Display device and driving method thereof

Abstract

Embodiments of the present application provide a display device and a driving method thereof, and relate to the technical field of display panels. The display device comprises a display panel and a display driving module. The first color sub-pixel comprises a first light emitting element. The second color sub-pixel comprises a second light emitting element. The display driving module is configured to control a voltage difference between an anode and a cathode of the first light emitting element to be a first voltage difference, and control a voltage difference between an anode and a cathode of the second light emitting element to be a second voltage difference. Under the action of the first voltage difference, a first frame brightness ratio of the first color sub-pixel is a first first frame brightness ratio. Under the action of the second voltage difference, a first frame brightness ratio of the second color sub-pixel is a second first frame brightness ratio. A difference between the first first frame brightness ratio and the second first frame brightness ratio is less than a preset threshold. According to the embodiments of the present application, the ghosting and color deviation problem of the display panel can be effectively improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of display panels, and particularly relates to a display device and a driving method thereof. BACKGROUND

[0002] With the rapid development of display technology, people's demand for display effect of, for example, an organic light-emitting diode (OLED) display panel is also increasing. In the technical field of display panels, various different colors of visible light are obtained by setting different proportions of R, G, and B three primary colors. However, the conventional OLED display panel structure often presents a trailing color deviation phenomenon, which seriously affects the user experience. Based on this, the trailing color deviation problem existing in the display panel is one of the main problems to be solved in the industry at the present stage. SUMMARY

[0003] Embodiments of the present application provide a display device and a driving method thereof, which can effectively improve the trailing color deviation problem of the display panel.

[0004] In a first aspect, embodiments of the present application provide a display device, which includes a display panel and a display driving module, the display panel including a plurality of first color sub-pixels, a plurality of second color sub-pixels, and a plurality of third color sub-pixels.

[0005] The first color sub-pixel includes a first light-emitting element, and the second color sub-pixel includes a second light-emitting element.

[0006] The display driving module is configured to control a voltage difference between an anode and a cathode of the first light-emitting element to be a first voltage difference at a target stage.

[0007] And control a voltage difference between an anode and a cathode of the second light-emitting element to be a second voltage difference.

[0008] The values of the first voltage difference and the second voltage difference satisfy a preset condition, and the preset condition includes: under the action of the first voltage difference, a first-frame brightness ratio of the first color sub-pixel is a first first-frame brightness ratio; and under the action of the second voltage difference, a first-frame brightness ratio of the second color sub-pixel is a second first-frame brightness ratio.

[0009] The difference between the first first-frame brightness ratio and the second first-frame brightness ratio is less than a preset threshold value; the first-frame brightness ratio is a ratio of a brightness of a first frame of a picture to a maximum brightness / average brightness of a plurality of frames of pictures after stabilization when a picture displayed by the display panel is switched from a black picture to a target gray-scale picture of a target color, and the target color at least includes the first color or the second color.

[0010] In a possible implementation manner of the first aspect, in order to more reasonably control the voltage difference between the cathode and the anode of the light emitting element, the cathode of the light emitting element can be controlled in a region-by-region manner, so as to achieve different cathode voltages for different regions of the light emitting element. Based on this, the cathode of the first light emitting element is electrically connected to the first power voltage signal line, and is configured to receive the first power voltage signal provided by the first power voltage signal line; the cathode of the second light emitting element is electrically connected to the second power voltage signal line, and is configured to receive the second power voltage signal provided by the second power voltage signal line; under the action of the first power voltage signal and the second power voltage signal, the first voltage difference and the second voltage difference satisfy a preset condition, and the difference between the first first-frame brightness ratio and the second first-frame brightness ratio is less than a preset threshold.

[0011] In a possible implementation manner of the first aspect, the color displayed by the third color sub-pixel is blue.

[0012] In a possible implementation manner of the first aspect, further, in the target stage, in the case that the voltage difference between the anode and the cathode of the first light emitting element is consistent with the voltage difference between the anode and the cathode of the second light emitting element, the first first-frame brightness ratio of the first color sub-pixel is greater than the second first-frame brightness ratio of the second color sub-pixel; if the anode voltage of the first light emitting element and the anode voltage of the second light emitting element are consistent in the target stage, the voltage value of the first power voltage signal is greater than the voltage value of the second power voltage signal, so that the difference between the first first-frame brightness ratio and the second first-frame brightness ratio is less than a preset threshold.

[0013] In a possible implementation manner of the first aspect, the parasitic capacitance of the first light emitting element in the first color sub-pixel has a capacitance value less than the capacitance value of the parasitic capacitance of the second light emitting element in the second color sub-pixel.

[0014] In a possible implementation manner of the first aspect, the third color sub-pixel includes a third light emitting element, the cathode of the third light emitting element is electrically connected to the third power voltage signal line, and is configured to receive the third power voltage signal provided by the third power voltage signal line; under the action of the third power voltage signal, the first first-frame brightness ratio of the third color sub-pixel is a third first-frame brightness ratio; and the difference between any two of the first first-frame brightness ratio, the second first-frame brightness ratio and the third first-frame brightness ratio is less than a preset threshold.

[0015] In a possible implementation of the first aspect, in the target stage, when the voltage difference between the anode and the cathode of the first light emitting element, the voltage difference between the anode and the cathode of the second light emitting element, and the voltage difference between the anode and the cathode of the third light emitting element are consistent, the first color sub-pixel has a first frame brightness ratio greater than a third color sub-pixel, and the third color sub-pixel has a first frame brightness ratio greater than a second color sub-pixel; if the anode voltages of the first light emitting element, the second light emitting element, and the third light emitting element are consistent in the target stage, the voltage value of the first power voltage signal is greater than the voltage value of the third power voltage signal, and the voltage value of the third power voltage signal is greater than the voltage value of the second power voltage signal, so that the difference between any two of the first first frame brightness ratio, the second first frame brightness ratio, and the third first frame brightness ratio is less than a preset threshold.

[0016] In a possible implementation of the first aspect, the parasitic capacitance of the first light emitting element in the first color sub-pixel has a capacitance value less than the parasitic capacitance of the third light emitting element in the third color sub-pixel, and the parasitic capacitance of the third light emitting element in the third color sub-pixel has a capacitance value less than the parasitic capacitance of the second light emitting element in the second color sub-pixel.

[0017] In a possible implementation of the first aspect, to more reasonably determine the voltage values of the first power voltage signal and the second power voltage signal, so as to sufficiently ensure that the difference between the first first frame brightness ratio and the second first frame brightness ratio corresponding to the first color sub-pixel and the second color sub-pixel is less than a preset threshold or even tends to be consistent, the voltage value of the first power voltage signal and the voltage value of the second power voltage signal are determined based on a target operation; the target operation includes: determining a first alpha first frame brightness ratio of the first color sub-pixel when the voltage value of the power voltage signal provided by the first power voltage signal line is a first voltage; determining a second alpha first frame brightness ratio of the second color sub-pixel when the voltage value of the power voltage signal provided by the second power voltage signal line is a second voltage; determining a second beta first frame brightness ratio of the second color sub-pixel when the voltage value of the power voltage signal provided by the second power voltage signal line is a third voltage; determining the voltage value of the first power voltage signal based on the first voltage; and determining the voltage value of the second power voltage signal based on the first voltage, the second voltage, the third voltage, the first alpha first frame brightness ratio, the second alpha first frame brightness ratio, and the second beta first frame brightness ratio.

[0018] In a possible implementation of the first aspect, determining the first power voltage signal based on the first voltage comprises: determining the first voltage as a voltage value of the first power voltage signal; and determining a voltage value of the second power voltage signal based on the first voltage, the second voltage, the third voltage, the first first-frame brightness ratio, the second first-frame brightness ratio, and the second first-frame brightness ratio of the second group comprises: determining a target coefficient according to a difference between the second first-frame brightness ratio of the second group and the second first-frame brightness ratio of the second group and a difference between the second voltage and the third voltage; and determining the voltage value of the second power voltage signal based on the target coefficient, the second first-frame brightness ratio of the second group, and target data. The target data is a combination of the second voltage and the first first-frame brightness ratio of the second group, or the target data is a combination of the third voltage and the second first-frame brightness ratio of the second group.

[0019] In a possible implementation of the first aspect, the target coefficient is determined according to a difference between the second first-frame brightness ratio of the second group and the second first-frame brightness ratio of the second group and a difference between the second voltage and the third voltage, and comprises: taking a ratio of the first difference to the second difference as the target coefficient, where the first difference is the difference between the second first-frame brightness ratio of the second group and the second first-frame brightness ratio of the second group, and the second difference is the difference between the second voltage and the third voltage.

[0020] In a possible implementation of the first aspect, the target coefficient is calculated based on a first relationship, and the first relationship is x = (FFR_b2-FFR_b1) / (V3-V2), where x is the target coefficient, V2 is the second voltage, V3 is the third voltage, FFR_b1 is the first first-frame brightness ratio of the second group, and FFR_b2 is the second first-frame brightness ratio of the second group. The voltage value of the second power voltage signal is determined based on the target coefficient, the second first-frame brightness ratio of the second group, and target data, and comprises: calculating the voltage value of the second power voltage signal according to a second relationship or a third relationship, where the second relationship is VSS_2 = V3+(FFR_b2-FFR_a1) / x, and the third relationship is VSS_2 = V2+(FFR_b1-FFR_a1) / x, where VSS_2 is the voltage value of the second power voltage signal, and FFR_a1 is the first first-frame brightness ratio of the first group.

[0021] In a possible implementation of the first aspect, in order to more reasonably control the voltage difference between the cathode and the anode of the light emitting element, in addition to the sub-area control of the cathode of the light emitting element, the sub-area control of the anode voltage of the light emitting element at the target stage can also be considered, so that different anode voltages are provided to the light emitting elements under different color sub-pixels. Based on this, in the target stage, when the voltage difference between the anode and the cathode of the first light emitting element is consistent with the voltage difference between the anode and the cathode of the second light emitting element, the first frame brightness ratio of the first color sub-pixel is greater than the first frame brightness ratio of the second color sub-pixel; the first color sub-pixel further includes a first anode initialization module, and the second color sub-pixel further includes a second anode initialization module; a first end of the first anode initialization module is electrically connected with a first reference voltage terminal, a second end of the first anode initialization module is electrically connected with the anode of the first light emitting element, and is configured to provide a first reference voltage signal provided by the first reference voltage terminal to the anode of the first light emitting element to initialize the anode of the first light emitting element in the target stage; a first end of the second anode initialization module is electrically connected with a second reference voltage terminal, a second end of the second anode initialization module is electrically connected with the anode of the second light emitting element, and is configured to provide a second reference voltage signal provided by the second reference voltage terminal to the anode of the second light emitting element to initialize the anode of the second light emitting element in the target stage; if the cathode voltages of the first light emitting element and the second light emitting element are consistent in the target stage, the voltage value of the first reference voltage signal is less than the voltage value of the second reference voltage signal, so that the difference between the first first frame brightness ratio and the second first frame brightness ratio is less than a preset threshold.

[0022] Based on the same inventive concept, in a second aspect, the embodiments of the present application provide a driving method of a display device, the display device comprising a display panel, the display panel comprising a plurality of first color sub-pixels, a plurality of second color sub-pixels and a plurality of third color sub-pixels; the first color sub-pixel comprising a first light emitting element; the second color sub-pixel comprising a second light emitting element; the driving method of the display device comprising:

[0023] controlling a voltage difference between the anode and the cathode of the first light emitting element to be a first voltage difference in a target stage;

[0024] controlling a voltage difference between the anode and the cathode of the second light emitting element to be a second voltage difference; the values of the first voltage difference and the second voltage difference satisfying a preset condition, the preset condition comprising: under the action of the first voltage difference, a first frame brightness ratio of the first color sub-pixel is a first first frame brightness ratio; under the action of the second voltage difference, a first frame brightness ratio of the second color sub-pixel is a second first frame brightness ratio; wherein the difference between the first first frame brightness ratio and the second first frame brightness ratio is less than a preset threshold.

[0025] In a possible implementation manner of the second aspect, in order to more reasonably control the voltage difference between the cathode and the anode of the light emitting element, the cathode of the light emitting element can be controlled in a region-by-region manner, so as to achieve different cathode voltages for different regions of the light emitting element. Based on this, the cathode of the first light emitting element is electrically connected to the first power voltage signal line; the cathode of the second light emitting element is electrically connected to the second power voltage signal line; and the driving method of the display device further includes: controlling the first power voltage signal line to provide a first power voltage signal, so that the voltage difference between the anode and the cathode of the first light emitting element is a first voltage difference; and controlling the second power voltage signal line to provide a second power voltage signal, so that the voltage difference between the anode and the cathode of the second light emitting element is a second voltage difference; wherein, under the action of the first power voltage signal and the second power voltage signal, the values of the first voltage difference and the second voltage difference satisfy a preset condition, and the difference between the first first-frame brightness proportion and the second first-frame brightness proportion is less than a preset threshold.

[0026] In a possible implementation manner of the second aspect, in the target stage, when the voltage difference between the anode and the cathode of the first light emitting element is consistent with the voltage difference between the anode and the cathode of the second light emitting element, the first first-frame brightness proportion of the first color sub-pixel is greater than the second first-frame brightness proportion of the second color sub-pixel; and the driving method further includes: if the anode voltages of the first light emitting element and the second light emitting element are consistent in the target stage, the voltage value of the first power voltage signal is greater than the voltage value of the second power voltage signal, so that the difference between the first first-frame brightness proportion and the second first-frame brightness proportion is less than a preset threshold.

[0027] In a possible implementation manner of the second aspect, the color displayed by the third color sub-pixel is blue.

[0028] In a possible implementation of the second aspect, to more reasonably determine the voltage values of the first power voltage signal and the second power voltage signal, so as to sufficiently ensure that the difference between the first first-frame brightness proportion and the second first-frame brightness proportion corresponding to the first color sub-pixel and the second color sub-pixel is less than a preset threshold or even tends to be consistent, before the first power voltage signal is provided on the first power voltage signal line and the second power voltage signal is provided on the second power voltage signal line, the driving method further includes: determining a first first-frame brightness proportion of the first color sub-pixel when the voltage value of the power voltage signal provided on the first power voltage signal line is a first voltage; determining a second first-frame brightness proportion of the second color sub-pixel when the voltage value of the power voltage signal provided on the second power voltage signal line is a second voltage; determining a second second-frame brightness proportion of the second color sub-pixel when the voltage value of the power voltage signal provided on the second power voltage signal line is a third voltage; determining the voltage value of the first power voltage signal based on the first voltage; and determining the voltage value of the second power voltage signal based on the first voltage, the second voltage, the third voltage, the first first-frame brightness proportion, the second first-frame brightness proportion, and the second second-frame brightness proportion.

[0029] In a possible implementation of the second aspect, the determining of the first power voltage signal based on the first voltage includes: determining the first voltage as the voltage value of the first power voltage signal; and the determining of the voltage value of the second power voltage signal based on the first voltage, the second voltage, the third voltage, the first first-frame brightness proportion, the second first-frame brightness proportion, and the second second-frame brightness proportion includes: determining a target coefficient according to a difference between the second first-frame brightness proportion and the second second-frame brightness proportion and a difference between the second voltage and the third voltage; determining the voltage value of the second power voltage signal based on the target coefficient, the second second-frame brightness proportion, and target data; and the target data is a combination of the second voltage and the second first-frame brightness proportion, or the target data is a combination of the third voltage and the second second-frame brightness proportion.

[0030] In a possible implementation of the second aspect, the determining of the target coefficient according to the difference between the second first-frame brightness proportion and the second second-frame brightness proportion and the difference between the second voltage and the third voltage includes: taking a ratio of a first difference to a second difference as the target coefficient; the first difference is the difference between the second first-frame brightness proportion and the second second-frame brightness proportion, and the second difference is the difference between the second voltage and the third voltage.

[0031] In a possible implementation of the second aspect, the target coefficient is calculated based on a first relationship, the first relationship being: x=(FFR_b2-FFR_b1) / (V3-V2), where x is the target coefficient, V2 is the second voltage, V3 is the third voltage, FFR_b1 is the second first-frame brightness ratio of the first type, and FFR_b2 is the second first-frame brightness ratio of the second type; and the voltage value of the second power voltage signal is determined based on the target coefficient, the second first-frame brightness ratio of the second type, and the target data, including: the voltage value of the second power voltage signal is calculated according to a second relationship or a third relationship, the second relationship being: VSS_2=V3+(FFR_b2-FFR_a1) / x, where VSS_2 is the voltage value of the second power voltage signal, and FFR_a1 is the first first-frame brightness ratio of the first type, and the third relationship being: VSS_2=V2+(FFR_b1-FFR_a1) / x.

[0032] In a third aspect, an electronic device is provided, which includes a processor, a memory, and a computer program stored in the memory and capable of running on the processor, and the computer program, when executed by the processor, implements the steps of the driving method provided in the second aspect.

[0033] In a fourth aspect, a computer readable storage medium is provided, which stores a computer program, and the computer program, when executed by a processor, implements the steps of the driving method provided in the second aspect.

[0034] The display device and the driving method thereof provided in the embodiments of the present application can effectively improve the display panel's afterimage color cast problem and improve the display panel's display effect by adjusting the voltage difference between the anode and the cathode of the light emitting element of different color subpixels to control the first-frame brightness ratios of different color subpixels to be consistent. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments of the present application. For those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0036] Figure 1 is a structural schematic diagram of a display device provided by an embodiment of the present application;

[0037] Figure 2 is a structural schematic diagram of a sub-pixel provided by an embodiment of the present application;

[0038] Figure 3 is a schematic diagram of definition of a first-frame brightness ratio provided by an embodiment of the present application;

[0039] Figure 4 is a structural schematic diagram of a display panel provided by an embodiment of the present application;

[0040] Figure 5 is a structural schematic diagram of a first-color sub-pixel provided by an embodiment of the present application;

[0041] Figure 6 is a structural schematic diagram of another first-color sub-pixel provided by an embodiment of the present application;

[0042] Figure 7 is a structural schematic diagram of another sub-pixel provided by an embodiment of the present application;

[0043] Figure 8 is a flowchart of a driving method of a display device provided by an embodiment of the present application;

[0044] Figure 9 is a flowchart of another driving method of a display device provided by an embodiment of the present application;

[0045] Figure 10 is a flowchart of still another driving method of a display device provided by an embodiment of the present application;

[0046] Figure 11 is a flowchart of still another driving method of a display device provided by an embodiment of the present application;

[0047] Figure 12 is a flowchart of still another driving method of a display device provided by an embodiment of the present application;

[0048] Figure 13 is a structural schematic diagram of a driving device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0049] The features and exemplary embodiments of the various aspects of the application will be described in detail below with reference to the figures. For the purpose of clarity, the description will be made with reference to the accompanying drawings in which the same reference numbers indicate similar features. It is to be understood that the following detailed description is merely exemplary and is not intended to limit the application. The application can be practiced with some of these specific details, which are set forth with the understanding that the same are capable of modification in various respects and that such changes are contemplated. The making and using of the application are discussed in detail below.

[0050] It should be noted that the terms "first" and "second" and the like are used merely to distinguish one element from another, and do not require or imply that the elements are in any way mutually exclusive or that they are either in a temporal sequence or in any other sequence. Also, the terms "comprise", "comprising", or any other variation thereof are used in this document to mean that the object or method described contains the elements or steps listed, but not excluding other elements or steps. The terms "include", "including", or any other variation thereof are used in this document to mean that the object or method described includes the elements or steps listed, but not excluding other elements or steps.

[0051] It should be understood that the term "and / or" as used herein is merely an associative relationship between the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the following three cases: A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in this document generally represents that the front and rear associated objects have an "or" relationship.

[0052] It should be noted that the transistor in the embodiments of the present application can be an N-type transistor or a P-type transistor. For the N-type transistor, the on level is high level and the off level is low level. That is, when the gate of the N-type transistor is high level, the first electrode and the second electrode of the N-type transistor are turned on, and when the gate of the N-type transistor is low level, the first electrode and the second electrode of the N-type transistor are turned off. For the P-type transistor, the on level is low level and the off level is high level. That is, when the control electrode of the P-type transistor is low level, the first electrode and the second electrode of the P-type transistor are turned on, and when the control electrode of the P-type transistor is high level, the first electrode and the second electrode of the P-type transistor are turned off. In the specific implementation, the gate of each transistor is used as the control electrode thereof, and according to the signal of the gate of each transistor and the type of the transistor, the first electrode can be used as the source electrode and the second electrode can be used as the drain electrode, or the first electrode can be used as the drain electrode and the second electrode can be used as the source electrode, which is not distinguished herein. In addition, the on level and the off level in the embodiments of the present application are generic, the on level refers to any level that can turn on the transistor, and the off level refers to any level that can turn off / turn off the transistor.

[0053] In the embodiments of the present application, the term "electrically connected" can refer to that two components are directly electrically connected, or that two components are electrically connected via one or more other components.

[0054] Various modifications and changes can be made to the present application in light of the foregoing without departing from the spirit or scope of the present application, which is defined in the appended claims. Accordingly, the present application is intended to embrace all such modifications and changes that fall within the scope of the corresponding claims (claims for the technical solutions to be protected). It should be noted that the embodiments provided in the present application can be combined with each other without contradiction.

[0055] Before the technical solutions provided by the embodiments of the present application are described, the problems in the related art are first described in detail in order to facilitate the understanding of the embodiments of the present application:

[0056] As described above, the inventors of the present application found that, in the related art, due to the influence of the driving circuit and the device structure, the display panel has the problem of ghost color cast, which seriously affects the product use experience of the user.

[0057] In order to solve the problem of ghost color cast of the display panel, the inventors of the present application first researched and analyzed the root cause of the above technical problem, and the specific research and analysis process is as follows:

[0058] The inventors of the present application find that in the prior display module, when the picture displayed by the display panel is switched from a black picture to a single-color picture with the maximum gray scale, the R, G and B sub-pixels will be uniformly pre-charged with a charge quantity in an initialization stage before the enabling of the light-emitting control signal, so as to facilitate the light-emitting start in the subsequent light-emitting stage. In the prior art, the pre-charged charge quantity of each sub-pixel is consistent. However, due to the differences in the parasitic capacitance values of each sub-pixel itself and the parasitic capacitance generated by the module layer structure (such as the light-emitting layer), if the same charge quantity is charged in the initialization stage, the start-up rates of sub-pixels of different colors will not be consistent, thereby causing the ghosting color cast problem.

[0059] The inventors of the present application further find that in the current initialization stage before the enabling of the light-emitting control signal of the R, G and B sub-pixels, the actual reason for pre-charging the same charge quantity is that the voltage difference between the cathode and the anode of the light-emitting element of each color sub-pixel is consistent. Therefore, the display panel ghosting color cast problem occurs, which affects the display effect of the display panel.

[0060] In view of the above research findings of the inventors, the embodiments of the present application provide a display device and a driving method thereof, which can solve the technical problems of the display panel ghosting color cast and poor display effect in the related art. It should be noted that the embodiments provided by the present application are not intended to limit the scope of the present disclosure.

[0061] The technical concept of the embodiments of the present application is to adjust the voltage difference between the anode and the cathode of the light-emitting element of sub-pixels of different colors, so that the first-frame brightness ratio of sub-pixels of different colors tends to be consistent, thereby sufficiently improving the ghosting color cast problem of the display panel and improving the display effect of the display panel.

[0062] First, the display device provided by the embodiments of the present application will be introduced.

[0063] Figure 1 The structure of the display device provided by an embodiment of the present application is shown. As shown in Figure 1 , Figure 1 The display device 1000 provided by the present application includes a display panel 100 and a display driving module. Figure 1 The embodiments take a mobile phone as an example to illustrate the display device 1000. It should be understood that the display device 1000 provided by the embodiments of the present application can be a wearable product, a computer, a television, a vehicle-mounted display device or other display devices with display functions, and the present application does not make specific limitations thereto.

[0064] The display panel 100 provided by the embodiment of the present application can be an organic light-emitting diode (OLED) display panel. In addition, those skilled in the art should understand that in other implementation manners of the present application, the display panel can also be a micro light-emitting diode (Micro LED) display panel, a quantum dot display panel, etc.

[0065] The display driving module can be a driving circuit including a display driving chip (DDIC), and the present application does not make specific limitation thereto.

[0066] As shown in Figure 1 The display device 1000 includes a display panel 100, and the display panel 100 can include a plurality of first color sub-pixels 10, a plurality of second color sub-pixels 20, and a plurality of third color sub-pixels 30. The first color sub-pixels 10, the second color sub-pixels 20, and the third color sub-pixels 30 can correspond to any color order combination of R, G, and B three primary colors, and the present application does not make specific limitation thereto.

[0067] Exemplarily, the first color sub-pixel 10 can be a red sub-pixel, the second color sub-pixel 20 can be a green sub-pixel, and the third color sub-pixel can be a blue sub-pixel. Alternatively, the first color sub-pixel 10 can also be a blue sub-pixel or a green sub-pixel, and accordingly, the colors corresponding to the second color sub-pixel 20 and the third color sub-pixel will also be adjusted accordingly.

[0068] For the sake of brevity, the first color sub-pixel 10 and the second color sub-pixel 20 will be introduced in detail below. Specifically, the first color sub-pixel 10 can include a first light-emitting element. The second color sub-pixel 20 can include a second light-emitting element. The first light-emitting element and the second light-emitting element can be an organic light-emitting diode (OLED) or other light-emitting devices, and the present application does not make specific limitation thereto.

[0069] The specific sub-pixel structure can be referred to Figure 2 , Figure 2 The structure of the sub-pixel provided by the embodiment of the present application is shown. As shown in Figure 2 The sub-pixel can be the first color sub-pixel 10, the second color sub-pixel 20, or the third color sub-pixel 30, and the present application does not make specific limitation thereto. The sub-pixel includes a light-emitting element D.

[0070] In the field of display panel technology, the sub-pixel can further include a pixel circuit for driving the light emitting element D to emit light, which generally includes a driving transistor as shown in the dashed box. The first end of the driving transistor in the pixel circuit is electrically connected to the positive power voltage signal line Vdd, the second end of the driving transistor is electrically connected to the anode of the light emitting element D, and the cathode of the light emitting element D is electrically connected to the negative power voltage signal line VSS.

[0071] In the embodiments of the present application, the display driving module can be used to control the voltage difference between the anode and the cathode of the first light emitting element in the first color sub-pixel 10 to be a first voltage difference in the target stage. In addition, the voltage difference between the anode and the cathode of the second light emitting element in the second color sub-pixel 20 is controlled to be a second voltage difference.

[0072] The values of the first voltage difference and the second voltage difference need to meet a preset condition. The preset condition can specifically include that under the action of the first voltage difference, the first frame brightness ratio of the first color sub-pixel 10 is a first first frame brightness ratio; under the action of the second voltage difference, the first frame brightness ratio of the second color sub-pixel 20 is a second first frame brightness ratio; and the difference between the first first frame brightness ratio and the second first frame brightness ratio is less than a preset threshold.

[0073] It should be noted that the preset threshold can be flexibly set according to the specific display index and actual production demand of the manufacturer. Generally, the smaller the preset threshold, the more consistent the first first frame brightness ratio and the second first frame brightness ratio, and the less likely the display panel to have a ghosting color deviation problem.

[0074] The target stage can be an anode initialization stage of the pixel circuit. In this stage, the anode of the light emitting element is usually initialized, and the charge amount of the related parasitic capacitance is pre-charged during the initialization process. Alternatively, in some other embodiments, the target stage can also be other working stages, which are not limited in the present application.

[0075] By controlling the values of the voltage difference between the anode and the cathode of the light emitting element in the first color sub-pixel 10 and the second color sub-pixel 20 in the target stage, the first color sub-pixel 10 and the second color sub-pixel 20 can be driven by the respective voltage differences, so that the difference between the first first frame brightness ratio of the first color sub-pixel 10 and the second first frame brightness ratio of the second color sub-pixel 20 can be less than the preset threshold, or even consistent, thereby effectively improving the display effect of the display panel.

[0076] The first-frame brightness ratio is a ratio of a brightness of a first frame to a maximum brightness / average brightness of multiple frames after stabilization when a picture displayed by the display panel is switched from a black picture to a target gray-scale picture of a target color. Specifically, the first-frame brightness ratio can be a ratio of a brightness of a first frame to a maximum brightness of multiple frames after stabilization when a picture displayed by the display panel is switched from a black picture to a target gray-scale picture of a target color. Alternatively, the first-frame brightness ratio can be a ratio of a brightness of a first frame to an average brightness of multiple frames after stabilization when a picture displayed by the display panel is switched from a black picture to a target gray-scale picture of a target color, which is not limited in the present application and can be determined according to actual needs of a relevant technical person. The target color can include at least a first color or a second color. In other embodiments, the target color can also be a third color.

[0077] Specifically, in the current display technology field, a first-frame brightness ratio (FFR) can be used to measure the ghost color deviation phenomenon of the display panel. As an example, for a red sub-pixel, the concept of the first-frame brightness ratio can be that, when a picture displayed by the display panel is switched from a black picture to a target gray-scale picture of a red color (single color), a ratio of a brightness of a first frame to a maximum brightness / average brightness of multiple frames after stabilization.

[0078] The target gray-scale picture can be switched from L0 to L255, or can be switched from L0 to L100, and the target gray-scale is not limited in the present application.

[0079] In order to better understand the definition of the first-frame brightness ratio in the present application, please refer to the following Figure 3 , Figure 3 is a schematic diagram of a definition of a first-frame brightness ratio provided by an embodiment of the present application. As shown in Figure 3 , for a red sub-pixel, the first-frame brightness ratio is a ratio of a brightness of a first frame to an average value or a maximum value of a brightness of a subsequent stable frame when a picture displayed in the display panel is switched from a black picture to a single-color picture of a red color.

[0080] It should be noted that, for the sake of simplicity, the first color sub-pixel 10 and the second color sub-pixel 20 are only introduced in the present application, but actually, the working process of the third color sub-pixel 30 is similar to that of the first color sub-pixel 10 and the second color sub-pixel 20.

[0081] Specifically, the third color sub-pixel 30 includes a third light emitting element, in the target stage, the voltage difference between the anode and the cathode of the third light emitting element is a third voltage difference; under the action of the third voltage difference, the first frame brightness ratio of the third color sub-pixel is a third first frame brightness ratio; wherein the difference between any two of the first first frame brightness ratio, the second first frame brightness ratio and the third first frame brightness ratio is less than a preset threshold.

[0082] The display device 1000 provided by the embodiment of the present application sets the voltage difference between the anode and the cathode of the first light emitting element as a first voltage difference and the voltage difference between the anode and the cathode of the second light emitting element as a second voltage difference in the target stage; under the action of the first voltage difference, the first frame brightness ratio of the first color sub-pixel 10 is a first first frame brightness ratio; under the action of the second voltage difference, the first frame brightness ratio of the second color sub-pixel 20 is a second first frame brightness ratio; the difference between the first first frame brightness ratio and the second first frame brightness ratio is less than a preset threshold. The display device provided by the embodiment of the present application can control the first frame brightness ratios of different color sub-pixels to be consistent by adjusting the voltage difference between the anode and the cathode of the light emitting element of different color sub-pixels, which can effectively improve the ghosting and color deviation problem of the display panel and improve the display effect of the display panel.

[0083] In some more specific embodiments, in order to more reasonably control the voltage difference between the cathode and the anode of the light emitting element, the cathode of the light emitting element can be controlled in a region-by-region manner, so as to realize different cathode voltages for light emitting elements in different regions. Based on this, please see the following Figure 4 , Figure 4 is a structural schematic diagram of a display panel provided by the embodiment of the present application. As Figure 4 indicated, in the display device 1000, the following can be included:

[0084] The cathode of the first light emitting element is electrically connected with a first power voltage signal line VSS1 and is used to receive a first power voltage signal provided by the first power voltage signal line VSS1. The cathode of the second light emitting element is electrically connected with a second power voltage signal line VSS2 and is used to receive a second power voltage signal provided by the second power voltage signal line VSS2.

[0085] Under the action of the first power voltage signal and the second power voltage signal, the values of the first voltage difference and the second voltage difference satisfy a preset condition, and the difference between the first first frame brightness ratio and the second first frame brightness ratio is less than a preset threshold.

[0086] In the embodiment, the first power voltage signal and the second power voltage signal can be pre-burned into the display driving chip. When the first color sub-pixel 10 and the second color sub-pixel 20 are in the target stage, the display driving chip provides the first power voltage signal to the first power voltage signal line VSS1 and provides the second power voltage signal to the second power voltage signal line VSS2, respectively.

[0087] It should be noted that in the present application, the first power voltage signal line VSS1 can not only provide the first power voltage signal in the target stage, but can always provide the first power voltage signal during display operation, which serves as the cathode voltage of the first light emitting element.

[0088] Similarly, the second power voltage signal line VSS2 can also always provide the second power voltage signal during display operation, and is not limited to the target stage.

[0089] It should be noted that, Figure 4 The third color sub-pixel 30 shown in FIG. 3 includes a third light emitting element, and the cathode of the third light emitting element is electrically connected to the third power voltage signal line VSS3 for receiving the third power voltage signal provided by the third power voltage signal line VSS3. Under the action of the first power voltage signal, the second power voltage signal and the third power voltage signal, the difference between any two of the first first-frame brightness ratio, the second first-frame brightness ratio and the third first-frame brightness ratio is less than a preset threshold.

[0090] In order to facilitate understanding of the structure of the cathode of each color sub-pixel being separately powered in the present application, the first color sub-pixel 10 will be briefly introduced below. Please refer to Figure 5 , Figure 5 FIG. 1 is a structural schematic diagram of a first color sub-pixel according to an embodiment of the present application. As shown in FIG. 1, the cathode of the first light emitting element D1 in the first color sub-pixel 10 is electrically connected to the first power voltage signal line VSS1. Figure 5

[0091] It should be understood that the structures of the second color sub-pixel 20 and the third color sub-pixel 30 are similar to that of the first color sub-pixel 10, and the difference lies in that the cathodes of the light emitting elements in the sub-pixels of different colors are connected to cathode power voltage signal lines which are independent of each other, and the present application does not make specific limitations thereon.

[0092] In some more specific embodiments, further, the first-frame brightness ratios of the first color sub-pixel 10 and the second color sub-pixel 20 are controlled in the embodiments of the present application, and correspondingly, in combination with the actual display situation, the color displayed by the third color sub-pixel 30 can be specifically blue.

[0093] ​Specifically, when the third color sub-pixel 30 is a blue color sub-pixel, since the proportion of the primary color in the white light configuration is very low, the display effect of the display screen is less affected. Then, in order to reduce the resource consumption and cost in display production, the first color sub-pixel 10 and the second color sub-pixel 20 which have a large proportion in the white light configuration can be selected to control and adjust the voltage difference between the anode and cathode of the light emitting element, and the driving scheme of the existing third color sub-pixel 30 is maintained.

[0094] Of course, in some other possible embodiments, the first color sub-pixel 10, the second color sub-pixel 20 and the third color sub-pixel 30 can all be adjusted, so that the first frame brightness proportion of any two of the three is less than the preset threshold, and the present application does not make specific limitations.

[0095] In some more specific embodiments, further, if the voltage difference between the anode and cathode of the first light emitting element and the voltage difference between the anode and cathode of the second light emitting element are consistent at the target stage, the first frame brightness proportion of the first color sub-pixel 10 is greater than the first frame brightness proportion of the second color sub-pixel 20.

[0096] If the anode voltage of the first light emitting element and the anode voltage of the second light emitting element are consistent at the target stage, the voltage value of the first power voltage signal is greater than the voltage value of the second power voltage signal, so that the difference between the first first frame brightness proportion and the second first frame brightness proportion is less than the preset threshold.

[0097] Specifically, if the first frame brightness proportion of the first color sub-pixel 10 is greater than the first frame brightness proportion of the second color sub-pixel 20 when the voltage difference between the anode and cathode of the first light emitting element and the voltage difference between the anode and cathode of the second light emitting element are consistent at the target stage, it indicates that the second color sub-pixel 20 needs to be pre-charged more at the target stage, and the first color sub-pixel 10 needs to be pre-charged less at the target stage.

[0098] On this basis, if the anode voltage of the first light emitting element and the anode voltage of the second light emitting element are consistent at the target stage, in order to make the difference between the first first frame brightness proportion and the second first frame brightness proportion less than the preset threshold, the cathode voltage of the first light emitting element in the first color sub-pixel 10 needs to be increased, or / and the cathode voltage of the second light emitting element in the second color sub-pixel 20 needs to be reduced under the premise that the cathode voltage is consistent in the prior art.

[0099] In this way, the first power voltage signal and the second power voltage signal whose difference between the first first frame brightness proportion and the second first frame brightness proportion is less than the preset threshold will actually have a certain size relationship between the voltage values, that is, the voltage value of the first power voltage signal is greater than the voltage value of the second power voltage signal.

[0100] In some more specific embodiments, further, the parasitic capacitance of the first light emitting element in the first color sub-pixel 10 has a capacitance value smaller than the parasitic capacitance of the second light emitting element in the second color sub-pixel 20.

[0101] Specifically, if, at the target stage, the first color sub-pixel 10 has a first-frame brightness ratio greater than the second color sub-pixel 20 in the case that the voltage difference between the anode and the cathode of the first light emitting element and the second light emitting element is consistent, it reflects that the second color sub-pixel 20 needs to pre-charge more charge at the target stage, indicating that the capacitance value of the parasitic capacitance that needs to be pre-charged is relatively large.

[0102] In contrast, the first color sub-pixel 10 has a first-frame brightness ratio, which reflects that the first color sub-pixel 10 needs to pre-charge less charge at the target stage, indicating that the capacitance value of the parasitic capacitance that needs to be pre-charged is small.

[0103] In some more specific embodiments, the third color sub-pixel 30 can include a third light emitting element, the cathode of the third light emitting element is electrically connected with the third power voltage signal line VSS3, and is used to receive the third power voltage signal provided by the third power voltage signal line VSS3; under the action of the third power voltage signal, the first-frame brightness ratio of the third color sub-pixel 30 is a third first-frame brightness ratio.

[0104] Among any two of the first first-frame brightness ratio, the second first-frame brightness ratio and the third first-frame brightness ratio, the difference is less than a preset threshold value.

[0105] In some more specific embodiments, further, at the target stage, in the case that the voltage difference between the anode and the cathode of the first light emitting element, the voltage difference between the anode and the cathode of the second light emitting element and the voltage difference between the anode and the cathode of the third light emitting element are consistent, the first color sub-pixel 10 has a first-frame brightness ratio greater than the third color sub-pixel 30, and the third color sub-pixel 30 has a first-frame brightness ratio greater than the second color sub-pixel 20.

[0106] If the anode voltages of the first light emitting element, the second light emitting element and the third light emitting element are consistent at the target stage, the voltage value of the first power voltage signal is greater than the voltage value of the third power voltage signal, and the voltage value of the third power voltage signal is greater than the voltage value of the second power voltage signal, so that the difference between any two of the first first-frame brightness ratio, the second first-frame brightness ratio and the third first-frame brightness ratio is less than a preset threshold value.

[0107] Specifically, if the voltage difference between the anode and the cathode of the first light emitting element, the second light emitting element and the third light emitting element is consistent at the target stage, i.e., the voltage difference between the anode and the cathode of the first light emitting element, the second light emitting element and the third light emitting element is equal, the first-frame brightness ratio of the first color sub-pixel 10 is greater than the first-frame brightness ratio of the third color sub-pixel 30, and the first-frame brightness ratio of the third color sub-pixel 30 is greater than the first-frame brightness ratio of the second color sub-pixel 20, it indicates that the second color sub-pixel 20 needs to be pre-charged with the largest amount of charge at the target stage, the first color sub-pixel 10 needs to be pre-charged with the least amount of charge at the target stage, and the third color sub-pixel 30 needs to be pre-charged with an amount of charge between the two.

[0108] On this basis, if the anode voltage of the first light emitting element and the second light emitting element is consistent at the target stage, and the difference between any two of the first first-frame brightness ratio, the second first-frame brightness ratio and the third first-frame brightness ratio is less than a preset threshold, then under the premise that the cathode voltage of each color sub-pixel is consistent in the prior art, the voltage value of the first power supply voltage signal needs to be greater than the voltage value of the third power supply voltage signal, and the voltage value of the third power supply voltage signal needs to be greater than the voltage value of the second power supply voltage signal.

[0109] In some more specific embodiments, more specifically, the parasitic capacitance of the first light emitting element in the first color sub-pixel 10 has a smaller capacitance value than the parasitic capacitance of the third light emitting element in the third color sub-pixel 30, and the parasitic capacitance of the third light emitting element in the third color sub-pixel 30 has a smaller capacitance value than the capacitance of the second light emitting element in the second color sub-pixel 20.

[0110] Specifically, if the voltage difference between the anode and the cathode of the first light emitting element, the second light emitting element and the third light emitting element is consistent at the target stage, the first-frame brightness ratio of the first color sub-pixel 10 is greater than the first-frame brightness ratio of the third color sub-pixel 30, and the first-frame brightness ratio of the third color sub-pixel 30 is greater than the first-frame brightness ratio of the second color sub-pixel 20, it reflects that the second color sub-pixel 20 needs to be pre-charged with a larger amount of charge at the target stage, and indicates that the capacitance value of the parasitic capacitance that needs to be pre-charged is relatively large among the three.

[0111] In contrast, the first color sub-pixel 10 has a large first frame brightness ratio, which means that the first color sub-pixel 10 needs to be pre-charged with a small amount of charge at the target stage, and the parasitic capacitance that needs to be pre-charged has a relatively small capacitance value among the three. The third color sub-pixel 30 has a first frame brightness ratio between the first color sub-pixel 10 and the second color sub-pixel 30, which means that the third color sub-pixel 30 needs to be pre-charged with an amount of charge between the first color sub-pixel 10 and the second color sub-pixel 30 at the target stage, and the parasitic capacitance that needs to be pre-charged has a capacitance value between the three.

[0112] In some more specific embodiments, in order to more reasonably determine the voltage values of the first power supply voltage signal and the second power supply voltage signal to sufficiently ensure that the difference between the first first frame brightness ratio and the second first frame brightness ratio corresponding to the first color sub-pixel 10 and the second color sub-pixel 20 is less than a predetermined threshold value or even tends to be consistent, the voltage value of the first power supply voltage signal and the voltage value of the second power supply voltage signal are determined based on a target operation. The target operation can specifically include the following steps:

[0113] In the case where the voltage value of the power supply voltage signal provided by the first power supply voltage signal line VSS1 is the first voltage, the first alpha first frame brightness ratio of the first color sub-pixel 10 is determined.

[0114] In the case where the voltage value of the power supply voltage signal provided by the second power supply voltage signal line VSS2 is the second voltage, the second alpha first frame brightness ratio of the second color sub-pixel 20 is determined.

[0115] In the case where the voltage value of the power supply voltage signal provided by the second power supply voltage signal line VSS2 is the third voltage, the second beta first frame brightness ratio of the second color sub-pixel 20 is determined.

[0116] Based on the first voltage, the voltage value of the first power supply voltage signal is determined.

[0117] Based on the first voltage, the second voltage, the third voltage, the first alpha first frame brightness ratio, the second alpha first frame brightness ratio, and the second beta first frame brightness ratio, the voltage value of the second power supply voltage signal is determined.

[0118] Exemplarily, in the embodiment, the first color sub-pixel 10 is determined based on the voltage value of the power supply voltage signal provided by the first power supply voltage signal line VSS1. When the voltage value of the power supply voltage signal provided by the second power supply voltage signal line VSS2 is the second voltage, the second color sub-pixel 20 is determined based on the second voltage. When the voltage value of the power supply voltage signal provided by the second power supply voltage signal line VSS2 is the third voltage, the second color sub-pixel 20 is determined based on the second voltage. It should be understood that the above steps do not have a strict order of execution. The application does not limit the order of execution of the specific steps for determining the first voltage, the second voltage, and the third voltage.

[0119] Based on this, the voltage value of the first power supply voltage signal is determined based on the first voltage. For example, the first voltage can be directly determined as the voltage value of the first power supply voltage signal, or the voltage value of the first power supply voltage signal can be obtained after adjusting the corresponding parameters based on the first voltage. The application does not limit this.

[0120] In addition, the voltage value of the second power supply voltage signal is determined based on the first voltage, the second voltage, the third voltage, the first color sub-pixel brightness ratio, the second color sub-pixel brightness ratio, and the second color sub-pixel brightness ratio. In the embodiment, considering the diversity and complexity of the current mathematical processing means, the specific operation process of the above-mentioned parameters is not described in detail.

[0121] It should be noted that the values of the first voltage and the second voltage in the embodiment can be the same or different, and the values of the first voltage and the third voltage can be the same or different. The application does not limit this. In addition, the value of the first voltage can be set by the commonly used cathode voltage data of the light emitting element in the current display panel, and the value of the second voltage is different from the third voltage.

[0122] In some more specific embodiments, in order to more accurately determine the voltage values of the first power supply voltage signal and the second power supply voltage signal, and more fully improve the ghost color cast problem existing in the display panel, the determination of the first power supply voltage signal based on the first voltage can include:

[0123] The first voltage is determined as the voltage value of the first power supply voltage signal;

[0124] The voltage value of the second power supply voltage signal is determined based on the first voltage, the second voltage, the third voltage, the first color sub-pixel brightness ratio, the second color sub-pixel brightness ratio, and the second color sub-pixel brightness ratio. In the embodiment, considering the diversity and complexity of the current mathematical processing means, the specific operation process of the above-mentioned parameters is not described in detail.

[0125] determine the target coefficient according to a difference between the first-frame-brightness-ratio-of-second-A and the first-frame-brightness-ratio-of-second-B, and a difference between the second voltage and the third voltage;

[0126] determine the voltage value of the second power voltage signal based on the target coefficient, the first-frame-brightness-ratio-of-second-B, and target data; the target data is a combination of the second voltage and the first-frame-brightness-ratio-of-second-A, or the target data is a combination of the third voltage and the first-frame-brightness-ratio-of-second-B.

[0127] In some more specific embodiments, further, the above-mentioned determining the target coefficient according to a difference between the first-frame-brightness-ratio-of-second-A and the first-frame-brightness-ratio-of-second-B, and a difference between the second voltage and the third voltage, specifically can include:

[0128] taking a ratio of the first difference and the second difference as the target coefficient; the first difference is the difference between the first-frame-brightness-ratio-of-second-A and the first-frame-brightness-ratio-of-second-B, and the second difference is the difference between the second voltage and the third voltage.

[0129] In some more specific embodiments, the target coefficient is calculated based on a first relationship;

[0130] The above-mentioned first relationship can be:

[0131] x = (FFR_b2-FFR_b1) / (V3-V2);

[0132] wherein x is the target coefficient, V2 is the second voltage, V3 is the third voltage, FFR_b1 is the first-frame-brightness-ratio-of-second-A, and FFR_b2 is the first-frame-brightness-ratio-of-second-B.

[0133] The above-mentioned determining the voltage value of the second power voltage signal based on the target coefficient, the first-frame-brightness-ratio-of-second-B, and target data, can include:

[0134] calculating the voltage value of the second power voltage signal according to a second relationship or a third relationship;

[0135] The above-mentioned second relationship can be:

[0136] VSS_2 = V3 + (FFR_b2-FFR_a1) / x;

[0137] wherein VSS_2 is the voltage value of the second power voltage signal, FFR_a1 is the first-frame-brightness-ratio-of-first-A,

[0138] The above-mentioned third relationship can be:

[0139] VSS_2 = V2 + (FFR_b1-FFR_a1) / x.

[0140] It needs to be supplemented that, in the embodiment, when the voltage values of the first power voltage signal and the second power voltage signal are determined, the first voltage is directly taken as the voltage value of the first power voltage signal, and the voltage value (the second voltage, the third voltage) provided by the second power voltage signal line VSS2 of the second color sub-pixel 20 is adjusted to comprehensively calculate the voltage value of the second power voltage signal.

[0141] But in fact, it can also be that the voltage provided by the second power voltage signal line VSS2 of the second color sub-pixel 20 is unchanged (for example, always the second voltage, which is directly taken as the voltage value of the second power voltage signal), and the voltage value of the power voltage signal provided by the first power voltage signal line VSS1 of the first color pixel 10 is adjusted to measure the first-frame brightness ratio before and after the adjustment, and finally calculate the voltage value of the first power voltage signal according to the corresponding parameters involved in the above embodiment.

[0142] And correspondingly, the calculation method of the third power voltage signal corresponding to the third color sub-pixel 30 is similar to the calculation method of the voltage value of the second power voltage signal in the above embodiment, and for the sake of brevity, the present application will not be expanded one by one here.

[0143] In some more specific embodiments, in order to more reasonably realize the control of the voltage difference between the cathode and the anode of the light-emitting element, in addition to the control of the cathode of the light-emitting element by region, the control of the anode voltage of the light-emitting element in the target stage by region can also be considered, so that different anode voltages are given to the light-emitting elements under different color sub-pixels to realize. Based on this, in the target stage, when the voltage difference between the anode and the cathode of the first light-emitting element is consistent with the voltage difference between the anode and the cathode of the second light-emitting element, the first-frame brightness ratio of the first color sub-pixel 10 is greater than the first-frame brightness ratio of the second color sub-pixel 20;

[0144] The first color sub-pixel 10 can further include a first anode initialization module, and the second color sub-pixel 20 can further include a second anode initialization module;

[0145] The first end of the first anode initialization module is electrically connected with the first reference level voltage end, and the second end of the first anode initialization module is electrically connected with the anode of the first light-emitting element, for providing the first reference level voltage signal provided by the first reference level voltage end to the anode of the first light-emitting element to initialize the anode of the first light-emitting element in the target stage;

[0146] The first end of the second anode initialization module is electrically connected with the second reference level voltage end, and the second end of the second anode initialization module is electrically connected with the anode of the second light emitting element, for providing the second reference level voltage signal provided by the second reference level voltage end to the anode of the second light emitting element to initialize the anode of the second light emitting element in the target stage.

[0147] If the cathode voltages of the first light emitting element and the second light emitting element are consistent in the target stage, the voltage value of the first reference level voltage signal is less than the voltage value of the second reference level voltage signal, so that the difference between the first first-frame brightness ratio and the second first-frame brightness ratio is less than the preset threshold.

[0148] In the embodiment, the target stage can be specifically an anode initialization stage of a frame in the pixel circuit. Specifically, in the embodiment, a premise is given first: in the case that the voltage difference between the anode and the cathode of the first light emitting element is consistent with the voltage difference between the anode and the cathode of the second light emitting element, the first-frame brightness ratio of the first color sub-pixel 10 is greater than the first-frame brightness ratio of the second color sub-pixel 20. This means that actually, the amount of charge needed to be pre-charged in the target stage in the second color sub-pixel 20 is more, and the amount of charge needed to be pre-charged in the target stage in the first color sub-pixel 10 is less.

[0149] Based on this, if the cathode voltages of the first light emitting element and the second light emitting element are consistent in the target stage, then the difference between the first first-frame brightness ratio and the second first-frame brightness ratio can be made to be less than the preset threshold by adjusting the anode voltages of the first light emitting element and the second light emitting element in the target stage. Specifically, if the cathode voltages of the first light emitting element and the second light emitting element are consistent in the target stage, the voltage value of the first reference level voltage signal finally output in the target stage is less than the voltage value of the second reference level voltage signal, so that the difference between the first first-frame brightness ratio and the second first-frame brightness ratio is less than the preset threshold.

[0150] The structure of the first color sub-pixel 10 will be specifically described below. Please refer to Figure 6 , Figure 6 is another structure diagram of the first color sub-pixel provided by the embodiment of the present application. As shown in Figure 6 , in the first color sub-pixel 10, the first anode initialization module can be a seventh transistor T7, the first end of the seventh transistor T7 is electrically connected with the first reference level voltage end Vref2, and the second end of the seventh transistor T7 is electrically connected with the anode of the first light emitting element D1.

[0151] In the target stage, the first reference level voltage signal provided by the first reference level voltage terminal Vref2 is transmitted to the anode of the first light emitting element D1 to initialize the anode of the first light emitting element D1 in the case that the seventh transistor T7 is turned on. The structures of the second color sub-pixel 20 and the third color sub-pixel 30 are similar to those shown in the structure, and for brevity, the present application does not expand on this. Figure 6

[0152] In the embodiment, by distinguishing the anode voltage of the light emitting element in the target stage in different color sub-pixels, it is ensured that the difference between the first frame brightness ratios of different color sub-pixels is less than a preset threshold value, or even tends to be consistent, thereby effectively solving the ghost color cast problem in the display panel and fully improving the display effect of the display panel.

[0153] In some more specific embodiments, the anode voltage and the cathode voltage of the light emitting element in the target stage of different color sub-pixels can be simultaneously controlled and set to control the voltage difference between the cathode and the anode of the light emitting element in different color sub-pixels, so that the first frame brightness ratios of different color sub-pixels can tend to be consistent as much as possible, thereby fully improving the ghost color cast problem of the existing display panel.

[0154] It should be noted that, Figure 7 is another structure diagram of a sub-pixel provided by the embodiment of the present application. In the present application, each color sub-pixel can be driven and displayed by the 7T1C pixel circuit as shown in Figure 7 In view of the wide application of the related 7T1C pixel circuit, the specific device composition and the connection relationship between the devices in the pixel driving circuit can be as shown in Figure 7 The present application does not make a specific description.

[0155] In addition, it should be understood that in some other embodiments, other pixel circuits can also be used for display driving in each color sub-pixel in the present application, for example, 8T1C, 7T2C pixel circuits are also feasible, and the present application does not make strict restrictions.

[0156] Based on the same technical concept as the display device in the above embodiment, correspondingly, the present application also provides a driving method of a display device corresponding to the above display device, which includes a display panel, and the display panel includes a plurality of first color sub-pixels, a plurality of second color sub-pixels and a plurality of third color sub-pixels; the first color sub-pixel includes a first light emitting element; and the second color sub-pixel includes a second light emitting element. The driving method of the display device of the embodiment of the present application is described in detail as follows. Figure 8 The driving method of the display device of the embodiment of the present application is described in detail as follows.

[0157] ​Figure 8 A flowchart of a driving method of a display device provided by an embodiment of the present application is shown. As shown in the figure, the driving method of the display device can specifically include the following steps: Figure 8

[0158] S810, in the target stage, the voltage difference between the anode and the cathode of the first light emitting element is controlled to be a first voltage difference;

[0159] S820, the voltage difference between the anode and the cathode of the second light emitting element is controlled to be a second voltage difference; the values of the first voltage difference and the second voltage difference meet a preset condition, and the preset condition includes: under the action of the first voltage difference, the first-frame brightness ratio of the first color sub-pixel is a first first-frame brightness ratio; under the action of the second voltage difference, the first-frame brightness ratio of the second color sub-pixel is a second first-frame brightness ratio; wherein the difference between the first first-frame brightness ratio and the second first-frame brightness ratio is less than a preset threshold.

[0160] The specific implementation of the above steps 810 to 820 is described in detail below.

[0161] In specific implementation, by controlling the value of the voltage difference between the anode and the cathode of the light emitting element in the target stage in the first color sub-pixel and the second color sub-pixel, the first color sub-pixel and the second color sub-pixel can be under the action of the respective voltage difference, and the difference between the first-frame brightness ratio of the first color sub-pixel and the first-frame brightness ratio of the second color sub-pixel can be less than the preset threshold, or even tend to be consistent.

[0162] It should be noted that the above-mentioned preset threshold can be flexibly set according to the specific display index and actual production demand of the manufacturer.

[0163] The above-mentioned target stage can be specifically the anode initialization stage of a frame in the pixel circuit. In this stage, the anode of the light emitting element is usually initialized, and the charge amount of the related parasitic capacitance is pre-charged during the initialization process. Alternatively, in other some embodiments, the above-mentioned target stage can also be other working stages, and the present application does not make specific limitation thereto.

[0164] ​The embodiment of the present application provides a display device driving method, by setting the voltage difference between the anode and the cathode of the first light emitting element as a first voltage difference, and the voltage difference between the anode and the cathode of the second light emitting element as a second voltage difference in a target stage; and under the action of the first voltage difference, the first frame brightness ratio of the first color sub-pixel is a first first frame brightness ratio; under the action of the second voltage difference, the first frame brightness ratio of the second color sub-pixel is a second first frame brightness ratio; the difference between the first first frame brightness ratio and the second first frame brightness ratio is less than a preset threshold. The display device driving method of the embodiment of the present application can effectively improve the display panel trailing color problem and improve the display effect of the display panel by adjusting the voltage difference between the anode and the cathode of the light emitting element of different color sub-pixels to control the first frame brightness ratio of different color sub-pixels to be consistent.

[0165] Please see Figure 9 , Figure 9 is a flow diagram of another display device driving method provided by the embodiment of the present application. As shown in Figure 9 , as another implementation manner of the present application, optionally, in order to more reasonably control the voltage difference between the cathode and the anode of the light emitting element, the cathode of the light emitting element can be controlled in a region, so that different cathode voltages are provided for the light emitting elements in different regions. Based on this, the cathode of the first light emitting element is electrically connected with the first power voltage signal line; the cathode of the second light emitting element is electrically connected with the second power voltage signal line; the driving method can further include steps 910 and 920. The above S810 can be replaced by step 910 in Figure 9 , and the above S820 can be replaced by step 920 in Figure 9 .

[0166] S910, controlling the first power voltage signal line to provide a first power voltage signal, so that the voltage difference between the anode and the cathode of the first light emitting element is a first voltage difference;

[0167] S920, controlling the second power voltage signal line to provide a second power voltage signal, so that the voltage difference between the anode and the cathode of the second light emitting element is a second voltage difference; wherein under the action of the first power voltage signal and the second power voltage signal, the values of the first voltage difference and the second voltage difference satisfy a preset condition, and the difference between the first first frame brightness ratio and the second first frame brightness ratio is less than a preset threshold.

[0168] In the embodiment, the above first power voltage signal and second power voltage signal can be pre-burned into the display driving chip. When the first color sub-pixel and the second color sub-pixel are in the target stage, the display driving chip controls the first power voltage signal line to provide the first power voltage signal and controls the second power voltage signal line to provide the second power voltage signal, respectively.

[0169] It should be noted that in the present application, the first power voltage signal line can not only provide the first power voltage signal in the target stage, but can also always provide the first power voltage signal during display operation as the cathode voltage of the first light emitting element, and the present application does not make specific limitations thereto. Similarly, the second power voltage signal line can also always provide the second power voltage signal during display operation, and is not limited to the target stage.

[0170] In some more specific embodiments, further, in the target stage, in the case where the voltage difference between the anode and the cathode of the first light emitting element is consistent with the voltage difference between the anode and the cathode of the second light emitting element, the first color sub-pixel has a first frame brightness ratio greater than that of the second color sub-pixel; the driving method of the display device can further comprise:

[0171] If the anode voltages of the first light emitting element and the second light emitting element are consistent in the target stage, the voltage value of the first power voltage signal is greater than that of the second power voltage signal, so that the difference between the first first frame brightness ratio and the second first frame brightness ratio is less than a preset threshold value.

[0172] Specifically, if in the target stage, in the case where the voltage difference between the anode and the cathode of the first light emitting element and the second light emitting element is consistent, the first color sub-pixel has a first frame brightness ratio greater than that of the second color sub-pixel, it indicates that the second color sub-pixel needs to be pre-charged more in the target stage, and the first color sub-pixel needs to be pre-charged less in the target stage.

[0173] On this basis, in the case where the anode voltages of the first light emitting element and the second light emitting element are consistent in the target stage, if the difference between the first first frame brightness ratio and the second first frame brightness ratio is to be less than a preset threshold value, under the premise that the cathode voltages are consistent in the prior art, the cathode voltage of the first light emitting element in the first color sub-pixel needs to be increased, or / and, the cathode voltage of the second light emitting element in the second color sub-pixel needs to be reduced.

[0174] In this way, by making the voltage value of the first power voltage signal greater than that of the second power voltage signal, the difference between the first first frame brightness ratio and the second first frame brightness ratio can ultimately be less than a preset threshold value.

[0175] In some more specific embodiments, further, in the present application, the first color sub-pixel and the second color sub-pixel are mainly controlled in the first frame brightness ratio, and accordingly, in combination with the actual display situation, the color displayed by the third color sub-pixel can be specifically blue.

[0176] Specifically, when the third color sub-pixel is a blue color sub-pixel, since the proportion of the primary color in the white light configuration is very low, the display effect of the display screen is correspondingly less affected. Then, in order to reduce resource consumption and cost in display production, the first color sub-pixel and the second color sub-pixel with a large proportion in the white light configuration can be selected for control and adjustment of the anode-cathode voltage difference of the light emitting element, and the existing driving scheme of the third color sub-pixel is maintained.

[0177] Of course, in some other possible implementations, the first color sub-pixel, the second color sub-pixel, and the third color sub-pixel can all be adjusted so that the first-frame brightness proportion of any two of the three is less than the preset threshold, and the present application does not make specific limitations in this regard.

[0178] Please refer to the following Figure 10 , Figure 10 is a flowchart of another driving method of a display device provided by an embodiment of the present application. As shown in Figure 10 , in order to more reasonably determine the voltage values of the first power supply voltage signal and the second power supply voltage signal to sufficiently ensure that the difference between the first first-frame brightness proportion and the second first-frame brightness proportion corresponding to the first color sub-pixel and the second color sub-pixel is less than the preset threshold or even tends to be consistent, according to some embodiments of the present application, before the first power supply voltage signal line is controlled to provide the first power supply voltage signal and the second power supply voltage signal line is controlled to provide the second power supply voltage signal, the driving method of the display device can further include:

[0179] S1010, determining the first alpha first-frame brightness proportion of the first color sub-pixel when the voltage value of the power supply voltage signal provided by the first power supply voltage signal line is the first voltage;

[0180] S1020, determining the second alpha first-frame brightness proportion of the second color sub-pixel when the voltage value of the power supply voltage signal provided by the second power supply voltage signal line is the second voltage;

[0181] S1030, determining the second beta first-frame brightness proportion of the second color sub-pixel when the voltage value of the power supply voltage signal provided by the second power supply voltage signal line is the third voltage;

[0182] S1040, determining the voltage value of the first power supply voltage signal based on the first voltage;

[0183] S1050, determining the voltage value of the second power supply voltage signal based on the first voltage, the second voltage, the third voltage, the first alpha first-frame brightness proportion, the second alpha first-frame brightness proportion, and the second beta first-frame brightness proportion.

[0184] In a specific implementation, in the embodiment, when the voltage value of the power supply voltage signal provided on the first power supply voltage signal line is the first voltage, the first alpha first frame brightness proportion of the first color sub-pixel is determined. When the voltage value of the power supply voltage signal provided on the second power supply voltage signal line is the second voltage, the second alpha first frame brightness proportion of the second color sub-pixel is determined. When the voltage value of the power supply voltage signal provided on the second power supply voltage signal line is the third voltage, the second beta first frame brightness proportion of the second color sub-pixel is determined.

[0185] In this way, the voltage value of the first power supply voltage signal is determined based on the first voltage. For example, the first voltage can be directly determined as the voltage value of the first power supply voltage signal, or the voltage value of the first power supply voltage signal can be obtained after corresponding parameter adjustment based on the first voltage, which is not limited in the present application.

[0186] In addition, the voltage value of the second power supply voltage signal is determined based on the first voltage, the second voltage, the third voltage, the first alpha first frame brightness proportion, the second alpha first frame brightness proportion, and the second beta first frame brightness proportion. In the embodiment, considering the diversity and complexity of the current mathematical processing means, the specific operation and processing process of the above-mentioned parameters are not described in detail.

[0187] It should be understood that the above steps 1010, 1020, and 1030 do not have a strict order when executed. The steps 1010, 1020, and 1030 in the embodiment of the present application Figure 10 are only shown as one possible case of being executed in sequence, and do not have a substantial limiting effect.

[0188] The following Figure 11 , Figure 11 is a flow diagram of another driving method of a display device provided by the embodiment of the present application. As shown in Figure 11 , in order to more accurately determine the voltage values of the first power supply voltage signal and the second power supply voltage signal and more fully improve the ghost color cast problem existing in the display panel, the above S1040, determining the first power supply voltage signal based on the first voltage, can be replaced by step 1041 in Figure 11

[0189] S1041, determining the first voltage as the voltage value of the first power supply voltage signal;

[0190] The above S1050, determining the voltage value of the second power supply voltage signal based on the first voltage, the second voltage, the third voltage, the first alpha first frame brightness proportion, the second alpha first frame brightness proportion, and the second beta first frame brightness proportion, can specifically include Figure 11 ​​​​​​​​S1051, determining a target coefficient according to a difference between the second alpha first frame brightness ratio and the second beta first frame brightness ratio, and a difference between the second voltage and the third voltage;

[0191] S1051, determining a target coefficient according to a difference between the second alpha first frame brightness ratio and the second beta first frame brightness ratio, and a difference between the second voltage and the third voltage;

[0192] S1052, determining a voltage value of the second power voltage signal based on the target coefficient, the second beta first frame brightness ratio and target data; the target data is a combination of the second voltage and the second alpha first frame brightness ratio, or the target data is a combination of the third voltage and the second beta first frame brightness ratio.

[0193] S1051, determining a target coefficient according to a difference between the second alpha first frame brightness ratio and the second beta first frame brightness ratio, and a difference between the second voltage and the third voltage; Figure 12 Figure 12 is a flowchart of another driving method of a display device provided by the embodiments of the present application. As shown in Figure 12 S1051, determining a target coefficient according to a difference between the second alpha first frame brightness ratio and the second beta first frame brightness ratio, and a difference between the second voltage and the third voltage; Figure 12

[0194] S1053, taking a ratio of a first difference value and a second difference value as the target coefficient; the first difference value is a difference between the second alpha first frame brightness ratio and the second beta first frame brightness ratio, and the second difference value is a difference between the second voltage and the third voltage.

[0195] In some more specific embodiments, the target coefficient is calculated based on a first relationship;

[0196] The first relationship can be:

[0197] x = (FFR_b2-FFR_b1) / (V3-V2);

[0198] wherein x is the target coefficient, V2 is the second voltage, V3 is the third voltage, FFR_b1 is the second alpha first frame brightness ratio, and FFR_b2 is the second beta first frame brightness ratio.

[0199] Determining the voltage value of the second power voltage signal based on the target coefficient, the second beta first frame brightness ratio and the target data can include:

[0200] The voltage value of the second power voltage signal is calculated according to a second relationship or a third relationship;

[0201] The second relationship can be:

[0202] VSS_2 = V3 + (FFR_b2-FFR_a1) / x;

[0203] ​​Wherein, VSS_2 is a voltage value of the second power voltage signal, FFR_a1 is a first head frame luminance ratio,

[0204] The third relationship can be:

[0205] VSS_2 = V2 + (FFR_b1 - FFR_a1) / x.

[0206] Based on the display driving method provided in the above embodiments of the present application, a display driving device provided by the present application is introduced as follows. Please refer to Figure 13 , Figure 13 is a structural schematic diagram of the display driving device provided by an embodiment of the present application.

[0207] As shown in Figure 13 , the display driving device can include a processor 1301 and a memory 1302 storing computer program instructions.

[0208] Specifically, the above processor 1301 can include a central processing unit (CPU), or a specific integrated circuit (Application Specific Integrated Circuit, ASIC), or can be configured to implement one or more integrated circuits of the embodiments of the present application.

[0209] The memory 1302 can include a mass storage for data or instructions. By way of example and not limitation, the memory 1302 can 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 1302 can include removable or non-removable (or fixed) media. Where appropriate, the memory 1302 can be internal or external to the integrated gateway disaster recovery device. In a particular embodiment, the memory 1302 is a non-volatile solid-state memory.

[0210] The memory can include read-only memory (ROM), random access memory (RAM), a 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., memory devices) encoded with software including computer-executable instructions that, when executed (e.g., by one or more processors), are operable to perform the operations described with reference to the methods according to an aspect of the present disclosure.

[0211] The processor 1301 implements the display driving method described above by reading and executing computer program instructions stored in the memory 1302.

[0212] In one example, the display driving device can further include a communication interface 1303 and a bus 1310. As shown, the processor 1301, the memory 1302, and the communication interface 1303 are connected by the bus 1310 and complete communication with each other. Figure 13

[0213] The communication interface 1303 is mainly used to realize the communication between the modules, devices, units and / or equipment in the embodiments of the present application.

[0214] The bus 1310 includes hardware, software or both to couple components of the display driving device to each other. By way of example, and not limitation, the bus can include an accelerated graphics port (AGP) or other graphics bus, an enhanced industry standard architecture (EISA) bus, a front-side bus (FSB), a HyperTransport (HT) interconnect, an industry standard architecture (ISA) bus, an InfiniBand (IB) interconnect, a low pin count (LPC) bus, a memory bus, a Micro Channel Architecture (MCA) bus, a peripheral component interconnect (PCI) bus, a PCI-Express (PCI-X) bus, a serial advanced technology attachment (SATA) bus, a video electronics standards association local (VLB) bus, or another suitable bus or a combination of two or more of these. Where appropriate, the bus 1310 can include one or more buses. Although the present application describes and illustrates a particular bus, the present application contemplates any suitable bus or interconnect.

[0215] The display driving device implements the driving method in the embodiments of the present application, thereby realizing the driving method provided in any one or more of the above method embodiments.

[0216] In addition, in combination with the driving method in the above embodiments, the embodiments of the present application can provide a computer readable storage medium to realize. The computer readable storage medium has computer program instructions stored thereon; the computer program instructions are executed by the processor to realize any one of the driving methods in the above embodiments.

[0217] It should be noted that the present application is not limited to the specific configurations and processes described above and shown in the drawings. For the sake of brevity, detailed descriptions of well-known methods are omitted herein. In the above embodiments, several specific steps are described and shown as examples. However, the method processes of the present application are not limited to the specific steps described and shown, and those skilled in the art can make various changes, modifications and additions, or change the order of the steps, after understanding the spirit of the present application.

[0218] ​The functions noted in the description of the structural block diagrams above 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, functional cards, and the like. When implemented in software, the elements of the present application are program or code segments that are used to perform the required tasks. The program or code segments can be stored in a machine-readable medium or transmitted through a data signal carried in a carrier wave over a transmission medium or communication link. A "machine-readable medium" includes any medium that can store or transport information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, fiber optic media, radio frequency (RF) links, and the like. The code segments can be downloaded via computer networks such as the Internet, intranets, and the like.

[0219] It is also important to note that the examples mentioned in the present application describe some methods or systems based on a series of steps or devices. However, the present application is not limited to the order of the steps mentioned above, that is, the steps can be performed in the order mentioned in the examples, or in an order different from the examples, or several steps can be performed simultaneously.

[0220] The computer program instructions can also be loaded onto a computer, other programmable data processing apparatus, or other processing device to cause a series of operational steps to be performed on the computer, other programmable apparatus or other processing device to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide processes for implementing the functions / acts specified in the flowchart and / or block diagram block or blocks. These computer program instructions can also be stored in a computer readable medium that can direct a computer, other programmable data processing apparatus, or other processing device to operate in a particular manner, such that the instructions stored in the computer readable medium produce an article of manufacture including instructions which implement the function / act specified in the flowchart and / or block diagram block or blocks. The computer program instructions can also be loaded onto a computer, other programmable data processing apparatus, or other processing device to cause a series of operational steps to be performed on the computer, other programmable apparatus or other processing device to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide processes for implementing the functions / acts specified in the flowchart and / or block diagram block or blocks. These computer program instructions can also be stored in a computer readable medium that can direct a computer, other programmable data processing apparatus, or other processing device to operate in a particular manner, such that the instructions stored in the computer readable medium produce an article of manufacture including instructions which implement the function / act specified in the flowchart and / or block diagram block or blocks.

[0221] The above describes only specific implementations of the present application. Those skilled in the art can clearly understand the specific working processes of the system, modules and units described above for the convenience and brevity of description, and can refer to the corresponding processes in the foregoing method embodiments, which will not be described here. It should be understood that the protection scope of the present application is not limited thereto, and 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 covered within the protection scope of the present application.

[0222] It should be noted that each of the embodiments in the specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other. Each embodiment focuses on the difference from other embodiments. In accordance with the above-described embodiments of the present application, these embodiments do not describe all the details and do not limit the application to the specific embodiments described. Obviously, many modifications and changes can be made according to the above description. The specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present application, so that those skilled in the art can well utilize the present application and make modifications and uses on the basis of the present application. The present application is limited by the claims and their entire scope and equivalents.

[0223] Those skilled in the art should understand that the above embodiments are exemplary and not limiting. Different technical features appearing in different embodiments can be combined to achieve beneficial effects. Those skilled in the art can understand and implement other changed embodiments of the disclosed embodiments based on the drawings, the specification and the claims. In the claims, the term "comprising" does not exclude other structures; the number of "one" does not exclude multiple; the terms "first", "second" are used to mark names and not to represent any specific order. Any reference signs in the claims should not be understood as limiting the scope of protection. The fact that certain technical features appear in different dependent claims does not mean that these technical features cannot be combined to achieve beneficial effects.

Claims

1. A display device, characterized in that, The display device includes a display panel and a display driving module. The display panel includes a plurality of first color sub-pixels, a plurality of second color sub-pixels, and a plurality of third color sub-pixels. The first color sub-pixel includes a first light-emitting element; the second color sub-pixel includes a second light-emitting element; The display driving module is used to control the voltage difference between the anode and cathode of the first light-emitting element to a first voltage difference during the target stage; and to control the voltage difference between the anode and cathode of the second light-emitting element to a second voltage difference. The values ​​of the first voltage difference and the second voltage difference satisfy preset conditions, which include: under the action of the first voltage difference, the first frame brightness ratio of the first color sub-pixel is the first first frame brightness ratio; under the action of the second voltage difference, the first frame brightness ratio of the second color sub-pixel is the second first frame brightness ratio. Wherein, the difference between the first frame brightness ratio and the second frame brightness ratio is less than a preset threshold; the first frame brightness ratio is the ratio of the brightness of the first frame to the maximum brightness / average brightness of multiple frames after the screen displayed on the display panel switches from a black screen to a target grayscale screen of the target color; the target color includes at least the first color or the second color; the cathode of the first light-emitting element is electrically connected to the first power supply voltage signal line for receiving the first power supply voltage signal provided by the first power supply voltage signal line. The cathode of the second light-emitting element is electrically connected to the second power supply voltage signal line to receive the second power supply voltage signal provided by the second power supply voltage signal line; In the target stage, when the voltage difference between the anode and cathode of the first light-emitting element is the same as the voltage difference between the anode and cathode of the second light-emitting element, the first frame brightness ratio of the first color sub-pixel is greater than the first frame brightness ratio of the second color sub-pixel. If the anode voltages of the first and second light-emitting elements are the same in the target stage, then the voltage value of the first power supply voltage signal is greater than the voltage value of the second power supply voltage signal, so that the difference between the brightness ratio of the first first frame and the brightness ratio of the second first frame is less than the preset threshold; the target stage is the anode initialization stage of a frame in the pixel circuit or the stage when the display is working.

2. The display device according to claim 1, characterized in that, include: Under the action of the first power supply voltage signal and the second power supply voltage signal, the values ​​of the first voltage difference and the second voltage difference satisfy the preset condition, and the difference between the first frame brightness ratio and the second frame brightness ratio is less than the preset threshold.

3. The display device according to claim 1, characterized in that, include: The third color sub-pixel is configured to display the color blue.

4. The display device according to claim 1, characterized in that, The parasitic capacitance value of the first light-emitting element in the first color sub-pixel is less than the parasitic capacitance value of the second light-emitting element in the second color sub-pixel.

5. The display device according to claim 1, characterized in that, The third color sub-pixel includes a third light-emitting element, the cathode of which is electrically connected to a third power supply voltage signal line to receive the third power supply voltage signal provided by the third power supply voltage signal line; under the action of the third power supply voltage signal, the first frame brightness ratio of the third color sub-pixel is the third first frame brightness ratio. Wherein, the difference between any two of the first frame brightness ratio, the second frame brightness ratio, and the third frame brightness ratio is less than the preset threshold.

6. The display device according to claim 5, characterized in that, In the target stage, when the voltage difference between the anode and cathode of the first light-emitting element, the voltage difference between the anode and cathode of the second light-emitting element, and the voltage difference between the anode and cathode of the third light-emitting element are the same, the first frame brightness ratio of the first color sub-pixel is greater than the first frame brightness ratio of the third color sub-pixel, and the first frame brightness ratio of the third color sub-pixel is greater than the first frame brightness ratio of the second color sub-pixel; if the anode voltages of the first light-emitting element, the second light-emitting element, and the third light-emitting element are the same in the target stage, then the voltage value of the first power supply voltage signal is greater than the voltage value of the third power supply voltage signal, and the voltage value of the third power supply voltage signal is greater than the voltage value of the second power supply voltage signal, so that the difference between any two of the first first frame brightness ratio, the second first frame brightness ratio, and the third first frame brightness ratio is less than the preset threshold.

7. The display device according to claim 5 or 6, characterized in that, The parasitic capacitance of the first light-emitting element in the first color sub-pixel is less than the parasitic capacitance of the third light-emitting element in the third color sub-pixel, and the parasitic capacitance of the third light-emitting element in the third color sub-pixel is less than the capacitance of the second light-emitting element in the second color sub-pixel.

8. The display device according to claim 2, characterized in that, The voltage values ​​of the first power supply voltage signal and the second power supply voltage signal are determined based on a target operation; the target operation includes: When the voltage value of the power supply voltage signal provided by the first power supply voltage signal line is the first voltage, the first frame brightness ratio of the first color sub-pixel is determined. When the voltage value of the power supply voltage signal provided by the second power supply voltage signal line is the second voltage, the second first frame brightness ratio of the second color sub-pixel is determined; When the voltage value of the power supply voltage signal provided by the second power supply voltage signal line is the third voltage, the second first frame brightness ratio of the second color sub-pixel is determined; Based on the first voltage, determine the voltage value of the first power supply voltage signal; Based on the first voltage, the second voltage, the third voltage, the brightness ratio of the first A first frame, the brightness ratio of the second A first frame, and the brightness ratio of the second B first frame, the voltage value of the second power supply voltage signal is determined.

9. The display device according to claim 8, characterized in that, Determining the first power supply voltage signal based on the first voltage includes: The first voltage is determined as the voltage value of the first power supply voltage signal; The step of determining the voltage value of the second power supply voltage signal based on the first voltage, the second voltage, the third voltage, the brightness ratio of the first A first frame, the brightness ratio of the second A first frame, and the brightness ratio of the second B first frame includes: The target coefficient is determined based on the difference between the brightness ratio of the first frame of the second A and the brightness ratio of the first frame of the second B, and the difference between the second voltage and the third voltage. Based on the target coefficient, the brightness ratio of the first frame of the second B, and the target data, the voltage value of the second power supply voltage signal is determined; the target data is a combination of the second voltage and the brightness ratio of the first frame of the second A, or the target data is a combination of the third voltage and the brightness ratio of the first frame of the second B.

10. The display device according to claim 9, characterized in that, The step of determining the target coefficient based on the difference between the brightness ratio of the first frame of the second A and the brightness ratio of the first frame of the second B, and the difference between the second voltage and the third voltage, includes: The ratio of the first difference to the second difference is used as the target coefficient; the first difference is the difference between the brightness ratio of the first frame of the second A and the brightness ratio of the first frame of the second B, and the second difference is the difference between the second voltage and the third voltage.

11. The display device according to claim 10, characterized in that, The target coefficients are calculated based on the first relational expression. The first relation is: x=(FFR_b2-FFR_b1) / (V3-V2); Where x is the target coefficient, V2 is the second voltage, V3 is the third voltage, FFR_b1 is the brightness ratio of the first frame of the second A, and FFR_b2 is the brightness ratio of the first frame of the second B; The step of determining the voltage value of the second power supply voltage signal based on the target coefficient, the brightness ratio of the second first frame, and the target data includes: The voltage value of the second power supply voltage signal is calculated based on the second or third relational formula. The second relation is: VSS_2=V3+(FFR_b2-FFR_a1) / x; Where VSS_2 is the voltage value of the second power supply voltage signal, and FFR_a1 is the brightness ratio of the first frame of the first A. The third relation is: VSS_2=V2+(FFR_b1-FFR_a1) / x.

12. The display device according to claim 1, characterized in that, In the target stage, when the voltage difference between the anode and cathode of the first light-emitting element is the same as the voltage difference between the anode and cathode of the second light-emitting element, the first frame brightness ratio of the first color sub-pixel is greater than the first frame brightness ratio of the second color sub-pixel. The first color sub-pixel further includes a first anode initialization module, and the second color sub-pixel further includes a second anode initialization module; The first terminal of the first anode initialization module is electrically connected to the first reference level voltage terminal, and the second terminal of the first anode initialization module is electrically connected to the anode of the first light-emitting element. It is used to provide the first reference level voltage signal provided by the first reference level voltage terminal to the anode of the first light-emitting element in the target stage, so as to initialize the anode of the first light-emitting element. The first terminal of the second anode initialization module is electrically connected to the second reference level voltage terminal, and the second terminal of the second anode initialization module is electrically connected to the anode of the second light-emitting element. It is used to provide the second reference level voltage signal provided by the second reference level voltage terminal to the anode of the second light-emitting element in the target stage, so as to initialize the anode of the second light-emitting element. If the cathode voltages of the first and second light-emitting elements are the same in the target stage, then the voltage value of the first reference level voltage signal is less than the voltage value of the second reference level voltage signal, so that the difference between the brightness ratio of the first first frame and the brightness ratio of the second first frame is less than the preset threshold.

13. A driving method for a display device, characterized in that, The display device includes a display panel, which includes a plurality of first color sub-pixels, a plurality of second color sub-pixels, and a plurality of third color sub-pixels; each first color sub-pixel includes a first light-emitting element; each second color sub-pixel includes a second light-emitting element; the method includes: In the target stage, the voltage difference between the anode and cathode of the first light-emitting element is controlled to be a first voltage difference; The voltage difference between the anode and cathode of the second light-emitting element is controlled to be a second voltage difference; the values ​​of the first voltage difference and the second voltage difference satisfy preset conditions, the preset conditions including: under the action of the first voltage difference, the first frame brightness ratio of the first color sub-pixel is a first first frame brightness ratio; under the action of the second voltage difference, the first frame brightness ratio of the second color sub-pixel is a second first frame brightness ratio; wherein, the difference between the first first frame brightness ratio and the second first frame brightness ratio is less than a preset threshold; the cathode of the first light-emitting element is electrically connected to a first power supply voltage signal line; the cathode of the second light-emitting element is electrically connected to a second power supply voltage signal line; the driving method further includes: The first power supply voltage signal line is controlled to provide a first power supply voltage signal so that the voltage difference between the anode and cathode of the first light-emitting element is the first voltage difference; The second power supply voltage signal line is controlled to provide a second power supply voltage signal so that the voltage difference between the anode and cathode of the second light-emitting element is the second voltage difference; In the target stage, when the voltage difference between the anode and cathode of the first light-emitting element is the same as the voltage difference between the anode and cathode of the second light-emitting element, the first frame brightness ratio of the first color sub-pixel is greater than the first frame brightness ratio of the second color sub-pixel; the method further includes: If the anode voltages of the first and second light-emitting elements are the same in the target stage, then the voltage value of the first power supply voltage signal is greater than the voltage value of the second power supply voltage signal, so that the difference between the brightness ratio of the first first frame and the brightness ratio of the second first frame is less than the preset threshold; the target stage is the anode initialization stage of a frame in the pixel circuit or the stage when the display is working.

14. The driving method according to claim 13, characterized in that, Under the action of the first power supply voltage signal and the second power supply voltage signal, the values ​​of the first voltage difference and the second voltage difference satisfy the preset condition, and the difference between the first frame brightness ratio and the second frame brightness ratio is less than the preset threshold.

15. The driving method according to claim 13, characterized in that, The third color subpixel is configured to display blue.

16. The driving method according to claim 13, characterized in that, Before controlling the first power supply voltage signal line to provide a first power supply voltage signal, and before controlling the second power supply voltage signal line to provide a second power supply voltage signal, the method further includes: When the voltage value of the power supply voltage signal provided by the first power supply voltage signal line is the first voltage, the first frame brightness ratio of the first color sub-pixel is determined. When the voltage value of the power supply voltage signal provided by the second power supply voltage signal line is the second voltage, the second first frame brightness ratio of the second color sub-pixel is determined; When the voltage value of the power supply voltage signal provided by the second power supply voltage signal line is the third voltage, the second first frame brightness ratio of the second color sub-pixel is determined; Based on the first voltage, determine the voltage value of the first power supply voltage signal; Based on the first voltage, the second voltage, the third voltage, the brightness ratio of the first A first frame, the brightness ratio of the second A first frame, and the brightness ratio of the second B first frame, the voltage value of the second power supply voltage signal is determined.

17. The driving method according to claim 16, characterized in that, Determining the first power supply voltage signal based on the first voltage includes: The first voltage is determined as the voltage value of the first power supply voltage signal; The step of determining the voltage value of the second power supply voltage signal based on the first voltage, the second voltage, the third voltage, the brightness ratio of the first A first frame, the brightness ratio of the second A first frame, and the brightness ratio of the second B first frame includes: The target coefficient is determined based on the difference between the brightness ratio of the first frame of the second A and the brightness ratio of the first frame of the second B, and the difference between the second voltage and the third voltage. Based on the target coefficient, the brightness ratio of the first frame of the second B, and the target data, the voltage value of the second power supply voltage signal is determined; the target data is a combination of the second voltage and the brightness ratio of the first frame of the second A, or the target data is a combination of the third voltage and the brightness ratio of the first frame of the second B.

18. The driving method according to claim 17, characterized in that, The step of determining the target coefficient based on the difference between the brightness ratio of the first frame of the second A and the brightness ratio of the first frame of the second B, and the difference between the second voltage and the third voltage, includes: The ratio of the first difference to the second difference is used as the target coefficient; the first difference is the difference between the brightness ratio of the first frame of the second A and the brightness ratio of the first frame of the second B, and the second difference is the difference between the second voltage and the third voltage.

19. The driving method according to claim 18, characterized in that, The target coefficients are calculated based on the first relational expression. The first relation is: x=(FFR_b2-FFR_b1) / (V3-V2); Where x is the target coefficient, V2 is the second voltage, V3 is the third voltage, FFR_b1 is the brightness ratio of the first frame of the second A, and FFR_b2 is the brightness ratio of the first frame of the second B; The step of determining the voltage value of the second power supply voltage signal based on the target coefficient, the brightness ratio of the second first frame, and the target data includes: The voltage value of the second power supply voltage signal is calculated based on the second or third relational formula. The second relation is: VSS_2=V3+(FFR_b2-FFR_a1) / x; Where VSS_2 is the voltage value of the second power supply voltage signal, and FFR_a1 is the brightness ratio of the first frame of the first A. The third relation is: VSS_2=V2+(FFR_b1-FFR_a1) / x.

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