Pixel circuit and display panel

Abstract

The invention relates to a pixel circuit and a display panel. The pixel circuit comprises a driving transistor; the first end of the first light-emitting control module is connected with the first pole of the driving transistor, the second end of the first light-emitting control module is connected with the anode of the light-emitting element, and the control end of the first light-emitting control module is used for receiving a light-emitting control signal; the first end of the voltage stabilizing module is connected with the anode of the light-emitting element, the second end of the voltage stabilizing module is used for receiving the first voltage signal, the first control end of the voltage stabilizing module is used for receiving the first control signal, and the second control end of the voltage stabilizing module is used for receiving the second voltage signal; in the light-emitting stage of the pixel circuit, the first light-emitting control module responds to the light-emitting control signal to be switched on so as to control the light-emitting element to emit light. The voltage stabilizing module responds to the first control signal, the second voltage signal is conducted, and the potential of the anode of the light-emitting element is stabilized according to the first voltage signal. According to the pixel circuit, the display effect of the display panel can be improved.

Description

Technical Field

[0001] This application relates to the field of display technologies, and particularly to a pixel circuit and a display panel. Background Art

[0002] As an important part of the information industry, display technologies have played an important role in the development of information technologies. With the development of display technologies, display panels such as organic light-emitting diode display panels have been widely used.

[0003] Currently, the display performance of display panels is poor. Summary of the Invention

[0004] Based on this, it is necessary to provide a pixel circuit and a display panel, aiming to improve the display performance of the display panel.

[0005] In a first aspect, an embodiment of the present application provides a pixel circuit, including:

[0006] A driving transistor;

[0007] A first light-emitting control module, a first end of the first light-emitting control module is connected to a first pole of the driving transistor, a second end of the first light-emitting control module is connected to an anode of a light-emitting element, and a control end of the first light-emitting control module is configured to receive a light-emitting control signal;

[0008] A voltage stabilizing module, a first end of the voltage stabilizing module is connected to the anode of the light-emitting element, a second end of the voltage stabilizing module is configured to receive a first voltage signal, a first control end of the voltage stabilizing module is configured to receive a first control signal, and a second control end of the voltage stabilizing module is configured to receive a second voltage signal;

[0009] Wherein, in a light-emitting stage of the pixel circuit, the first light-emitting control module is turned on in response to the light-emitting control signal to control the light-emitting element to emit light; the voltage stabilizing module is turned on in response to the first control signal and the second voltage signal, and stabilizes the potential of the anode of the light-emitting element according to the first voltage signal.

[0010] In a second aspect, an embodiment of the present application further provides a display panel, and the display panel includes the pixel circuit provided in the first aspect.

[0011] The pixel circuit provided by the embodiment of the present application includes a driving transistor, a first light-emitting control module, and a voltage stabilizing module. The first end of the first light-emitting control module is connected to the first pole of the driving transistor, the second end of the first light-emitting control module is connected to the anode of the light-emitting element, and the control end of the first light-emitting control module is used to receive a light-emitting control signal. During the light-emitting stage of the pixel circuit, the first light-emitting control module can be turned on in response to the light-emitting control signal, so as to control the light-emitting element to emit light. The first end of the voltage stabilizing module is connected to the anode of the light-emitting element, the second end of the voltage stabilizing module is used to receive a first voltage signal, the first control end of the voltage stabilizing module is used to receive a first control signal, and the second control end of the voltage stabilizing module is used to receive a second voltage signal. During the light-emitting stage of the pixel circuit, the voltage stabilizing module is turned on in response to the first control signal and the second voltage signal. Furthermore, when the driving circuit in the pixel circuit changes, resulting in potential fluctuations at the anode of the light-emitting element, the voltage stabilizing module can stabilize the potential of the anode of the light-emitting element according to the first voltage signal, thereby avoiding the problem of flicker in the display panel and improving the display performance of the display panel. Description of the Drawings

[0012] Figure 1 Schematic diagram of the structure of a pixel circuit in the related art;

[0013] Figure 2 Schematic diagram of the structure of a pixel circuit provided by an embodiment of the present application;

[0014] Figure 3 Schematic diagram of the structure of another pixel circuit provided by an embodiment of the present application;

[0015] Figure 4 Schematic diagram of the structure of yet another pixel circuit provided by an embodiment of the present application;

[0016] Figure 5 Schematic diagram of the structure of yet another pixel circuit provided by an embodiment of the present application;

[0017] Figure 6 Schematic diagram of the structure of yet another pixel circuit provided by an embodiment of the present application;

[0018] Figure 7 Driving timing diagram of a pixel circuit provided by an embodiment of the present application;

[0019] Figure 8 Schematic diagram of the structure of yet another pixel circuit provided by an embodiment of the present application;

[0020] Figure 9 Schematic diagram of the structure of a display panel provided by an embodiment of the present application;

[0021] Figure 10 Schematic diagram of the structure of a display device provided by an embodiment of the present application. Detailed implementation mode

[0022] To facilitate the understanding of the present application, the present application will be described more comprehensively below with reference to the relevant drawings. Preferred embodiments of the present application are shown in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present application more thorough and comprehensive.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used in the specification of this application herein are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0024] When describing positional relationships, unless otherwise specified, when an element such as a layer, film, or substrate is referred to as being "on" another element, it can be directly on the other element or there can also be intermediate elements. Further, when a layer is referred to as being "under" another layer, it can be directly below or there can be one or more intermediate elements. It can also be understood that when a layer is referred to as being "between" two layers, it can be the only layer between the two layers or there can also be one or more intermediate elements.

[0025] In the case of using "including", "having", and "comprising" described herein, unless explicit limiting terms are used, such as "only", "consisting of", etc., another component can also be added. Unless otherwise mentioned, terms in the singular form can include the plural form and should not be understood as having a quantity of one.

[0026] It should be understood that although terms such as "first" and "second" can be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, without departing from the scope of the present application, the first element can be referred to as the second element, and similarly, the second element can be referred to as the first element.

[0027] It should also be understood that when interpreting an element, although not explicitly described, the element is interpreted as including an error range, and this error range should be within the acceptable deviation range of a specific value determined by those skilled in the art. For example, "about", "approximately", or "substantially" can mean within one or more standard deviations, which is not limited herein.

[0028] In addition, in the specification, the phrase "schematic diagram of planar distribution" refers to the accompanying drawing when observing the target part from above, and the phrase "schematic sectional view" refers to the accompanying drawing when observing the cross-section obtained by vertically cutting the target part from the side.

[0029] In addition, the accompanying drawings are not drawn to a scale of 1:1, and the relative sizes of the components are only drawn by way of example in the accompanying drawings and not necessarily to the actual scale.

[0030] As described in the background art section, there is a phenomenon that the display performance of the display panel in the related art is poor. The inventor found that the reason for the above phenomenon is that since the off states of the transistors in the pixel circuit are not ideal and there is a certain degree of leakage current, during the light emission control stage of the pixel circuit, the leakage current of the transistors in the pixel circuit will cause the anode potential of the light-emitting element to fluctuate, and further cause the brightness of the light-emitting element to fluctuate, resulting in the display panel flickering and affecting the display effect of the display panel.

[0031] Based on the above technical problems, the inventor's research found that the flickering of the display panel can be improved by keeping the anode potential of the light-emitting element stable during the light emission control stage. Based on this, the inventor further developed the technical solution of the embodiment of the present application. Specifically, the pixel circuit provided in the embodiment of the present application includes: a driving transistor; a light emission control module, a first end of the first light emission control module is connected to a first pole of the driving transistor, a second end of the first light emission control module is connected to the anode of the light-emitting element, and a control end of the first light emission control module is used to receive a light emission control signal; a voltage stabilizing module, a first end of the voltage stabilizing module is connected to the anode of the light-emitting element, a second end of the voltage stabilizing module is used to receive a first voltage signal, a first control end of the voltage stabilizing module is used to receive a first control signal, and a second control end of the voltage stabilizing module is used to receive a second voltage signal; wherein, during the light emission stage of the pixel circuit, the first light emission control module is turned on in response to the light emission control signal to control the light-emitting element to emit light; the voltage stabilizing module is turned on in response to the first control signal and the second voltage signal, and stabilizes the potential of the anode of the light-emitting element according to the first voltage signal. By adopting the above technical solution, by providing a voltage stabilizing module at the anode of the light-emitting element, during the light emission control stage, when the potential of the anode of the light-emitting element fluctuates, the voltage stabilizing module can stabilize the potential of the anode of the light-emitting element, thereby improving the flickering problem of the light-emitting element and improving the display performance.

[0032] The above is the core idea of the present application. Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the scope of protection of the present application.

[0033] Please refer to Figure 1 , Figure 1 which is a schematic structural diagram of a pixel circuit in the related art. The pixel circuit in Figure 1 is an 8T1C pixel circuit, including: a first transistor M1, the control terminal of the first transistor M1 is used to receive a light emission control signal EM, the first terminal of the first transistor M1 is electrically connected to a first power signal terminal PVDD, and the second terminal of the first transistor M1 is electrically connected to the first terminal of a driving transistor M3; a second transistor M2, the control terminal of the second transistor M2 is used to receive a first scan signal SP, the first terminal of the second transistor M2 is used to receive a data signal input Vdata, and the second terminal of the second transistor M2 is electrically connected to the first terminal of the driving transistor M3; a third transistor M4, the control terminal of the third transistor M4 is used to receive a second scan signal SN2, the first terminal of the third transistor M4 is electrically connected to the second terminal of the driving transistor M3, and the second terminal of the third transistor M4 is connected to the control terminal of the driving transistor M3; a fourth transistor M5, the control terminal of the fourth transistor M5 is used to receive a third scan signal SN1, the first terminal of the fourth transistor M5 is used to receive a first reset signal Vref1, and the second terminal of the fourth transistor M5 is connected to the control terminal of the driving transistor M3; a fifth transistor M6, the control terminal of the fifth transistor M6 is used to receive the light emission control signal EM, the first terminal of the fifth transistor M6 is electrically connected to the second terminal of the driving transistor M3, and the second terminal of the fifth transistor M6 is connected to the anode of a light emitting element D; a sixth transistor M7, the control terminal of the sixth transistor M7 is used to receive a fourth scan signal SP*, the first terminal of the sixth transistor M7 is used to receive a second reset signal Vref2, and the second terminal of the sixth transistor M7 is connected to the anode of the light emitting element D; a seventh transistor M8, the control terminal of the seventh transistor M8 is used to receive the fourth scan signal SP*, the first terminal of the seventh transistor M8 is used to receive a bias adjustment signal DVH, and the second terminal of the seventh transistor M8 is electrically connected to the first terminal of the driving transistor M3; a storage capacitor Cst, the first terminal of the storage capacitor Cst is electrically connected to the control terminal of the driving transistor M3, and the second terminal of the storage capacitor Cst is electrically connected to the first power signal terminal PVDD.

[0034] In the current 8T1C circuit, the light emission current Id is jointly determined by PVDD and Vdata. Since Id = K(PVDD - Vdata + |Vth| - |Vth|) 2 = K(PVDD - Vdata) 2 , and the off states of the transistors in the pixel circuit are not ideal. Due to process fluctuations or leakage current of the TFT transistors, current leakage occurs at the N4 node during the light emission stage, resulting in flickering at a certain frequency. Even under a constant gray scale, this situation will occur, and it is particularly obvious at low frequencies.

[0035] Based on the above technical problems, in an exemplary embodiment, the present application provides a pixel circuit, including: a driving transistor T0, a first light-emitting control module 11, and a voltage stabilizing module 12.

[0036] A first end of the first light-emitting control module 11 is connected to a first pole of the driving transistor T0, a second end of the first light-emitting control module 11 is connected to an anode of the light-emitting element D, and a control end of the first light-emitting control module 11 is configured to receive a light-emitting control signal Emit. A first end of the voltage stabilizing module 12 is connected to the anode of the light-emitting element D, a second end of the voltage stabilizing module 12 is configured to receive a first voltage signal U1, a first control end of the voltage stabilizing module 12 is configured to receive a first control signal S1, and a second control end of the voltage stabilizing module 12 is configured to receive a second voltage signal U2. Wherein, in a light-emitting stage of the pixel circuit, the first light-emitting control module 11 is turned on in response to the light-emitting control signal Emit to control the light-emitting element D to emit light; the voltage stabilizing module 12 is turned on in response to the first control signal S1 and the second voltage signal U2, and according to the first voltage signal U1, stabilizes the potential of the anode of the light-emitting element D.

[0037] It should be noted that Figure 2 Only a frame structure of the pixel circuit in the present application is shown. In some other embodiments of the present application, the frame structure of the pixel driving circuit 100 may also be embodied as others, and the present application does not specifically limit this.

[0038] In this embodiment, a second end of the driving transistor T0 is configured to receive a first power supply signal PVDD, a cathode of the light-emitting element is configured to receive a second power supply signal PVEE, the first power supply signal PVDD is at a high potential, the second power supply signal PVEE is at a low potential, and the first light-emitting control module 11 is configured to control whether the pixel circuit is turned on. If the first light-emitting control module 11 controls the pixel circuit to be turned on, the light-emitting element D emits light. If the first light-emitting control module 11 controls the pixel circuit to be turned off, the light-emitting element D does not emit light.

[0039] It can be understood that in the related art, due to process fluctuations or leakage of transistors in the pixel circuit, the light-emitting element D will flicker at a certain frequency during the light-emitting stage of the pixel circuit. In this embodiment, a voltage stabilizing module 12 is arranged at the anode of the light-emitting element D. During the light-emitting stage, when the potential of the anode of the light-emitting element D rises, the voltage stabilizing module 12 performs negative feedback to pull down the potential of the anode of the light-emitting element D. When the potential of the anode of the light-emitting element D drops, the voltage stabilizing module 12 performs negative feedback to compensate for the potential of the anode of the light-emitting element D and raise the potential of the anode of the light-emitting element D. In this way, the potential of the anode of the light-emitting element D is stabilized, thereby improving the flicker problem of the light-emitting element D and improving the display performance.

[0040] The pixel circuit provided by the embodiment of the present application includes a driving transistor, a first light-emitting control module, and a voltage stabilizing module. The first end of the first light-emitting control module is connected to the first pole of the driving transistor, the second end of the first light-emitting control module is connected to the anode of the light-emitting element, and the control end of the first light-emitting control module is used to receive a light-emitting control signal. In the light-emitting stage of the pixel circuit, the first light-emitting control module can be turned on in response to the light-emitting control signal, so as to control the light-emitting element to emit light. The first end of the voltage stabilizing module is connected to the anode of the light-emitting element, the second end of the voltage stabilizing module is used to receive a first voltage signal, the first control end of the voltage stabilizing module is used to receive a first control signal, and the second control end of the voltage stabilizing module is used to receive a second voltage signal. In the light-emitting stage of the pixel circuit, the voltage stabilizing module is turned on in response to the first control signal and the second voltage signal. Furthermore, when the driving circuit in the pixel circuit changes, resulting in potential fluctuations at the anode of the light-emitting element, the voltage stabilizing module can stabilize the potential of the anode of the light-emitting element according to the first voltage signal, thereby avoiding the problem of flicker in the display panel and improving the display performance of the display panel.

[0041] In an exemplary embodiment, please refer to Figure 3 , the voltage stabilizing module 12 includes: a potential regulating unit 121 and a control unit 122.

[0042] The first end of the potential regulating unit 121 is connected to the anode of the light-emitting element D, and the control end of the potential regulating unit 121 is used to receive the second voltage signal U2. The first end of the control unit 122 is connected to the second end of the potential regulating unit 121, the second end of the control unit 122 is used to receive the first voltage signal U1, and the control end of the control unit 122 is used to receive the first control signal. Wherein, in the light-emitting stage, the control unit 122 is turned on in response to the first control signal S1 to provide the first voltage signal U1 to the potential regulating unit 121, and the potential regulating unit 121 is turned on in response to the second voltage signal U2 to stabilize the potential of the anode of the light-emitting element D according to the first voltage signal U1.

[0043] In application, the control unit 122 is used to control the voltage stabilizing module 12 to be turned on in the light-emitting stage, that is, the control unit 122 controls whether the voltage stabilizing module 12 can work in the light-emitting stage and whether it can compensate the potential of the anode of the light-emitting element D. If the control unit 122 is turned on, then the voltage stabilizing module 12 works to compensate the potential of the anode of the light-emitting element D. If the control unit 122 is turned off, then the voltage stabilizing module 12 does not work and cannot compensate the potential of the anode of the light-emitting element D. When the control unit 122 is turned on, the first voltage signal U1 can be transmitted to the second end of the potential regulating unit 121 through the control unit 122. Furthermore, the potential regulating unit can compensate the potential of the anode of the light-emitting element D according to the first voltage signal U1 to stabilize the potential of the anode of the light-emitting element D.

[0044] In an exemplary embodiment, please refer to Figure 4 , the potential regulating unit 121 includes: a first switching transistor T1, a zener diode F, and a resistor R.

[0045] The first pole of the first switching transistor T1 is connected to the anode of the light-emitting element D, and the second pole of the first switching transistor T1 is connected to the first end of the control unit 122. The cathode of the zener diode F is connected to the gate of the first switching transistor T1, and the anode of the zener diode F is used to receive the second voltage signal U2. The first end of the resistor R is connected to the second pole of the first switching transistor T1, and the second end of the resistor R is connected to the gate of the first switching transistor T1.

[0046] In this embodiment, when the control unit 122 is turned on, the first voltage signal U1 can be transmitted to the second end of the potential regulating unit 121 through the control unit 122. Since the gate of the first switching transistor T1 receives the second voltage signal U2 through the zener diode F, the zener diode F can keep the gate potential of the first switching transistor T1 stable all the time. In one example, when the anode potential of the light-emitting element D drops, the gate-source voltage Ugs = (Ug - Us) of the first switching transistor T1 increases, which in turn causes the source current of the first switching transistor T1 to increase, thereby increasing the anode potential of the light-emitting element D and keeping the anode potential of the light-emitting element D stable. In one example, if the first switching transistor T1 is a P-type transistor, the second voltage signal U2 can be a low-level voltage signal. If the first switching transistor T1 is an N-type transistor, the second voltage signal U2 can be a high / level voltage signal. Wherein, if the first switching transistor T1 is a P-type transistor, the second power supply signal PVEE can be reused as the second voltage signal U2, that is, the anode of the zener diode F can be connected to the cathode of the light-emitting element D.

[0047] Wherein, both ends of the resistor R are respectively connected to the gate and the drain of the first switching transistor T1. The resistor R can adjust the quiescent operating point and can also be used as a current-limiting resistor to protect the first switching transistor T1. Through the resistor R, the conditions for the first switching transistor T1 to be in the working amplification state can be calculated, that is, the gate current, source current, and drain current of the first switching transistor T1 can be calculated, and saturation distortion or cut-off distortion can be avoided.

[0048] In an exemplary embodiment, please continue to refer to Figure 4 , the control unit 122 includes: a second switching transistor T2. The first pole of the second switching transistor T2 is connected to the second end of the potential regulating unit 121. The second pole of the second switching transistor T2 is used to receive the first voltage signal U1, and the gate of the second switching transistor T2 is used to receive the first control signal S1.

[0049] In the application, in order to ensure the consistency of the conduction and turn-off of the control unit 122 and the first light-emitting control module 11, the light-emitting control signal Emit can be multiplexed as the first control signal S1. During the light-emitting stage of the pixel circuit, the first light-emitting control module 11 and the second switching transistor T2 are simultaneously turned on under the action of the light-emitting control signal Emit, and the first voltage signal U1 is transmitted to the second pole of the first switching transistor T1. Among them, the first voltage signal U1 can be a voltage signal with a fixed high level. For example, the first power supply signal PVDD can be multiplexed as the first voltage signal U1.

[0050] In an exemplary embodiment, please refer to Figure 5 , the voltage stabilizing module 12 further includes: a reset unit 123. The first end of the reset unit 123 is connected to the control end of the potential regulating unit 121. The second end of the reset unit 123 is used to receive the first reset signal V1, and the control end of the reset unit 123 is used to receive the first scan signal S2. Among them, during the first reset stage of the pixel circuit, the reset unit 123 is turned on in response to the first scan signal S2 to reset the potential of the control end of the potential regulating unit according to the first reset signal V1. The first reset stage is before the light-emitting stage.

[0051] It can be understood that the pixel circuits cannot affect each other frame by frame during driving. When the second power supply signal PVEE is multiplexed as the first scan signal S2, since the magnitude of the second power supply signal PVEE may fluctuate at different brightness levels, it is necessary to reset the control end of the potential regulating unit 121 to ensure that the potential of the control end of the potential regulating unit 121 is not affected by the previous frame. In this embodiment, the reset unit 123 is added. The reset unit 123 is electrically connected to the control end of the potential regulating unit 121 to reset the control end of the potential regulating unit 121, ensuring that the potential of the control end of the potential regulating unit 121 is not affected by the previous frame.

[0052] In an example, please refer to Figure 6 , the reset unit 123 includes: a third switching transistor T3. The first pole of the third switching transistor T3 is connected to the gate of the first switching transistor T1. The second pole of the third switching transistor T3 is used to receive the first reset signal V1, and the gate of the third switching transistor T3 is used to receive the first scan signal S2.

[0053] In this embodiment, please refer to Figure 7, during a driving cycle of the pixel circuit, the first reset stage t2 of the pixel circuit is before the light-emitting stage t1. During the first reset stage t2, the first scan signal S2 is at an effective level, and the third switching transistor T3 is turned on in response to the first scan signal S2 to reset the gate of the first switching transistor T1 of the potential adjustment unit 121 according to the first reset signal V1. After that, during the light-emitting stage t1 of the pixel circuit, it can be ensured that the gate of the first switching transistor T1 is not affected by the driving of the previous frame.

[0054] In an exemplary embodiment, please refer to Figure 8 , the pixel circuit further includes: a first reset module 13, a second light-emitting control module 14, a data writing module 15, a threshold compensation module 16, a second reset module 17, a bias adjustment module 18, and a storage capacitor C.

[0055] Among them, the first end of the first reset module 13 is used to receive the second reset signal Vref2, the second end of the first reset module 13 is connected to the anode of the light-emitting element D, and the control end of the first reset module 13 is used to receive the second scan signal S3. During the second reset stage of the pixel circuit, the first reset module 13 is turned on in response to the second scan signal S3 to reset the potential of the anode of the light-emitting element D according to the second reset signal Vref2. The second reset stage is before the light-emitting stage. The first reset module 13 includes a first reset transistor T5. The first pole of the first reset transistor T5 is used to receive the second reset signal Vref2, the second pole of the first reset transistor T5 is connected to the anode of the light-emitting element D, and the gate of the first reset transistor T5 is used to receive the second scan signal S3.

[0056] The first end of the second light-emitting control module 14 is used to receive the first power signal PVDD. The second end of the second light-emitting control module 14 is connected to the second pole of the driving transistor T0. The control end of the second light-emitting control module 14 is used to receive the light-emitting control signal Emit. In this embodiment, the first light-emitting control module 11 and the second light-emitting control module 14 are jointly used to control whether the pixel circuit is turned on. If the first light-emitting control module 11 and the second light-emitting control module 14 control the pixel circuit to be turned on, the light-emitting element D emits light. If the first light-emitting control module 11 or the second light-emitting control module 14 controls the pixel circuit to be turned off, the light-emitting element D does not emit light. The first light-emitting control module 11 may include a first light-emitting control transistor T4. The second light-emitting control module 14 may include a second light-emitting control transistor T6. The first pole of the first light-emitting control transistor T4 is connected to the first pole of the driving transistor T0. The second pole of the first light-emitting control transistor T4 is connected to the anode of the light-emitting element D. The gate of the first light-emitting control transistor T4 is used to receive the light-emitting control signal Emit. The first pole of the second light-emitting control transistor T6 is used to receive the first power signal PVDD. The second pole of the second light-emitting control transistor T6 is connected to the second pole of the driving transistor T0. The gate of the second light-emitting control transistor T6 is used to receive the light-emitting control signal Emit.

[0057] The first end of the data writing module 15 is connected to the second pole of the driving transistor T0. The second end of the data writing module 15 is used to receive the data signal Vdata. The control end of the data writing module 15 is used to receive the third scanning signal S4. The first end of the threshold compensation module 16 is connected to the first pole of the driving transistor T0. The second end of the threshold compensation module 16 is connected to the gate of the driving transistor T0. The control end of the threshold compensation module 16 is used to receive the fourth scanning signal S5. The data writing module 15 may include a data writing transistor T7. The threshold compensation module 16 may include a threshold compensation transistor T8. The first pole of the data writing transistor T7 is connected to the second pole of the driving transistor T0. The second pole of the data writing transistor T7 is used to receive the data signal Vdata. The gate of the data writing transistor T7 is used to receive the third scanning signal S4. The first pole of the threshold compensation transistor T8 is connected to the first pole of the driving transistor T0. The second pole of the threshold compensation transistor T8 is connected to the gate of the driving transistor T0. The gate of the threshold compensation transistor T8 is used to receive the fourth scanning signal S5.

[0058] The first end of the second reset module 17 is connected to the gate of the driving transistor T0. The second end of the second reset module 17 is used to receive the third reset signal Vref1. The control end of the second reset module 17 is used to receive the fifth scan signal S6. The second reset module 17 may include a second reset transistor T9. The first pole of the second reset transistor T9 is connected to the gate of the driving transistor T0. The second pole of the second reset transistor T9 is used to receive the third reset signal Vref1. The gate of the second reset transistor T9 is used to receive the fifth scan signal S6.

[0059] The first end of the bias adjustment module 18 is connected to the second pole of the driving transistor T0. The second end of the bias adjustment module 18 is used to receive the bias adjustment signal DVH. The control end of the bias adjustment module 18 is used to receive the sixth scan signal S7. In one example, the bias adjustment signal DVH can be multiplexed as the first voltage signal U1. The bias adjustment module 18 may include a bias adjustment transistor T10. The first pole of the bias adjustment transistor T10 is connected to the second pole of the driving transistor T0. The second pole of the bias adjustment transistor T10 is used to receive the bias adjustment signal DVH. The gate of the bias adjustment transistor T10 is used to receive the sixth scan signal S7.

[0060] In a detailed embodiment, please continue to refer to Figure 8 and Figure 7 , the light emission control signal Emit is multiplexed as the first control signal S1, the first power supply signal PVDD or the bias adjustment signal DVH is multiplexed as the first voltage signal U1, the second power supply signal PVEE is multiplexed as the second voltage signal U2, and the first power supply signal PVDD or the bias adjustment signal DVH is multiplexed as the first reset signal V1. During the light emission stage of the pixel circuit, due to process fluctuations or leakage of transistors in the pixel circuit. For example, during the light emission stage of the pixel circuit, the potential of the gate of the first switching transistor T1 is kept stable under the action of the zener diode F. The second switching transistor T2 is turned on in response to the first control signal S1, and the first voltage signal is transmitted to the second pole of the first switching transistor T1. Assuming that the off state of the first reset transistor T5 is not ideal, resulting in leakage from the anode of the light emitting element D, i.e., the N4 node, to the first pole of the first reset transistor T5, causing the potential of the anode of the light emitting element D to decrease. The gate-source voltage Ugs of the first switching transistor T1 = (Ug - Us) increases, thereby causing the source current of the first switching transistor T1 to increase, thus increasing the potential of the anode of the light emitting element D and keeping the potential of the anode of the light emitting element D stable.

[0061] In an exemplary embodiment, please refer to Figure 9 , the present application further provides a display panel 100, including the pixel circuit 10 in any of the above embodiments.

[0062] Based on the same application concept, an embodiment of the present application further provides a display device. Figure 10 The structural schematic diagram of the display device 200 provided by the embodiment of the present application is shown in Figure 10 As shown, the display device 200 includes the display panel 100 in any of the above embodiments. Exemplarily, as Figure 10 shown, the display device 200 includes the display panel 100. Therefore, the display device 200 also has the beneficial effects of the display panel 100 in the above embodiments. The same parts can be understood with reference to the explanation of the display panel 100 above, and will not be elaborated below.

[0063] The display device 200 provided by the embodiment of the present application can be Figure 10 the mobile phone shown, or any electronic product with a display function, including but not limited to the following categories: television, laptop, desktop monitor, tablet computer, digital camera, smart bracelet, smart glasses, vehicle-mounted display, industrial control equipment, medical display screen, touch interaction terminal, etc. The embodiment of the present application does not make special limitations on this.

[0064] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0065] The above embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A pixel circuit, characterized in that: include: Driver transistor; a first light-emitting control module, wherein a first end of the first light-emitting control module is connected to a first electrode of the driving transistor, a second end of the first light-emitting control module is connected to an anode of the light-emitting element, and a control end of the first light-emitting control module is used to receive a light-emitting control signal; A voltage stabilizing module, wherein a first end of the voltage stabilizing module is connected to the anode of the light emitting element, a second end of the voltage stabilizing module is used to receive a first voltage signal, a first control end of the voltage stabilizing module is used to receive a first control signal, and a second control end of the voltage stabilizing module is used to receive a second voltage signal; Wherein, in the light emitting stage of the pixel circuit, the first light emitting control module is turned on in response to the light emitting control signal to control the light emitting element to emit light; The voltage stabilizing module is turned on in response to the first control signal and the second voltage signal, and stabilizes the potential of the anode of the light emitting element according to the first voltage signal.

2. The pixel circuit according to claim 1, characterized in that: The voltage stabilizing module comprises: a potential regulating unit, wherein a first end of the potential regulating unit is connected to the anode of the light-emitting element, and a control end of the potential regulating unit is used to receive the second voltage signal; A control unit, wherein a first end of the control unit is connected to a second end of the potential regulating unit, the second end of the control unit is used to receive a first voltage signal, and a control end of the control unit is used to receive the first control signal; Among them, in the light-emitting stage, the control unit is turned on in response to the first control signal to provide the first voltage signal to the potential regulating unit, and the potential regulating unit is turned on in response to the second voltage signal to stabilize the potential of the anode of the light-emitting element according to the first voltage signal.

3. The pixel circuit according to claim 2, characterized in that: The potential adjustment unit comprises: a first switch tube, wherein a first electrode of the first switch tube is connected to an anode of the light-emitting element, and a second electrode of the first switch tube is connected to a first end of the control unit; A voltage regulator diode, wherein a cathode of the voltage regulator diode is connected to a gate of the first switch tube, and an anode of the voltage regulator diode is used to receive the second voltage signal.

4. The pixel circuit according to claim 3, characterized in that: The potential adjustment unit also includes: A resistor, wherein a first end of the resistor is connected to the second electrode of the first switch tube, and a second end of the resistor is connected to the gate of the first switch tube.

5. The pixel circuit according to claim 2, characterized in that: The control unit comprises: A second switch tube, wherein a first electrode of the second switch tube is connected to a second end of the potential regulating unit, a second electrode of the second switch tube is used to receive the first voltage signal, and a gate of the second switch tube is used to receive the first control signal.

6. The pixel circuit according to claim 3, characterized in that: The voltage stabilizing module further includes: A reset unit, wherein a first end of the reset unit is connected to a control end of the potential adjustment unit, a second end of the reset unit is used to receive a first reset signal, and a control end of the reset unit is used to receive a first scanning signal; Among them, in the first reset stage of the pixel circuit, the reset unit is turned on in response to the first scanning signal to reset the potential of the control end of the potential adjustment unit according to the first reset signal; the first reset stage is before the light-emitting stage.

7. The pixel circuit according to claim 6, characterized in that: The reset unit comprises: a third switch tube, wherein a first electrode of the third switch tube is connected to a gate electrode of the first switch tube, a second electrode of the third switch tube is used to receive a first reset signal, and a gate electrode of the third switch tube is used to receive a first scan signal; Wherein, in the first reset stage, the third switch tube is turned on in response to the first scan signal, so as to reset the gate of the first switch tube of the potential adjustment unit according to the first reset signal.

8. The pixel circuit according to claim 1, characterized in that: The pixel circuit further includes: a first reset module, wherein a first end of the first reset module is used to receive a second reset signal, a second end of the first reset module is connected to the anode of the light emitting element, and a control end of the first reset module is used to receive a second scanning signal; In the second reset stage of the pixel circuit, the first reset module is turned on in response to the second scanning signal to reset the potential of the anode of the light-emitting element according to the second reset signal, and the second reset stage is before the light-emitting stage.

9. The pixel circuit according to claim 1, characterized in that: The first control signal is the light emitting control signal.

10. The pixel circuit according to claim 1, characterized in that: The cathode of the light emitting element is used to receive a second power signal; the second voltage signal is the second power signal.

11. A display panel, characterized in that: The method comprises the pixel circuit as claimed in any one of claims 1 to 10.

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