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 brightness consistency of the display panel. The display panel comprises sub-pixels, the sub-pixels have different states, and the different states comprise different luminous intensities of the sub-pixels or different first data signals received by the sub-pixels; or the first power supply signals received by the sub-pixels are different; wherein the sub-pixels have different states, namely, the same sub-pixel corresponds to different states in different periods, or the sub-pixels in at least two different areas are 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, the display panel includes sub-pixels, the sub-pixels have different states, the different states include different luminous intensities of the sub-pixels, or different first data signals received by the sub-pixels; or different first power signals received by the sub-pixels; wherein,

[0006] The sub-pixel having different states includes: the same sub-pixel corresponds to different states at different times, or sub-pixels in at least two different regions are in different states.

[0007] In a second aspect, an embodiment of the present application provides a display device, comprising the above-mentioned display panel.

[0008] In a third aspect, an embodiment of the present application provides a method for driving a display panel, which is applied to the above-mentioned display panel. The driving method includes:

[0009] The sub-pixels are controlled to have different states, where the different states include different luminous intensities of the sub-pixels, or different first data signals received by the sub-pixels; or different first power signals received by the sub-pixels; wherein,

[0010] The sub-pixel having different states includes: the same sub-pixel corresponds to different states at different times, or sub-pixels in at least two different regions are in different states.

[0011] The display panel and its driving method and display device provided by the embodiments of the present invention can compensate for the brightness differences caused by factors such as different light-emitting moments of sub-pixels or different threshold voltage offsets by making the sub-pixels have different states, that is, making the luminous intensity of the sub-pixels different, or the first data signals received by the sub-pixels different; or the first power signals received by the sub-pixels different, which is beneficial to improving the display consistency of the display panel in different states. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] 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.

[0013] Figure 1 A schematic diagram of a sub-pixel circuit provided by an embodiment of the present invention;

[0014] Figure 2 A schematic diagram of another sub-pixel circuit provided by an embodiment of the present invention;

[0015] Figure 3 A schematic diagram of a circuit of another sub-pixel provided by an embodiment of the present invention;

[0016] Figure 4 for Figure 3 A working timing diagram of the pixel driving circuit shown;

[0017] Figure 5 for Figure 3 Another working timing diagram of the pixel driving circuit shown;

[0018] Figure 6 for Figure 3 Another working timing diagram of the pixel driving circuit shown;

[0019] Figure 7 A working timing diagram of a sub-pixel in two frame periods provided by an embodiment of the present invention;

[0020] Figure 8 A working timing diagram of two different sub-pixels provided by an embodiment of the present invention;

[0021] Fig. 9 A schematic diagram of a display panel provided by an embodiment of the present invention;

[0022] Fig.10 A schematic diagram of a display unit provided by an embodiment of the present invention;

[0023] Fig.11 A schematic diagram of another display panel provided by an embodiment of the present invention;

[0024] Fig.12 A working timing diagram of a display panel provided by an embodiment of the present invention;

[0025] Fig.13 A schematic diagram of another display panel provided by an embodiment of the present invention;

[0026] Fig.14 A schematic diagram of another display panel provided by an embodiment of the present invention;

[0027] Fig.15 A schematic diagram of another display panel provided by an embodiment of the present invention;

[0028] Fig.16 A schematic diagram of a display device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] An embodiment of the present invention provides a display panel, the display panel includes a plurality of sub-pixels, such as Figure 1 As shown, Figure 1A 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 (LED), and the light-emitting diode includes a sub-millimeter light-emitting diode (Mini Light Emitting Diode, referred to as Mini LED), 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.

[0034] like Figure 1 As shown, the pixel driving circuit 11 at least includes a driving transistor Tm. The driving transistor Tm is used to output a driving current according to a signal applied to its gate and the first end, and the light-emitting element 12 is lit under the action of the driving current. The process of the pixel driving circuit 11 driving the light-emitting element 12 to emit light is the process of controlling the light-emitting element 12 to emit light within a cycle of a picture display (i.e., a frame time) with a specific driving current within an effective light-emitting duration. The brightness of the light-emitting element 12 is related to the light-emitting intensity and effective light-emitting duration of the light-emitting element 12. The light-emitting intensity of the light-emitting element 12 is related to the driving current.

[0035] In an embodiment of the present invention, the sub-pixel 1 has different states. Exemplarily, the sub-pixel 1 having different states includes: the same sub-pixel 1 corresponds to different states in different periods, wherein the 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, the above-mentioned different periods may also be different sub-frames within a frame period. Or, the sub-pixel 1 having different states includes: the sub-pixels 1 in at least two different areas of the display panel are in different states; wherein different areas refer to sub-pixels located at different positions of the display panel.

[0036] In an embodiment of the present invention, in an optional implementation, different states include different luminous intensities. The above sub-pixels having different states means that the luminous intensities of the sub-pixels are different. In an embodiment of the present invention, the luminous intensity of sub-pixel 1 is the luminous intensity of light-emitting element 12. Among them, the luminous intensity of sub-pixel 1 can be the instantaneous luminous intensity of sub-pixel 1, and the instantaneous luminous intensity refers to the luminous intensity of sub-pixel 1 at the moment of lighting. Or it can also be the luminous intensity of light-emitting element 12 at a certain moment or time point in the middle period of the light-emitting stage. The instantaneous luminous intensity of sub-pixel 1 is related to the driving current that drives sub-pixel 1 to emit light. The larger the driving current, the greater the current density, and the greater the instantaneous luminous intensity. Among them, the instantaneous luminous intensity of sub-pixel 1 can generally be determined by detecting its luminous brightness in microsecond level time. The brightness of sub-pixel 1 in a display cycle (such as a frame) is related to the instantaneous luminous intensity and the effective luminous duration. The greater the instantaneous luminous intensity, or the longer the effective luminous duration, the greater the brightness of sub-pixel 1 in a display cycle.

[0037] Alternatively, the different states described in the embodiment of the present invention include different first data signals. In this case, the sub-pixel 1 having different states means that the sub-pixel 1 receives different first data signals. The first data signal may affect the driving current of the sub-pixel.

[0038] Alternatively, the different states described in the embodiment of the present invention include different first power signals. In this case, the sub-pixel 1 having different states means that the sub-pixel 1 receives different first power signals. The first power signal can affect the driving current of the sub-pixel.

[0039] Taking the example that different states include the first state and the second state, in the embodiment of the present invention, the sub-pixel 1 has different states, including that the same sub-pixel 1 corresponds to the first state and the second state respectively at different periods. For example, the sub-pixel 1 has the first state in the first period and the second state in the second period. Alternatively, the display panel includes sub-pixels 1 in at least two different regions, and among the sub-pixels 1 in the at least two different regions, the sub-pixels 1 in one region have the first state, and the sub-pixels 1 in the other region have the second state.

[0040] Illustratively, in an embodiment of the present invention, the luminous intensity of sub-pixel 1 in the first state is different from the luminous intensity in the second state; or, the first data signal received by sub-pixel 1 in the first state is different from the first data signal received by the sub-pixel in the second state, or, the first power signal received by sub-pixel 1 in the first state is different from the first power signal received by the sub-pixel in the second state.

[0041] In the embodiment of the present invention, when the pixel driving circuit 11 is set, in an optional implementation manner, as shown in FIG. Figure 1 As 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 first 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 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 of the light emitting device.

[0042] 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 first data signal line DATA, and the first electrode is electrically connected to the first power signal line PVDD. That is, the first 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. The embodiment of the present invention can adjust the magnitude of the driving current Id by adjusting the first data signal DATA or the first power signal PVDD, thereby adjusting the luminous intensity of the light-emitting element 12.

[0043] In another optional embodiment, if Figure 2 As shown, Figure 2 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 emitting control transistor M5, a second light emitting control transistor M6 and a storage capacitor Cst.

[0044] In one frame period, the working process of the pixel driving circuit 11 at least includes a reset phase, a data writing phase and a light emitting phase.

[0045] 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.

[0046] 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.

[0047] 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 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 PVDD The embodiment of the present invention can adjust the magnitude of the driving current Id by adjusting the first data signal DATA or the first power signal PVDD, thereby adjusting the luminous intensity of the light emitting element 12 .

[0048] The embodiment of the present invention makes the sub-pixel 1 have different states, that is, makes the luminous intensity of the sub-pixel 1 different, or the first data signal received by the sub-pixel 1 is different; or the first power signal received by the sub-pixel 1 is different, so as to compensate for the brightness difference caused by factors such as different luminous moments of the sub-pixels or different threshold voltage offsets, which is beneficial to improving the display consistency of the display panel in different states.

[0049] Exemplarily, the target grayscales in the above-mentioned different states are the same. That is, the above-mentioned different states refer to different states under the common reference standard of the same target grayscale. For example, the different states include different first states and second states, wherein the target grayscales in the first state and the second state are the same. The target grayscale is related to the image data received by the sub-pixel, 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 makes the target grayscales in different states the same, combined with the above-mentioned brightness uniformity improvement means including making the luminous intensity of the sub-pixel different, or the first data signal received by the sub-pixel different; or the first power supply signal received by the sub-pixel different, so that the actual brightness of the sub-pixel at the same target grayscale tends to be consistent, thereby improving the brightness uniformity of the display panel. Among them, the actual brightness can be obtained by detecting by a brightness detection instrument, and the actual brightness refers to the brightness displayed after taking into account the influencing factors such as the different luminous moments of the sub-pixel or the drift of the threshold voltage.

[0050] 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 be any circuit that can regulate the first data signal or the first power supply signal during the operation of the pixel driving circuit 11 to change the driving current of the pixel driving circuit 11.

[0051] Optional, such as Figure 3 and Figure 4 As shown, Figure 3 A circuit diagram of another sub-pixel provided by an embodiment of the present invention, Figure 4 for Figure 3 A working timing diagram of a pixel driving circuit is shown, where the pixel driving circuit 11 includes an electrically connected pulse width modulation (PWM) module 10 and an amplitude modulation (PAM) module 20, and the amplitude modulation module 20 is electrically connected to the light emitting element 12.

[0052] 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. The amplitude modulation module 20 corresponds to the first data signal PAM_DATA, that is, the amplitude modulation module 20 receives the first data signal PAM_DATA; the pulse width modulation module 10 corresponds to the second data signal PWM_DATA, that is, the pulse width modulation module 10 receives the second data signal PWM_DATA.

[0053] Specifically, 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 to control the duration of providing the driving current to the light emitting element 12. Figure 3 In the embodiment, the first end of the amplitude modulation module 20 is electrically connected to the first node N1. The amplitude modulation module 20 is configured to control the magnitude of the driving current provided to the light emitting element 12 based on the first data signal PAM_DATA and the first power signal PAM_PVDD.

[0054] Optional, such as Figure 3 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.

[0055] 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 pulse width light-emitting control signal PWM_EM.

[0056] The amplitude modulation module 20 includes a second driving transistor M7, 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.

[0057] 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 is configured to generate 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 scanning signal PAM_S1; the gates of the second data writing transistor M9, the second compensation transistor M10 and the electrode reset transistor M13 receive the second amplitude scanning signal PAM_S2. The gates of the third emission control transistor M11 and the fourth emission control transistor M12 receive the amplitude emission control signal PAM_EM.

[0058] It should be noted that Figure 3 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.

[0059] For example, Figure 4 As shown, within a frame period, the working process of the pixel driving circuit 11 includes a writing stage P1 and a light emitting stage P2. Optionally, the writing stage P1 can be divided into a first writing stage t1 and a second writing stage t2. Optionally, a frame period corresponding to a sub-pixel is a data refresh period, that is, a period of the first writing stage t1.

[0060] 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 .

[0061] 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.

[0062] 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.

[0063] 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 .

[0064] 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.

[0065] 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.

[0066] Then, the light-emitting stage P2 is entered. In the light-emitting stage P2, 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 to control the time for the amplitude modulation module 20 to provide the driving current, thereby adjusting the effective light-emitting time of the light-emitting element 12, and further controlling the light-emitting brightness of the light-emitting element 12. Wherein, the 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.

[0067] It should be noted that the above-mentioned light-emitting stage P2 is not a 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, that is, the duration of the effective light-emitting period is shorter than the duration of the light-emitting stage P2. The light-emitting stage P2 can be understood as a stage in which the amplitude light-emitting control signal PAM_EM and the pulse width light-emitting control signal PWM_EM are at the enable level. In the light-emitting stage P2, the amplitude 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 drive transistor M7 generates a drive current under the control of its gate voltage, and the amplitude modulation module 20 provides a drive current to the light-emitting element 12. The pulse width light-emitting control signal PWM_EM controls the first light-emitting control transistor M6 and the second light-emitting control transistor M5 to turn on. The stage in which the amplitude light-emitting control signal PAM_EM and the pulse width light-emitting control signal PWM_EM are at the enable level includes a signal change period. In 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 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 pulse width modulation module 10 gradually raises the potential of the first node N1. Finally, the first driving transistor M1 is turned on and the second power signal PWM_PVDD is supplied to the first node N1 via the first light-emitting control transistor M6. This causes the gate voltage of the second driving transistor M7 to change, so that 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.

[0068] Figure 4 The time point t3′ is illustrated in FIG. 1 , which is the time point when the second driving transistor M7 is turned off. The time period between the effective pulse start time of the amplitude light emitting control signal PAM_EM and the time point t3′ is the effective light emitting period t31 of the light emitting element 12 .

[0069] It can be known from the above description of the working process of the pixel driving circuit 11 that the embodiment of the present invention can adjust the effective light-emitting time of the light-emitting element 12 by adjusting the second data signal PWM_DATA and the sweep signal SWEEP, and adjust the magnitude of the driving current provided by the pixel driving circuit 11 to the light-emitting element 12 by adjusting the first data signal PAM_DATA and the first power signal PAM_PVDD.

[0070] Optionally, the embodiment of the present invention also provides another timing diagram that can be used to drive Figure 3 The pixel driving circuit provided in the embodiment is as follows: Figure 5 As shown, Figure 5 for Figure 3 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.

[0071] For example, Figure 4 and Figure 5 As shown, at least in the second data writing phase t22, that is, at least in the period of providing the enable signal to the second pulse width scanning signal PWM_S2, 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 a low level to a high level, and the voltage value changes by △V SWEEP In the light-emitting stage P2, the frequency sweep signal SWEEP is a ramp signal that gradually changes from a high level to a low level. Since the frequency sweep signal line 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.

[0072] When the threshold voltage Vg' of the first driving transistor M1 is fixed, the frequency sweep signal SWEEP adopts Figure 4 The illustrated timing can reduce the required voltage value of the second data signal PWM_DATA. In other words, when the voltage value of the second data signal PWM_DATA is fixed, after the data is written, the gate voltage of the first driving transistor M1 will be raised due to the signal jump of the sweep signal SWEEP. When the level of the sweep signal SWEEP gradually changes at a fixed rate, 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, based on this embodiment, the waveform design of the sweep signal SWEEP can increase the degree of freedom in regulating the flow period of the driving current.

[0073] In other embodiments, Figure 6 As shown, Figure 6 for Figure 3 In another working timing diagram of the pixel driving circuit shown in FIG. 1 , in the initial period of the writing phase P1 and the light-emitting phase P2, the embodiment of the present invention can also make the sweep signal SWEEP a high level, and in the light-emitting phase P2, make the sweep signal SWEEP gradually change from a high level to a low level, and the voltage value change amount is △V SWEEP In this case, the initial gate voltage Vg1 = V PWM_DATA -|Vth|.

[0074] In the embodiment of the present invention, the first data signal PAM_DATA corresponding to the sub-pixel 1 is different in different states. For example, for the same sub-pixel, the embodiment of the present invention can make the sub-pixel receive different first data signals PAM_DATA at different periods, so that the sub-pixel works in different states at different periods. Alternatively, the embodiment of the present invention can also make the sub-pixels in different areas receive different first data signals PAM_DATA, so that the sub-pixels in the two areas work in different states.

[0075] Based on this setting manner, the brightness uniformity of the sub-pixel 1 in different states is improved by differentially setting the first data signal PAM_DATA.

[0076] Exemplarily, the different first data signals PAM_DATA can enable the sub-pixel 1 to be driven with a larger current density in different states, thereby reducing the possibility of color shift of the light-emitting element 12 .

[0077] In an optional implementation, in different states, the second data signal PWM_DATA corresponding to the sub-pixel is the same. Exemplarily, the second data signal PWM_DATA may correspond to the target grayscale of the sub-pixel 1 in the current frame period.

[0078] For example, for the same sub-pixel, the embodiment of the present invention can make the sub-pixel receive the same second data signal PWM_DATA at different periods, which, combined with the above-mentioned method of making the sub-pixel receive different first data signals PAM_DATA at different periods, can make the sub-pixel 1 work in different states at different periods to improve the brightness consistency of the display panel. Moreover, by adopting this setting method, the driving method of the second data signal PWM_DATA can also be simplified.

[0079] Alternatively, the embodiment of the present invention can also make the second data signal PWM_DATA corresponding to the sub-pixels 1 located in different areas the same, and cooperate with the above-mentioned method of making the sub-pixels 1 located in different areas receive different first data signals PAM_DATA, so that the sub-pixels 1 located in different areas can work in different states respectively, so as to improve the brightness consistency of the display panel. Moreover, adopting this setting method can also simplify the driving method of the second data signal PWM_DATA.

[0080] It should be noted that Figure 3 The structures of the transistors in the pixel driving circuit shown are for illustration only. The embodiments of the present invention do not limit the types of transistors in the pixel driving circuit, and those skilled in the art may set them according to actual conditions. For example, the conductivity type of the transistor may be N-type or P-type, the structure of the transistor may be single-gate or double-gate, and the active layer of the transistor may be polysilicon, amorphous silicon or oxide semiconductor material, etc.

[0081] Exemplarily, in an embodiment of the present invention, the display panel includes a plurality of sub-pixels with different colors. For example, the display panel includes a red sub-pixel, a green sub-pixel, and a blue sub-pixel. In different states, the first data signal PAM_DATA corresponding to the sub-pixel 1 of the same color is different. Based on this setting, the sub-pixel 1 of the same color can be operated in different states to compensate for the brightness difference caused by factors such as different light-emitting moments or different threshold voltage drifts, so that the brightness of the sub-pixels of the same color in a display cycle tends to be consistent, thereby improving display uniformity.

[0082] Exemplarily, in an embodiment of the present invention, in different states, the first data signals PAM_DATA corresponding to at least two red sub-pixels are different; or, the first data signals PAM_DATA corresponding to at least two green sub-pixels are different; or, the first data signals PAM_DATA corresponding to at least two blue sub-pixels are different.

[0083] Exemplarily, the above different states include different first states and second states. In an embodiment of the present invention, in an optional implementation, the first data signal in the first state is different from the first data signal in the second state. For example, when sub-pixel 1 is set to include Figure 3 In the pixel driving circuit shown in the figure, the same sub-pixel 1 receives different first data signals PAM_DATA at different times, so that the sub-pixel 1 works in different first and second states, avoiding flickering caused by inconsistent brightness of the sub-pixel 1 over time, and improving the display effect. Figure 7 As shown, Figure 7 A working timing diagram of a sub-pixel in two different frame periods is provided in an embodiment of the present invention, wherein the voltage value of the first data signal PAM_DATA received by the sub-pixel in one frame period F1 is V1, and the voltage value of the first data signal PAM_DATA received in another frame period F2 is V2, and V1≠V2.

[0084] Alternatively, different sub-pixels 1 located in different areas of the display panel receive different first data signals PAM_DATA, so that the sub-pixels 1 in at least two areas respectively operate in different first states and second states, so as to improve the brightness consistency of different areas of the display panel. Figure 8 As shown, Figure 8 An embodiment of the present invention provides a working timing diagram of two different sub-pixels, wherein the voltage value of the first data signal PAM_DATA received by one sub-pixel is V3, and the voltage value of the first data signal PAM_DATA received by the other sub-pixel is V4, and V3≠V4. Figure 8 As an example, the timings of the first amplitude scanning signal PAM_S1, the second amplitude scanning signal PAM_S2, the first pulse width scanning signal PWM_S1, the second pulse width scanning signal PWM_S2, the amplitude light emitting control signal PAM_EM, the pulse width light emitting control signal PWM_EM and the sweeping signal SWEEP received by two different sub-pixels are the same. Figure 8 In the figure, the waveforms of the first data signal PAM_DATA received by two different sub-pixels are distinguished by the solid line and the dotted line, and the waveforms of the first power signal PAM_PVDD received by two different sub-pixels are distinguished by the solid line and the dotted line.

[0085] Alternatively, in another optional implementation, the first power signal in the first state is different from the first power signal in the second state. Figure 3In the pixel driving circuit shown in the figure, the same sub-pixel 1 receives different first power signals PAM_PVDD at different times, so that the sub-pixel 1 works in different first and second states, avoiding flickering caused by inconsistent brightness of the sub-pixel 1 over time, thereby improving the display effect. Figure 7 As shown, the voltage value of the first power signal PAM_PVDD received by the sub-pixel in one frame period F1 is V5, and the voltage value of the first power signal PAM_PVDD received by the sub-pixel in another frame period F2 is V6, and V5≠V6.

[0086] Alternatively, different sub-pixels 1 located in different areas of the display panel receive different first power signals PAM_PVDD, so that the at least two sub-pixels 1 operate in different first and second states, respectively, to improve the brightness consistency of different areas of the display panel. Figure 8 As shown, the voltage value of the first power signal PAM_PVDD received by one sub-pixel is V7, and the voltage value of the first power signal PAM_PVDD received by another sub-pixel is V8, and V7≠V8.

[0087] For example, Fig. 9 As shown, Fig. 9 A schematic diagram of a display panel provided for an embodiment of the present invention, the display panel includes multiple sub-display areas A, and in the embodiment of the present invention, the sub-pixels 1 of at least two different sub-display areas A receive different first data signals; or, the sub-pixels 1 of at least two different sub-display areas A receive different first power signals.

[0088] The plurality of sub-display areas A at least include a first sub-display area A1 and a second sub-display area A2, and the sub-pixel 1 has the following Figure 3 Taking the structure shown as an example, in an embodiment of the present invention, the first data signal PAM_DATA received by the sub-pixel 1 in the first sub-display area A1 is different from the first data signal PAM_DATA received by the sub-pixel 1 in the second sub-display area A2; or, the first power signal PAM_PVDD received by the sub-pixel 1 in the first sub-display area A1 is different from the first power signal PAM_PVDD received by the sub-pixel 1 in the second sub-display area A2.

[0089] 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. 9As 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.

[0090] Exemplarily, in an embodiment of the present invention, Fig. 9 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. 9 As shown, the plurality of display parts 30 at least include a first display part 301 and a second display part 302, the first display part 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 part 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 at the same time, the plurality of second sub-display areas A2 can emit light at the same time, the plurality of third sub-display areas A3 can emit light at the same time, and the plurality of fourth sub-display areas A3 can emit light at the same time.

[0091] like Fig. 9 As 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.

[0092] 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 1 of the display panel being simultaneously lit by dividing the display area of ​​the display panel into multiple sub-display areas and making different sub-display areas A light up in 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.

[0093] Moreover, the embodiment of the present invention makes the sub-pixels 1 in at least two different sub-display areas A receive different first data signals; or, the sub-pixels 1 in at least two different sub-display areas A receive different first power signals. When driving the display panel, the sub-pixels 1 in at least two different sub-display areas A can be made to operate in different states. For example, the sub-pixels 1 in the first sub-display area A1 can operate in one of the first state and the second state, and the sub-pixels 1 in the second sub-display area A2 can operate in the other of the first state and the second state. Thus, the driving currents of the sub-pixels 1 in at least two different sub-display areas A1 can be set differentially, thereby compensating for the uneven brightness problem of the sub-pixels 1 in different sub-display areas A due to different light-emitting moments, which is beneficial to improving the brightness consistency of different areas of the display panel.

[0094] 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.

[0095] like Fig.10 As shown, Fig.10 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.

[0096] Or, if Fig.11 As shown, Fig.11 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.

[0097] When driving the display panel, exemplarily, in combination with Figure 3 and Fig.12 As shown, Fig.12 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.

[0098] 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 pulse width light emission control signal PWM_EM, and the same amplitude light emission control signal PAM_EM, so that 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 sweep signals SWEEP, pulse width light emission control signals PWM_EM, and amplitude light emission control signals PAM_EM required for the operation of the display panel can be reduced.

[0099] like Fig.12 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.

[0100] 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.12 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.

[0101] In the first data signal writing phase DA1, the first amplitude scanning signal PAM_S1 and the second amplitude scanning signal PAM_S2 provide enable levels successively. When the second amplitude scanning signal PAM_S2 provides 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.

[0102] 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 provide enable levels row by row. Then enter the first light-emitting phase E1. In the first light-emitting phase E1, the pulse width light-emitting control signal PWM_EM[A1] and the amplitude light-emitting signal PAM_EM[A1] in the first sub-display area A1 provide enable levels, and the m sub-pixel rows in the first sub-display area A1 emit light. The driving current flowing through the sub-pixels is related to the first data signal PAM_DATA and the first power signal PAM_PVDD received by each. The light-emitting duration is related to the written second data signal PWM_DATA and the sweep signal SWEEP.

[0103] 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 driven, and each stage is similar to the driving process of the corresponding stage of the first sub-display area A1. The difference from the first sub-display area A1 is that in the first data signal writing stage DA2, the first data signal PAM_DATA written to the sub-pixel in the second sub-display area A2 is different from the first data signal PAM_DATA written to the sub-pixel in the first sub-display area A1 in the first data signal writing stage DA1. In the first data signal writing stage DA3, the first data signal PAM_DATA written to the sub-pixel in the third sub-display area A3 is different from the first data signal PAM_DATA written to the sub-pixel in the first sub-display area A1 in the first data signal writing stage DA1, and is also different from the first data signal PAM_DATA written to the sub-pixel in the second sub-display area A2 in the first data signal writing stage DA2.

[0104] In an embodiment of the present invention, by writing different first data signals PAM_DATA to different sub-display areas A, compared with a method of writing the same first data signal to all sub-display areas, different first data signals PAM_DATA can be used to compensate for brightness variations in each sub-display area A due to different light-emitting moments, driving signal fluctuations, drift of threshold voltage characteristics of the driving transistor and other factors, thereby improving the brightness consistency of each sub-display area A.

[0105] exist Fig.12 In 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.

[0106] In the frequency sweep signal SWEEP[j], the pulse width light emission control signal PWM_EM[j] and the amplitude light emission 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 frequency sweep signal SWEEP[A1], the pulse width light emission control signal PWM_EM[A1] and the amplitude light emission control signal PAM_EM[A1]. That is, multiple pixel driving circuits in a sub-display area share a frequency sweep signal SWEEP, a pulse width light emission control signal PWM_EM, and a amplitude light emission control signal PAM_EM, so that multiple sub-pixels in the same sub-display area emit light simultaneously.

[0107] Optionally, in an embodiment of the present invention, multiple sub-pixels in the same sub-display area A share a first data signal PAM_DATA, wherein sharing means that the first data signal PAM_DATA received by multiple sub-pixels 1 in the same sub-display area A is the same. Based on this setting, the driving currents of multiple sub-pixels 1 in the same sub-display area A can be made as consistent as possible, and multiple sub-pixels 1 in the same sub-display area can all operate in a high uniformity and high efficiency range. Moreover, when driving the display, the same first data signal PAM_DATA is provided to multiple sub-pixels 1 in the same sub-display area A, and the driving method is simpler.

[0108] Optionally, in an embodiment of the present invention, multiple sub-pixels 1 of the same color in the same sub-display area A share a first data signal PAM_DATA, wherein sharing means that the first data signal PAM_DATA received by the multiple sub-pixels 1 of the same color in the same sub-display area A is the same. Optionally, in an embodiment of the present invention, multiple sub-pixels 1 of the same color in the same sub-display area A can share a first data signal PAM_DATA at the same target grayscale, so that the driving currents of the multiple sub-pixels 1 of the same color are as consistent as possible, and the multiple sub-pixels 1 of the same color work in a high uniformity and high efficiency range. Moreover, the same first data signal PAM_DATA is provided to multiple sub-pixels 1 of the same color during driving and displaying, and the driving method is simpler.

[0109] For example, under the same target grayscale, the embodiment of the present invention can also use the same first data signal PAM_DATA to drive sub-pixels 1 of different colors in the same sub-display area A, so that the driving currents of sub-pixels 1 of different colors are as consistent as possible, and sub-pixels 1 of different colors work in a high uniformity and high efficiency range. Moreover, when driving the display, the same first data signal PAM_DATA is provided to sub-pixels 1 of different colors, and the driving method is simpler.

[0110] For example, in the embodiment of the present invention, the first data signals of any two adjacent sub-display areas A are different. Based on this setting, different sub-display areas A can adjust the first data signals they receive according to their respective light-emitting moments, so that the driving currents of any two adjacent sub-display areas match their light-emitting moments, thereby being able to more finely adjust the actual brightness of each sub-display area A, which is conducive to further improving the display consistency of the display panel.

[0111] Optionally, in the embodiment of the present invention, the first data signals PAM_DATA of any two sub-display areas A can be different, so as to adjust the display uniformity of different sub-display areas A.

[0112] In an optional implementation, according to the scanning order of the sub-display area A, the embodiment of the present invention can make the first data signal PAM_DATA of different sub-display areas A gradually increase, or gradually decrease. The scanning order is the time sequence of executing the above data writing stage. Fig.12 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. Therefore, the first data signal PAM_DATA received by the first sub-display area A1, the second sub-display area A2 and the third sub-display area A3 can be gradually increased or gradually decreased in sequence. Based on this setting, the influence of the different scanning sequences on the actual brightness of each sub-display area A can be compensated, and the display uniformity of the display panel can be further improved.

[0113] In another optional implementation, the embodiment of the present invention can make the first power signal PAM_PVDD of any two adjacent sub-display areas A different. The first power signal PAM_PVDD can affect the driving current of the sub-pixel 1. Based on this setting, different sub-display areas A can adjust the first power signal PAM_PVDD they receive according to their respective light-emitting moments, so that the driving current of any two adjacent sub-display areas A can be matched with 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.

[0114] Optionally, in the embodiment of the present invention, the first power signals PAM_PVDD of any two sub-display areas A can be different, so as to adjust the display uniformity of different sub-display areas A.

[0115] Exemplarily, in the embodiment of the present invention, according to the scanning sequence of the sub-display areas A, the first power signal PAM_PVDD of different sub-display areas A gradually increases, or gradually decreases. Fig.12In 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 first power signal PAM_PVDD received by the first sub-display area A1, the second sub-display area A2 and the third sub-display area A3 can be gradually increased or gradually decreased in sequence. Based on this setting, the influence of the different scanning sequences on the actual brightness of each sub-display area A can be compensated, and the display uniformity of the display panel can be further improved.

[0116] For example, Fig.13 As shown, Fig.13 A schematic diagram of another display panel provided by an embodiment of the present invention, the display panel includes a plurality of pixel rows 3 arranged along a first direction h1, the pixel rows 3 include a plurality of sub-pixels 1 arranged along a second direction h2, the sub-pixels 1 include a pixel driving circuit 11, the pixel driving circuit 11 includes an amplitude modulation module 20 and a pulse width modulation module 10 electrically connected. The first direction h1 intersects with the second direction h2, Fig.12 The two are perpendicular to each other as an illustration.

[0117] like Fig.13 As shown, the display panel also includes a scanning signal line SWEEP, a first pulse width scanning signal line PWM_S1, a second pulse width scanning signal line PWM_S2, a pulse width light-emitting control signal line PWM_EM, an amplitude light-emitting control signal line PAM_EM, a first amplitude scanning signal line PAM_S1, a second amplitude scanning signal line PAM_S2, a first data signal line PAM_DATA and a first power signal line PAM_PVDD, which are arranged along a first direction h1 and extend along a second direction h2. Among them, the sweep signal line SWEEP is used to provide a sweep signal SWEEP to the pixel driving circuit 11 (in this article, the signal line and the signal it transmits are illustrated with the same mark to more concisely and intuitively illustrate the relationship between the two), the first pulse width scanning signal line PWM_S1 is used to provide the first pulse width scanning signal PWM_S1 to the pixel driving circuit 11, the second pulse width scanning signal line PWM_S2 is used to provide the second pulse width scanning signal PWM_S2 to the pixel driving circuit 11, the pulse width light-emitting control signal line PWM_EM is used to provide the pulse width light-emitting control signal PWM_EM to the pixel driving circuit 11, the first amplitude scanning signal line PAM_S1 is used to provide the first amplitude scanning signal PAM_S1 to the pixel driving circuit 11, the second amplitude scanning signal line PAM_S2 is used to provide the second amplitude scanning signal PAM_S2 to the pixel driving circuit 11, the first data signal line PAM_DATA is used to provide the first data signal PAM_DATA to the pixel driving circuit 11; the first power signal line PAM_PVDD is used to provide the first power signal PAM_PVDD to the pixel driving circuit 11.

[0118] In the embodiment of the present invention, the display panel includes a plurality of signal transmission lines L1, and the signal transmission lines L1 are used to transmit the first data signal PAM_DATA or the first power signal PAM_PVDD; in the embodiment of the present invention, the same pixel row 3 corresponds to the same signal transmission line L. That is, the same pixel row 3 receives the same first data signal PAM_DATA or the first power signal PAM_PVDD through the same signal transmission line L.

[0119] Optionally, the signal transmission line L1 includes the first data signal line PAM_DATA and / or the first power signal line PAM_PVDD. The first data signal line PAM_DATA transmits the first data signal PAM_DATA. The first power signal line PAM_PVDD transmits the first power signal PAM_PVDD. Fig.13 As an example, a display panel includes two signal transmission lines L1 corresponding to a pixel row 3 , one of which is a first data signal line PAM_DATA for transmitting a first data signal, and the other is a first power signal line PAM_PVDD for transmitting a first power signal.

[0120] Based on this setting method, the first data signal line PAM_DATA can provide different first data signals PAM_DATA to at least two different pixel rows 3, or the first power signal line PAM_PVDD can provide different first power signals PAM_PVDD to at least two different pixel rows 3, so as to provide differentiated first data signals PAM_DATA or first power signals PAM_PVDD to sub-pixels 1 in different areas, thereby improving the display uniformity of the display panel. Fig.13 In the figure, the first data signal line PAM_DATA[n] provides the first data signal PAM_DATA to the n-th pixel row 3, the first power signal line PAM_PVDD[n] provides the first power signal PAM_PVDD to the n-th pixel row 3, the first data signal line PAM_DATA[n+1] provides another first data signal PAM_DATA to the n+1-th pixel row 3, and the first power signal line PAM_PVDD[n] provides another first power signal PAM_PVDD to the n+1-th pixel row 3 as an illustration.

[0121] In the embodiment of the present invention, two adjacent pixel rows 3 correspond to different first data signals PAM_DATA; or, two adjacent pixel rows 3 correspond to different first power signals PAM_PVDD.

[0122] Exemplarily, when the display area of ​​the display panel is divided into a plurality of sub-display areas, two adjacent pixel rows 3 may belong to the same sub-display area A.

[0123] When the sub-display area A includes multiple pixel rows 3, based on this setting method, the brightness of the sub-pixels in two adjacent pixel rows 3 in the same sub-display area A can be differentially compensated to achieve a more refined adjustment of the brightness of the display panel, which is conducive to further improving the brightness consistency of different pixel rows 3 in the same sub-display area A.

[0124] For example, Fig.14 As shown, Fig.14 A schematic diagram of another display panel provided in an embodiment of the present invention, in which the signal transmission line L1 includes a first signal transmission line L11 and a second signal transmission line L12; the first signal transmission line L11 and the second signal transmission line L12 are respectively used to provide signals to sub-pixels 1 located in different sub-display areas A, so that the sub-pixels 1 located in different sub-display areas A have different states. In the embodiment of the present invention, in different states, the signals of the first signal transmission line L1 and the second signal transmission line L2 are different.

[0125] Wherein, in different states, the signals of the first signal transmission line L11 and the second signal transmission line L12 are different, including:

[0126] The first signal transmission line L11 and the second signal transmission line L12 are electrically connected to the same sub-pixel 1 , and the two transmit different signals to the sub-pixel 1 in a time-sharing manner, so that the same sub-pixel 1 corresponds to different states at different times.

[0127] Alternatively, the first signal transmission line L11 and the second signal transmission line L12 are respectively electrically connected to the sub-pixels 1 in at least two different areas. For example, the first signal transmission line L11 is electrically connected to the sub-pixels 1 in the first sub-display area A1, and the second signal transmission line L12 is electrically connected to the sub-pixels 1 in the second sub-display area A2, so that the sub-pixels 1 in at least two different areas are in different states.

[0128] For example, the different states include a first state and a second state. In an embodiment of the present invention, the first signal transmission line L11 can be used to transmit a signal to the x-th pixel row so that the x-th pixel row has a first state. The second signal transmission line L12 can be used to transmit a signal to the x-th pixel row in another period so that the x-th pixel row has a second state in another period. Exemplarily, in this case, the first signal transmission line L11 and the second signal transmission line L12 can be combined into one signal transmission line, which can provide different signals to the sub-pixels at different periods.

[0129] Alternatively, the first signal transmission line L11 is used to transmit a signal to the x-th pixel row so that the x-th pixel row has a first state. The second signal transmission line L12 is used to transmit a signal to the y-th pixel row different from the x-th pixel row so that the y-th pixel row has a second state. Wherein, x≠y, and x and y are both positive integers.

[0130] It should be noted that, in the embodiment of the present invention, the first signal transmission line L11 and the second signal transmission line L12 transmit signals of the same function. For example, the first signal transmission line L11 and the second signal transmission line L12 both transmit the first data signal PAM_DATA, or the first signal transmission line L11 and the second signal transmission line L12 both transmit the first power signal PAM_PVDD. In order to more clearly describe the embodiment of the present invention, the first signal transmission line that transmits the first data signal PAM_DATA is named as the first A data signal line PAM_DATA1, and the first signal transmission line that transmits the first power signal PAM_PVDD is named as the first A power signal line PAM_PVDD1. And, the second signal transmission line that transmits the first data signal PAM_DATA is named as the second A data signal line PAM_DATA2, and the second signal transmission line that transmits the first power signal PAM_PVDD is named as the second A power signal line PAM_PVDD2.

[0131] In different states, the signals transmitted by the first A data signal line PAM_DATA1 and the second A data signal line PAM_DATA2 have the same function, that is, both are the first data signal PAM_DATA, but the sizes of the two are different. The signals transmitted by the first A power signal line PAM_PVDD1 and the second A power signal line PAM_PVDD2 have the same function, that is, both are the first power signal PAM_PVDD, but the sizes of the two are different.

[0132] For example, Fig.14 As shown, the display panel includes a driving circuit 4, which is located at one side of the display area AA in the first direction h1 and is electrically connected to the signal transmission line L1. The driving circuit 4 is used to provide the first data signal PAM_DATA or the first power signal PAM_PVDD.

[0133] In an embodiment of the present invention, the display panel also includes a connecting portion L2 electrically connected to the signal transmission line L1, the signal transmission line L1 extends along the second direction h2, the connecting portion L2 extends along the first direction h1, the signal transmission line L1 is electrically connected to the pixel row 3 in the sub-display area A, and the connecting portion L2 is electrically connected to the signal transmission line L1 and the driving circuit 4.

[0134] Fig.14Taking the display panel including the first sub-display area A1 and the second sub-display area A2 as an example, correspondingly, the signal transmission line L1 includes a first signal transmission line L11 corresponding to the first sub-display area A1 and a second signal transmission line L12 corresponding to the second sub-display area A2. The connection portion L2 includes a first connection portion L21 electrically connected to the first signal transmission line L11 and a second connection portion L22 electrically connected to the second signal transmission line L12, the first signal transmission line L11 and the second signal transmission line L12 extend along the second direction h2, and the first connection portion L21 and the second connection portion L22 extend along the first direction h1; the first signal transmission line L11 is electrically connected to a plurality of sub-pixels 1 in the first sub-display area A1, the second signal transmission line L12 is electrically connected to a plurality of sub-pixels 1 in the second sub-display area A2, and the first connection portion L21 electrically connects the first signal transmission line L11 and the driving circuit 4. The second connection portion L22 electrically connects the second signal transmission line L12 and the driving circuit 4.

[0135] Exemplarily, the signal transmission line L1 may be electrically connected to the driving circuit 4 through at least two connection portions L2. Fig.14 As shown, the first signal transmission line L11 is electrically connected to the driving circuit 4 through two first connection parts L21, and the second signal transmission line L12 is electrically connected to the corresponding driving circuit 4 through two second connection parts L22. Based on this setting, the transmission rate of the corresponding signal can be improved and the voltage drop during the signal transmission process can be reduced.

[0136] In the embodiment of the present invention, the display panel further includes a plurality of scanning signal lines, and the extending direction of the scanning signal lines is parallel to the extending direction of the signal transmission line L1. Fig.13 As shown, the scanning signal line includes any one or more of the above-mentioned first pulse width scanning signal line PWM_S1, the second pulse width scanning signal line PWM_S2, the pulse width light emitting control signal line PWM_EM, the amplitude light emitting control signal line PAM_EM, the first amplitude scanning signal line PAM_S1, and the second amplitude scanning signal line PAM_S2.

[0137] Optional, such as Fig.15 As shown, Fig.15A schematic diagram of another display panel provided for an embodiment of the present invention, in which the signal transmission line L1 can be arranged to include a plurality of sub-signal transmission lines L10 arranged along the second direction h2, and two adjacent sub-signal transmission lines L10 are arranged at intervals; the sub-signal transmission line L10 is electrically connected to the above-mentioned connection portion L2. Exemplarily, one sub-signal transmission line L10 is electrically connected to at least one connection portion L2. In an embodiment of the present invention, the connection portion L2 corresponding to one of the sub-display areas A is located between two adjacent sub-signal transmission lines L10 corresponding to another sub-display area A, thereby avoiding the cross-line design of the connection portion L2 corresponding to one of the sub-display areas A and the signal transmission line L1 located in the other sub-display area A, and reducing the coupling capacitance between the two.

[0138] When the display panel is configured to include a first sub display area A1 and a second sub display area A2, as shown in FIG. Fig.15 As shown, the first signal transmission line L11 corresponding to the first sub-display area A1 includes a plurality of first sub-signal transmission lines L110 arranged along the second direction h2, and two adjacent first sub-signal transmission lines L110 are arranged at intervals; the first sub-signal transmission line L110 is electrically connected to the above-mentioned first connection portion L21, and illustratively, one first sub-signal transmission line L110 is electrically connected to at least one first connection portion L21.

[0139] The second signal transmission lines L21 corresponding to the second sub-display area A2 include a plurality of second signal transmission lines L120 arranged along the second direction h2, and two adjacent second signal transmission lines L120 are arranged at intervals; the second signal transmission lines L120 are electrically connected to the second connection portion L22. Exemplarily, one second signal transmission line L120 is electrically connected to at least one second connection portion L22.

[0140] like Fig.14 As shown, the second connection portion L22 is at least partially located between two adjacent first sub-signal transmission lines L110. Based on this arrangement, the first signal transmission line L11 and the second connection portion L22 can be prevented from crossing, thereby preventing the two from crossing lines and reducing the coupling capacitance between the two.

[0141] like Fig.14 As shown, the first connection portion L21 is at least partially located between two adjacent second sub-signal transmission lines L120. Based on this arrangement, the second signal transmission line L21 and the first connection portion L12 can be prevented from crossing, thereby preventing the two from crossing over, and reducing the coupling capacitance between the two.

[0142] For example, Fig.14 As shown, the first sub-signal transmission line L110 and the second sub-signal transmission line L120 are at least partially staggered in the first direction h1.

[0143] Exemplarily, in an embodiment of the present invention, the sub-signal transmission line L10 and the connection portion L2 may be arranged in the same layer. For example, at least two of the first sub-signal transmission line L110, the second sub-signal transmission line L120, the first connection portion L21, and the second connection portion L22 may be arranged in the same layer. Based on this arrangement, the manufacturing process of the display panel can be simplified, and the thickness of the display panel can be reduced.

[0144] Optionally, when driving the display panel, in an optional implementation, the embodiment of the present invention may first compare the brightness of sub-pixels in two different regions. The brightness is the actual brightness of the sub-pixels. The actual brightness can be detected by a brightness detection instrument. When the brightness of the sub-pixels in one region is less than the brightness of the sub-pixels in another region, the embodiment of the present invention may make the first data signal received by the sub-pixels in one region less than the first data signal received by the sub-pixels in another region, so as to increase the luminous intensity of the sub-pixels in one region and reduce the luminous intensity of the sub-pixels in another region, so as to reduce the difference in actual brightness between the two after adjustment, for example, to make the actual brightness of the two regions equal after adjustment, thereby improving the display uniformity of the display panel.

[0145] Alternatively, an embodiment of the present invention may also make the first power signal received by the sub-pixels in one area greater than the first power signal received by the sub-pixels in another area, so as to increase the luminous intensity of the sub-pixels in one area and reduce the luminous intensity of the sub-pixels in another area, so as to reduce the difference in actual brightness between the two after adjustment, for example, to make the actual brightness of the two areas equal after adjustment, thereby improving the display uniformity of the display panel.

[0146] Exemplarily, the display panel includes Fig. 9 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. For example, the initial brightness of the sub-pixels in the first sub-display area A1 and the second sub-display area A2 can be the brightness of the two under the same first initial data signal. Alternatively, the initial brightness of the sub-pixels in the first sub-display area A1 and the second sub-display area A2 can be the brightness of the two under the same first initial power signal.

[0147] When the initial brightness of the sub-pixels in the first sub-display area A1 is lower 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 data signal or the first power signal received by the first sub-display area A1 and the second sub-display area A2, so that the first data signal received by the sub-pixels in the first sub-display area A1 is lower than the first data signal received by the sub-pixels in the second sub-display area A2, or, the first power signal received by the sub-pixels in the first sub-display area A1 is higher than the first power signal received by the sub-pixels in the second sub-display area A2, so as to increase the luminous intensity of the sub-pixels in the first sub-display area A1, and reduce the luminous intensity of the sub-pixels in the second sub-display area A2, so that the difference in actual brightness between the two after adjustment is reduced, for example, so that the actual brightness of the sub-pixels in the first sub-display area A1 and the second sub-display area A2 after adjustment tend to be consistent.

[0148] Optional, such as Figure 8 As shown, in the embodiment of the present invention, the waveform of the first data signal PAM_DATA indicated by a dotted line represents the first data signal PAM_DATA received by the sub-pixels in the first sub-display area A1, and the waveform of the first data signal PAM_DATA indicated by a solid line represents the first data signal PAM_DATA received by the sub-pixels in the second sub-display area A2. Figure 8 As shown, the embodiment of the present invention can make the first data signal PAM_DATA received by the sub-pixels in the first sub-display area A1 smaller than the first data signal PAM_DATA received by the sub-pixels in the second sub-display area A2, that is, make V3<V4.

[0149] Or, if Figure 8 As shown, in the embodiment of the present invention, the waveform of the first power signal PAM_PVDD indicated by a solid line represents the first power signal PAM_PVDD received by the sub-pixels in the first sub-display area A1, and the waveform of the first power signal PAM_PVDD indicated by a dotted line represents the first power signal PAM_PVDD received by the sub-pixels in the second sub-display area A2. Figure 8 As shown, in the embodiment of the present invention, the first power signal PAM_PVDD received by the sub-pixels in the first sub-display area A1 can be greater than the first power signal PAM_PVDD received by the sub-pixels in the second sub-display area A2, that is, V7>V8.

[0150] Exemplarily, in an embodiment of the present invention, the target brightness of sub-pixels in two different regions 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 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 light-emitting brightness, reduce the difference in actual brightness of sub-pixels in two different regions, thereby improving the display effect and avoiding the problem of uneven display.

[0151] In another optional implementation, the embodiment of the present invention may also first compare the brightness of the same sub-pixel in two different periods. When there is a difference in the brightness of the sub-pixel in the two different periods, for example, when the brightness of the sub-pixel in one period is less than the brightness of the other period, the embodiment of the present invention may make the first data signal received by the sub-pixel in one period less than the first data signal received in the other period, or the embodiment of the present invention may make the first power signal received by the sub-pixel in one period greater than the first power signal received in the other period, so as to reduce the difference in actual brightness between the two after adjustment.

[0152] Take two different periods including two different frame periods as an example, combined with Figure 7 As shown, when the brightness of a sub-pixel in one frame period F1 is less than the brightness in another frame period F2, the embodiment of the present invention can make the first data signal PAM_DATA received by the sub-pixel in the frame period F1 smaller than the first data signal PAM_DATA received in the frame period F2, that is, make V1<V2. Or, as Figure 7 As shown, in the embodiment of the present invention, the first power signal PAM_PVDD received by the sub-pixel in the frame period F1 may be smaller than the first power signal PAM_PVDD received in the frame period F2, that is, V5>V6.

[0153] Exemplarily, in an embodiment of the present invention, the target brightness of the sub-pixels in the two periods is the same. The target brightness is the ideal brightness that the sub-pixels in the two periods can achieve. When the target brightness of the sub-pixels in two different periods 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-pixels in the two different periods, thereby improving the display effect and avoiding the problem of uneven display.

[0154] Based on the same inventive concept, an embodiment of the present invention further provides a display device, such as Fig.16 As shown, Fig.16Schematic 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.

[0155] Based on the same inventive concept, an embodiment of the present invention further provides a method for driving a display panel, which is applied to the above-mentioned display panel. The method includes:

[0156] The sub-pixels are controlled to have different states, where the different states include different luminous intensities of the sub-pixels, or different first data signals received by the sub-pixels; or different first power signals received by the sub-pixels; wherein,

[0157] The sub-pixel having different states includes: the same sub-pixel corresponds to different states at different times, or sub-pixels in at least two different regions are in different states.

[0158] The embodiments of the present invention make the sub-pixels have different states, that is, make the luminous intensity of the sub-pixels different, or make the first data signals received by the sub-pixels different; or make the first power signals received by the sub-pixels different, so as to compensate for the brightness differences of the sub-pixels caused by factors such as different luminous moments or different threshold voltage offsets, which is beneficial to improving the display consistency of the display panel in different states and improving the display effect of the display panel.

[0159] Exemplarily, the target grayscales in the above different states are the same, that is, the above different states refer to different states under the same target grayscale, which is a common reference standard.

[0160] Optionally, the driving method of the display panel further includes:

[0161] Compare the brightness of sub-pixels in two different regions;

[0162] When the brightness of the sub-pixels in one area is lower than the brightness of the sub-pixels in another area,

[0163] The first data signal received by the sub-pixels in one area is made smaller than the first data signal received by the sub-pixels in another area, or the first power signal received by the sub-pixels in one area is made larger than the first power signal received by the sub-pixels in another area.

[0164] By means of the above configuration, the luminous intensity of the sub-pixels in one region can be increased, and the luminous intensity of the sub-pixels in another region can be reduced, so that the difference in actual brightness between the two regions after adjustment is reduced, for example, the actual brightness of the two regions after adjustment is equal.

[0165] Exemplarily, in an embodiment of the present invention, the target brightness of sub-pixels in two different regions is the same. When the target brightness of 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 light-emitting brightness, reduce the difference in actual brightness of sub-pixels in two different regions, thereby improving the display effect and avoiding the problem of uneven display.

[0166] Exemplarily, the driving method of the display panel further includes:

[0167] Compare the brightness of the sub-pixel at two different times;

[0168] When the brightness of the sub-pixel in one period is smaller than the brightness of the sub-pixel in another period,

[0169] The first data signal received by the sub-pixel in one period is made smaller than the first data signal received by the sub-pixel in another period, or the first power signal received by the sub-pixel in one period is made larger than the first power signal received by the sub-pixel in another period.

[0170] Through the above setting, the luminous intensity of the sub-pixel in one period can be increased, and the luminous intensity of the sub-pixel in another period can be reduced, so that the difference in actual brightness between the two after adjustment is reduced, for example, the actual brightness of the two periods after adjustment is equal.

[0171] Exemplarily, the brightness mentioned above includes the actual brightness of the sub-pixel.

[0172] Exemplarily, in the embodiment of the present invention, the target brightness of the sub-pixels at two different periods is the same. When the target brightness of the sub-pixels at two different periods 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-pixels at two different moments, thereby improving the display effect and avoiding display abnormalities such as flickering.

[0173] 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.

[0174] 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: The display panel includes sub-pixels, and the sub-pixels have different states, and the different states include different luminous intensities of the sub-pixels, or different first data signals received by the sub-pixels; or different first power signals received by the sub-pixels; wherein, The sub-pixel having different states includes: the same sub-pixel corresponds to the different states at different times, or the sub-pixels in at least two different regions are in the different states.

2. The display panel according to claim 1, characterized in that: The different states include different first states and second states, wherein the target grayscales of the first state and the second state are the same.

3. The display panel according to claim 1, characterized in that: The sub-pixel comprises a pulse width modulation module and an amplitude modulation module, the amplitude modulation module corresponds to the first data signal, and the pulse width modulation module corresponds to the second data signal; In the different states, the first data signals corresponding to the sub-pixels are different, and the second data signals are the same.

4. The display panel according to claim 1 or 3, characterized in that: In the different states, the sub-pixels of the same color correspond to different first data signals.

5. The display panel according to claim 1, characterized in that: The different states include different first states and second states, the first data signal in the first state is different from the first data signal in the second state, or the first power signal in the first state is different from the first power signal in the second state.

6. The display panel according to claim 5, 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. 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 controls the light emitting element to emit light in response to the driving current based on the first data signal and the first power signal, and outputs the pulse width setting signal to the gate of the driving transistor to control the light emitting time of the light emitting element.

7. 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 data signal received by the sub-pixel in the first sub-display area is different from the first data signal received by the sub-pixel in the second sub-display area; or, The first power signal received by the sub-pixel in the first sub-display area is different from the first power signal received by the sub-pixel in the second sub-display area.

8. The display panel according to claim 7, characterized in that: A plurality of sub-pixels of the same color in the same sub-display area share one first data signal.

9. The display panel according to claim 7, characterized in that: The first data signals of any two adjacent sub-display areas are different.

10. The display panel according to claim 9, characterized in that: According to the scanning sequence of the sub-display areas, the first data signals of different sub-display areas gradually increase or gradually decrease.

11. The display panel according to claim 7, characterized in that: The first power signals of any two adjacent sub-display areas are different.

12. The display panel according to claim 11, characterized in that: According to the scanning sequence of the sub-display areas, the first power supply signals of different sub-display areas gradually increase or gradually decrease.

13. The display panel according to claim 7, characterized in that: The display panel includes a plurality of signal transmission lines and a plurality of pixel rows arranged along a first direction, wherein the pixel rows include a plurality of sub-pixels arranged along a second direction; the signal transmission lines are used to transmit the first data signal or the first power signal; The same pixel row corresponds to the same signal transmission line.

14. The display panel according to claim 13, characterized in that: Two adjacent pixel rows correspond to different first data signals; Alternatively, two adjacent pixel rows correspond to different first power signals.

15. The display panel according to claim 13, characterized in that: The signal transmission line comprises: a first signal transmission line; a second signal transmission line; in the different states, the signals of the first signal transmission line and the second signal transmission line are different; The first sub-display area and the second sub-display area are arranged along the first direction; the first sub-display area and the second sub-display area include a plurality of sub-pixels arranged along the second direction; The display panel further includes a first connection portion electrically connected to the first signal transmission line, the first signal transmission line extends along the second direction, and the first connection portion extends along the first direction; the first signal transmission line is electrically connected to a plurality of the sub-pixels in the first sub-display area, and the first connection portion is electrically connected to the first signal transmission line and a data driving circuit; The display panel also includes a second connecting portion electrically connected to the second signal transmission line, the second signal transmission line extends along the second direction, and the second connecting portion extends along the first direction; the second signal transmission line is electrically connected to the plurality of sub-pixels in the second sub-display area, and the second connecting portion is electrically connected to the second signal transmission line and the data driving circuit.

16. The display panel according to claim 15, characterized in that: The first signal transmission line includes a plurality of first sub-signal transmission lines arranged along the second direction, and two adjacent first sub-signal transmission lines are arranged at intervals; The second connecting portion is at least partially located between two adjacent first sub-signal transmission lines.

17. The display panel according to claim 16, characterized in that: At least two of the first sub-signal transmission line, the first connecting portion, and the second connecting portion are arranged in the same layer.

18. The display panel according to claim 15, characterized in that: It also includes a plurality of scanning signal lines, wherein the extending directions of the scanning signal lines are parallel to the extending directions of the first signal transmission lines and the second signal transmission lines.

19. The display panel according to claim 1, characterized in that: comparing the brightness of the sub-pixels in two different regions, When the brightness of the sub-pixels in one area is smaller than the brightness of the sub-pixels in another area, The first data signal received by the sub-pixels in one area is made smaller than the first data signal received by the sub-pixels in another area, or, The first power signal received by the sub-pixels in one area is made greater than the first power signal received by the sub-pixels in another area.

20. The display panel according to claim 19, characterized in that: The target brightness of the sub-pixels in two different regions is the same.

21. The display panel according to claim 1, characterized in that: Compare the brightness of the sub-pixel at two different time periods, When the brightness of the sub-pixel in one period is smaller than the brightness of the sub-pixel in another period, making the first data signal received by the sub-pixel in one period smaller than the first data signal received by the sub-pixel in another period, or, The first power signal received by the sub-pixel in one period is made greater than the first power signal received by the sub-pixel in another period.

22. The display panel according to claim 21, characterized in that: The target brightness of the sub-pixel in two different periods is the same.

23. A display device, characterized in that: A display panel comprising any one of claims 1-22.

24. A method for driving a display panel, applied to the display panel according to any one of claims 1 to 22, characterized in that: The driving method comprises: The sub-pixel is controlled to have different states, wherein the different states include different luminous intensities of the sub-pixel, or different first data signals received by the sub-pixel; or different first power signals received by the sub-pixel; wherein, The sub-pixel having different states includes: the same sub-pixel corresponds to the different states at different times, or the sub-pixels in at least two different regions are in the different states.

25. The method for driving a display panel according to claim 24, characterized in that: Also includes: comparing the brightness of the sub-pixels in two different regions, When the brightness of the sub-pixels in one area is smaller than the brightness of the sub-pixels in another area, The first data signal received by the sub-pixels in one area is made smaller than the first data signal received by the sub-pixels in another area, or, The first power signal received by the sub-pixels in one area is made greater than the first power signal received by the sub-pixels in another area.

26. The driving method according to claim 25, characterized in that: The target brightness of the sub-pixels in two different regions is the same.

27. The method for driving a display panel according to claim 24, wherein: Also includes: Compare the brightness of the sub-pixel at two different time periods, When the brightness of the sub-pixel in one period is smaller than the brightness of the sub-pixel in another period, making the first data signal received by the sub-pixel in one period smaller than the first data signal received by the sub-pixel in another period, or, The first power signal received by the sub-pixel in one period is made greater than the first power signal received by the sub-pixel in another period.

28. The driving method according to claim 27, characterized in that: The target brightness of the sub-pixel in two different periods is the same.

Images