Driving method of display panel and display device

Abstract

The invention discloses a driving method of a display panel and a display device.The display panel comprises a plurality of light-emitting devices and pixel circuits corresponding to the light-emitting devices, each pixel circuit comprises a driving transistor, and the driving transistors and the corresponding light-emitting devices are connected between a first power supply end and a second power supply end in series; the driving method of the display panel comprises the following steps: in a pre-lightening stage, transmitting a voltage signal related to a set data voltage to the control end of each driving transistor; a first voltage is provided for the first power supply end connected with the pixel circuit corresponding to each light emitting device, a second voltage is provided for the second power supply end, each driving transistor is controlled to be communicated with the corresponding first power supply end and the corresponding second power supply end, and the difference value of the first voltage and the second voltage is larger than a preset threshold value. The capturing degrees of holes or electrons of all the driving transistors reach the same state by increasing the voltage across the two ends of all the driving transistors, so that the problem of ghosting is solved.

Description

Technical Field

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

[0002] Organic Light-Emitting Diode (OLED) is one of the hot topics in the current research field of flat panel displays. OLED displays have the advantages of low energy consumption, low production cost, self-luminescence, wide viewing angle and fast response speed.

[0003] However, OLED displays are prone to ghosting, resulting in poor display quality. Summary of the Invention

[0004] The present invention provides a display panel driving method and a display device to solve the long-term image sticking problem of the display panel and improve the display effect.

[0005] According to one aspect of the present invention, a method for driving a display panel is provided. The display panel includes a plurality of light-emitting devices and pixel circuits corresponding to the light-emitting devices. The pixel circuits include a driving transistor. The driving transistor and the corresponding light-emitting device are connected in series between a first power supply terminal and a second power supply terminal.

[0006] The display panel driving method includes:

[0007] In the pre-lighting stage, a voltage signal related to the set data voltage is transmitted to the control terminal of each of the driving transistors; a first voltage is provided to the first power supply terminal connected to the pixel circuit corresponding to each of the light-emitting devices, and a second voltage is provided to the second power supply terminal connected to the pixel circuit corresponding to each of the light-emitting devices, and each of the driving transistors is controlled to be connected to the corresponding first power supply terminal and the second power supply terminal, so that the driving transistor generates a driving current according to the voltage signal related to the set data voltage, thereby driving the corresponding light-emitting device to emit light;

[0008] The first voltage is greater than the second voltage, and a difference between the first voltage and the second voltage is greater than a preset threshold.

[0009] Optionally, the second voltage is less than a first set threshold.

[0010] Optionally, the first voltage is greater than a second set threshold.

[0011] Optionally, the duration of the pre-lighting stage is greater than the set duration.

[0012] Optionally, when the driving transistor is a P-type transistor, the set data voltage is less than a first data voltage threshold, so that the brightness of the light-emitting device in the pre-lighting stage is greater than a preset brightness;

[0013] Alternatively, when the driving transistor is an N-type transistor, the set data voltage is greater than a second data voltage threshold, so that the brightness of the light-emitting device in the pre-lighting stage is greater than a preset brightness.

[0014] Optionally, after the pre-lighting stage, the following steps are also included:

[0015] In the formal operation phase, a voltage signal related to the working data voltage is transmitted to the control terminal of each of the driving transistors, a third voltage is provided to the first power supply terminal connected to the pixel circuit corresponding to each of the light-emitting devices, and a fourth voltage is provided to the second power supply terminal connected to the pixel circuit corresponding to each of the light-emitting devices, and each of the driving transistors is controlled to be connected to the corresponding first power supply terminal and the second power supply terminal, so that the driving transistor generates a driving current according to the voltage signal related to the working data voltage, thereby driving the corresponding light-emitting device to emit light;

[0016] The fourth voltage is lower than the third voltage.

[0017] Optionally, the fourth voltage is greater than the second voltage.

[0018] Optionally, the difference between the fourth voltage and the second voltage ranges from 0.5V to 3V.

[0019] Optionally, the pre-lighting stage is the initial moment of power-on.

[0020] According to another aspect of the present invention, a display device is provided, including a display panel and a driver, wherein the driver is configured to execute the above-mentioned method for driving a display panel to drive the display panel.

[0021] The technical solution of the embodiment of the present invention controls the difference between the first voltage applied to the first power supply terminal and the second voltage applied to the second power supply terminal to be greater than a preset threshold value. This ensures that, during the pre-lighting phase, the voltage across the driver transistors is greater than the preset threshold value. This allows all driver transistors to utilize the high voltage across their terminals to drive holes or electrons deep into the gate insulating layer through the carrier tunneling effect. This tunneling effect is used to achieve the same level of hole or electron capture in all driver transistors, thereby resolving the issue of prolonged image retention and improving display quality.

[0022] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present invention, nor is it intended to limit the scope of the present invention. Other features of the present invention will become readily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 A schematic diagram of the image sticking phenomenon of a conventional display panel;

[0025] Figure 2 A flowchart of a method for driving a display panel provided by an embodiment of the present invention;

[0026] Figure 3 A schematic structural diagram of a pixel circuit provided by an embodiment of the present invention;

[0027] Figure 4 A flowchart of another display panel driving method provided by an embodiment of the present invention;

[0028] Figure 5 A schematic structural diagram of a display device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0030] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0031] As described in the background art, existing display panels have an afterimage problem. The afterimage problem of the display panel is described below. Figure 1 Schematic diagram of the image sticking phenomenon of a conventional display panel. Figure 1 During the performance test of the display panel, the display panel is set to display a black and white checkerboard image for a period of time, and then switch to a low-grayscale gray image. Specifically, the display panel is set to display a black and white image (for example, a black block at grayscale 0 and a white block at grayscale 255) in the previous frame and maintain this for a preset time (for example, 20 seconds). Then, the display is switched to an intermediate grayscale image (for example, grayscale 64) in the current frame. Due to the presence of residual images in the black and white images, the brightness of the original black blocks in the final display is higher than that of the original white blocks, which is reflected in the original black blocks being darker than the original white blocks. In other words, the display panel has residual images, which affects the display quality of the display panel.

[0032] The inventors have found that the reasons for this problem are as follows: existing display panels usually include multiple pixel circuits, and the pixel circuits include driving transistors that drive the light-emitting devices to emit light. The driving transistor controls the brightness of the light-emitting devices by controlling the driving current flowing through the light-emitting devices. The driving current generated by the driving transistor is related to the gate-source voltage difference of the driving transistor. Under different display grayscales, the gate-source voltage difference of the driving transistor is different. The difference in the gate-source voltage difference of the driving transistor causes differences in the working state of the driving transistor, which in turn causes differences in the capture and release of carriers in the active layer, gate insulating layer, and the interface between the active layer and the gate insulating layer inside the driving transistor. As a result, when converting from different grayscales to the same grayscale, the driving current of the driving transistor is different, which ultimately leads to differences in the brightness of the light and forms an afterimage.

[0033] In view of the above technical problems, an embodiment of the present invention provides a method for driving a display panel to solve the problem of display ghosting. Figure 2 A flowchart of a method for driving a display panel provided by an embodiment of the present invention is provided. Figure 3 A schematic diagram of a pixel circuit according to an embodiment of the present invention is provided. Figure 2 and Figure 3 The display panel includes a plurality of light-emitting devices LD and pixel circuits 1 corresponding to the light-emitting devices LD. The pixel circuits 1 include a driving transistor DT. The driving transistor DT and the corresponding light-emitting device LD are connected in series between a first power supply terminal ELVDD and a second power supply terminal ELVSS. The pixel circuits 1 can be connected to the light-emitting devices LD in a one-to-one correspondence, or one pixel circuit 1 can be connected to multiple light-emitting devices LD, although this embodiment is not limited thereto.

[0034] The driving method of the display panel includes:

[0035] S110 : In the pre-lighting stage, a voltage signal related to a set data voltage is transmitted to the control terminal G of each driving transistor DT.

[0036] The data voltage is set to a value of a data voltage set in advance, so that the driving transistor DT generates a set driving current. Figure 3 This is a simplified diagram of a pixel circuit shown in this embodiment, showing only the driving transistor DT and the light-emitting device LD. The pixel circuit 1 can be a 2T1C circuit, with the control terminal G of the driving transistor DT directly connected to the data voltage. In this case, the voltage signal associated with the set data voltage described in S110 is the data voltage. The pixel circuit 1 can also be a 7T1C circuit, in which case the voltage signal associated with the set data voltage in S110 is a voltage signal including the data voltage and the threshold voltage of the driving transistor DT. The pixel circuit 1 can also be in other circuit forms, which are not specifically limited in this embodiment.

[0037] S120: In the pre-lighting stage, a first voltage is provided to the first power supply terminal ELVDD connected to the pixel circuit 1 corresponding to each light-emitting device LD, and a second voltage is provided to the second power supply terminal ELVSS connected to the pixel circuit 1 corresponding to each light-emitting device LD, and each driving transistor DT is controlled to be connected to the corresponding first power supply terminal ELVDD and the second power supply terminal ELVSS, so that the driving transistor DT generates a driving current Ioled according to a voltage signal related to the set data voltage, and drives the corresponding light-emitting device LD to emit light; wherein the first voltage is greater than the second voltage and the difference between the first voltage and the second voltage is greater than a preset threshold.

[0038] The first voltage is greater than the second voltage. The first voltage can be a positive voltage, and the second voltage can be a negative voltage. The first power supply terminal ELVDD connected to all pixel circuits included in the display panel is connected to the first voltage, that is, the voltage connected to all first power supply terminals ELVDD in the display panel is the same. Similarly, the second power supply terminal ELVSS connected to all pixel circuits 1 included in the display panel is connected to the second voltage, that is, the voltage connected to all second power supply terminals ELVSS in the display panel is the same. The difference between the first voltage and the second voltage is greater than a preset threshold. After writing the data voltage, the first power supply terminal is controlled to be connected to the first terminal of the driving transistor DT, the second terminal of the driving transistor DT is controlled to be connected to the first electrode of the light-emitting device LD, and the second electrode of the light-emitting device LD is connected to the second power supply terminal ELVSS. A driving current flow path is formed between the first power supply terminal ELVDD and the second power supply terminal ELVSS, so that the driving current generated by the driving transistor DT according to the voltage signal related to the set data voltage drives the corresponding light-emitting device LD to emit light. The first voltage applied by the first power terminal ELVDD is transmitted to the first terminal of the driving transistor DT, and the second voltage applied by the second power terminal ELVSS is transmitted to the second terminal of the driving transistor DT, so that in the pre-lighting stage, the voltage across the two ends of the driving transistor DT is relatively large.

[0039] By controlling the difference between the first voltage applied to the first power supply terminal and the second voltage applied to the second power supply terminal to be greater than a preset threshold, the voltage across the two ends of the driving transistor DT is greater than the preset threshold during the pre-lighting phase. This allows all driving transistors DT to leverage the high voltage across their two ends and, through the tunneling effect of carriers, drive holes or electrons deep into the gate insulating layer. This tunneling effect brings the hole or electron capture levels of all driving transistors DT to the same level, thereby resolving the issue of prolonged image sticking and improving display quality.

[0040] After the display area of ​​the display panel is illuminated for a set duration using the above-mentioned driving method, the brightness of the red sub-pixel R, green sub-pixel G, and blue sub-pixel B in the pre-lighting stage and the non-pre-lighting stage is obtained at the target grayscale, and the actual display brightness is compared with the target brightness to obtain a comparison table before and after the implementation of the scheme.

[0041] Table 1 Comparison of brightness attenuation of sub-pixels of different colors before and after adding the pre-lighting stage

[0042]

[0043]

[0044] As can be seen from Table 1, by adding a pre-lighting stage and controlling the two ends of all driving transistors DT in the display panel to withstand a larger cross-voltage during the pre-lighting stage so that the hole or electron capture degree of all driving transistors DT reaches the same state, the brightness attenuation of each light-emitting device can be significantly reduced, and the afterimage phenomenon can be significantly improved.

[0045] refer to Figure 3 , optionally, the second voltage is less than the first set threshold.

[0046] The working process of the display panel includes a pre-lighting stage and a formal working stage. The formal working stage is the stage in which the light-emitting devices in the display panel are controlled to display the corresponding brightness according to the screen required by the user. In the pre-lighting stage, the first voltage connected to the first power supply terminal ELVDD can be controlled to be equal to the voltage connected to the first power supply terminal ELVDD in the formal working stage, and the second voltage connected to the second power supply terminal can be controlled to be less than the voltage connected to the second power supply terminal ELVSS in the formal working stage. That is, in the pre-lighting stage, the voltage connected to the second power supply terminal ELVSS is reduced, and the second voltage is controlled to be less than the first set threshold value, so that the cross-voltage across the driving transistor DT is greater than the sub-threshold, so that under high cross-voltage, the carrier tunneling effect is used to drive holes or electrons into the deep of the gate insulating layer. The tunneling effect of holes or electrons is used to achieve the same capture degree of holes or electrons in all driving transistors DT, thereby solving the problem of long-term image retention and improving the display effect. Among them, the first set threshold value is less than the voltage connected to the second power supply terminal ELVSS in the formal working stage.

[0047] Alternatively, the first voltage is greater than the second set threshold. In the pre-lighting stage, the second voltage connected to the second power supply terminal ELVSS can be controlled to be equal to the voltage connected to the second power supply terminal ELVSS in the formal operation stage, and the first voltage connected to the first power supply terminal ELVDD can be controlled to be greater than the voltage connected to the first power supply terminal ELVDD in the formal operation stage. That is, in the pre-lighting stage, the voltage connected to the second power supply terminal ELVDD is increased, and the first voltage is controlled to be greater than the second set threshold, so that the voltage across the driving transistor DT is greater than the sub-threshold. The second set threshold is greater than the voltage connected to the first power supply terminal ELVDD in the formal operation stage.

[0048] Alternatively, the first voltage is controlled to be greater than the second set threshold, and the second voltage is controlled to be less than the first set threshold, so as to increase the voltage across the driving transistor DT.

[0049] Optionally, the duration of the pre-lighting phase is longer than the set duration. For example, the set duration can be 1 hour. The pre-lighting phase needs to last for a certain period of time or longer to fully drive holes or electrons deep into the gate insulating layer. By utilizing the tunneling effect of holes or electrons, the hole or electron capture levels of all driving transistors DT are brought to the same state, thereby solving the problem of long-term image retention.

[0050] Continue to refer Figure 3 Optionally, when the driving transistor DT is a P-type transistor, the data voltage is set to be less than the first data voltage threshold, so that the brightness of the light-emitting device LD in the pre-lighting stage is greater than the preset brightness;

[0051] Alternatively, when the driving transistor DT is an N-type transistor, the data voltage is set to be greater than the second data voltage threshold, so that the brightness of the light emitting device LD in the pre-lighting stage is greater than the preset brightness.

[0052] Each grayscale value corresponds to a display brightness, and each grayscale value corresponds to a data voltage. Therefore, each data voltage corresponds to a display brightness, and the display brightness can be adjusted by adjusting the data voltage. When the driving transistor DT is a P-type transistor, the smaller the data voltage, the larger the drive current, and accordingly, the brighter the display panel. When the driving transistor DT is an N-type transistor, the larger the data voltage, the larger the drive current, and accordingly, the brighter the display panel. Therefore, by controlling the magnitude of the preset data voltage connected to the control terminal G of the driving transistor DT during the pre-lighting phase, the drive current of the light-emitting device LD is made greater than the set current threshold, so that the light-emitting device LD is illuminated at least at the preset brightness. During the pre-lighting phase, the greater the drive current flowing through the light-emitting device LD, the faster the holes or electrons are driven deep into the gate insulating layer, thereby accelerating the speed at which the hole or electron capture levels of all the driving transistors DT reach the same state, shortening the duration of the pre-lighting phase.

[0053] Figure 4 A flowchart of another display panel driving method provided by an embodiment of the present invention is provided. Figure 3 and Figure 4 Optionally, the driving method of the display panel includes:

[0054] S111 : In the pre-lighting stage, a voltage signal related to a set data voltage is transmitted to the control terminal G of each driving transistor DT.

[0055] S121: In the pre-lighting stage, a first voltage is provided to the first power supply terminal ELVDD connected to the pixel circuit 1 corresponding to each light-emitting device LD, and a second voltage is provided to the second power supply terminal ELVSS connected to the pixel circuit 1 corresponding to each light-emitting device LD, and each driving transistor DT is controlled to be connected to the corresponding first power supply terminal and the second power supply terminal, so that the driving transistor DT generates a driving current Ioled according to a voltage signal related to the set data voltage, and drives the corresponding light-emitting device LD to emit light.

[0056] S131: In the formal operation phase, a voltage signal related to the operating data voltage is transmitted to the control terminal of each driving transistor DT, a third voltage is provided to the first power supply terminal ELVDD connected to the pixel circuit 1 corresponding to each light-emitting device LD, and a fourth voltage is provided to the second power supply terminal ELVSS connected to the pixel circuit 1 corresponding to each light-emitting device LD. Each driving transistor DT is controlled to be connected to the corresponding first power supply terminal ELVDD and second power supply terminal ELVSS, so that the driving transistor generates a driving current according to the voltage signal related to the operating data voltage, thereby driving the corresponding light-emitting device LD to emit light. The fourth voltage is lower than the third voltage.

[0057] After all the light-emitting devices in the display panel are illuminated for at least a set time in the pre-display phase, the hole or electron capture levels of each driving transistor DT are brought to the same state to avoid ghosting. Then, the display panel enters its official operating phase. The operating data voltage is the data voltage value corresponding to the brightness required by the user. The target brightness to be displayed is determined based on user needs, the corresponding target grayscale is determined based on the target brightness, and the corresponding data voltage value, i.e., the operating data voltage, is determined based on the target grayscale. A voltage signal related to the operating data voltage is written to the control terminal G of the driving transistor DT, causing the driving transistor DT to generate a driving current to drive the connected light-emitting device LD to emit light.

[0058] Continue to refer Figure 3Optionally, the fourth voltage is greater than the second voltage. During the pre-lighting phase, to increase the voltage across the driving transistor DT, the second voltage applied to the second power supply terminal ELVSS can be set to a lower value. During the full operation phase, when the driving transistor DT does not require a high voltage across the driving transistor DT, the voltage applied to the second power supply terminal ELVSS, i.e., the fourth voltage, can be appropriately increased to reduce the voltage difference between the first power supply terminal ELVDD and the second power supply terminal ELVSS during the full operation phase, thereby reducing the power consumption of the display panel. Optionally, the difference between the fourth voltage and the second voltage ranges from 0.5V to 3V. For example, the fourth voltage applied to the display panel of a wearable display device during the full operation phase is between -2V and -4V, and the fourth voltage applied to the display panel of a mobile phone during the full operation phase is between -2V and -5V. Regardless of the display panel used in the device, during the pre-lighting phase, the second voltage applied to the second power supply terminal ELVSS can be reduced by 0.5V to 3V compared to the fourth voltage to increase the voltage across the driving transistor DT during the pre-lighting phase.

[0059] The pre-lighting stage can be the initial startup moment, when the display panel is turned on, the full screen is illuminated under a larger cross voltage for a set length of time to avoid the phenomenon of ghosting during the subsequent formal operation phase. Alternatively, the pre-lighting stage can be set according to user needs, and the display panel will enter the pre-lighting stage after each set working time.

[0060] An embodiment of the present invention further provides a display device, Figure 5 This is a schematic diagram of the structure of a display device provided by an embodiment of the present invention. The display device 2 includes a display panel 3 and a driver. The driver is used to execute the display panel driving method in the above embodiment to drive the display panel 3. The display device 2 can be Figure 5 The mobile phone shown can also be a computer, a television, a smart wearable display device, etc., and the embodiments of the present invention do not specifically limit this. In the pre-lighting stage, the voltage across all the driving transistors DT in the display device is greater than a preset threshold value, so that all the driving transistors DT rely on the high voltage across their own two ends to use the tunneling effect of carriers to drive holes or electrons deep into the gate insulating layer. By utilizing the tunneling effect of holes or electrons, the capture degree of holes or electrons in all driving transistors DT is brought to the same state, thereby solving the problem of long-term image retention and improving the display effect.

[0061] It should be understood that the various forms of the processes shown above can be used to reorder, add, or delete steps. For example, the steps described in the present invention can be performed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of the present invention can be achieved. This is not limited herein.

[0062] The above specific embodiments do not limit the scope of protection of the present invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of protection of the present invention.

Claims

1. A method for driving a display panel, characterized in that: The display panel includes a plurality of light-emitting devices and pixel circuits corresponding to the light-emitting devices, wherein the pixel circuits include a driving transistor, and the driving transistor and the corresponding light-emitting device are connected in series between a first power supply terminal and a second power supply terminal; The display panel driving method includes: In the pre-lighting stage, a voltage signal related to the set data voltage is transmitted to the control terminal of each of the driving transistors; a first voltage is provided to the first power supply terminal connected to the pixel circuit corresponding to each of the light-emitting devices, and a second voltage is provided to the second power supply terminal connected to the pixel circuit corresponding to each of the light-emitting devices, and each of the driving transistors is controlled to be connected to the corresponding first power supply terminal and the second power supply terminal, so that the driving transistor generates a driving current according to the voltage signal related to the set data voltage, thereby driving the corresponding light-emitting device to emit light; The first voltage is greater than the second voltage, and a difference between the first voltage and the second voltage is greater than a preset threshold.

2. The method for driving a display panel according to claim 1, wherein: The second voltage is less than a first set threshold.

3. The method for driving a display panel according to claim 1, wherein: The first voltage is greater than a second set threshold.

4. The method for driving a display panel according to claim 1, wherein: The duration of the pre-lighting stage is greater than the set duration.

5. The method for driving a display panel according to claim 1, wherein: When the driving transistor is a P-type transistor, the set data voltage is less than a first data voltage threshold, so that the brightness of the light-emitting device in the pre-lighting stage is greater than a preset brightness; Alternatively, when the driving transistor is an N-type transistor, the set data voltage is greater than a second data voltage threshold, so that the brightness of the light-emitting device in the pre-lighting stage is greater than a preset brightness.

6. The method for driving a display panel according to any one of claims 1 to 5, wherein: After the pre-lighting phase also includes: In the formal operation phase, a voltage signal related to the working data voltage is transmitted to the control terminal of each of the driving transistors, a third voltage is provided to the first power supply terminal connected to the pixel circuit corresponding to each of the light-emitting devices, and a fourth voltage is provided to the second power supply terminal connected to the pixel circuit corresponding to each of the light-emitting devices, and each of the driving transistors is controlled to be connected to the corresponding first power supply terminal and the second power supply terminal, so that the driving transistor generates a driving current according to the voltage signal related to the working data voltage, thereby driving the corresponding light-emitting device to emit light; The fourth voltage is lower than the third voltage.

7. The method for driving a display panel according to claim 6, wherein: The fourth voltage is greater than the second voltage.

8. The method for driving a display panel according to claim 6, wherein: The difference between the fourth voltage and the second voltage ranges from 0.5V to 3V.

9. The method for driving a display panel according to claim 1, wherein: The pre-lighting stage is the initial moment of power-on.

10. A display device, characterized in that: The device comprises a display panel and a driver, wherein the driver is used to execute the display panel driving method according to any one of claims 1 to 9 to drive the display panel.

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