Display driving method, display driving circuit and display device

Abstract

The invention provides a display driving method, a display driving circuit and a display device, and relates to the technical field of display, and the display driving method comprises the following steps: during the display period of a current frame, according to a polarity accumulated value corresponding to a previous frame, the display duration of the previous frame and the polarity of a driving voltage in the previous frame, obtaining a polarity accumulated value corresponding to the previous frame; obtaining a polarity accumulated value corresponding to the current frame; under the condition that the polarity accumulated value corresponding to the current frame meets a compensation condition, determining a compensation frame according to the polarity of the driving voltage in the current frame and a target polarity; wherein the target polarity is the polarity corresponding to the polarity accumulated value of the current frame; the compensation frame is a display frame behind the current frame; and when the compensation frame is displayed, driving a display panel by adopting a driving voltage of which the polarity is opposite to the target polarity. Polarization of the display panel can be avoided, picture flicker is reduced, and display quality is improved.

Description

Technical Field

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

[0002] Liquid crystal display panels are usually driven in a manner of alternating positive polarity frames and negative polarity frames. In a scenario where the refresh rate changes, the duration of the display frame is different, resulting in a difference in the duration of the positive polarity frame and the negative polarity frame.

[0003] Due to the difference in duration between the positive polarity frame and the negative polarity frame, the duration of the positive polarity driving voltage is different from that of the negative polarity driving voltage, resulting in a long-term imbalance in the positive and negative electric fields of the liquid crystal. When a certain polarity driving voltage accumulates for too long, it is easy to cause panel polarization, resulting in screen flickering. Summary of the invention

[0004] The present application provides a display driving method, a display driving circuit and a display device, which can solve the problem that excessive accumulation of a certain polarity easily causes panel polarization and screen flickering.

[0005] In a first aspect, the present application provides a display driving method, the display driving method comprising:

[0006] During the display of the current frame, the polarity cumulative value corresponding to the current frame is obtained according to the polarity cumulative value corresponding to the previous frame, the display duration of the previous frame, and the polarity of the driving voltage in the previous frame;

[0007] When the polarity accumulation value corresponding to the current frame meets the compensation condition, a compensation frame is determined according to the polarity of the driving voltage in the current frame and the target polarity; wherein the target polarity is the polarity corresponding to the polarity accumulation value of the current frame; and the compensation frame is a display frame located after the current frame;

[0008] When displaying the compensation frame, the display panel is driven by a driving voltage having a polarity opposite to the target polarity.

[0009] Optionally, determining the compensation frame according to the polarity of the driving voltage in the current frame and the target polarity includes:

[0010] According to the polarity of the driving voltage in the current frame, a frame following the target frame is determined as the compensation frame; wherein the target frame is the first display frame starting from the current frame that uses a driving voltage with a polarity opposite to the target polarity.

[0011] Optionally, determining a frame subsequent to the target frame as the compensation frame according to the polarity of the driving voltage in the current frame includes:

[0012] In the case where the polarity of the driving voltage of the current frame is different from the target polarity, determining the first frame after the current frame as the compensation frame; wherein the target frame is the current frame;

[0013] In a case where the polarity of the driving voltage of the current frame is the same as the target polarity, a second frame after the current frame is determined as the compensation frame; wherein the target frame is a first frame after the current frame.

[0014] Optionally, the method further comprises:

[0015] When the polarity cumulative value corresponding to the current frame does not meet the compensation condition, when displaying the next frame of the current frame, the display panel is driven by a driving voltage with a polarity opposite to that of the current frame.

[0016] Optionally, obtaining the polarity cumulative value corresponding to the current frame according to the polarity cumulative value corresponding to the previous frame, the display duration of the previous frame, and the polarity of the driving voltage in the previous frame includes:

[0017] Obtaining the polarity cumulative value corresponding to the current frame according to the polarity cumulative value corresponding to the previous frame, the level state of the polarity control signal in the previous frame, and the duration of the level state;

[0018] The polarity control signal is used to control the polarity of the driving voltage of the corresponding display frame; the polarity control signal has a first level state and a second level state, the duration of the first level state is a positive value, and the duration of the second level state is a negative value.

[0019] Optionally, before determining the compensation frame according to the polarity of the driving voltage in the current frame and the target polarity, the method further includes:

[0020] When the target cumulative value is greater than a preset cumulative threshold, determining that the polarity cumulative value corresponding to the current frame meets the compensation condition;

[0021] When the target cumulative value is less than or equal to the cumulative threshold, it is determined that the polarity cumulative value corresponding to the current frame does not meet the compensation condition; wherein the target cumulative value is the absolute value of the polarity cumulative value corresponding to the current frame.

[0022] Optionally, the method further comprises:

[0023] When the compensation frame is displayed, a row-on voltage provided to the display panel is smaller than a row-on voltage provided during the target frame.

[0024] In a second aspect, the present application provides a display driving circuit, the display driving circuit comprising a timing control circuit and a source driving circuit;

[0025] The timing control circuit is electrically connected to the source driving circuit and is configured to obtain a polarity cumulative value corresponding to the current frame according to a polarity cumulative value corresponding to a previous frame, a display duration of the previous frame, and a polarity of a driving voltage in the previous frame during display of the current frame, and determine a compensation frame according to the polarity of the driving voltage in the current frame and a target polarity when the polarity cumulative value corresponding to the current frame meets a compensation condition, and send a first control signal to the source driving circuit when displaying the compensation frame;

[0026] The source driving circuit is configured to provide a driving voltage of corresponding polarity to the display panel in response to the first control signal; wherein the target polarity is the polarity corresponding to the polarity accumulated value of the current frame; the compensation frame is a display frame located after the current frame; the first control signal is a polarity control signal, and the polarity corresponding to the level state of the first control signal is opposite to the target polarity.

[0027] Optionally, the display driving circuit further includes a gate driving circuit;

[0028] The timing control circuit is electrically connected to the gate driving circuit and is configured to control the gate driving circuit so that when the compensation frame is displayed, a row start voltage provided to the display panel is smaller than a row start voltage provided during a target frame.

[0029] Optionally, the display driving circuit further includes a power management circuit and a level conversion circuit;

[0030] The timing control circuit is electrically connected to the power management circuit and is configured to control the output voltage provided by the power management circuit to the level conversion circuit to be reduced to a compensation voltage;

[0031] The level conversion circuit is electrically connected to the gate driving circuit and is configured to provide an input signal to the gate driving circuit according to the compensation voltage when displaying the compensation frame, so that the gate driving circuit provides a row start voltage to the display panel according to the input signal.

[0032] Optionally, the display driving circuit further includes a power management circuit, a level conversion circuit and a switch circuit;

[0033] The timing control circuit is electrically connected to the switch circuit and is configured to send a switch control signal to the switch circuit;

[0034] The switching circuit is also electrically connected to the power management circuit and the level conversion circuit, respectively, and is configured to, in response to the switching control signal, turn on the power management circuit and the level conversion circuit so that the output voltage provided by the power management circuit to the level conversion circuit is reduced to a compensation voltage, and when displaying the compensation frame, the level conversion circuit provides an input signal to the gate drive circuit according to the compensation voltage, and the gate drive circuit provides a row start-up voltage to the display panel according to the input signal.

[0035] In a third aspect, the present application provides a display device, the display device comprising a display panel and a display driving circuit;

[0036] The display driving circuit is the display driving circuit as described in the second aspect,

[0037] Alternatively, the display driving circuit is used to execute the display driving method as described in the first aspect.

[0038] The present application provides a display driving method, display driving circuit and display device, which have at least the following advantages: by obtaining the polarity cumulative value corresponding to the current frame according to the polarity cumulative value corresponding to the previous frame, the display duration of the previous frame and the polarity of the driving voltage in the previous frame during the display of the current frame, the polarity cumulative result of the driving voltage can be detected in real time, thereby improving the timeliness of polarity detection. When the polarity cumulative value corresponding to the current frame meets the compensation condition, the compensation frame is determined in the current frame according to the polarity of the driving voltage in the current frame and the target polarity. When the compensation frame is displayed, the display panel is driven by a driving voltage with a polarity opposite to the target polarity. The compensation frame is a display frame located after the current frame, which can avoid the problem of over-compensation. Since the target polarity is the polarity corresponding to the polarity cumulative value of the current frame, in this way, a frame with a polarity opposite to the target polarity can be compensated through the compensation frame, thereby reducing the polarity residue of the panel, avoiding the polarization of the display panel, reducing the screen flickering, and improving the display quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments of the present application or related technologies will be 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 paying creative labor.

[0040] Figure 1 is a schematic diagram of the steps of a display driving method provided in an embodiment of the present application;

[0041] Figure 2 It is one of the signal timing diagrams of a display driving method provided in an embodiment of the present application;

[0042] Figure 3 is a logic schematic diagram of a display driving method provided in an embodiment of the present application;

[0043] Figure 4 It is a waveform diagram of a display driving signal in the related art;

[0044] Figure 5 This is the second signal timing diagram of a display driving method provided in an embodiment of the present application;

[0045] Figure 6 is a structural schematic diagram of a display driving circuit provided in an embodiment of the present application;

[0046] Figure 7 It is a structural schematic diagram of another display driving circuit provided in an embodiment of the present application. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in some embodiments to clearly and completely describe the technical solutions in some embodiments. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0048] Figure 1 is a schematic diagram of the steps of a display driving method provided by an embodiment of the present application, such as Figure 1 As shown, the display driving method includes:

[0049] Step S1, during the display period of the current frame, according to the polarity cumulative value corresponding to the previous frame, the display duration of the previous frame and the polarity of the driving voltage in the previous frame, obtain the polarity cumulative value corresponding to the current frame;

[0050] Step S2, when the polarity accumulation value corresponding to the current frame meets the compensation condition, a compensation frame is determined according to the polarity of the driving voltage in the current frame and the target polarity; wherein the target polarity is the polarity corresponding to the polarity accumulation value of the current frame; and the compensation frame is a display frame located after the current frame;

[0051] Step S3, when displaying the compensation frame, driving the display panel with a driving voltage having a polarity opposite to the target polarity.

[0052] In some embodiments, the display driving method is used to drive a liquid crystal display (LCD) panel, and can be applied to a scene where the refresh rate changes, such as a display device supporting a variable refresh rate range (VRR). VRR refers to a mode in which the display device supports real-time frequency changes during the display process.

[0053] In some embodiments, the driving voltage includes a positive driving voltage and a negative driving voltage. The display panel can form a positive / negative electric field under the action of the positive / negative driving voltage, so that the liquid crystal molecules are deflected under the action of the electric field. The driving voltage can be a data voltage provided to the LCD panel by a source driving circuit in a display driving circuit.

[0054] The polarity cumulative value represents the polarity cumulative result of the positive / negative driving voltage provided to the display panel by the display driving circuit before the current frame. A positive polarity cumulative value indicates that the positive polarity driving voltage lasted longer before the current frame, and a negative polarity cumulative value indicates that the negative polarity driving voltage lasted longer before the current frame.

[0055] Each display frame may use a positive or negative driving voltage, and a display frame generally maintains a driving voltage of the same polarity. The duration of the driving voltage in a display frame is the display duration of the display frame. For example, the display duration may be the total duration of the entire display frame, or the duration of the display stage in the display frame. The embodiments of the present application do not limit this.

[0056] In some embodiments, the polarity and duration of the driving voltage can be detected in real time for each frame, and the polarity cumulative value can be updated according to the polarity and duration of the driving voltage. During the display of the current frame, the sign corresponding to the display duration of the previous frame is determined according to the polarity of the driving voltage in the previous frame, and the polarity cumulative value corresponding to the previous frame is updated according to the display duration with the sign to obtain the polarity cumulative value corresponding to the current frame.

[0057] Specifically, if the previous frame is a positive driving voltage, the display duration of the previous frame is a positive value, and if the previous frame is a negative driving voltage, the display duration of the previous frame is a negative value. Then, the polarity cumulative value obtained by the previous frame detection is added to the signed display duration detected in the current frame, and the sum is the polarity cumulative value corresponding to the current value.

[0058] Among them, if the polarity cumulative value corresponding to the current frame is a positive value, it means that the positive polarity driving voltage before the current frame lasts longer, and if the polarity cumulative value corresponding to the current frame is a negative value, it means that the negative polarity driving voltage before the current frame lasts longer. If the polarity cumulative value is zero, the duration of the positive / negative polarity driving voltage before the current frame is equal.

[0059] Alternatively, the polarity cumulative value may also be the difference between the polarity duration of the positive polarity driving voltage and the polarity duration of the negative polarity driving voltage from the start time of the first frame to the end time of the previous frame. If the previous frame is a positive polarity driving voltage, the display duration of the previous frame is added to the polarity cumulative value; if the previous frame is a negative polarity driving voltage, the display duration of the previous frame is subtracted from the polarity cumulative value to obtain the polarity cumulative value corresponding to the current frame.

[0060] In an embodiment of the present application, during the display of the current frame, the polarity accumulation result of the driving voltage is detected in real time according to the polarity accumulation value corresponding to the previous frame, the display duration of the previous frame, and the polarity of the driving voltage in the previous frame, and the polarity accumulation value corresponding to the current frame is obtained, thereby improving the timeliness of the polarity detection. When the polarity accumulation value corresponding to the current frame meets the compensation condition, the compensation frame is determined in the current frame according to the polarity of the driving voltage in the current frame and the target polarity. When the compensation frame is displayed, the display panel is driven by a driving voltage with a polarity opposite to the target polarity. Since the compensation frame is a display frame located after the current frame, the problem of over-compensation can be avoided. Since the target polarity is the polarity corresponding to the polarity accumulation value of the current frame, in this way, a frame of opposite polarity compensation can be performed through the compensation frame, reducing the residual polarity of the panel, avoiding the polarization of the display panel, reducing the flicker of the picture, and improving the display quality.

[0061] Optionally, step S1 includes the following sub-steps:

[0062] Sub-step A1, obtaining a polarity cumulative value corresponding to a current frame according to a polarity cumulative value corresponding to a previous frame, a level state of a polarity control signal in the previous frame, and a duration of the level state;

[0063] The polarity control signal is used to control the polarity of the driving voltage of the corresponding display frame; the polarity control signal has a first level state and a second level state, the duration of the first level state is a positive value, and the duration of the second level state is a negative value.

[0064] In some embodiments, a timing control circuit in a display driving circuit sends a polarity control (POL) signal to a source driving circuit within a display frame, so as to control the source driving circuit to provide a positive / negative polarity driving voltage to the display panel within the display frame through the POL signal. The polarity control signal in a first level state is used to control the corresponding display frame to provide a positive polarity driving voltage, and the polarity control signal in a second level state is used to control the corresponding display frame to provide a negative polarity driving voltage.

[0065] In some embodiments, the first level state is different from the second level state, and the first level state and the second level state are two opposite level states, such as a high level state and a low level state. If the first level state is a high level state, the second level is a low level state, and vice versa. For example, if the POL signal is in a high level state, it means that a positive polarity driving voltage needs to be provided, and if the POL signal is in a low level state, it means that a negative polarity driving voltage needs to be provided. This is only an example, and the embodiments of the present application are not limited to this.

[0066] In some embodiments, the duration of the level state corresponding to the polarity control signal can be detected in real time for each frame, and the polarity cumulative value can be updated according to the duration of the level state. During the display of the current frame, the sign corresponding to the duration of the level state is determined according to the level state of the polarity control signal in the previous frame, and the polarity cumulative value corresponding to the previous frame is updated according to the duration with the sign to obtain the polarity cumulative value corresponding to the current frame.

[0067] Specifically, during the display of the current frame, the duration of the level state corresponding to the polarity control signal in the previous frame can be detected. If the polarity control signal in the previous frame maintains the first level state, the duration is a positive value, and if the polarity control signal in the previous frame maintains the second level state, the duration is a negative value. Then, the signed duration is added to the polarity cumulative value corresponding to the previous frame to update the polarity cumulative value, and the sum result is the polarity cumulative value corresponding to the current frame.

[0068] In the embodiment of the present application, since the polarity control signal is used to control the polarity of the driving voltage corresponding to the display frame; the polarity control signal has a first level state and a second level state, the duration of the first level state is a positive value, and the duration of the second level state is a negative value. In this way, in the current frame, the polarity cumulative value can be simply and conveniently updated according to the duration of the polarity control signal level state of the previous frame, and the polarity cumulative value corresponding to the current frame is obtained, thereby improving the practicality of the display driving method.

[0069] In some embodiments, the current frame detects and updates the polarity cumulative value in real time, but the current frame does not perform compensation, but compensates by providing a driving voltage with a polarity opposite to the target polarity in the compensation frame. In particular, after updating the polarity cumulative value in the compensation frame, only polarity compensation can be focused on without conditional judgment, and the next frame of the compensation frame determines whether the updated polarity cumulative value of the next frame meets the compensation condition.

[0070] The target polarity is the polarity corresponding to the polarity cumulative value corresponding to the current frame. If the polarity cumulative value is positive, the target polarity is positive. If the polarity cumulative value is negative, the target polarity is negative. The compensation frame is a display frame, which can avoid the flickering problem caused by excessive compensation at one time or compensation for too long. Through real-time detection and judgment, the compensation timeliness can be improved and the compensation effect can be optimized.

[0071] Optionally, before step S2, the following steps are also included:

[0072] Step S4, when the target cumulative value is greater than the preset cumulative threshold, determining whether the polarity cumulative value corresponding to the current frame meets the compensation condition;

[0073] Step S5, when the target cumulative value is less than or equal to the cumulative threshold, determining that the polarity cumulative value corresponding to the current frame does not meet the compensation condition; wherein the target cumulative value is the absolute value of the polarity cumulative value corresponding to the current frame.

[0074] In some embodiments, the polarity accumulated value is initialized to zero before the start of this display, and starting from the second frame, the polarity accumulated value can be updated according to the display duration of the first frame and the polarity of the driving voltage. In addition, the second frame uses a driving voltage with opposite polarity to the first frame to drive the display panel. Therefore, after the first two frames, there is a problem of panel polarization due to the different durations of the positive polarity driving voltage and the negative polarity driving voltage, which causes a driving voltage of a certain polarity to last too long.

[0075] In some embodiments, it can be determined whether compensation is needed starting from the third frame, and which display frame after the current frame is the compensation frame is determined based on whether the polarity of the driving voltage in the current frame is the same as the polarity corresponding to the polarity accumulation value. In this way, in actual applications, the phenomenon that polarization has occurred in the first two or three frames can be compensated in time to improve screen flicker.

[0076] In some embodiments, a cumulative threshold may be preset, and the cumulative threshold is used to determine whether the polarity cumulative value corresponding to the current frame meets the compensation condition. The absolute value of the polarity cumulative value corresponding to the current frame may be compared with the preset cumulative threshold. If the absolute value of the polarity cumulative value corresponding to the current frame, i.e., the target cumulative value, is greater than the cumulative threshold, then it is determined that the polarity cumulative value corresponding to the current frame meets the compensation condition. Otherwise, the polarity cumulative value corresponding to the current frame does not meet the compensation condition, and the detection and judgment steps are repeated for the next frame.

[0077] Optionally, the step S1 further includes the following steps:

[0078] Step S6, when the polarity accumulated value corresponding to the current frame does not meet the compensation condition, when displaying the next frame of the current frame, a driving voltage with a polarity opposite to that of the current frame is used to drive the display panel.

[0079] In some embodiments, for display frames other than the compensation frame, a frame inversion driving mode is used in this embodiment, specifically, a positive polarity frame and a negative polarity frame are alternately driven. When the polarity cumulative value corresponding to the current frame does not meet the compensation condition, the next frame of the current frame uses a driving voltage with a polarity opposite to that of the current frame to drive the display panel, and the next frame detects and determines in real time whether compensation is required.

[0080] In some embodiments, when the compensation frame focuses only on polarity compensation without conditional judgment, the next frame after the compensation frame directly reverses polarity and repeats the detection and judgment steps. Otherwise, only when the judgment result in the compensation frame is that the polarity accumulation value does not meet the compensation condition, the next frame of the compensation frame reverses polarity, that is, the display panel is driven by a driving voltage with a polarity opposite to that of the compensation frame.

[0081] Optionally, step S2 may include the following sub-steps:

[0082] Sub-step A2, according to the polarity of the driving voltage in the current frame, determining the next frame after the target frame as the compensation frame; wherein the target frame is the first display frame starting from the current frame that uses a driving voltage with a polarity opposite to the target polarity.

[0083] In some embodiments, for display frames other than the compensation frame, a frame inversion drive is adopted with alternating positive polarity and negative polarity. Taking the current frame as an example, if the current frame is not the previously determined compensation frame, the current frame adopts a driving voltage with opposite polarity to the previous frame.

[0084] In some embodiments, after the current frame determines which display frame the compensation frame is, it takes time to complete the instruction transfer action. Therefore, in this embodiment, a display frame after the current frame is used as the compensation frame to ensure that the instruction transfer is successful, and the polarity compensation can be performed on the display panel when the compensation frame is displayed. Among them, the target frame can also be the current frame, which depends on whether the polarity of the driving voltage in the current frame is the same as the target polarity.

[0085] If the polarity of the driving voltage in the current frame is the same as the target polarity, due to the frame inversion driving method, the next frame of the current frame will have a polarity inversion, so the target frame is the first frame after the current frame. If the polarity of the driving voltage in the current frame is different from the target polarity, the target frame is the current frame.

[0086] Optionally, sub-step A2 may include the following steps:

[0087] When the polarity of the driving voltage of the current frame is different from the target polarity, the first frame after the current frame is determined as a compensation frame; wherein the target frame is the current frame;

[0088] In the case that the polarity of the driving voltage of the current frame is the same as the target polarity, the second frame after the current frame is determined as the compensation frame; wherein the target frame is the first frame after the current frame.

[0089] In some embodiments, when the polarity of the driving voltage of the current frame is different from the target polarity, the target frame is the current frame, and therefore the first frame after the current frame is determined as the compensation frame, for example, if the current frame is the Nth frame, the N+1th frame is the compensation frame. When the polarity of the driving voltage of the current frame is the same as the target polarity, the target frame is the first frame after the current frame, and therefore the second frame after the current frame is determined as the compensation frame, for example, if the current frame is the Nth frame, the N+2th frame is the compensation frame. Among them, the target frame uses a driving voltage with a polarity opposite to that of the current frame, and the compensation frame uses a driving voltage with a polarity opposite to that of the target polarity, so that the polarities of the driving voltages in the target frame and the compensation frame are opposite to the target polarity.

[0090] In some embodiments, if the polarity of the driving voltage of the current frame is the same as the polarity corresponding to the polarity accumulation value of the current frame, the second frame after the current frame is determined as the compensation frame. At this time, the polarity of the driving voltage starting from the current frame is: the polarity of the current frame is reversed, the first frame after the current frame is further reversed, and then the compensation frame, i.e., the second frame after the current frame, uses a driving voltage with a polarity opposite to the target polarity to drive the display panel for polarity compensation.

[0091] Among them, since the polarity of the driving voltage of the current frame is the same as the target polarity, the polarity of the first frame after the current frame is reversed, and the polarity of the driving voltage of the first frame after the current frame is also opposite to the polarity corresponding to the polarity cumulative value of the current frame. Therefore, the two display frames after the current frame are opposite to the target polarity.

[0092] In some embodiments, if the polarity of the driving voltage of the current frame is different from the polarity corresponding to the polarity accumulation value of the current frame, the first frame after the current frame is determined as the compensation frame. At this time, the polarity of the first frame after the current frame is not reversed, that is, the polarity of the driving voltage of the current frame and the next frame is the same, so that the display panel is polarity compensated.

[0093] In the embodiment of the present application, the next frame after the target frame is determined as the compensation frame according to the polarity of the driving voltage in the current frame. It can be flexibly determined which display frame after the current frame is the compensation frame according to whether the polarity of the driving voltage of the current frame is the same as the polarity corresponding to the polarity accumulated value of the current frame. This can avoid the problem of insufficient compensation or excessive compensation and make the polarity compensation more accurate and reasonable.

[0094] Figure 2 is one of the signal timing diagrams of a display driving method provided in an embodiment of the present application, Figure 2The figure shows the waveform of the original polarity control (POL) signal and the compensation POL signal of the compensation frame in this embodiment. In the related art, the frame inversion driving method, even if the duration of each frame is different, the polarity of the driving voltage of each frame will be reversed, such as Figure 2 The original POL signal shown switches level every frame. When the original POL signal is in a high level state, the driving voltage is positive, and when the original POL signal is in a low level state, the driving voltage is negative, so that the driving voltage switches back and forth between positive / negative polarities. However, due to the different durations of the positive / negative frames, it is easy to cause polarization problems in the display panel.

[0095] The embodiment of the present application provides a display driving method, in which the polarity cumulative value is updated in the current frame according to the duration of the level state of the polarity control signal of the previous frame, and when the absolute value of the updated polarity cumulative value is greater than the cumulative threshold, that is, the compensation condition is met, the compensation frame is determined in the current frame according to the polarity of the driving voltage of the current frame and the polarity corresponding to the polarity cumulative value of the current frame, and when the compensation frame is displayed, the polarity control signal is switched to the target level state, thereby controlling the polarity of the driving voltage of the compensation frame to be opposite to the polarity corresponding to the polarity cumulative value of the current frame, so as to perform polarity compensation on the display panel. The target level state is a level state corresponding to the driving voltage of the opposite polarity to the target polarity.

[0096] like Figure 2 As shown, the Nth frame is judged to exceed the threshold, that is, the absolute value of the polarity accumulation value of the current frame is greater than the accumulation threshold. At this time, the polarity accumulation value is negative (-), and the POL signal of the Nth frame is in a low level state. Then the polarity of the driving voltage of the Nth frame is the same as the target polarity, and the normal polarity of the N+1 frame is reversed, as shown in FIG. Figure 2 As shown, the POL signal is in a high level state. The N+2 frame is a compensation frame, and compensation is performed in the N+2 frame, the POL signal is still in a high level state, and the polarity of the driving voltage in the N+2 frame is the same as the polarity of the driving voltage in the N+1 frame.

[0097] like Figure 2 As shown, after the N+2 frame ends, the N+3 frame has a normal polarity reversal, and the POL signal becomes a low level state. The N+3 frame determines that the accumulated value of the polarity is negative and still exceeds the threshold. Since the polarity of the driving voltage in the N+3 frame is still the same as the target polarity, the next frame, that is, the N+4 frame, has a normal polarity reversal of the driving voltage. The N+5 frame is a compensation frame. After the compensation of the N+5 frame is completed, the POL signal becomes a low level state again.

[0098] like Figure 2As shown, the Mth frame is judged to exceed the threshold value, and the polarity cumulative value is positive (+) at this time. The POL signal of the Mth frame is in a low-level state, and the polarity of the driving voltage of the Mth frame is opposite to the target polarity. The M+1 frame is a compensation frame. Compensation is performed in the M+1 frame, and the POL signal is still in a low-level state. The polarity of the driving voltage of the M+1 frame is the same as the polarity of the driving voltage of the M frame. Then the normal polarity of the M+2 frame is reversed, and real-time detection and judgment of whether compensation is required continue.

[0099] Figure 3 This is a logic diagram of a display driving method provided by an embodiment of the present application. The polarity cumulative value is updated according to the display duration of each frame and the polarity corresponding to the driving voltage. After the first two frames, there may be a problem that the driving voltage of a certain polarity lasts too long. In order to avoid polarization of the display panel, the display panel needs to be polarity compensated. Starting from the third frame (N≥3), real-time detection and judgment on whether compensation is required are performed. Specifically, whether the compensation conditions are met is judged based on whether the absolute value of the polarity cumulative value obtained in the current frame exceeds the cumulative threshold. In this way, the phenomenon that the polarization has already occurred in the first two frames or the first three frames in actual applications can be compensated in time to improve screen flicker.

[0100] like Figure 3 As shown, when the target cumulative value is less than or equal to the cumulative threshold, it is determined that the compensation condition is not met, the polarity of the driving voltage of the next frame is reversed, and the detection and judgment steps are repeated. When the target cumulative value is greater than the cumulative threshold, it is determined that the compensation condition is met, and it is necessary to further determine whether the polarity of the driving voltage of the Nth frame is the same as the target polarity, and the target polarity is the polarity corresponding to the polarity cumulative value of the current frame. If the polarity of the driving voltage of the Nth frame is the same as the target polarity, the N+2th frame is a compensation frame, the N+1th frame is normally reversed in polarity, the N+2th frame is not reversed in polarity relative to the N+1th frame, and the polarity of the driving voltage of the N+2th frame is the same as that of the N+1th frame and opposite to the target polarity. Otherwise, the N+1th frame is a compensation frame, the N+1th frame is not reversed in polarity, the polarity of the driving voltage of the N+1th frame is the same as that of the Nth frame and opposite to the target polarity, and then the N+2th frame is reversed in polarity again and the detection and judgment steps are repeated.

[0101] In some embodiments, if the current frame is the Nth frame, in the frame inversion driving mode, such as Figure 3 As shown, the polarity of the driving voltage in the N+1 frame and the N+2 frame has been determined in advance in the N frame, so the N+1 frame does not perform polarity judgment, and when the N+2 frame is in progress, it is judged whether the updated polarity cumulative value of the N+2 frame meets the compensation condition, that is, the polarity judgment process is omitted in the N+1 frame, and the polarity judgment is resumed in the N+2 frame. In this way, the logic judgment process can be simplified, with the advantages of program saving and reduced system resource occupation.

[0102] Figure 4is a waveform diagram of a display driving signal in the related art. Figure 4 The waveforms of the POL signal and the GOACLK signal are shown. Due to the change in refresh frequency, the duration of each display frame is different. As shown in the figure, after the four frames ①②③④ are completed, the accumulated polarity will shift, resulting in polarization of the display panel.

[0103] Optionally, after step S3, the following steps are further included:

[0104] Step S7: when displaying the compensation frame, the row start voltage provided to the display panel is smaller than the row start voltage provided during the target frame.

[0105] In some embodiments, if the row turn-on voltage provided to the display panel during the compensation frame is consistent with that of other display frames, since the polarity of the compensation frame is not reversed, that is, the compensation frame has the same driving voltage polarity as the previous frame, the pixel charging of the display panel is significantly better, which may cause the display panel to be too bright and cause flickering problems.

[0106] In the embodiment of the present application, when displaying the compensation frame, the display panel is driven by a driving voltage with a polarity opposite to the target polarity, and the voltage value of the row turn-on voltage provided to the display panel is reduced, that is, the row turn-on voltage provided to the display panel during the compensation frame is less than the row turn-on voltage provided to the display panel during the target frame, wherein the target frame is the previous frame of the compensation frame. In this way, the aperture ratio of the thin film transistor (TFT) inside the display panel can be reduced to achieve the effect that the charging of the compensation frame is weaker than that of the previous frame, thereby avoiding the flicker problem.

[0107] Figure 5 This is the second signal timing diagram of a display driving method provided in an embodiment of the present application. Figure 5 Figure 1 shows the compensated POL signal, the original GOA CLK signal, the compensated GOA CLK signal, and the panel brightness before and after the GOA CLK signal is compensated. Figure 2 The POL signal waveform of the compensation frame is the same as shown. Figure 5 As shown, before the GOACLK signal is compensated, the compensation frame has the problem of the panel being too bright. In this embodiment, when compensating the frame, the voltage value of the GOA CLK signal is reduced, thereby reducing the charging effect in the compensation frame, thereby avoiding the problem of the display panel being too bright in the compensation frame.

[0108] The embodiment of the present application further provides a display driving circuit, the display driving circuit comprising a timing control circuit and a source driving circuit;

[0109] The timing control circuit is electrically connected to the source driving circuit and is configured to obtain a polarity cumulative value corresponding to the current frame according to a polarity cumulative value corresponding to a previous frame, a display duration of the previous frame, and a polarity of a driving voltage in the previous frame during display of the current frame, and determine a compensation frame according to the polarity of the driving voltage in the current frame and a target polarity when the polarity cumulative value corresponding to the current frame meets the compensation condition, and send a first control signal to the source driving circuit when displaying the compensation frame;

[0110] The source driving circuit is configured to provide a driving voltage of corresponding polarity to the display panel in response to a first control signal; wherein the target polarity is the polarity corresponding to the polarity accumulated value of the current frame; the compensation frame is a display frame located after the current frame; the first control signal is a polarity control signal, and the polarity corresponding to the level state of the first control signal is opposite to the target polarity.

[0111] In some embodiments, the timing control circuit may be a timing controller (TCON) or a system on chip (SOC), and the source driver circuit may be a source driver chip (Source IC). TCON or SOC may receive display signals such as USB, HDMI, DTV, etc., and output timing signals that can be used to drive the display panel, such as outputting P2P signals and clock pulse signals provided to the Level Shift circuit, and the clock pulse signal may be recorded as CK, CPV, or CLKPulse.

[0112] The timing control circuit is electrically connected to the source driving circuit, and the timing control circuit can send a polarity control signal to the source driving circuit, so that the source driving circuit provides a driving circuit of the polarity indicated by the polarity control signal to the display panel. Wherein, the display panel is an LCD panel, and the driving voltage provided by the source driving circuit includes a positive polarity data voltage and a negative polarity data voltage to drive the liquid crystal molecules in the LCD panel to deflect and display the picture.

[0113] In some embodiments, the source driving circuit provides a driving voltage of corresponding polarity to the display panel according to the level state of the polarity control signal. Specifically, if the polarity control signal is in a first level state, the source driving circuit responds to the first control signal and provides a driving voltage of positive polarity to the display panel. If the polarity control signal is in a second level state, the source driving circuit responds to the first control signal and provides a driving voltage of negative polarity to the display panel.

[0114] In some embodiments, when displaying the compensation frame, the timing control circuit sends a first control signal to the source driving circuit, and the polarity corresponding to the first control signal is opposite to the polarity corresponding to the polarity accumulation value of the current frame, that is, the target polarity. If the target polarity is positive, the first control signal is in the second level state, and if the target polarity is negative, the first control signal is in the first level state.

[0115] In some embodiments, the timing control circuit needs time to complete the instruction transfer action and send out the polarity control signal. Therefore, in this embodiment, a display frame after the current frame is used as a compensation frame, and polarity compensation is performed on the display panel in the compensation frame. For example, the absolute value of the polarity cumulative value determined in the Nth frame is greater than the cumulative threshold, which means that the compensation condition is met. The TCON or SOC performs instruction transfer in the Nth frame. Most chips cannot prepare for instruction transfer in such a short time, and the blank area (Blank) time of each frame is short when the refresh rate is high, so compensation is not performed in the Nth frame.

[0116] Optionally, the timing control circuit is configured as:

[0117] According to the polarity of the driving voltage in the current frame, the next frame after the target frame is determined as the compensation frame; wherein the target frame is the first display frame starting from the current frame that uses the driving voltage with a polarity opposite to the target polarity.

[0118] Optionally, the timing control circuit is configured as:

[0119] When the polarity of the driving voltage of the current frame is different from the target polarity, the first frame after the current frame is determined as a compensation frame; wherein the target frame is the current frame;

[0120] In the case that the polarity of the driving voltage of the current frame is the same as the target polarity, the second frame after the current frame is determined as the compensation frame; wherein the target frame is the first frame after the current frame.

[0121] Optionally, the timing control circuit is configured as:

[0122] When the polarity accumulated value corresponding to the current frame does not meet the compensation condition, a second control signal is sent to the source driving circuit when displaying the next frame of the current frame;

[0123] The source driving circuit is configured to provide a driving voltage of corresponding polarity to the display panel in response to a second control signal; wherein the second control signal is a polarity control signal, and a level state of the second control signal is opposite to a level state of the polarity control signal of a current frame.

[0124] In some embodiments, when the polarity cumulative value corresponding to the current frame does not meet the compensation condition, the polarity of the first frame after the current frame is reversed, that is, the next frame of the current frame uses a driving voltage with a polarity opposite to that of the current frame to drive the display panel. The timing control circuit sends a second control signal to the source driving circuit, so that the source driving circuit responds to the second control signal and provides the display panel with a driving voltage of a polarity corresponding to the level state of the second control signal.

[0125] If the polarity control signal of the current frame is in the first level state, the polarity control signal of the next frame, i.e., the second control signal, is in the second level state, and the first level state and the second level state are opposite level states. That is, the level state of the second control signal is opposite to the level state of the polarity control signal of the current frame, so that the polarity of the first frame after the current frame is reversed, and then the second frame after the current frame is a compensation frame.

[0126] Optionally, the timing control circuit is configured as:

[0127] Obtaining a polarity cumulative value corresponding to a current frame according to a polarity cumulative value corresponding to a previous frame, a level state of a polarity control signal in the previous frame, and a duration of the level state;

[0128] The polarity control signal is used to control the polarity of the driving voltage of the corresponding display frame; the polarity control signal has a first level state and a second level state, the duration of the first level state is a positive value, and the duration of the second level state is a negative value.

[0129] In some embodiments, the polarity accumulated value can be stored in a register in the timing control circuit, and the polarity accumulated value in the register is initialized to zero before the current display starts. The current frame directly updates the polarity accumulated value in the register according to the level state and duration of the polarity control signal sent to the source driving circuit in the previous frame. The polarity control signal has a first level state and a second level state, the duration of the first level state is a positive value, and the duration of the second level state is a negative value.

[0130] Optionally, the timing control circuit is configured as:

[0131] When the target cumulative value is greater than a preset cumulative threshold, determining that the polarity cumulative value corresponding to the current frame meets the compensation condition;

[0132] When the target cumulative value is less than or equal to the cumulative threshold, it is determined that the polarity cumulative value corresponding to the current frame does not meet the compensation condition; wherein the target cumulative value is the absolute value of the polarity cumulative value corresponding to the current frame.

[0133] In the embodiment of the present application, the implementation of the circuit embodiment can refer to the relevant description in the aforementioned display driving method embodiment, which will not be repeated here.

[0134] Optionally, the display driving circuit further includes a gate driving circuit;

[0135] The timing control circuit is electrically connected to the gate driving circuit and is configured to control the gate driving circuit so that when displaying the compensation frame, the row start voltage provided to the display panel is smaller than the row start voltage provided during the target frame.

[0136] In some embodiments, the gate driving circuit may be a gate driving chip (Gate IC) or a gate driving integrated circuit on an array substrate (Gate On Array, GOA). The timing control circuit controls the gate driving circuit to reduce the voltage value of the row turn-on voltage provided to the display panel in the compensation frame to avoid the problem of the display panel being too bright.

[0137] In some embodiments, the output voltage of the gate drive circuit is provided by a power supply circuit. For example, the GOA circuit outputs a row-on voltage according to a clock (CLK) signal provided by a level shift circuit (Level Shift). The CLK signal received by the GOA circuit is recorded as GOA CLK, and the high-level voltage (VGH) of the GOA CLK signal is provided to the level shift circuit by a power supply (Power) management circuit. The level shift circuit can convert the input voltage into a CLK pulse voltage for each row of pixel switches of the display panel. In this embodiment, the row-on voltage in the compensation frame is reduced from the VGH voltage to the VGH-L voltage.

[0138] Optionally, the display driving circuit further includes a power management circuit and a level conversion circuit;

[0139] The timing control circuit is electrically connected to the power management circuit and is configured to control the output voltage provided by the power management circuit to the level conversion circuit to be reduced to a compensation voltage;

[0140] The level conversion circuit is electrically connected to the gate driving circuit and is configured to provide an input signal to the gate driving circuit according to the compensation voltage when displaying the compensation frame, so that the gate driving circuit provides a row start voltage to the display panel according to the input signal.

[0141] In some embodiments, the timing control circuit controls the power management circuit to switch between the non-compensated voltage and the compensated voltage by sending a control instruction to the power management circuit, wherein the voltage value of the compensated voltage is less than the voltage value of the non-compensated voltage. For example, the TCON or SOC is connected to the power management circuit via an Inter-Integrated Circuit (IIC) bus, and the TCON or SOC can control the power management circuit to switch the output between the VGH voltage and the VGH-L voltage by sending an IIC instruction to the power management circuit. Among them, the VGH-L voltage is the compensated voltage, the VGH voltage is the non-compensated voltage, and the VGH-L voltage is less than the VGH voltage.

[0142] In some embodiments, the gate drive circuit is a GOA circuit, and the GOA circuit is electrically connected to the Level Shift circuit. The level shift circuit provides a CLK signal to the GOA circuit according to the voltage output by the power management circuit as an input signal of the GOA circuit. If the output voltage provided by the power management circuit is a non-compensated voltage, the level shift circuit provides a CLK signal obtained according to the non-compensated voltage to the GOA circuit, for example, the high level of the CLK signal is VGH. If the output voltage provided by the power management circuit is reduced to a compensated voltage, the level shift circuit provides a CLK signal obtained according to the compensated voltage to the GOA circuit, for example, the high level of the CLK signal is VGH-L.

[0143] In some embodiments, since the timing control circuit determines whether compensation is required and which frame is the compensation frame in the current frame, the timing control circuit can send a control instruction to the power management circuit before the compensation frame, for example, send a control instruction to the power management circuit in the current frame, so that the power management circuit provides a compensation voltage to the level conversion circuit in the compensation frame. Then, the timing control circuit can send a control instruction to the power management circuit in the compensation frame, so that the power management circuit switches back to the non-compensated voltage output in the next frame of the compensation frame.

[0144] In some embodiments, the timing control circuit controls the power management circuit to provide a compensation voltage to the level conversion circuit. When displaying a compensation frame, the level conversion circuit sends an input signal to the gate drive circuit according to the compensation voltage. The input signal is a CLK signal, so that the gate drive circuit provides a row start-up voltage to the display panel according to the input CLK signal.

[0145] Figure 6 is a schematic diagram of a display driving circuit provided in an embodiment of the present application. Figure 6 As shown, TCON or SOC controls the switching of VGH voltage and VGH-L voltage by sending IIC instructions to the power management circuit, and the Level Shift circuit outputs the GOA CLK signal according to the VGH voltage and VGH-L voltage. In the previous frame of the compensation frame, TCON or SOC sends an IIC instruction to the power management circuit, so that the power management circuit switches to output the VGH-L voltage during the compensation frame, and the high level of the CLK signal output by the Level Shift circuit in the compensation frame is the compensation voltage VGH-L. In the compensation frame, TCON or SOC sends an IIC instruction to the power management circuit again, so that the power management circuit switches to output the VGH voltage in the next frame of the compensation frame, and the high level of the CLK signal output by the Level Shift circuit after the compensation frame is restored to the non-compensated voltage VGH.

[0146] Optionally, the display driving circuit further includes a power management circuit, a level conversion circuit and a switch circuit;

[0147] The timing control circuit is electrically connected to the switch circuit and is configured to send a switch control signal to the switch circuit;

[0148] The switching circuit is also electrically connected to the power management circuit and the level conversion circuit, respectively, and is configured to, in response to a switching control signal, turn on the power management circuit and the level conversion circuit so that the output voltage provided by the power management circuit to the level conversion circuit is reduced to a compensation voltage, and when the level conversion circuit displays a compensation frame, the gate driving circuit provides an input signal to the gate driving circuit according to the compensation voltage, and the gate driving circuit provides a row start-up voltage to the display panel according to the input signal.

[0149] In some embodiments, a switch circuit may be provided between the power management circuit and the level conversion circuit, and the power management circuit has two output terminals, which are respectively used to output a non-compensated voltage and a compensated voltage. The input terminal of the switch circuit is electrically connected to the two output terminals of the power management circuit, the output terminal of the switch circuit is electrically connected to the input terminal of the level conversion circuit, and the control terminal of the switch circuit is electrically connected to the timing control circuit. The switch circuit may switch the voltage path between the power management circuit and the level conversion circuit under the control of the timing control circuit, so that the power management circuit switches to output a non-compensated voltage or a compensated voltage.

[0150] In some embodiments, the timing control circuit may send a switch control signal to the switch circuit before the compensation frame, so that the switch circuit switches on the compensation voltage output terminal of the power management circuit and the level conversion circuit in response to the switch control signal. In this way, the level conversion circuit may provide an input signal to the gate drive circuit according to the compensation voltage provided by the power management circuit when displaying the compensation frame, the input signal being a CLK signal, and then the gate drive circuit provides a row-on voltage having a voltage value of the compensation value to the display panel according to the input CLK signal.

[0151] Figure 7 is a schematic diagram of the structure of another display driving circuit provided in an embodiment of the present application, such as Figure 7 As shown, a switch circuit is provided between the power management circuit and the Level Shift circuit, the input end of the Switch circuit is respectively connected to the VGH output end and the VGH-L output end of the power management circuit, and the output end of the Switch circuit is connected to the Level Shift circuit as the input of the high level of the CLK signal. The TCON or SOC is electrically connected to the control end of the Switch circuit through the IO port, and the Switch circuit can be controlled by the high / low level to conduct the VGH voltage path or the VGH-L voltage path.

[0152] like Figure 7As shown, in the previous frame of the compensation frame, TCON or SOC sends a high level to the Switch circuit through the IO port, and the Switch circuit controls the VGH-L voltage path to be turned on. The Level Shift circuit inputs the VGH-L voltage, and the high level of the CLK signal generated by the LevelShift circuit during the compensation frame is the VGH-L voltage. TCON or SOC sends a low level to the Switch circuit through the IO port within the compensation frame, and the Level Shift circuit inputs the VGH voltage, and the high level of the CLK signal generated in the next frame of the compensation frame is restored to the VGH voltage. Among them, TCON or SOC can perform instruction mobilization actions within the Blank time at the end of the frame to improve control efficiency.

[0153] A display driving circuit provided by an embodiment of the present application obtains a polarity cumulative value corresponding to the current frame according to the polarity cumulative value corresponding to the previous frame, the display duration of the previous frame, and the polarity of the driving voltage in the previous frame through a timing control circuit during the display of the current frame, and can detect the polarity cumulative result of the driving voltage in real time, thereby improving the timeliness of polarity detection. The timing control circuit determines whether the polarity cumulative value corresponding to the current frame meets the compensation condition. When the polarity cumulative value corresponding to the current frame meets the compensation condition, the compensation frame is determined according to the polarity of the driving voltage in the current frame and the target polarity. When the compensation frame is displayed, a first control signal is sent to the source driving circuit, and the source driving circuit responds to the first control signal to provide a driving voltage of the corresponding polarity to the display panel. Since the compensation frame is a display frame located after the current frame, the problem of over-compensation can be avoided. Since the target polarity is the polarity corresponding to the polarity cumulative value of the current frame, a frame of compensation with a polarity opposite to the target polarity can be performed through the compensation frame, thereby reducing the polarity residue of the panel, avoiding the polarization of the display panel, reducing the screen flickering, and improving the display quality.

[0154] The embodiment of the present application further provides a display device, the display device comprising a display panel and a display driving circuit;

[0155] The display driving circuit is the display driving circuit as described in the above embodiment, or the display driving circuit is used to execute the display driving method as described in the above embodiment.

[0156] A display device provided in an embodiment of the present application can achieve the same or similar technical effects as the display driving method in the aforementioned embodiment, and will not be described again here to avoid repetition.

[0157] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0158] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0159] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the present application.

[0160] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements.

[0161] The display driving method, display driving circuit and display device provided by the present application are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A display driving method, characterized in that: The display driving method comprises: During the display of the current frame, the polarity cumulative value corresponding to the current frame is obtained according to the polarity cumulative value corresponding to the previous frame, the display duration of the previous frame, and the polarity of the driving voltage in the previous frame; When the polarity accumulation value corresponding to the current frame meets the compensation condition, a compensation frame is determined according to the polarity of the driving voltage in the current frame and the target polarity; wherein the target polarity is the polarity corresponding to the polarity accumulation value of the current frame; and the compensation frame is a display frame located after the current frame; When displaying the compensation frame, the display panel is driven by a driving voltage having a polarity opposite to the target polarity.

2. The display driving method according to claim 1, characterized in that: The step of determining the compensation frame according to the polarity of the driving voltage in the current frame and the target polarity includes: According to the polarity of the driving voltage in the current frame, a frame following the target frame is determined as the compensation frame; wherein the target frame is the first display frame starting from the current frame that uses a driving voltage with a polarity opposite to the target polarity.

3. The display driving method according to claim 2, characterized in that: The step of determining a subsequent frame of the target frame as the compensation frame according to the polarity of the driving voltage in the current frame includes: In the case where the polarity of the driving voltage of the current frame is different from the target polarity, determining the first frame after the current frame as the compensation frame; wherein the target frame is the current frame; In a case where the polarity of the driving voltage of the current frame is the same as the target polarity, a second frame after the current frame is determined as the compensation frame; wherein the target frame is a first frame after the current frame.

4. The display driving method according to claim 1, characterized in that: The method further comprises: When the polarity cumulative value corresponding to the current frame does not meet the compensation condition, when displaying the next frame of the current frame, the display panel is driven by a driving voltage with a polarity opposite to that of the current frame.

5. The display driving method according to claim 1, characterized in that: The step of obtaining the polarity cumulative value corresponding to the current frame according to the polarity cumulative value corresponding to the previous frame, the display duration of the previous frame, and the polarity of the driving voltage in the previous frame includes: Obtaining the polarity cumulative value corresponding to the current frame according to the polarity cumulative value corresponding to the previous frame, the level state of the polarity control signal in the previous frame, and the duration of the level state; The polarity control signal is used to control the polarity of the driving voltage of the corresponding display frame; the polarity control signal has a first level state and a second level state, the duration of the first level state is a positive value, and the duration of the second level state is a negative value.

6. The display driving method according to claim 1, characterized in that: Before determining the compensation frame according to the polarity of the driving voltage in the current frame and the target polarity, the method further includes: When the target cumulative value is greater than a preset cumulative threshold, determining that the polarity cumulative value corresponding to the current frame meets the compensation condition; When the target cumulative value is less than or equal to the cumulative threshold, it is determined that the polarity cumulative value corresponding to the current frame does not meet the compensation condition; wherein the target cumulative value is the absolute value of the polarity cumulative value corresponding to the current frame.

7. The display driving method according to any one of claims 1 to 6, characterized in that: The method further comprises: When the compensation frame is displayed, a row-on voltage provided to the display panel is smaller than a row-on voltage provided during the target frame.

8. A display driving circuit, characterized in that: The display driving circuit includes a timing control circuit and a source driving circuit; The timing control circuit is electrically connected to the source driving circuit and is configured to obtain a polarity cumulative value corresponding to the current frame according to a polarity cumulative value corresponding to a previous frame, a display duration of the previous frame, and a polarity of a driving voltage in the previous frame during display of the current frame, and determine a compensation frame according to the polarity of the driving voltage in the current frame and a target polarity when the polarity cumulative value corresponding to the current frame meets a compensation condition, and send a first control signal to the source driving circuit when displaying the compensation frame; The source driving circuit is configured to provide a driving voltage of corresponding polarity to the display panel in response to the first control signal; wherein the target polarity is the polarity corresponding to the polarity accumulated value of the current frame; the compensation frame is a display frame located after the current frame; the first control signal is a polarity control signal, and the polarity corresponding to the level state of the first control signal is opposite to the target polarity.

9. The display driving circuit according to claim 8, characterized in that: The display driving circuit also includes a gate driving circuit; The timing control circuit is electrically connected to the gate driving circuit and is configured to control the gate driving circuit so that when the compensation frame is displayed, a row start voltage provided to the display panel is smaller than a row start voltage provided during a target frame.

10. The display driving circuit according to claim 9, characterized in that: The display driving circuit also includes a power management circuit and a level conversion circuit; The timing control circuit is electrically connected to the power management circuit and is configured to control the output voltage provided by the power management circuit to the level conversion circuit to be reduced to a compensation voltage; The level conversion circuit is electrically connected to the gate driving circuit and is configured to provide an input signal to the gate driving circuit according to the compensation voltage when displaying the compensation frame, so that the gate driving circuit provides a row start voltage to the display panel according to the input signal.

11. The display driving circuit according to claim 9, characterized in that: The display driving circuit also includes a power management circuit, a level conversion circuit and a switch circuit; The timing control circuit is electrically connected to the switch circuit and is configured to send a switch control signal to the switch circuit; The switching circuit is also electrically connected to the power management circuit and the level conversion circuit, respectively, and is configured to, in response to the switching control signal, turn on the power management circuit and the level conversion circuit so that the output voltage provided by the power management circuit to the level conversion circuit is reduced to a compensation voltage, and when displaying the compensation frame, the level conversion circuit provides an input signal to the gate drive circuit according to the compensation voltage, and the gate drive circuit provides a row start-up voltage to the display panel according to the input signal.

12. A display device, characterized in that: The display device comprises a display panel and a display driving circuit; The display driving circuit is a display driving circuit as claimed in any one of claims 8 to 11, Alternatively, the display driving circuit is used to execute the display driving method according to any one of claims 1 to 7.

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