Display panel, driving method thereof and display device

Abstract

The invention provides a display panel, a driving method thereof and a display device, and relates to the technical field of display, the display panel comprises a plurality of light-emitting devices, anodes of the light-emitting devices are electrically connected with first reset signals, cathodes of the light-emitting devices are electrically connected with first power supply voltage signals, the first reset signals are used for resetting the anodes of the light-emitting devices, and the first power supply voltage signals are used for resetting the cathodes of the light-emitting devices. The first power supply voltage signal is used for providing a voltage signal for the cathode of the light-emitting device; the display panel comprises a plurality of brightness levels; the driving method of the display panel comprises the steps that when the brightness level of the display panel changes, a first reset signal and a first power supply voltage signal start to be switched at the same time. Through the arrangement, the time difference between the first reset signal effective moment and the first power supply voltage signal effective moment is shortened, so that the splash screen phenomenon of the display panel is improved, the display effect of the display panel is improved, and the use experience of a user is improved.

Description

Technical Field

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

[0002] With the development of display technology, people have higher and higher requirements on the performance of display panels. In the related art, when the display panel adjusts the display brightness level, there is a sudden change in display brightness, that is, a flickering phenomenon, which seriously affects the display effect of the display panel.

[0003] Therefore, how to improve the above problems has become one of the technical issues that need to be solved urgently at this stage. Summary of the invention

[0004] In order to solve the above technical problems, the present disclosure provides a display panel and a driving method thereof, and a display device, so as to improve the screen flickering phenomenon of the display panel when the brightness level of the display panel changes.

[0005] In a first aspect, the present disclosure provides a method for driving a display panel, wherein the display panel comprises a plurality of light-emitting devices, wherein an anode of the light-emitting device is electrically connected to a first reset signal, and a cathode of the light-emitting device is electrically connected to a first power supply voltage signal, wherein the first reset signal is used to reset the anode of the light-emitting device, and the first power supply voltage signal is used to provide a voltage signal for the cathode of the light-emitting device;

[0006] The display panel includes a plurality of brightness levels;

[0007] The driving method of the display panel includes:

[0008] When the brightness level of the display panel changes, the first reset signal and the first power supply voltage signal start switching simultaneously.

[0009] In a second aspect, the present disclosure provides a display panel driven by the display panel driving method described in the first aspect.

[0010] In a third aspect, the present disclosure provides a display device, including the display panel according to the second aspect,

[0011] The display panel comprises a plurality of light emitting devices, wherein the anodes of the light emitting devices are electrically connected to a first reset signal, and the cathodes are electrically connected to a first power supply voltage signal, wherein the first reset signal is used to reset the anodes of the light emitting devices, and the first power supply voltage signal is used to provide a voltage signal for the cathodes of the light emitting devices;

[0012] The display panel includes a plurality of brightness levels;

[0013] a power management integrated circuit, the first power supply voltage signal being electrically connected to the power management integrated circuit, and the power management integrated circuit adjusting the first power supply voltage signal when the brightness level of the display panel changes;

[0014] A driving chip, wherein the first reset signal is electrically connected to the driving chip, and when the brightness level of the display panel changes, the driving chip adjusts the first reset signal.

[0015] Compared with the prior art, the technical solution provided by the embodiments of the present disclosure has the following advantages:

[0016] The present disclosure provides a display panel and a driving method thereof, and a display device, wherein the display panel includes a plurality of light-emitting devices, the anode of the light-emitting device is electrically connected to a first reset signal, the cathode is electrically connected to a first power supply voltage signal, the first reset signal is used to reset the anode of the light-emitting device, and the first power supply voltage signal is used to provide a voltage signal for the cathode of the light-emitting device; the display panel includes a plurality of brightness levels; the driving method of the display panel includes: when the brightness level of the display panel changes, the first reset signal and the first power supply voltage signal start to switch at the same time. Such a setting is conducive to shortening the time difference between the effective moment of the first reset signal and the effective moment of the first power supply voltage signal, thereby helping to improve the screen flickering phenomenon of the display panel, improve the display effect of the display panel, and enhance the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0019] Figure 1 Shown is a schematic diagram of a display panel provided by an embodiment of the present disclosure;

[0020] Figure 2 Shown is a connection schematic diagram of a light emitting device provided by an embodiment of the present disclosure;

[0021] Figure 3 The figure shows a timing diagram of a display panel driving method in the prior art;

[0022] Figure 4 FIG. 1 is a timing diagram of a method for driving a display panel provided by an embodiment of the present disclosure;

[0023] Figure 5 FIG. 1 is a schematic diagram of a driving circuit of a light emitting device provided by an embodiment of the present disclosure;

[0024] Figure 6 Shown Figure 5 A timing diagram of the driving circuit in FIG.

[0025] Figure 7 FIG. 1 is a timing diagram of another display panel driving method provided by an embodiment of the present disclosure;

[0026] Figure 8 FIG. 1 is a timing diagram of another display panel driving method provided by an embodiment of the present disclosure;

[0027] Fig. 9 Shown is a schematic diagram of a display device provided by an embodiment of the present disclosure. DETAILED DESCRIPTION

[0028] In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0029] In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present disclosure, rather than all of the embodiments.

[0030] The inventors discovered during their research that when some display panels are used in different scenarios, when the brightness bar of the entire device is dragged, that is, when the brightness level of the display panel changes, the display panel will experience a screen flash at the moment of brightness switching, which seriously affects the display effect of the display panel and the user experience.

[0031] Therefore, how to improve the screen flickering phenomenon of the display panel when the brightness level of the display panel changes has become one of the technical problems that need to be solved urgently at this stage.

[0032] In view of this, the present disclosure provides a display panel and a driving method thereof, and a display device, so as to improve the screen flickering phenomenon of the display panel when the brightness level of the display panel changes.

[0033] Figure 1 FIG. 1 is a schematic diagram of a display panel provided by an embodiment of the present disclosure. Figure 2 FIG. 1 is a connection diagram of a light emitting device provided by an embodiment of the present disclosure. Figure 3 FIG. 1 is a timing diagram of a display panel driving method in the prior art. Figure 4FIG. 1 is a timing diagram of a driving method of a display panel provided by an embodiment of the present disclosure. Please refer to FIG. Figure 1 to Figure 3 The present disclosure provides a driving method of a display panel 100, wherein the display panel 100 includes a plurality of light-emitting devices D0, wherein the anode of the light-emitting device D0 is electrically connected to a first reset signal Vref1, and the cathode is electrically connected to a first power supply voltage signal PVEE, wherein the first reset signal Vref1 is used to reset the anode of the light-emitting device D0, and the first power supply voltage signal PVEE is used to provide a voltage signal for the cathode of the light-emitting device D0;

[0034] The display panel 100 includes multiple brightness levels;

[0035] The driving method of the display panel 100 includes:

[0036] When the brightness level of the display panel 100 changes, the first reset signal Vref1 and the first power voltage signal PVEE start to switch simultaneously.

[0037] It should be noted that the drawings of the present disclosure are only illustrated by taking the rectangular display panel 100 and the array arrangement of the light-emitting device D0 as examples, and are not limited thereto, nor do they represent the actual size and structure of the display panel 100. The working mode of the display panel 100 generally includes different brightness modes. For example, the working mode of the display panel 100 includes a high brightness mode to meet the user's requirement that the display screen has a higher display brightness; at the same time, the working mode of the display panel 100 includes a low brightness mode to meet the user's requirement that the display screen has a lower display brightness. Therefore, the display panel 100 includes a plurality of brightness levels (Display Brightness Value, DBV). By adjusting the brightness level of the display panel 100, the overall brightness of the display panel 100 can be adjusted, so that the display panel 100 can meet the display modes of different brightness required by the user.

[0038] The display panel 100 includes a plurality of light emitting devices D0, and the anode and cathode of the light emitting device D0 are electrically connected to the first reset signal Vref1 and the first power supply voltage signal PVEE respectively. The first power supply voltage signal PVEE is used to provide a voltage signal for the cathode of the light emitting device D0, please refer to Figure 3In the related art, when the brightness level of the display panel 100 changes, the voltage of the first power supply voltage signal PVEE will change accordingly, and the switching process of the first power supply voltage signal PVEE is a process of gradual voltage change. The first reset signal Vref1 is used to provide a signal to the anode of the light-emitting device D0. When the brightness level of the display panel 100 changes, the voltage of the first reset signal Vref1 is directly switched to a preset voltage. The effective moment after the voltage switching of the first power supply voltage signal PVEE is in the effective display stage ACT of the display panel 100. The switching moment of the first reset signal Vref1 is in the front and back porch stage Porch. The voltage switching moment of the first reset signal Vref1 is much earlier than the voltage switching moment of the first power supply voltage signal PVEE, which will affect the normal display of the display panel 100 in the effective display stage ACT, and the display panel 100 will have an obvious screen flickering phenomenon.

[0039] Please refer to Figure 1 , Figure 2 and Figure 4 The driving method of the display panel 100 provided in the present disclosure includes: when the brightness level of the display panel 100 changes, the first reset signal Vref1 and the first power supply voltage signal PVEE start to switch at the same time, which is beneficial to shorten the time difference between the effective moment of the first reset signal Vref1 and the effective moment of the first power supply voltage signal PVEE, thereby improving the screen flickering phenomenon of the display panel 100, improving the display effect of the display panel 100, and enhancing the user experience.

[0040] It should be noted that this disclosure only Figure 4 The illustrated embodiment is used for illustration and will be described in detail in subsequent embodiments.

[0041] In order to more clearly illustrate the driving principle of the light emitting device D0, optionally, the present disclosure provides an implementation of a driving circuit of the light emitting device D0. Figure 5 FIG. 1 is a schematic diagram of a driving circuit of a light emitting device provided in an embodiment of the present disclosure. Please refer to FIG. Figure 5The driving circuit 000 is electrically connected to the light emitting device D0, and the driving circuit 000 includes: a first transistor M1, a second transistor M2, a third transistor M3, a fourth transistor M4, a fifth transistor M5, a sixth transistor M6, a seventh transistor M7 and a capacitor C, wherein the first electrode and the second electrode of the seventh transistor M7 are respectively connected to the first reset signal Vref1 and the anode of the light emitting device D0, for resetting the anode of the light emitting device D0; the cathode of the light emitting device D0 is connected to the first power supply voltage signal PVEE, the third transistor M3 is a driving transistor, for providing a driving current for the light emitting device D0, and the gate, the first electrode and the second electrode of the driving transistor are respectively connected to the first node N1, the second node N2 and the third node N3. The first electrode and the second electrode of the first transistor M1 are respectively connected to the second power supply voltage signal PVDD and the second node N2, and are used to transmit the second power supply voltage signal PVDD to the first electrode of the driving transistor; the first electrode and the second electrode of the second transistor M2 are respectively connected to the data voltage signal Vdata and the second node N2, and are used to transmit the data voltage signal Vdata to the second node N2; the first electrode and the second electrode of the fourth transistor M4 are respectively connected to the first node N1 and the third node N3, and are used to perform threshold compensation on the third transistor M3; the first electrode and the second electrode of the fifth transistor M5 are respectively connected to the second reset signal Vref2 and the first node N1, and are used to provide the second reset signal Vref2 to the first node N1; the first electrode and the second electrode of the sixth transistor M6 are respectively connected to the third node N3 and the first electrode of the light-emitting device D0, and are used to transmit the driving current to the light-emitting device D0.

[0042] Figure 6 Shown Figure 5 A timing diagram of the driving circuit in Figure 5 and Figure 6, the specific working process of the driving circuit 000 includes an initialization stage T1, a data writing stage T2 and a light emitting stage T3; in the initialization stage T1, the fifth transistor M5 is turned on, and the second reset signal Vref2 is transmitted to the control end of the third transistor M3 for initialization, so that the residual charge of the previous frame can be eliminated to improve the display effect of the display panel. In the data writing stage T2, the fifth transistor M5 is turned off, the second transistor M2, the fourth transistor M4 and the seventh transistor M7 are turned on, and the data voltage signal Vdata is written into the third transistor M3. The fourth transistor M4 is connected between the gate and the second electrode of the third transistor M3, and the threshold voltage of the third transistor M3 can be captured to the gate of the third transistor M3 to achieve threshold voltage compensation; at the same time, the seventh transistor M7 transmits the first reset signal Vref1 to the anode of the light emitting device D0 for reset, which can clear the residual charge of the previous frame, so that the light emitting device D0 can more accurately display the brightness to be displayed, thereby improving the display effect of the display panel 100; it should be noted that the reset process of the light emitting device D0 can also be performed in the initialization stage T1, and the present disclosure is not limited to this. Furthermore, the capacitor C is connected between the gate of the third transistor M3 and the first electrode of the first transistor M1, and can maintain the potential of the first node N1. In the light-emitting stage T3, the second transistor M2, the fourth transistor M4, the fifth transistor M5 and the seventh transistor M7 are all turned off, the first transistor M1, the third transistor M3 and the sixth transistor M6 are all turned on, and the driving current is transmitted to the first electrode of the light-emitting device D0, and the light-emitting device D0 emits light. It should be noted that the present disclosure is only based on Figure 5 Take the drive circuit as an example to explain. Figure 6 The timing diagram is only for illustration and is not intended to be limiting. In some other embodiments of the present disclosure, the driving circuit may also be embodied as other feasible structures. At the same time, the present disclosure does not limit the type of transistors in the driving circuit.

[0043] According to the basic principle of the light-emitting device D0, it can be concluded that when the brightness level of the display panel 100 changes, the first reset signal Vref1 and the first power supply voltage signal PVEE are switched simultaneously, which is beneficial to stabilize the voltage difference between the anode and the cathode of the light-emitting device D0, thereby improving the screen flickering phenomenon of the display panel 100, improving the display effect of the display panel 100, and enhancing the user experience.

[0044] Figure 7 FIG. 1 is a timing diagram of another display panel driving method provided by an embodiment of the present disclosure. Figure 1 , Figure 2 and Figure 7 In an optional implementation of the present disclosure, the switching process of the first reset signal Vref1 and the first power supply voltage signal PVEE is the same.

[0045] Specifically, in the present embodiment, the switching of the first reset signal Vref1 and the first power supply voltage signal PVEE is linked, that is, the first reset signal Vref1 follows the switching process of the first power supply voltage signal PVEE, the switching process of the first power supply voltage signal PVEE is gradually generated, and the switching process of the first reset signal Vref1 is also gradually generated. This is beneficial to stabilize the voltage difference between the anode and cathode of the light-emitting device D0, thereby improving the screen flickering phenomenon of the display panel 100, improving the display effect of the display panel 100, and enhancing the user experience.

[0046] Please continue to refer to Figure 1 , Figure 2 and Figure 7 , further, the present disclosure provides an optional implementation mode that the display panel 100 includes a voltage switching stage S1, in which the first power supply voltage signal PVEE is adjusted from the first sub-power supply voltage value VP1 to the second sub-power supply voltage value VP2, and the first reset signal Vref1 is adjusted from the first sub-reset voltage value VV1 to the second sub-reset voltage value VV2;

[0047] At the start of the voltage switching phase S1 , the voltage of the first power supply voltage signal PVEE is equal to the first sub-power supply voltage value VP1 , and the voltage of the first reset signal Vref1 is equal to the first sub-reset voltage value VV1 ;

[0048] At the end of the voltage switching phase S1 , the voltage of the first power voltage signal PVEE is equal to the second sub power voltage value VP2 , and the voltage of the first reset signal Vref1 is equal to the second sub reset voltage value VV2 .

[0049] It should be noted that the voltage switching stage S1 is a period from the beginning to the completion of the switching of the first power voltage signal PVEE and the first reset signal Vref1 when the display panel 100 switches the brightness level.

[0050] Specifically, when the display panel 100 switches the brightness level, the display panel 100 enters the voltage switching stage S1. In the voltage switching stage S1, the first power supply voltage signal PVEE completes voltage switching and is adjusted from the first sub-power supply voltage value VP1 to the second sub-power supply voltage value VP2, wherein the first sub-power supply voltage value VP1 is the voltage value of the first power supply voltage signal PVEE before adjustment, and the second sub-power supply voltage value VP2 is the target voltage value after adjustment. In the voltage switching stage S1, the first reset signal Vref1 completes voltage switching and is adjusted from the first sub-reset voltage value VV1 to the second sub-reset voltage value VV2, wherein the first sub-reset voltage value VV1 is the voltage value of the first reset signal Vref1 before adjustment, and the second sub-reset voltage value VV2 is the target voltage value after adjustment. At the start time of the voltage switching stage S1, the voltage of the first power supply voltage signal PVEE is equal to the first sub-power supply voltage value VP1, and the voltage of the first reset signal Vref1 is equal to the first sub-reset voltage value VV1, that is, the first reset signal Vref1 and the first power supply voltage signal PVEE start to adjust the voltage at the same time. At the end of the voltage switching stage S1, the voltage of the first power supply voltage signal PVEE is equal to the second sub-power supply voltage value VP2, and the voltage of the first reset signal Vref1 is equal to the second sub-reset voltage value VV2, that is, at the end of the voltage switching stage S1, the first power supply voltage signal PVEE is adjusted to the target voltage, and the first reset signal Vref1 is also adjusted to the target voltage, that is, the first reset signal Vref1 and the first power supply voltage signal PVEE complete the voltage switching at the same time. With this arrangement, the voltage difference between the anode and cathode of the light-emitting device D0 can be kept consistent or basically consistent before and after the adjustment, which is beneficial to stabilizing the voltage difference between the anode and cathode of the light-emitting device D0, thereby helping to improve the screen flickering phenomenon of the display panel 100, improve the display effect of the display panel 100, and enhance the user experience.

[0051] Furthermore, the present disclosure provides another optional implementation mode, in which, within a sub-period within the voltage switching stage S1, the voltage difference between the first power supply voltage signal PVEE and the first reset signal Vref1 remains consistent, that is, the first reset signal Vref1 completely "copies" the generation trajectory of the first power supply voltage signal PVEE, which is further beneficial to maintaining the voltage difference between the anode and cathode of the light-emitting device D0, and is more beneficial to improving the screen flickering phenomenon of the display panel 100.

[0052] Please refer to Figure 1 , Figure 2 and Figure 4 In an optional embodiment of the present disclosure, the display stage of the display panel 100 includes an effective display stage ACT and a front and rear porch stage Porch;

[0053] The switching moment of the first reset signal Vref1 and the first power voltage signal PVEE is in the front and back porch stage Porch.

[0054] Specifically, the front and back porch stage Porch is the corresponding pre-charging stage in each driving cycle. In this stage, the sub-pixels in the display panel 100 will not be scanned, that is, the light-emitting device D0 will not be driven; the effective display stage ACT is the time period for actually scanning the sub-pixels in the display panel 100. In this stage, the light-emitting device D0 in the display panel 100 is driven to emit light. In this embodiment, the first reset signal Vref1 and the first power supply voltage signal PVEE are switched in the front and back porch stage Porch. In the front and back porch stage Porch, the display panel 100 is not in an effective display state. Switching the first reset signal Vref1 and the first power supply voltage signal PVEE in the front and back porch stage Porch is conducive to reducing the impact on the display effect of the display panel 100, reducing the occurrence of the flickering problem, and improving the display effect.

[0055] It should be noted that, in some optional implementations, the switching of the first power supply voltage signal PVEE is usually in the effective display stage ACT. This embodiment is equivalent to extending the duration of the front and rear corridor period Porch, so that the first power supply voltage signal PVEE completes the switching in the front and rear corridor period Porch.

[0056] For further information, please refer to Figure 1 , Figure 2 and Figure 4 , the present disclosure provides an optional implementation mode that the display panel 100 includes a first power supply voltage signal switching stage S11, in which the first power supply voltage signal is adjusted from a first sub-power supply voltage value VP1 to a second sub-power supply voltage value VP2;

[0057] The duration of the first power supply voltage signal switching phase S11 is less than or equal to the duration of a single front and rear corridor phase Porch.

[0058] Specifically, the display panel 100 includes a first power supply voltage signal switching stage S11. When the brightness level of the display panel 100 changes, in the first power supply voltage signal switching stage S11, the first power supply voltage signal PVEE completes voltage adjustment, and is adjusted from the first sub-power supply voltage value VP1 to the second sub-power supply voltage value VP2. The first sub-power supply voltage value VP1 is the voltage before adjustment, and the second sub-power supply voltage value VP2 is the target voltage. In order to complete the switching of the first power supply voltage signal PVEE in the front and back corridor stages Porch, the present embodiment is configured such that the duration of the first power supply voltage signal PVEE switching stage is less than or equal to the duration of a single front and back corridor stage Porch. In this way, the first power supply voltage signal PVEE completes the switching in the front and back corridor stages Porch, which is beneficial to reduce the influence of voltage switching on the effective display stage ACT, thereby improving the display effect of the display panel 100.

[0059] Please continue to refer to Figure 1 , Figure 2 and Figure 4 In an optional implementation of the present disclosure, at the end of the front and back porch stage Porch, the voltage value of the first power supply voltage signal PVEE is equal to the second sub-power supply voltage value VV2.

[0060] Specifically, in some embodiments, due to the communication protocol requirements of the power management integrated circuit 20 of the display device 200, the voltage of the first power voltage signal PVEE cannot be generated in the front and back corridor stage Porch. Therefore, at the end time of the front and back corridor stage Porch, the voltage of the first power voltage signal PVEE is adjusted to the second sub-power supply value VV2, that is, at the end time of the front and back corridor stage Porch, the first power voltage signal PVEE completes the switching. In this way, the communication protocol requirements of the power management integrated circuit 20 can be met, and the impact on the effective display stage ACT of the display panel 100 is reduced, which is beneficial to reducing the impact on the display effect of the display panel 100, reducing the occurrence of screen flickering problems, and improving the display effect.

[0061] Please continue to refer to Figure 1 , Figure 2 and Figure 4 , in an optional embodiment of the present disclosure, includes a first reset signal Vref1 generation time, the first reset signal Vref1 generation time is located at the start time of the first power supply voltage signal switching phase S11;

[0062] At the time when the first reset signal Vref1 is generated, the voltage of the first reset signal Vref1 is equal to the second sub-reset voltage value VV2.

[0063] Specifically, in this embodiment, the first power supply voltage signal switching stage S11 overlaps with the front and back corridor stage Porch, and the first power supply voltage signal switching stage S11 is in the front and back corridor stage Porch, that is, in the front and back corridor stage Porch, the first power supply voltage signal PVEE starts to switch. The generation mode of the first reset signal Vref1 adopts a direct generation mode. At the moment when the first reset signal Vref1 is generated, the first reset signal Vref1 starts to switch and completes the switching, switching to the second sub-reset voltage value VV2, and the second sub-reset voltage value VV2 is the target voltage. In this way, at the end of the front and back corridor stage Porch, the first power supply voltage signal PVEE and the first reset signal Vref1 can both complete the switching, and the front and back corridor stage Porch will not scan the pixels in the display panel 100. Therefore, switching the first power supply voltage signal PVEE and the first reset signal Vref1 at this stage is conducive to reducing the impact on the display effect of the display panel 100 and improving the screen flickering phenomenon when the brightness level of the display panel 100 is switched.

[0064] Figure 8 FIG. 1 is a timing diagram of another display panel driving method provided by an embodiment of the present disclosure. Please refer to FIG. Figure 1 , Figure 2 and Figure 8 , the present disclosure provides another optional implementation mode, when the brightness level of the display panel 100 changes, the first power supply voltage signal PVEE is switched in the front and back porch stage Porch, and the first reset signal Vref1 is also switched in the front and back porch stage Porch. At the same time, the switching process of the first power supply voltage signal PVEE and the first reset signal Vref1 is the same, both are gradual change modes, the first power supply voltage signal PVEE is adjusted from the first sub-power supply voltage value VP1 to the second sub-power supply voltage value VP2; the first reset signal Vref1 is adjusted from the first sub-reset voltage value VV1 to the second sub-reset voltage value VV2. At the end of the front and back porch stage, the voltage of the first power supply voltage signal PVEE is equal to the second sub-power supply voltage value VP2, and the voltage of the first reset signal Vref1 is equal to the second sub-reset voltage value VV2. In this embodiment, the switching process of the first power supply voltage signal PVEE and the first reset signal Vref1 is the same, and the switching is performed in the front and rear porch stages Porch, which is not only beneficial to reducing the impact on the effective display stage ACT of the display panel 100, but also beneficial to stabilizing the voltage difference between the anode and cathode of the light-emitting device D0, and further beneficial to improving the screen flickering phenomenon of the display panel 100, improving the display effect of the display panel 100, and enhancing the user experience.

[0065] Based on the same inventive concept, the present disclosure provides a display panel, please refer to Figure 1 , Figure 2 and Figure 4The display panel 100 is driven by any display panel driving method provided in the embodiments of the present disclosure.

[0066] It should be noted that the embodiment of the display panel 100 provided by the present disclosure can refer to the embodiment of the driving method of the display panel provided by the present disclosure, and it will not be repeated. When the brightness level of the display panel 100 provided by the present disclosure changes, the switching of the first power supply voltage signal PVEE and the first reset signal Vref1 has little effect on the effective display phase ACT of the display panel 100, which is conducive to improving the display effect of the display panel 100, thereby improving the user experience.

[0067] Based on the same inventive concept, the present disclosure also provides a display device, Fig. 9 FIG. 1 is a schematic diagram of a display device provided by an embodiment of the present disclosure, please refer to FIG. Figure 1 , Figure 2 , Figure 4 and Fig. 9 The display device 200 includes a display panel 100 provided in an embodiment of the present disclosure, and the display panel 100 includes a plurality of light-emitting devices D0, wherein the anode of the light-emitting device D0 is electrically connected to a first reset signal Vref1, and the cathode is electrically connected to a first power supply voltage signal PVEE, wherein the first reset signal Vref1 is used to reset the anode of the light-emitting device D0, and the first power supply voltage signal PVEE is used to provide a voltage signal for the cathode of the light-emitting device D0;

[0068] The display panel 100 includes multiple brightness levels;

[0069] The power management integrated circuit 20, the first power voltage signal PVEE is electrically connected to the power management integrated circuit 20, and when the brightness level of the display panel 100 changes, the power management integrated circuit 20 adjusts the first power voltage signal PVEE;

[0070] The driving chip 10 , the first reset signal Vref1 is electrically connected to the driving chip 10 , and when the brightness level of the display panel 100 changes, the driving chip 10 adjusts the first reset signal Vref1 .

[0071] Specifically, the display device 200 provided by the present disclosure includes the display panel 100 provided by the embodiment of the present disclosure, and the display panel 100 is driven by the driving method of the display panel provided by the embodiment of the present disclosure. The display panel 100 includes a plurality of light-emitting devices D0, and the anode and cathode of the light-emitting device D0 are electrically connected to the first reset signal Vref1 and the first power supply voltage signal PVEE respectively. The display panel 100 includes a plurality of brightness levels, and the first power supply voltage signal PVEE is used to provide a voltage signal for the cathode of the light-emitting device D0. When the brightness level of the display panel 100 changes, the voltage of the first power supply voltage signal PVEE will change accordingly. The first reset signal Vref1 is used to provide a signal for the anode of the light-emitting device D0. When the brightness level of the display panel 100 changes, the voltage of the first reset signal Vref1 will also change. The display panel 100 also includes a power management integrated circuit 20 and a driver chip 10. The driver chip 10 transmits the first reset signal Vref1 to the light-emitting device D0 through the first reset signal line 21, and the power management integrated circuit 20 transmits the first power supply voltage signal PVEE to the light-emitting device D0 through the first power supply voltage signal line 11. When the brightness level of the display panel 100 changes, the power management integrated circuit 20 adjusts the first power voltage signal PVEE, and the driver chip 10 adjusts the first reset signal Vref1. When the brightness level of the display panel 100 changes, the power management integrated circuit 20 and the driver chip 10 start switching at the same time, which is beneficial to shorten the time difference between the effective moment of the first reset signal Vref1 and the effective moment of the first power voltage signal PVEE, thereby improving the screen flickering phenomenon of the display panel 100, improving the display effect of the display panel 100, and enhancing the user experience.

[0072] It should be noted that the embodiment of the present disclosure only takes the example that each column of light-emitting devices D0 is connected to the same first power supply voltage signal line 11, and the first power supply voltage signal line 11 is connected to the power management integrated circuit 20, and does not limit the wiring of the first power supply voltage signal line 11. For example, the first power supply voltage signal line 11 can also be a planar structure. Similarly, the embodiment of the present disclosure does not limit the specific wiring structure of the first reset signal line 21.

[0073] It should also be noted that the power management integrated circuit 20 (PMIC) of the display device 200 plays a vital role in the display device 200. The display device 200 usually requires a variety of different voltages to drive different parts of the display device 200, such as a pixel driving circuit, a gate driving circuit, etc. The power management integrated circuit 20 provides different stable voltages for the display device 200.

[0074] Please refer to Figure 1 , Figure 2 , Figure 7 and Fig. 9 In an optional embodiment of the present disclosure, when the brightness level of the display panel 100 changes,

[0075] The power management integrated circuit 20 controls the first power voltage signal PVEE to be adjusted from the first sub-power voltage value VP1 to the second sub-power voltage value VP2;

[0076] The driving chip 10 controls the first reset signal Vref1 to be adjusted from the first sub-reset voltage value VV1 to the second sub-reset voltage value VV2 .

[0077] Specifically, when the brightness level of the display panel 100 changes, the first power supply voltage signal PVEE and the first reset signal Vref1 need to be adjusted according to the brightness level. The power management integrated circuit 20 is used to adjust the first power supply voltage signal PVEE, and the driving chip 10 is used to adjust the first reset signal Vref1. The first sub-power supply voltage value VP1 is the voltage value before adjustment, and the second sub-power supply voltage value VP2 is the target power value. When the brightness level of the display panel 100 changes, the first power supply voltage signal PVEE is adjusted from the first sub-power supply voltage value VP1 to the second sub-power supply voltage value VP2. The first sub-reset voltage value VV1 is the voltage value before adjustment, and the second sub-reset voltage value VV2 is the voltage value before adjustment. When the brightness level of the display panel 100 changes, the first power supply voltage signal PVEE is adjusted from the first sub-reset voltage value VV1 to the second sub-power supply voltage value VV2. When the display panel 100 provided in the present disclosure is driven, at the start time of the voltage switching stage S1, the first reset signal Vref1 and the first power supply voltage signal PVEE start to adjust the voltage at the same time. At the end of the voltage switching stage S1, the first power supply voltage signal PVEE is adjusted to the target voltage, and the first reset signal Vref1 is also adjusted to the target voltage, that is, the first reset signal Vref1 and the first power supply voltage signal PVEE simultaneously complete the voltage switching. With this arrangement, the voltage difference between the anode and cathode of the light-emitting device D0 can remain consistent or substantially consistent before and after the adjustment, which is beneficial to stabilizing the voltage difference between the anode and cathode of the light-emitting device D0, thereby improving the screen flickering phenomenon of the display panel 100, improving the display effect of the display panel 100, and enhancing the user experience.

[0078] Please continue to refer to Figure 1 , Figure 2 , Figure 4 and Fig. 9 In an optional implementation of the present disclosure, the display stage of the display panel 100 includes an effective display stage ACT and a front and rear porch stage Porch;

[0079] The power management integrated circuit 20 adjusts the first power voltage signal PVEE in the front and back porch stages Porch;

[0080] The driving chip 10 adjusts the first reset signal Vref1 in the front and back porch stages.

[0081] Specifically, the display stage of the display panel 100 includes an effective display stage ACT and a front and back porch stage Porch. The front and back porch stage Porch is the corresponding pre-charging stage in each driving cycle. In this stage, the sub-pixels in the display panel 100 will not be scanned, that is, the light-emitting device D0 will not be driven; the effective display stage ACT is a time period for actually scanning the sub-pixels in the display panel 100. In this stage, the light-emitting device D0 in the display panel 100 is driven. In this embodiment, the power management integrated circuit 20 adjusts the first power supply voltage signal PVEE in the front and back porch stage Porch, and the driver chip 10 adjusts the first reset signal Vref1 in the front and back porch stage Porch. In the front and back porch stage Porch, the display panel 100 is not in an effective display state. In this way, switching in the front and back porch stage Porch is conducive to reducing the impact on the display effect of the display panel 100, reducing the occurrence of the flickering problem, and improving the display effect.

[0082] It can be seen from the above embodiments that the display panel and its driving method, and the display device provided by the present disclosure achieve at least the following beneficial effects:

[0083] The present disclosure provides a display panel and a driving method thereof, and a display device, wherein the display panel includes a plurality of light-emitting devices, the anode of the light-emitting device is electrically connected to a first reset signal, the cathode is electrically connected to a first power supply voltage signal, the first reset signal is used to reset the anode of the light-emitting device, and the first power supply voltage signal is used to provide a voltage signal for the cathode of the light-emitting device; the display panel includes a plurality of brightness levels; the driving method of the display panel includes: when the brightness level of the display panel changes, the first reset signal and the first power supply voltage signal start to switch at the same time. Such a setting is conducive to shortening the time difference between the effective moment of the first reset signal and the effective moment of the first power supply voltage signal, thereby helping to improve the screen flickering phenomenon of the display panel, improve the display effect of the display panel, and enhance the user experience.

[0084] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0085] The above description is only a specific embodiment of the present disclosure, so that those skilled in the art can understand or implement the present disclosure. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure will not be limited to the embodiments described herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for driving a display panel, characterized in that: The display panel comprises a plurality of light emitting devices, wherein the anodes of the light emitting devices are electrically connected to a first reset signal, and the cathodes are electrically connected to a first power supply voltage signal, wherein the first reset signal is used to reset the anodes of the light emitting devices, and the first power supply voltage signal is used to provide a voltage signal for the cathodes of the light emitting devices; The display panel includes a plurality of brightness levels; The driving method of the display panel includes: When the brightness level of the display panel changes, the first reset signal and the first power supply voltage signal start switching simultaneously.

2. The method for driving a display panel according to claim 1, wherein: The switching process of the first reset signal and the first power supply voltage signal is the same.

3. The method for driving a display panel according to claim 2, wherein: comprising a voltage switching stage, in which the first power supply voltage signal is adjusted from a first sub-power supply voltage value to a second sub-power supply voltage value, and the first reset signal is adjusted from a first sub-reset voltage value to a second sub-reset voltage value; At the start time of the voltage switching phase, the voltage of the first power supply voltage signal is equal to the first sub-power supply voltage value, and the voltage of the first reset signal is equal to the first sub-reset voltage value; At the end of the voltage switching phase, the voltage of the first power supply voltage signal is equal to the second sub-power supply voltage value, and the voltage of the first reset signal is equal to the second sub-reset voltage value.

4. The method for driving a display panel according to claim 1, wherein: The display stage of the display panel includes an effective display stage and a front and rear corridor stage; The switching moment of the first reset signal and the first power supply voltage signal is in the front and back corridor stage.

5. The method for driving a display panel according to claim 4, characterized in that: The method comprises a first power supply voltage signal switching stage, in which the first power supply voltage signal is adjusted from a first sub-power supply voltage value to a second sub-power supply voltage value; The duration of the first power supply voltage signal switching phase is less than or equal to the duration of a single front and back corridor phase.

6. The method for driving a display panel according to claim 5, characterized in that: At the end of the front and back corridor stages, the voltage value of the first power supply voltage signal is equal to the second sub-power supply voltage value.

7. The method for driving a display panel according to claim 5, characterized in that: Including a first reset signal generation time, the first reset signal generation time is located at the start time of the first power supply voltage signal switching phase; At the time when the first reset signal is generated, the voltage of the first reset signal is equal to the second sub-reset voltage value.

8. A display panel, characterized in that: The display panel is driven by the driving method of any one of claims 1 to 7.

9. A display device, characterized in that: comprising the display panel according to claim 8, The display panel comprises a plurality of light emitting devices, wherein the anodes of the light emitting devices are electrically connected to a first reset signal, and the cathodes are electrically connected to a first power supply voltage signal, wherein the first reset signal is used to reset the anodes of the light emitting devices, and the first power supply voltage signal is used to provide a voltage signal for the cathodes of the light emitting devices; The display panel includes a plurality of brightness levels; a power management integrated circuit, the first power supply voltage signal being electrically connected to the power management integrated circuit, and the power management integrated circuit adjusting the first power supply voltage signal when the brightness level of the display panel changes; A driving chip, wherein the first reset signal is electrically connected to the driving chip, and when the brightness level of the display panel changes, the driving chip adjusts the first reset signal.

10. The display device according to claim 9, characterized in that: When the brightness level of the display panel changes, The power management integrated circuit controls the first power supply voltage signal to be adjusted from a first sub-power supply voltage value to a second sub-power supply voltage value; The driving chip controls the first reset signal to be adjusted from a first sub-reset voltage value to a second sub-reset voltage value.

11. The display device according to claim 9, characterized in that The display stage of the display panel includes an effective display stage and a front and rear corridor stage; The power management integrated circuit adjusts the first power supply voltage signal during the front and back corridor stages; The driving chip adjusts the first reset signal in the front and back corridor stages.

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