Display panel driving method, device and computer readable storage medium

Abstract

The embodiment of the present application provides a driving method, device and computer-readable storage medium of a display panel, wherein the display panel includes multiple brightness levels, and one frame of the display panel includes an effective display phase and a blanking phase, and the driving method includes: when detecting the switching of the brightness level, determining the first target voltage value of the power supply voltage signal corresponding to the brightness level to be switched; in the blanking phase before the effective display phase of the next frame, adjusting the voltage value of the power supply voltage signal to the first target voltage value. The embodiment of the present application can improve the screen flickering phenomenon when the display brightness is adjusted, and improve the display effect of the display panel.

Description

Technical Field

[0001] The present application belongs to the field of display technology, and in particular, relates to a display panel driving method, device and computer-readable storage medium. Background Art

[0002] With the development of display technology, people have higher and higher requirements for the performance of display panels. The inventor of this application has found that when the existing display panel adjusts the display brightness, there is a sudden change in display brightness, that is, the screen flickering phenomenon, which not only affects the display effect, but also reduces the user experience. Summary of the invention

[0003] The embodiments of the present application provide a display panel driving method, device, and computer-readable storage medium, which can solve the problem of sudden change in display brightness when adjusting the display brightness.

[0004] In a first aspect, an embodiment of the present application provides a method for driving a display panel, wherein the display panel includes multiple brightness levels, and one frame of the display panel includes an effective display phase and a blanking phase. The driving method includes: when detecting the switching of the brightness level, determining a first target voltage value of a power supply voltage signal corresponding to the brightness level to be switched; and in the blanking phase before the effective display phase of the next frame, adjusting the voltage value of the power supply voltage signal to the first target voltage value.

[0005] According to the implementation of the first aspect of the present application, the driving method also includes: when the switching brightness level is detected, determining the second target voltage value of the data signal corresponding to the brightness level to be switched; in the blanking phase before the effective display phase of the next frame, adjusting the voltage value of the data signal to the second target voltage value.

[0006] In this way, when the switching brightness level is detected, the voltage value of the data signal is adjusted to the second target voltage value in the blanking stage before the effective display stage of the next frame. Adjusting the voltage value of the data signal in the blanking stage can make the peak of the data signal when switching the voltage occur in the blanking stage. Since the light-emitting element in the display panel does not emit light in the blanking stage, the peak of the data signal when switching the voltage occurs in the blanking stage and does not affect the brightness. Moreover, since the voltage value of the data signal has been adjusted and tends to be stable when the light-emitting element emits light in the next frame, it can be further ensured that the brightness will not change suddenly when the light-emitting element emits light in the next frame, thereby further improving the display effect of the display panel.

[0007] According to any of the aforementioned implementations of the first aspect of the present application, in the same blanking phase, the voltage value of the power supply voltage signal is adjusted to the first target voltage value, and the voltage value of the data signal is adjusted to the second target voltage value.

[0008] In this way, in the same blanking phase, the voltage value of the power supply voltage signal and the voltage value of the data signal are adjusted at the same time, which not only avoids the influence of the voltage adjustment of the power supply voltage signal on the brightness, but also makes the peak of the data signal when switching the voltage occur in the blanking phase, effectively avoiding the influence of the voltage adjustment of the data signal on the brightness, greatly improving the screen flickering phenomenon when adjusting the display brightness, and improving the display effect of the display panel.

[0009] According to any of the aforementioned embodiments of the first aspect of the present application, the blanking phase includes N sub-phases, the duration of the sub-phase is greater than or equal to the switching duration of the power supply voltage signal, the switching duration is the duration for the power supply voltage signal to adjust from the first voltage value to the first target voltage value, the first voltage value is the voltage value of the power supply voltage signal corresponding to the brightness level before switching, N≥2 and is an integer; in the blanking phase before the effective display phase of the next frame, the voltage value of the power supply voltage signal is adjusted to the first target voltage value, specifically including: before the start time of the Nth sub-phase, starting the operation of adjusting the voltage value of the power supply voltage signal.

[0010] In this way, since the duration of each sub-stage is greater than or equal to the switching duration of the power supply voltage signal, the operation of adjusting the voltage value of the power supply voltage signal is started before the starting time of the Nth sub-stage, which can ensure that the voltage value of the power supply voltage signal is adjusted during the blanking stage, so that when the light-emitting element emits light in the next frame, the voltage value of the power supply voltage signal tends to be stable, effectively avoiding a sudden change in brightness when the light-emitting element emits light in the next frame, thereby improving the screen flickering phenomenon when the display brightness is adjusted and improving the display effect of the display panel.

[0011] According to any of the aforementioned embodiments of the first aspect of the present application, in a blanking phase before an effective display phase of a next frame, before adjusting the voltage value of the power supply voltage signal to a first target voltage value, the driving method further includes: obtaining a first voltage value of the power supply voltage signal corresponding to the brightness level before switching; determining whether the difference between the first target voltage value and the first voltage value is greater than a first preset threshold value; in a blanking phase before an effective display phase of the next frame, adjusting the voltage value of the power supply voltage signal to the first target voltage value, specifically including: when the difference between the first target voltage value and the first voltage value is greater than the first preset threshold value, adjusting the power supply voltage signal from the first voltage value to the first target voltage value in multiple times.

[0012] In this way, since the display panel contains electronic devices such as transistors, when the voltage values ​​before and after the power supply voltage signal is switched differ greatly, the power supply voltage signal is adjusted from the first voltage value to the first target voltage value multiple times, which can effectively avoid the impact of the power supply voltage signal with a large voltage difference on the circuit in the display panel, thereby increasing the life of the electronic devices in the display panel and improving the circuit stability.

[0013] According to any of the aforementioned implementations of the first aspect of the present application, the power supply voltage signal is adjusted from the first voltage value to the first target voltage value in multiple times, specifically including: determining a third target voltage value based on the first target voltage value and the first voltage value, the third target voltage value being between the first target voltage value and the first voltage value; adjusting the power supply voltage signal from the first voltage value to the third target voltage value; adjusting the power supply voltage signal from the third target voltage value to the first target voltage value.

[0014] In this way, since the display panel contains electronic devices such as transistors, when the voltage values ​​before and after the power supply voltage signal is switched differ greatly, the power supply voltage signal can be first adjusted from the first voltage value to the third target voltage value, and then the power supply voltage signal can be adjusted from the third target voltage value to the first target voltage value. This can effectively avoid the impact of the power supply voltage signal with a large voltage difference on the circuit in the display panel, thereby increasing the life of the electronic devices in the display panel and improving the circuit stability.

[0015] According to any of the aforementioned embodiments of the first aspect of the present application, in a blanking phase before an effective display phase of a next frame, before adjusting the voltage value of the data signal to a second target voltage value, the driving method further includes: obtaining a second voltage value of the data signal corresponding to the brightness level before switching; determining whether the difference between the second target voltage value and the second voltage value is greater than a second preset threshold value; in a blanking phase before an effective display phase of the next frame, adjusting the voltage value of the data signal to the second target voltage value, specifically including: when the difference between the second target voltage value and the second voltage value is greater than the second preset threshold value, adjusting the data signal from the second voltage value to the second target voltage value in multiple times.

[0016] In this way, since the display panel contains electronic devices such as transistors, when the voltage values ​​before and after the data signal is switched differ greatly, the data signal is adjusted from the second voltage value to the second target voltage value multiple times, which can effectively avoid the impact of the data signal with a large voltage difference on the circuit in the display panel, thereby increasing the life of the electronic devices in the display panel and improving the circuit stability.

[0017] According to any of the aforementioned implementations of the first aspect of the present application, the data signal is adjusted from the second voltage value to the second target voltage value in multiple times, specifically including: determining a fourth target voltage value based on the second target voltage value and the second voltage value, the fourth target voltage value being between the second target voltage value and the second voltage value; adjusting the data signal from the second voltage value to the fourth target voltage value; adjusting the data signal from the fourth target voltage value to the second target voltage value.

[0018] In this way, since the display panel contains electronic devices such as transistors, when the voltage values ​​before and after the data signal switching differ greatly, the data signal can be first adjusted from the second voltage value to the fourth target voltage value, and then the data signal can be adjusted from the fourth target voltage value to the second target voltage value. This can effectively avoid the impact of the data signal with a large voltage difference on the circuit in the display panel, thereby increasing the life of the electronic devices in the display panel and improving the circuit stability.

[0019] According to any of the aforementioned embodiments of the first aspect of the present application, in a blanking stage before an effective display stage of a next frame, before adjusting the voltage value of the data signal to a second target voltage value, the driving method further includes: obtaining a first voltage value of a power supply voltage signal corresponding to a brightness level before switching; determining whether a difference between the first target voltage value and the first voltage value is greater than a first preset threshold value; in a blanking stage before an effective display stage of a next frame, adjusting the voltage value of the data signal to a second target voltage value, specifically including: when the difference between the first target voltage value and the first voltage value is greater than the first preset threshold value, first adjusting the voltage value of the power supply voltage signal to the first target voltage value, and after the voltage value of the power supply voltage signal is adjusted to the first target voltage value, adjusting the voltage value of the data signal to the second target voltage value.

[0020] When the voltage values ​​before and after the power supply voltage signal is switched differ greatly, if the voltage value of the power supply voltage signal and the voltage value of the data signal are adjusted at the same time, the output pressure of the driver chip may be significantly increased, and the impact of the power supply voltage signal and the data signal on the circuit in the display panel may be increased. Therefore, when the voltage value before and after the power supply voltage signal is switched differs greatly, the voltage value of the power supply voltage signal may be adjusted first, and after the voltage value of the power supply voltage signal is adjusted, the voltage value of the data signal may be adjusted, so as to better ensure that the voltages of the power supply voltage signal and the data signal can be adjusted in the blanking stage, reduce the output pressure of the driver chip, and reduce the impact of the power supply voltage signal and the data signal on the circuit in the display panel.

[0021] According to any of the aforementioned embodiments of the first aspect of the present application, in the blanking phase before the effective display phase of the next frame, the voltage value of the power supply voltage signal is adjusted to the first target voltage value, specifically including: detecting whether the data transmission synchronization signal is at the cut-off level; when the data transmission synchronization signal is at the cut-off level, adjusting the voltage value of the power supply voltage signal to the first target voltage value; and / or, when the data transmission synchronization signal is at the on-level, continuously or at intervals of a preset time length detecting whether the data transmission synchronization signal is at the cut-off level until the data transmission synchronization signal is at the cut-off level, adjusting the voltage value of the power supply voltage signal to the first target voltage value.

[0022] In this way, by detecting whether the data transmission synchronization signal is at the cut-off level, it is possible to accurately determine whether the current state is in the blanking stage, thereby ensuring that the voltage value of the power supply voltage signal can be adjusted in the blanking stage, improving the screen flickering phenomenon during display brightness adjustment, and improving the display effect of the display panel.

[0023] According to any of the aforementioned embodiments of the first aspect of the present application, the effective display stage includes a data writing stage and a light-emitting stage; in the blanking stage before the effective display stage of the next frame, after the voltage value of the power supply voltage signal is adjusted to the first target voltage value, the method also includes: in the data writing stage, detecting whether the voltage value of the power supply voltage signal is equal to the first target voltage value, and / or detecting whether the voltage value of the data signal is equal to the second target voltage value; when the voltage value of the power supply voltage signal is not equal to the first target voltage value, adjusting the voltage value of the power supply voltage signal to the first target voltage value; when the voltage value of the data signal is not equal to the second target voltage value, adjusting the voltage value of the data signal to the second target voltage value.

[0024] In this way, after the voltage value of the power supply voltage signal and / or the voltage value of the data signal are adjusted in the blanking phase, before the light-emitting phase of the next frame, it is detected again whether the voltage value of the power supply voltage signal is equal to the first target voltage value, and / or whether the voltage value of the data signal is equal to the second target voltage value. When the voltage value of the power supply voltage signal is not equal to the first target voltage value and / or the voltage value of the data signal is not equal to the second target voltage value, the voltage value of the power supply voltage signal and / or the voltage value of the data signal are adjusted to ensure that the brightness of the light-emitting element in the next frame reaches the expected brightness and reduce the brightness deviation.

[0025] In a second aspect, an embodiment of the present application provides an electronic device, comprising: a processor, a memory, and a computer program stored in the memory and executable on the processor, wherein when the computer program is executed by the processor, the steps of the display panel driving method provided in the first aspect are implemented.

[0026] In a third aspect, an embodiment of the present application provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the display panel driving method provided in the first aspect are implemented.

[0027] The driving method, device and computer-readable storage medium of the display panel of the embodiment of the present application, when the switching brightness level is detected, adjusts the voltage value of the power supply voltage signal to the first target voltage value in the blanking stage before the effective display stage of the next frame. Since the light-emitting element in the display panel does not emit light in the blanking stage, adjusting the voltage value of the power supply voltage signal in the blanking stage will not affect the brightness. Moreover, since the voltage value of the power supply voltage signal has been adjusted and tends to be stable when the light-emitting element emits light in the next frame, the brightness will not change suddenly when the light-emitting element emits light in the next frame, thereby improving the flickering phenomenon when the display brightness is adjusted and improving the display effect of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solution of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0029] Figure 1 A schematic diagram of the brightness change of the display panel at a certain gray scale at 120Hz;

[0030] Figure 2 A timing diagram of a display panel provided in an embodiment of the present application;

[0031] Figure 3 A schematic diagram of a flow chart of a method for driving a display panel provided in an embodiment of the present application;

[0032] Figure 4 Another timing diagram of a display panel provided in an embodiment of the present application;

[0033] Figure 5 Another schematic diagram of a flow chart of a method for driving a display panel provided in an embodiment of the present application;

[0034] Figure 6 Another timing diagram of a display panel provided in an embodiment of the present application;

[0035] Figure 7 A schematic diagram of another flow chart of a method for driving a display panel provided in an embodiment of the present application;

[0036] Figure 8 A schematic diagram of another flow chart of a method for driving a display panel provided in an embodiment of the present application;

[0037] Fig. 9 A schematic diagram of another flow chart of a method for driving a display panel provided in an embodiment of the present application;

[0038] Fig.10Another timing diagram of a display panel provided in an embodiment of the present application;

[0039] Fig.11 A schematic diagram of a flow chart of S302 in the display panel driving method provided in an embodiment of the present application;

[0040] Fig.12 A circuit diagram of a pixel circuit of a display panel provided in an embodiment of the present application;

[0041] Fig.13 A schematic diagram of another flow chart of a method for driving a display panel provided in an embodiment of the present application;

[0042] Fig.14 A schematic diagram of a structure of a driving device for a display panel provided in an embodiment of the present application;

[0043] Fig.15 A schematic diagram of the hardware structure of an electronic device provided in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0044] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating the examples of the present application.

[0045] 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 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 device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0046] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0047] It should be noted that the transistor in the embodiment of the present application can be an N-type transistor or a P-type transistor. For an N-type transistor, the on-level is a high level and the off-level is a low level. That is, when the gate of the N-type transistor is at a high level, the first and second poles thereof are connected, and when the gate of the N-type transistor is at a low level, the first and second poles thereof are disconnected. For a P-type transistor, the on-level is a low level and the off-level is a high level. That is, when the control pole of the P-type transistor is at a low level, the first and second poles thereof are connected, and when the control terminal of the P-type transistor is at a high level, the first and second poles thereof are disconnected. In a specific implementation, the gate of each of the above-mentioned transistors is used as its control pole, and, according to the signal of the gate of each transistor and its type, the first pole thereof can be used as the source and the second pole as the drain, or the first pole thereof can be used as the drain and the second pole as the source, and no distinction is made here. In addition, the on-level and the off-level in the embodiment of the present invention are both general terms, and the on-level refers to any level that can turn on the transistor, and the off-level refers to any level that can turn off / turn off the transistor.

[0048] In the embodiments of the present application, the term “electrically connected” may refer to a direct electrical connection between two components, or may refer to an electrical connection between two components via one or more other components.

[0049] In the embodiment of the present application, the first node is defined only for the convenience of describing the circuit structure, and the first node is not an actual circuit unit.

[0050] It is obvious to those skilled in the art that various modifications and changes can be made in the present application without departing from the spirit or scope of the present application. Therefore, the present application is intended to cover modifications and changes of the present application that fall within the scope of the corresponding claims (technical solutions for protection) and their equivalents. It should be noted that the implementation methods provided in the embodiments of the present application can be combined with each other without contradiction.

[0051] Before describing the technical solutions provided by the embodiments of the present application, in order to facilitate the understanding of the embodiments of the present application, the present application first specifically describes the problems existing in the related art:

[0052] As mentioned above, the inventors of the present application have found through research that when the existing display panel is adjusting the display brightness, there is a sudden change in display brightness, namely, a screen flickering phenomenon, which not only affects the display effect but also reduces the user experience.

[0053] In order to solve the problem of sudden change in display brightness when adjusting the display brightness, the inventor of the present application first studied and analyzed the root cause of the above technical problem. The specific research and analysis process is as follows:

[0054] The display panel may include multiple brightness levels. In order to reduce power consumption, the voltage values ​​of the power supply voltage signal corresponding to different brightness levels may be different. Figure 1 Schematic diagram of the brightness change of the display panel at a certain gray scale at 120Hz.

[0055] Figure 1 The abscissa in represents the register value of the preset type of register, such as the register value of the 51 register; Figure 1 The vertical axis in represents brightness. The range of register value 51 can be 0 to 4096, and different register values ​​can correspond to different brightness levels. For example, the larger the register value, the greater the brightness level.

[0056] like Figure 1 As shown, when switching the brightness level, the voltage value of the power supply voltage signal changes. Due to the channel length modulation effect of the driving transistor in the display panel, the voltage change of the power supply voltage signal will affect the current of the driving transistor, resulting in a large brightness difference at the voltage turning point of the power supply voltage signal, with obvious steps.

[0057] In view of the above research findings of the inventors, the embodiments of the present application provide a display panel driving method, device and computer-readable storage medium, which can solve the technical problem of sudden change of display brightness when adjusting the display brightness in the related art.

[0058] The technical concept of the embodiment of the present application is that: when the switching brightness level is detected, the voltage value of the power supply voltage signal is adjusted to the first target voltage value in the blanking stage before the effective display stage of the next frame. Since the light-emitting element in the display panel does not emit light in the blanking stage, adjusting the voltage value of the power supply voltage signal in the blanking stage will not affect the brightness. Moreover, since the voltage value of the power supply voltage signal has been adjusted and tends to be stable when the light-emitting element emits light in the next frame, the brightness will not change suddenly when the light-emitting element emits light in the next frame, thereby improving the screen flickering phenomenon when the display brightness is adjusted and improving the display effect of the display panel.

[0059] The following first introduces a driving method of a display panel provided in an embodiment of the present application.

[0060] Figure 2A timing diagram of a display panel provided in an embodiment of the present application. Figure 2 As shown, a frame H of the display panel may include an effective display phase h1 and a blanking phase h2. Among them, the blanking phase h2 can be understood as the front porch (Front-Porch) or the back porch (Back-Porch) of the display. The front porch is the invalid row scanning time at the beginning of the current frame after the effective display phase h1 of the previous frame. The back porch is the invalid row scanning time from the end of one frame data output to the beginning of the effective display phase h1 of the next frame. In the blanking phase h2, the light-emitting element in the display panel does not emit light. Figure 2 The blanking stage h2 is used as the back porch as an illustration, that is, the blanking stage h2 is located after the effective display stage h1 of the current frame. Of course, in other examples, the blanking stage h2 can also be the front porch, that is, the blanking stage h2 is located before the effective display stage h1 of the current frame, which is not limited in the embodiments of the present application.

[0061] Figure 3 A schematic diagram of a process flow of a method for driving a display panel provided in an embodiment of the present application. Figure 3 As shown, the driving method may include the following steps S301 and S302.

[0062] S301 . When it is detected that the brightness level is switched, determine a first target voltage value of a power supply voltage signal corresponding to the brightness level to be switched.

[0063] For example, the current brightness level is the first brightness level, and the brightness level to be switched is the second brightness level. When an instruction to switch the brightness level of the display panel from the first brightness level to the second brightness level is received, a first target voltage value of the power supply voltage signal corresponding to the second brightness level can be determined. Specifically, the power supply voltage signal can be a voltage signal output by the negative power supply voltage signal line ELVSS. The following will take the 2T1C pixel circuit as an example for specific description, which will not be repeated here.

[0064] In some specific examples, the voltage value of the power supply voltage signal corresponding to each brightness level can be preset, for example, a corresponding relationship between the brightness level and the voltage value of the power supply voltage signal is established. In S301, the voltage value of the power supply voltage signal corresponding to the brightness level to be switched can be determined according to the pre-established corresponding relationship between the brightness level and the voltage value of the power supply voltage signal. For the convenience of description and distinction, the voltage value of the power supply voltage signal corresponding to the brightness level to be switched is referred to as the first target voltage value.

[0065] S302 , in a blanking phase before an effective display phase of a next frame, adjusting the voltage value of the power supply voltage signal to a first target voltage value.

[0066] like Figure 2 As shown, taking the blanking stage h2 as an example, when the instruction to switch the brightness level is received in the i-th frame, the voltage value of the power supply voltage signal can be adjusted to the first target voltage value in the blanking stage h2 before the effective display stage h1 of the i+1 frame, such as the blanking stage h2 of the i-th frame, where i is a positive integer.

[0067] It is easy to understand that when the blanking stage h2 is the front porch, that is, the blanking stage h2 is located before the effective display stage h1 of the current frame, the voltage value of the power supply voltage signal can be adjusted to the first target voltage value in the blanking stage h2 of the i+1th frame.

[0068] In the driving method of the display panel of the embodiment of the present application, when the switching brightness level is detected, the voltage value of the power supply voltage signal is adjusted to the first target voltage value in the blanking stage before the effective display stage of the next frame. Since the light-emitting element in the display panel does not emit light in the blanking stage, adjusting the voltage value of the power supply voltage signal in the blanking stage will not affect the brightness. Moreover, since the voltage value of the power supply voltage signal has been adjusted and tends to be stable when the light-emitting element emits light in the next frame, the brightness will not change suddenly when the light-emitting element emits light in the next frame, thereby improving the flickering screen phenomenon when the display brightness is adjusted and improving the display effect of the display panel.

[0069] Figure 4 Another timing diagram of a display panel provided in an embodiment of the present application is shown in FIG. Figure 4 As shown, the inventor of the present application further discovered that a spike a (ie, instantaneous voltage jump) may occur when the data signal switches the voltage. If the spike a occurs in the effective display stage h1, the brightness of the light-emitting element may suddenly change.

[0070] In view of this, if Figure 5 As shown, according to some embodiments of the present application, optionally, the driving method may include the following steps S501 and S502.

[0071] S501 : When it is detected that the brightness level is switched, determine a second target voltage value of a data signal corresponding to the brightness level to be switched.

[0072] In some specific examples, the voltage value of the data signal corresponding to each brightness level can be preset, for example, a corresponding relationship between the brightness level and the voltage value of the data signal is established. In S501, the voltage value of the data signal corresponding to the brightness level to be switched can be determined according to the pre-established corresponding relationship between the brightness level and the voltage value of the data signal. For the convenience of description and distinction, the voltage value of the data signal corresponding to the brightness level to be switched is referred to as the second target voltage value.

[0073] S502 , in a blanking phase before an effective display phase of a next frame, adjusting the voltage value of the data signal to a second target voltage value.

[0074] like Figure 4 As shown, taking the blanking stage h2 as an example, when the instruction to switch the brightness level is received in the i-th frame, the voltage value of the data signal can be called the second target voltage value in the blanking stage h2 before the effective display stage h1 of the i+1 frame, such as the blanking stage h2 of the i-th frame.

[0075] It is easy to understand that when the blanking stage h2 is the front porch, that is, the blanking stage h2 is located before the effective display stage h1 of the current frame, the voltage value of the data signal can be adjusted to the second target voltage value in the blanking stage h2 of the i+1th frame.

[0076] In this way, when the switching brightness level is detected, the voltage value of the data signal is adjusted to the second target voltage value in the blanking stage before the effective display stage of the next frame. Adjusting the voltage value of the data signal in the blanking stage can make the peak of the data signal when switching the voltage occur in the blanking stage. Since the light-emitting element in the display panel does not emit light in the blanking stage, the peak of the data signal when switching the voltage occurs in the blanking stage and does not affect the brightness. Moreover, since the voltage value of the data signal has been adjusted and tends to be stable when the light-emitting element emits light in the next frame, it can be further ensured that the brightness will not change suddenly when the light-emitting element emits light in the next frame, thereby further improving the display effect of the display panel.

[0077] In some specific embodiments, in the same blanking phase h2, the voltage value of the power supply voltage signal can be adjusted to the first target voltage value, and the voltage value of the data signal can be adjusted to the second target voltage value.

[0078] For example, when an instruction to switch the brightness level is received in the i-th frame, the voltage value of the power supply voltage signal can be adjusted to the first target voltage value in the blanking stage h2 before the effective display stage h1 of the i+1 frame, such as the blanking stage h2 of the i-th frame, and the voltage value of the data signal is called the second target voltage value.

[0079] In this way, in the same blanking phase, the voltage value of the power supply voltage signal and the voltage value of the data signal are adjusted at the same time, which not only avoids the influence of the voltage adjustment of the power supply voltage signal on the brightness, but also makes the peak of the data signal when switching the voltage occur in the blanking phase, effectively avoiding the influence of the voltage adjustment of the data signal on the brightness, greatly improving the screen flickering phenomenon when adjusting the display brightness, and improving the display effect of the display panel.

[0080] Figure 6 Another timing diagram of a display panel provided in an embodiment of the present application is shown in FIG. Figure 6 As shown, the inventor of the present application considers that in practical applications, the voltage adjustment of the power supply voltage signal may be a process. If the power supply voltage signal fails to complete the voltage adjustment in the blanking phase, it may cause a brightness jump when the light emitting element emits light in the next frame.

[0081] In view of this, according to some embodiments of the present application, optionally, the blanking phase h2 may include N sub-phases h21~h2n, where N≥2 and is an integer. The duration of each sub-phase may be greater than or equal to the switching duration of the power supply voltage signal. Among them, the switching duration is the duration for the power supply voltage signal to be adjusted from the first voltage value to the first target voltage value, and the first voltage value is the voltage value of the power supply voltage signal corresponding to the brightness level before switching. For example, the switching duration of the power supply voltage signal can be predetermined according to historical data. For example, in the historical data, the switching duration for the power supply voltage signal to be adjusted from the voltage value v1 to the voltage value v2 is Δt. Then, the duration of each sub-phase may be greater than or equal to Δt. Exemplarily, the voltage value v1 may be, for example, the voltage value of the power supply voltage signal corresponding to the lowest brightness level among multiple brightness levels, and the voltage value v2 may be, for example, the voltage value of the power supply voltage signal corresponding to the highest brightness level among multiple brightness levels. Of course, in other examples, the voltage value v1 may also be the voltage value of the power supply voltage signal corresponding to the highest brightness level among multiple brightness levels, and the voltage value v2 may be, for example, the voltage value of the power supply voltage signal corresponding to the lowest brightness level among multiple brightness levels.

[0082] Accordingly, S302, in a blanking phase before an effective display phase of a next frame, adjusting the voltage value of the power supply voltage signal to a first target voltage value may specifically include the following steps:

[0083] Before the start time of the Nth sub-phase h2n, the operation of adjusting the voltage value of the power supply voltage signal begins to be executed.

[0084] In this way, since the duration of each sub-stage is greater than or equal to the switching duration of the power supply voltage signal, the operation of adjusting the voltage value of the power supply voltage signal is started before the starting time of the Nth sub-stage, which can ensure that the voltage value of the power supply voltage signal is adjusted during the blanking stage, so that when the light-emitting element emits light in the next frame, the voltage value of the power supply voltage signal tends to be stable, effectively avoiding a sudden change in brightness when the light-emitting element emits light in the next frame, thereby improving the screen flickering phenomenon when the display brightness is adjusted and improving the display effect of the display panel.

[0085] Similarly, the duration of each sub-stage may also be greater than or equal to the switching duration of the data signal. The switching duration of the data signal is the duration of the data signal adjusting from the second voltage value to the second target voltage value, and the second voltage value is the voltage value of the data signal corresponding to the brightness level before the switching. Accordingly, S502, in the blanking phase before the effective display phase of the next frame, adjusting the voltage value of the data signal to the second target voltage value may specifically include the following steps:

[0086] Before the start time of the Nth sub-phase h2n, the operation of adjusting the voltage value of the data signal begins to be performed.

[0087] In this way, since the duration of each sub-stage is greater than or equal to the switching duration of the data signal, the operation of adjusting the voltage value of the data signal is started before the starting time of the Nth sub-stage, which can ensure that the voltage value of the data signal is adjusted during the blanking stage, so that when the light-emitting element emits light in the next frame, the voltage value of the data signal tends to be stable, effectively avoiding a sudden change in brightness when the light-emitting element emits light in the next frame, thereby improving the screen flickering phenomenon when the display brightness is adjusted and improving the display effect of the display panel.

[0088] Figure 7 FIG. 2 is another flow chart of a method for driving a display panel provided in an embodiment of the present application. Figure 7 As shown, according to some embodiments of the present application, optionally, before S302, the driving method may further include the following steps S701 and S702.

[0089] S701. Obtain a first voltage value of a power supply voltage signal corresponding to a brightness level before switching.

[0090] For example, if the current brightness level is the first brightness level and the brightness level to be switched is the second brightness level. When an instruction to switch the brightness level of the display panel from the first brightness level to the second brightness level is received, the voltage value of the power supply voltage signal corresponding to the first brightness level can be determined. For ease of distinction, the voltage value of the power supply voltage signal corresponding to the first brightness level can be referred to as the first voltage value.

[0091] S702: Determine whether the difference between the first target voltage value and the first voltage value is greater than a first preset threshold.

[0092] The specific value of the first preset threshold can be flexibly set according to actual conditions, and the embodiment of the present application does not limit this. The main function of introducing the first preset threshold is to determine whether the voltage value before and after the power supply voltage signal is switched is greatly different.

[0093] Accordingly, S302, in a blanking phase before an effective display phase of a next frame, adjusting the voltage value of the power supply voltage signal to a first target voltage value may specifically include the following steps:

[0094] When the difference between the first target voltage value and the first voltage value is greater than the first preset threshold, the power supply voltage signal is adjusted from the first voltage value to the first target voltage value in multiple times. That is, when the voltage values ​​before and after the power supply voltage signal are greatly different, the power supply voltage signal can be gradually adjusted from the first voltage value to the first target voltage value in multiple times.

[0095] In this way, since the display panel contains electronic devices such as transistors, when the voltage values ​​before and after the power supply voltage signal is switched differ greatly, the power supply voltage signal is adjusted from the first voltage value to the first target voltage value multiple times, which can effectively avoid the impact of the power supply voltage signal with a large voltage difference on the circuit in the display panel, thereby increasing the life of the electronic devices in the display panel and improving the circuit stability.

[0096] In some specific embodiments, optionally, adjusting the power supply voltage signal from the first voltage value to the first target voltage value in multiple times may specifically include the following steps 1 to 3.

[0097] Step 1: Determine a third target voltage value according to the first target voltage value and the first voltage value, wherein the third target voltage value is between the first target voltage value and the first voltage value.

[0098] For example, in some examples, the average of the first target voltage value and the first voltage value can be calculated, and the average value can be used as the third target voltage value. Of course, the third target voltage value can also be any voltage value between the first target voltage value and the first voltage value, and the embodiment of the present application is not limited to this.

[0099] Step 2: adjusting the power voltage signal from the first voltage value to a third target voltage value.

[0100] Step 3: Adjust the power supply voltage signal from the third target voltage value to the first target voltage value

[0101] In this way, since the display panel contains electronic devices such as transistors, when the voltage values ​​before and after the power supply voltage signal is switched differ greatly, the power supply voltage signal can be first adjusted from the first voltage value to the third target voltage value, and then the power supply voltage signal can be adjusted from the third target voltage value to the first target voltage value. This can effectively avoid the impact of the power supply voltage signal with a large voltage difference on the circuit in the display panel, thereby increasing the life of the electronic devices in the display panel and improving the circuit stability.

[0102] Figure 8FIG. 2 is another flow chart of a method for driving a display panel provided in an embodiment of the present application. Figure 8 As shown, according to some embodiments of the present application, optionally, before S502, the driving method may further include the following steps S801 and S802.

[0103] S801. Obtain a second voltage value of a data signal corresponding to a brightness level before switching.

[0104] For example, if the current brightness level is the first brightness level and the brightness level to be switched is the second brightness level. When an instruction is received to switch the brightness level of the display panel from the first brightness level to the second brightness level, the voltage value of the data signal corresponding to the first brightness level can be determined. For ease of distinction, the voltage value of the data signal corresponding to the first brightness level can be referred to as the second voltage value.

[0105] S802: Determine whether the difference between the second target voltage value and the second voltage value is greater than a second preset threshold.

[0106] The specific value of the second preset threshold can be flexibly set according to actual conditions, and the embodiment of the present application does not limit this. The main function of introducing the second preset threshold is to determine whether the voltage value before and after the data signal switching is greatly different.

[0107] Accordingly, S502, in a blanking phase before an effective display phase of a next frame, adjusting the voltage value of the data signal to a second target voltage value may specifically include the following steps:

[0108] When the difference between the second target voltage value and the second voltage value is greater than the second preset threshold, the data signal is adjusted from the second voltage value to the second target voltage value in multiple times. That is, when the voltage values ​​before and after the data signal switching differ greatly, the voltage value of the data signal can be gradually adjusted from the second voltage value to the second target voltage value in multiple times.

[0109] In this way, since the display panel contains electronic devices such as transistors, when the voltage values ​​before and after the data signal is switched differ greatly, the data signal is adjusted from the second voltage value to the second target voltage value multiple times, which can effectively avoid the impact of the data signal with a large voltage difference on the circuit in the display panel, thereby increasing the life of the electronic devices in the display panel and improving the circuit stability.

[0110] In some specific embodiments, optionally, adjusting the data signal from the second voltage value to the second target voltage value in multiple times may specifically include the following steps 1 to 3.

[0111] Step 1: Determine a fourth target voltage value according to the second target voltage value and the second voltage value, wherein the fourth target voltage value is between the second target voltage value and the second voltage value.

[0112] For example, in some examples, the average of the second target voltage value and the second voltage value can be calculated, and the average value can be used as the fourth target voltage value. Of course, the fourth target voltage value can also be any voltage value between the second target voltage value and the second voltage value, and the embodiment of the present application is not limited to this.

[0113] Step 2: adjusting the data signal from the second voltage value to a fourth target voltage value.

[0114] Step 3: Adjust the data signal from the fourth target voltage value to the second target voltage value.

[0115] In this way, since the display panel contains electronic devices such as transistors, when the voltage values ​​before and after the data signal switching differ greatly, the data signal can be first adjusted from the second voltage value to the fourth target voltage value, and then the data signal can be adjusted from the fourth target voltage value to the second target voltage value. This can effectively avoid the impact of the data signal with a large voltage difference on the circuit in the display panel, thereby increasing the life of the electronic devices in the display panel and improving the circuit stability.

[0116] In some embodiments, optionally, the voltage values ​​of the power supply voltage signal and the data signal can be adjusted simultaneously, that is, the voltage value of the data signal is adjusted while the power supply voltage signal is adjusted, thereby shortening the time for adjusting the voltage.

[0117] However, the inventors of the present application realized that when the voltage values ​​before and after the power supply voltage signal is switched differ greatly, if the voltage value of the power supply voltage signal and the voltage value of the data signal are adjusted at the same time, the output pressure of the driving chip may be significantly increased, as well as the impact of the power supply voltage signal and the data signal on the circuit in the display panel may be increased.

[0118] In view of this, the present application considers that when the voltage value before and after the power supply voltage signal is switched differs greatly, the voltage value of the power supply voltage signal can be adjusted first, and after the voltage value of the power supply voltage signal is adjusted, the voltage value of the data signal can be adjusted, thereby better ensuring that the voltages of the power supply voltage signal and the data signal can be adjusted during the blanking stage, reducing the output pressure of the driving chip and reducing the impact of the power supply voltage signal and the data signal on the circuit in the display panel.

[0119] Fig. 9 FIG. 2 is another flow chart of a method for driving a display panel provided in an embodiment of the present application. Fig. 9As shown, according to some embodiments of the present application, optionally, before S502, the driving method may further include the following steps S901 and S902.

[0120] S901. Obtain a first voltage value of a power supply voltage signal corresponding to a brightness level before switching.

[0121] S902: Determine whether the difference between the first target voltage value and the first voltage value is greater than a first preset threshold.

[0122] For the specific implementation process of S901 and S902, please refer to the description of S701 and S702 above, which will not be repeated here.

[0123] Accordingly, S502, in a blanking phase before an effective display phase of a next frame, adjusting the voltage value of the data signal to a second target voltage value may specifically include the following steps:

[0124] When the difference between the first target voltage value and the first voltage value is greater than the first preset threshold, the voltage value of the power voltage signal is first adjusted to the first target voltage value, and after the voltage value of the power voltage signal is adjusted to the first target voltage value, the voltage value of the data signal is adjusted to the second target voltage value. That is, when the voltage values ​​of the power voltage signal before and after switching differ greatly, the power voltage signal with the larger voltage difference is adjusted first, and then the data signal is adjusted.

[0125] In this way, when the voltage value before and after the power supply voltage signal is switched differs greatly, the voltage value of the power supply voltage signal can be adjusted first, and after the voltage value of the power supply voltage signal is adjusted, the voltage value of the data signal can be adjusted, thereby better ensuring that the voltages of the power supply voltage signal and the data signal can be adjusted during the blanking stage, reducing the output pressure of the driving chip, and reducing the impact of the power supply voltage signal and the data signal on the circuit in the display panel.

[0126] Similarly, in other embodiments, optionally, when the voltage values ​​of the data signal before and after switching differ greatly, the voltage value of the data signal may be adjusted first, and then the voltage value of the power supply voltage signal may be adjusted after the voltage value of the data signal is adjusted.

[0127] Fig.10 Another timing diagram of a display panel provided in an embodiment of the present application is shown in FIG. Fig.10As shown, the embodiment of the present application can synchronize the transmission of data by driving the data transmission synchronization signal TE inside the chip. In the effective display stage h1, the data transmission synchronization signal TE can be a conductive level (such as a low level). In the blanking stage h2, the data transmission synchronization signal TE can be a cut-off level (such as a high level). Therefore, it can be determined whether the current state is in the blanking stage h2 by detecting whether the level of the data transmission synchronization signal TE is the cut-off level.

[0128] Fig.11 Schematic diagram of a flow chart of S302 in the method for driving a display panel provided in an embodiment of the present application. Fig.11 As shown, according to some embodiments of the present application, optionally, S302, in the blanking phase before the effective display phase of the next frame, the voltage value of the power supply voltage signal is adjusted to the first target voltage value, which can specifically include the following steps S1101 to S1103.

[0129] S1101, detecting whether the data transmission synchronization signal is at a cut-off level;

[0130] S1102: When the data transmission synchronization signal is at a cut-off level, adjusting the voltage value of the power supply voltage signal to a first target voltage value. And / or,

[0131] S1103, when the data transmission synchronization signal is at the on level, continuously or every preset time period detect whether the data transmission synchronization signal is at the off level until the data transmission synchronization signal is at the off level, and adjust the voltage value of the power supply voltage signal to the first target voltage value.

[0132] In this way, by detecting whether the data transmission synchronization signal is at the cut-off level, it is possible to accurately determine whether the current state is in the blanking stage, thereby ensuring that the voltage value of the power supply voltage signal can be adjusted in the blanking stage, improving the screen flickering phenomenon during display brightness adjustment, and improving the display effect of the display panel.

[0133] Similarly, according to some embodiments of the present application, optionally, S502, in a blanking phase before an effective display phase of a next frame, adjusting the voltage value of the data signal to a second target voltage value, may specifically include the following steps:

[0134] Step 1: Detect whether the data transmission synchronization signal is at a cut-off level;

[0135] Step 2: When the data transmission synchronization signal is at a cut-off level, adjusting the voltage value of the data signal to a second target voltage value; and / or,

[0136] Step 3: When the data transmission synchronization signal is at the on level, continuously or every preset time period, detect whether the data transmission synchronization signal is at the off level until the data transmission synchronization signal is at the off level, and adjust the voltage value of the data signal to the second target voltage value.

[0137] In this way, by detecting whether the data transmission synchronization signal is at the cut-off level, it is possible to accurately determine whether the current state is in the blanking stage, thereby ensuring that the voltage value of the data signal can be adjusted during the blanking stage, improving the screen flickering phenomenon during display brightness adjustment, and improving the display effect of the display panel.

[0138] Fig.12 A circuit diagram of a pixel circuit of a display panel provided in an embodiment of the present application. According to some embodiments of the present application, optionally, the effective display phase includes a data writing phase and a light emitting phase. Fig.12 As shown, taking the 2T1C pixel circuit as an example, the pixel circuit may include a driving transistor T1, a data writing transistor T2 and a storage capacitor Cst. The gate of the driving transistor T1 is electrically connected to the first node N1, the first electrode of the driving transistor T1 is electrically connected to the positive power supply voltage signal line ELVDD, and the second electrode of the driving transistor T1 is electrically connected to the first electrode of the light emitting element D. The second electrode of the light emitting element D is electrically connected to the negative power supply voltage signal line ELVSS. Among them, the first electrode of the light emitting element D may be an anode, and the second electrode of the light emitting element D may be a cathode. The gate of the data writing transistor T2 is electrically connected to the scanning signal line S, the first electrode of the data writing transistor T2 is electrically connected to the data signal line data, and the second electrode of the data writing transistor T2 is electrically connected to the first node N1. In the data writing stage, the data writing transistor T2 is turned on under the control of the scanning signal line S, and the data signal of the data signal line data is written into the first node N1. The storage capacitor Cst is used to maintain the potential of the first node N1. It is easy to understand that the pixel circuit in the embodiment of the present application can also be a 7T1C pixel circuit, a 7T2C pixel circuit, an 8T1C pixel circuit, a 9T1C pixel circuit or other types of pixel circuits, and the embodiment of the present application is not limited to this.

[0139] Fig.13 FIG. 2 is another flow chart of a method for driving a display panel provided in an embodiment of the present application. Fig.13 As shown, according to some embodiments of the present application, optionally, after S302, the driving method may further include the following steps S1301 to S1303.

[0140] S1301. In a data writing phase, detecting whether a voltage value of a power supply voltage signal is equal to a first target voltage value, and / or detecting whether a voltage value of a data signal is equal to a second target voltage value.

[0141] S1302: When the voltage value of the power supply voltage signal is not equal to the first target voltage value, adjust the voltage value of the power supply voltage signal to the first target voltage value.

[0142] S1303: When the voltage value of the data signal is not equal to the second target voltage value, adjust the voltage value of the data signal to the second target voltage value.

[0143] In this way, after the voltage value of the power supply voltage signal and / or the voltage value of the data signal are adjusted in the blanking phase, before the light-emitting phase of the next frame, it is detected again whether the voltage value of the power supply voltage signal is equal to the first target voltage value, and / or whether the voltage value of the data signal is equal to the second target voltage value. When the voltage value of the power supply voltage signal is not equal to the first target voltage value and / or the voltage value of the data signal is not equal to the second target voltage value, the voltage value of the power supply voltage signal and / or the voltage value of the data signal are adjusted to ensure that the brightness of the light-emitting element in the next frame reaches the expected brightness and reduce the brightness deviation.

[0144] Based on the display panel driving method provided in the above embodiment, the present application also provides a display panel driving device accordingly. Please refer to the following embodiment.

[0145] Fig.14 A schematic diagram of a structure of a driving device for a display panel provided in an embodiment of the present application. Fig.14 As shown, the driving device 140 of the display panel provided in the embodiment of the present application may include the following modules:

[0146] A detection module 1401 is used to determine a first target voltage value of a power supply voltage signal corresponding to a brightness level to be switched when a switching brightness level is detected;

[0147] The adjustment module 1402 is used to adjust the voltage value of the power supply voltage signal to a first target voltage value during a blanking phase before an effective display phase of a next frame.

[0148] In the driving device of the display panel of the embodiment of the present application, the detection module 1401 is used to determine the first target voltage value of the power supply voltage signal corresponding to the brightness level to be switched when the switching brightness level is detected; the adjustment module 1402 is used to adjust the voltage value of the power supply voltage signal to the first target voltage value in the blanking stage before the effective display stage of the next frame. Since the light-emitting element in the display panel does not emit light in the blanking stage, adjusting the voltage value of the power supply voltage signal in the blanking stage will not affect the brightness. Moreover, since the voltage value of the power supply voltage signal has been adjusted and tends to be stable when the light-emitting element emits light in the next frame, the brightness will not change suddenly when the light-emitting element emits light in the next frame, thereby improving the screen flickering phenomenon when the display brightness is adjusted and improving the display effect of the display panel.

[0149] In some embodiments, the detection module 1401 is further configured to determine a second target voltage value of the data signal corresponding to the brightness level to be switched when the switching brightness level is detected. The adjustment module 1402 is further configured to adjust the voltage value of the data signal to the second target voltage value during a blanking phase before an effective display phase of the next frame.

[0150] In some embodiments, the adjustment module 1402 is specifically configured to adjust the voltage value of the power supply voltage signal to a first target voltage value and adjust the voltage value of the data signal to a second target voltage value in the same blanking phase.

[0151] In some embodiments, the blanking phase includes N sub-phases, the duration of the sub-phase is greater than or equal to the switching duration of the power supply voltage signal, the switching duration is the duration of the power supply voltage signal adjusting from the first voltage value to the first target voltage value, the first voltage value is the voltage value of the power supply voltage signal corresponding to the brightness level before switching, N≥2 and is an integer. The adjustment module 1402 is specifically used to start the operation of adjusting the voltage value of the power supply voltage signal before the start time of the Nth sub-phase.

[0152] In some embodiments, the driving device 140 of the display panel may further include a judgment module for obtaining a first voltage value of the power supply voltage signal corresponding to the brightness level before switching; and judging whether the difference between the first target voltage value and the first voltage value is greater than a first preset threshold value. The adjustment module 1402 is specifically used to adjust the power supply voltage signal from the first voltage value to the first target voltage value in multiple times when the difference between the first target voltage value and the first voltage value is greater than the first preset threshold value.

[0153] In some embodiments, the adjustment module 1402 is specifically used to determine a third target voltage value based on the first target voltage value and the first voltage value, and the third target voltage value is between the first target voltage value and the first voltage value; adjust the power supply voltage signal from the first voltage value to the third target voltage value; adjust the power supply voltage signal from the third target voltage value to the first target voltage value.

[0154] In some embodiments, the judgment module is further used to obtain a second voltage value of the data signal corresponding to the brightness level before switching; and to judge whether the difference between the second target voltage value and the second voltage value is greater than a second preset threshold. The adjustment module 1402 is specifically used to adjust the data signal from the second voltage value to the second target voltage value in multiple times when the difference between the second target voltage value and the second voltage value is greater than the second preset threshold.

[0155] In some embodiments, the adjustment module 1402 is specifically used to determine a fourth target voltage value based on the second target voltage value and the second voltage value, and the fourth target voltage value is between the second target voltage value and the second voltage value; adjust the data signal from the second voltage value to the fourth target voltage value; adjust the data signal from the fourth target voltage value to the second target voltage value.

[0156] In some embodiments, the driving device 140 of the display panel may further include a judgment module for obtaining a first voltage value of a power supply voltage signal corresponding to a brightness level before switching; and judging whether the difference between the first target voltage value and the first voltage value is greater than a first preset threshold value. The adjustment module 1402 is specifically used to adjust the voltage value of the power supply voltage signal to the first target voltage value first when the difference between the first target voltage value and the first voltage value is greater than the first preset threshold value, and after the voltage value of the power supply voltage signal is adjusted to the first target voltage value, adjust the voltage value of the data signal to the second target voltage value.

[0157] In some embodiments, the detection module 1401 is specifically used to detect whether the data transmission synchronization signal is at a cut-off level, and when the data transmission synchronization signal is at a conduction level, continuously or at intervals of a preset time period to detect whether the data transmission synchronization signal is at a cut-off level until the data transmission synchronization signal is at a cut-off level; the adjustment module 1402 is specifically used to adjust the voltage value of the power supply voltage signal to a first target voltage value when the data transmission synchronization signal is at a cut-off level.

[0158] In some embodiments, the effective display phase includes a data writing phase and a light emitting phase. The display panel driving device 140 may also include a calibration module for detecting whether the voltage value of the power supply voltage signal is equal to the first target voltage value and / or detecting whether the voltage value of the data signal is equal to the second target voltage value during the data writing phase; when the voltage value of the power supply voltage signal is not equal to the first target voltage value, adjusting the voltage value of the power supply voltage signal to the first target voltage value; when the voltage value of the data signal is not equal to the second target voltage value, adjusting the voltage value of the data signal to the second target voltage value.

[0159] Fig.14 Each module / unit in the device shown has the function of implementing each step in the above method embodiment and can achieve its corresponding technical effect. For the sake of concise description, it will not be repeated here.

[0160] Based on the display panel driving method provided in the above embodiment, the present application also provides a specific implementation of the electronic device. Please refer to the following embodiment.

[0161] Fig.15 A schematic diagram of the hardware structure of an electronic device provided in an embodiment of the present application is shown.

[0162] The electronic device may include a processor 1501 and a memory 1502 storing computer program instructions.

[0163] Specifically, the processor 1501 may include a central processing unit (CPU), or an application specific integrated circuit (ASIC), or may be configured to implement one or more integrated circuits of the embodiments of the present application.

[0164] The memory 1502 may include a large capacity memory for data or instructions. By way of example and not limitation, the memory 1502 may include a hard disk drive (HDD), a floppy disk drive, a flash memory, an optical disk, a magneto-optical disk, a magnetic tape, or a universal serial bus (USB) drive or a combination of two or more of these. In one example, the memory 1502 may include a removable or non-removable (or fixed) medium, or the memory 1502 is a non-volatile solid-state memory. The memory 1502 may be inside or outside the integrated gateway disaster recovery device.

[0165] In one example, the memory 1502 may be a read-only memory (ROM). In one example, the ROM may be a mask-programmed ROM, a programmable ROM (PROM), an erasable PROM (EPROM), an electrically erasable PROM (EEPROM), an electrically rewritable ROM (EAROM), or a flash memory, or a combination of two or more of these.

[0166] The memory 1502 may include a read-only memory (ROM), a random access memory (RAM), a magnetic disk storage medium device, an optical storage medium device, a flash memory device, an electrical, optical or other physical / tangible memory storage device. Thus, typically, the memory includes one or more tangible (non-transitory) computer-readable storage media (e.g., a memory device) encoded with software including computer-executable instructions, and when the software is executed (e.g., by one or more processors), it is operable to perform the operations described with reference to the method according to an aspect of the present application.

[0167] The processor 1501 implements the method / steps in the above method embodiment by reading and executing the computer program instructions stored in the memory 1502, and achieves the corresponding technical effects achieved by the above method embodiment executing its method / steps, which will not be repeated here for the sake of brevity.

[0168] In one example, the electronic device may further include a communication interface 1503 and a bus 1510. Fig.15 As shown, the processor 1501, the memory 1502, and the communication interface 1503 are connected via a bus 1510 and communicate with each other.

[0169] The communication interface 1503 is mainly used to implement communication between various modules, devices, units and / or equipment in the embodiments of the present application.

[0170] Bus 1510 includes hardware, software or both, and the parts of electronic equipment are coupled to each other. For example, but not limitation, bus may include accelerated graphics port (Accelerated Graphics Port, AGP) or other graphics bus, enhanced industry standard architecture (Extended Industry Standard Architecture, EISA) bus, front side bus (Front Side Bus, FSB), Hyper Transport (Hyper Transport, HT) interconnection, industry standard architecture (Industry Standard Architecture, ISA) bus, infinite bandwidth interconnection, low pin count (LPC) bus, memory bus, micro channel architecture (MCA) bus, peripheral component interconnection (PCI) bus, PCI-Express (PCI-X) bus, serial advanced technology attachment (SATA) bus, video electronics standard association local (VLB) bus or other suitable bus or two or more of these combinations. In appropriate cases, bus 1510 may include one or more buses. Although the present application embodiment describes and shows a specific bus, the application considers any suitable bus or interconnection.

[0171] In addition, in combination with the driving method of the display panel in the above-mentioned embodiment, the embodiment of the present application may provide a computer-readable storage medium for implementation. The computer-readable storage medium stores computer program instructions; when the computer program instructions are executed by the processor, any one of the driving methods of the display panel in the above-mentioned embodiment is implemented. Examples of computer-readable storage media include non-transitory computer-readable storage media, such as electronic circuits, semiconductor memory devices, ROM, random access memory, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, and hard disks.

[0172] It should be clear that the present application is not limited to the specific configuration and processing described above and shown in the figures. For the sake of simplicity, a detailed description of the known method is omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of the present application is not limited to the specific steps described and shown, and those skilled in the art can make various changes, modifications and additions, or change the order between the steps after understanding the spirit of the present application.

[0173] The functional blocks shown in the above-described block diagram can be implemented as hardware, software, firmware or a combination thereof. When implemented in hardware, it can be, for example, an electronic circuit, an application-specific integrated circuit (Application Specific Integrated Circuit, ASIC), appropriate firmware, plug-in, function card, etc. When implemented in software, the elements of the present application are programs or code segments used to perform the required tasks. The program or code segment can be stored in a machine-readable medium, or transmitted on a transmission medium or communication link by a data signal carried in a carrier. "Machine-readable medium" may include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, optical fiber media, radio frequency (Radio Frequency, RF) links, etc. The code segment can be downloaded via a computer network such as the Internet, an intranet, etc.

[0174] It should also be noted that the exemplary embodiments mentioned in this application describe some methods or systems based on a series of steps or devices. However, this application is not limited to the order of the above steps, that is, the steps can be performed in the order mentioned in the embodiment, or in a different order from the embodiment, or several steps can be performed simultaneously.

[0175] The above reference is according to the method of the embodiment of the present application, the flow chart of the device (system) and the computer program product and / or the block diagram described various aspects of the present application.It should be understood that each square box in the flow chart and / or the block diagram and the combination of each square box in the flow chart and / or the block diagram can be realized by computer program instructions.These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer or other programmable data processing device to produce a machine so that these instructions executed by the processor of the computer or other programmable data processing device enable the realization of the function / action specified in one or more square boxes of the flow chart and / or the block diagram.Such a processor can be but is not limited to a general-purpose processor, a special-purpose processor, a special application processor or a field programmable logic circuit.It can also be understood that each square box in the block diagram and / or the flow chart and the combination of the square boxes in the block diagram and / or the flow chart can also be realized by the dedicated hardware that performs the specified function or action, or can be realized by the combination of dedicated hardware and computer instructions.

[0176] The above is only a specific implementation of the present application. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. It should be understood that the protection scope of the present application is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in this application, and these modifications or replacements should be included in the protection scope of this application.

Claims

1. A method for driving a display panel, characterized in that: The display panel includes a plurality of brightness levels, a frame of the display panel includes an effective display phase and a blanking phase, and the driving method includes: In the case of detecting the switching of the brightness level, determining a first target voltage value of the power supply voltage signal corresponding to the brightness level to be switched; In the blanking phase before the effective display phase of the next frame, adjusting the voltage value of the power supply voltage signal to the first target voltage value; The driving method further includes: In the case of detecting that the brightness level is switched, determining a second target voltage value of the data signal corresponding to the brightness level to be switched; In the blanking phase before the effective display phase of the next frame, the voltage value of the data signal is adjusted to the second target voltage value.

2. The driving method according to claim 1, characterized in that: In the same blanking phase, the voltage value of the power supply voltage signal is adjusted to the first target voltage value, and the voltage value of the data signal is adjusted to the second target voltage value.

3. The driving method according to claim 1, characterized in that: The blanking phase includes N sub-phases, the duration of each sub-phase is greater than or equal to the switching duration of the power supply voltage signal, the switching duration is the duration of the power supply voltage signal adjusting from the first voltage value to the first target voltage value, the first voltage value is the voltage value of the power supply voltage signal corresponding to the brightness level before switching, N≥2 and is an integer; The step of adjusting the voltage value of the power supply voltage signal to the first target voltage value during the blanking phase before the effective display phase of the next frame specifically includes: Before the start time of the Nth sub-phase, the operation of adjusting the voltage value of the power supply voltage signal begins to be executed.

4. The driving method according to claim 1, characterized in that: In the blanking phase before the effective display phase of the next frame, before the voltage value of the power supply voltage signal is adjusted to the first target voltage value, the driving method further includes: Acquire a first voltage value of a power supply voltage signal corresponding to the brightness level before switching; Determining whether a difference between the first target voltage value and the first voltage value is greater than a first preset threshold; The step of adjusting the voltage value of the power supply voltage signal to the first target voltage value during the blanking phase before the effective display phase of the next frame specifically includes: When the difference between the first target voltage value and the first voltage value is greater than the first preset threshold, the power supply voltage signal is adjusted from the first voltage value to the first target voltage value in multiple times.

5. The driving method according to claim 4, characterized in that: The step of adjusting the power supply voltage signal from the first voltage value to the first target voltage value in multiple steps specifically includes: Determine a third target voltage value according to the first target voltage value and the first voltage value, wherein the third target voltage value is between the first target voltage value and the first voltage value; Adjusting the power supply voltage signal from the first voltage value to the third target voltage value; The power supply voltage signal is adjusted from the third target voltage value to the first target voltage value.

6. The driving method according to claim 1, characterized in that: In the blanking phase before the effective display phase of the next frame, before the voltage value of the data signal is adjusted to the second target voltage value, the driving method further includes: Acquire a second voltage value of the data signal corresponding to the brightness level before switching; Determining whether a difference between the second target voltage value and the second voltage value is greater than a second preset threshold; The step of adjusting the voltage value of the data signal to the second target voltage value during the blanking phase before the effective display phase of the next frame specifically includes: When the difference between the second target voltage value and the second voltage value is greater than the second preset threshold, the data signal is adjusted from the second voltage value to the second target voltage value in multiple times.

7. The driving method according to claim 6, characterized in that: The step of adjusting the data signal from the second voltage value to the second target voltage value in multiple steps specifically includes: Determine a fourth target voltage value according to the second target voltage value and the second voltage value, wherein the fourth target voltage value is between the second target voltage value and the second voltage value; Adjusting the data signal from the second voltage value to the fourth target voltage value; The data signal is adjusted from the fourth target voltage value to the second target voltage value.

8. The driving method according to claim 1, characterized in that: In the blanking phase before the effective display phase of the next frame, before the voltage value of the data signal is adjusted to the second target voltage value, the driving method further includes: Acquire a first voltage value of a power supply voltage signal corresponding to the brightness level before switching; Determining whether a difference between the first target voltage value and the first voltage value is greater than a first preset threshold; The step of adjusting the voltage value of the data signal to the second target voltage value during the blanking phase before the effective display phase of the next frame specifically includes: When the difference between the first target voltage value and the first voltage value is greater than the first preset threshold, the voltage value of the power supply voltage signal is first adjusted to the first target voltage value, and after the voltage value of the power supply voltage signal is adjusted to the first target voltage value, the voltage value of the data signal is adjusted to the second target voltage value.

9. The driving method according to claim 1, characterized in that: The step of adjusting the voltage value of the power supply voltage signal to the first target voltage value during the blanking phase before the effective display phase of the next frame specifically includes: Detect whether the data transmission synchronization signal is at a cut-off level; When the data transmission synchronization signal is at a cut-off level, adjusting the voltage value of the power supply voltage signal to the first target voltage value; and / or, When the data transmission synchronization signal is at the on level, the data transmission synchronization signal is continuously or every preset time period detected to see if it is at the off level until the data transmission synchronization signal is at the off level, and the voltage value of the power supply voltage signal is adjusted to the first target voltage value.

10. The driving method according to claim 1, characterized in that: The effective display phase includes a data writing phase and a light emitting phase; In the blanking phase before the effective display phase of the next frame, after adjusting the voltage value of the power supply voltage signal to the first target voltage value, the method further includes: In the data writing phase, detecting whether the voltage value of the power supply voltage signal is equal to the first target voltage value, and / or detecting whether the voltage value of the data signal is equal to the second target voltage value; When the voltage value of the power supply voltage signal is not equal to the first target voltage value, adjusting the voltage value of the power supply voltage signal to the first target voltage value; When the voltage value of the data signal is not equal to the second target voltage value, the voltage value of the data signal is adjusted to the second target voltage value.

11. An electronic device, characterized in that: The electronic device comprises: a processor, a memory, and a computer program stored in the memory and executable on the processor, wherein the computer program implements the steps of the method for driving a display panel according to any one of claims 1 to 10 when executed by the processor.

12. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the method for driving a display panel according to any one of claims 1 to 10 are implemented.

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