Display panel, display panel driving method and display device

Abstract

The present invention discloses a display panel, a driving method of the display panel and a display device. The display panel includes a display area and a non-display area, wherein the non-display area at least partially surrounds the display area; a first pixel circuit is provided in the display area, and a second pixel circuit, a sensing unit and an adjusting unit are provided in the non-display area, wherein the leakage path of the control electrode of the driving module in the first pixel circuit and the second pixel circuit is the same; the sensing unit is connected to the second pixel circuit, and the sensing unit is used to sense the change of the control electrode potential of the driving module in the second pixel circuit; the adjusting unit is connected to the sensing unit, and the adjusting unit is used to adjust the power supply signal of the first pixel circuit according to the change of the control electrode potential. The driving current formed by the driving module in the first pixel circuit can be controlled to remain unchanged. When the first pixel circuit drives the first light-emitting unit to emit light, the light-emitting stability of the first light-emitting unit can be improved, thereby improving the flickering phenomenon of the display panel.

Description

Technical Field

[0001] Embodiments of the present invention relate to the technical field of display, and in particular, to a display panel, a driving method of the display panel, and a display device. Background Art

[0002] Active-matrix organic light emitting diode (AMOLED) display panels have been widely used in the display field because they are superior to liquid crystal display panels in terms of display color saturation, power consumption and bending. AMOLED display panels include pixel driving circuits and light-emitting devices. The pixel driving circuit provides a driving current for the light-emitting device to drive the light-emitting device to emit light, thereby realizing the display of the display panel. During the operation of the pixel driving circuit, there is leakage in the gate of the driving transistor in the pixel driving circuit, which causes the gate potential of the driving transistor to change. When the driving transistor forms a driving current according to the gate potential and the source potential, the driving current is unstable, which causes the light-emitting brightness of the light-emitting device to be unstable, resulting in flickering of the display panel. Summary of the invention

[0003] The present invention provides a display panel, a driving method of the display panel and a display device, so as to improve the display effect of the display panel.

[0004] In a first aspect, an embodiment of the present invention provides a display panel, comprising a display area and a non-display area, wherein the non-display area at least partially surrounds the display area;

[0005] The display area is provided with a first pixel circuit, and the non-display area is provided with a second pixel circuit, a sensing unit and an adjustment unit. The leakage paths of the control electrodes of the driving modules in the first pixel circuit and the second pixel circuit are the same; the sensing unit is connected to the second pixel circuit, and is used to sense the change in the control electrode potential of the driving module in the second pixel circuit; the adjustment unit is connected to the sensing unit, and is used to adjust the power signal of the first pixel circuit according to the change in the control electrode potential.

[0006] Optionally, the first pixel circuit and the second pixel circuit have the same circuit topology structure; the first pixel circuit and the second pixel circuit operate in the same manner.

[0007] Optionally, the display area further includes a first data line, and the non-display area further includes a second data signal line;

[0008] The first data line is connected to the first pixel circuit, and the second data signal line is connected to the second pixel circuit. The first data signal line is used to provide a first data signal to the first pixel circuit during a data writing phase; the second data signal line is used to provide a second data signal to the second pixel circuit during the data writing phase.

[0009] Optionally, the sensing unit includes a sensing signal line, which is connected to the control electrode of the driving module in the second pixel circuit, and the sensing signal line is used to sense the control electrode potential of the driving module in the second pixel circuit at the starting point of the light-emitting stage and during the light-emitting stage respectively; the adjustment unit is used to adjust the power signal of the first pixel circuit according to the change in the control electrode potential; wherein the change in the control electrode potential is the difference between the potential of the control electrode of the driving module at the starting point of the light-emitting stage and the potential of the control electrode of the driving module during the light-emitting stage.

[0010] Optionally, the display area further includes a first light-emitting unit, a first power signal line, and a second power signal line; the first power signal line is connected to a first pole of a driving module in the first pixel circuit, a first end of the first light-emitting unit is connected to a second pole of the driving module in the first pixel circuit, and a second end of the first light-emitting unit is connected to the second power signal line; the regulating unit is used to regulate the first power signal provided by the first power signal line according to the change amount of the control electrode potential;

[0011] Preferably, the regulating unit is further used to regulate the second power signal provided by the second power signal line according to the change amount of the control electrode potential, and the difference between the first power signal and the second power signal remains unchanged.

[0012] Optionally, the display area further includes a first light-emitting unit, and the non-display area further includes a second light-emitting unit, the first light-emitting unit is connected to the first pixel circuit, and the second light-emitting unit is connected to the second pixel circuit; the first light-emitting unit and the second light-emitting unit have the same structure.

[0013] Optionally, the non-display area is provided with at least two of the second pixel circuits and at least two of the sensing units;

[0014] The sensing unit is connected to the second pixel circuit correspondingly, the sensing unit is used to sense the change of the control electrode potential of the driving module in the correspondingly connected second pixel circuit, and the regulating unit is used to regulate the power supply signal of the first pixel circuit according to the change of the control electrode potential provided by at least one of the sensing units;

[0015] Preferably, the non-display area is arranged at one side of the display area; the non-display area is provided with two second pixel circuits, and the two second pixel circuits are symmetrically arranged about a midline from the display area to the non-display area.

[0016] In a second aspect, an embodiment of the present invention further provides a method for driving a display panel, which is used to drive the display panel described in the first aspect; the method comprises:

[0017] The sensing unit senses a change in the control electrode potential of the driving module in the second pixel circuit;

[0018] The regulating unit regulates the power supply signal of the first pixel circuit according to the change of the control electrode potential.

[0019] Optionally, the sensing unit includes a sensing signal line, and the sensing signal line is connected to a control electrode of a driving module in the second pixel circuit; characterized in that:

[0020] The sensing unit senses the control electrode potential of the driving module in the second pixel circuit, including:

[0021] The sensing signal line senses the control electrode potential of the driving module in the second pixel circuit at the starting point of the light emitting phase and during the light emitting phase respectively;

[0022] The regulating unit regulates the power supply signal of the first pixel circuit according to the change of the control electrode potential, including:

[0023] The regulating unit regulates the power signal of the first pixel circuit according to the change in the control electrode potential; wherein the change in the control electrode potential is the difference between the potential of the control electrode of the driving module at the starting point of the light-emitting stage and the potential of the control electrode of the driving module during the light-emitting stage.

[0024] In a third aspect, an embodiment of the present invention further provides a display device, comprising the display panel described in the first aspect.

[0025] The technical solution of the embodiment of the present invention is to set a second pixel circuit in the non-display area, and the second pixel circuit has the same leakage path as the first pixel circuit, so that the change of the control electrode potential of the driving module in the second pixel circuit can represent the change of the control electrode potential of the driving module in the first pixel circuit. The change of the control electrode potential of the driving module in the second pixel circuit is sensed by the sensing unit to represent the change of the control electrode potential of the driving module in the first pixel circuit. The power supply signal in the first pixel circuit is adjusted by the regulating unit according to the change of the control electrode potential of the driving module in the second pixel circuit, so that the voltage difference between the control electrode potential and the first electrode potential of the driving module in the first pixel circuit can be controlled to remain unchanged, and then the driving current formed by the driving module can be controlled to remain unchanged. When the first pixel circuit drives the first light-emitting unit to emit light, the light-emitting stability of the first light-emitting unit can be improved, thereby improving the flickering phenomenon of the display panel. Moreover, during the adjustment process, the normal operation of the first pixel circuit can be guaranteed, so that the display area can emit light normally, and at the same time, the change of the control electrode potential of the driving module in the first pixel circuit can be sensed in real time in the non-display area, which can not only keep the voltage difference between the control potential of the driving module and the first electrode potential unchanged, but also avoid affecting the structural setting of the display area, which is conducive to simplifying the design of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of the structure of a pixel driving circuit provided by the prior art;

[0027] Figure 2 A schematic diagram of the structure of a display panel provided by an embodiment of the present invention;

[0028] Figure 3 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0029] Figure 4 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0030] Figure 5 A schematic structural diagram of a first pixel circuit provided by an embodiment of the present invention;

[0031] Figure 6 A schematic diagram of the timing of different signals provided by an embodiment of the present invention;

[0032] Figure 7 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0033] Figure 8 A schematic diagram of the structure of another display panel provided by an embodiment of the present invention;

[0034] Fig. 9A schematic flow chart of a method for driving a display panel provided by an embodiment of the present invention;

[0035] Fig.10 A schematic structural diagram of a display device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0036] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0037] Figure 1 The following is a schematic diagram of a pixel driving circuit provided by the prior art. Figure 1 As shown, the pixel driving circuit includes a driving transistor Mdr, a data writing transistor M1, a threshold compensation transistor M2, a first light emission control transistor M3, a second light emission control transistor M4, a gate initialization transistor M5, an anode initialization transistor M6 and a storage capacitor Cst. The driving transistor Mdr, the data writing transistor M1, the threshold compensation transistor M2, the first light emission control transistor M3, the second light emission control transistor M4, the gate initialization transistor M5, and the anode initialization transistor M6 are exemplarily shown to be P-type transistors, such as LTPO transistors. The specific connection relationship is as follows Figure 1 As shown. During the operation of the pixel driving circuit, in the initialization stage, the gate initialization transistor M5 and the anode initialization transistor M6 are turned on, and the initialization voltage is written into the gate of the driving transistor Mdr through the gate initialization transistor M5 to realize the gate initialization of the driving transistor Mdr, so that the driving transistor Mdr is turned on. At the same time, the initialization voltage is written into the anode of the light-emitting device D1 through the anode initialization transistor M6 to realize the anode initialization of the light-emitting device D1. In the data writing stage, the driving transistor Mdr is in the on state, the data writing transistor M1 and the threshold compensation transistor M2 are in the on state, and the data voltage vdata is written into the gate of the driving transistor Mdr through the data writing transistor M1, the driving transistor Mdr and the threshold compensation transistor M2, so as to realize the writing of the data voltage vdata and the threshold compensation of the driving transistor Mdr, and the storage capacitor Cst maintains the gate potential of the driving transistor Mdr. In the light-emitting stage, the first light-emitting control transistor M3 and the second light-emitting control transistor M4 are turned on, and the driving transistor Mdr forms a driving current according to the first voltage provided by the first voltage input terminal Vdd and the gate potential, and transmits the driving current to the anode of the light-emitting device D1 through the second light-emitting control transistor M4, driving the light-emitting device D1 to emit light.

[0038] The threshold compensation transistor M2 and the gate initialization transistor M5 may have a cut-off current in the cut-off state. In the light-emitting stage, the gate potential of the driving transistor Mdr leaks through the threshold compensation transistor M2 and the gate initialization transistor M5, causing the gate potential of the driving transistor Mdr to change, thereby causing the light-emitting brightness of the light-emitting device D1 to be unstable, causing the flickering phenomenon of the display panel. Especially when the pixel driving circuit operates at a low refresh rate, the light-emitting stage is relatively long, the gate potential of the driving transistor Mdr changes greatly, the light-emitting brightness of the light-emitting device D1 changes significantly, and the flickering phenomenon of the display panel is relatively obvious.

[0039] In view of the above technical problem, an embodiment of the present invention provides a display panel. Figure 2 FIG. 1 is a schematic diagram of a display panel provided by an embodiment of the present invention. Figure 2 As shown, the display panel includes a display area 110 and a non-display area 120, and the non-display area 120 at least partially surrounds the display area 110; the display area 110 is provided with a first pixel circuit P1, and the non-display area 120 is provided with a second pixel circuit P2, a sensing unit 121 and an adjustment unit 122, and the leakage path of the control electrode of the driving module in the first pixel circuit P1 and the second pixel circuit P2 is the same; the sensing unit 121 is connected to the second pixel circuit P2, and the sensing unit 121 is used to sense the change of the control electrode potential of the driving module in the second pixel circuit P2, and the adjustment unit 122 is connected to the sensing unit 121, and the adjustment unit 122 is used to adjust the power signal of the first pixel circuit P1 according to the change of the control electrode potential.

[0040] Specifically, the display area 110 may be a conventional display area of ​​the display panel, or an unconventional display area of ​​the display panel, such as a secondary screen display area. The non-display area 120 may be a border area of ​​the display panel, or a surrounding area of ​​the display area, such as a transition area around the secondary screen display area. Figure 2 It is exemplarily shown in the figure that the display area 110 is a regular display area, the non-display area 120 is a border area, and the non-display area 120 is arranged around the display area 110 .

[0041] The first pixel circuit P1 has a plurality of first light-emitting units 111, and the display area 110 is also provided with a plurality of first light-emitting units 111, and the first pixel circuit P1 is connected to the first light-emitting units 111 accordingly. Each first pixel circuit P1 includes at least a driving module, and the driving module forms a driving current according to the potential of the control electrode and the potential of the first electrode, and transmits it to the correspondingly connected first light-emitting unit 111, drives the first light-emitting unit 111 to emit light, and realizes the display of the display area 110. The first pixel circuit P1 also includes a switch module for controlling the working state of the first pixel circuit P1. The second pixel circuit P2 includes at least a driving module, and may also include a switch module. When the control electrodes of the driving modules in the first pixel circuit P1 and the second pixel circuit P2 have the same leakage path, after the control electrode potentials of the driving modules in the first pixel circuit P1 and the second pixel circuit P2 are written with the data voltage, the leakage ratio of the control electrode potential of the driving module in the first pixel circuit P1 is the same as the leakage ratio of the control electrode potential of the driving module in the second pixel circuit P2, so that the change of the control electrode potential of the driving module in the second pixel circuit P2 can represent the change of the control electrode potential of the driving module in the first pixel circuit P1. Wherein, the leakage ratio may be the ratio of the leakage amount of the control electrode potential of the driving module to the initial potential of the control electrode of the driving module in the same time; the initial potential of the control electrode of the driving module is the written data voltage. Exemplarily, when the control electrode potential of the driving module in the first pixel circuit P1 and the second pixel circuit P2 writes the same data voltage, the leakage rate of the control electrode potential of the driving module in the first pixel circuit P1 is the same as the leakage rate of the control electrode potential of the driving module in the second pixel circuit P2, so that the leakage amount of the control electrode potential of the driving module in the first pixel circuit P1 is the same as the leakage amount of the control electrode potential of the driving module in the second pixel circuit P2, so the leakage ratio of the control electrode potential of the driving module in the first pixel circuit P1 is the same as the leakage ratio of the control electrode potential of the driving module in the second pixel circuit P2, at this time, the change of the control electrode potential of the driving module in the second pixel circuit P2 is the same as the change of the control electrode potential of the driving module in the first pixel circuit P1, so the change of the control electrode potential of the driving module in the first pixel circuit P1 can be characterized by the change of the control electrode potential of the driving module in the second pixel circuit P2. When the leakage paths of the first pixel circuit P1 and the second pixel circuit P2 are the same, it can be equivalent to the first pixel circuit P1 and the second pixel circuit P2 having the same impedance in the leakage paths, so that the leakage rate of the control electrode potential of the driving module is proportional to the written data voltage. When different data voltages are written to the control electrode of the driving module in the first pixel circuit P1 and the control electrode of the driving module in the second pixel circuit P2, the leakage amount of the control electrode of the driving module in the first pixel circuit P1 is proportional to the leakage amount of the control electrode of the driving module in the second pixel circuit P2, that is, the change amount of the control electrode potential is proportional.Then, the change amount of the control electrode potential of the driving module in the first pixel circuit P1 can be determined according to the change amount of the control electrode potential of the driving module in the second pixel circuit P2.

[0042] In addition, when the driving module in the first pixel circuit P1 forms a driving current according to the potential of the control electrode and the potential of the first electrode, the driving current formed by the driving module is positively correlated with the difference between the potential of the control electrode and the potential of the first electrode of the driving module. Exemplarily, when the driving module is a driving transistor, the gate of the driving transistor is the control electrode of the driving module, and the source of the driving transistor is the first electrode of the driving module, then the driving current formed by the driving transistor is Where Ids is the driving current, μ is the carrier mobility of the driving transistor, is the width-to-length ratio of the driving transistor, V gs is the gate-source voltage difference of the driving transistor, V th is the threshold voltage of the driving transistor. When the first pole potential of the driving module is a power signal, the driving current formed by the driving module is positively correlated with the difference between the control pole potential of the driving module and the power signal. In the present application, the non-display area 120 also includes a sensing unit 121 and an adjusting unit 122. The sensing unit 121 senses the change in the control pole potential of the driving module in the second pixel circuit P2, which can characterize the change in the control pole potential of the driving module in the first pixel circuit P1. And transmit it to the adjusting unit 122. The adjusting unit 122 adjusts the power signal of the first pixel circuit P1 according to the change in the control pole potential of the driving module in the second pixel circuit P2, which is equivalent to adjusting the power signal of the first pixel circuit P1 according to the change in the control pole potential of the driving module in the first pixel circuit P1, so that the voltage difference between the control pole potential and the first pole potential of the driving module in the first pixel circuit P1 can be controlled to remain unchanged, and then the driving current formed by the driving module can be controlled to remain unchanged. When the first pixel circuit P1 drives the first light-emitting unit 111 to emit light, the light-emitting stability of the first light-emitting unit 111 can be improved, thereby improving the flickering phenomenon of the display panel.

[0043] Moreover, during the adjustment process, the normal operation of the first pixel circuit P1 can be guaranteed, so that the display area 110 can emit light normally. At the same time, the change of the control electrode potential of the driving module in the first pixel circuit P1 can be sensed in real time in the non-display area 120. Not only can the voltage difference between the control potential and the first electrode potential of the driving module be kept unchanged at all times, but also the structural setting of the display area 110 is avoided, which is conducive to simplifying the design of the display panel.

[0044] The technical solution of this embodiment is to set a second pixel circuit in the non-display area, and the second pixel circuit has the same leakage path as the first pixel circuit, so that the change of the control electrode potential of the driving module in the second pixel circuit can represent the change of the control electrode potential of the driving module in the first pixel circuit. The change of the control electrode potential of the driving module in the second pixel circuit is sensed by the sensing unit to represent the change of the control electrode potential of the driving module in the first pixel circuit. And the power supply signal in the first pixel circuit is adjusted by the regulating unit according to the change of the control electrode potential of the driving module in the second pixel circuit, so that the voltage difference between the control electrode potential and the first electrode potential of the driving module in the first pixel circuit can be controlled to be unchanged, and then the driving current formed by the driving module can be controlled to be unchanged. When the first pixel circuit drives the first light-emitting unit to emit light, the light-emitting stability of the first light-emitting unit can be improved, thereby improving the flickering phenomenon of the display panel. Moreover, during the adjustment process, the normal operation of the first pixel circuit can be guaranteed, so that the display area can emit light normally, and at the same time, the change of the control electrode potential of the driving module in the first pixel circuit can be sensed in real time in the non-display area, which can not only keep the voltage difference between the control potential of the driving module and the first electrode potential unchanged, but also avoid affecting the structural setting of the display area, which is conducive to simplifying the design of the display panel.

[0045] On the basis of the above technical solution, the first pixel circuit and the second pixel circuit have the same circuit topology structure; the first pixel circuit and the second pixel circuit have the same working mode.

[0046] Specifically, when the change in the control electrode potential of the driving module in the first pixel circuit is characterized by the change in the control electrode potential of the driving module in the second pixel circuit, the circuit topology of the first pixel circuit can be further set to be the same as the circuit topology of the second pixel circuit, and the first pixel circuit and the second pixel circuit work in the same way, which can improve the consistency of the first pixel circuit and the second pixel circuit, and thus reduce the influence of the pixel circuit structure itself on the control electrode potential of the driving module, and improve the accuracy of the control electrode potential change of the driving module in the second pixel circuit for characterizing the control electrode potential change of the driving module in the first pixel circuit. Wherein, when the circuit topology of the first pixel circuit and the second pixel circuit are the same, the first pixel circuit and the second pixel circuit have the same elements, and the connection relationship between the elements is the same. Exemplarily, when the driving module of the first pixel circuit includes a first driving transistor, and the first pixel circuit also includes a switch module, and the switch module includes a switch transistor, the first pixel circuit can constitute a conventional 2T1C structure, at this time, the driving module of the second pixel circuit can be set to include a second driving transistor, and the second pixel circuit also includes a switch module, and the switch module also includes a switch transistor, which is used to constitute a conventional 2T1C structure. Alternatively, when the driving module of the first pixel circuit includes a first driving transistor, and the first pixel circuit also includes a switching module, and the switching module includes 6 switching transistors, the first pixel circuit can constitute a conventional 7T1C structure. At this time, the driving module of the second pixel circuit can be set to include a second driving transistor, and the second pixel circuit also includes a switching module, and the switching module also includes 6 switching transistors, which are used to constitute a conventional 7T1C structure.

[0047] When the working modes of the first pixel circuit and the second pixel circuit are the same, the first pixel circuit and the second pixel circuit have the same working process. Exemplarily, when the working process of the first pixel circuit includes a data writing stage and a light emitting stage, a data voltage can be written to the control electrode of the driving module in the first pixel circuit in the data writing stage, and the driving module in the first pixel circuit forms a driving current according to the data voltage and the first electrode potential in the light emitting stage. The working process of the second pixel circuit also includes a data writing stage and a light emitting stage, and a data voltage is also written to the control electrode of the driving module in the second pixel circuit in the data writing stage, and the driving module in the second pixel circuit forms a driving current according to the data voltage and the first electrode potential in the light emitting stage. Alternatively, when the working process of the first pixel circuit includes an initialization stage, a data writing stage and a light emitting stage, the control electrode of the driving module in the first pixel circuit can be initialized in the initialization stage, the data voltage can be written to the control electrode of the driving module in the first pixel circuit in the data writing stage, and the driving module in the first pixel circuit forms a driving current according to the data voltage and the first electrode potential in the light emitting stage. The working process of the second pixel circuit also includes an initialization stage, a data writing stage and a light-emitting stage. Similarly, in the initialization stage, the control electrode of the driving module in the second pixel circuit can be initialized. In the data writing stage, the data voltage can be written to the control electrode of the driving module in the second pixel circuit. In the light-emitting stage, the driving module in the second pixel circuit forms a driving current according to the data voltage and the first electrode potential.

[0048] Figure 3 FIG. 1 is a schematic diagram of another display panel structure provided by an embodiment of the present invention. Figure 3 As shown, the display area 110 also includes a first data line 112, and the non-display area 120 also includes a second data signal line 123; the first data line 112 is connected to the first pixel circuit P1, and the second data signal line 123 is connected to the second pixel circuit P2, and the first data signal line 112 is used to provide the first data signal to the first pixel circuit P1 during the data writing stage; the second data signal line 123 is used to provide the second data signal to the second pixel circuit P2 during the data writing stage.

[0049] Specifically, Figure 3As shown, the display area 110 may include a plurality of first data lines 112, each of which may be connected to a column of first pixel circuits P1, and used to provide a first data signal for a column of first pixel circuits P1. The non-display area 120 is also provided with a second data line 123, and the second data line 123 is connected to the second pixel circuit P2, and used to provide a second data signal for the second pixel circuit P2. By separately providing the second data line 123 in the non-display area 120 to provide the second pixel circuit P2 with the second data signal, the second data signal can be set as needed to avoid mutual influence between the first display area 110 and the second display area 120.

[0050] Figure 4 FIG. 1 is a schematic diagram of another display panel structure provided by an embodiment of the present invention. Figure 4 As shown, the sensing unit 121 includes a sensing signal line 1211, which is connected to the control electrode of the driving module in the second pixel circuit P2, and the sensing signal line 1211 is used to sense the control electrode potential of the driving module in the second pixel circuit P2 at the starting point of the light-emitting stage and during the light-emitting stage; the adjustment unit 122 is used to adjust the power signal of the first pixel circuit P1 according to the change in the control electrode potential; wherein the change in the control electrode potential is the difference between the potential of the control electrode of the driving module at the starting point of the light-emitting stage and the potential of the control electrode of the driving module during the light-emitting stage.

[0051] Specifically, Figure 5 FIG. 1 is a schematic diagram of a first pixel circuit provided by an embodiment of the present invention. Figure 5 As shown, the driving module in the second pixel circuit P2 may include a driving transistor Tdr, the gate of the driving transistor Tdr serves as the control electrode of the driving module, and the sensing signal line 1211 is connected to the gate of the driving transistor Tdr. In addition, the second pixel circuit P2 also includes a first switching transistor T1 and a second switching transistor T2, the first electrode of the first switching transistor T1 is connected to the second data line 123, the second electrode of the first switching transistor T1 is connected to the first electrode of the driving transistor Tdr, the gate of the first switching transistor T1 and the gate of the second switching transistor T2 are connected to the scanning signal line S1, the first electrode of the second switching transistor T2 is connected to the second electrode of the driving transistor Tdr, and the second electrode of the second switching transistor T2 is connected to the gate of the driving transistor Tdr. The working process of the second pixel circuit P2 is the same as Figure 1The working process of the pixel driving circuit of the prior art provided is similar and will not be repeated here. Among them, in the data writing stage of the second pixel circuit P2, the second data signal provided by the second data line 123 is written into the gate of the driving transistor Tdr through the first switch transistor T1, the driving transistor Tdr and the second switch transistor T2 to realize the writing of the data signal. In the light-emitting stage, the driving transistor Tdr forms a driving current according to the data signal written into the gate and the power supply signal of the first pole, and drives the first light-emitting unit 111 to emit light. At the moment when the data writing stage enters the light-emitting stage, that is, the starting point of the light-emitting stage, the scanning signal provided by the scanning signal line S1 has a jump process. At this time, the sensing signal line 1211 can sense the gate potential of the current driving transistor Tdr. At this time, the gate potential of the driving transistor Tdr is not leaking, which serves as the initial gate potential of the driving transistor Tdr. During the light-emitting stage, the gate of the driving transistor Tdr has a leakage path, and the gate potential of the driving transistor Tdr will change. At this time, the gate potential of the driving transistor Tdr can be sensed again through the sensing signal line 1211 at any time during the light-emitting stage, so that the change amount of the gate potential of the driving transistor Tdr during the two sensing periods can be determined, that is, the difference in the gate potential of the driving transistor Tdr. Then the change amount of the gate potential of the driving transistor Tdr is transmitted to the adjustment unit 122, and the adjustment unit 122 adjusts the power supply signal according to the change amount of the gate potential of the driving transistor Tdr, so that the first electrode potential of the driving transistor Tdr changes according to the change amount of the gate potential, so that the voltage difference between the gate potential and the first electrode potential of the driving transistor Tdr can be controlled to remain unchanged, and then the driving current formed by the gate potential and the first electrode potential of the driving transistor Tdr can be controlled to remain unchanged. When the first pixel circuit P1 drives the first light-emitting unit 111 to emit light, the light-emitting stability of the first light-emitting unit 111 can be improved, thereby improving the flickering phenomenon of the display panel.

[0052] Exemplarily, the driving current formed by the driving module in the first pixel circuit is positively correlated with the voltage difference between the control electrode and the first electrode of the driving module. After determining the change in the control electrode potential, the power supply signal of the first pixel circuit can be adjusted according to the change in the control electrode potential, so that the change in the power supply signal is equal to the change in the control electrode potential, so that the change in the voltage difference between the adjusted power supply signal and the changed control electrode potential can be equal to the change in the control electrode potential, and then the voltage difference between the power supply signal and the control electrode potential is adjusted according to the change in the voltage difference, so that the voltage difference between the adjusted power supply signal and the changed control electrode potential remains unchanged, and then the driving current formed by the driving module can be controlled to remain unchanged. Among them, the change in the power supply signal is the difference between the adjusted power supply signal and the power supply signal before adjustment. When adjusting the power supply signal, it can be adjusted by the driver chip of the display panel.

[0053] Based on the above technical solutions, continue to refer to Figure 4 and Figure 5 The display area also includes a first light-emitting unit 111, a first power signal line VDD and a second power signal line VSS; the first power signal line VDD is connected to the first electrode of the driving module in the first pixel circuit P1, the first end of the first light-emitting unit 111 is connected to the second electrode of the driving module in the first pixel circuit P1, and the second end of the first light-emitting unit 111 is connected to the second power signal line VSS; the adjustment unit 122 is used to adjust the first power signal provided by the first power signal line VDD according to the change in the control electrode potential.

[0054] Specifically, the first power signal line VDD may be directly connected to the first electrode of the driving module in the first pixel circuit P1, or may be indirectly connected. Similarly, the first end of the first light-emitting unit 111 may be directly connected to the second electrode of the driving module in the first pixel circuit P1, or may be indirectly connected. Exemplarily, when the first pixel circuit P1 is 2T1C and the driving module includes a driving transistor Tdr, the first electrode of the driving transistor Tdr may be the first electrode of the driving module, and the second electrode of the driving transistor Tdr may be the second electrode of the driving module. The first electrode of the driving transistor Tdr is directly connected to the first power signal line VDD, the first end of the first light-emitting unit 111 is connected to the second electrode of the driving transistor Tdr, and the second end of the first light-emitting unit 111 is connected to the second power signal line VSS. Wherein, when the first light-emitting unit 111 is a light-emitting device, the first end of the first light-emitting unit 111 may be the anode of the light-emitting device, and the second end of the first light-emitting unit 111 may be the cathode of the light-emitting device. Alternatively, when the first pixel circuit P1 is 7T1C and the driving module includes a driving transistor Tdr, the first electrode of the driving transistor Tdr may be the first electrode of the driving module, and the second electrode of the driving transistor Tdr may be the second electrode of the driving module. The first electrode of the driving transistor Tdr is connected to the first power signal line VDD through the first light-emitting control transistor, the first end of the first light-emitting unit 111 is connected to the second electrode of the driving transistor Tdr through the second light-emitting control transistor, and the second end of the first light-emitting unit 111 is connected to the second power signal line VSS. When the driving transistor Tdr forms a driving current, the voltage difference between the gate potential of the driving transistor Tdr and the first electrode potential is positively correlated with the driving current. When the gate potential of the driving transistor Tdr changes, the regulating unit 122 regulates the first power signal provided by the first power signal line VDD according to the gate potential change amount of the driving transistor Tdr, so that the first electrode potential of the driving transistor Tdr changes according to the gate potential change amount, thereby controlling the voltage difference between the gate potential of the driving transistor Tdr and the first electrode potential to remain unchanged, and further controlling the driving current formed by the driving transistor Tdr according to the gate potential and the first electrode potential to remain unchanged. When the first pixel circuit P1 drives the first light emitting unit 111 to emit light, the light emission stability of the first light emitting unit 111 can be improved, thereby improving the flicker phenomenon of the display panel.

[0055] For example, Figure 6 A timing diagram of different signals provided by an embodiment of the present invention. Among them, s1 is a timing diagram of a scan signal provided by the scan signal line S1, gate is a timing diagram of the gate potential of the driving transistor Tdr, vdd is a timing diagram of a first power signal provided by the first power signal line VDD, and vss is a timing diagram of a second power signal provided by the second power signal line VSS. Figure 5 and Figure 6As shown, the first switch transistor T1 and the second switch transistor T2 are P-type transistors. In the data writing stage t1, the scanning signal is at a low level, and the first switch transistor T1 and the second switch transistor T2 are controlled to be turned on. The second data signal provided by the second data line 123 is written into the gate of the driving transistor Tdr through the first switch transistor T1, the driving transistor Tdr and the second switch transistor T2, so as to realize the writing of the data signal. At the starting point of the light-emitting stage, the scanning signal jumps from a low level to a high level, and the sensing signal line 1211 senses the initial gate potential of the current driving transistor Tdr. During the light-emitting stage t2, due to the phenomenon of leakage current, the gate potential of the driving transistor Tdr gradually decreases, and the sensing signal line 1211 senses the gate potential of the driving transistor Tdr again, so that the change amount of the gate potential of the driving transistor Tdr during the two sensing periods can be determined. Then, according to the change amount of the gate potential of the driving transistor Tdr, the first power supply signal is synchronously and equally adjusted, so that the voltage difference between the gate potential of the driving transistor Tdr and the first pole potential can be kept unchanged, and then the driving current formed by the gate potential and the first pole potential of the driving transistor Tdr can be controlled to remain unchanged.

[0056] In addition, the sensing signal line 1211 can continuously sense the gate potential of the driving transistor Tdr during the light-emitting stage, so that the change in the gate potential of the driving transistor Tdr at any time during the light-emitting stage can be determined, and the first power supply signal can be synchronously adjusted according to the change in the gate potential of the driving transistor Tdr at any time during the light-emitting stage, so that the voltage difference between the gate potential and the first pole potential of the driving transistor Tdr can remain unchanged throughout the light-emitting stage, thereby further improving the stability of the driving current formed by the driving transistor Tdr.

[0057] Preferably, the regulating unit 122 is further used to regulate the second power signal provided by the second power signal line VSS according to the change in the control electrode potential, and the difference between the first power signal and the second power signal remains unchanged.

[0058] Specifically, the driving current of the driving module is also related to the voltage difference between the first pole potential and the second pole potential of the driving module. Exemplarily, when the driving module includes a driving transistor, the driving current formed by the driving transistor is also related to the voltage difference between the first pole potential and the second pole potential of the driving transistor. When the regulating unit 122 adjusts the first power supply signal according to the change in the control pole potential, the regulating unit 122 can also adjust the second power supply signal according to the change in the control pole potential, so that the difference between the first power supply signal and the second power supply signal remains unchanged, thereby making the voltage difference between the first pole potential and the second pole potential of the driving module unchanged, thereby reducing the influence of the difference change of the first power supply signal and the second power supply signal on the driving current, further improving the light-emitting stability of the first light-emitting unit 111, and improving the flickering phenomenon of the display panel. Exemplarily, continue to refer to Figure 6 When the regulating unit 122 adjusts the first power signal equally according to the change in the control electrode potential, the second power signal is synchronously and equally adjusted so that the difference between the first power signal and the second power signal remains unchanged, thereby further improving the stability of the driving current, that is, improving the light-emitting stability of the first light-emitting unit 111.

[0059] Figure 7 FIG. 1 is a schematic diagram of another display panel structure provided by an embodiment of the present invention. Figure 7 As shown, the display area 110 also includes a first light-emitting unit 111, and the non-display area 120 also includes a second light-emitting unit 124. The first light-emitting unit 111 is connected to the first pixel circuit P1, and the second light-emitting unit 124 is connected to the second pixel circuit P2. The first light-emitting unit 111 and the second light-emitting unit 124 have the same structure.

[0060] Specifically, the first light-emitting unit 111 is connected to the first pixel circuit P1, and the first light-emitting unit 111 has a parasitic capacitance. When the first pixel circuit P1 drives the first light-emitting unit 111 to emit light according to the driving current, the parasitic capacitance of the first light-emitting unit 111 affects the second electrode potential of the driving module, thereby affecting the voltage difference between the first electrode potential and the second electrode potential of the driving module. By arranging the second light-emitting unit 124 in the non-display area 120, and the structure of the second light-emitting unit 124 is the same as that of the first light-emitting unit 111, the parasitic capacitance of the second light-emitting unit 124 can be made the same as the parasitic capacitance of the first light-emitting unit 111, so that when the second pixel circuit P2 drives the second light-emitting unit 124 according to the driving current, the consistency of the second pixel circuit P2 simulating the first pixel circuit P1 can be improved, and then the accuracy of adjusting the power supply signal of the first pixel circuit P1 according to the change of the control electrode potential of the second pixel circuit P2 can be improved.

[0061] It should be noted that the non-display area 120 may also include a shielding layer ( Figure 7The shielding layer is not shown in the figure and is used to cover the light emitting side of the second light emitting unit 124. When the second pixel circuit P2 drives the second light emitting unit 124 to emit light, the shielding layer can shield the light of the second light emitting unit 124 to prevent light leakage in the non-display area 120 of the display panel.

[0062] Figure 8 FIG. 1 is a schematic diagram of another display panel structure provided by an embodiment of the present invention. Figure 8 As shown, the non-display area 120 is provided with at least two second pixel circuits P2 and at least two sensing units 121; the sensing unit 121 is correspondingly connected to the second pixel circuit P2, the sensing unit 121 is used to sense the change of the control electrode potential of the driving module in the correspondingly connected second pixel circuit P2, and the adjustment unit 122 is used to adjust the power signal of the first pixel circuit P1 according to the change of the control electrode potential provided by at least one sensing unit 121.

[0063] Specifically, Figure 8 It is exemplarily shown that two second pixel circuits P2 and two sensing units 121 are provided in the non-display area 120, and each sensing unit 121 is connected to a second pixel circuit P2, and is used to sense the change of the control electrode potential of the driving module in each second pixel circuit P2. The regulating unit 122 is connected to at least two sensing units 121 at the same time, so that the power signal of the first pixel circuit P1 can be adjusted according to the change of the control electrode potential provided by at least one sensing unit 121. When there is an abnormality in the sensing unit 121 and the corresponding second pixel circuit P2, the regulating unit 122 can adjust the power signal of the first pixel circuit P1 according to the normal sensing unit 121 and the change of the control electrode potential of the driving module in the second pixel circuit P2, so as to ensure the reliability of the regulating unit 122 in obtaining the change of the control electrode potential of the driving module in the second pixel circuit P1, and further improve the reliability on the basis of improving the stability of the driving current.

[0064] Preferably, the non-display area 120 is disposed on one side of the display area 110 ; the non-display area 120 is provided with two second pixel circuits P2 , and the two second pixel circuits P2 are symmetrically arranged about a midline in a direction X from the display area 110 to the non-display area 120 .

[0065] Continue to refer Figure 8 The non-display area 120 can be arranged on one side of the column direction X where the first pixel circuits P1 are arranged in the display area 110. When the non-display area 120 is provided with two second pixel circuits P2, the two second pixel circuits P2 are symmetrically arranged along the center line of the column direction X of the display area 110, which can improve the symmetry of the display panel and is conducive to simplifying the wiring arrangement of the display panel.

[0066] It should be noted that in other embodiments, the non-display area 120 can also be arranged on the other side of the column direction X of the first pixel circuit P1 arranged in the display area 110, or on any side of the row direction of the first pixel circuit P1 arranged in the display area 110, which is not limited here.

[0067] An embodiment of the present invention further provides a method for driving a display panel, which is used to drive the display panel provided by any embodiment of the present invention. Fig. 9 FIG. 1 is a flow chart of a method for driving a display panel provided by an embodiment of the present invention. Fig. 9 As shown, the driving method includes:

[0068] S101, a sensing unit senses a change in a control electrode potential of a driving module in a second pixel circuit;

[0069] S102 , the regulating unit regulates the power signal of the first pixel circuit according to the change of the control electrode potential.

[0070] The technical solution of this embodiment senses the change of the control electrode potential of the driving module in the second pixel circuit by the sensing unit, which is used to characterize the change of the control electrode potential of the driving module in the first pixel circuit. The power supply signal in the first pixel circuit is adjusted by the regulating unit according to the change of the control electrode potential of the driving module in the second pixel circuit, so that the voltage difference between the control electrode potential and the first electrode potential of the driving module in the first pixel circuit can be controlled to remain unchanged, and then the driving current formed by the driving module can be controlled to remain unchanged. When the first pixel circuit drives the first light-emitting unit to emit light, the light-emitting stability of the first light-emitting unit can be improved, thereby improving the flickering phenomenon of the display panel. Moreover, during the adjustment process, the normal operation of the first pixel circuit can be guaranteed, so that the display area can emit light normally, and at the same time, the change of the control electrode potential of the driving module in the first pixel circuit can be sensed in real time in the non-display area, which can not only keep the voltage difference between the control potential of the driving module and the first electrode potential unchanged, but also avoid affecting the structural setting of the display area, which is conducive to simplifying the design of the display panel.

[0071] Optionally, the first pixel circuit and the second pixel circuit have the same structure.

[0072] Optionally, the display area also includes a first data line, and the non-display area also includes a second data signal line; the first data line is connected to the first pixel circuit, and the second data signal line is connected to the second pixel circuit, and the first data signal line is used to provide the first data signal to the first pixel circuit during the data writing stage; the second data signal line is used to provide the second data signal to the second pixel circuit during the data writing stage.

[0073] On the basis of the above technical solution, when the sensing unit includes a sensing signal line, and the sensing signal line is connected to the control electrode of the driving module in the second pixel circuit, the sensing unit senses the control electrode potential of the driving module in the second pixel circuit, including:

[0074] The sensing signal line senses the control electrode potential of the driving module in the second pixel circuit at the starting point of the light emitting phase and during the light emitting phase respectively;

[0075] The regulating unit regulates the power supply signal of the first pixel circuit according to the change of the control electrode potential, including:

[0076] The regulating unit regulates the power signal of the first pixel circuit according to the change in the control electrode potential; wherein the change in the control electrode potential is the difference between the potential of the control electrode of the driving module at the starting point of the light-emitting stage and the potential of the control electrode of the driving module during the light-emitting stage.

[0077] Optionally, the display area further includes a first light-emitting unit, a first power signal line, and a second power signal line; the first power signal line is connected to a first electrode of a driving module in the first pixel circuit, a first end of the first light-emitting unit is connected to a second electrode of the driving module in the first pixel circuit, and a second end of the first light-emitting unit is connected to the second power signal line; the regulating unit is used to regulate the first power signal provided by the first power signal line according to the change amount of the control electrode potential;

[0078] Preferably, the regulating unit is further used to regulate the second power signal provided by the second power signal line according to the change amount of the control electrode potential, and the difference between the first power signal and the second power signal remains unchanged.

[0079] Optionally, the display area further includes a first light-emitting unit, and the non-display area further includes a second light-emitting unit, the first light-emitting unit is connected to the first pixel circuit, and the second light-emitting unit is connected to the second pixel circuit; the first light-emitting unit and the second light-emitting unit have the same structure.

[0080] Optionally, the non-display area is provided with at least two second pixel circuits and at least two sensing units; the sensing units are connected to the second pixel circuits correspondingly, the sensing units are used to sense the change of the control electrode potential of the driving module in the correspondingly connected second pixel circuit, and the regulating unit is used to regulate the power supply signal of the first pixel circuit according to the change of the control electrode potential provided by at least one sensing unit;

[0081] Preferably, the non-display area is arranged at one side of the display area; the non-display area is provided with two second pixel circuits, and the two second pixel circuits are symmetrically arranged about a midline pointing from the display area to the non-display area.

[0082] An embodiment of the present invention further provides a display device. Fig.10 FIG. 1 is a schematic diagram of a display device provided by an embodiment of the present invention. Fig.10 As shown, the display device 10 includes a display panel 100 provided by any embodiment of the present invention.

[0083] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A display panel, characterized in that: comprising a display area and a non-display area, wherein the non-display area at least partially surrounds the display area; The display area is provided with a first pixel circuit, and the non-display area is provided with a second pixel circuit, a sensing unit and an adjusting unit. The leakage paths of the control electrodes of the driving modules in the first pixel circuit and the second pixel circuit are the same; the display area also includes a first light-emitting unit, a first power signal line and a second power signal line; the first power signal line is connected to the first electrode of the driving module in the first pixel circuit, the first end of the first light-emitting unit is connected to the second electrode of the driving module in the first pixel circuit, and the second end of the first light-emitting unit is connected to the second power signal line; the sensing unit is connected to the second pixel circuit, and the sensing unit is used to sense the change in the control electrode potential of the driving module in the second pixel circuit; the adjusting unit is connected to the sensing unit, and the adjusting unit is used to adjust the first power signal provided by the first power signal line according to the change in the control electrode potential.

2. The display panel according to claim 1, characterized in that: The first pixel circuit and the second pixel circuit have the same circuit topology structure; the first pixel circuit and the second pixel circuit work in the same manner.

3. The display panel according to claim 1, characterized in that: The display area further includes a first data line, and the non-display area further includes a second data signal line; The first data line is connected to the first pixel circuit, and the second data signal line is connected to the second pixel circuit. The first data line is used to provide a first data signal to the first pixel circuit during a data writing phase; the second data signal line is used to provide a second data signal to the second pixel circuit during the data writing phase.

4. The display panel according to any one of claims 1 to 3, characterized in that: The sensing unit includes a sensing signal line, which is connected to the control electrode of the driving module in the second pixel circuit, and the sensing signal line is used to sense the control electrode potential of the driving module in the second pixel circuit at the starting point of the light-emitting stage and during the light-emitting stage respectively; the adjustment unit is used to adjust the power signal of the first pixel circuit according to the change in the control electrode potential; wherein the change in the control electrode potential is the difference between the potential of the control electrode of the driving module at the starting point of the light-emitting stage and the potential of the control electrode of the driving module during the light-emitting stage.

5. The display panel according to claim 4, characterized in that: The regulating unit is further used for regulating the second power signal provided by the second power signal line according to the change amount of the control electrode potential, and the difference between the first power signal and the second power signal remains unchanged.

6. The display panel according to claim 1, characterized in that: The display area further includes a first light-emitting unit, and the non-display area further includes a second light-emitting unit. The first light-emitting unit is connected to the first pixel circuit, and the second light-emitting unit is connected to the second pixel circuit. The first light-emitting unit and the second light-emitting unit have the same structure.

7. The display panel according to claim 1, characterized in that: The non-display area is provided with at least two of the second pixel circuits and at least two of the sensing units; The sensing unit is connected correspondingly to the second pixel circuit, and is used to sense the change in the control electrode potential of the driving module in the correspondingly connected second pixel circuit. The regulating unit is used to adjust the power signal of the first pixel circuit according to the change in the control electrode potential provided by at least one of the sensing units.

8. The display panel according to claim 7, characterized in that: The non-display area is arranged at one side of the display area; the non-display area is provided with two second pixel circuits, and the two second pixel circuits are symmetrically arranged about a midline pointing from the display area to the non-display area.

9. A method for driving a display panel, used for driving the display panel according to any one of claims 1 to 8; characterized in that: include: The sensing unit senses a change in the control electrode potential of the driving module in the second pixel circuit; The regulating unit regulates the power supply signal of the first pixel circuit according to the change of the control electrode potential.

10. The method for driving a display panel according to claim 9, wherein the sensing unit comprises a sensing signal line, and the sensing signal line is connected to a control electrode of a driving module in the second pixel circuit; The sensing unit senses the control electrode potential of the driving module in the second pixel circuit, including: The sensing signal line senses the control electrode potential of the driving module in the second pixel circuit at the starting point of the light emitting phase and during the light emitting phase respectively; The regulating unit regulates the power supply signal of the first pixel circuit according to the change of the control electrode potential, including: The regulating unit regulates the power signal of the first pixel circuit according to the change in the control electrode potential; wherein the change in the control electrode potential is the difference between the potential of the control electrode of the driving module at the starting point of the light-emitting stage and the potential of the control electrode of the driving module during the light-emitting stage.

11. A display device, characterized in that: A display panel comprising any one of claims 1 to 8.

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