequency switching flicker that may be caused by the switching of the refresh frequency of the display partition of the display panel, considering that the improvement of the frequency switching flicker is mainly achieved by improving the brightness difference when the frequency is switched, the present embodiment obtains the third brightness difference between the current moment and the previous moment of each display partition, and determines the third reset voltage of each display partition according to each third brightness difference, and determines the appropriate third reset voltage of the display partition at the current moment according to the third brightness difference, thereby improving the brightness difference of each display partition when the frequency is switched, thereby improving the frequency switching flicker that may be caused by the switching of the refresh frequency of each display partition. It can be understood that the third reset voltage of each display partition can be the same or different.

[0078] Optionally, when the refresh frequency of the display partition 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. For example, for any display partition, when switching from low-frequency refresh to high-frequency refresh, the third reset voltage of the display partition is positively correlated with the third brightness difference, thereby improving the frequency switching flicker of the display partition in this case.

[0079] Optionally, when the refresh frequency of the display partition 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. For example, for any display partition, when switching from high-frequency refresh to low-frequency refresh, the third reset voltage of the display partition is positively correlated with the third brightness difference, thereby improving the frequency switching flicker of the display partition in this case.

[0080] Furthermore, in the embodiments of the present application, the inventors have found that in addition to the switching frequency flicker, the display panel also has static flicker; wherein the static flicker means that even if the display panel does not switch the refresh frequency, the display panel still flickers when it is refreshed at a low frequency; the reasons for the static flicker of the display panel are:

[0081] refer to Figure 7 , the display panel refreshes at a low frequency ( Figure 7 When the display panel is refreshed at a high frequency (60 Hz is used as an example), the screen update cycle of the display panel includes writing frames and holding frames; Figure 7In the example of 120Hz as a high frequency in the figure, the screen update cycle of the display panel includes a write frame but no hold frame. In the write frame, the gate of the driving transistor of the pixel circuit will write the data voltage; in the hold frame, the gate of the driving transistor of the pixel circuit will not write the data voltage, but will hold the data voltage written in the write frame. Due to the long screen update cycle during low-frequency refresh, the hold frame time is longer and the number of frames is larger within the screen update cycle, so the gate of the driving transistor will leak in the hold frame, and eventually the data voltage of the gate of the holding frame driving transistor is no longer the same as the data voltage of the gate of the writing frame driving transistor, and there is a brightness difference between the holding frame and the writing frame, which appears as static flicker.

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

[0083] In an exemplary embodiment, referring to Figure 8 , the driving method of the display panel also includes step S802.

[0084] S802, when the refresh mode of the display panel is non-division frequency division, obtaining the current refresh frequency of the display panel, and outputting a data voltage corresponding to the current refresh frequency to the display panel in a hold frame of the display panel.

[0085] in, Fig. 9 A pixel circuit is exemplarily illustrated in the figure, which includes a drive transistor T1 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, wherein the first reset transistor T7 is used to reset the source and drain of the drive transistor T1 according to the reset voltage Vrefp. In the writing frame: the data writing transistor T2 is turned on, and the data voltage VDATA on the data line is sequentially written to the gate of the drive transistor T1 through the data writing transistor T2, the drive transistor T1 and the threshold compensation transistor T3; in the holding frame: the data writing transistor T2 is turned off, and the gate of the drive transistor T1 will not write the data voltage, but will hold the data voltage written in the writing frame.

[0086] Since there is a parasitic capacitance between the data line and the gate of the driving transistor in the layout structure of the pixel circuit, according to this embodiment, when maintaining the frame, the data voltage on the data line is adjusted to an appropriate value, so that when the data voltage on the data line is coupled to the gate of the driving transistor, it can compensate for the leakage of the gate of the driving transistor, thereby improving the brightness difference between the maintained frame and the written frame, and improving static flicker. Considering that the refresh frequency of the display panel is different, corresponding to the different leakage degree of the driving transistor, the lower the refresh frequency, the longer the time left for the driving transistor to leak, and the more leakage, that is, the greater the leakage degree, and vice versa, the smaller the leakage degree, so the data voltage on the data line of the maintained frame can be adjusted according to the refresh frequency of the display panel, for example, the data voltage on the data line of the maintained frame and the refresh frequency of the display panel can be in a one-to-one correspondence.

[0087] Optionally, as the refresh frequency decreases, the data voltage output to the display panel in the hold frame increases. That is, the greater the leakage of the driving transistor, the greater the data voltage output to the display panel in the hold frame, so as to compensate for the leakage of the gate of the driving transistor by utilizing the effect of the parasitic capacitance, thereby improving the brightness difference between the hold frame and the write frame, and improving static flicker.

[0088] In an exemplary embodiment, referring to Fig.10 , the driving method of the display panel also includes step S1002.

[0089] S1002, when the refresh mode of the display panel is zone-by-zone frequency, determining a data voltage of a holding frame of each display partition according to a refresh frequency of each display partition, wherein the data voltages of the holding frames of at least two display partitions are different.

[0090] Among them, when the display panel is in zone frequency division, some display partitions adopt low refresh frequency. For example, in the combination of F2=60Hz and F3=120Hz, the upper and lower display partitions are refreshed at low frequency, and the middle display partition is refreshed at high frequency. At this time, the gates of the driving transistors of the upper and lower display partitions have obvious leakage in the holding frame, and there is an obvious brightness difference between the writing frame and the holding frame of the upper and lower display partitions, which is manifested as static flickering in the upper and lower display partitions. In this regard, the present embodiment can adjust the data voltage on the data line of the upper and lower display partitions to an appropriate value when holding the frame, thereby compensating for the leakage of the driving transistor, improving the brightness difference between the writing frame and the holding frame of the upper and lower display partitions, and thus improving the static flicker of the upper and lower partitions.

[0091] Optionally, in two display partitions with different refresh frequencies, the data voltage of the holding frame of the display partition with a lower refresh frequency is greater than the data voltage of the holding frame of the display partition with a higher refresh frequency. That is, the greater the leakage of the driving transistor, the greater the data voltage output to the display panel in the holding frame, and vice versa, the smaller the data voltage output to the display panel in the holding frame, so as to compensate for the leakage of the gate of the driving transistor by utilizing the effect of parasitic capacitance, thereby improving the brightness difference between the holding frame and the writing frame, and improving static flicker.

[0092] Based on the same inventive concept, an embodiment of the present application also provides a display panel, which includes a display driver circuit (DDIC), 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 driver circuit is connected to the corresponding pixel circuit via the corresponding reset line, and the display driver circuit is connected to the corresponding pixel circuit via the corresponding data line, and the display driver circuit is used to execute the display panel driving method provided in any of the above embodiments. Optionally, the pixel circuit in the display panel can be as follows Fig. 9 shown.

[0093] The display panel and the driving method of the display panel provided in the embodiments of the present application belong to the same inventive concept, can solve the same technical problems, and thus achieve the same technical effects, and repeated contents will not be repeated.

[0094] Based on the same inventive concept, the embodiment of the present application further provides a display device, which may be an OLED display device. Fig.11 The display device includes a display panel as provided in any of the above embodiments. The display device is, for example, a smart wearable electronic product such as a mobile phone, a computer, a television or a watch.

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

[0096] In the description of this specification, the description with reference to the terms "some embodiments", "other embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic description of the above terms does not necessarily refer to the same embodiment or example.

[0097] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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 above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A method for driving a display panel, characterized in that: The method comprises: Acquire a current refresh mode of the display panel, where the refresh mode includes non-divided frequency division and divided frequency division; When the current refresh mode is non-division frequency division, a first reset voltage is used to reset the driving transistor of the display panel; When the refresh mode at the current moment is the zone-by-zone frequency division, a second reset voltage is used to reset the driving transistor of the display panel, and the second reset voltage is different from the first reset voltage.

2. The method according to claim 1, characterized in that The method further comprises: When the refresh mode of the display panel is non-division frequency division and the refresh frequency at the current moment is different from the refresh frequency at the previous moment, obtaining a first brightness difference between the display panel at the current moment and the previous moment, and determining the first reset voltage of the display panel according to the first brightness difference; 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; 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.

3. The method according to claim 1, characterized in that The method further comprises: When the refresh mode at the current moment is the zoned frequency division and the refresh mode at the previous moment is the non-zoned frequency division, obtaining a second brightness difference between the display panel at the current moment and the previous moment, and determining the second reset voltage of the display panel according to the second brightness difference; Optionally, when the refresh frequency of one of the display partitions 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; when the refresh frequency of one of the display partitions 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.

4. The method according to claim 1, characterized in that: The method further comprises: When the refresh mode of the display panel is zone-by-zone frequency and the refresh frequency of one display zone at a current moment is different from the refresh frequency at a previous moment, obtaining a third brightness difference between the display zone at a current moment and a previous moment, and determining a third reset voltage of the display zone according to the third brightness difference; Optionally, when the refresh frequency of the display partition 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 partition 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.

5. The method according to any one of claims 1 to 4, characterized in that: The display panel includes a plurality of display partitions, and the method further includes: When the refresh mode of the display panel is partition-by-partition frequency, the data voltage of the holding frame of each display partition is determined according to the refresh frequency of each display partition, wherein the data voltages of the holding frames of at least two display partitions are different.

6. The method according to claim 5, characterized in that In the two display partitions with different refresh frequencies, the data voltage of the holding frame of the display partition with a smaller refresh frequency is greater than the data voltage of the holding frame of the display partition with a larger refresh frequency.

7. The method according to any one of claims 1 to 4, characterized in that: The method further comprises: When the refresh mode of the display panel is non-division frequency division, the refresh frequency of the display panel at the current moment is obtained, and a data voltage corresponding to the refresh frequency at the current moment is output to the display panel in a holding frame of the display panel; Optionally, as the refresh frequency shows a decreasing trend, the data voltage output to the display panel in the maintaining frame shows an increasing trend.

8. A display panel, characterized in that: It includes 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 circuits through the corresponding reset lines, and the display driving circuit is connected to the corresponding pixel circuits through the corresponding data lines, and the display driving circuit is used to execute the driving method of the display panel as described in any one of claims 1 to 7.

9. The display panel according to claim 8, characterized in that: The pixel circuit comprises: A driving module, including a driving transistor; A storage module, wherein a first end of the storage module is connected to a first power supply voltage, and a second end of the storage module is connected to a control end of the driving module; A data writing module, wherein a first end of the data writing module is connected to a data voltage, a second end of the data writing module is connected to a first end of the driving module, and a control end of the data writing module is connected to a first scanning signal; A threshold compensation module, wherein a first end of the threshold compensation module is connected to a second end of the driving module, a second end of the threshold compensation module is connected to a control end of the driving module, and a control end of the threshold compensation module is connected to a second scanning signal; A first light control module, wherein a first end of the first light control module is connected to a first power supply voltage, a second end of the first light control module is connected to a first end of the driving module, and a control end of the first light control module is connected to a light control signal; a second light-emitting control module, wherein a first end of the second light-emitting control module is connected to a second end of the driving module, a second end of the second light-emitting control module is connected to a first end of the light-emitting element, a second end of the light-emitting element is connected to a second power supply voltage, and a control end of the second light-emitting control module is connected to a light-emitting control signal; An initialization module, wherein a first terminal of the initialization module is connected to an initialization voltage, a second terminal of the initialization module is connected to a control terminal of the driving module, and the control terminal of the initialization module is connected to a third scanning signal; A first reset module, wherein a first end of the first reset module is connected to a reset voltage, a second end of the first reset module is connected to a second end of the driving module, and a control end of the first reset module is connected to a fourth scanning signal.

10. A display device, characterized in that: Comprising a display panel as described in any one of claims 8 to 9.

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