Display panel, driving method thereof and display device

Abstract

The embodiment of the invention provides a display panel, a driving method thereof and a display device, relates to the technical field of display, and is used for improving the display uniformity of the display panel. The display panel comprises a plurality of sub-pixels; the sub-pixel receives a first light-emitting control signal; the display panel at least comprises first time and second time, and the first time is different from the second time; wherein the first time and the second time are light emitting time of different sub-pixels respectively; or the first time and the second time are starting time of the first light-emitting control signals of the different sub-pixels respectively; or the first time and the second time are the light emitting time of the same sub-pixel in different states; or, the first time and the second time are the starting time of the first light-emitting control signal of the same sub-pixel in different states.

Description

Technical Field

[0001] The present application 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 continuous development of science and technology, more and more display devices are widely used in people's daily life and work, becoming an indispensable tool for people today. Moreover, with the continuous development of display technology, consumers' requirements for displays are constantly increasing, and various types of displays are emerging in an endless stream, such as organic light emitting diode (OLED), sub-millimeter light emitting diode (Mini Light Emitting Diode, Mini LED), micro light emitting diode (Micro Light Emitting Diode, Micro LED) and other display technologies.

[0003] Currently, display panels have a display unevenness (Mura) problem. Summary of the invention

[0004] In view of this, the present application provides a display panel and a driving method thereof, and a display device to improve the display uniformity of the display panel.

[0005] In a first aspect, an embodiment of the present application provides a display panel, comprising a plurality of sub-pixels; the sub-pixels receive a first light emitting control signal;

[0006] The display panel includes at least a first time and a second time, and the first time is different from the second time; wherein,

[0007] The first time and the second time are respectively light-emitting times of different sub-pixels;

[0008] Or, the first time and the second time are respectively the turn-on time of the first light emitting control signal of different sub-pixels;

[0009] Or, the first time and the second time are light-emitting times of the same sub-pixel in different states respectively;

[0010] Alternatively, the first time and the second time are respectively the turn-on time of the first light emitting control signal of the same sub-pixel in different states.

[0011] In a second aspect, an embodiment of the present application provides a display device, comprising the above-mentioned display panel.

[0012] In a third aspect, an embodiment of the present application provides a method for driving a display panel, including:

[0013] The control display panel includes at least a first time and a second time, and the first time is different from the second time; wherein,

[0014] The first time and the second time are respectively light-emitting times of different sub-pixels;

[0015] Or, the first time and the second time are respectively the turn-on time of the first light emitting control signal of different sub-pixels;

[0016] Or, the first time and the second time are light-emitting times of the same sub-pixel in different states respectively;

[0017] Alternatively, the first time and the second time are respectively the turn-on time of the first light emitting control signal of the same sub-pixel in different states.

[0018] By adopting the solution provided in the embodiment of the present application, when the first time and the second time are respectively the light-emitting time of different sub-pixels in the display panel, or are respectively the turn-on time of the first light-emitting control signal of different sub-pixels in the display panel, the embodiment of the present invention can compensate for the brightness difference caused by factors such as different light-emitting moments of different sub-pixels or different threshold voltage offsets by making the first time different from the second time, which is beneficial to improving the display consistency of different areas of the display panel.

[0019] When the first time and the second time are the light-emitting times of the same sub-pixel in different states, or the first time and the second time are the turn-on times of the first light-emitting control signal of the same sub-pixel in different states, the embodiment of the present invention can avoid the flickering problem caused by different brightness of the display panel at different times by making the first time different from the second time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0021] Figure 1 A schematic diagram of a sub-pixel circuit provided by an embodiment of the present invention;

[0022] Figure 2 A working timing diagram of two different sub-pixels in a display panel provided by an embodiment of the present invention;

[0023] Figure 3 A schematic diagram of another sub-pixel circuit provided by an embodiment of the present invention;

[0024] Figure 4 Another working timing diagram of two different sub-pixels in a display panel provided by an embodiment of the present invention;

[0025] Figure 5 A schematic diagram of a circuit of another sub-pixel provided by an embodiment of the present invention;

[0026] Figure 6 for Figure 5 A working timing diagram of the pixel driving circuit shown;

[0027] Figure 7 for Figure 5 Another working timing diagram of the pixel driving circuit shown;

[0028] Figure 8 for Figure 5 Another working timing diagram of the pixel driving circuit shown;

[0029] Fig. 9 Another working timing diagram of two different sub-pixels in a display panel provided by an embodiment of the present invention

[0030] Fig.10 A schematic diagram of a display panel provided by an embodiment of the present invention;

[0031] Fig.11 A schematic diagram of a display unit provided by an embodiment of the present invention;

[0032] Fig.12 A schematic diagram of another display panel provided by an embodiment of the present invention;

[0033] Fig.13 A working timing diagram of a display panel provided by an embodiment of the present invention;

[0034] Fig.14 Another working timing diagram of a display panel provided by an embodiment of the present invention;

[0035] Fig.15 A working timing diagram of another display panel provided by an embodiment of the present invention;

[0036] Fig.16 A schematic diagram of a display device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0037] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0038] It should be clear that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0039] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0040] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0041] An embodiment of the present invention provides a display panel, the display panel comprising a plurality of sub-pixels. Figure 1 As shown, Figure 1 A circuit diagram of a sub-pixel provided in an embodiment of the present invention, the sub-pixel 1 includes an electrically connected pixel driving circuit 11 and a light-emitting element 12. Exemplarily, the light-emitting element 12 may be a light-emitting diode (Light Emitting Diode, referred to as LED), and the light-emitting diode includes a sub-millimeter light-emitting diode (Min i Light Emitting Diode, referred to as MiniLED), a micro light-emitting diode (Micro Light Emitting Diode, referred to as Micro LED) or an organic light-emitting diode (Organic Light Emitting Diode, referred to as OLED), etc., and may be designed according to actual conditions during specific implementation.

[0042] like Figure 1 As shown, the sub-pixel 1 receives the first light-emitting control signal EM; wherein the first light-emitting control signal EM can control the light-emitting time of the sub-pixel 1. When the first light-emitting control signal EM is at an enable level, the driving current generated by the pixel driving circuit 11 flows through the light-emitting element 12, and the light-emitting element 12 lights up. When the first light-emitting control signal EM is at a non-enable level, the driving current no longer flows through the light-emitting element 12, and the light-emitting element 12 is in an off state. The brightness of the light-emitting element 12 is related to the magnitude of the driving current flowing through it and the length of its light-emitting time in a frame period.

[0043] In an embodiment of the present invention, the display panel includes at least a first time and a second time, and the first time is different from the second time. Exemplarily, the first time and the second time are respectively the light-emitting time of different sub-pixels in the display panel. Taking the multiple sub-pixels in the display panel including the first sub-pixel and the second sub-pixel as an example, the light-emitting time of the first sub-pixel can be the first time, and the light-emitting time of the second sub-pixel can be the second time; the light-emitting time here refers to the light-emitting duration, which is the duration that the first light-emitting control signal EM is at the enable level within one frame period.

[0044] Or, the first time and the second time are respectively the turn-on time of the first light emitting control signal EM of different sub-pixels in the display panel; here, the turn-on time can be understood as the turn-on moment, that is, the moment when the first light emitting control signal EM switches from the non-enable level to the enable level. For example, when the enable level of the first light emitting control signal EM is at a low level, the turn-on time of the first light emitting control signal EM is the time at which its falling edge is located.

[0045] Or, the first time and the second time are the luminous time of the same sub-pixel in different states respectively; wherein different states may include different periods, illustratively, different periods include different frame periods; optionally, a frame period corresponding to a sub-pixel is a data refresh period. Alternatively, when a frame period includes multiple sub-frames, different periods may also be different sub-frames in a frame period. Taking the example that different states include the first state and the second state, the first time is the luminous time of the sub-pixel in the first state, and the second time is the luminous time of the same sub-pixel in the second state.

[0046] Or, the first time and the second time are the turn-on time of the first light emitting control signal EM of the same sub-pixel in different states. For example, the first time is the turn-on time of the first light emitting control signal EM provided to a certain sub-pixel in the first state, and the second time is the turn-on time of the first light emitting control signal EM provided to the sub-pixel in the second state different from the first state.

[0047] It should be noted here that the turn-on time of a signal refers to the time during which the signal jumps and remains in the turn-on state of the switch (ie, the thin film transistor) controlled by the signal.

[0048] In the case where the first time and the second time are respectively the light-emitting time of different sub-pixels in the display panel, or are respectively the turn-on time of the first light-emitting control signal of different sub-pixels in the display panel, the embodiment of the present invention can compensate for the brightness difference caused by factors such as different light-emitting time or different threshold voltage offset of different sub-pixels by making the first time different from the second time, so that the actual brightness of different sub-pixels tends to be consistent, which is conducive to improving the display consistency of different areas of the display panel. Among them, the actual brightness can be detected by a brightness detection instrument, and the actual brightness refers to the brightness displayed after taking into account the influencing factors such as different light-emitting time or threshold voltage drift of the sub-pixels.

[0049] When the first time and the second time are respectively the light-emitting time of the same sub-pixel in different states, or the first time and the second time are the turn-on time of the first light-emitting control signal of the same sub-pixel in different states, the embodiment of the present invention can make the actual brightness of the same sub-pixel in different states tend to be consistent by making the first time different from the second time, thereby avoiding the flicker problem caused by different brightness of the display panel at different times.

[0050] Exemplarily, at the same target grayscale, the first time is different from the second time. In other words, for sub-pixels in two different regions that are supposed to display the same target grayscale, they actually correspond to the first time and the second time respectively; or the same sub-pixel is supposed to display the same target grayscale in two different time states, which actually correspond to the first time and the second time respectively. That is, the difference between the first time and the second time refers to the difference in time under the common reference standard of the same target grayscale. Among them, the target grayscale is related to the image data received by the display panel, and the target grayscale can be regarded as the ideal grayscale that the sub-pixel is expected to achieve. The embodiment of the present invention can compensate for the brightness difference caused by factors such as different light-emitting moments or different threshold voltage offsets of the sub-pixels by making the first time and the second time under the same target grayscale different, improve the display consistency of different regions of the display panel, or avoid the flicker problem caused by different brightness of the display panel at different times. Of course, this may lead to the adjustment of the actual display grayscale or the luminous brightness perceived by the naked eye, thereby compensating for the brightness difference in different regions.

[0051] It should be noted that the determination of the target grayscale will be described in detail below and will not be repeated here.

[0052] When setting the pixel driving circuit 11, in an optional implementation, as Figure 1As shown, the pixel driving circuit 11 at least includes a driving transistor Tm, a data writing transistor M1, a light emitting control transistor M2 and a storage capacitor Cst. In one frame period, the operation process of the pixel driving circuit 11 includes a data writing phase and a light emitting phase. In the data writing phase, the data writing transistor M1 is turned on under the control of the scanning signal S to write the data signal DATA to the gate of the driving transistor Tm; in the light emitting phase, the light emitting control transistor M2 is turned on under the control of the first light emitting control signal EM, and the driving transistor Tm generates a driving current under the control of its gate voltage, and provides the driving current to the light emitting element 12.

[0053] To drive the light emitting element 12 to emit light, a first power signal PVDD and a second power signal PVEE need to be set. Optionally, the first power signal PVDD is a positive power voltage, and the second power signal PVEE is a negative power voltage. In the embodiment of the present invention, the driving current Id flowing through the light emitting element 12 satisfies: Id=K1(Vgs-Vth) 2 ; Wherein, K1 is a constant related to the characteristics of the driving transistor Tm, Vgs is the gate-source voltage difference of the driving transistor Tm, and Vth is the threshold voltage of the driving transistor Tm. In the embodiment of the present invention, Figure 1 As shown, the gate of the driving transistor Tm is electrically connected to the data signal line DATA, and the first electrode is electrically connected to the first power signal line PVDD. That is, the data signal DATA and the first power signal PVDD affect the driving current Id generated by the driving transistor Tm, thereby affecting the brightness of the light-emitting element 12. In the embodiment of the present invention, the duration of the first light-emitting control signal EM being at the enable level within a frame period can be adjusted to adjust the duration of the driving current Id flowing through the light-emitting element 12, thereby adjusting the light-emitting time of the light-emitting element 12 and achieving the adjustment of the brightness of the light-emitting element 12. Specifically, in the embodiment of the present invention, the turn-on time of the first light-emitting control signal EM being at the enable level can be adjusted to adjust the duration of the driving current Id flowing through the light-emitting element 12, thereby adjusting the light-emitting time of the light-emitting element 12 and adjusting the brightness of the light-emitting element 12.

[0054] For example, Figure 2 As shown, Figure 2 A working timing diagram of two different sub-pixels in a display panel provided by an embodiment of the present invention, wherein the two sub-pixels are respectively a first sub-pixel and a second sub-pixel, and both can adopt Figure 1 The circuit structure shown in Figure 2 In the figure, S1 is a scan signal provided to the first sub-pixel, S2 is a scan signal provided to the second sub-pixel, EM1 is a first light emitting control signal provided to the first sub-pixel, and EM2 is a first light emitting control signal provided to the second sub-pixel. Figure 2The enable level of the first light emitting control signal EM is taken as a low level for illustration. Figure 2 As shown, the light-emitting time of the first sub-pixel is a1, the light-emitting time of the second sub-pixel is a2, a1≠a2, Figure 2 Taking a1>a2 as an example, the brightness difference caused by the different light-emitting moments or the different threshold voltage shifts between the first sub-pixel and the second sub-pixel is compensated, thereby improving the display consistency of different areas of the display panel.

[0055] In another optional embodiment, if Figure 3 As shown, Figure 3 A circuit diagram of another sub-pixel provided in an embodiment of the present invention, wherein the pixel driving circuit 11 includes a driving transistor Tm, a data writing transistor M1, a gate reset transistor M3, a threshold compensation transistor M4, an electrode reset transistor M7, a first light emission control transistor M5, a second light emission control transistor M6 and a storage capacitor Cst. In one frame period, the operation process of the pixel driving circuit 11 at least includes a reset phase, a data writing phase and a light emission phase.

[0056] In the reset phase, the gate reset transistor M3 is turned on under the control of the second scan signal S2 to write the reset signal Ref into the gate of the driving transistor Tm, and the electrode reset transistor M7 is turned on under the control of the second scan signal S2 to write the reset signal Ref into the anode of the light emitting element 12.

[0057] In the data writing stage, the data writing transistor M1 and the threshold compensation transistor M4 are turned on under the control of the first scanning signal S1, the first data signal DATA is written into the gate of the driving transistor Tm and the threshold voltage of the driving transistor Tm is self-checked and compensated.

[0058] In the light emitting stage, the first light emitting control transistor M5 and the second light emitting control transistor M6 are turned on under the control of the first light emitting control signal EM, and the driving transistor Tm generates a driving current under the control of its gate voltage and provides the driving current to the light emitting element 12. The driving current Id satisfies Id=K2(V DATA -V PVDD ) 2 , K2 is a constant related to the characteristics of the driving transistor Tm, V DATA is the voltage value of the first data signal DATA, V PVDDis the voltage value of the first power signal PVDD. The embodiment of the present invention can adjust the duration of the driving current Id flowing through the light-emitting element 12 by adjusting the time that the first light-emitting control signal EM is at the enable level within a frame period, thereby adjusting the light-emitting time of the light-emitting element 12 and adjusting the brightness of the light-emitting element 12. Specifically, the embodiment of the present invention can adjust the time that the driving current Id flows through the light-emitting element 12 by adjusting the turn-on time of the enable level provided by the first light-emitting control signal EM, thereby adjusting the light-emitting time of the light-emitting element 12 and adjusting the brightness of the light-emitting element 12.

[0059] For example, Figure 4 As shown, Figure 4 Another working timing diagram of two different sub-pixels in a display panel provided by an embodiment of the present invention, the two sub-pixels are respectively a first sub-pixel and a second sub-pixel, and both can adopt Figure 3 The circuit structure shown in Figure 4 In the figure, S11 is a first scanning signal provided to the first sub-pixel, S12 is a second scanning signal provided to the first sub-pixel, EM1 is a first light-emitting control signal provided to the first sub-pixel; S21 is a first scanning signal provided to the second sub-pixel, S22 is a second scanning signal provided to the second sub-pixel, and EM2 is a first light-emitting control signal provided to the second sub-pixel. Figure 4 As shown, the light-emitting time of the first sub-pixel is a1, the light-emitting time of the second sub-pixel is a2, a1≠a2, Figure 4 Taking a1>a2 as an example, the brightness difference caused by the different light-emitting moments or the different threshold voltage shifts between the first sub-pixel and the second sub-pixel is compensated, thereby improving the display consistency of different areas of the display panel.

[0060] Understandably, Figure 1 and Figure 2 The pixel driving circuit 11 shown is only for schematic representation and is not intended to limit the present invention. The pixel driving circuit 11 in the display panel provided by the present invention can adopt any circuit structure that can change the duration of the driving current flowing through the light-emitting element 12 by adjusting the first light-emitting control signal.

[0061] For example, Figure 5 and Figure 6 As shown, Figure 5 A circuit diagram of another sub-pixel provided by an embodiment of the present invention, Figure 6 for Figure 5A working timing diagram of a pixel driving circuit is shown, the pixel driving circuit includes a second driving transistor M7, an electrically connected pulse width modulation (Pulse Width Modulation, PWM) module 10 and an amplitude modulation (Pulse Amplitude Modulation, PAM) module 20, and the amplitude modulation module 20 is electrically connected to the light emitting element 12.

[0062] Wherein, the pixel driving circuit 11 generates a driving current with adjustable duration under the control of the amplitude modulation module 20 and the pulse width modulation module 10. Specifically, the second driving transistor M7 is used to output the driving current according to the signal of its gate and the signal of its first end. The amplitude modulation module 20 corresponds to the first light-emitting control signal PAM_EM, that is, the amplitude modulation module 20 receives the first light-emitting control signal PAM_EM; the pulse width modulation module 10 corresponds to the second signal, that is, the pulse width modulation module 10 receives the second signal. Wherein, the second signal is another signal provided to the sub-pixel in addition to the above-mentioned first light-emitting control signal PAM_EM that can affect the light-emitting time of the sub-pixel. Exemplarily, the second signal includes a sweep signal SWEEP and / or a second light-emitting control signal PWM_EM.

[0063] Exemplarily, in the embodiment of the present invention, the pulse width modulation module 10 is configured to output a pulse width setting signal to the first end of the amplitude modulation module 20 based on the second data signal PWM_DATA and the sweep signal SWEEP under the control of the second light emitting control signal PWM_EM, so as to control the duration of providing the driving current to the light emitting element 12. Figure 5 In the embodiment, the first end of the amplitude modulation module 20 is electrically connected to the first node N1.

[0064] The amplitude modulation module 20 is configured to control the light emitting element 12 to emit light in response to the above-mentioned driving current under the control of the first light emitting control signal PAM_EM. When the first light emitting control signal PAM_EM is at an enable level, the driving current flows through the light emitting element 12, and the light emitting element 12 is lit. When the first light emitting control signal PAM_EM is at a non-enable level, the driving current cannot flow through the light emitting element 12, and the light emitting element 12 is in an off state.

[0065] Optional, such as Figure 5 As shown, the pulse width modulation module 10 includes a first driving transistor M1, a first gate reset transistor M2, a first data writing transistor M3, a first compensation transistor M4, a first light emission control transistor M6, a second light emission control transistor M5 and a first capacitor C1.

[0066] The second light-emitting control transistor M5 is connected between the second power signal line PWM_PVDD and the first electrode of the first driving transistor M1, and the first light-emitting control transistor M6 is connected between the second electrode of the first driving transistor M1 and the first node N1. The first data writing transistor M3 is connected between the second data signal line PWM_DATA and the first electrode of the first driving transistor M1, the first compensation transistor M4 is connected to the second electrode and the gate of the first driving transistor M1, and the first gate reset transistor M2 is connected to the gate of the first driving transistor M1 and the pulse width reset signal line PWM_REF. The first plate of the first capacitor C1 is connected to the gate of the first driving transistor M1, and the second plate of the first capacitor C1 receives the sweep signal SWEEP. Among them, the gate of the first gate reset transistor M2 receives the first pulse width scanning signal PWM_S1, and the gates of the first data writing transistor M3 and the first compensation transistor M4 receive the second pulse width scanning signal PWM_S2. The gates of the first light-emitting control transistor M6 and the second light-emitting control transistor M5 receive the second light-emitting control signal PWM_EM.

[0067] The amplitude modulation module 20 includes a second gate reset transistor M8, a second data writing transistor M9, a second compensation transistor M10, a third light emission control transistor M11, a fourth light emission control transistor M12, an electrode reset transistor M13 and a second capacitor C2.

[0068] The third light emission control transistor M11 is connected between the first power signal line PAM_PVDD and the first electrode of the second driving transistor M7, and the fourth light emission control transistor M12 is connected between the second electrode of the second driving transistor M7 and the light emitting element 12. The second driving transistor M7 generates a driving current under the control of its gate voltage, and the gate of the second driving transistor M7 is electrically connected to the above-mentioned first node N1 to receive the pulse width setting signal output by the above-mentioned pulse width modulation module 10. The second data writing transistor M9 is connected between the first data signal line PAM_DATA and the first electrode of the second driving transistor M7. The second compensation transistor M10 is connected to the second electrode and the gate of the second driving transistor M7, the second gate reset transistor M8 is connected to the gate of the second driving transistor M7 and the amplitude reset signal line PAM_REF, the electrode reset transistor M13 is connected to the first electrode of the light emitting element 12, the fourth light emission control transistor M12 is also connected to the first electrode of the light emitting element 12, and the second electrode of the light emitting element 12 is connected to the third power signal line PVEE. The gate of the second gate reset transistor M8 receives the first amplitude scan signal PAM_S1, the gates of the second data write transistor M9, the second compensation transistor M10 and the electrode reset transistor M13 receive the second amplitude scan signal PAM_S2, and the gates of the third emission control transistor M11 and the fourth emission control transistor M12 receive the first emission control signal PAM_EM.

[0069] It should be noted that Figure 5 The connection of the first electrode of the electrode reset transistor M13 to the third power signal line PVEE is only a schematic diagram. In other embodiments, the first electrode of the electrode reset transistor M13 may also receive the amplitude reset signal PAM_REF, that is, the first electrode of the electrode reset transistor M13 and the first electrode of the second gate reset transistor M8 receive the same signal. In other embodiments, the first electrode of the electrode reset transistor M13 is not connected to the third power signal line PVEE, and the first electrode of the electrode reset transistor M13 and the first electrode of the second gate reset transistor M8 receive different signals, which is not illustrated in the figure.

[0070] For example, Figure 6 As shown, within a frame period, the working process of the pixel driving circuit 11 includes a data writing phase P1 and a light emitting phase P2. Optionally, the data writing phase P1 can be divided into a first writing phase t1 and a second writing phase t2. Optionally, a frame period corresponding to a sub-pixel is a data refresh period, that is, a period of the first writing phase t1.

[0071] In the first writing phase t1 , the amplitude modulation module 20 sequentially performs the first gate resetting phase t11 and the first data writing phase t12 .

[0072] In the first gate reset stage t11, the first amplitude scanning signal PAM_S1 is at the enable level, the second gate reset transistor M8 is turned on, and the amplitude reset signal PAM_REF is written into the gate of the second driving transistor M7 through the second gate reset transistor M8 to reset the gate of the second driving transistor M7.

[0073] In the first data writing stage t12, the second amplitude scanning signal PAM_S2 is at the enable level, the second data writing transistor M9 and the second compensation transistor M10 are turned on, and the first data signal PAM_DATA is written into the gate of the second driving transistor M7 through the second data writing transistor M9 and the second compensation transistor M10 and threshold compensation is performed. Optionally, in this stage, the electrode reset transistor M13 is turned on to reset the electrode of the light emitting element 12.

[0074] In the second writing phase t2 , the pulse width modulation module 10 sequentially performs the second gate resetting phase t21 and the second data writing phase t22 .

[0075] In the second gate reset stage t21, the first pulse width scanning signal PWM_S1 is at the enable level, the first gate reset transistor M2 is turned on, and the pulse width reset signal PWM_REF is written into the gate of the first driving transistor M1 through the first gate reset transistor M2 to reset the gate of the first driving transistor M1.

[0076] In the second data writing phase t22, the second pulse width scanning signal PWM_S2 is at the enable level, the first data writing transistor M3 and the first compensation transistor M4 are turned on, and the second data signal PWM_DATA is written into the gate of the first driving transistor M1 through the turned-on first data writing transistor M3 and the first compensation transistor M4 and threshold compensation is performed. Among them, the second data signal PWM_DATA is related to the grayscale of the sub-pixel in the current frame. When displaying different grayscales, the second data signal PWM_DATA applied to the sub-pixel is different. For example, the second data signal PWM_DATA applied at grayscale 0 and grayscale 255 is different.

[0077] Then enter the light-emitting stage P2. In the light-emitting stage P2, the second light-emitting control signal PWM_EM is at the enable level, the first light-emitting control transistor M6 and the second light-emitting control transistor M5 are turned on, and the pulse width modulation module 10 generates a pulse width setting signal based on the second data signal PWM_DATA and the sweep signal SWEEP, which can be transmitted to the first node N1.

[0078] The first light emission control signal PAM_EM is at an enable level, and the third light emission control transistor M11 and the fourth light emission control transistor M12 are turned on.

[0079] It should be noted that the above-mentioned light-emitting stage P2 is not the stage in which the light-emitting element 12 effectively emits light. The light-emitting stage P2 includes an effective light-emitting period and a non-light-emitting period. The light-emitting stage P2 can be understood as a stage in which the first light-emitting control signal PAM_EM is at an enable level.

[0080] In the light emitting stage P2, the first light emitting control signal PAM_EM controls the third light emitting control transistor M11 and the fourth light emitting control transistor M12 to turn on, and the second driving transistor M7 generates a driving current under the control of its gate voltage, and the amplitude modulation module 20 provides a driving current to the light emitting element 12. Driving current Id=K3(V PAM_DATA -V PAM_PVDD ) 2 , V PAM_DATA is the voltage value of the first data signal PAM_DATA, V PAM_PVDD is the voltage value of the first power signal PAM_PVDD, and K3 is a constant related to the characteristics of the second driving transistor M7.

[0081] The period during which the second light-emitting control signal PWM_EM controls the first light-emitting control transistor M6 and the second light-emitting control transistor M5 to be turned on includes a signal change period. During the signal change period, the frequency sweep signal SWEEP is a ramp signal that gradually changes from a high level to a low level. When the frequency sweep signal SWEEP changes, due to the coupling effect of the first capacitor C1, the voltage of the gate of the first driving transistor M1 starts to change from the initial gate voltage, wherein the initial gate voltage is the voltage of the gate of the first driving transistor M1 at the initial moment of the signal change period, and the initial gate voltage is related to the above-mentioned second data signal PWM_DATA. When the gate voltage of the first driving transistor M1 changes to the critical voltage Vg', Vg'=Vs-|Vth|, Vs is the source voltage of the first driving transistor M1, and Vs=V PWM_PVDD , the first driving transistor M1 changes from the off state to the on state, and the second power signal PWM_PVDD as the pulse width setting signal is provided to the first node N1 via the turned-on first driving transistor M1 and the first light-emitting control transistor M6. As a result, the second driving transistor M7 is turned off, thereby stopping the supply of driving current to the light-emitting element 12. According to the difference of the second data signal PWM_DATA, the initial gate voltage of the first driving transistor M1 is different, and accordingly, the time required for the gate voltage of the first driving transistor M1 to change to the critical voltage Vg' is different, that is, the time for the first driving transistor M1 to be in the off state will change accordingly. Figure 6 As an example, when the voltage value of the sweep signal SWEEP changes to V1, the first driving transistor M1 is turned on.

[0082] Figure 6 The time point t3′ is shown in FIG. 1 , which is the time point when the second driving transistor M7 is turned off, that is, at the time point t3′, the voltage value of the sweep signal SWEEP changes to V1. The time period between the turn-on time of the first light-emitting control signal PAM_EM and the time point t3′ is the effective light-emitting period t31 of the light-emitting element 12.

[0083] For example, Figure 6 As shown, in the data writing phase P1, the sweep signal SWEEP is at a low level; in a portion of the light emitting phase P2, for example, Figure 6 As shown, in the initial period of the light-emitting stage P2, the sweep signal SWEEP jumps from a low level to a high level, and then linearly decreases from the high level, and the voltage value changes by △V SWEEP .

[0084] For example, Figure 6As shown, at least in the second data writing phase t22, that is, at least in the period when the second pulse width scanning signal PWM_S2 is the enable signal, the frequency sweep signal SWEEP is at a low level. After the enable signal period of the second pulse width scanning signal PWM_S2 ends, the frequency sweep signal SWEEP jumps from the low level V2 to the high level V3, and the voltage value change is V3-V2=△V SWEEP In the light-emitting stage P2, the frequency sweep signal SWEEP includes a signal change period, during which the frequency sweep signal SWEEP is a ramp signal that gradually changes from a high level V3 to a low level V2. Since the frequency sweep signal SWEEP is connected to the gate of the first driving transistor M1 through the first capacitor C1, the gate potential of the first driving transistor M1 will be raised during the process of the frequency sweep signal SWEEP jumping from a low level to a high level. After the second data signal PWM_DATA is written and the threshold compensation is performed, the gate voltage of the first driving transistor M1 increases by △V SWEEP That is, the initial gate voltage Vg1 = V PWM_DATA -|Vth|+△V SWEEP , V PWM_DATA is the voltage value of the second data signal PWM_DATA, and Vth is the threshold voltage of the first driving transistor M1.

[0085] When the threshold voltage Vg' of the first driving transistor M1 is fixed, the frequency sweep signal SWEEP adopts Figure 6 The illustrated timing can reduce the voltage value of the second data signal PWM_DATA required when the gate voltage of the first driving transistor M1 reaches the target gate voltage. When the voltage value of the second data signal PWM_DATA is fixed, the gate voltage of the first driving transistor M1 will be raised due to the signal jump of the sweep signal SWEEP after the data is written. When the change rate of the sweep signal SWEEP is fixed, it will take a longer time for the gate potential of the first driving transistor M1 to drop from the initial gate voltage to the critical voltage Vg'. That is, the time that the first driving transistor M1 is in the off state in the light-emitting stage P2 will be longer, and the corresponding amplitude modulation module 20 will provide the driving current to the light-emitting element 12 for a longer time. Therefore, the sweep signal SWEEP adopts Figure 6 The waveform design shown can increase the degree of freedom in controlling the flow period of the driving current.

[0086] Optional, such as Figure 7 As shown, Figure 7 for Figure 5 Another working timing diagram of the pixel driving circuit shown in FIG. 1 shows that in the data writing phase P1, the frequency sweep signal SWEEP is at a high level; in a part of the light emitting phase P2, the frequency sweep signal SWEEP starts to decrease linearly from a high level, and the voltage value changes by △V SWEEPIn this case, the initial gate voltage Vg1 = V PWM_DATA -|Vth|.

[0087] Optionally, the embodiment of the present invention also provides another timing diagram that can be used to drive Figure 5 The pixel driving circuit provided in the embodiment is as follows: Figure 8 As shown, Figure 8 for Figure 5 Another working timing diagram of the pixel driving circuit shown in the figure, the working process of the pixel driving circuit 11 includes a writing stage P1 and a light-emitting stage P2, the writing stage P1 can be divided into a first writing stage t1 and a second writing stage t2, the first writing stage t1 includes a first gate reset stage t11 and a first data writing stage t12, and the second writing stage t2 includes a second gate reset stage t21 and a second data writing stage t22. Among them, the first gate reset stage t11 and the second gate reset stage t21 at least partially overlap, and the first data writing stage t12 and the second data writing stage t22 at least partially overlap.

[0088] In the embodiment of the present invention, Figure 6 As shown, there is a time difference dt1 between the start time of the first light emitting control signal PAM_EM and the start time of the sweep signal SWEEP, wherein the start time of the sweep signal SWEEP refers to the time when the sweep signal SWEEP starts to decrease.

[0089] Optionally, the time difference dt1 between the start time of the first light emitting control signal PAM_EM and the start time of the sweep signal SWEEP of at least two different sub-pixels is different.

[0090] Combination Figure 6 As shown, assuming that when the sweep signal SWEEP drops to V1, V2≤V1≤V3, the first driving transistor M1 in the pulse width modulation module 10 is turned on, and the second power signal PWM_PVDD as the pulse width setting signal is transmitted to the first node N1, controlling the second driving transistor M7 to be turned off, and the light-emitting element 12 begins to not emit light. Also, assuming that the initial potential of the sweep signal SWEEP in the signal change period is V3, the duration of the signal change period is b, and the potential of the sweep signal SWEEP at the end of the signal change period is V2. Figure 6As shown, after the sweep signal SWEEP enters the signal change period, after a time dt1, that is, when the first light-emitting control signal PAM_EM is turned on, the potential of the sweep signal SWEEP changes from V3 to V3-dt1×k, where k is the slope of the sweep signal SWEEP in the signal change period, and k=(V3-V2) / b. After a time t31 continues to pass, the potential of the sweep signal SWEEP changes from V3-dt1×k to V3-dt1×k–t31×k=V1, and the light-emitting element 12 begins to not emit light. It can be deduced that: t31=(V3-V1) / k-dt1. Therefore, the embodiment of the present invention can differentially set the effective light-emitting time t31 of the two sub-pixels by differentially setting the time difference dt1 between the turn-on time of the sweep signal SWEEP provided to different sub-pixels and the turn-on time of the first light-emitting control signal, so that the brightness of the two sub-pixels can be adjusted by adjusting the effective light-emitting time of the two sub-pixels, thereby improving the brightness uniformity of the display panel.

[0091] Optionally, in an embodiment of the present invention, the target gray scale may be determined by the second data signal PWM_DATA and the sweep signal SWEEP.

[0092] Exemplarily, in an embodiment of the present invention, the second data signal PWM_DATA of the at least two different sub-pixels with different effective light-emitting times t31 is the same, and / or the sweep signal SWEEP of the at least two different sub-pixels with different effective light-emitting times t31 is the same. The sweep signal SWEEP of at least two different sub-pixels is the same, including the waveform of the sweep signal SWEEP of at least two different sub-pixels is the same, in other words, the start time of the sweep signal SWEEP of at least two different sub-pixels, that is, the start time of the signal change period is the same, and the time length and slope of the sweep signal SWEEP of at least two different sub-pixels in the signal change period are respectively the same.

[0093] For example, Fig. 9 As shown, Fig. 9 Another working timing diagram of two different sub-pixels in a display panel provided by an embodiment of the present invention, the two sub-pixels are respectively a first sub-pixel and a second sub-pixel, and both can adopt Figure 5 The circuit structure shown in Fig. 9 In the figure, SWEEP1 is a sweep signal provided to the first sub-pixel, PAM_EM1 is a first light-emitting control signal provided to the first sub-pixel, and PWM_EM1 is a second light-emitting control signal provided to the first sub-pixel; SWEEP2 is a sweep signal provided to the second sub-pixel, PAM_EM2 is a first light-emitting control signal provided to the second sub-pixel, and PWM_EM2 is a second light-emitting control signal provided to the second sub-pixel. Fig. 9 As shown, the time difference between the start time of the first light emitting control signal PAM_EM of the first sub-pixel and the start time of the sweep signal SWEEP is dt11, and the time difference between the start time of the first light emitting control signal PAM_EM of the second sub-pixel and the start time of the sweep signal SWEEP is dt12, dt11≠dt12, Fig. 9 Take dt11>dt12 as an example.

[0094] Or, the time difference between the start-up time of the first light-emitting control signal PAM_EM and the start-up time of the sweep signal SWEEP in at least two different states of the same sub-pixel is different, so that the effective light-emitting time of the sub-pixel in at least two different states is different, thereby adjusting the actual brightness of the sub-pixel in at least two different states to make the two tend to be consistent, avoiding the flicker problem caused by the brightness difference.

[0095] Optionally, in some embodiments, the start-up time of the sweep signal SWEEP in each frame period is the same as the start-up time of the frame period in which it is located, and the time difference between the start-up time of the first light-emitting control signal PAM_EM of the first sub-pixel and the start-up time of the frame period in which it is located is greater than the time difference between the start-up time of the first light-emitting control signal PAM_EM of the second sub-pixel and the start-up time of the frame period in which it is located.

[0096] Optionally, in this embodiment, the ramp signal time length of the sweep signal SWEEP in each frame period is the same and the slope is the same. However, in some other optional embodiments of the present application, the sweep signal SWEEP can be combined with the change of the first light-emitting control signal PAM_EM to improve the display effect together, in combination with the design of different ramp signal time lengths and different slopes of the sweep signal SWEEP described below.

[0097] For example, Figure 6 As shown, in the embodiment of the present invention, there is a time difference dt2 between the start time of the first light emitting control signal PAM_EM and the start time of the second light emitting control signal PWM_EM.

[0098] Optionally, the time difference dt2 between the start time of the first light emitting control signal PAM_EM and the start time of the second light emitting control signal PWM_EM of at least two different sub-pixels is different. According to the above description of the working process of the pixel driving circuit, it can be seen that in the embodiment of the present invention, the second light emitting control signal PWM_EM applied to the pulse width modulation module 10 can affect the time when the pulse width setting signal output by the pulse width modulation module 10 is provided to the amplitude modulation module 20. The embodiment of the present invention can set the effective light emitting time of the two sub-pixels differently by differentially setting the time difference dt2 between the start time of the first light emitting control signal PAM_EM and the start time of the second light emitting control signal PWM_EM of at least two different sub-pixels, so that the brightness of the two sub-pixels can be adjusted by adjusting the effective light emitting time of the two sub-pixels, thereby improving the brightness uniformity of the display panel.

[0099] For example, Fig. 9 As shown, the time difference between the turn-on time of the first light emitting control signal PAM_EM of the first sub-pixel and the turn-on time of the second light emitting control signal PWM_EM is dt21, and the time difference between the turn-on time of the first light emitting control signal PAM_EM of the second sub-pixel and the turn-on time of the second light emitting control signal PWM_EM is dt22, dt21≠dt22, Fig. 9 Take dt21>dt22 as an example.

[0100] Optional, such as Fig. 9 As shown, the pulse width of the enable level of the first light emitting control signal PAM_EM of the first sub-pixel is a1, the pulse width of the enable level of the first light emitting control signal PAM_EM of the second sub-pixel is a2, the pulse width of the enable level of the second light emitting control signal PWM_EM of the first sub-pixel is c1, the pulse width of the enable level of the second light emitting control signal PWM_EM of the second sub-pixel is c2, the time difference between the closing time of the first light emitting control signal PAM_EM of the first sub-pixel and the closing time of the second light emitting control signal PWM_EM is dt31, and the time difference between the closing time of the first light emitting control signal PAM_EM of the second sub-pixel and the closing time of the second light emitting control signal PWM_EM is dt32, wherein the closing time refers to the time when the corresponding signal switches from the enable level to the non-enable level. In the embodiment of the present invention, c1=c2, and dt31=dt32 can be set. Based on this setting, when dt21≠dt22, a1≠a2 can be set, that is, the light emitting time of the first sub-pixel and the second sub-pixel are set differently.

[0101] Alternatively, the embodiment of the present invention can also make the time difference between the start-up time of the first light-emitting control signal PAM_EM and the start-up time of the second light-emitting control signal PWM_EM of the same sub-pixel in at least two different states different, so that the effective light-emitting time of the sub-pixel in at least two different states is different, and the brightness of the sub-pixel in at least two different states is adjusted to make the two tend to be consistent, thereby avoiding the flicker problem caused by the brightness difference.

[0102] In an embodiment of the present invention, the time difference between the start time of the first light emitting control signal PAM_EM and the start time of the second signal of at least two different sub-pixels is different, so as to set the light emitting time of the two sub-pixels differently, so as to adjust the brightness of the two sub-pixels by adjusting the light emitting time of the two sub-pixels, thereby improving the brightness uniformity of the display panel. Or, the time difference between the start time of the first light emitting control signal PAM_EM and the start time of the second signal of the same sub-pixel in at least two different states is different so as to make the light emitting time of the sub-pixel in at least two different states different, so as to adjust the brightness of the sub-pixel in at least two different states, so as to make the two tend to be consistent, and avoid the flicker problem caused by the brightness difference. Among them, the second signal 2 includes the above-mentioned sweep signal SWEEP and / or the second light emitting control signal PWM_EM.

[0103] Exemplarily, in the embodiment of the present invention, the start time of the sweep signal SWEEP is no later than the start time of the first light emitting control signal PAM_EM. Figure 6 and Fig. 9The start time of the sweep signal SWEEP is earlier than the start time of the first light emitting control signal PAM_EM as an example. Alternatively, the start time of the sweep signal SWEEP can be performed simultaneously with the start time of the first light emitting control signal PAM_EM. Based on this setting, it can be ensured that when the first light emitting control signal PAM_EM is at an enable level to control the third light emitting control transistor M11 and the fourth light emitting control transistor M12 to be turned on, the sweep signal SWEEP is already turned on, that is, the sweep signal SWEEP has entered the signal change period, so that it can be ensured that when the first light emitting control signal PAM_EM is at an enable level to control the third light emitting control transistor M11 and the fourth light emitting control transistor M12 to be turned on, the driving current generated by the second driving transistor M7 can be determined whether to flow through the light emitting element 12 only according to the conduction state of the second driving transistor M7. The conduction state of the second driving transistor M7 is affected by the pulse width setting signal output by the pulse width modulation module 10. Whether the pulse width setting signal is output or not is affected by the second light emitting control signal PWM_EM and the sweep signal SWEEP. For example, when the second light emitting control signal PWM_EM is at an enable level to control the first light emitting control transistor M6 and the second light emitting control transistor M5 to be turned on, the pulse width modulation module 10 outputs a pulse width setting signal to the amplitude modulation module 20 .

[0104] For example, Fig.10 As shown, Fig.10 A schematic diagram of a display panel provided in an embodiment of the present invention includes a display area, the display area includes multiple sub-display areas, and the sub-display areas include the above sub-pixels. In the embodiment of the present invention, the sub-pixels of at least two different sub-display areas respectively include the above first time and second time.

[0105] Taking the multiple sub-display areas A including at least the first sub-display area A1 and the second sub-display area A2 as an example, in the embodiment of the present invention, the first sub-display area A1 includes the first time, and the second sub-display area A2 includes the second time. That is, the sub-pixels in the first sub-display area A1 include the first time, and the sub-pixels in the second sub-display area A2 include the second time. In other words, the light-emitting time of the sub-pixels in the first sub-display area A1 is different from the light-emitting time of the sub-pixels in the second sub-display area A2; or, in the case where the sub-pixels have the following characteristics: Figure 5 In the circuit structure shown, the turn-on time of the first light emitting control signal PAM_EM of the sub-pixels in the first sub-display area A1 is different from the turn-on time of the first light emitting control signal PAM_EM of the sub-pixels in the second sub-display area A2.

[0106] In the embodiment of the present invention, the sub-display area A can be divided according to the light-emitting time of different areas in the display panel. Multiple sub-pixels in the same sub-display area A can emit light at the same time, and sub-pixels in different sub-display areas A can emit light at different times. Fig.10 As shown, the display panel includes a first sub-display area A1, a second sub-display area A2, a third sub-display area A3 and a fourth sub-display area A4, and the sub-pixels in the first sub-display area A1, the second sub-display area A2, the third sub-display area A3 and the fourth sub-display area A4 emit light at different times.

[0107] Exemplarily, in an embodiment of the present invention, Fig.10 As shown, the display panel includes a plurality of display units 30 repeatedly arranged along a first direction h1, and the display unit 30 includes the plurality of sub-display areas A that emit light at different times. Fig.10 As shown, the plurality of display units 30 at least include a first display unit 301 and a second display unit 302. The first display unit 301 includes a first sub-display area A1, a second sub-display area A2, a third sub-display area A3 and a fourth sub-display area A4, and the second display unit 302 includes a first sub-display area A1, a second sub-display area A2, a third sub-display area A3 and a fourth sub-display area A4. The plurality of first sub-display areas A1 can emit light simultaneously, the plurality of second sub-display areas A2 can emit light simultaneously, the plurality of third sub-display areas A3 can emit light simultaneously, and the plurality of fourth sub-display areas A3 can emit light simultaneously.

[0108] The embodiment of the present invention can avoid the problem of excessive voltage drop caused by excessive load on the first power signal line due to all sub-pixels in the display panel being simultaneously lit up by dividing the display area of ​​the display panel into multiple sub-display areas and making different sub-display areas light up at the same time. The first power signal line is used to transmit the first power signal PAM_PVDD. Based on this setting, the load on the first power signal line can be reduced, thereby reducing the voltage drop of the first power signal PAM_PVDD during the transmission process, which is conducive to improving the display uniformity of the display panel.

[0109] Moreover, the embodiment of the present invention makes the sub-pixels of at least two different sub-display areas A include the above-mentioned first time and second time respectively. When driving the display panel, the brightness of the sub-pixels of at least two different sub-display areas A can be made consistent, which is beneficial to improving the brightness consistency of different areas of the display panel.

[0110] Exemplarily, in an embodiment of the present invention, the display area includes a plurality of first sub-display areas and a plurality of second sub-display areas, and at least one second sub-display area is included between two adjacent first sub-display areas. Fig.10As shown, two adjacent first sub-display areas A1 may be separated by the second sub-display area A2, the third sub-display area A3 and the fourth sub-display area A4, and two adjacent second sub-display areas A21 may be separated by the third sub-display area A3, the fourth sub-display area A4 and the first sub-display area A1, that is, the sub-display areas A that emit light at the same time are separated by different sub-display areas A that emit light at other times. Based on this arrangement, the sub-display areas A that are emitting light are not concentrated in one area, but are distributed in at least two display parts 30, which is conducive to further improving the uniformity of the display screen.

[0111] Optionally, in the embodiment of the present invention, each sub-display area A may include a single pixel row, or include a plurality of pixel rows 3 adjacently arranged in the first direction h1.

[0112] like Fig.11 As shown, Fig.11 A schematic diagram of a display unit provided in an embodiment of the present invention, the display unit 30 includes a first sub-display area A1, a second sub-display area A2, a third sub-display area A3 and a fourth sub-display area A4, each of which includes a pixel row 3.

[0113] Or, if Fig.12 As shown, Fig.12 A schematic diagram of another display panel provided by an embodiment of the present invention, in which the first sub-display area A1 may include m pixel rows, for example, in a top-down order along the display panel, the first sub-display area A1 includes the first pixel row to the m-th pixel row, the second sub-display area A2 includes the m+1-th pixel row to the n-th pixel row, and the third sub-display area A3 includes the n+1-th pixel row to the p-th pixel row. Wherein, m is an integer greater than or equal to 1, n is an integer greater than or equal to m, and p is an integer greater than or equal to n.

[0114] When driving the display panel, exemplarily, in combination with Figure 5 and Fig.13 As shown, Fig.13 An operating timing diagram of a display panel provided in an embodiment of the present invention can enable different pixel rows 3 to receive the same first amplitude scanning signal PAM_S1, and enable different pixel rows 3 to receive the same second amplitude scanning signal PAM_S2, so as to simplify the driving timing of the display panel and reduce the number of the first amplitude scanning signal PAM_S1 and the second amplitude scanning signal PAM_S2 required for the display panel to operate.

[0115] Optionally, the embodiment of the present invention can make multiple pixel rows 3 in the same sub-display area A receive the same sweep signal SWEEP, the same second light-emitting control signal PWM_EM, and the same first light-emitting control signal PAM_EM, so as to make multiple pixel rows 3 in the same sub-display area A emit light simultaneously. Compared with the method of making different pixel rows 3 receive different above-mentioned signals, the driving timing of the display panel can be simplified, and the number of the sweep signal SWEEP, the second light-emitting control signal PWM_EM and the first light-emitting control signal PAM_EM required for the operation of the display panel can be reduced.

[0116] like Fig.13 As shown, when the display panel is displaying, the driving process of the display panel includes a first data writing stage D1 and a first light-emitting stage E1 corresponding to the first sub-display area A1, a second data writing stage D2 and a second light-emitting stage E2 corresponding to the second sub-display area A2, and a third data writing stage D3 and a third light-emitting stage E3 corresponding to the third sub-display area A3.

[0117] The first data writing phase D1, the second data writing phase D2, and the third data writing phase D3 all include a first data signal writing phase DA and a second data signal writing phase DW. Fig.13 The first data signal writing phase in the first data writing phase D1 is marked as DA1, the first data signal writing phase in the second data writing phase D2 is marked as DA2, and the first data signal writing phase in the third data writing phase D3 is marked as DA3; and, the second data signal writing phase in the first data writing phase D1 is marked as DW1, the second data signal writing phase in the second data writing phase D2 is marked as DW2, and the second data signal writing phase in the third data writing phase D3 is marked as DW3.

[0118] In the first data signal writing phase DA1, the first amplitude scanning signal PAM_S1 and the second amplitude scanning signal PAM_S2 are successively at the enable level. When the second amplitude scanning signal PAM_S2 is at the enable level, the second data writing transistor M9 and the second compensation transistor M10 are turned on, and the first data signal PAM_DATA is written into the gate of the second driving transistor M7 through the second data writing transistor M9 and the second compensation transistor M10 and threshold compensation is performed.

[0119] In the second data signal writing phase DW1, the first pulse width scanning signal PWM_S1 and the second pulse width scanning signal PWM_S2 in the m sub-pixel rows in the first sub-display area A1 are enabled row by row. Then, the first light-emitting phase E1 is entered. In the first light-emitting phase E1, the second light-emitting control signal PWM_EM[A1] and the first light-emitting control signal PAM_EM[A1] in the first sub-display area A1 are enabled, and the m sub-pixel rows in the first sub-display area A1 emit light. The duration of the driving current flowing through the sub-pixel is related to the written second data signal PWM_DATA and the sweep signal SWEEP.

[0120] Then, the second data writing stage D2, the second light emitting stage D3, the third data writing stage D3 and the third light emitting stage are sequentially performed, and each stage is similar to the driving process of the corresponding stage of the first sub-display area A1.

[0121] In the embodiment of the present invention, Fig.13 As shown, the first sub-display area A1 includes the first time a1, the second sub-display area A2 includes the second time a2, and the first time a1 is different from the second time a2. Based on this setting, the different first time and second time can be used to compensate for the brightness variation problem caused by factors such as different light-emitting moments of the first sub-display area A1 and the second sub-display area A2, as well as the fluctuation of the driving signal and the drift of the threshold voltage characteristics of the driving transistor, so as to improve the brightness consistency of the first sub-display area A1 and the second sub-display area A2.

[0122] Fig.13 The first time a1 is taken as the light-emitting time of the sub-pixel in the first sub-display area A1, and the second time a2 is taken as the light-emitting time of the sub-pixel in the second sub-display area A2, that is, the first time a1 is taken as the pulse width of the enable level of the first light-emitting control signal PAM_EM as an illustration, and the second time a2 is taken as the pulse width of the enable level of the first light-emitting control signal PAM_EM as an illustration. Of course, the first time can also be taken as the turn-on time of the first light-emitting control signal PAM_EM of the sub-pixel in the first sub-display area A1, and the second time can be taken as the turn-on time of the first light-emitting control signal PAM_EM of the sub-pixel in the second sub-display area A2.

[0123] like Fig.13 As shown, the third sub-display area A3 includes the third time a3, Fig.13 The third time a3 is the light-emitting time of the sub-pixels in the third sub-display area A3, that is, the third time a3 is the pulse width of the enable level of the first light-emitting control signal PAM_EM as an illustration, and the third time a3 is different from the first time a1 and the second time a2.

[0124] exist Fig.13In the figure, "i" in the first pulse width scanning signal PWM_S1[i] and the second pulse width scanning signal PWM_S2[i] is the serial number of the pixel row where the pixel driving circuit is located, wherein the first pulse width scanning signal PWM_S1[i] of the pixel driving circuit in the i-th row can be the same as the second pulse width scanning signal PWM_S2[i_1] of the pixel driving circuit in the i_1-th row.

[0125] In the sweep signal SWEEP[j], the second light-emitting control signal PWM_EM[j] and the first light-emitting control signal PAM_EM[j], j is the serial number of the sub-display area where the pixel driving circuit is located. Taking the pixel driving circuit located in the sub-display area A1 as an example, the above signal terminals of the pixel driving circuit are the sweep signal SWEEP[A1], the second light-emitting control signal PWM_EM[A1] and the first light-emitting control signal PAM_EM[A1], respectively. That is, multiple pixel driving circuits in one sub-display area share one sweep signal SWEEP, one second light-emitting control signal PWM_EM, and one first light-emitting control signal PAM_EM, so that multiple sub-pixels in the same sub-display area emit light simultaneously.

[0126] Exemplarily, the sub-pixel also receives a second signal; in the embodiment of the present invention, in at least one sub-display area, the time difference between the start time of the first light emission control signal PAM_EM and the start time of the second signal of at least two different sub-pixels is the same. When the second signal includes the sweep signal SWEEP and / or the second light emission control signal PWM_EM, such as Fig.13 As shown, in the first sub-display area A1, the start-up time of the first light-emitting control signal PAM_EM of each sub-pixel is the same, and the start-up time of the second signal of each sub-pixel is also the same, so the time difference between the two is also the same. In the second sub-display area A2, the start-up time of the first light-emitting control signal PAM_EM of each sub-pixel is the same, and the start-up time of the second signal of each sub-pixel is also the same, so the time difference between the two is also the same. In the third sub-display area A3, the start-up time of the first light-emitting control signal PAM_EM of each sub-pixel is the same, and the start-up time of the second signal of each sub-pixel is also the same, so the time difference between the two is also the same. Based on this setting, while ensuring the display uniformity of different sub-display areas, multiple sub-pixels in the same sub-display area can receive the same first light-emitting control signal PAM_EM and the same second signal, which is conducive to simplifying the driving timing of the display panel.

[0127] In the embodiment of the present invention, Fig.13As shown, the first sub display area A1 and the second sub display area A2 receive different sweep signals SWEEP. Under the action of different sweep signals SWEEP, the sub pixels in the first sub display area A1 and the second sub display area A2 can have different light emission times, which is beneficial to improve the brightness consistency of the sub pixels in the first sub display area A1 and the second sub display area A2.

[0128] Exemplarily, multiple sub-pixels in the same sub-display area share a sweep signal SWEEP to achieve brightness uniformity in different sub-display areas while reducing the number of sweep signals SWEEP required for the display panel to operate, thereby reducing the driving complexity of the display panel.

[0129] For example, Figure 6 As shown, the sweep frequency signal SWEEP includes a signal change period ΔT, and the sweep frequency signal SWEEP has a change rate within the signal change period ΔT.

[0130] In the embodiment of the present invention, the sweep signal SWEEP includes a first sweep signal SWEEP[A1] and a second sweep signal SWEEP[A2]. The first sub display area A1 receives the first sweep signal SWEEP[A1], and the second sub display area A2 receives the second sweep signal SWEEP[A2]. Fig.14 As shown, Fig.14 Another working timing diagram of a display panel provided by an embodiment of the present invention, wherein the change rate of the first sweep signal SWEEP[A1] in the signal change period is different from the change rate of the second sweep signal SWEEP[A2] in the signal change period.

[0131] In combination with the above t31=(V3-V1) / k-dt1, it can be seen that the embodiment of the present invention can differentiate the effective light-emitting time t31 of the sub-pixels in different sub-display areas by differentially setting the slope k of the sweep signal SWEEP provided to different sub-display areas, thereby being able to adjust the brightness of the sub-pixels in different sub-display areas by adjusting the effective light-emitting time in different sub-display areas.

[0132] like Fig.14 As shown, the third sub-display area A3 receives the third sweep signal SWEEP[A3], and the change rate of the third sweep signal SWEEP[A3] in the signal change period is different from the change rates of the first sweep signal SWEEP[A1] and the second sweep signal SWEEP[A2] in the signal change period. Fig.14As an example, the change rate of the first sweep signal SWEEP[A1] during the signal change period is greater than the change rate of the second sweep signal SWEEP[A2] during the signal change period, and the change rate of the second sweep signal SWEEP[A2] during the signal change period is greater than the change rate of the third sweep signal SWEEP[A3] during the signal change period.

[0133] For example, Figure 6 As shown, the sweep signal SWEEP has a difference △V between the maximum value and the minimum value during the signal change period. SWEEP △V SWEEP =V3-V2. In the embodiment of the present invention, Fig.14 As shown, the difference between the first sweep signal SWEEP[A1] and the second sweep signal SWEEP[A2] is different. Fig.14 As shown, the first sweep signal SWEEP[A1] has a first difference △V during the signal change period. SWEEP1 , the second sweep signal SWEEP[A2] has a second difference △V during the signal change period SWEEP2 The first difference △V SWEEP1 and the second difference △V SWEEP2 different.

[0134] Combined with the above t31 = (V3-V1) / k-dt1, k = (V3-V2) / b = △V SWEEP / b It can be seen that the embodiment of the present invention provides the difference △V of the sweep signal SWEEP provided to different sub-display areas by differentially setting SWEEP , the effective light-emitting time t31 of the sub-pixels in different sub-display areas can be set differently, so that the brightness of the sub-pixels in different sub-display areas can be adjusted by adjusting the effective light-emitting time in different sub-display areas.

[0135] like Fig.14 As shown, the third sub-display area A3 receives the third sweep signal SWEEP[A3], and the third sweep signal SWEEP[A3] has a third difference △V in the signal change period. SWEEP3 The third difference △V SWEEP3 and the first difference △V SWEEP1 and the second difference △V SWEEP2 Are different. Fig.14 Take the first difference △V SWEEP1 Greater than the second difference △V SWEEP2 , the second difference △V SWEEP2 Greater than the third difference △V SWEEP3 As a hint.

[0136] Exemplarily, in an embodiment of the present invention, Fig.15 As shown, Fig.15Another working timing diagram of a display panel provided by an embodiment of the present invention, wherein the duration of the first sweep signal SWEEP[A1] in the signal change period is different from the duration of the second sweep signal SWEEP[A2] in the signal change period. Fig.15 As shown, the duration of the first sweep signal SWEEP[A1] during the signal change period is a first duration b1, and the duration of the second sweep signal SWEEP[A2] during the signal change period is a second duration b2, and the first duration b1 and the second duration b2 are different.

[0137] In combination with the above t31=(V3-V1) / k-dt1, k=(V3-V2) / b, it can be seen that the embodiment of the present invention can differentiate the effective light-emitting time t31 of the sub-pixels in different sub-display areas by differentially setting the duration b of the sweep signal SWEEP provided to different sub-display areas during the signal change period, thereby being able to adjust the brightness of the sub-pixels in different sub-display areas by adjusting the effective light-emitting time in different sub-display areas.

[0138] like Fig.15 As shown, the third sub-display area A3 receives the third sweep signal SWEEP[A3], and the duration of the third sweep signal SWEEP[A3] in the signal change period is a third duration b3. The third duration b3 is different from both the first duration b1 and the second duration b2. Fig.15 For example, the first duration b1 is greater than the second duration b2, and the second duration b2 is greater than the third duration b3.

[0139] Exemplarily, in the embodiment of the present invention, the time difference between the start time of the sweep signal SWEEP and the start time of the first light-emitting control signal PAM_EM of any two adjacent sub-display areas is different. Based on this setting, different sub-display areas A can adjust the time difference between the start time of the sweep signal SWEEP and the start time of the first light-emitting control signal PAM_EM received by them according to their respective light-emitting moments, so that the light-emitting time of any two adjacent sub-display areas matches their light-emitting moments, so that the actual brightness of each sub-display area A can be adjusted more finely, which is conducive to further improving the display consistency of the display panel.

[0140] Optionally, the embodiment of the present invention can make the time difference between the start time of the sweep signal SWEEP and the start time of the first light control signal PAM_EM of any two sub-display areas A different, so as to adjust the display uniformity of different sub-display areas A.

[0141] Exemplarily, according to the scanning sequence of the sub-display areas, the time difference between the start time of the sweep signal SWEEP and the start time of the first light-emitting control signal PAM_EM in different sub-display areas gradually increases, or gradually decreases. The scanning sequence is the time sequence for executing the above-mentioned data writing stage. Fig.13 In the embodiment of the present invention, the plurality of sub-display areas are scanned in the order of the first sub-display area A1, the second sub-display area A2 and the third sub-display area A3, so the time difference between the start time of the sweep signal SWEEP received by the first sub-display area A1, the second sub-display area A2 and the third sub-display area A3 and the start time of the first light emitting control signal PAM_EM can be gradually increased or gradually decreased. Based on this setting, the influence of the actual brightness of each sub-display area A due to the different scanning orders can be compensated, and the display uniformity of the display panel can be further improved.

[0142] Optionally, the time difference between the start time of the second light emitting control signal PWM_EM and the start time of the first light emitting control signal PAM_EM of any two adjacent sub-display areas is different. Based on this setting, any two adjacent sub-display areas can adjust the time difference between the start time of the second light emitting control signal PWM_EM and the start time of the first light emitting control signal PAM_EM received by them according to their respective light emitting moments, so that the light emitting time of any two adjacent sub-display areas can be matched with their respective light emitting moments, so that the actual brightness of each sub-display area A can be adjusted more finely, which is conducive to further improving the display consistency of the display panel.

[0143] Exemplarily, the embodiment of the present invention can make the time difference between the start time of the second light emitting control signal PWM_EM and the start time of the first light emitting control signal PAM_EM of any two sub-display areas different, so as to adjust the display uniformity of different sub-display areas A in a targeted manner.

[0144] Optionally, according to the scanning sequence of the sub-display areas, the time difference dt2 between the start time of the second light emitting control signal PWM_EM and the start time of the first light emitting control signal PAM_EM of different sub-display areas gradually increases, or gradually decreases. Fig.10In the embodiment of the present invention, the plurality of sub-display areas are scanned in the order of the first sub-display area A1, the second sub-display area A2 and the third sub-display area A3, so the embodiment of the present invention can make the time difference between the start time of the second light emitting control signal PWM_EM received by the first sub-display area A1, the second sub-display area A2 and the third sub-display area A3 and the start time of the first light emitting control signal PAM_EM gradually increase, or gradually decrease. Based on this setting, the influence of the actual brightness of each sub-display area due to the different scanning orders can be compensated, and the display uniformity of the display panel can be further improved.

[0145] Exemplarily, when driving a display panel, an embodiment of the present invention may first compare the brightness of at least two different sub-pixels. The brightness is the actual brightness of the sub-pixel. The actual brightness can be detected by a brightness detection instrument. When the brightness of one sub-pixel is less than the brightness of another sub-pixel, an embodiment of the present invention may make the first time of one sub-pixel greater than the second time of the other sub-pixel, so as to increase the luminous time of one sub-pixel and reduce the luminous time of the other sub-pixel, so as to reduce the difference in the actual brightness of the two after adjustment, for example, to make the actual brightness of the two sub-pixels equal after adjustment, thereby improving the display uniformity of the display panel.

[0146] Exemplarily, the display panel includes Fig.10 Taking the first sub-display area A1 and the second sub-display area A2 as examples, when driving the display panel, the embodiment of the present invention can first compare the initial brightness of the sub-pixels in the first sub-display area A1 and the second sub-display area A2. When the initial brightness of the sub-pixels in the first sub-display area A1 is less than the initial brightness of the sub-pixels in the second sub-display area A2, the embodiment of the present invention can adjust the first time corresponding to the first sub-display area A1 to be greater than the second time corresponding to the second sub-display area A2, so that the actual brightness difference between the sub-pixels in the first sub-display area A1 and the second sub-display area A2 after adjustment is reduced.

[0147] Exemplarily, in an embodiment of the present invention, the target brightness of at least two different sub-pixels is the same. The target brightness is the ideal brightness that the sub-pixels in the two regions are expected to achieve. When the target brightness of the sub-pixels in two different regions is the same, the above method can compensate for the influence of factors such as different light-emitting moments or threshold voltage drift on the actual brightness of the sub-pixels in the two different regions, reduce the difference in the actual brightness of the sub-pixels in the two different regions, thereby improving the display effect and avoiding the problem of uneven display.

[0148] Optionally, an embodiment of the present invention can also compare the brightness of the same sub-pixel in different states; when the brightness of the sub-pixel in one state is less than the brightness in another state, the first time of the sub-pixel in one state is made greater than the second time of the sub-pixel in another state, so as to reduce the difference in actual brightness of the sub-pixel in two different states.

[0149] Exemplarily, in an embodiment of the present invention, the target brightness of the same sub-pixel in different states is the same. The target brightness is the ideal brightness that the sub-pixel in the two states can achieve. When the target brightness of the sub-pixel in two different states is the same, the above method can compensate for the influence of factors such as different light-emitting moments or threshold voltage drift on the actual light-emitting brightness, reduce the difference in actual brightness of the sub-pixel in the two different states, thereby improving the display effect and avoiding the problem of uneven display.

[0150] Based on the same inventive concept, an embodiment of the present invention further provides a display device, such as Fig.16 As shown, Fig.16 Schematic diagram of a display device provided in an embodiment of the present invention, the display device includes the above-mentioned display panel 100. The specific structure of the display panel 100 has been described in detail in the above-mentioned embodiment, and will not be repeated here. Fig.16 The display device shown is for illustration only, and the display device may be any electronic device with a display function, such as a mobile phone, a car display screen, a tablet computer, a laptop computer, an e-reader or a television.

[0151] Based on the same inventive concept, an embodiment of the present invention further provides a method for driving a display panel, the method for driving the display panel being applied to the above-mentioned display panel, and the method for driving the display panel comprising:

[0152] The control display panel includes at least a first time and a second time, and the first time is different from the second time; wherein,

[0153] The first time and the second time are respectively light-emitting times of different sub-pixels;

[0154] Or, the first time and the second time are respectively the turn-on time of the first light emitting control signal of different sub-pixels;

[0155] Or, the first time and the second time are light-emitting times of the same sub-pixel in different states respectively;

[0156] Alternatively, the first time and the second time are respectively the turn-on time of the first light emitting control signal of the same sub-pixel in different states.

[0157] When the first time and the second time are respectively the light-emitting times of different sub-pixels in the display panel, or are respectively the turn-on times of the first light-emitting control signals of different sub-pixels in the display panel, the embodiment of the present invention can compensate for the brightness differences caused by factors such as different light-emitting moments or different threshold voltage offsets of different sub-pixels by making the first time different from the second time, which is beneficial to improving the display consistency of different areas of the display panel.

[0158] When the first time and the second time are the light-emitting times of the same sub-pixel in different states, or the first time and the second time are the turn-on times of the first light-emitting control signal of the same sub-pixel in different states, the embodiment of the present invention can avoid the flickering problem caused by different brightness of the display panel at different times by making the first time different from the second time.

[0159] Optionally, the driving method of the above-mentioned display panel also includes: comparing the brightness of at least two different sub-pixels; when the brightness of one sub-pixel is smaller than the brightness of another sub-pixel, making the first time of one sub-pixel greater than the second time of the other sub-pixel, so as to increase the light-emitting time of one sub-pixel and reduce the light-emitting time of the other sub-pixel, so as to reduce the difference in actual brightness between the two after adjustment, for example, making the actual brightness of the two sub-pixels equal after adjustment, thereby improving the display uniformity of the display panel.

[0160] For example, at least two different sub-pixels include a first sub-pixel and a second sub-pixel, and the brightness of the first sub-pixel is less than the brightness of the second sub-pixel. Fig. 9 As shown, in the embodiment of the present invention, the pulse width of the enable level of the first light emitting control signal PAM_EM of the first sub-pixel can be smaller than the pulse width of the enable level of the first light emitting control signal PAM_EM of the second sub-pixel, that is, a1<a2.

[0161] Optional, such as Fig. 9As shown, the embodiment of the present invention can make the time difference between the turn-on moment of the first light emitting control signal PAM_EM of the first sub-pixel and the turn-on moment of the second light emitting control signal PWM_EM greater than the time difference between the turn-on moment of the first light emitting control signal PAM_EM and the turn-on moment of the second light emitting control signal PWM_EM of the second sub-pixel, that is, make dt21>dt22, and make the pulse width of the enable level of the second light emitting control signal PWM_EM of the first sub-pixel equal to the pulse width of the enable level of the second light emitting control signal PWM_EM of the second sub-pixel, that is, make c1=c2, and make the time difference between the turn-off moment of the first light emitting control signal PAM_EM of the first sub-pixel and the turn-off moment of the second light emitting control signal PWM_EM equal to the time difference between the turn-off moment of the first light emitting control signal PAM_EM and the turn-off moment of the second light emitting control signal PWM_EM of the second sub-pixel, that is, make dt31=dt32, so as to achieve a1<a2.

[0162] Exemplarily, in an embodiment of the present invention, at least two different sub-pixels have the same target brightness. The target brightness is the ideal brightness that the sub-pixels in the two regions are expected to achieve. When the target brightness of two different sub-pixels is the same, the above method can compensate for the influence of factors such as different light-emitting moments or threshold voltage drift on the actual light-emitting brightness, reduce the difference in actual brightness of the two different sub-pixels, thereby improving the display effect and avoiding the problem of uneven display.

[0163] Exemplarily, the driving method of the above-mentioned display panel also includes: comparing the brightness of the same sub-pixel in different states; when the brightness of the sub-pixel in one state is less than the brightness in another state, making the first time of the sub-pixel in one state greater than the second time of the sub-pixel in another state, so that the actual brightness difference between the two after adjustment is reduced.

[0164] Optionally, in an embodiment of the present invention, the target brightness of the same sub-pixel in different states is the same. The target brightness is the ideal brightness that the sub-pixel in two periods can achieve. When the target brightness in two different states is the same, the above method can compensate for the influence of factors such as different light-emitting moments or threshold voltage drift on the actual light-emitting brightness, reduce the difference in the actual brightness of the sub-pixel in the two states, thereby improving the display effect and avoiding display abnormalities such as flickering.

[0165] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0166] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A display panel, characterized in that: comprising a plurality of sub-pixels; the sub-pixels receiving a first light emitting control signal; The display panel includes at least a first time and a second time, and the first time is different from the second time; wherein, The first time and the second time are respectively different light-emitting times of the sub-pixel; Or, the first time and the second time are respectively the turn-on time of the first light emitting control signal of different sub-pixels; Or, the first time and the second time are light-emitting times of the same sub-pixel in different states respectively; Alternatively, the first time and the second time are respectively the turn-on time of the first light emitting control signal of the same sub-pixel in different states.

2. The display panel according to claim 1, characterized in that: At the same target gray scale, the first time is different from the second time.

3. The display panel according to claim 1, characterized in that: The sub-pixel also receives a second signal; The time difference between the start time of the first light emitting control signal and the start time of the second light emitting control signal of at least two different sub-pixels is different; Or, the time difference between the start time of the first light emitting control signal and the start time of the second light emitting control signal in at least two different states of the same sub-pixel is different.

4. The display panel according to claim 3, characterized in that: The sub-pixel includes a pulse width modulation module and an amplitude modulation module, the amplitude modulation module corresponds to the first light emitting control signal, and the pulse width modulation module corresponds to the second signal.

5. The display panel according to claim 4, characterized in that: The sub-pixel includes a pixel driving circuit and a light-emitting element that are electrically connected; The pixel driving circuit comprises a second driving transistor, the pulse width modulation module and the amplitude modulation module; The second driving transistor is used for outputting a driving current according to a signal of a gate of the second driving transistor and a signal of a first terminal of the second driving transistor; The pulse width modulation module outputs a pulse width setting signal to the first end of the amplitude modulation module based on the sweep frequency signal and the second light emitting control signal to control the light emitting time of the light emitting element; The amplitude modulation module is used to control the light emitting element to emit light in response to the driving current under the control of the first light emitting control signal.

6. The display panel according to claim 5, characterized in that: The second signal includes the swept frequency signal.

7. The display panel according to claim 6, characterized in that: The start time of the frequency sweep signal is no later than the start time of the first light emitting control signal.

8. The display panel according to claim 6, characterized in that: The working process of the sub-pixel includes a data writing stage and a light emitting stage. During the data writing phase, the frequency sweep signal is at a high level; during a portion of the light emitting phase, the frequency sweep signal linearly decreases from a high level.

9. The display panel according to claim 6, characterized in that: The working process of the sub-pixel includes a data writing stage and a light emitting stage; In the data writing stage, the frequency sweep signal is at a low level; in a part of the light emitting stage, the frequency sweep signal jumps from a low level to a high level, and then linearly decreases from the high level.

10. The display panel according to claim 5, characterized in that: The second signal includes the second light emitting control signal.

11. The display panel according to claim 1, characterized in that: The display panel includes a plurality of sub-display areas, and the plurality of sub-display areas include at least a first sub-display area and a second sub-display area. The first sub-display area includes the first time, and the second sub-display area includes the second time.

12. The display panel according to claim 11, characterized in that: The sub-pixel also receives a second signal; In at least one of the sub-display areas, a time difference between a start-up time of the first light emission control signal and a start-up time of the second signal of at least two different sub-pixels is the same.

13. The display panel according to claim 11, characterized in that: The sub-pixel includes a pixel driving circuit and a light-emitting element that are electrically connected; The pixel driving circuit includes a pulse width modulation module, an amplitude modulation module and a driving transistor; The pulse width modulation module outputs a pulse width setting signal to the first end of the amplitude modulation module based on the frequency sweep signal and the second light emitting control signal. The driving transistor is used to output a driving current according to a signal of a gate of the driving transistor and a signal of a first terminal of the driving transistor; The amplitude modulation module is used to control the light emitting element to emit light in response to the driving current under the control of the first light emitting control signal, and output the pulse width setting signal to the gate of the driving transistor to control the light emitting time of the light emitting element; The first sub-display area and the second sub-display area receive different sweep frequency signals.

14. The display panel according to claim 13, characterized in that: A plurality of sub-pixels in the same sub-display area share one scanning signal.

15. The display panel according to claim 13, characterized in that: The frequency sweep signal includes a first frequency sweep signal and a second frequency sweep signal, the first sub-display area receives the first frequency sweep signal, and the second sub-display area receives the second frequency sweep signal; The frequency sweep signal includes a signal change period, and a change rate of the first frequency sweep signal in the signal change period is different from a change rate of the second frequency sweep signal in the signal change period.

16. The display panel according to claim 15, characterized in that: The frequency sweep signal has a difference between the maximum value and the minimum value during the signal variation period. The difference value of the first frequency sweep signal is different from the difference value of the second frequency sweep signal.

17. The display panel according to claim 15, characterized in that: The duration of the first frequency sweep signal in the signal change period is different from the duration of the second frequency sweep signal in the signal change period.

18. The display panel according to claim 13, characterized in that: The display panel includes a plurality of the first sub-display areas and a plurality of the second sub-display areas, and at least one second sub-display area is included between two adjacent first sub-display areas.

19. The display panel according to claim 13, characterized in that: The time difference between the start time of the frequency sweep signal and the start time of the first light emitting control signal of any two adjacent sub-display areas is different.

20. The display panel according to claim 19, characterized in that: According to the scanning sequence of the sub-display areas, the time difference between the start-up time of the frequency scanning signal and the start-up time of the first light emitting control signal in different sub-display areas gradually increases, or gradually decreases.

21. The display panel according to claim 13, characterized in that: The time difference between the start time of the second light emitting control signal and the start time of the first light emitting control signal of any two adjacent sub-display areas is different.

22. The display panel according to claim 21, characterized in that: According to the scanning sequence of the sub-display areas, the time difference between the start-up time of the second light emitting control signal and the start-up time of the first light emitting control signal in different sub-display areas gradually increases, or gradually decreases.

23. The display panel according to claim 1, characterized in that: comparing the brightness of at least two different sub-pixels, When the brightness of one of the sub-pixels is smaller than the brightness of another sub-pixel, The first time of one of the sub-pixels is made greater than the second time of another of the sub-pixels.

24. The display panel according to claim 23, characterized in that: At least two different sub-pixels have the same target brightness.

25. The display panel according to claim 1, characterized in that: Comparing the brightness of the same sub-pixel in different states; When the brightness of a sub-pixel in one state is less than that in another state, The first time that the sub-pixel is in one state is made greater than the second time that the sub-pixel is in another state.

26. The display panel according to claim 25, characterized in that: The target brightness of the same sub-pixel in different states is the same.

27. A display device, characterized in that: A display panel comprising any one of claims 1-26.

28. A method for driving a display panel, applied to the display panel according to any one of claims 1 to 26, characterized in that: The driving method comprises: Controlling the display panel includes at least a first time and a second time, the first time is different from the second time; wherein, The first time and the second time are respectively light-emitting times of different sub-pixels; Or, the first time and the second time are respectively the turn-on time of the first light emitting control signal of the different sub-pixels; Or, the first time and the second time are light-emitting times of the same sub-pixel in different states respectively; Alternatively, the first time and the second time are respectively the turn-on time of the first light emitting control signal of the same sub-pixel in different states.

29. The driving method according to claim 28, characterized in that: comparing the brightness of at least two different sub-pixels, When the brightness of one of the sub-pixels is smaller than the brightness of another sub-pixel, The first time of one of the sub-pixels is made greater than the second time of another of the sub-pixels.

30. The driving method according to claim 29, characterized in that: At least two different sub-pixels have the same target brightness.

31. The driving method according to claim 28, characterized in that: Comparing the brightness of the same sub-pixel in different states; When the brightness of a sub-pixel in one state is less than that in another state, The first time that the sub-pixel is in one state is made greater than the second time that the sub-pixel is in another state.

32. The driving method according to claim 31, characterized in that: The target brightness of the same sub-pixel in different states is the same.

Images