Pixel driving method, and driving circuit, display panel and display apparatus

Abstract

Provided in the present invention are a pixel driving method, and a driving circuit, a display panel and a display apparatus. The pixel driving method comprises the steps of: providing a display panel, wherein the display panel comprises a plurality of sub-pixels; determining an initial light emission stage of each frame period of the sub-pixels; acquiring a display brightness value of the display panel; when the display brightness value in the initial light emission stage is greater than or equal to a first preset threshold value, acquiring a pulse width of a first scanning signal, and using same as a first pulse width; and in response to the display brightness value in the initial light emission stage being less than the first preset threshold value, reducing the pulse width of the first scanning signal to make same equal to the first pulse width. The present invention shortens a lightening time of a light-emitting element in the early stage of each frame period in the case of low brightness, and ensures the same lightening time within one frame period at different levels of brightness, thereby ameliorating the low-frequency flickering problem of an OLED product.

Description

Pixel driving method and driving circuit, display panel and display device Technical Field

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

[0002] Organic Light Emitting Diodes (OLEDs) have the characteristics of self-luminescence, fast response, wide color gamut, large viewing angle, and high brightness. They can be used to produce thin display devices and flexible display devices, and have become the focus of current research in the field of display technology.

[0003] Organic light-emitting diodes (OLEDs) require current to drive, meaning they are current-controlled devices. Their brightness is proportional to the average time the current flows through them. Before the current reaches the OLED's light-emission threshold, the device's brightness is minimal. Once the current reaches the threshold, the OLED's light intensity increases as the current increases. An OLED unit can be simplified as an LED connected in parallel with a parasitic capacitor. To make an OLED emit light, the current source must first charge the parasitic capacitor to the OLED's light-emission voltage, which takes a long time to charge and results in a slow response time.

[0004] For OLED products with fixed-rate displays, switching between frames doesn't cause brightness flicker. However, for OLED products with variable-rate displays, at low grayscales, the OLED's light-emitting current is low, and the OLED's parasitic capacitance can't charge quickly. Consequently, the OLED's light-emitting elements can't reach their full brightness for extended periods within each frame. At low refresh rates, the on-times for different DBVs (display brightness values) within each frame cycle vary significantly, potentially causing brightness flicker.

[0005] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present invention, and therefore may include information that does not constitute prior art known to ordinary technicians in this field.

[0006] Summary of the Invention

[0007] In view of this, the present invention provides a pixel driving method and driving circuit, a display panel and a display device to solve the flicker problem caused by the large difference in the lighting time of different DBVs within a frame period.

[0008] According to one aspect of the present invention, a pixel driving method is provided, which is applied to a pixel driving circuit, wherein the pixel driving circuit includes a light-emitting element, a first switching device that transmits a driving current to the light-emitting element, and a reset transistor connected to the anode of the light-emitting element; the first switching device is connected to a first scanning signal; and the method comprises the steps of:

[0009] A display panel is provided; the display panel includes a plurality of sub-pixels;

[0010] determining an initial light emitting phase of each frame period of the sub-pixel;

[0011] Obtaining a display brightness value of the display panel;

[0012] acquiring, as a first pulse width, a pulse width of the first scanning signal when the display brightness value in the initial light-emitting stage is greater than or equal to a first preset threshold;

[0013] In response to the display brightness value being less than a first preset threshold value in the initial light-emitting stage, the pulse width of the first scanning signal is reduced to be equal to the first pulse width.

[0014] Optionally, the method further comprises the steps of:

[0015] Determining an effective light emitting phase of each frame period of the sub-pixel;

[0016] In response to the display brightness value being less than a first preset threshold value in the effective light emitting stage, the pulse width of the first scanning signal is adjusted to be greater than the first pulse width.

[0017] Optionally, the reset transistor is connected to an initial reset signal; the method further comprises the steps of:

[0018] In the initial light emitting stage, the pulse width of the initial reset signal is increased.

[0019] Optionally, the reset transistor is connected to an initial reset signal, and the method further comprises the steps of:

[0020] In the initial light emitting stage, the number of times the reset transistor is turned on is reduced.

[0021] Optionally, in the initial light-emitting stage, the pulse waveform of the first scanning signal when the display brightness value is less than a first preset threshold is the same as the pulse waveform when the display brightness value is greater than or equal to the first preset threshold.

[0022] Optionally, in the initial light emitting stage, increasing the pulse width of the initial reset signal includes:

[0023] Obtaining a pulse waveform of the initial reset signal before adjustment as a reference pulse waveform;

[0024] Based on the reference pulse waveform, the pulse width of the initial reset signal in the initial light emitting stage is increased.

[0025] Optionally, the method further comprises the steps of:

[0026] Determining an effective light emitting phase of each frame period of the sub-pixel;

[0027] The pulse waveform of the initial reset signal in the effective light-emitting phase is set to be the same as the pulse waveform of the reference pulse waveform in the effective light-emitting phase.

[0028] Optionally, the reset transistor is further connected to a first reference voltage signal, and the pixel driving circuit further includes a driving transistor, and the driving transistor is respectively connected to a second reference voltage signal and the first switching device.

[0029] According to another aspect of the present invention, a pixel driving circuit is provided, which includes a light-emitting element, a first switching device that transmits a driving current to the light-emitting element, and a reset transistor connected to the anode of the light-emitting element; the first switching device is connected to a first scanning signal; and the pixel driving circuit is driven based on any of the above-mentioned pixel driving methods.

[0030] According to another aspect of the present invention, a display panel is provided. The display panel includes the pixel driving circuit.

[0031] According to another aspect of the present invention, a display device is provided. The display device includes the display panel.

[0032] The beneficial effects of the present invention compared with the prior art are:

[0033] The pixel driving method and driving circuit, display panel and display device provided by the present invention adjust the pulse width of the first scanning signal under low brightness conditions in the initial light-emitting stage; and set different working timings for the first scanning signal according to different display brightnesses, so that the light-emitting element can quickly light up in the initial light-emitting stage under low brightness conditions, reducing the early light-up time in each frame period under low brightness conditions, making the light-up time under different display brightnesses the same, and improving the low-frequency flicker problem of OLED products. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The accompanying drawings are incorporated into and constitute a part of this specification, illustrate embodiments consistent with the present invention, and together with the description, serve to explain the principles of the present invention. Obviously, the drawings described below are only some embodiments of the present invention, and it is clear that those skilled in the art can derive other drawings based on these drawings without inventive effort.

[0035] FIG1 is a schematic structural diagram of a pixel driving circuit disclosed in one embodiment of the present invention;

[0036] FIG2 is a schematic diagram showing a timing sequence of delaying the light emission time according to an embodiment of the present invention;

[0037] FIG3 is a schematic flow chart of a pixel driving method disclosed in an embodiment of the present invention;

[0038] FIG4 is a schematic diagram showing the working timing of the first scanning signal under low brightness, the first scanning signal under high brightness and the initial reset signal before adjustment;

[0039] 5 is a schematic diagram showing the working timing of the first scanning signal under low brightness, the first scanning signal under high brightness and the initial reset signal after adjustment based on the solution of the present invention;

[0040] FIG6 is a schematic diagram showing a comparison of the lighting time corresponding to the case where one frame at a 30 Hz refresh rate is equivalent to two frames at a 60 Hz refresh rate before adjustment;

[0041] FIG7 is a schematic diagram of brightness changes between two adjacent frames at a 30 Hz refresh rate according to an embodiment of the present invention;

[0042] FIG8 is a schematic diagram showing a comparison of the lighting times corresponding to one frame at a 30 Hz refresh rate being equivalent to two frames at a 60 Hz refresh rate after adjustment based on the solution of the present invention. DETAILED DESCRIPTION

[0043] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in various forms and should not be construed as being limited to the embodiments set forth herein. On the contrary, these embodiments are provided so that the present invention will be comprehensive and complete, and the concept of the example embodiments will be fully conveyed to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure can be practiced without one or more of the above-mentioned specific details, or other methods, materials, devices, etc. may be adopted. In other cases, well-known technical solutions are not shown or described in detail to avoid blurring various aspects of the present disclosure. The same reference numerals in the figures represent the same or similar structures, and their detailed descriptions will be omitted.

[0044] The terms "a", "an", "the", "above", and "at least one" are used to indicate the presence of one or more elements / components / etc.; the terms "including", "having", and "having" are used to express open-ended inclusiveness and mean that additional elements / components / etc. may be present in addition to the listed elements / components / etc.

[0045] FIG1 shows a pixel driving circuit in an embodiment of the present invention. The driving circuit includes a light emitting element D1, a first switching device T1, a driving transistor T2 and a reset transistor T3. The driving transistor T2 generates a driving current I OLED The third electrode, or gate, of the driving transistor T2 can be connected to a preset data signal DATA. When the preset data signal DATA writes a grayscale voltage to the gate of the driving transistor T2, the driving transistor T2 is turned on. The magnitude of the on-state current of the driving transistor T2 determines the grayscale drive current, thereby achieving different brightness levels.

[0046] The first electrode of the driving transistor T2 is connected to the second reference voltage signal ELVDD, and the second electrode is connected to the first electrode of the first switching device T1. The second electrode of the first switching device T1 is connected to the anode of the light-emitting element D1, and the third electrode, i.e., the gate, of the first switching device T1 is connected to the first scanning signal EM. The first electrode of the reset transistor T3 is connected to the first reference voltage signal VINT, the second electrode is connected to the anode of the light-emitting element D1, and the third electrode, i.e., the gate, is connected to the initial reset signal S n The cathode of the light emitting element D1 is connected to the third reference voltage signal ELVSS.

[0047] From the above circuit structure, it can be seen that the initial reset signal S nControls the on and off of the reset transistor T3. The first scanning signal EM controls the on and off of the first switching device T1. The signal EM is a periodic cut-off signal input to the gate of the first switching device T1. In this embodiment, the signal EM is a periodic high-level signal used to generate a black screen at a certain frequency within each frame period. Specifically, referring to Figure 1, when the gate of the first switching device T1 receives a high-level signal, the first switching device T1 is turned off, and the driving current I OLED The light cannot be transmitted to the OLED light emitting element D1 through the first switching device T1 , causing the brightness of the light emitting element D1 to be reduced to zero, resulting in a black screen.

[0048] Continuing to refer to FIG1 , the initial reset signal S n Is the level signal received by the gate of the reset transistor T3. There is a parasitic capacitance C between the anode and cathode of the light emitting element D1. OLED .

[0049] 2, during the operation of the driving circuit, at the initial stage of a frame period, when the initial reset signal S is input to the gate of the reset transistor T3, n At this time, the EM signal is high, the light emitting element D1 does not work, and the parasitic capacitance C of the reset transistor T3 to the light emitting element D1 OLED Perform discharge operation to prevent contrast from decreasing. n = is set to high level, EM signal is set to low level, the reset process ends, and the light emitting element D1 enters the effective light emitting stage. However, due to the parasitic capacitance C OLED The existence of the driving current I that should flow from the anode of the light-emitting element D1 to its cathode to make the light-emitting element D1 emit light in the light-emitting stage OLED , first calculate the parasitic capacitance C OLED The charge is then passed through the light emitting element D1, causing the light emitting element D1 to enter the effective light emitting stage, resulting in a delayed light emitting time t for the OLED light emitting element D1. DELAY .

[0050] Therefore, at the initial stage of the frame period, due to the parasitic capacitance C OLED During the charging process, there is a certain time delay in the light emission of the light emitting element D1, which is shown in Figure 2 as the anode voltage V ANODE At the initial stage of the frame period, the luminance of the OLED light emitting element D1 slowly rises to a predetermined value. At the initial stage of the frame period, there is a delayed luminescence time t DELAY The time period corresponding to the delayed light emission time is the initial light emission stage, and the stage in which the OLED light emitting element emits normal light after the initial light emission stage is the effective light emission stage.

[0051] Delayed luminescence time tDELAY It is determined specifically according to the following formula (1):

[0052] Where V F It is the forward voltage drop of the OLED light emitting element D1, that is, the voltage value between the anode and cathode of the OLED light emitting element D1, which ensures that the OLED light emitting element D1 emits light normally.

[0053] Delayed luminescence time t DELAY It has grayscale dependence. Under high grayscale display conditions (driving current I OLED High) Delayed luminescence time t DELAY It is a very small value and can be ignored.

[0054] As shown in FIG3 , an embodiment of the present invention discloses a pixel driving method. The pixel driving method is applied to the pixel driving circuit disclosed in any of the above embodiments. Referring to FIG3 , the pixel driving method in this embodiment mainly includes: S110, providing a display panel. The above display panel includes a plurality of sub-pixels. S120, determining the initial light-emitting stage of each frame period of the above sub-pixels. S130, obtaining the display brightness value of the above display panel. S140, obtaining the pulse width of the above first scanning signal when the above display brightness value in the above initial light-emitting stage is greater than or equal to the first preset threshold, as the first pulse width. S150, in response to the above display brightness value in the above initial light-emitting stage being less than the first preset threshold, reducing the pulse width of the above first scanning signal to make it equal to the above first pulse width. That is, the charging time when the display brightness value in the initial light-emitting stage is less than the first preset threshold is increased, so as to achieve the effect of rapid lighting of the light-emitting element.

[0055] In the above step S120, the initial light-emitting stage is the above delayed light-emitting time t DELAY The corresponding stage is the stage in which the OLED light-emitting element D1 is illuminated. In step S130, the display brightness value is DBV (display brightness value). The purpose of step S150 is to ensure that, during the initial light-emitting stage, the pulse width of the EM signal when the display brightness value is less than the first preset threshold is equal to the pulse width of the EM signal when the display brightness value is greater than or equal to the first preset threshold.

[0056] In some embodiments, the display brightness value less than the first preset threshold can be understood as a low brightness situation, and the display brightness value greater than or equal to the first preset threshold can be understood as a high brightness situation.

[0057] That is, in this embodiment, referring to FIG4 , EM1 is the waveform of the first scanning signal when the display brightness value before adjustment is less than the first preset threshold, i.e., the waveform of the first scanning signal under low brightness conditions. EM2 is the waveform of the first scanning signal when the display brightness value before adjustment is greater than or equal to the first preset threshold, i.e., the waveform of the first scanning signal under high brightness conditions. The time during which the EM pulse signal remains at a low level corresponds to the charging time of the light-emitting element. Referring to FIG4 , it can be seen that the charging time of the light-emitting element under low brightness conditions is significantly shorter than that under high brightness conditions. In other words, the lighting time under low brightness conditions is longer than that under high brightness conditions, resulting in different lighting times. Furthermore, this makes it impossible to equate one frame at a 30Hz refresh rate with two frames at a 60Hz refresh rate, hindering the implementation of the corresponding technical solution for solving flicker problems by effectively increasing the refresh rate. For example, the first preset threshold may be 50 nits, but the present invention is not limited thereto.

[0058] Referring to Figure 5, EM3 shows the waveform of the first scanning signal after adjustment for low brightness. EM4 shows the waveform of the first scanning signal after adjustment for high brightness. During implementation of the technical solutions of the embodiments of the present invention, the pulse waveform of the first scanning signal during both the initial light-emitting phase and the effective light-emitting phase remains unchanged for high brightness. However, the pulse waveform of the first scanning signal during both the initial light-emitting phase and the effective light-emitting phase changes for low brightness.

[0059] Specifically, referring again to Figures 4 and 5 , in low-brightness conditions, within a frame, because the OLED's charging time is relatively short, the brightness gradually increases from the initial light-emitting stage to the effective light-emitting stage. During the initial light-emitting stage, the pulse width of the first scanning signal at low brightness is reduced. During the effective light-emitting stage, the pulse width of the first scanning signal at low brightness is increased. That is, compared to the EM signal at low brightness before adjustment, the pulse width of the EM signal is reduced. This increases the charging time of the light-emitting element during the initial light-emitting stage at low brightness, achieving the effect of rapid lighting of the light-emitting element. Reducing the brightness during the effective light-emitting stage facilitates the subsequent equivalent of one frame at a 30Hz refresh rate to two frames at a 60Hz refresh rate, ensuring that the brightness of the two equivalent 60Hz frames corresponding to 30Hz is as equal as possible, thereby further improving the flicker problem.

[0060] In some preferred embodiments, during the initial light-emitting phase, the pulse waveform of the first scanning signal at low brightness is the same as the pulse waveform at high brightness. This helps further ensure that the light-emitting elements have the same lighting time at different brightness levels, facilitating the subsequent conversion of one frame at a 30Hz refresh rate to two frames at a 60Hz refresh rate, thereby further improving flicker.

[0061] Another embodiment of the present invention discloses another pixel driving method. Based on the embodiment corresponding to FIG3 above, the method further includes the following steps: S160, determining the effective light-emitting stage of each frame period of the above-mentioned sub-pixel. S170, in response to the above-mentioned display brightness value being less than the first preset threshold value in the above-mentioned effective light-emitting stage, adjusting the pulse width of the above-mentioned first scanning signal so that it is greater than the above-mentioned first pulse width. That is, referring to FIG5 , this embodiment increases the pulse width under low brightness conditions in the effective light-emitting stage, that is, reduces its charging time; while the pulse width under high brightness conditions in the effective light-emitting stage remains unchanged. This is conducive to the brightness change curves of the light-emitting elements at different brightness being approximately symmetrical, thereby facilitating the realization of making one frame under a 30Hz refresh rate equivalent to two frames under a 60Hz refresh rate, thereby facilitating further improvement of the flicker problem.

[0062] Referring to Figure 6, it shows a comparison of the corresponding light-up times when one frame at a 30Hz refresh rate is equivalent to two frames at a 60Hz refresh rate before adjustment. As can be seen from Figure 6, since any two of the four values ​​of LV.1, LV.2, LV.3 and LV.4 are not equal, that is, LV.1≠LV.2≠LV.3≠LV.4, it is impossible to make one frame at a 30Hz refresh rate equivalent to two frames at a 60Hz refresh rate. Referring to Figure 7, it shows a schematic diagram of the brightness change of two adjacent frames at a 30Hz refresh rate after adopting the above-mentioned technical solution disclosed in the present invention. As can be seen from Figure 7, the light-up time of two adjacent frames is the same. Referring to Figure 8, it shows a comparison of the corresponding light-up times when one frame at a 30Hz refresh rate is equivalent to two frames at a 60Hz refresh rate after adopting the above-mentioned technical solution disclosed in the present invention. As can be seen from Figure 8, since LV.1, LV.2, LV.3 and LV.4 are all equal, that is, LV.1 = LV.2 = LV.3 = LV.4, based on the present invention, one frame at a 30Hz refresh rate can be equivalent to two frames at a 60Hz refresh rate, which is further beneficial to improving the low-frequency flicker problem.

[0063] It should be noted that, in the above embodiment of the present invention, the third reference voltage signal ELVSS and the first reference voltage signal VINT are negative potentials, and the second reference voltage signal ELVDD is a positive potential, that is, the second reference voltage signal ELVDD is output as a positive power supply voltage, and the third reference voltage signal ELVSS is output as a negative power supply voltage.

[0064] All switching devices involved in the above embodiments of the present invention can be P-type thin film transistors or N-type thin film transistors. And all switching devices in the circuit are of the same type, that is, all are P-type thin film transistors, or all are N-type thin film transistors. When all are P-type thin film transistors (i.e., P-type TFTs), the corresponding active level signal is a low level, and the inactive level signal is a high level. When all are N-type thin film transistors (N-type TFTs), the corresponding active level signal is a high level, and the inactive level signal is a low level.

[0065] It should be noted that in this embodiment, the switching devices selected in the circuit design of this embodiment are all P-type TFTs, and the corresponding active level signal is a low level, and the inactive level signal is a high level. However, the application is not limited to this type of switching device.

[0066] It should be further noted that the first electrode of all switching devices involved in the above embodiments of the present invention can be either a source or a drain, and the second electrode can also be the other of the source and drain. That is, for example, when the first electrode is a source, the second electrode is a drain. When the first electrode is a drain, the second electrode is a source.

[0067] In specific implementation, the pixel driving circuit can be used as a basis for expansion and design of other driving circuits for use. The pixel driving circuits obtained based on this also fall within the protection scope of the present invention.

[0068] An embodiment of the present invention further discloses a display panel, which includes the pixel driving circuit disclosed in any of the above embodiments. The detailed structural features and advantages of the pixel driving circuit can be found in the description of the above embodiments and will not be repeated here.

[0069] In an optional embodiment, the display panel has multiple light-emitting elements. The solution of the present application can improve the problem of uneven display caused by uneven brightness of the multiple light-emitting elements, reduce the visual flicker, and thus improve the display effect.

[0070] Some embodiments of the present disclosure further provide a display device, which includes the above-mentioned display panel.

[0071] The display device provided by the embodiments of the present disclosure can be any device that displays an image, whether in motion (e.g., video) or fixed (e.g., still image), and whether text or text. More specifically, it is expected that the above embodiments can be implemented in or associated with a variety of electronic devices. The above-mentioned various electronic devices are, for example, (but not limited to) mobile phones, wireless devices, personal data assistants (PDAs), handheld or portable computers, GPS receivers / navigators, cameras, MP4 video players, cameras, game consoles, watches, clocks, calculators, television monitors, flat-panel displays, computer monitors, car displays (e.g., odometer displays, etc.), navigators, cockpit controls and / or displays, displays of camera views (e.g., displays of rearview cameras in vehicles), electronic photos, electronic billboards or signs, projectors, architectural structures, packaging and aesthetic structures, etc.

[0072] In summary, the pixel driving method and driving circuit, display panel, and display device of the present invention have at least the following advantages:

[0073] The pixel driving method and driving circuit, display panel and display device disclosed in the embodiments of the present invention adjust the pulse width of the first scanning signal under low brightness conditions in the initial light-emitting stage; and set different working timings for the first scanning signal according to different display brightnesses, so that the light-emitting element can quickly light up in the initial light-emitting stage under low brightness conditions, reducing the early light-up time in each frame period under low brightness conditions, making the light-up time under different display brightnesses the same, and improving the low-frequency flicker problem of OLED products.

[0074] The above is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention should not be considered to be limited to these descriptions. For those skilled in the art of the present invention, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should be considered to fall within the scope of protection of the present invention.

Claims

1. A pixel driving method, characterized in that, Applied to a pixel driving circuit, the pixel driving circuit includes a light-emitting element, a first switching device for transmitting a driving current to the light-emitting element, and a reset transistor connected to the anode of the light-emitting element; the first switching device is connected to a first scan signal; the method includes the steps of: Providing a display panel; the display panel includes a plurality of sub-pixels; Determining an initial light-emitting stage of each frame period of the sub-pixels; Obtaining a display brightness value of the display panel; Obtaining a pulse width of the first scan signal when the display brightness value is greater than or equal to a first preset threshold in the initial light-emitting stage, as a first pulse width; In response to the display brightness value being less than the first preset threshold in the initial light-emitting stage, reducing the pulse width of the first scan signal to be equal to the first pulse width.

2. The pixel driving method according to claim 1, characterized in that, The method further includes the steps of: Determining an effective light-emitting stage of each frame period of the sub-pixels; In response to the display brightness value being less than the first preset threshold in the effective light-emitting stage, adjusting the pulse width of the first scan signal to be greater than the first pulse width.

3. The pixel driving method according to claim 1, characterized in that, The reset transistor is connected to an initial reset signal; the method further includes the steps of: Increasing the pulse width of the initial reset signal in the initial light-emitting stage.

4. The pixel driving method according to claim 1, wherein The reset transistor is connected to an initial reset signal, the method further includes the steps of: Reducing the number of times the reset transistor is turned on in the initial light-emitting stage.

5. The pixel driving method according to claim 1, characterized in that In the initial light-emitting stage, the pulse waveform of the first scan signal when the display brightness value is less than the first preset threshold is the same as its pulse waveform when the display brightness value is greater than or equal to the first preset threshold.

6. The pixel driving method according to claim 3, wherein The increasing the pulse width of the initial reset signal in the initial light-emitting stage includes: Obtaining the pulse waveform of the initial reset signal before adjustment as a reference pulse waveform; Based on the reference pulse waveform, increasing the pulse width of the initial reset signal in the initial light-emitting stage.

7. The pixel driving method according to claim 6, wherein The method further includes the steps of: Determining an effective light-emitting stage of each frame period of the sub-pixels; Setting the pulse waveform of the initial reset signal in the effective light-emitting stage to be the same as the pulse waveform of the reference pulse waveform in the effective light-emitting stage.

8. The pixel driving method according to claim 1, wherein The reset transistor is further connected to a first reference voltage signal, the pixel driving circuit further includes a driving transistor, and the driving transistor is respectively connected to a second reference voltage signal and the first switching device.

9. A pixel driving circuit, characterized in that, The pixel driving circuit includes a light-emitting element, a first switching device for transmitting a driving current to the light-emitting element, and a reset transistor connected to the anode of the light-emitting element; the first switching device is connected to a first scan signal; the pixel driving circuit is driven based on the pixel driving method according to any one of claims 1-8.

10. A display panel, characterized in that, The display panel includes the pixel driving circuit according to claim 9.

11. A display device, characterized in that, Including the display panel according to claim 10.

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