A display panel and a display device

Abstract

This application provides a display panel and a display device. The display panel includes: light-emitting elements, including a first light-emitting element and a second light-emitting element; pixel circuits, including a first pixel circuit and a second pixel circuit, the first pixel circuit being connected to the first light-emitting element and the second pixel circuit being connected to the second light-emitting element; the pixel circuits receive bias adjustment signals, including a first bias adjustment signal and a second bias adjustment signal, the first pixel circuit receiving the first bias adjustment signal and the second pixel circuit receiving the second bias adjustment signal; the area of ​​the first light-emitting element is S1, and the area of ​​the second light-emitting element is S2; the voltage value of the first bias adjustment signal is V1, and the voltage value of the second bias adjustment signal is V2; wherein, (S1-S2)×(|V1|-|V2|)≠0. The technical solution of this application can utilize different bias adjustment signals for bias adjustment, thereby improving display quality.

Description

Technical Field

[0001] This application relates to the field of display device technology, and more specifically, to a display panel and a display device. Background Technology

[0002] With the continuous advancement of science and technology, more and more display devices are being widely used in people's daily lives and work, bringing great convenience to people's daily lives and work, and becoming an indispensable tool for people today.

[0003] The main component of a display device that enables its display function is the display panel. Within the display panel, pixel circuits adjacent to the light-emitting elements control the light-emitting elements to emit light for display. Existing display panels suffer from flickering issues when emitting light. Summary of the Invention

[0004] In view of the above, this application provides a display panel and a display device, the solution of which is as follows:

[0005] This application provides a display panel, including:

[0006] The light-emitting element includes a first light-emitting element and a second light-emitting element;

[0007] The pixel circuit includes a first pixel circuit and a second pixel circuit. The first pixel circuit is connected to a first light-emitting element, and the second pixel circuit is connected to a second light-emitting element.

[0008] The pixel circuit receives a bias adjustment signal, which includes a first bias adjustment signal and a second bias adjustment signal. The first pixel circuit receives the first bias adjustment signal, and the second pixel circuit receives the second bias adjustment signal.

[0009] The area of ​​the first light-emitting element is S1, and the area of ​​the second light-emitting element is S2;

[0010] The voltage value of the first bias adjustment signal is V1, and the voltage value of the second bias adjustment signal is V2; where,

[0011] (S1-S2)×(|V1|-|V2|)≠0.

[0012] This application also provides a display device, including the aforementioned display panel.

[0013] This application provides the aforementioned display panel and display device. The pixel circuit of the display panel can achieve bias adjustment based on an input bias adjustment signal, thereby solving the flickering problem of the display panel. The display panel includes a first pixel circuit receiving a first bias adjustment signal and a second pixel circuit receiving a second bias signal. The bias adjustment signal is used by the pixel circuit to achieve bias adjustment, and the magnitude of the bias adjustment signal affects the bias adjustment performance of the driving transistor in the pixel circuit. For light-emitting elements with different areas, the required current may differ when the same luminous brightness is needed. The driving transistor provides the driving current to the light-emitting element, and the magnitude of the driving current is related to the magnitude of the data signal. The threshold voltage deviation of the driving transistor affects the accuracy of the data signal input. Therefore, the bias state of the driving transistor corresponding to light-emitting elements with different luminous areas may be different. Therefore, by using different bias adjustment signals to adjust the bias state of different driving transistors, a more targeted adjustment effect can be achieved, resulting in a more consistent brightness when light-emitting elements of different areas display the same brightness. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0015] The structures, proportions, sizes, etc., shown in the accompanying drawings are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the implementation conditions of this application. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and purposes that this application can produce, should still fall within the scope of the technical content disclosed in this application.

[0016] Figure 1 This is a schematic diagram of the structure of a display panel provided in an embodiment of this application;

[0017] Figure 2 This is a schematic diagram of a pixel circuit provided in an embodiment of this application;

[0018] Figure 3 This is a schematic diagram of another pixel circuit provided in an embodiment of this application;

[0019] Figure 4 This is a schematic diagram of yet another pixel circuit provided in an embodiment of this application;

[0020] Figure 5 This is a schematic diagram of another pixel circuit provided in an embodiment of this application;

[0021] Figure 6 This is a schematic diagram of another display panel structure provided in an embodiment of this application;

[0022] Figure 7 This is a schematic diagram of the structure of another display panel provided in an embodiment of this application;

[0023] Figure 8 This is a schematic diagram of the structure of another display panel provided in an embodiment of this application;

[0024] Figure 9 This is a schematic diagram of the structure of another display panel provided in an embodiment of this application;

[0025] Figure 10 This is a schematic diagram of the structure of a display device provided in an embodiment of this application. Detailed Implementation

[0026] The embodiments of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0027] Various modifications and variations can be made to this application without departing from its spirit or scope, which will be apparent to those skilled in the art. Therefore, this application is intended to cover modifications and variations falling within the scope of the corresponding claims (the claimed technical solutions) and their equivalents. It should be noted that the embodiments provided in this application can be combined with each other without contradiction.

[0028] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] refer to Figure 1 As shown, Figure 1 This is a schematic diagram of the structure of a display panel provided in an embodiment of this application. The display panel 100 shown includes:

[0030] Light-emitting element 10, which includes a first light-emitting element P1 and a second light-emitting element P2;

[0031] Pixel circuit 10 includes a first pixel circuit 110 and a second pixel circuit 120. The first pixel circuit 110 is connected to the first light-emitting element P1, and the second pixel circuit 120 is connected to the second light-emitting element P2.

[0032] The pixel circuit 102 receives a bias adjustment signal, which includes a first bias adjustment signal and a second bias adjustment signal. The first pixel circuit 110 receives the first bias adjustment signal, and the second pixel circuit 120 receives the second bias adjustment signal.

[0033] The area of ​​the first light-emitting element P1 is S1, and the area of ​​the second light-emitting element P2 is S2;

[0034] The voltage value of the first bias adjustment signal is V1, and the voltage value of the second bias adjustment signal is V2; where,

[0035] (S1-S2)×(|V1|-|V2|)≠0.

[0036] In this embodiment, the pixel circuit 10 of the display panel 100 can achieve bias adjustment based on the input bias adjustment signal, thereby solving the flickering problem of the display panel. The display panel 100 is provided with a first pixel circuit 110 receiving a first bias adjustment signal and a second pixel circuit 120 receiving a second bias signal. The bias adjustment signal is used by the pixel circuit to achieve bias adjustment, and the magnitude of the bias adjustment signal affects the bias adjustment performance of the driving transistor in the pixel circuit 10. For light-emitting elements 10 with different areas, the required current may be different when the same luminous brightness is required. The driving transistor is used to provide driving current to the light-emitting element 10, and the magnitude of the driving current is related to the magnitude of the data signal. The threshold voltage deviation of the driving transistor affects the accuracy of the data signal input. Therefore, the bias state of the driving transistor corresponding to light-emitting elements 10 with different luminous areas may be different. Therefore, by using different bias adjustment signals to adjust the bias state of different driving transistors, a better adjustment effect can be achieved for different bias states, so that light-emitting elements 10 with different areas have a more consistent brightness when displaying the same brightness.

[0037] refer to Figures 2-5 As shown, Figure 2 This is a schematic diagram of a pixel circuit provided in an embodiment of this application. Figure 3 This is a schematic diagram of another pixel circuit provided in an embodiment of this application. Figure 4 This is a schematic diagram of yet another pixel circuit provided in an embodiment of this application. Figure 5This is a schematic diagram of another pixel circuit provided in an embodiment of this application. The pixel circuit 10 includes a data writing module 11, a driving module 12, a compensation module 13, and a bias adjustment module 14. The driving module 12 includes a driving transistor T2, which is used to provide driving current to the light-emitting element 20 of the display panel 100. The data writing module 11 is connected to the first terminal (i.e., node N2) of the driving transistor T2 and is used to provide a data signal Vdata to the driving transistor T2. The bias adjustment module 14 is connected to the first terminal (i.e., node N2) or the second terminal (i.e., node N3) of the driving transistor T2 and is used to provide a bias adjustment signal V0 to the driving transistor T2. The compensation module 13 is connected between the gate (i.e., node N1) and the second terminal (i.e., node N3) of the driving transistor and is used to compensate the threshold voltage of the driving transistor T2.

[0038] When the pixel circuit 10 is the first pixel circuit 110, the connected light-emitting element 20 is the first light-emitting element P1 with an area of ​​S1, and the bias adjustment signal V0 is the first bias adjustment signal V1. When the pixel circuit 10 is the second pixel 120, the connected light-emitting element 20 is the second light-emitting element P2 with an area of ​​S2, and the bias adjustment signal V0 is the second polarization adjustment signal V2.

[0039] In addition, the pixel circuit 10 may also include a reset module 15 for providing a reset signal Vref to the gate of the driving transistor T2; an initialization module 16 for providing an initialization signal Vini to the light-emitting element 20; and a light-emitting control module 17 for selectively allowing the light-emitting element 20 to enter the light-emitting stage. Optionally, the light-emitting control module 17 includes a first light-emitting control module 171 and a second light-emitting control module 172. The first light-emitting control module 171 is connected between the first power supply signal terminal and one terminal of the driving transistor T2, and the second light-emitting control module 172 is connected between the other terminal of the driving transistor T2 and the light-emitting element 20. The light-emitting element 20 is connected between the output terminal and the second power supply signal terminal of the pixel circuit 10.

[0040] Optionally, in this embodiment, the control terminal of the data writing module 11 receives a first scan signal Sc1, which controls the opening and closing of the data writing module 11; the control terminal of the compensation module 13 receives a second scan signal Sc2, which controls the opening and closing of the compensation module 13; the control terminal of the bias adjustment module 14 receives a bias adjustment control signal SV, which controls the opening and closing of the bias adjustment module 14; the control terminal of the reset module 15 receives a third scan signal Sc3, which controls the opening and closing of the reset module 15; the control terminal of the initialization module 16 receives a fourth scan signal Sc4, which controls the opening and closing of the initialization module 16; and the control terminal of the light emission control module 17 receives a light emission control signal EM, which controls the opening and closing of the light emission control module 17.

[0041] Alternatively, in this embodiment, the data writing module 11 includes a data writing transistor T1, and a first scan signal Sc1 controls the turning on and off of the data writing transistor T1; the compensation module 13 includes a compensation transistor T3, and a second scan signal Sc2 controls the turning on and off of the compensation transistor T3; the bias adjustment module 14 includes a bias adjustment transistor T4, and a bias adjustment control signal SV controls the turning on and off of the bias adjustment transistor T4; the reset module 15 includes a reset transistor T5, and a third scan signal Sc3 controls the turning on and off of the reset transistor T5; the initialization module 16 includes an initialization transistor T6, and a fourth scan signal Sc4 controls the turning on and off of the initialization transistor T6; the first light emission control module 171 includes a first light emission control transistor T7, and the second light emission control module 172 includes a second light emission control transistor T8, and a light emission control signal EM controls the turning on and off of the first light emission control transistor T7 and the second light emission control transistor T8.

[0042] It should be noted that, when conditions permit, at least two of the following signals, such as the first scan signal Sc1, the second scan signal Sc2, the third scan signal Sc3, the fourth scan signal Sc4, the bias adjustment control signal SV, and the light emission control signal EM, can be the same signal. For example, when the bias adjustment transistor T4 and the initialization transistor T6 are transistors of the same type, the bias adjustment control signal SV and the fourth scan signal Sc4 can be the same signal.

[0043] It should be noted that, as Figure 2 and Figure 3 As shown, the driving transistor T2 is a PMOS transistor, and the pixel circuit 10 also includes a storage capacitor C1. The first terminal of the storage capacitor C1 is connected to the first power supply signal terminal, and the second terminal is connected to the gate of the driving transistor T2, for storing the signal transmitted to the gate of the driving transistor T2. Wherein, as... Figure 2As shown, the bias adjustment module 14 is connected to the first terminal of the driving transistor T2, i.e., node N2, as follows. Figure 3 As shown, the bias adjustment module 14 is connected to the second terminal of the driving transistor T2, i.e., node N3. Figure 4 and Figure 5 As shown, the driving transistor T2 is an NMOS transistor, and the pixel circuit 10 also includes a storage capacitor C1. The first terminal of the storage capacitor C1 is connected to the light-emitting element 20, and the second terminal is connected to the gate of the driving transistor T2, for storing the signal transmitted to the gate of the driving transistor T2. Wherein, as Figure 4 As shown, the bias adjustment module 14 is connected to the first terminal of the driving transistor T2, i.e., node N2, as follows. Figure 5 As shown, the bias adjustment module 14 is connected to the second terminal of the driving transistor T2, namely node N3.

[0044] In the above manner, a bias adjustment module 14 is set in the pixel circuit 10. The bias adjustment module 14 is used to provide a bias adjustment signal V0 to the driving transistor T2. Because the potential difference between the gate and the first or second electrode of the driving transistor T2 during light emission may cause bias problems, specifically, when the driving transistor T2 is a PMOS transistor, a bias problem will occur when the gate voltage is greater than the voltage of the first or second electrode; similarly, when the driving transistor T2 is an NMOS transistor, a bias problem will occur when the gate voltage is less than the voltage of the first or second electrode. Bias problems often lead to a reverse electric field inside the driving transistor T2, causing carrier polarization, which in turn causes a shift in the threshold voltage of the driving transistor T2. This threshold voltage shift results in unstable driving current generated by the driving transistor T2, especially during grayscale changes, which can cause flickering. In this embodiment, by providing a bias adjustment signal V0 to the first or second terminal of the driving transistor T2, the voltage difference between the gate of the driving transistor T2 and the first or second terminal is adjusted in a timely manner to counteract the bias problem and prevent the threshold voltage of the driving transistor T2 from shifting, thereby helping to reduce the flickering phenomenon.

[0045] It should be noted that, Figures 2-5 This document merely provides several exemplary configurations of the bias adjustment module 14 in a pixel circuit, but does not cover all of them. Any other configurations of the bias adjustment module 14 that provide a bias adjustment signal to the pixel circuit to adjust the bias state of the driving transistor T2 and satisfy the limitation of the bias adjustment signal V0 in this embodiment are all within the scope of protection of this application embodiment, and will not be elaborated upon in this embodiment.

[0046] exist Figures 2-5In the illustrated configuration, the first power signal terminal is used to connect to a high-level power signal PVDD, and the second power signal terminal is used to connect to a low-level power signal PVEE. The positive terminal of the light-emitting element 20 is connected to the output terminal of the pixel circuit 20, and the negative terminal is connected to the second power signal terminal. In other configurations, the second power signal terminal can be used to connect to the high-level power signal PVDD, the first power signal terminal can be used to connect to the low-level power signal PVEE, the negative terminal of the light-emitting element 20 can be connected to the output terminal of the pixel circuit 20, and the positive terminal can be connected to the second power signal terminal.

[0047] Because the bias adjustment signal mainly adjusts the bias state of the driving transistor T2, and the bias state of the driving transistor T2 is mainly caused by the bias state due to the voltage difference between the source and gate and the drain and gate during the light-emitting stage. Taking the PMOS type driving transistor T2 as an example, since the gate potential of the driving transistor T2 during the light-emitting stage is Vdata-|Vth|, where |Vth| is the threshold voltage, and the source potential of the driving transistor T2 is PVDD, a situation may exist where the source potential of the driving transistor T2 is greater than the gate potential, while the drain potential is less than the gate potential. In this case, there will be a bias state between the gate and drain. There is a reverse built-in electric field that may cause carrier polarization inside the driving transistor T2, resulting in a shift in the threshold voltage. This is the bias problem of the driving transistor T2. To solve the bias problem, a bias adjustment stage needs to be set in the next frame after the light emission stage ends. A higher bias adjustment signal V0 is applied to the drain of the driving transistor T2, making the drain voltage greater than the gate voltage, thereby canceling out the previous built-in electric field. This is the principle of the bias adjustment process. For the NMOS type driving transistor T2, the principle is basically the same. The difference is that the drain voltage may be higher than the gate voltage during the light emission stage, requiring a lower potential as the bias adjustment signal V0.

[0048] The bias state will cause the threshold voltage of the driving transistor T2 to shift. The shift in threshold voltage will cause the data written by the driving transistor T2 during the data writing stage to be inaccurate when the grayscale changes. Multiple refreshes are required to gradually stabilize the data. The data signal Vdata determines the driving current. Inaccurate input of the data signal Vdata will lead to inaccurate driving current, which will cause the human eye to see the screen flickering.

[0049] As mentioned above, for light-emitting elements 20 with different areas, the required current may be different when the same luminous brightness is required. The driving transistor T2 is used to provide driving current for the light-emitting element 20. The magnitude of the driving current is related to the magnitude of the data signal Vdata. The threshold voltage |Vth| deviation of the driving transistor T2 affects the accuracy of the data signal Vdata input. Therefore, the bias state of the driving transistor T2 corresponding to light-emitting elements 20 with different luminous areas may be different. Therefore, by using different bias adjustment signals V0 to adjust the bias state of different driving transistors T2, it is possible to more effectively adjust the bias state of different driving transistors T2.

[0050] Optionally, in some embodiments of this application, (S1-S2)×(|V1|-|V2|)>0 can be set. When S1>S2, |V1|>|V2|; when S1<S2, |V1|<|V2|. If the driving transistor T2 is a PMOS transistor, both V1 and V2 are positive voltages, and in this case, (S1-S2)×(V1-V2)>0. If the driving transistor T2 is an NMOS transistor, both V1 and V2 are negative values, and in this case, (S1-S2)×(V1-V2)<0. Inaccurate input of the data signal Vdata leads to inaccurate driving current. When the area of ​​the light-emitting element 20 is larger, the inaccuracy of the driving current results in more obvious light emission non-uniformity and flickering. Therefore, for the light-emitting element 20 with a larger light-emitting area, a larger bias adjustment signal V0 is input to enable the light-emitting element 20 with a larger light-emitting area to quickly cancel the bias state, thereby reducing the flickering phenomenon caused by the bias problem of the driving transistor T2 during grayscale changes. When the driving transistor is a PMOS type transistor, the light-emitting element 20 with a larger light-emitting area receives a positive bias adjustment signal V0 with a larger absolute value; when the driving transistor is an NMOS type transistor, the light-emitting element 20 with a larger light-emitting area receives a negative bias adjustment signal V0 with a larger absolute value.

[0051] Based on the above description, it can be seen that the larger the area of ​​the light-emitting element 20, the larger the absolute value of the bias adjustment signal V0 connected to the pixel circuit 10; conversely, the smaller the area of ​​the light-emitting element 20, the smaller the absolute value of the bias adjustment signal V0 connected to the pixel circuit 10. This is because for a light-emitting element 20 with a larger light-emitting area, the uneven light emission caused by inaccurate driving current is more obvious, and the flickering problem is more serious. Therefore, a larger bias adjustment signal V0 is needed so that the light-emitting element 20 with a larger light-emitting area can quickly offset the bias state, thereby reducing the flickering problem caused by the bias problem of the driving transistor T2 during low grayscale changes. Conversely, for a light-emitting element 20 with a smaller light-emitting area, the uneven light emission caused by inaccurate driving current is less obvious, and the flickering problem is less serious. Therefore, a smaller bias adjustment signal V0 is needed so that the light-emitting element 20 with a smaller light-emitting area can quickly offset the bias state.

[0052] When (S1-S2)×(|V1|-|V2|)>0, if S1>S2, then |S1 / S2|>|V1 / V2|; or, if S1<S2, then |S1 / S2|<|V1 / V2|. Since V1 and V2 are the bias adjustment signals V0 connected to the first pixel circuit 110 and the second pixel circuit 120 respectively, they mainly function to adjust the bias state of the driving transistor T2 in the pixel circuit 10. The general range of V1 and V2 is between -6V and +6V, and the difference between V1 and V2 is generally not too large. If it is too large, it may cause differences in the states of different driving transistors T2, which in turn leads to a decrease in the uniformity of light emission from light-emitting elements 20 of different areas. Therefore, when S1>S2, |V1 / V2| is generally smaller, and when S1<S2, |V1 / V2| is generally larger. If the light-emitting areas of the light-emitting elements 20 are not significantly different, there is no need to change the bias adjustment signal V0. Only when the light-emitting areas are significantly different does it need to adjust the bias state for light-emitting elements 20 of different areas. Therefore, if S1 > S2, then |S1 / S2| > |V1 / V2|. Similarly, if S1 < S2, then |S1 / S2| < |V1 / V2|.

[0053] Optionally, in some embodiments of this application, (S1-S2)×(|V1|-|V2|)<0 can be set. In this case, the pixel circuits 10 connected to the light-emitting elements 20 with different areas are connected to different bias adjustment signals V0, and the light-emitting element 20 with a larger area corresponds to the bias adjustment signal V0 with a smaller absolute value, while the light-emitting element 20 with a smaller area corresponds to the bias adjustment signal with a larger absolute value.

[0054] In some implementations, (S1-S2)×(V1-V2)<0 may occur. For example, when the display panel 100 includes a normal display area and some special function areas (such as an under-display camera area), the area of ​​the light-emitting element 20 in the special function area is relatively large, but the display requirements for the special function area are not high. In this case, the pixel circuit 10 connected to the light-emitting element 20 in the special function area does not need a large absolute value adjustment signal V0 to save power consumption. Alternatively, the refresh rate of the normal display area is low, while the data refresh rate of the special function area is high due to special functional requirements. In this case, when the data refresh rate of the special function area is high, the data signal Vdata received by the driving transistor T2 in the pixel circuit 10 changes at a high frequency, resulting in a shorter time for the driving transistor T2 to remain in the same bias state. The bias problem itself is not very serious, and in this case, a smaller absolute value bias adjustment signal V0 can also be set to save power consumption.

[0055] When (S1-S2)×(|V1|-|V2|)<0, if S1>S2, then |S1 / S2|>|V2 / V1|; or, if S1<S2, then |S1 / S2|<|V2 / V1|. As mentioned above, the bias adjustment signal V0 mainly adjusts the bias state of the driving transistor T2 in the pixel circuit 10. The general range of V1 and V2 is between -6V and +6V, and the difference between V1 and V2 is generally not too large. If it is too large, it may cause differences in the state of different driving transistors T2, which in turn leads to a decrease in the uniformity of light emission of light-emitting elements 20 with different areas. Therefore, if S1>S2, |V2 / V1| is generally small, and if S1<S2, |V2 / V1| is generally large. If the light emission area of ​​the light-emitting element 20 is not significantly different, there is no need to change the bias adjustment signal V0. Only when the difference in light emission area is large is it necessary to adjust the bias state separately for light-emitting elements 20 with different areas. Therefore, if S1 > S2, then |S1 / S2| > |V2 / V1|; or, if S1 < S2, then |S1 / S2| < |V2 / V1|.

[0056] Optionally, in some embodiments of this application, |S1-S2| / |S2|>|V1-V2| / |V2|. For the first light-emitting element P1 and the second light-emitting element P2 with different light-emitting areas, as described above, the difference in the bias adjustment signal V0 corresponding to the difference in their light-emitting areas is generally not too large, that is, the difference between V1 and V2 is not too large, so that the light-emitting elements 20 with different areas have better light emission uniformity. Therefore, the proportion of |S1-S2| to |S2| is generally greater than the proportion of |V1-V2| to |V2|. If the proportion of |V1-V2| to |V2| is large, it may cause differences in the states of different driving transistors T2, which in turn leads to a deterioration in the light emission uniformity of the light-emitting elements 20 with different areas. Therefore, |S1-S2| / |S2|>|V1-V2| / |V2| is set.

[0057] In this embodiment of the application, the first pixel circuit 110 includes a first driving transistor, and the second pixel circuit 120 includes a second driving transistor; the width-to-length ratio of the channel region of the first driving transistor is R1, and the width-to-length ratio of the channel region of the second driving transistor is R2; wherein, (R1-R2)×(|V1|-|V2|)≠0.

[0058] As described above, the first driving transistor is the driving transistor T2 in the first pixel circuit 110, the second driving transistor is the driving transistor T2 in the second pixel circuit 120, the bias adjustment signal V0 input to the first pixel circuit 110 is the first bias adjustment signal V1, and the bias adjustment signal V0 input to the second pixel circuit 120 is the second bias adjustment signal V2. Different light-emitting areas of the light-emitting element 20 require different driving currents. The larger the area of ​​the light-emitting element 20, the more pronounced the uniformity problem may occur when the driving current is inaccurate. The driving transistor T2 provides the driving current to the light-emitting element 20. The aspect ratio of the channel region of the driving transistor T2 determines its ability to output driving current. Therefore, for light-emitting elements 20 with different light-emitting areas, the aspect ratio of the channel region of the driving transistor T2 is different. Since the aspect ratio of the channel region of the driving transistor T2 is different, the bias state of the driving transistor T2 may also be different. Different bias adjustment signals need to be provided for different driving transistors T2 to adjust them independently, so that light-emitting elements 20 with different areas can display the same brightness with good brightness uniformity. Therefore, (R1-R2)×(|V1|-|V2|)≠0 is set.

[0059] In some embodiments of this application, when (R1-R2)×(|V1|-|V2|)≠0, (R1-R2)×(|V1|-|V2|)<0 can be set. In this case, the bias adjustment signal V0 connected to the pixel circuit 10 corresponding to the driving transistor T2 with a larger channel width-to-length ratio is smaller, and vice versa. When the driving transistor T2 is a PMOS transistor, a smaller width-to-length ratio indicates a longer channel length for the same channel width. A longer channel length means that, given a fixed gate voltage and source voltage, and a fixed driving current, a larger voltage difference between the gate and drain of the driving transistor T2 may occur. The bias problem of the driving transistor T2 is caused by the bias voltage between the gate and drain, and the bias problem may be more severe. Therefore, for the driving transistor T2 with a smaller channel width-to-length ratio, a bias adjustment signal V0 with a larger absolute value is used to adjust the bias, thereby fully offsetting its bias voltage. Conversely, for the driving transistor T2 with a larger channel width-to-length ratio, a bias modulation signal V0 with a smaller absolute value is used to adjust the bias, thereby fully offsetting its bias voltage.

[0060] In some embodiments of this application, when (R1-R2)×(|V1|-|V2|)<0, if R1>R2, then |R1 / R2|>|V2 / V1|; or, if R1<R2, then |R1 / R2|<|V2 / V1|. As mentioned above, the bias adjustment signal V0 is mainly used to adjust the bias state of the driving transistor T2. The bias adjustment signal V0 is generally in the range of -6V to +6V. In order to avoid uneven display between different light-emitting elements 20, the values ​​of V1 and V2 are generally not too different. As for R1 and R2, when the difference between R1 and R2 is not large, there is no need to differentiate the design of V1 and V2. Only when the difference between R1 and R2 is large, resulting in obvious differences in the bias of different driving transistors T2, is it necessary to use different V1 and V2 to adjust for different driving transistors T2. Therefore, if R1 > R2, set |R1 / R2| > |V2 / V1|, or if R1 < R2, set |R1 / R2| < |V2 / V1|.

[0061] In some embodiments of this application, when (R1-R2)×(|V1|-|V2|)≠0, (R1-R2)×(|V1|-|V2|)>0 can be set. In this case, the bias adjustment signal V0 connected to the pixel circuit 10 corresponding to the driving transistor T2 with a larger channel width-to-length ratio is larger, and conversely, the bias adjustment signal V0 connected to the pixel circuit 10 corresponding to the driving transistor T2 with a smaller channel width-to-length ratio is smaller. In some implementations, the display panel 100 may have a normal display area and a special function area. To meet certain special functions, the aspect ratio of the driving transistor T2 in the special function area may be small. However, the display requirements for the special function area may not be high, and it is not necessary to set a bias adjustment signal V0 with a large absolute value to meet the requirements, so as to save power consumption. Alternatively, when the data refresh frequency of the special function area is high, because the gate and drain voltages of the driving transistor T2 are changing at a high frequency, they will not remain in the same bias state for a long time. Therefore, the bias problem itself is not very serious, and a bias adjustment signal V0 with a small absolute value can be set to meet the requirements and save power consumption. In this case, (R1-R2)×(|V1|-|V2|)>0 can be set.

[0062] In some embodiments of this application, when (R1-R2)×(|V1|-|V2|)>0, R1>R2, then |R1 / R2|>|V1 / V2|; or, R1<R2, then |R1 / R2|<|V1 / V2|. The bias adjustment signal V0 is mainly used to adjust the bias state of the driving transistor T2. The bias adjustment signal V0 is generally in the range of -6V to +6V. In order to avoid uneven display between different light-emitting elements 20, the values ​​of V1 and V2 are generally not too different. As for R1 and R2, when the difference between R1 and R2 is not large, there is no need to differentiate the design of V1 and V2. Only when the difference between R1 and R2 is large, resulting in obvious differences in the bias of different driving transistors T2, is it necessary to use different V1 and V2 to adjust for different driving transistors T2. Therefore, if R1 > R2, set |R1 / R2| > |V1 / V2|; or if R1 < R2, set |R1 / R2| < |V1 / V2|.

[0063] refer to Figure 6 As shown, Figure 6 This is a schematic diagram of another display panel structure provided in an embodiment of this application. Based on the above embodiments, Figure 6In the display panel 100 shown, the light-emitting element 20 further includes a third light-emitting element P3; the pixel circuit 10 further includes a third pixel circuit 130, which is connected to the third light-emitting element P3; the bias adjustment signal V0 includes a third bias adjustment signal; the area of ​​the third light-emitting element P3 is S3, and the voltage value of the third bias adjustment signal is V3; wherein, |V1-V2|>|V2-V3|≥0; and / or, |V1-V2|>|V1-V3|≥0.

[0064] Since (S1-S2)×(|V1|-|V2|)≠0, V1≠V2. V2 and V3 may be the same or different, and V1 and V3 may be the same or different. As mentioned above, when S1 and S2 differ significantly, V1 and V2 are different, so that the bias state of the driving transistor T2 in the first pixel circuit 110 and the second pixel circuit 120 can be adjusted independently. When a third light-emitting element P3 is present, the difference between S1 and S3 is less than the difference between S1 and S2, or the difference between S2 and S3 is less than the difference between S1 and S2, or the difference between R1 and R3 is less than the difference between R1 and R2, or the difference between R2 and R3 is less than the difference between R1 and R2. Therefore, the difference between V1 and V3 can be set to be less than the difference between V1 and V2, i.e., |V1-V2|>|V1-V3|≥0, or the difference between V2 and V3 is less than the difference between V1 and V2, i.e., |V1-V2|>|V2-V3|≥0. In particular, when |V1-V2|>|V1-V3|≥0, V1=V3 can be made, or when |V1-V2|>|V2-V3|≥0, V2=V3 can be made. This allows the same bias adjustment signal V0 to be used when the difference in the light-emitting area between the light-emitting elements 20 or the width-to-length ratio of the channel region of the corresponding driving transistor T2 is not significant, thereby simplifying the manufacturing process of the display panel.

[0065] The display panel 100 has three light-emitting elements 20 of different colors, which are used to emit three primary colors of light to achieve color display. These three light-emitting elements 20 of different colors can be the first light-emitting element P1, the second light-emitting element P2, and the third light-emitting element P3, as described above. Generally, light-emitting elements 20 of different colors have different luminous efficiencies. When the difference in luminous efficiencies between the light-emitting elements 20 of different colors is large, in order to achieve a better white balance display effect, the light-emitting element 20 with lower luminous efficiency is set to have a larger area, and the light-emitting element 20 with higher luminous efficiency is set to have a smaller area. If the difference in luminous efficiency between the light-emitting elements 20 of different colors is small, their luminous areas can be set to be the same or similar. Specifically, the three light-emitting elements 20 of different colors in the display panel 100 can be a red light-emitting element R, a green light-emitting element G, and a blue light-emitting element B.

[0066] exist Figure 1 In the illustrated configuration, for the three light-emitting elements 20 of different colors in the display panel 100, the light-emitting element 20 with the highest luminous efficiency is the first light-emitting element P1, the light-emitting element 20 with the lowest luminous efficiency is the second light-emitting element P2, and the light-emitting element 20 with intermediate luminous efficiency is either the first light-emitting element P1 or the second light-emitting element P2; Figure 6 In the illustrated configuration, for the three light-emitting elements 20 with different luminous colors in the display panel 100, the light-emitting element 20 with the highest luminous efficiency is the first light-emitting element P1, the light-emitting element 20 with the lowest luminous efficiency is the second light-emitting element P2, and the light-emitting element 20 with intermediate luminous efficiency is the third light-emitting element.

[0067] In some embodiments, as described above, the display panel 100 may be configured to have a normal display area and a special function area, with the light-emitting elements 20 in the two areas having different areas. The light-emitting element 20 in one of the normal display area and the special function area may be designated as a first light-emitting element P1, and the light-emitting element 20 in the other area may be designated as a second light-emitting element P2.

[0068] The display panel 100 can be configured to have three different light-emitting elements 20 with different emitting colors, arranged in an array. It can be configured that the light-emitting elements 20 in the same row have the same emitting color, while the light-emitting elements 20 in different rows have different emitting colors, and the primary emitting colors of any three adjacent rows of light-emitting elements 20 are all different. Figure 1 and Figure 6 As shown; or, the light-emitting elements 20 in the same column can be set to have the same light-emitting color, while the light-emitting elements 20 in different columns can have different light-emitting colors, and the primary light-emitting colors of any three adjacent columns of light-emitting elements 20 can be different from each other. In these two arrangements of light-emitting elements 20, the light-emitting element 20 with one light-emitting color is designated as the first light-emitting element P1, and the light-emitting elements 20 with the other two light-emitting colors are designated as the second light-emitting element P2. Alternatively, three light-emitting elements 20 with different light-emitting colors can be set as the first light-emitting element P1, the second light-emitting element P2, and the third light-emitting element P3.

[0069] refer to Figure 7 As shown, Figure 7This is a schematic diagram of another display panel structure provided in an embodiment of this application. The display panel 100 has three light-emitting elements 20 with different emitting colors. The display panel 100 has multiple rows of light-emitting elements 20 and multiple columns of light-emitting elements 20. In this configuration, for any two adjacent rows, one row contains only light-emitting elements 20 of the first emitting color, while in the other row, light-emitting elements 20 of the second and third emitting colors are alternately distributed, and the light-emitting elements 20 in adjacent rows are staggered, that is, the gap between two adjacent light-emitting elements 20 in one row corresponds to the light-emitting element 20 in the other row; for any two adjacent columns, one column contains only light-emitting elements 20 of the first emitting color, while in the other column, light-emitting elements 20 of the second and third emitting colors are alternately distributed, and the light-emitting elements 20 in adjacent columns are staggered, that is, the gap between two adjacent light-emitting elements 20 in one column corresponds to the light-emitting element 20 in the other column.

[0070] In this embodiment, the arrangement of the light-emitting elements 20 in the display panel 100 can be set according to requirements, and any existing arrangement of light-emitting elements can be adopted. This embodiment does not limit the arrangement of the light-emitting elements 20.

[0071] Generally, light-emitting elements 20 of the same color have the same area, while light-emitting elements 20 of different colors have different areas. In some special cases, light-emitting elements 20 of the same color can also be set to have different areas. For example, if the display panel 100 includes a normal display area and some special function areas (such as the under-display camera area), the light-emitting elements 20 of the same color will have different areas in the normal display area and the special function area.

[0072] Generally, light-emitting elements 20 with significant differences in luminous efficiency have different areas, with the light-emitting element 20 having a smaller area due to its higher luminous efficiency. However, in certain cases, such as within the aforementioned special functional areas, all light-emitting elements can be configured to have the same area. In such cases, even if the luminous efficiency of the light-emitting elements 20 differs significantly, their areas can still be set to be identical.

[0073] In this embodiment, S1≠S2≠S3. The first light-emitting element P1, the second light-emitting element P2, and the third light-emitting element P3 can be three different light-emitting elements 20 with different emitting colors. Under normal circumstances, the luminous efficiency of the three is different. In order to achieve a better white balance display effect, the areas of the three primary light-emitting colors 20 are set to be different.

[0074] When a third light-emitting element P3 is present, |S1-S2|>|S1-S3|≥0 can be set; and / or, |S1-S2|>|S2-S3|≥0. Since (S1-S2)×(|V1|-|V2|)≠0, S1≠S2. S2 and S3 may be the same or different, and S1 and S3 may be the same or different. As mentioned above, when S1 and S2 differ significantly, V1 and V2 are different, so that the bias state of the driving transistor T2 in the first pixel circuit 110 and the second pixel circuit 120 can be adjusted independently. When a third light-emitting element P3 is present, the difference between S1 and S3 is less than the difference between S1 and S2, or the difference between S2 and S3 is less than the difference between S1 and S2. Therefore, the difference between V1 and V3 can be set to be less than the difference between V1 and V2, i.e., |V1-V2|>|V1-V3|≥0, or the difference between V2 and V3 is less than the difference between V1 and V2, i.e., |V1-V2|>|V2-V3|≥0.

[0075] When a third light-emitting element P3 is present, |R1-R2|>|R1-R3|≥0 can be set; and / or, |R1-R2|>|R2-R3|≥0. Since (R1-R2)×(|V1|-|V2|)≠0, R1≠R2. R2 and R3 can be the same or different, and R1 and R3 can be the same or different. As mentioned above, when R1 and R2 are significantly different, V1 and V2 are different, so as to independently adjust the bias state of the driving transistor T2 in the first pixel circuit 110 and the second pixel circuit 120. When a third light-emitting element P3 is present, the difference between R1 and R3 is less than the difference between R1 and R2, or the difference between R2 and R3 is less than the difference between R1 and R2. Therefore, the difference between V1 and V3 can be set to be less than the difference between V1 and V2, i.e., |V1-V2|>|V1-V3|≥0, or the difference between V2 and V3 is less than the difference between V1 and V2, i.e., |V1-V2|>|V2-V3|≥0.

[0076] refer to Figure 8 As shown, Figure 8This is a schematic diagram of another display panel structure provided in an embodiment of this application. The display panel 100 includes a first bias adjustment signal line L1 and a second bias adjustment signal line L2. The first bias adjustment signal line L1 transmits a first bias adjustment signal V1, and the second bias adjustment signal line L2 transmits a second bias adjustment signal V2. In the display panel 100 provided in this embodiment, the first pixel circuit 110 and the second pixel circuit 120 need to input different first bias adjustment signals V1 and second bias adjustment signals V2 respectively. By setting different bias adjustment signal lines to transmit the first bias adjustment signal V1 and the second bias adjustment signal V2 respectively, it is convenient to connect the first pixel circuit 110 and the second pixel circuit 120 to the first bias adjustment signal V1 and the second bias adjustment signal V2 respectively.

[0077] Optionally, in some embodiments of this application, it can be as follows: Figure 8 As shown, the first bias adjustment signal line L1 and the second bias adjustment signal line L2 are set to extend in the same direction. For the array-arranged light-emitting elements 20, the first bias adjustment signal line L1 and the second bias adjustment signal line L2 can both extend along the row direction of the array, or both extend along the column direction of the array. This application does not limit this.

[0078] refer to Figure 9 As shown, Figure 9 This is a schematic diagram of another display panel structure provided in an embodiment of this application. In this configuration, the first bias adjustment signal line L1 extends along a first direction, and the second bias adjustment signal line L2 extends along a second direction, with the first and second directions intersecting. For the arrayed light-emitting elements 20, one of the first bias adjustment signal line L1 and the second bias adjustment signal line L2 can be configured to extend along the row direction of the array, and the other along the column direction of the array. In this case, the first and second directions are perpendicular.

[0079] Figure 8 In the display panel 100 shown, taking the array arrangement of light-emitting elements 20 as an example, the wiring method of the first bias adjustment signal line L1 and the second bias adjustment signal line L2 is illustrated. It is readily apparent that the wiring of the first bias adjustment signal line L1 and the second bias adjustment signal line L2 can be based on the layout of the light-emitting elements 20 in the display panel 100, and is not limited to... Figure 7 and Figure 8 As shown.

[0080] In this embodiment, the display panel 100 may include a first light-emitting element group and a second light-emitting element group; the first light-emitting element group includes N1 rows of first light-emitting elements P1 arranged along a first preset direction, where N1 ≥ 1; the second light-emitting element group includes N2 rows of second light-emitting elements P2 arranged along the first preset direction, where N2 ≥ 1; wherein, the first pixel circuit 110 connected to the N1 rows of light-emitting elements 20 in the first light-emitting element group is connected to a first bias adjustment signal line L1 and receives a first bias adjustment signal V1; the second pixel circuit 120 connected to the N2 rows of light-emitting elements 20 in the second light-emitting element group is connected to a second bias adjustment signal line L2 and receives a second bias adjustment signal V2. Figure 7 or Figure 8 As shown, the first light-emitting element group can be configured to include each row of first light-emitting elements P1, and the second light-emitting element group can be configured to include each row of second light-emitting elements P2.

[0081] Optionally, along a first preset direction, the first bias adjustment signal line L1 and the second bias adjustment signal line L2 are disposed in the row gap of the first light-emitting element P1 in row N1 and / or the row gap of the second light-emitting element P2 in row N2. For example... Figure 8 As shown, the first bias adjustment signal line L1 is located in the gap between two adjacent rows of first light-emitting elements P1, and the second bias adjustment signal line L2 is located in the gap between two adjacent rows of second light-emitting elements P2. Obviously, in other configurations, the first bias adjustment signal line L1 and the second bias adjustment signal line L2 can also be positioned along a preset direction in the column gap between the first light-emitting elements P1 in row N1 and / or the column gap between the second light-emitting elements P2 in row N2.

[0082] In some embodiments, along a first preset direction, there is a spacing of M1 second bias adjustment signal lines L2 between two adjacent first bias adjustment signal lines L1, and a spacing of M2 first bias adjustment signal lines L1 between two adjacent second bias adjustment signal lines L2; ​​wherein, M1≥1, and / or, M2≥1. Figure 8 As shown, any two adjacent first bias adjustment signal lines L1 are separated by two second bias adjustment signal lines L2, at which point M1 = 2; some adjacent two second bias adjustment signal lines L2 are separated by one first bias adjustment signal line L1, at which point M2 = 1.

[0083] In other methods, when the light-emitting element 20 in the display panel 100 adopts Figure 8 In the layout shown, the two rows of second light-emitting elements P2 between the two adjacent rows of first light-emitting elements P1 can also share a second bias adjustment signal line L2. In this case, the first bias adjustment signal line L1 and the second bias adjustment signal line L2 are arranged alternately in the column direction, and M1 = M2 = 1.

[0084] When the light-emitting element 20 in the display panel 100 adopts Figure 7 In the layout shown, if both the first bias adjustment signal line L1 and the second bias adjustment signal line L2 extend along the row direction, then the first bias adjustment signal line L1 and the second bias adjustment signal line L2 are arranged alternately in the column direction, and M1 = M2 = 1.

[0085] In this embodiment, the color of the emitted light from the first light-emitting element P1 is different from the color of the emitted light from the second light-emitting element P2. As described above, the display panel 100 includes three light-emitting elements 20 with different emitting colors. Two of these three light-emitting elements 20 are the first light-emitting element P1 and the second light-emitting element P2, and the third light-emitting element can be either the first light-emitting element P1 or the second light-emitting element P2, or the third light-emitting element P3.

[0086] In some embodiments, the color of the emitted light from the first light-emitting element P1 can be set to be the same as the color of the emitted light from the second light-emitting element P2. As described above, the display panel 100 has different display areas, and the light-emitting elements 20 of the same color in different display areas may have different areas. In this case, the same light-emitting elements 20 located in different display areas can be set as the first light-emitting element P1 and the second light-emitting element P2, respectively. For example, the display panel 100 has a normal display area and a special function area. For the same color light-emitting element 20, the light-emitting element 20 of that color in the normal display area has a different area than the light-emitting element 20 of the same color in the special function area.

[0087] Based on the above-described display panel embodiments, another embodiment of this application also provides a display device, which can perform as follows: Figure 10 As shown.

[0088] refer to Figure 10 As shown, Figure 10 This is a schematic diagram of a display device provided in an embodiment of the present application. The display device includes the display panel 100 described in any of the above embodiments.

[0089] In this embodiment, the display device can be a mobile phone, tablet computer, wearable device, or other electronic device with display function. The display device uses the display panel 100 from the above embodiments. Different bias adjustment signals are used to adjust the bias of different driving transistors for different bias states, enabling more targeted and effective adjustment of the bias states of different driving transistors. This ensures that light-emitting elements of different areas have a more consistent brightness when displaying the same brightness.

[0090] The various embodiments in this specification are described in a progressive, parallel, or combined manner. Each embodiment focuses on its differences from other embodiments, and similar or identical parts between embodiments can be referred to interchangeably. For the display devices disclosed in the embodiments, since they correspond to the display panels disclosed in the embodiments, the description is relatively simple, and relevant parts can be referred to the description of the display panel.

[0091] It should be noted that, in the description of this application, the accompanying drawings and embodiments are illustrative rather than restrictive. The same reference numerals throughout the embodiments identify the same structures. Additionally, for ease of understanding and description, the thicknesses of some layers, films, panels, regions, etc., may be exaggerated in the drawings. It is also understood that when an element such as a layer, film, region, or substrate is referred to as being "on" another element, the element may be directly on the other element or there may be intermediate elements. Furthermore, "on" means positioning an element on or below another element, but does not inherently mean positioning it above another element according to the direction of gravity.

[0092] The terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be a component positioned centrally in the middle.

[0093] It should also be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or apparatus comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the article or apparatus that includes the aforementioned element.

[0094] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A display panel, characterized in that, include: A light-emitting element, wherein the light-emitting element includes a first light-emitting element and a second light-emitting element; A pixel circuit, comprising a first pixel circuit and a second pixel circuit, wherein the first pixel circuit is connected to the first light-emitting element and the second pixel circuit is connected to the second light-emitting element; The pixel circuit receives a bias adjustment signal, which includes a first bias adjustment signal and a second bias adjustment signal. The first pixel circuit receives the first bias adjustment signal, and the second pixel circuit receives the second bias adjustment signal. The area of ​​the first light-emitting element is S1, and the area of ​​the second light-emitting element is S2; The voltage value of the first bias adjustment signal is V1, and the voltage value of the second bias adjustment signal is V2; wherein, (S1-S2)×(|V1|-|V2|)≠0; |S1-S2| / |S2|>|V1-V2| / |V2|.

2. The display panel according to claim 1, characterized in that, The pixel circuit includes a data writing module, a driving module, a compensation module, and a bias adjustment module; The driving module includes a driving transistor; The data writing module is connected to the first terminal of the driving transistor and is used to provide data signals to the driving transistor. The bias adjustment module is connected to the first or second terminal of the driving transistor and is used to provide the bias adjustment signal to the driving transistor; The compensation module is connected between the gate and the second electrode of the driving transistor.

3. The display panel according to claim 1, characterized in that, (S1-S2)×(|V1|-|V2|)>0.

4. The display panel according to claim 3, characterized in that, If S1 > S2, then |S1 / S2| > |V1 / V2|; or, If S1 < S2, then |S1 / S2| < |V1 / V2|.

5. The display panel according to claim 1, characterized in that, (S1-S2)×(|V1|-|V2|)<0.

6. The display panel according to claim 5, characterized in that, If S1 > S2, then |S1 / S2| > |V2 / V1|; or, If S1 < S2, then |S1 / S2| < |V2 / V1|.

7. The display panel according to claim 1, characterized in that, The first pixel circuit includes a first driving transistor, and the second pixel circuit includes a second driving transistor; The width-to-length ratio of the channel region of the first driving transistor is R1, and the width-to-length ratio of the channel region of the second driving transistor is R2; wherein, (R1-R2)×(|V1|-|V2|)≠0.

8. The display panel according to claim 7, characterized in that, (R1-R2)×(|V1|-|V2|)<0.

9. The display panel according to claim 8, characterized in that, If R1 > R2, then |R1 / R2| > |V2 / V1|; or, If R1 < R2, then |R1 / R2| < |V2 / V1|.

10. The display panel according to claim 7, characterized in that, (R1-R2)×(|V1|-|V2|)>0.

11. The display panel according to claim 10, characterized in that, If R1 > R2, then |R1 / R2| > |V1 / V2|; or, If R1 < R2, then |R1 / R2| < |V1 / V2|.

12. The display panel according to claim 1 or 7, characterized in that, The light-emitting element further includes a third light-emitting element; The pixel circuit further includes a third pixel circuit, which is connected to the third light-emitting element; The bias adjustment signal includes a third bias adjustment signal; The area of ​​the third light-emitting element is S3, and the voltage value of the third bias adjustment signal is V3; wherein, |V1-V2|>|V2-V3|≥0; and / or, |V1-V2 |>|V1-V3 |≥0.

13. The display panel according to claim 12, characterized in that, S1≠S2≠S3.

14. The display panel according to claim 12, characterized in that, |S1-S2|>|S1-S3|≥0; and / or, |S1-S2|>|S2-S3|≥0.

15. The display panel according to claim 12, characterized in that, |R1-R2|>|R1-R3|≥0; and / or, |R1-R2|>|R2-R3|≥0.

16. The display panel according to claim 1, characterized in that, The display panel includes a first bias adjustment signal line and a second bias adjustment signal line. The first bias adjustment signal line transmits a first bias adjustment signal, and the second bias adjustment signal line transmits a second bias adjustment signal.

17. The display panel according to claim 16, characterized in that, The first bias adjustment signal line and the second bias adjustment signal line extend in the same direction.

18. The display panel according to claim 16, characterized in that, The first bias adjustment signal line extends along a first direction, and the second bias adjustment signal line extends along a second direction, with the first direction intersecting the second direction.

19. The display panel according to claim 16, characterized in that, The display panel includes a first light-emitting element group and a second light-emitting element group; The first light-emitting element group includes N1 rows of the first light-emitting elements arranged along a first preset direction, where N1 ≥ 1; The second light-emitting element group includes N2 rows of second light-emitting elements arranged along the first preset direction, where N2 ≥ 1; wherein, The first pixel circuit connected to the N1 row of light-emitting elements in the first light-emitting element group is connected to the first bias adjustment signal line and receives the first bias adjustment signal; The second pixel circuit connected to the N2 row of light-emitting elements in the second light-emitting element group is connected to the second bias adjustment signal line and receives the second bias adjustment signal.

20. The display panel according to claim 19, characterized in that, Along the first preset direction, the first bias adjustment signal line and the second bias adjustment signal line are disposed in the row gap of the first light-emitting element in row N1 and / or the row gap of the second light-emitting element in row N2.

21. The display panel according to claim 20, characterized in that, Along the first preset direction, there is a spacing of M1 second bias adjustment signal lines between two adjacent first bias adjustment signal lines, and a spacing of M2 first bias adjustment signal lines between two adjacent second bias adjustment signal lines; wherein, M1≥1, and / or, M2≥1.

22. The display panel according to claim 1, characterized in that, The color of the light emitted by the first light-emitting element is different from the color of the light emitted by the second light-emitting element.

23. The display panel according to claim 1, characterized in that, The color of the light emitted by the first light-emitting element is the same as the color of the light emitted by the second light-emitting element.

24. A display device, characterized in that, Includes the display panel as described in any one of claims 1-23.

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