Display panel and display device

Abstract

The present application discloses a display panel and a display device, wherein the display panel includes a first display area and a second display area; a pixel circuit, the pixel circuit includes a first pixel circuit and a second pixel circuit, the first pixel circuit is used to provide a driving current for a light-emitting element in the first display area, and the second pixel circuit is used to provide a driving current for a light-emitting element in the second display area; the pixel circuit also includes a bias adjustment module, which is used to provide a bias adjustment signal for a driving transistor, in the first pixel circuit, the bias adjustment module is connected to a preset pole of the driving transistor, and in the second pixel circuit, the preset pole of the driving transistor is not connected to the bias adjustment module. The present application independently designs the bias adjustment modules of the first pixel circuit and the second pixel circuit, so as to better meet the display requirements of the first display area and the second display area.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a display panel and a display device including the display panel. Background Art

[0002] The pixel circuit is a key component in the display panel and plays an important role in providing driving current for the light-emitting elements of the display panel. At present, with the increasing number of integrated functions of the display panel, different areas of the display panel are often required to realize different functions. In order to match different functions, different pixel circuits are often required to be set in different display areas to meet the display requirements of different display areas.

[0003] Pixel circuits generally include transistors and capacitors, which receive various signals and play different roles under the control of various signals. In order to meet the display requirements of different display areas, components such as transistors and capacitors in pixel circuits, as well as the various signals they receive, often need to be designed differently. How to perform differentiated design to meet the functions of different display areas is one of the hot topics of research in this field. Summary of the invention

[0004] In view of this, the present invention provides a display panel and a display device, in which components of pixel circuits in different display areas of the display panel or received signals are designed differently to meet display requirements of different display areas.

[0005] On one hand, the present application provides a display panel, including:

[0006] a first display area and a second display area;

[0007] A pixel circuit, the pixel circuit comprising a first pixel circuit and a second pixel circuit, the first pixel circuit is used to provide a driving current for a light-emitting element in a first display area, and the second pixel circuit is used to provide a driving current for a light-emitting element in a second display area;

[0008] The pixel circuit includes a bias adjustment module for providing a bias adjustment signal for the driving transistor. In the first pixel circuit, the bias adjustment module is connected to a preset pole of the driving transistor, and in the second pixel circuit, the preset pole of the driving transistor is not connected to the bias adjustment module.

[0009] Another aspect of the present application provides a display device, comprising the above-mentioned display panel.

[0010] The display panel and display device provided by the present application, wherein the display panel includes a first display area and a second display area, a preset pole of a first pixel circuit for providing a driving current to a light-emitting element in the first display area is connected to a bias adjustment module, and a preset pole of a second pixel circuit for providing a driving current to a light-emitting element in the second display area is not connected to the bias adjustment module. Because the bias adjustment signal is a signal received by the pixel circuit for adjusting the bias state of the driving transistor, whether the bias adjustment signal is received, and from which pole the bias adjustment signal is input, etc., all affect the working process and structural setting of the pixel circuit, and if the first display area and the second display area in the display panel have different requirements for the setting position, structural layout, etc. of the pixel circuit in order to realize different functions, then the position of the bias adjustment module in the first pixel circuit and the second pixel circuit, and whether the bias adjustment module is set, etc., are independently designed, so as to better meet the display requirements of the first display area and the second display area. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a schematic diagram of a display panel provided in an embodiment of the present application;

[0012] Figure 2 is a comparative schematic diagram of a first pixel circuit and a second pixel circuit provided in an embodiment of the present application;

[0013] Figure 3 is a comparative schematic diagram of another first pixel circuit and a second pixel circuit provided in an embodiment of the present application;

[0014] Figure 4 is a comparative schematic diagram of another first pixel circuit and a second pixel circuit provided in an embodiment of the present application;

[0015] Figure 5 is a comparative schematic diagram of a first pixel circuit and a second pixel circuit provided in an embodiment of the present application;

[0016] Figure 6 is a comparative schematic diagram of another first pixel circuit and a second pixel circuit provided in an embodiment of the present application;

[0017] Figure 7 is a comparative schematic diagram of a first pixel circuit and a second pixel circuit provided in an embodiment of the present application;

[0018] Figure 8 is a comparative schematic diagram of another first pixel circuit and a second pixel circuit provided in an embodiment of the present application;

[0019] Fig. 9 is a comparative schematic diagram of a first pixel circuit and a second pixel circuit provided in an embodiment of the present application;

[0020] Fig.10 is a schematic diagram of another display panel provided in an embodiment of the present application;

[0021] Fig.11 is a schematic diagram of another display panel provided in an embodiment of the present application;

[0022] Fig.12 is a schematic diagram of another display panel provided in an embodiment of the present application;

[0023] Fig.13 It is a schematic diagram of a display device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0025] It should be noted that specific details are described in the following description to facilitate a full understanding of the present invention. However, the present invention can be implemented in a variety of other ways different from those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0026] One aspect of the present application provides a display panel, which may be an organic light emitting diode display panel, a micro light emitting diode display panel, or other types of display panels.

[0027] refer to Figure 1-Figure 9 , Figure 1 is a schematic diagram of a display panel provided in an embodiment of the present application, Figure 2 is a schematic diagram comparing a first pixel circuit and a second pixel circuit provided in an embodiment of the present application, Figure 3 is a schematic diagram comparing another first pixel circuit and a second pixel circuit provided in an embodiment of the present application, Figure 4 is a comparative schematic diagram of another first pixel circuit and a second pixel circuit provided in an embodiment of the present application, Figure 5 is a comparative schematic diagram of a first pixel circuit and a second pixel circuit provided in an embodiment of the present application. Figure 6 is a comparative schematic diagram of another first pixel circuit and a second pixel circuit provided in an embodiment of the present application, Figure 7 is a comparative schematic diagram of a first pixel circuit and a second pixel circuit provided in an embodiment of the present application. Figure 8 is a comparative schematic diagram of another first pixel circuit and a second pixel circuit provided in an embodiment of the present application, Fig. 91 is a comparative schematic diagram of another first pixel circuit and a second pixel circuit provided in an embodiment of the present application. The display panel 100 includes a first display area 101 and a second display area 102; a pixel circuit 10, the pixel circuit 10 includes a data writing module 11, a driving module 12 and a compensation module 13; the driving module 12 includes a driving transistor T2, the driving transistor T2 is used to provide a driving current for the light-emitting element 20 of the display panel 100; the data writing module 11 is connected to the first electrode (i.e., the N2 node) of the driving transistor T2, and is used to provide a data signal to the driving transistor T2; the compensation module 13 is connected between the gate (i.e., the N1 node) and the second electrode (i.e., the N3 node) of the driving transistor T2, and is used to compensate for the driving transistor T2. 2; wherein the pixel circuit 10 includes a first pixel circuit 110 and a second pixel circuit 120, the first pixel circuit 110 is used to provide a driving current for the light-emitting element of the first display area 101, and the second pixel circuit 120 is used to provide a driving current for the light-emitting element of the second display area 102; the pixel circuit 10 also includes a bias adjustment module 14, which is used to provide a bias adjustment signal for the driving transistor T2, in the first pixel circuit 110, the bias adjustment module 14 is connected to the preset electrode 200 of the driving transistor T2, and in the second pixel circuit 120, the preset electrode 200 of the driving transistor T2 is not connected to the bias adjustment module 14.

[0028] It can be seen from the above description that the display panel 100 provided in the present application includes a first display area 101 and a second display area 102, and the preset pole 200 of the first pixel circuit 110 for providing a driving current for the light-emitting element of the first display area 101 is connected to the bias adjustment module 14, and the preset pole 200 of the second pixel circuit 120 for providing a driving current for the light-emitting element of the second display area 102 is not connected to the bias adjustment module 14. Because the bias adjustment signal is a signal received by the pixel circuit 10 for adjusting the bias state of the driving transistor, whether the bias adjustment signal is received and from which pole the bias adjustment signal is input all affect the working process and structural setting of the pixel circuit 10. If the first display area 101 and the second display area 102 in the display panel 100 have different requirements for the setting position, structural layout, size of the bias adjustment signal, etc. of the pixel circuit in order to achieve different functions, then the position of the bias adjustment module in the first pixel circuit 110 and the second pixel circuit 120, as well as whether the bias adjustment module is set, are designed independently, so as to better meet the display requirements of the first display area 101 and the second display area 102.

[0029] It should be noted that if Figure 2-Figure 9As shown, in this embodiment, the pixel circuit 10 may further include a reset module 15 for providing a reset signal Vref for the gate of the driving transistor T2; an initialization module 16 for providing an initialization signal Vini for the light-emitting element 20; and a light-emitting control module 17 for selectively allowing the light-emitting element 20 to enter a 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 pole of the driving transistor T2, and the second light-emitting control module 172 is connected between the other pole of the driving transistor T2 and the light-emitting element 20.

[0030] Optionally, in this embodiment, the control end of the data writing module 11 receives a first scanning signal, and the first scanning signal S1 controls the opening and closing of the data writing module 11; the control end of the compensation module 13 receives a second scanning signal S2, and the second scanning signal S2 controls the opening and closing of the compensation module 13; the control end of the bias adjustment module 14 receives a bias adjustment control signal SV, and the bias adjustment control signal SV controls the opening and closing of the bias adjustment module 14; the control end of the reset module 15 receives a third scanning signal S3, and the third scanning signal S3 controls the opening and closing of the reset module 15; the control end of the initialization module 16 receives a fourth scanning signal S4, and the fourth scanning signal S4 controls the opening and closing of the initialization module 16; the control end of the light-emitting control module 17 receives a light-emitting control signal EM, and the light-emitting control signal EM controls the opening and closing of the light-emitting control module 17.

[0031] In addition, optionally, in the present embodiment, the data writing module 11 includes a data writing transistor T1, and the first scanning signal S1 controls the turning on and off of the data writing transistor T1; the compensation module 13 includes a compensation transistor T3, and the second scanning signal S2 controls the turning on and off of the compensation transistor T3; the bias adjustment module 14 includes a bias adjustment transistor T4, and the 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 the third scanning signal S3 controls the turning on and off of the reset transistor T5; the initialization module 16 includes an initialization transistor T6, and the fourth scanning signal S4 controls the turning on and off of the initialization transistor T6; the first light-emitting control module 171 includes a first light-emitting control transistor T7, and the second light-emitting control module 172 includes a second light-emitting control transistor T8, and the light-emitting control signal EM controls the turning on and off of the first light-emitting control transistor T7 and the second light-emitting control transistor T8.

[0032] Among them, the first scanning signal S1, the second scanning signal S2, the third scanning signal S3, the fourth scanning signal S4, the bias adjustment control signal SV, the light emitting control signal EM and other signals, at least two of which 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 scanning signal S4 can be the same signal.

[0033] Optional, such as Figure 2-Figure 5 As shown, in this embodiment, the preset electrode 200 is the first electrode or the second electrode of the driving transistor T2. In the first pixel circuit 110, the bias adjustment module 14 is connected to the preset electrode of the driving transistor T2. In the second pixel circuit 120, the first electrode (N2 node) and the second electrode (N3 node) of the driving transistor T2 are not connected to the bias adjustment module 14.

[0034] In this embodiment, when the display requirements of the first display area 101 and the second display area 102 are different, for example, the first display area 101 requires a good display effect when the high-frequency data is refreshed and the low-frequency data is refreshed, and the second display area 102 includes a transparent area, requiring the space occupied by the pixel circuit to be as small as possible. The display requirements of the two areas are different, so that the requirements of the two areas for bias state adjustment are also different. For the first display area 101, a bias adjustment module 14 is set to provide a bias adjustment signal for the driving transistor T2 to adjust the bias state of the driving transistor T2 to avoid flickering problems on the display panel, especially flickering problems that may occur when the low-frequency data is refreshed. For the second display area 102, the bias adjustment module 14 is not set, thereby saving the space occupied by each component in the pixel circuit 10, and facilitating the second display area 102 to set the transparent area to realize other functions, such as the under-screen camera function. This part will be further explained later.

[0035] like Figure 2 and Figure 3 As shown, the driving transistor T2 is a PMOS transistor. In the first pixel circuit 110, the bias adjustment module 14 is connected to the first electrode (N2 node) or the second electrode (N3 node) of the driving transistor T2. In the second pixel circuit 120, neither the first electrode nor the second electrode of the driving transistor T2 is connected to the bias adjustment module 14. Figure 2 In the embodiment, the bias adjustment module 14 is connected to the first electrode (node ​​N2) of the driving transistor T2. Figure 3 In the embodiment, the bias adjustment module 14 is connected to the second electrode (node ​​N3 ) of the driving transistor T2 .

[0036] like Figure 4 and Figure 5As shown, the driving transistor T2 is an NMOS transistor. In the first pixel circuit 110, the bias adjustment module 14 is connected to the first electrode (N2 node) or the second electrode (N3 node) of the driving transistor T2. In the second pixel circuit 120, neither the first electrode nor the second electrode of the driving transistor T2 is connected to the bias adjustment module 14. Figure 4 In the embodiment, the bias adjustment module 14 is connected to the first electrode (node ​​N2) of the driving transistor T2. Figure 5 In the embodiment, the bias adjustment module 14 is connected to the second electrode (node ​​N3 ) of the driving transistor T2 .

[0037] Optionally, in this embodiment, if Figure 6 and Figure 8 As shown, the preset electrode 200 is the first electrode (node ​​N2) of the driving transistor T2, and in the second pixel circuit 120, the bias adjustment module 14 is connected to the second electrode (node ​​N3) of the driving transistor T2. Figure 6 As shown, the driving transistor T2 is a PMOS transistor. Figure 8 As shown, the driving transistor T2 is an NMOS transistor. Figure 7 and Fig. 9 As shown, the preset electrode 200 is the second electrode (node ​​N3) of the driving transistor T2, and in the second pixel circuit 120, the bias adjustment module 14 is connected to the first electrode (node ​​N2) of the driving transistor T2. Figure 7 As shown, the driving transistor T2 is a PMOS transistor. Figure 8 As shown, the driving transistor T2 is an NMOS transistor.

[0038] It should be noted that if Figure 2 , Figure 3 , Figure 6 , Figure 7 As shown, when the driving transistor T2 is a PMOS transistor, the pixel circuit 10 further includes a storage capacitor C1, a first electrode of the storage capacitor C1 is connected to the first power signal terminal, and a second electrode is connected to the gate of the driving transistor T2, for storing the signal transmitted to the gate of the driving transistor T2. Figure 4 , Figure 5 , Figure 8 , Fig. 9 As shown, when the driving transistor T2 is an NMOS transistor, the pixel circuit 10 further includes a storage capacitor C1, a first electrode of the storage capacitor C1 is connected to the light emitting element 20, and a second electrode is connected to the gate of the driving transistor T2, for storing a signal transmitted to the gate of the driving transistor T2.

[0039] refer to Fig.10 , Fig.101 is a schematic diagram of another display panel provided by an embodiment of the present application, wherein in the first display area 101, one of the first electrode 201 (N2 node) and the second electrode 202 (N3 node) of the driving transistor T2 in the first pixel circuit 110 is connected to the bias adjustment module 14, and in the second display area 102, the other of the first electrode 201 (N2 node) and the second electrode 202 (N3 node) of the driving transistor T2 in the second pixel circuit 120 is connected to the bias adjustment module 14. Optionally, the display panel 100 includes a bias adjustment signal line 300 for transmitting a bias adjustment signal; the bias adjustment signal line 300 extends along a first direction X, the first pixel circuit 110 and the second pixel circuit 120 are respectively located on both sides of the bias adjustment signal line 300, and the bias adjustment signal line 300 provides a bias adjustment signal to the first pixel circuit 110 and the second pixel circuit 120 at the same time.

[0040] In the above design, in the first pixel circuit 110, the first electrode 201 of the driving transistor T2 is closer to the bias adjustment signal line 300, and in the second pixel circuit 120, the second electrode 202 of the driving transistor T2 is closer to the bias adjustment signal line 300. In this way, the first display area 101 and the second display area 102 can be alternately arranged in the panel, and a bias adjustment signal is provided to a row of first pixel circuits 110 and a row of second pixel circuits 120 through a bias adjustment signal line 300. Therefore, the number of bias adjustment signal lines in the display panel can be reduced by half, which can greatly save the wiring space of the display panel.

[0041] refer to Fig.11 , Fig.11 This is a schematic diagram of another display panel provided in an embodiment of the present application, wherein in the first pixel circuit 110, the preset electrode of the driving transistor T2 is connected to the bias adjustment module 14, and in the second pixel circuit 120, the preset electrode of the driving transistor T2 is connected to the virtual bias adjustment module 18, and the virtual bias adjustment module 18 does not provide a bias adjustment signal for the driving transistor T2.

[0042] Because the first display area 101 and the second display area 102 are located on the same display panel, from the perspective of simplifying the process, the first pixel circuit 110 of the first display area 101 and the second pixel circuit 120 of the second display area 102 are prepared by the same process, and the process is relatively simple. From this perspective, the overall structure of the first pixel circuit 110 and the second pixel circuit 120 can be the same, and they are prepared by the same process. However, because the first pixel circuit 110 and the second pixel circuit 120 can meet the different display requirements of the first display area 101 and the second display area 102, the first pixel circuit 110 can receive a bias adjustment signal, and the second pixel circuit 120 may not receive a bias adjustment signal. At this time, the second pixel circuit 120 can be connected to a virtual bias adjustment module 18, and the overall structure of the virtual bias adjustment module 18 can be the same as that of the bias adjustment module 14, so that the first pixel circuit 110 and the second pixel circuit 120 can be prepared by one process, but the virtual bias adjustment module 18 may not provide a bias adjustment signal for the second pixel circuit 120. In some cases, the virtual bias adjustment module 18 is not connected to the bias adjustment signal line and does not receive the bias adjustment signal. In other cases, the control end of the virtual bias adjustment module 18 does not receive the control signal, the virtual bias adjustment module 18 is not turned on, etc. In this way, the first pixel circuit 110 and the second pixel circuit 120 can be manufactured by the same process, and the bias states of the first pixel circuit 110 and the second pixel circuit 120 can be adjusted independently.

[0043] Optionally, in this embodiment, the first display area 101 includes a light emitting element emitting light of a first color, and the second display area 102 includes a light emitting element emitting light of a second color, and the first color and the second color are different colors.

[0044] Because the turn-on voltages of light-emitting elements of different colors in the display panel are often different, and the driving currents required to achieve the same luminous brightness are also different, the settings of the driving transistors of the pixel circuits corresponding to light-emitting elements of different colors are often different. For example, the aspect ratios of the driving transistors are different, and the aspect ratio of the driving transistor is also one of the factors that affect the bias state of the driving transistor. Therefore, for driving transistors with different aspect ratios, pixel circuits with different bias conditions can be selected.

[0045] Optionally, in this embodiment, the wavelength of the first color light is λ1, and the wavelength of the second color light is λ2, wherein λ1<λ2.

[0046] Generally, in a display panel, the smaller the wavelength of the light-emitting color of the light-emitting element is, the higher its energy is, and the larger the turn-on voltage and driving current are generally required, so the bias state of the driving transistor may be more serious. Therefore, a first pixel circuit 110 may be set for the light-emitting element of the first color light, which includes a bias adjustment module 14, and a second pixel circuit 120 may be set for the light-emitting element of the second color light, which may not include the bias adjustment module 14; or, a first pixel circuit 110 may be set for the light-emitting element of the first color light, wherein the bias adjustment module is connected to one of the first pole or the second pole, and a second pixel circuit 120 may be set for the light-emitting element of the second color light, wherein the bias adjustment module is connected to the other of the first pole or the second pole. Of course, in some other cases, when conditions permit, λ1>λ2 may also be set, depending on the specific situation.

[0047] refer to Fig.12 , Fig.12 1 is a schematic diagram of another display panel provided by an embodiment of the present application, wherein the second display area 102 includes a transmission area 500, and the working process of the second display area 102 includes a light transmission stage, and at least in the light transmission stage, the transmission area 500 allows light to pass through the display panel. In the present application, the camera device is arranged below the second display area 102 of the display panel, and the transmission area 500 is arranged in the second display area 102. When the camera function needs to be turned on, the camera obtains external light through the transmission area 500. When the camera function is turned off, the second display area 102 can display normally, thereby realizing full-screen display.

[0048] In addition, the second display area 102 also includes a transition area 103, and the transition area 103 is located between the first display area 101 and the transmission area 500. The second pixel circuit 120 is located in the transition area 103. Because the second display area 102 includes the transmission area, in order to fully ensure the area of ​​the transmission area, the transition area 103 is set, and the second pixel circuit 120 is set in the transition area 103 to fully ensure the area of ​​the transmission area, thereby ensuring the camera function of the second display area 102.

[0049] Optionally, in the first display area 101, a first pixel circuit 110 provides driving current for m1 light-emitting elements, and in the second display area 102, a second pixel circuit 120 provides driving current for m2 light-emitting elements; wherein m1≥1, m2≥1, and m1<m2.

[0050] As described above, when the second display area 102 includes the transmission area 500, in order to fully ensure the area of ​​the transmission area 500, the number and area of ​​the second pixel circuit 120 need to be designed to be small enough. In some cases, the number of light-emitting elements driven by the second pixel circuit 120 can be set to be greater than the number of light-emitting elements driven by the first pixel circuit 110, thereby saving the area occupied by the second pixel circuit. Because the number of light-emitting elements of the pixel circuit driven by the first pixel circuit 110 and the second pixel circuit 120 is different, the magnitude of the driving current generated by the driving transistor of the pixel circuit is also different, resulting in different bias states of the driving transistor, so that the bias states can be adjusted for the first pixel circuit 110 and the second pixel circuit 120 respectively.

[0051] In some cases, the first pixel circuit 110 may include a bias adjustment module 14 for providing a bias adjustment signal, while the second pixel circuit 120 may not include the bias adjustment module 14. In this way, the area occupied by the second pixel circuit 120 can be further reduced. Moreover, after the second pixel circuit 120 is not provided with the bias adjustment module 14, the bias adjustment signal line does not need to be connected to the second display area 102. In this way, the wiring space in the second display area 102 is saved, and there is no need to connect the bias adjustment signal bus from the frame of the display panel to the second display area 102. In this way, the frame area is also saved. Therefore, in this case, the space occupied by the second pixel circuit 120 and related wiring is fully reduced, and sufficient space is reserved for the transparent area 500 of the second display area 102.

[0052] In other cases, one of the first electrode and the second electrode of the driving transistor of the first pixel circuit 110 is connected to the bias adjustment module 14, and the other of the first electrode and the second electrode of the driving transistor of the second pixel circuit 120 is connected to the bias adjustment module 14. Because after the structure of the pixel circuit is fixed, which electrode of the driving transistor is connected to the bias adjustment module 14 may affect the occupied area of ​​the pixel circuit. Since the first display area 101 does not include the transparent area 500, a connection method that is conducive to fully ensuring the bias effect can be selected to connect the bias adjustment module 14. Since the second display area 102 includes the transparent area 500, a connection method that is conducive to reducing the area of ​​the second pixel circuit 120 can be selected to connect the bias adjustment module 14. In this way, the functional requirements of the first display area 101 and the second display area 102 can be fully guaranteed.

[0053] In addition, optionally, in this embodiment, the first pixel circuit 110 includes a first driving transistor, the second pixel circuit 120 includes a second driving transistor, the width-to-length ratio of the first driving transistor is R1, and the width-to-length ratio of the second driving transistor is R2, wherein R1<R2.

[0054] As described above, the number of light-emitting elements driven by the first pixel circuit 110 is less than the number of light-emitting elements driven by the second pixel circuit 120. Therefore, when the brightness of the light-emitting elements reaches the same level, the driving current generated in the second pixel circuit 120 is greater than the driving current generated in the first pixel circuit 110. In order to ensure the ability of the second pixel circuit 120 to generate driving current, the width-to-length ratio of the driving transistor in the second pixel circuit 120 is set to be larger. The larger the width-to-length ratio, the stronger the driving capability, thereby fully ensuring the display effect of the second display area 102.

[0055] Optionally, in this embodiment, in at least one stage of operation of the display panel 100 , the data refresh frequency in the first display area 101 is F1 , and the data refresh frequency in the second display area 102 is F2 , wherein F1 < F2 .

[0056] As display panels integrate more and more functions, different areas in the display panel are often required to assume different display functions. For example, some areas are used to display game or film and television pages, and some areas are used to display text, time information and other pages. Different display requirements have different requirements for data refresh frequency. For areas that display game or film and television pages, a higher data refresh frequency is generally required. For pages that display text, time information, etc., a lower data refresh frequency is generally sufficient to meet the demand, thereby saving power consumption. The bias problem of the driving transistor is mainly caused by the reverse electric field appearing in the voltage difference between the gate, source and drain of the driving transistor during the light-emitting stage. When the pixel circuit is displayed in a low-frequency state, the voltage between the gate, source and drain will remain in a state for a long time. If a reverse electric field appears, the bias problem caused by the reverse electric field will be more serious. Therefore, when F1<F2, the preset electrode 200 of the driving transistor of the first pixel circuit 110 can be set to be connected to the bias adjustment module 14, while the preset electrode 200 of the driving transistor of the second pixel circuit 120 is not connected to the bias adjustment module 14, so that bias adjustment is only performed on the area where low-frequency data is refreshed, while bias adjustment is not performed on the area where high-frequency data is refreshed. In this way, the power consumption and space of the panel are saved, and the bias adjustment is performed on the low-frequency area.

[0057] Another aspect of the present application provides a display device, comprising the display panel in any of the above embodiments.

[0058] refer to Fig.13 , Fig.13 It is a schematic diagram of a display device provided in an embodiment of the present application, wherein the display device 400 includes a display panel 100, and the display panel 100 is the display panel in any of the aforementioned embodiments. The display device can be a mobile phone, a television, a laptop computer, a flat-panel display device, a smart wearable display device, etc., and the present application does not make any special limitations.

[0059] Optionally, when the display device provided in the present application is a display device with an under-screen camera, the second display area 102 includes a transmission area 500, and the working process of the second display area 102 includes a light transmission stage, at least in the light transmission stage, the transmission area 500 allows light to pass through the display panel; the display device 400 includes a functional device, and the functional device is arranged corresponding to the transmission area 500 of the second display area 102. In the light transmission stage, the functional device can emit and receive light through the transmission area. Optionally, the functional device is a camera. As mentioned above, by arranging the camera below the display area with the transmission area, the full-screen function can be realized.

[0060] From the above description, it can be seen that the display panel and display device provided by the present application, wherein the display panel 100 includes a first display area 101 and a second display area 102, a preset pole of the first pixel circuit 110 for providing a driving current to the light-emitting element of the first display area 101 is connected to the bias adjustment module 14, and a preset pole of the second pixel circuit 120 for providing a driving current to the light-emitting element of the second display area 102 is not connected to the bias adjustment module 14. Because the bias adjustment signal is a signal received by the pixel circuit 10 for adjusting the bias state of the driving transistor, whether the bias adjustment signal is received and from which pole the bias adjustment signal is input all affect the working process and structural setting of the pixel circuit 10. If the first display area 101 and the second display area 102 in the display panel 100 are designed to achieve different functions, for example, the first display area 101 and the second display area 102 include different transmission areas, the width-to-length ratio of the driving transistor of the pixel circuit is different, the number of light-emitting elements driven by the pixel circuit is different, and in order to save the number of bias adjustment signal lines, the position of the bias adjustment module in the first pixel circuit 110 and the second pixel circuit 120, and whether the bias adjustment module is set, etc. are independently designed, so as to better meet the display requirements of the first display area 101 and the second display area 102.

[0061] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A display panel, characterized in that: include: a first display area and a second display area; A pixel circuit, the pixel circuit comprising a first pixel circuit and a second pixel circuit, the first pixel circuit being used to provide a driving current for the light-emitting element in the first display area, and the second pixel circuit being used to provide a driving current for the light-emitting element in the second display area; The first pixel circuit includes a bias adjustment module, which is used to provide a bias adjustment signal for the driving transistor. In the first pixel circuit, the bias adjustment module is connected to a preset electrode of the driving transistor, and in the second pixel circuit, the preset electrode of the driving transistor is not connected to the bias adjustment module. The pixel circuit includes a data writing module, a driving module and a compensation module; The driving module comprises a driving transistor, and the driving transistor is used to provide a driving current for the light-emitting element of the display panel; The data writing module is connected to the first electrode of the driving transistor and is used to provide a data signal to the driving transistor; The compensation module is connected between the gate and the second electrode of the driving transistor; The preset pole is the first pole or the second pole of the driving transistor, the second pixel circuit does not include a bias adjustment module, and the first pole and the second pole of the driving transistor of the second pixel circuit are not connected to the bias adjustment module; or The preset electrode is the first electrode of the driving transistor, and the second pixel circuit includes a bias adjustment module, and the bias adjustment module is connected to the second electrode of the driving transistor of the second pixel circuit; or, The preset electrode is the second electrode of the driving transistor, the second pixel circuit includes a bias adjustment module, and the bias adjustment module is connected to the first electrode of the driving transistor of the second pixel circuit; or, The preset pole is the first pole or the second pole of the driving transistor. The second pixel circuit includes a virtual bias adjustment module. The preset pole of the driving transistor of the second pixel circuit is connected to the virtual bias adjustment module. The virtual bias adjustment module does not provide the bias adjustment signal for the driving transistor.

2. The display panel according to claim 1, characterized in that: When the preset pole is the first pole of the driving transistor, the second pixel circuit includes a bias adjustment module, and the bias adjustment module is connected to the second pole of the driving transistor of the second pixel circuit; or when the preset pole is the second pole of the driving transistor, the second pixel circuit includes a bias adjustment module, and the bias adjustment module is connected to the first pole of the driving transistor of the second pixel circuit, The display panel comprises a bias adjustment signal line for transmitting the bias adjustment signal; The bias adjustment signal line extends along a first direction, the first pixel circuit and the second pixel circuit are respectively located on both sides of the bias adjustment signal line, and the bias adjustment signal line provides the bias adjustment signal to the first pixel circuit and the second pixel circuit at the same time.

3. The display panel according to claim 1, characterized in that: The first display area includes a light emitting element emitting light of a first color, and the second display area includes a light emitting element emitting light of a second color, and the first color and the second color are different colors.

4. The display panel according to claim 3, characterized in that: The wavelength of the first color light is λ1, and the wavelength of the second color light is λ2, wherein λ1<λ2.

5. The display panel according to claim 1, characterized in that: When the preset pole is the first pole or the second pole of the driving transistor, the second pixel circuit does not include a bias adjustment module, and the first pole and the second pole of the driving transistor of the second pixel circuit are not connected to the bias adjustment module; or, the preset pole is the first pole of the driving transistor, the second pixel circuit includes a bias adjustment module, and the bias adjustment module is connected to the second pole of the driving transistor of the second pixel circuit; or, the preset pole is the second pole of the driving transistor, the second pixel circuit includes a bias adjustment module, and the bias adjustment module is connected to the first pole of the driving transistor of the second pixel circuit, The second display area includes a transmission area, and the operation process of the second display area includes a light transmission stage. At least in the light transmission stage, the transmission area allows light to pass through the display panel.

6. The display panel according to claim 5, characterized in that: The second display area further includes a transition area, the transition area is located between the first display area and the transmission area, and the second pixel circuit is located in the transition area.

7. The display panel according to claim 1, characterized in that: When the preset pole is the first pole or the second pole of the driving transistor, the second pixel circuit does not include a bias adjustment module, and the first pole and the second pole of the driving transistor of the second pixel circuit are not connected to the bias adjustment module; or, the preset pole is the first pole of the driving transistor, the second pixel circuit includes a bias adjustment module, and the bias adjustment module is connected to the second pole of the driving transistor of the second pixel circuit; or, the preset pole is the second pole of the driving transistor, the second pixel circuit includes a bias adjustment module, and the bias adjustment module is connected to the first pole of the driving transistor of the second pixel circuit, In the first display area, the first pixel circuit provides driving current for m1 light-emitting elements, and in the second display area, the second pixel circuit provides driving current for m2 light-emitting elements; wherein, m1≥1, m2≥1, and m1<m2.

8. The display panel according to claim 7, characterized in that: m1=1, m2=2 or m2=3 or m2=4.

9. 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 first driving transistor is R1, and the width-to-length ratio of the second driving transistor is R2, wherein R1<R2.

10. The display panel according to claim 1, characterized in that: When the preset pole is the first pole or the second pole of the driving transistor, the second pixel circuit does not include a bias adjustment module, and the first pole and the second pole of the driving transistor of the second pixel circuit are not connected to the bias adjustment module, In at least one stage of operation of the display panel, a data refresh frequency in the first display area is F1, and a data refresh frequency in the second display area is F2, wherein F1<F2.

11. A display device, characterized in that: A display panel comprising any one of claims 1 to 10.

12. The display device according to claim 11, characterized in that: The second display area includes a transmission area, and the operation process of the second display area includes a light transmission stage. At least in the light transmission stage, the transmission area allows light to pass through the display panel; The display device includes a functional device, and the functional device is arranged corresponding to the transmission area of ​​the display panel. In the light transmission stage, the functional device can emit and receive light through the transmission area.

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