Display panel driving method, device and equipment

Abstract

The present application discloses a driving method, device and equipment for a display panel, belonging to the field of display technology. The driving method includes: when the display brightness of the display panel is switched from a first brightness level to a second brightness level, adjusting the voltage value of an initialization voltage signal so that the voltage value of the initialization voltage signal becomes a first voltage value, which is synchronized with the voltage value of a power supply voltage signal becoming a second voltage value. The first voltage value is the voltage value of the initialization voltage signal of the display panel at the second brightness level; the second voltage value is the voltage value of the power supply voltage signal of the display panel at the second brightness level, so that after the display panel switches the brightness level, the flicker problem of the display panel caused by switching the brightness level is improved, thereby improving the display effect.

Description

Technical Field

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

[0002] Organic light-emitting diodes (OLEDs) and flat-panel displays based on LED technologies have become mainstream in consumer electronics, including mobile phones, televisions, laptops, and desktop computers, due to their advantages of high image quality, power efficiency, thinness, and wide application range. However, the display performance of current OLED display products needs to be improved. Summary of the Invention

[0003] Embodiments of the present application provide a display panel driving method, apparatus, device, medium, and product, which can improve flickering of the display panel and enhance the display effect when the display panel switches brightness levels.

[0004] In a first aspect, an embodiment of the present application provides a method for driving a display panel, comprising:

[0005] When the display brightness of the display panel is switched from a first brightness level to a second brightness level, the voltage value of the initialization voltage signal is adjusted so that the voltage value of the initialization voltage signal becomes a first voltage value, which is synchronized with the voltage value of the power supply voltage signal becoming a second voltage value. The first voltage value is the voltage value of the initialization voltage signal of the display panel at the second brightness level; the second voltage value is the voltage value of the power supply voltage signal of the display panel at the second brightness level.

[0006] According to any embodiment of the first aspect of the present application, the number of pulses of the light emitting control signal received by the display panel during a frame refresh period at the first brightness level is different from the number of pulses of the light emitting control signal received by the display panel during a frame refresh period at the second brightness level;

[0007] And / or, the start time of the process in which the voltage value of the initialization voltage signal gradually changes from the third voltage value to the first voltage value is before the start time of the process in which the voltage value of the power supply voltage signal gradually changes from the fourth voltage value to the second voltage value; the third voltage value is the voltage value of the initialization voltage signal of the display panel at the first brightness level; and the fourth voltage value is the voltage value of the power supply voltage signal of the display panel at the first brightness level;

[0008] and / or, at the start of a process in which the voltage value of the initialization voltage signal gradually changes from the third voltage value to the first voltage value, sending a control instruction to the power supply chip, so that the power supply chip adjusts the voltage value of the power supply voltage signal to the second voltage value based on the control instruction;

[0009] And / or, the end time of completing sending the control instruction is before the start time of the process in which the voltage value of the power supply voltage signal gradually changes from the fourth voltage value to the second voltage value;

[0010] And / or, the end time of the process in which the voltage value of the initialization voltage signal gradually changes from the third voltage value to the first voltage value is synchronized with the end time of the process in which the voltage value of the power supply voltage signal gradually changes from the fourth voltage value to the second voltage value;

[0011] and / or, the display panel is in a DC dimming mode when at one of the first brightness level and the second brightness level, and is in a pulse width dimming mode when at the other of the first brightness level and the second brightness level;

[0012] And / or, the first brightness level is greater than the second brightness level, the display panel is in DC dimming mode in the first brightness level range, the display panel is in pulse width dimming mode in the second brightness level range, one or more brightness levels in the first brightness level range is greater than or equal to the first brightness level, and one or more brightness levels in the second brightness level range is less than or equal to the second brightness level.

[0013] According to any of the aforementioned embodiments of the first aspect of the present application, adjusting the voltage value of the initialization voltage signal includes:

[0014] Superimposing the original initialization voltage signal and the preset signal to obtain an adjusted voltage value of the initialization voltage signal;

[0015] According to any of the aforementioned embodiments of the first aspect of the present application, the preset signal is a preset pulse signal.

[0016] According to any of the aforementioned embodiments of the first aspect of the present application, the width of the preset pulse signal is smaller than the first time period, and the first time period is from the start moment of the process in which the voltage value of the initialization voltage signal gradually changes from the third voltage value to the first voltage value to the end moment of the process in which the voltage value of the power supply voltage signal gradually changes from the fourth voltage value to the second voltage value; the third voltage value is the voltage value of the initialization voltage signal of the display panel at the first brightness level; and the fourth voltage value is the voltage value of the power supply voltage signal of the display panel at the first brightness level.

[0017] and / or, the width of the preset pulse signal is greater than a third time period, and the third time period is from the start time to the end time of a process in which the voltage value of the original initialization voltage signal gradually changes from the third voltage value to the first voltage value when no preset signal is set;

[0018] And / or, the width of the preset pulse signal is greater than a fourth time period, and the fourth time period is from the start time of the process in which the voltage value of the original initialization voltage signal gradually changes from the third voltage value to the first voltage value to the start time of the process in which the voltage value of the power supply voltage signal gradually changes from the fourth voltage value to the second voltage value;

[0019] And / or, the start time of the preset pulse signal is synchronized with the start time of the process in which the original initialization voltage signal gradually changes from the third voltage value to the first voltage value;

[0020] And / or, the end time of the preset pulse signal is later than the end time of the process in which the original initialization voltage signal gradually changes from the third voltage value to the first voltage value;

[0021] And / or, the end time of the preset pulse signal is later than the start time of the process in which the voltage value of the power supply voltage signal gradually changes from the fourth voltage value to the second voltage value.

[0022] According to any of the aforementioned embodiments of the first aspect of the present application, when the first voltage value is less than the third voltage value, the amplitude of the preset pulse signal is positive;

[0023] and / or, when the first voltage value is greater than the third voltage value, the amplitude of the preset pulse signal is negative;

[0024] And / or, the absolute value of the amplitude of the preset pulse signal is smaller than the absolute value of the difference between the third voltage value and the first voltage value.

[0025] According to any of the aforementioned embodiments of the first aspect of the present application, the display panel includes a pixel circuit and a light-emitting device, the pixel circuit is electrically connected to the first pole of the light-emitting device, the second pole of the light-emitting device is connected to the power supply voltage signal, the pixel circuit includes a first initialization module, the first end of the first initialization module is connected to the initialization voltage signal, and the second end of the first initialization module is electrically connected to the second pole of the light-emitting device.

[0026] According to any of the aforementioned embodiments of the first aspect of the present application, the pixel circuit includes a driving module and a second initialization module, and the second initialization module is electrically connected to the first end or the second end of the driving module.

[0027] According to any of the aforementioned implementations of the first aspect of the present application, the control end of the first initialization module is electrically connected to the control end of the second initialization module.

[0028] According to any of the aforementioned embodiments of the first aspect of the present application, the first initialization module and the second initialization module are electrically connected to different initialization signal lines.

[0029] According to any of the aforementioned embodiments of the first aspect of the present application, the pixel circuit further includes a third initialization module, and the third initialization module is electrically connected to the control end or the second end of the driving module.

[0030] According to any of the aforementioned embodiments of the first aspect of the present application, the first initialization module and the third initialization module are electrically connected to different initialization signal lines.

[0031] According to any of the aforementioned embodiments of the first aspect of the present application, the second initialization module and the third initialization module are electrically connected to different initialization signal lines.

[0032] According to any of the aforementioned embodiments of the first aspect of the present application, the pixel circuit also includes a data writing module and / or a threshold compensation module, the data writing module is connected between the data line and the first end of the driving module, and the threshold compensation module is connected between the second end of the driving module and the control end.

[0033] According to any of the aforementioned embodiments of the first aspect of the present application, the third initialization module includes a metal oxide transistor; and the threshold compensation module includes a metal oxide transistor.

[0034] According to any of the aforementioned embodiments of the first aspect of the present application, the pixel circuit also includes a first light-emitting control module and / or a second light-emitting control module, the first light-emitting control module and / or the second light-emitting control module are connected in series with the driving module between the first power supply terminal and the first pole of the light-emitting device, and the control end of the first light-emitting control module and / or the control end of the second light-emitting control module are connected to the light-emitting control signal; the first light-emitting control module is connected between the first power supply terminal and the first end of the driving module, and the second light-emitting control module is connected between the second end of the driving module and the first pole of the light-emitting device.

[0035] According to any of the aforementioned embodiments of the first aspect of the present application, the pixel circuit further includes a storage module, which is connected between the first power supply terminal and the control terminal of the driving module.

[0036] According to any of the foregoing embodiments of the first aspect of the present application, the amplitude of the preset pulse signal is a target adjustment voltage value, and before the original initialization voltage signal and the preset signal are superimposed to obtain the adjusted voltage value of the initialization voltage signal, the driving method further includes:

[0037] Calculating an absolute value of a difference between the third voltage value and the first voltage value to obtain a current target absolute value difference;

[0038] Based on the corresponding relationship between the preset absolute value difference and the amplitude of the preset pulse signal, a target adjustment voltage value corresponding to the target absolute value difference is determined, and the preset pulse signal is determined.

[0039] In a second aspect, an embodiment of the present application provides a driving device for a display panel, comprising:

[0040] The adjustment module is configured to adjust the voltage value of the initialization voltage signal when the display brightness of the display panel is switched from a first brightness level to a second brightness level, so that the voltage value of the initialization voltage signal becomes a first voltage value, synchronized with the voltage value of the power supply voltage signal changing to a second voltage value, wherein the first voltage value is the voltage value of the initialization voltage signal of the display panel at the second brightness level; and the second voltage value is the voltage value of the power supply voltage signal of the display panel at the second brightness level. According to any embodiment of the second aspect of the present application, the driving device further includes:

[0041] Display driver chip, used to output the original initialization voltage signal;

[0042] The power chip is used to receive control instructions sent by the display driver chip and output power voltage signals;

[0043] The number of pulses of the light emitting control signal received by the display panel during a frame refresh period at the first brightness level is different from the number of pulses of the light emitting control signal received by the display panel during a frame refresh period at the second brightness level;

[0044] And / or, the start time of the process in which the voltage value of the initialization voltage signal gradually changes from the third voltage value to the first voltage value is before the start time of the process in which the voltage value of the power supply voltage signal gradually changes from the fourth voltage value to the second voltage value; the third voltage value is the voltage value of the initialization voltage signal of the display panel at the first brightness level; and the fourth voltage value is the voltage value of the power supply voltage signal of the display panel at the first brightness level;

[0045] and / or, at the start of a process in which the voltage value of the initialization voltage signal gradually changes from the third voltage value to the first voltage value, the display driver chip sends a control instruction to the power supply chip, so that the power supply chip adjusts the voltage value of the power supply voltage signal to the second voltage value based on the control instruction;

[0046] And / or, the display driver chip finishes sending the control instruction before the start time of the process in which the voltage value of the power supply voltage signal gradually changes from the fourth voltage value to the second voltage value;

[0047] And / or, the end time of the process in which the voltage value of the initialization voltage signal gradually changes from the third voltage value to the first voltage value is synchronized with the end time of the process in which the voltage value of the power supply voltage signal gradually changes from the fourth voltage value to the second voltage value;

[0048] and / or, the display panel is in a DC dimming mode when at one of the first brightness level and the second brightness level, and is in a pulse width dimming mode when at the other of the first brightness level and the second brightness level;

[0049] And / or, the first brightness level is greater than the second brightness level, the display panel is in DC dimming mode in the first brightness level range, the display panel is in pulse width dimming mode in the second brightness level range, one or more brightness levels in the first brightness level range is greater than or equal to the first brightness level, and one or more brightness levels in the second brightness level range is less than or equal to the second brightness level.

[0050] According to any of the aforementioned embodiments of the second aspect of the present application, the driving device further includes:

[0051] Display driver chip, used to output the original initialization voltage signal;

[0052] The adjustment module includes a superposition module;

[0053] The superposition module is used to superpose the original initialization voltage signal with the preset signal to obtain the voltage value of the adjusted initialization voltage signal.

[0054] According to any of the aforementioned embodiments of the second aspect of the present application, the preset signal is a preset pulse signal.

[0055] According to any of the aforementioned embodiments of the second aspect of the present application, the width of the preset pulse signal is smaller than the first time period, and the first time period is from the start time of the process in which the voltage value of the initialization voltage signal gradually changes from the third voltage value to the first voltage value to the end time of the process in which the voltage value of the power supply voltage signal gradually changes from the fourth voltage value to the second voltage value; the third voltage value is the voltage value of the initialization voltage signal of the display panel at the first brightness level; and the fourth voltage value is the voltage value of the power supply voltage signal of the display panel at the first brightness level;

[0056] and / or, the width of the preset pulse signal is greater than a third time period, and the third time period is from the start time to the end time of a process in which the voltage value of the original initialization voltage signal gradually changes from the third voltage value to the first voltage value when no preset signal is set;

[0057] And / or, the width of the preset pulse signal is greater than a fourth time period, and the fourth time period is the starting moment of the process in which the voltage value of the original initialization voltage signal gradually changes from the third voltage value to the first voltage value to the starting moment of the process in which the voltage value of the power supply voltage signal gradually changes from the fourth voltage value to the second voltage value.

[0058] According to any of the aforementioned embodiments of the second aspect of the present application, when the first voltage value is less than the third voltage value, the amplitude of the preset pulse signal is positive;

[0059] and / or, when the first voltage value is greater than the third voltage value, the amplitude of the preset pulse signal is negative;

[0060] And / or, the absolute value of the amplitude of the preset pulse signal is smaller than the absolute value of the difference between the third voltage value and the first voltage value.

[0061] According to any of the aforementioned embodiments of the second aspect of the present application, the driving device further includes a pulse generating circuit for outputting a preset pulse signal.

[0062] According to any of the aforementioned embodiments of the second aspect of the present application, the superposition module and / or the pulse generating circuit are integrated into the display driver chip.

[0063] According to any of the aforementioned embodiments of the second aspect of the present application, the display panel includes a pixel circuit and a light-emitting device, the pixel circuit is electrically connected to the first pole of the light-emitting device, and the second pole of the light-emitting device is connected to the power supply voltage signal, the pixel circuit includes a first initialization module, the first end of the first initialization module is connected to the initialization voltage signal, and the second end of the first initialization module is electrically connected to the second pole of the light-emitting device.

[0064] According to any of the aforementioned embodiments of the second aspect of the present application, the pixel circuit includes a driving module and a second initialization module, and the second initialization module is electrically connected to the first end or the second end of the driving module.

[0065] According to any of the aforementioned implementations of the second aspect of the present application, the control end of the first initialization module is electrically connected to the control end of the second initialization module.

[0066] According to any of the aforementioned embodiments of the second aspect of the present application, the pixel circuit further includes a third initialization module, and the third initialization module is electrically connected to the control end or the second end of the driving module.

[0067] According to any of the aforementioned embodiments of the second aspect of the present application, the pixel circuit also includes a data writing module and / or a threshold compensation module, the data writing module is connected between the data line and the first end of the driving module, and the threshold compensation module is connected between the second end of the driving module and the control end.

[0068] According to any of the aforementioned embodiments of the second aspect of the present application, the third initialization module includes a metal oxide transistor; and the threshold compensation module includes a metal oxide transistor.

[0069] According to any of the aforementioned embodiments of the second aspect of the present application, the pixel circuit further includes a first light-emitting control module and / or a second light-emitting control module, wherein the first light-emitting control module and / or the second light-emitting control module are connected in series with the driving module and between the first power supply terminal and the first electrode of the light-emitting device;

[0070] The control end of the first light-emitting control module and / or the control end of the second light-emitting control module are connected to the light-emitting control signal; the first light-emitting control module is connected between the first power supply end and the first end of the driving module, and the second light-emitting control module is connected between the second end of the driving module and the first pole of the light-emitting device.

[0071] According to any of the aforementioned embodiments of the second aspect of the present application, the pixel circuit further includes a storage module, which is connected between the first power supply terminal and the control terminal of the driving module.

[0072] According to any of the aforementioned embodiments of the second aspect of the present application, the voltage amplitude of the preset pulse signal is a target adjustment voltage value, and the display driver chip is further used to:

[0073] Calculating an absolute value of a difference between the third voltage value and the first voltage value to obtain a current target absolute value difference;

[0074] Based on the correspondence between the preset absolute value difference and the amplitude of the preset pulse signal, a target adjustment voltage value corresponding to the target absolute value difference is determined, and a preset pulse signal including the target adjustment voltage value is determined.

[0075] In a third aspect, an embodiment of the present application provides a display device, comprising:

[0076] a processor and a memory storing computer program instructions;

[0077] When the processor executes the computer program instructions, it is used to perform the display panel driving method of the first aspect.

[0078] In a fourth aspect, an embodiment of the present application provides a computer storage medium having computer program instructions stored thereon. When the computer program instructions are executed by a processor, the method for driving the display panel of the first aspect described above is implemented.

[0079] In a fifth aspect, an embodiment of the present application provides a computer program product, including a computer program, which, when processed by a processor, implements the display panel driving method of the first aspect mentioned above.

[0080] The driving method, device, equipment, medium and product of the display panel provided in the embodiments of the present application can improve the display effect of the display panel by adjusting the voltage value of the initialization voltage signal to a first voltage value when the display brightness of the display panel is switched from a first brightness level to a second brightness level, and synchronizing the voltage value of the power supply voltage signal to a second voltage value, thereby avoiding the flicker problem that may be caused by the voltage value of the initialization voltage signal being changed to the first voltage value and the voltage value of the power supply voltage signal being changed to the second voltage value being out of sync. BRIEF DESCRIPTION OF THE DRAWINGS

[0081] In order to more clearly illustrate the technical solutions 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.

[0082] Figure 1 An exemplary pixel circuit schematic diagram provided for some embodiments of the present application.

[0083] Figure 2 An exemplary signal timing diagram is provided for some embodiments of the present application.

[0084] Figure 3 A schematic flow chart of a method for driving a display panel provided in some embodiments of the present application.

[0085] Figure 4 Another exemplary signal timing diagram provided for some embodiments of the present application.

[0086] Figure 5 Another exemplary signal timing diagram is provided for some embodiments of the present application.

[0087] Figure 6 Another exemplary pixel circuit schematic diagram provided for some embodiments of the present application.

[0088] Figure 7 A schematic diagram of a driving device for a display panel provided in some embodiments of the present application.

[0089] Figure 8 Another exemplary schematic diagram of a driving device provided for some embodiments of the present application.

[0090] Figure 9 A schematic diagram of the hardware structure of a display device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0091] 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 merely to provide a better understanding of the present application by illustrating the examples of the present application.

[0092] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

[0093] Before describing the technical solutions provided by the embodiments of the present application, in order to facilitate understanding of the embodiments of the present application, the present application first specifically describes the problems existing in the related art:

[0094] Organic Light-Emitting Diode (OLED) display panels made with LTPO technology are widely used in different user devices. Currently, popular LTPO products mostly use 7T1C or 8T1C pixel circuits, such as Figure 1 , is an exemplary 8T1C pixel circuit.

[0095] like Figure 1 In the pixel circuit, point A is connected to the anode of the OLED. When T7 is turned on, the initialization voltage signal Vrefn2 transmitted by the initialization voltage signal line can be transmitted to point A to reset the anode of the OLED, and the power supply voltage signal line can output the power supply voltage signal ELVSS to the cathode of the OLED.

[0096] It can be imagined that when a user uses a user device, the display brightness of the display panel may be switched. When the display driver IC (DDIC) of the display panel receives a switching instruction to switch the display brightness level, the DDIC adjusts the voltage value of the initialization voltage signal. At the same time, the DDIC sends a control signal (SWIRE) to the power management IC (PMIC) to adjust the voltage value of the power supply voltage signal through the PMIC. Figure 2 As shown, Figure 2 FIG. 1 is a timing diagram of the voltage changes of the SWIRE signal, the initialization voltage signal Vrefn2 and the power supply voltage signal ELVSS when an exemplary display panel switches the display brightness level. Figure 2 It can be seen that when DDIC receives the switching instruction at time a, it adjusts the voltage value of the initialization voltage signal Vrefn2, sends a SWIRE signal to PMIC at time a, and the initialization voltage signal Vrefn2 completes the voltage value adjustment at time b. PMIC starts switching the voltage value of the power supply voltage signal ELVSS at time c, and the voltage value of the power supply voltage signal ELVSS completes the adjustment at time d.

[0097] Since the initialization voltage signal Vrefn2 and the power supply voltage signal ELVSS need to be switched synchronously when switching the display brightness value (DBV), the initialization voltage signal Vrefn2 can take effect directly, but the instruction for the power supply voltage signal ELVSS to take effect is converted from SWIRE, and the time is delayed. Therefore, there is a problem that the initialization voltage signal Vrefn2 and the power supply voltage signal ELVSS take effect at inconsistent times, and the voltage difference between the two voltages changes during the switching process, resulting in flickering when switching DBV.

[0098] Since the voltage values ​​of the initialization voltage signal and the power supply voltage signal are adjusted asynchronously, the display panel flickers. The flickering is particularly noticeable at the brightness boundary where the display panel switches to a dimming mode due to switching display brightness.

[0099] Based on this, the embodiments of the present application provide a display panel driving method, device, equipment, medium and product, which can solve the above problems. Below, a display panel driving method provided by the embodiments of the present application is described in detail.

[0100] In some embodiments, as Figure 3 As shown, the embodiment of the present application provides a method for driving a display panel, including step S310:

[0101] S310: When the display brightness of the display panel is switched from a first brightness level to a second brightness level, the voltage value of the initialization voltage signal is adjusted so that the voltage value of the initialization voltage signal becomes a first voltage value, which is synchronized with the voltage value of the power supply voltage signal becoming a second voltage value. The first voltage value is the voltage value of the initialization voltage signal of the display panel at the second brightness level; the second voltage value is the voltage value of the power supply voltage signal of the display panel at the second brightness level.

[0102] During the process of a user using a user device including a display panel, the display panel may receive a switching instruction input by the user to switch the brightness level of the display panel, for example, receiving a switching instruction to switch the display brightness of the display panel from a first brightness level to a second brightness level. Here, the dimming mode of the first brightness level may be a first dimming mode, and the dimming mode of the second brightness level may be a second dimming mode. In addition, within one screen refresh cycle, the number of pulses of the light control signal received by the display panel in the first dimming mode and the display panel in the second dimming mode may be different. For example, the first dimming mode is a direct current dimming (DC) dimming mode, and the second dimming mode is a pulse width modulation (PWM) dimming mode; or, the first dimming mode is a pulse width PWM dimming mode, and the second dimming mode is a direct current (DC) dimming mode. In one screen refresh cycle, the number of pulses (pulses) of the DC dimming mode may be 3 pulses, and the number of pulses of the PWM dimming mode may be 1 pulse.

[0103] In some implementations, the first brightness level and the second brightness level are in a pulse width modulation dimming (PWM) mode.

[0104] The first brightness level is different from the second brightness level. For example, the first brightness level is greater than the second brightness level, and the number of pulses of the light control signal received by the display panel in the first dimming mode within one picture refresh cycle is smaller than the number of pulses of the light control signal received by the display panel in the second dimming mode within one picture refresh cycle.

[0105] In some examples, the rates at which the voltage values ​​of the initialization voltage signal and the power supply voltage signal change can be changed so that the voltage value of the initialization voltage signal changes to a first voltage value in synchronization with the voltage value of the power supply voltage signal changing to a second voltage value.

[0106] In some examples, the amount of change in the voltage value of the initialization voltage signal or the power supply voltage signal can be adjusted so that the voltage value of the initialization voltage signal becomes a first voltage value, which is synchronized with the voltage value of the power supply voltage signal changing to a second voltage value. For example, when a switching instruction is received to switch the brightness of the display panel from a first brightness level to a second brightness level, the voltage value of the initialization voltage signal can be adjusted to the first voltage value. The initialization voltage signal can be first adjusted from the voltage value of the initialization voltage signal of the first brightness to a target voltage value, and then the voltage value of the initialization voltage signal can be adjusted from the target voltage value to the first voltage value. In this way, the time when the voltage values ​​of the initialization voltage signal and the power supply voltage signal are adjusted to the first voltage value and the second voltage value, respectively, is synchronized.

[0107] The embodiment of the present application adjusts the voltage value of the initialization voltage signal when the display brightness of the display panel is switched from the first brightness level to the second brightness level, so that the voltage value of the initialization voltage signal becomes the first voltage value, and is synchronized with the voltage value of the power supply voltage signal becoming the second voltage value, thereby achieving synchronous adjustment of the voltage value of the initialization voltage signal and the voltage value of the power supply voltage signal to the first voltage value and the second voltage value, overcoming the flickering problem of the display panel when switching the display brightness in the prior art, and being able to improve the display effect of the display panel.

[0108] In some embodiments, the number of pulses of the light-emitting control signal received by the display panel during a frame refresh cycle at a first brightness level may be different from the number of pulses of the light-emitting control signal EM received by the display panel during a frame refresh cycle at a second brightness level. The first brightness level may be greater than the second brightness level. The display panel is in a direct current dimming (DC) dimming mode when the brightness level is greater than or equal to the first brightness level, and is in a pulse width modulation (PWM) dimming mode when the brightness level is less than or equal to the second brightness level. For example, the first dimming mode is a DC dimming mode, and the second dimming mode is a pulse width dimming mode; or, the first dimming mode is a pulse width PWM dimming mode, and the second dimming mode is a DC dimming mode. In one frame refresh cycle, the number of pulses in the DC dimming mode may be 3 pulses, and the number of pulses in the PWM dimming mode may be 1 pulse.

[0109] For example, the first brightness level is greater than the second brightness level, the display panel is in DC dimming mode in the first brightness level range, and in pulse width dimming mode in the second brightness level range, one or more brightness levels in the first brightness level range is greater than or equal to the first brightness level, and one or more brightness levels in the second brightness level range is less than or equal to the second brightness level. For example, the first brightness level and the second brightness level are inflection points.

[0110] In some examples, such as Figure 4 As shown, Figure 4 FIG. 1 is a timing diagram of an exemplary SWIRE signal, an initialization voltage signal, and a power supply voltage signal.

[0111] like Figure 4 As shown, the time period t1 is the time period during which the adjusted initialization voltage signal Vrefn2 gradually changes from the initial third voltage value V3 to the first voltage value V1. The starting time a1 of the time period t1 is the starting time when the adjusted initialization voltage signal Vrefn2 gradually changes from the initial third voltage value V3 to the first voltage value V1. The ending time a2 of the time period t1 is the ending time when the adjusted initialization voltage signal Vrefn2 gradually changes from the initial third voltage value V3 to the first voltage value V1.

[0112] The time period t2 is the time period in which the power supply voltage signal gradually changes from the fourth voltage value V4 to the second voltage value V2. The starting time a3 of the time period t2 is the starting time when the power supply voltage signal gradually changes from the fourth voltage value V4 to the second voltage value V2. The ending time a2 of the time period t2 is the ending time when the power supply voltage signal gradually changes from the initial fourth voltage value V4 to the second voltage value V2. The starting time of the above-mentioned first time period t1 is earlier than the starting time of the second time period t2. It can be imagined that the ending time when the above-mentioned adjusted initialization voltage signal Vrefn2 gradually changes from the third voltage value V3 to the first voltage value V1 is also a2, that is, the ending time of the process in which the voltage value of the adjusted initialization voltage signal Vrefn2 gradually changes from the third voltage value to the first voltage value is synchronized with the ending time of the process in which the voltage value of the power supply voltage signal gradually changes from the fourth voltage value to the second voltage value.

[0113] And, as Figure 4 The starting time a1 of the process in which the voltage value of the initialization voltage signal gradually changes from the third voltage value V3 to the first voltage value V1 is before the starting time a3 of the process in which the voltage value of the power supply voltage signal gradually changes from the fourth voltage value V4 to the second voltage value V2; the third voltage value is the voltage value of the initialization voltage signal of the display panel at the first brightness level; and the fourth voltage value is the voltage value of the power supply voltage signal of the display panel at the first brightness level.

[0114] In some examples, such as Figure 4 As shown, at the start time a1 of the process in which the voltage value of the adjusted initialization voltage signal gradually changes from the third voltage value V3 to the first voltage value V1 during the time period t1, the driver chip DDIC can send a control instruction such as a SWIRE signal to the power chip 703, such as the PMIC, so that the power chip adjusts the voltage value of the power voltage signal to the second voltage value based on the control instruction;

[0115] like Figure 4 , the end time of completing the sending of the control instruction is before the start time a3 of the process in which the voltage value of the power supply voltage signal gradually changes from the fourth voltage value to the second voltage value;

[0116] The end time d1 of the process in which the voltage value of the initialization voltage signal gradually changes from the third voltage value to the first voltage value is synchronized with the end time in which the voltage value of the power supply voltage signal gradually changes from the fourth voltage value to the second voltage value.

[0117] By setting the above-mentioned timing relationship, the embodiment of the present application can synchronize the end moment when the initialization voltage signal changes from the third voltage value to the first voltage value with the end moment when the power supply voltage signal changes from the fourth voltage value to the second voltage value, thereby overcoming the flickering problem of the display panel when switching the display brightness in the prior art and improving the display effect of the display panel.

[0118] In some examples, the switching time of the initialization voltage signal can be delayed. For example, in response to a brightness level switching instruction (a switching instruction to switch the display brightness of the display panel from a first brightness level to a second brightness level), after a preset delay, the voltage value of the initialization voltage signal is gradually changed from a third voltage value to a first voltage value, so that the voltage value of the initialization voltage signal becomes the first voltage value, which is synchronized with the voltage value of the power supply voltage signal becoming the second voltage value.

[0119] The preset signal can be superimposed on the initialization voltage signal to enhance the display effect.

[0120] In some embodiments, adjusting the voltage value of the initialization voltage signal includes:

[0121] The original initialization voltage signal is superimposed on the preset signal to obtain the voltage value of the adjusted initialization voltage signal.

[0122] In some embodiments, as Figure 5 As shown, the preset signal can be a preset pulse signal. By superimposing the pulse signal with the initialization voltage signal, the voltage value of the initialization voltage signal is changed, for example, Figure 5By superimposing the preset pulse signal on the original initialization voltage signal Vrefn2', the time it takes for the initialization voltage signal to gradually change from the third voltage value V3 to the first voltage value V1 is prolonged. By superimposing the preset signal on the original initialization voltage signal Vrefn2' to adjust the voltage value of the initialization voltage signal, the accuracy of the adjusted voltage value of the initialization voltage signal Vrefn2 can be improved.

[0123] For example, the start time of the preset pulse signal is synchronized with the start time a1 of the process in which the original initialization voltage signal Vrefn2 ′ gradually changes from the third voltage value to the first voltage value.

[0124] For example, the end time of the preset pulse signal is later than the end time a4 of the process in which the original initialization voltage signal Vrefn2 ′ gradually changes from the third voltage value to the first voltage value.

[0125] For example, the end time of the preset pulse signal is later than the start time a3 of the process in which the voltage value of the power supply voltage signal gradually changes from the fourth voltage value V4 to the second voltage value V2.

[0126] A reverse pulse is added when the initialization voltage signal is switched to delay the effective time of the initialization voltage signal. Therefore, the initialization voltage signal and the power supply voltage signal can be switched simultaneously, the voltage difference can be kept stable, and the switching DBV flickering phenomenon can be improved.

[0127] In some embodiments, as Figure 5 As shown, the width of the preset pulse signal is less than the first time period t1. The first time period is the starting moment a1 of the process in which the voltage value of the initialization voltage signal Vrefn2 gradually changes from the third voltage value to the first voltage value, and the ending moment a2 of the process in which the voltage value of the power supply voltage signal gradually changes from the fourth voltage value to the second voltage value. The third voltage value is the voltage value of the initialization voltage signal Vrefn2 of the display panel at the first brightness level. The fourth voltage value is the voltage value of the power supply voltage signal of the display panel at the first brightness level. The first time period is equivalent to Figure 2 The first time period t1 may be equal to Figure 2 From time a1 to time d1 in .

[0128] In some embodiments, as Figure 5 As shown, the width of the preset pulse signal is greater than the third time period t3, and the third time period is the starting time a1 to the ending time a4 of the process in which the voltage value of the original initialization voltage signal Vrefn2' gradually changes from the third voltage value to the first voltage value. The third time period t3 can be equal to Figure 2 From time a to time b in .

[0129] In some embodiments, as Figure 5 As shown, the width of the preset pulse signal is greater than the fourth time period t4. The fourth time period is the starting time a1 of the process in which the voltage value of the original initialization voltage signal Vrefn2' gradually changes from the third voltage value V3 to the first voltage value V1, and the starting time a3 of the process in which the voltage value of the power supply voltage signal gradually changes from the fourth voltage value V4 to the second voltage value V2. The second time period is equivalent to Figure 2 From time a to time c in .

[0130] The embodiment of the present application obtains the voltage value of the adjusted initialization voltage signal Vrefn2 by setting a preset signal (for example, a preset pulse signal) to be superimposed on the original initialization voltage signal Vrefn2', and sets the width of the preset pulse signal to be less than the first time period t1, greater than the third time period t3, and greater than the fourth time period t4. This can improve the accuracy of adjusting the voltage value of the initialization voltage signal based on the above-mentioned preset pulse signal, so that the end time when the initialization voltage signal changes from the third voltage value to the first voltage value is synchronized with the end time when the power supply voltage signal changes from the fourth voltage value to the second voltage value.

[0131] In some embodiments, the preset pulse signal may include different amplitudes, which are related to the magnitude of the first voltage value V1 and the third voltage value V3. When the first voltage value V1 is less than the third voltage value V3, the amplitude of the preset pulse signal is positive; when the first voltage value V1 is greater than the third voltage value V3, the amplitude of the preset pulse signal is negative. By determining the amplitude of the preset pulse signal based on the magnitude relationship between the first voltage value V1 and the third voltage value V3, the accuracy of adjusting the voltage value of the initialization voltage signal based on the preset pulse signal is further improved, so that the end time of the initialization voltage signal changing from the third voltage value V3 to the first voltage value V1 is synchronized with the end time of the power supply voltage signal changing from the fourth voltage value to the second voltage value. This is equivalent to superimposing the original initialization voltage signal Vrefn2' with the reverse preset pulse signal to obtain the adjusted voltage value of the initialization voltage signal Vrefn2. The switching time of the initialization voltage signal Vrefn2 is slowed down by the reverse pulse voltage, so that the voltage difference between the initialization voltage signal Vrefn2 and the power supply voltage signal ELVSS remains stable, the DBV switching is stabilized, especially the voltage difference between the initialization voltage signal Vrefn2 and the power supply voltage signal ELVSS before and after the inflection point switching, the brightness change before and after the DBV switching is stabilized, and the flicker of DBV and inflection point switching is optimized. The display brightness value (DBV) can also be called the display brightness level. Display devices such as mobile phones and computers usually include a brightness adjustment button, and the user uses the brightness adjustment button to change the input display brightness level. Under different DBVs, the brightness corresponding to the same grayscale is different. For example, the larger the DBV, the greater the brightness corresponding to the maximum grayscale.

[0132] In some embodiments, the absolute value of the amplitude of the preset pulse signal is smaller than the absolute value of the difference between the third voltage value and the first voltage value.

[0133] The absolute value of the amplitude V of the preset pulse signal, the third voltage value, and the first voltage value satisfy the following expression:

[0134] |V|<|V3-V1| (1)

[0135] v is the amplitude of the preset pulse signal, V3 is the third voltage value, and V1 is the first voltage value.

[0136] Here, the absolute value of the amplitude of the preset pulse signal is set to be smaller than the absolute value of the difference between the third voltage value and the first voltage value. By limiting the absolute value of the amplitude of the preset pulse signal, the display brightness of the display panel when switching the display mode can be stabilized and the display effect can be improved.

[0137] In some examples, such as Figure 6 As shown, the embodiment of the present application provides a schematic diagram of an exemplary display panel, as shown in FIG. Figure 6 The display panel includes a pixel circuit 600 and a light-emitting device 601.

[0138] The pixel circuit 601 is electrically connected to a first electrode (e.g., an anode) of the light-emitting device 601, and a second electrode (e.g., a cathode) of the light-emitting device 601 is connected to a power supply voltage signal ELVSS. For example, one of the first electrode and the second electrode of the light-emitting device 601 is an anode, and the other is a cathode.

[0139] The pixel circuit includes a first initialization module 603. The first terminal of the first initialization module 603 receives the initialization voltage signal Vrefn2, and the second terminal of the first initialization module 603 is electrically connected to the first terminal of the light-emitting device 601. The output terminal of the superposition module 602 can be electrically connected to the first terminal of the first initialization module 603. For example, the first initialization module 603 is connected between the first initialization signal line (for transmitting the initialization signal Vrefn2) and the first terminal of the light-emitting device 601. The first initialization module 603 may include a P-type transistor or an N-type transistor.

[0140] The pixel circuit includes a driver module 604 and a second initialization module 605. The second initialization module 605 is electrically connected to the first terminal or the second terminal of the driver module 604. The control terminal of the first initialization module 603 is electrically connected to the control terminal of the second initialization module 605. For example, the first initialization module and the second initialization module are electrically connected to different initialization signal lines. For example, the second initialization module 605 is connected between the second initialization signal line (for transmitting the initialization signal Vrefp) and the first terminal or the second terminal of the driver module 604. The driver module 604 may include a P-type transistor or an N-type transistor. The second initialization module 605 may include a P-type transistor or an N-type transistor.

[0141] The pixel circuit further includes a third initialization module 606, which is electrically connected to the control terminal or the second terminal of the driver module 604. For example, the first initialization module and the third initialization module are electrically connected to different initialization signal lines. For example, the second initialization module and the third initialization module are electrically connected to different initialization signal lines. For example, the third initialization module 606 is connected between the third initialization signal line (for transmitting the initialization signal Vrefn1) and the control terminal or the second terminal of the driver module 604. The third initialization module 606 may include a P-type transistor or an N-type transistor.

[0142] The pixel circuit further includes a data writing module 607 and / or a threshold compensation module 608. The data writing module 607 is connected between the data line and the first terminal of the driving module 604, and the threshold compensation module 608 is connected between the second terminal of the driving module 604 and the control terminal. The data writing module 607 may include a P-type transistor or an N-type transistor. The threshold compensation module 608 may include a P-type transistor or an N-type transistor.

[0143] For example, the third initialization module 606 includes a metal oxide transistor.

[0144] For example, the threshold compensation module 608 includes a metal oxide transistor.

[0145] The pixel circuit further includes a first light-emitting control module 609 and / or a second light-emitting control module 610. The first light-emitting control module 609 and / or the second light-emitting control module 610 are connected in series with the driver module 604 between a first power supply terminal (connected to a power supply voltage ELVDD) and a first electrode of the light-emitting device 601. The first light-emitting control module 609 may include a P-type transistor or an N-type transistor. The second light-emitting control module 610 may include a P-type transistor or an N-type transistor.

[0146] The pixel circuit further includes a storage module Cst electrically connected to the control terminal of the driving module 604. For example, the storage module Cst is connected between the first power terminal (connected to the power voltage ELVDD) and the control terminal of the driving module 604.

[0147] For example, the control terminal of the first light control module and / or the control terminal of the second light control module receive the light control signal EM. The first light control module is connected between the first power supply terminal and the first terminal of the driver module. The second light control module is connected between the second terminal of the driver module and the first terminal of the light emitting device 601.

[0148] The above-mentioned pixel circuit includes part or all of the first transistor T1, the second transistor T2, the third transistor T3, the fourth transistor T4, the fifth transistor T5, the sixth transistor T6, the seventh transistor T7, and the eighth transistor T8, and any one of the first transistor T1 to the eighth transistor T8 may include a P-type transistor or an N-type transistor.

[0149] In some embodiments, as Figure 6 As shown, the above-mentioned pixel circuit may further include a display driver chip 701 and a power supply chip 702. The above-mentioned display driver chip 701 can output the original initialization voltage signal Vrefn2' and the preset pulse signal based on different pins. The above-mentioned power supply chip 702 is used to receive the control instructions sent by the display driver chip 701 and output the power supply voltage signal ELVSS.

[0150] In some examples, a pulse generating circuit may be provided to generate the preset pulse signal. The superposition module 602 may superpose the original initialization voltage signal Vrefn2' received from the display driver chip 701 and the preset pulse signal output by the pulse generating circuit to obtain the initialization pulse signal Vrefn2.

[0151] It is conceivable that by setting the above circuit, the end time when the initialization voltage signal Vrefn2 changes from the third voltage value to the first voltage value can be synchronized with the end time when the power supply voltage signal changes from the fourth voltage value to the second voltage value, thereby improving the display effect.

[0152] In some embodiments, the amplitude of the preset pulse signal is a target adjustment voltage value, and before the original initialization voltage signal is superimposed with the preset signal to obtain the adjusted voltage value of the initialization voltage signal, the driving method further includes:

[0153] Calculate the absolute value of the difference between the third voltage value and the first voltage value to obtain the current target absolute value difference; based on the correspondence between the preset absolute value difference and the amplitude of the preset pulse signal, determine the target adjustment voltage value corresponding to the target absolute value difference and generate a preset pulse signal.

[0154] The absolute value of the difference between the third voltage value and the first voltage value can be calculated to obtain the current target absolute value difference; based on the correspondence between the preset absolute value difference and the voltage value of the preset signal, the target adjustment voltage value corresponding to the target absolute value difference is determined, and then the preset pulse signal including the above-mentioned target adjustment voltage value is determined, and the voltage value of the adjusted initialization voltage signal is obtained by superimposing the third voltage value of the original initialization voltage signal with the target adjustment voltage value of the preset signal.

[0155] For example, the superposition module and / or the pulse generating circuit are integrated into the display driver chip.

[0156] The embodiment of the present application determines the above-mentioned preset pulse signal by calculating the absolute value of the difference between the third voltage value and the first voltage value, which can improve the accuracy of the determined preset pulse signal, so that the initialization voltage signal is adjusted to the first voltage value based on the target voltage value and can be synchronized with the power supply voltage signal being adjusted to the second voltage value, thereby improving the flickering problem of the display panel when switching the dimming mode and improving the display effect.

[0157] Based on the same inventive concept, an embodiment of the present application further provides a display panel driving device, which can apply the display panel driving method of the above embodiment.

[0158] In some embodiments, as Figure 7 As shown, an embodiment of the present application provides a driving device 700 for a display panel, and the upper driving device includes an adjustment module 703. The above-mentioned adjustment module 703 is used to adjust the voltage value of the initialization voltage signal when the display brightness of the display panel is switched from a first brightness level to a second brightness level, so that the voltage value of the initialization voltage signal becomes a first voltage value, which is synchronized with the voltage value of the power supply voltage signal becoming a second voltage value. The first voltage value is the voltage value of the initialization voltage signal of the display panel at the second brightness level; the second voltage value is the voltage value of the power supply voltage signal of the display panel at the second brightness level.

[0159] The embodiment of the present application sets an adjustment module, which can adjust the voltage value of the initialization voltage signal when the display brightness of the display panel switches from a first brightness level to a second brightness level, so that the voltage value of the initialization voltage signal becomes the first voltage value, which is synchronized with the voltage value of the power supply voltage signal becoming the second voltage value, thereby achieving the synchronous adjustment of the voltage value of the initialization voltage signal and the voltage value of the power supply voltage signal to the first voltage value and the second voltage value, overcoming the flickering problem of the display panel when switching the display brightness in the prior art, and being able to improve the display effect of the display panel.

[0160] In some embodiments, as Figure 8 As shown, Figure 8 is a schematic diagram of an exemplary drive device, the drive device further comprising:

[0161] Display driver chip 701, used to output an original initialization voltage signal;

[0162] The power chip 702 is used to receive control instructions sent by the display driver chip 701 and output a power voltage signal;

[0163] The number of pulses of the light emitting control signal received by the display panel during a frame refresh period at the first brightness level is different from the number of pulses of the light emitting control signal received by the display panel during a frame refresh period at the second brightness level;

[0164] And / or, the start time of the process in which the voltage value of the initialization voltage signal gradually changes from the third voltage value to the first voltage value is before the start time of the process in which the voltage value of the power supply voltage signal gradually changes from the fourth voltage value to the second voltage value; the third voltage value is the voltage value of the initialization voltage signal of the display panel at the first brightness level; and the fourth voltage value is the voltage value of the power supply voltage signal of the display panel at the first brightness level;

[0165] and / or, at the start of a process in which the voltage value of the initialization voltage signal gradually changes from the third voltage value to the first voltage value, the display driver chip 701 sends a control instruction to the power supply chip 702, so that the power supply chip 702 adjusts the voltage value of the power supply voltage signal to the second voltage value based on the control instruction;

[0166] And / or, the display driver chip 701 completes sending the control instruction before the start of the process in which the voltage value of the power supply voltage signal gradually changes from the fourth voltage value to the second voltage value;

[0167] And / or, the end time of the process in which the voltage value of the initialization voltage signal gradually changes from the third voltage value to the first voltage value is synchronized with the end time of the process in which the voltage value of the power supply voltage signal gradually changes from the fourth voltage value to the second voltage value;

[0168] and / or, the display panel is in a DC dimming mode when at one of the first brightness level and the second brightness level, and is in a pulse width dimming mode when at the other of the first brightness level and the second brightness level;

[0169] And / or, the first brightness level is greater than the second brightness level, the display panel is in DC dimming mode when the brightness level is greater than or equal to the first brightness level, and the display panel is in pulse width dimming mode when the brightness level is less than or equal to the second brightness level.

[0170] The embodiment of the present application sets a driving device including a display driving chip 701 and a power supply chip 702 and sets the starting time of the process in which the voltage value of the initialization voltage signal gradually changes from the third voltage value to the first voltage value to be before the starting time of the process in which the voltage value of the power supply voltage signal gradually changes from the fourth voltage value to the second voltage value. This can achieve synchronous adjustment of the voltage value of the initialization voltage signal and the voltage value of the power supply voltage signal to the first voltage value and the second voltage value, thereby improving the display effect.

[0171] In some embodiments, the driving device further comprises:

[0172] Display driver chip 701, used to output an original initialization voltage signal;

[0173] The adjustment module 703 includes a superposition module;

[0174] The superposition module is used to superimpose the original initialization voltage signal and the preset signal to obtain the voltage value of the adjusted initialization voltage signal. For example, the superposition module is integrated into the display driver chip.

[0175] In some embodiments, the preset signal is a preset pulse signal.

[0176] In some embodiments, the width of the preset pulse signal is smaller than a first time period, and the first time period is from the start time of the process in which the voltage value of the initialization voltage signal gradually changes from the third voltage value to the first voltage value to the end time of the process in which the voltage value of the power supply voltage signal gradually changes from the fourth voltage value to the second voltage value; the third voltage value is the voltage value of the initialization voltage signal of the display panel at the first brightness level; and the fourth voltage value is the voltage value of the power supply voltage signal of the display panel at the first brightness level.

[0177] And / or, the width of the preset pulse signal is greater than the second time period, and the second time period is the start time to the end time of a process in which the voltage value of the original initialization voltage signal gradually changes from the third voltage value to the first voltage value when no preset signal is set;

[0178] And / or, the width of the preset pulse signal is greater than a third time period, and the third time period is the starting moment of the process in which the voltage value of the original initialization voltage signal gradually changes from the third voltage value to the first voltage value to the starting moment of the process in which the voltage value of the power supply voltage signal gradually changes from the fourth voltage value to the second voltage value.

[0179] In some embodiments, when the first voltage value is less than the third voltage value, the amplitude of the preset pulse signal is positive;

[0180] and / or, when the first voltage value is greater than the third voltage value, the amplitude of the preset pulse signal is negative;

[0181] And / or, the absolute value of the amplitude of the preset pulse signal is smaller than the absolute value of the difference between the third voltage value and the first voltage value.

[0182] In some embodiments, as Figure 8 As shown, the driving device further includes a pulse generating circuit 704 for outputting a preset pulse signal. For example, the pulse generating circuit is integrated into the display driver chip. The display driver chip 701 can be used to output the preset pulse signal.

[0183] In some embodiments, the display panel includes a pixel circuit and a light-emitting device, the pixel circuit is electrically connected to the first pole of the light-emitting device, the second pole of the light-emitting device is connected to the power supply voltage signal, the pixel circuit includes a first initialization module, the first end of the first initialization module is connected to the initialization voltage signal, and the second end of the first initialization module is electrically connected to the second pole of the light-emitting device.

[0184] In some embodiments, the pixel circuit includes a driving module and a second initialization module, and the second initialization module is electrically connected to the first terminal or the second terminal of the driving module.

[0185] In some embodiments, the control terminal of the first initialization module is electrically connected to the control terminal of the second initialization module.

[0186] In some embodiments, the pixel circuit further includes a third initialization module, and the third initialization module is electrically connected to the control terminal or the second terminal of the driving module.

[0187] In some embodiments, the pixel circuit further includes a data writing module and / or a threshold compensation module, the data writing module is connected between the data line and the first end of the driving module, and the threshold compensation module is connected between the second end of the driving module and the control end.

[0188] In some embodiments, the third initialization module includes a metal oxide transistor; and the threshold compensation module includes a metal oxide transistor.

[0189] In some embodiments, the pixel circuit further includes a first light emitting control module and / or a second light emitting control module, wherein the first light emitting control module and / or the second light emitting control module are connected in series with the driving module and between the first power supply terminal and the first electrode of the light emitting device;

[0190] The control end of the first light-emitting control module and / or the control end of the second light-emitting control module are connected to the light-emitting control signal; the first light-emitting control module is connected between the first power supply end and the first end of the driving module, and the second light-emitting control module is connected between the second end of the driving module and the first pole of the light-emitting device.

[0191] In some embodiments, the pixel circuit further includes a storage module connected between the first terminal of the first light emitting control module and the control terminal of the driving module.

[0192] The above embodiment sets up a pixel circuit including a pulse generating circuit, generates a preset pulse signal through the pulse generating circuit, superimposes the original initialization pulse signal and the preset pulse signal generated by the pulse generating circuit through the superposition module, and generates a preset pulse signal with a preset amplitude and size through the above pulse generating circuit, so as to achieve synchronization of the moment when the initialization voltage signal changes from the first voltage value to the third voltage value and the moment when the power supply voltage signal changes from the fourth voltage value to the second voltage value, thereby avoiding adverse problems such as flickering caused by switching brightness levels of the display panel, which is beneficial to improving the display effect.

[0193] In some embodiments, the voltage amplitude of the preset pulse signal is a target adjustment voltage value, and the display driver chip is further configured to:

[0194] Calculating an absolute value of a difference between the third voltage value and the first voltage value to obtain a current target absolute value difference;

[0195] Based on the corresponding relationship between the preset absolute value difference and the amplitude of the preset pulse signal, a target adjustment voltage value corresponding to the target absolute value difference is determined, and a preset pulse signal is generated.

[0196] The device of the above embodiment is used to implement the corresponding display panel driving device in any of the above embodiments, and has the beneficial effects of the corresponding method embodiment, which will not be described in detail here.

[0197] Figure 9 A schematic diagram of the hardware structure of a display device provided in an embodiment of the application.

[0198] The display device 900 may include a processor 901 and a memory 902 storing computer program instructions.

[0199] Specifically, the processor 901 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.

[0200] The memory 902 may include a large capacity memory for data or instructions. By way of example and not limitation, the memory 902 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. Where appropriate, the memory 902 may include removable or non-removable (or fixed) media. Where appropriate, the memory 902 may be inside or outside the integrated gateway disaster recovery device. In a specific embodiment, the memory 902 is a non-volatile solid-state memory.

[0201] In certain embodiments, memory 902 includes read-only memory (ROM). The ROM may be mask-programmed ROM, programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), electrically alterable ROM (EAROM), or flash memory, or a combination of two or more thereof, where appropriate.

[0202] The memory 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, generally, 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 the first aspect of the present application.

[0203] The processor 901 reads and executes computer program instructions stored in the memory 902 to implement any one of the display panel driving methods in the above embodiments.

[0204] In one example, the display device may further include a communication interface 903 and a bus 904. Figure 9 The processor 901, the memory 902, and the communication interface 903 are connected via a bus 904 and communicate with each other.

[0205] The communication interface 903 is mainly used to implement communication between various modules, devices, units and / or equipment in the embodiments of the present application.

[0206] Bus 904 includes hardware, software or both, and the parts of online data flow metering equipment are coupled to each other. For example, but not limitation, bus can include accelerated graphics port (AGP) or other graphics bus, enhanced industry standard architecture (EISA) bus, front side bus (FSB), hypertransport (HT) interconnection, 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 904 can include one or more buses. Although the present application embodiment describes and shows specific bus, the application considers any suitable bus or interconnection.

[0207] The display device of the above embodiment is used to implement the corresponding display panel driving method in any of the above embodiments, and has the beneficial effects of the corresponding method embodiment, which will not be described in detail here.

[0208] In addition, in conjunction with the display panel driving method in the above embodiments, the present application can provide a computer storage medium for implementation. The computer storage medium stores computer program instructions; when the computer program instructions are executed by a processor, any of the display panel driving methods in the above embodiments is implemented.

[0209] In addition, in combination with the display panel driving method in the above embodiments, the present application can provide a computer program product to implement the above embodiments. When the computer program product instructions are executed by a processor of a display device, any one of the display panel driving methods in the above embodiments is implemented.

[0210] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present application (including the claims) is limited to these examples. Within the scope of the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present application as described above, which are not provided in detail for the sake of simplicity.

[0211] 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, they can be, for example, electronic circuits, application specific integrated circuits (ASICs), appropriate firmware, plug-ins, function cards, etc. When implemented in software, the elements of the present application are programs or code segments that are 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 a communication link by a data signal carried in a carrier wave. "Machine-readable medium" can include any medium that can store or transmit information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROMs, flash memories, erasable ROMs (EROMs), floppy disks, CD-ROMs, optical disks, hard disks, optical fiber media, radio frequency (RF) links, etc. The code segment can be downloaded via a computer network such as the Internet, an intranet, etc.

[0212] It should also be noted that the exemplary embodiments mentioned in this application describe some methods or devices based on a series of steps or devices. However, this application is not limited to the order of the above steps. In other words, the steps can be performed in the order mentioned in the embodiments, or in a different order, or several steps can be performed simultaneously.

[0213] The present invention has been described above with reference to the flowchart and / or block diagram of the method, device (device) and computer program product according to the embodiments of the present application.It should be understood that each box in the flowchart and / or block diagram and the combination of each box in the flowchart and / or 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 via the processor of the computer or other programmable data processing device enable the realization of the function / action specified in one or more boxes of the flowchart and / or 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 is also understood that each box in the block diagram and / or the flowchart and the combination of the boxes in the block diagram and / or the flowchart 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.

[0214] The above description is only a specific embodiment of the present application. Those skilled in the art will clearly understand that for the convenience and brevity of description, the specific working processes of the devices, 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 scope of protection of the present application is not limited thereto. Any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present application, and these modifications or replacements should be included in the scope of protection of the present application.

[0215] It should be understood that the various forms of the processes shown above can be used to reorder, add, or delete steps. For example, the steps described in the present invention can be performed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of the present invention can be achieved. This is not limited herein.

[0216] The above specific embodiments do not limit the scope of protection of the present invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of protection of the present invention.

Claims

1. A method for driving a display panel, characterized in that: include: When the display brightness of the display panel is switched from a first brightness level to a second brightness level, adjusting a voltage value of an initialization voltage signal so that the voltage value of the initialization voltage signal becomes a first voltage value in synchronization with the voltage value of the power supply voltage signal changing to a second voltage value, the first voltage value being the voltage value of the initialization voltage signal of the display panel at the second brightness level; The second voltage value is a voltage value of a power supply voltage signal of the display panel at a second brightness level; The adjusting the voltage value of the initialization voltage signal includes: Superimposing the original initialization voltage signal and the preset signal to obtain an adjusted voltage value of the initialization voltage signal; The preset signal is a preset pulse signal; The width of the preset pulse signal is smaller than a first time period, and the first time period is from the start time of a process in which the voltage value of the initialization voltage signal gradually changes from the third voltage value to the first voltage value to the end time of a process in which the voltage value of the power supply voltage signal gradually changes from the fourth voltage value to the second voltage value; the third voltage value is the voltage value of the initialization voltage signal of the display panel at the first brightness level; and the fourth voltage value is the voltage value of the power supply voltage signal of the display panel at the first brightness level; The width of the preset pulse signal is greater than a third time period, and the third time period is from the start time to the end time of the process in which the voltage value of the original initialization voltage signal gradually changes from the third voltage value to the first voltage value; The width of the preset pulse signal is greater than a fourth time period, and the fourth time period is from the start time of the process in which the voltage value of the original initialization voltage signal gradually changes from the third voltage value to the first voltage value to the start time of the process in which the voltage value of the power supply voltage signal gradually changes from the fourth voltage value to the second voltage value; The start time of the preset pulse signal is synchronized with the start time of the process in which the original initialization voltage signal gradually changes from the third voltage value to the first voltage value; The end time of the preset pulse signal is later than the end time of the process in which the original initialization voltage signal gradually changes from the third voltage value to the first voltage value; The end time of the preset pulse signal is later than the start time of the process in which the voltage value of the power supply voltage signal gradually changes from the fourth voltage value to the second voltage value.

2. The method for driving a display panel according to claim 1, wherein: The number of pulses of the light emitting control signal received by the display panel during a frame refresh period at a first brightness level is different from the number of pulses of the light emitting control signal received by the display panel during a frame refresh period at a second brightness level.

3. The method for driving a display panel according to claim 1, wherein: The starting moment of the process in which the voltage value of the initialization voltage signal gradually changes from the third voltage value to the first voltage value is before the starting moment of the process in which the voltage value of the power supply voltage signal gradually changes from the fourth voltage value to the second voltage value; the third voltage value is the voltage value of the initialization voltage signal of the display panel at the first brightness level; the fourth voltage value is the voltage value of the power supply voltage signal of the display panel at the first brightness level.

4. The method for driving a display panel according to claim 1, wherein: At the beginning of the process in which the voltage value of the initialization voltage signal gradually changes from the third voltage value to the first voltage value, a control instruction is sent to the power supply chip so that the power supply chip adjusts the voltage value of the power supply voltage signal to the second voltage value based on the control instruction.

5. The method for driving a display panel according to claim 4, wherein: The end time of sending the control instruction is before the start time of the process in which the voltage value of the power supply voltage signal gradually changes from the fourth voltage value to the second voltage value.

6. The method for driving a display panel according to claim 1, wherein: The end time of the process of gradually changing the voltage value of the initialization voltage signal from the third voltage value to the first voltage value is synchronized with the end time of gradually changing the voltage value of the power supply voltage signal from the fourth voltage value to the second voltage value.

7. The method for driving a display panel according to claim 1, wherein: The display panel is in a DC dimming mode at one of a first brightness level and a second brightness level, and is in a pulse width dimming mode at the other of the first brightness level and the second brightness level.

8. The method for driving a display panel according to claim 1, wherein: The first brightness level is greater than the second brightness level, the display panel is in DC dimming mode in the first brightness level range, and the display panel is in pulse width dimming mode in the second brightness level range, one or more brightness levels in the first brightness level range is greater than or equal to the first brightness level, and one or more brightness levels in the second brightness level range is less than or equal to the second brightness level.

9. The method for driving a display panel according to claim 1, wherein: When the first voltage value is less than the third voltage value, the amplitude of the preset pulse signal is positive.

10. The method for driving a display panel according to claim 1, wherein: When the first voltage value is greater than the third voltage value, the amplitude of the preset pulse signal is negative.

11. The method for driving a display panel according to claim 9 or 10, wherein: An absolute value of the amplitude of the preset pulse signal is smaller than an absolute value of a difference between the third voltage value and the first voltage value.

12. The method for driving a display panel according to claim 1, wherein: The display panel includes a pixel circuit and a light-emitting device, the pixel circuit is electrically connected to the first pole of the light-emitting device, the second pole of the light-emitting device is connected to the power supply voltage signal, the pixel circuit includes a first initialization module, the first end of the first initialization module is connected to the initialization voltage signal, and the second end of the first initialization module is electrically connected to the second pole of the light-emitting device.

13. The method for driving a display panel according to claim 12, wherein: The pixel circuit includes a driving module and a second initialization module, wherein the second initialization module is electrically connected to the first end or the second end of the driving module.

14. The method for driving a display panel according to claim 13, wherein: The control end of the first initialization module is electrically connected to the control end of the second initialization module; the first initialization module and the second initialization module are electrically connected to different initialization signal lines.

15. The method for driving a display panel according to claim 13, wherein: The pixel circuit also includes a third initialization module, which is electrically connected to the control end or the second end of the driving module; the first initialization module and the third initialization module are electrically connected to different initialization signal lines; the second initialization module and the third initialization module are electrically connected to different initialization signal lines.

16. The method for driving a display panel according to claim 15, wherein: The pixel circuit further includes a data writing module and / or a threshold compensation module. The data writing module is connected between the data line and the first end of the driving module, and the threshold compensation module is connected between the second end of the driving module and the control end.

17. The method for driving a display panel according to claim 16, wherein: The third initialization module includes a metal oxide transistor; the threshold compensation module includes a metal oxide transistor.

18. The method for driving a display panel according to claim 13, wherein: The pixel circuit also includes a first light-emitting control module and / or a second light-emitting control module, which are connected in series with the driving module between the first power supply terminal and the first pole of the light-emitting device; the control terminal of the first light-emitting control module and / or the control terminal of the second light-emitting control module are connected to a light-emitting control signal; the first light-emitting control module is connected between the first power supply terminal and the first terminal of the driving module, and the second light-emitting control module is connected between the second terminal of the driving module and the first pole of the light-emitting device.

19. The method for driving a display panel according to claim 18, wherein: The pixel circuit further includes a storage module connected between the first power supply terminal and the control terminal of the driving module.

20. The method for driving a display panel according to claim 1, wherein: The amplitude of the preset pulse signal is a target adjustment voltage value. Before superimposing the original initialization voltage signal and the preset signal to obtain the adjusted voltage value of the initialization voltage signal, the driving method further includes: Calculating an absolute value of a difference between the third voltage value and the first voltage value to obtain a current target absolute value difference; Based on the corresponding relationship between the preset absolute value difference and the amplitude of the preset pulse signal, the target adjustment voltage value corresponding to the target absolute value difference is determined, and the preset pulse signal is generated.

21. A driving device for a display panel, characterized in that: include: an adjustment module, configured to adjust a voltage value of an initialization voltage signal when switching the display brightness of the display panel from a first brightness level to a second brightness level, so that the voltage value of the initialization voltage signal becomes a first voltage value, synchronized with the voltage value of the power supply voltage signal changing to a second voltage value, wherein the first voltage value is the voltage value of the initialization voltage signal of the display panel at the second brightness level; The second voltage value is a voltage value of a power supply voltage signal of the display panel at a second brightness level; The adjustment module includes: A superposition module, configured to superimpose the original initialization voltage signal with the preset signal to obtain an adjusted voltage value of the initialization voltage signal; The preset signal is a preset pulse signal; The width of the preset pulse signal is smaller than a first time period, and the first time period is from the start time of a process in which the voltage value of the initialization voltage signal gradually changes from the third voltage value to the first voltage value to the end time of a process in which the voltage value of the power supply voltage signal gradually changes from the fourth voltage value to the second voltage value; the third voltage value is the voltage value of the initialization voltage signal of the display panel at the first brightness level; and the fourth voltage value is the voltage value of the power supply voltage signal of the display panel at the first brightness level; The width of the preset pulse signal is greater than a third time period, and the third time period is from the start time to the end time of the process in which the voltage value of the original initialization voltage signal gradually changes from the third voltage value to the first voltage value; The width of the preset pulse signal is greater than a fourth time period, and the fourth time period is from the start time of the process in which the voltage value of the original initialization voltage signal gradually changes from the third voltage value to the first voltage value to the start time of the process in which the voltage value of the power supply voltage signal gradually changes from the fourth voltage value to the second voltage value; The start time of the preset pulse signal is synchronized with the start time of the process in which the original initialization voltage signal gradually changes from the third voltage value to the first voltage value; The end time of the preset pulse signal is later than the end time of the process in which the original initialization voltage signal gradually changes from the third voltage value to the first voltage value; The end time of the preset pulse signal is later than the start time of the process in which the voltage value of the power supply voltage signal gradually changes from the fourth voltage value to the second voltage value.

22. The display panel driving device according to claim 21, wherein: Also includes: Display driver chip; A power supply chip, configured to receive control instructions sent by the display driver chip and output a power supply voltage signal; The number of pulses of the light emitting control signal received by the display panel during a frame refresh period at a first brightness level is different from the number of pulses of the light emitting control signal received by the display panel during a frame refresh period at a second brightness level.

23. The driving device of a display panel according to claim 21, wherein: The starting moment of the process in which the voltage value of the initialization voltage signal gradually changes from the third voltage value to the first voltage value is before the starting moment of the process in which the voltage value of the power supply voltage signal gradually changes from the fourth voltage value to the second voltage value; the third voltage value is the voltage value of the initialization voltage signal of the display panel at the first brightness level; the fourth voltage value is the voltage value of the power supply voltage signal of the display panel at the first brightness level.

24. The display panel driving device according to claim 22, wherein: At the beginning of the process in which the voltage value of the initialization voltage signal gradually changes from the third voltage value to the first voltage value, the display driver chip sends a control instruction to the power supply chip, so that the power supply chip adjusts the voltage value of the power supply voltage signal to the second voltage value based on the control instruction.

25. The driving device of a display panel according to claim 24, wherein: The end time when the display driver chip finishes sending the control instruction is before the start time of the process in which the voltage value of the power supply voltage signal gradually changes from the fourth voltage value to the second voltage value.

26. The display panel driving device according to claim 21, wherein: The end time of the process of gradually changing the voltage value of the initialization voltage signal from the third voltage value to the first voltage value is synchronized with the end time of gradually changing the voltage value of the power supply voltage signal from the fourth voltage value to the second voltage value.

27. The driving device of a display panel according to claim 21, wherein: The display panel is in a DC dimming mode at one of a first brightness level and a second brightness level, and is in a pulse width dimming mode at the other of the first brightness level and the second brightness level.

28. The display panel driving device according to claim 21, wherein: The first brightness level is greater than the second brightness level, the display panel is in DC dimming mode in the first brightness level range, and the display panel is in pulse width dimming mode in the second brightness level range, one or more brightness levels in the first brightness level range is greater than or equal to the first brightness level, and one or more brightness levels in the second brightness level range is less than or equal to the second brightness level.

29. The display panel driving device according to claim 21, wherein: Also includes: Display driver chip, used to output the original initialization voltage signal.

30. The driving device of a display panel according to claim 21, wherein: When the first voltage value is less than the third voltage value, the amplitude of the preset pulse signal is positive.

31. The driving device of a display panel according to claim 22, wherein: When the first voltage value is greater than the third voltage value, the amplitude of the preset pulse signal is negative.

32. The driving device of a display panel according to claim 30 or 31, characterized in that: An absolute value of the amplitude of the preset pulse signal is smaller than an absolute value of a difference between the third voltage value and the first voltage value.

33. The driving device of a display panel according to claim 32, wherein: The driving device further includes a pulse generating circuit for outputting the preset pulse signal.

34. The driving device of a display panel according to claim 33, wherein: The superposition module and / or the pulse generating circuit are integrated into a display driver chip.

35. The driving device of a display panel according to claim 21, wherein: The display panel includes a pixel circuit and a light-emitting device, the pixel circuit is electrically connected to the first pole of the light-emitting device, the second pole of the light-emitting device is connected to the power supply voltage signal, the pixel circuit includes a first initialization module, the first end of the first initialization module is connected to the initialization voltage signal, and the second end of the first initialization module is electrically connected to the second pole of the light-emitting device.

36. The driving device of a display panel according to claim 35, wherein: The pixel circuit includes a driving module and a second initialization module, wherein the second initialization module is electrically connected to the first end or the second end of the driving module.

37. The driving device of a display panel according to claim 36, wherein: The control end of the first initialization module is electrically connected to the control end of the second initialization module.

38. The driving device of a display panel according to claim 36, wherein: The pixel circuit further includes a third initialization module, and the third initialization module is electrically connected to the control terminal or the second terminal of the driving module.

39. The driving device of a display panel according to claim 38, wherein: The pixel circuit further includes a data writing module and / or a threshold compensation module. The data writing module is connected between the data line and the first end of the driving module, and the threshold compensation module is connected between the second end of the driving module and the control end.

40. The driving device of a display panel according to claim 39, wherein: The third initialization module includes a metal oxide transistor; the threshold compensation module includes a metal oxide transistor.

41. The driving device of a display panel according to claim 36, wherein: The pixel circuit also includes a first light-emitting control module and / or a second light-emitting control module, wherein the first light-emitting control module is connected and / or the second light-emitting control module is connected in series with the driving module between the first power supply terminal and the first pole of the light-emitting device; the control end of the first light-emitting control module and / or the control end of the second light-emitting control module is connected to a light-emitting control signal; the first light-emitting control module is connected between the first power supply terminal and the first end of the driving module, and the second light-emitting control module is connected between the second end of the driving module and the first pole of the light-emitting device.

42. The driving device of a display panel according to claim 41, wherein: The pixel circuit further includes a storage module connected between the first power supply terminal and the control terminal of the driving module.

43. A display device, characterized in that The device includes: a processor, and a memory storing computer program instructions; The processor reads and executes the computer program instructions to implement the driving method of the display panel according to any one of claims 1 to 20.

Images