Display panel and electronic device

Abstract

The application discloses a display panel and electronic equipment, and belongs to the technical field of display. The display panel comprises a load compensation circuit and a pixel circuit, and the pixel circuit comprises a light emitting element. The load compensation circuit comprises a first capacitor, a first switch tube and a first switch circuit. The first end of the first capacitor is electrically connected with the cathode of the light emitting element. The second end of the first capacitor is connected with a first voltage signal through the first switch circuit. The control end and the first end of the first switch tube are electrically connected with the second end of the first capacitor. The second end of the first switch tube is electrically connected with the first end of the first capacitor. In the case that the first switch circuit controls the second end of the first capacitor to be conductive and connected with the first voltage signal, the first voltage signal is used for charging the first end of the first switch tube and the first capacitor. The anode of the light emitting element is used for being connected with the first voltage signal, and the first voltage signal is used for initializing the anode potential of the light emitting element.

Description

Technical Field

[0001] This application belongs to the field of display technology, specifically relating to a display panel and an electronic device. Background Technology

[0002] In the 8T1C pixel circuit of the related technology, the two thin film transistors (TFTs) T7 and T8 are controlled by the same signal, which causes the anode initialization frequency of the organic light-emitting diode (OLED) to be too high. This results in differences in the degree of anode initialization of the OLED at different time periods, which in turn makes the screen prone to splitting problems during the display process. Summary of the Invention

[0003] This application aims to provide a display panel and electronic device that can solve the screen splitting problem in related technologies.

[0004] To solve the above-mentioned technical problems, this application is implemented as follows:

[0005] In a first aspect, embodiments of this application provide a display panel, characterized in that it includes: a load compensation circuit and a pixel circuit, wherein the pixel circuit includes a light-emitting element;

[0006] The load compensation circuit includes a first capacitor, a first switching transistor, and a first switching circuit. The first terminal of the first capacitor is electrically connected to the cathode of the light-emitting element. The second terminal of the first capacitor is connected to a first voltage signal through the first switching circuit. The control terminal and the first terminal of the first switching transistor are both electrically connected to the second terminal of the first capacitor. The second terminal of the first switching transistor is also electrically connected to the first terminal of the first capacitor.

[0007] When the first switching circuit controls the second terminal of the first capacitor to be turned on and connected to the first voltage signal, the first voltage signal is used to charge the first terminal of the first switching transistor and the first capacitor.

[0008] The anode of the light-emitting element is used to connect to the first voltage signal, and the first voltage signal is used to initialize the anode potential of the light-emitting element.

[0009] In a second aspect, embodiments of this application provide an electronic device including a display panel as described in the first aspect.

[0010] In the embodiments of this application, a load element consisting of a first capacitor and a first switching transistor is designed in the load compensation circuit so that the first terminal of the first switching transistor and the first capacitor can be charged using a first voltage signal. That is, the load element can be charged using the first voltage signal used to initialize the anode potential of the light-emitting element. The load size of the load element can be adjusted by controlling the charging time, thereby ensuring that the driving load of the display panel remains consistent during the display process, thus solving the problem of screen splitting that occurs during the display process.

[0011] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0012] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0013] Figure 1 This is one of the structural schematic diagrams of the load compensation circuit provided in the embodiments of this application;

[0014] Figure 2 This is a second schematic diagram of the load compensation circuit provided in the embodiments of this application;

[0015] Figure 3 This is a schematic diagram of the pixel circuit provided in the embodiments of this application.

[0016] Figure 4 This is a schematic diagram of the load before compensation provided in the embodiments of this application;

[0017] Figure 5 This is a schematic diagram of the compensated load provided in the embodiments of this application;

[0018] Figure 6 This is a schematic diagram of the structure of the first switching transistor provided in the embodiment of this application. Detailed Implementation

[0019] The embodiments of this application will now be described in detail. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0020] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise stated, "multiple" means two or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0021] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0022] The display panel provided in the embodiments of this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0023] See Figures 1 to 6 , Figure 1 This is one of the structural schematic diagrams of the load compensation circuit provided in the embodiments of this application; Figure 2 This is a second schematic diagram of the load compensation circuit provided in the embodiments of this application; Figure 3 This is a schematic diagram of the pixel circuit provided in the embodiments of this application. Figure 4 This is a schematic diagram of the load before compensation provided in the embodiments of this application; Figure 5 This is a schematic diagram of the compensated load provided in the embodiments of this application; Figure 6 This is a schematic diagram of the structure of the first switching transistor provided in the embodiment of this application.

[0024] like Figures 1 to 3 As shown, the display panel provided in this application embodiment includes a load compensation circuit 10 and a pixel circuit 20, wherein the pixel circuit 20 includes a light-emitting element 21;

[0025] The load compensation circuit 10 includes a first capacitor 11, a first switching transistor 12, and a first switching circuit 13. The first end of the first capacitor 11 is electrically connected to the cathode of the light-emitting element 21. The second end of the first capacitor 11 is connected to the first voltage signal 33 through the first switching circuit 13. The control end and the first end of the first switching transistor 12 are both electrically connected to the second end of the first capacitor 11. The second end of the first switching transistor 12 is electrically connected to the first end of the first capacitor.

[0026] When the first switching circuit 13 controls the second terminal of the first capacitor 11 to be turned on and connected to the first voltage signal 33, the first voltage signal 33 is used to charge the first terminal of the first switching transistor 12 and the first capacitor 11.

[0027] The anode of the light-emitting element 21 is used to connect to the first voltage signal 33, and the first voltage signal 33 is used to initialize the anode potential of the light-emitting element 21.

[0028] In this embodiment, the load element consisting of a first capacitor 11 and a first switching transistor 12 is designed in the load compensation circuit 10 so that the first terminal of the first switching transistor 12 and the first capacitor 11 can be charged by the first voltage signal 33. That is, the load element can be charged by the first voltage signal 33 used to initialize the anode potential of the light-emitting element 21. The load size of the load element can be adjusted by controlling the charging time, thereby keeping the driving load of the display panel consistent during the display process and solving the problem of screen splitting during the display process.

[0029] In one embodiment, the light-emitting element 21 may be an organic light-emitting diode, and the first switching circuit 13 may be a single switching transistor or a switching circuit composed of multiple switching transistors.

[0030] In one embodiment, the anode of the light-emitting element 21 can be connected to the pixel driving signal 31 via a switching circuit to realize the content display function of the display panel; the cathode of the light-emitting element 21 can be connected to the access point 32. The access point 32 can also be understood as a grounding point used to form a complete driving circuit with the pixel driving signal 31.

[0031] In one embodiment, the first switching circuit 13 includes a second switching transistor 131 and a first switching sub-circuit 132. The second end of the first capacitor 11 is connected to the first voltage signal 33 through the second switching transistor 131, and the second end of the first capacitor 11 is also connected to the pixel driving signal 31 through the first switching sub-circuit 132.

[0032] The first terminal of the second switch 131 is used to receive the first voltage signal 33, the second terminal of the second switch 131 is electrically connected to the second terminal of the first capacitor 11, and the control terminal of the second switch 131 is used to receive the first control signal 41.

[0033] When the second switch 131 is turned on, the first voltage signal 33 is used to charge the first terminal of the first switch 12 and the first capacitor 11.

[0034] In this embodiment, the second switch tube 131 can be turned on or off by the first control signal 41. When the second switch tube 131 is turned on, the first terminal of the first switch tube 12 and the first capacitor 11 are charged by the first voltage signal 33 to adjust the load of the load element, thereby ensuring that the driving load of the display panel remains consistent during the display process and solving the problem of screen splitting during the display process.

[0035] During content display, the display panel typically displays the content to be displayed through multiple display cycles, and each display cycle can include a first stage and a second stage that are set consecutively. Each display cycle can be understood as the display cycle of an image frame, which includes the display period of the image frame and the interval period before entering the next image frame. That is, the first stage mentioned above can be understood as the interval period between two consecutive image frames, and the second stage mentioned above can be understood as the display period of the image frame.

[0036] In existing technology, when the display panel switches from the second stage to the first stage, the overall load of the display panel decreases, resulting in a difference in the driving load and affecting the fixed-position lighting characteristics of the display panel, thus creating a split-screen phenomenon.

[0037] In this application, by designing a load element consisting of a first capacitor 11 and a first switching transistor 12 in the load compensation circuit 10, and when entering the first stage, controlling the second switching transistor 131 to be turned on by the first control signal 41, and charging the first terminal of the first switching transistor 12 and the first capacitor 11 by the first voltage signal 33, the load size of the load element can be adjusted by controlling the charging time, and the driving load of the display panel can be kept consistent in the first stage and the second stage, thus solving the problem of display splitting during the display process.

[0038] In one embodiment, the first switching sub-circuit 132 includes a third switching transistor 1321, a fourth switching transistor 1322, a fifth switching transistor 1323, a sixth switching transistor 1324, a seventh switching transistor 1325, an eighth switching transistor 1326, and a second capacitor 1327.

[0039] The first terminal of the third switch 1321 is electrically connected to the second terminal of the fourth switch 1322, the second terminal of the third switch 1321 is electrically connected to the first terminal of the fifth switch 1323, and the control terminal of the third switch 1321 is electrically connected to the second terminal of the second capacitor 1327.

[0040] The first terminal of the fourth switch 1322 is used to connect to the pixel drive signal 31, and the control terminal of the fourth switch 1322 is used to connect to the second control signal 42.

[0041] The second terminal of the fifth switch transistor 1323 is electrically connected to the second terminal of the first capacitor 11, and the control terminal of the fifth switch transistor 1323 is used to receive the second control signal 42.

[0042] The first terminal of the sixth switch transistor 1324 is used to connect to the second voltage signal 34, the second terminal of the sixth switch transistor 1324 is electrically connected to the first terminal of the third switch transistor 1321, and the control terminal of the sixth switch transistor 1324 is used to connect to the first control signal 41.

[0043] The first terminal of the seventh switch 1325 is electrically connected to the second terminal of the second capacitor 1327, the second terminal of the seventh switch 1325 is electrically connected to the second terminal of the third switch 1321, and the control terminal of the seventh switch 1325 is used to receive the third control signal 43.

[0044] The first terminal of the eighth switch 1326 is electrically connected to the second terminal of the second capacitor 1327. The second terminal of the eighth switch 1326 is used to connect to the third voltage signal 35. The control terminal of the eighth switch 1326 is used to connect to the fourth control signal 44.

[0045] The first terminal of the second capacitor 1327 is used to connect the pixel driving signal 31, and the second terminal of the second capacitor 1327 is used to connect the third voltage signal 35.

[0046] The pixel circuit 20 includes a third capacitor 22. The first end of the third capacitor 22 is used to connect to the pixel driving signal 31, and the second end of the third capacitor 22 is used to connect to the third voltage signal 35. The third voltage signal 35 is used to initialize the third capacitor 22.

[0047] In one embodiment, the pixel circuit 20 includes a ninth switch 231, a tenth switch 232, an eleventh switch 233, a twelfth switch 234, a thirteenth switch 235, a fourteenth switch 236, a fifteenth switch 237, and a sixteenth switch 238.

[0048] The first terminal of the ninth switch 231 is electrically connected to the second terminal of the tenth switch 232, the second terminal of the ninth switch 231 is electrically connected to the first terminal of the eleventh switch 233, and the control terminal of the ninth switch 231 is electrically connected to the second terminal of the third capacitor 22.

[0049] The first terminal of the tenth switch 232 is used to connect to the pixel drive signal 31, and the control terminal of the tenth switch 232 is used to connect to the second control signal 42.

[0050] The second terminal of the eleventh switch 233 is electrically connected to the anode of the light-emitting element 21, and the control terminal of the eleventh switch 233 is used to receive the second control signal 42.

[0051] The first terminal of the twelfth switch 234 is used to connect to the second voltage signal 34, the second terminal of the twelfth switch 234 is electrically connected to the second terminal of the third capacitor 22, and the control terminal of the twelfth switch 234 is used to connect to the first control signal 41.

[0052] The first terminal of the thirteenth switch 235 is used to receive the first voltage signal 33, the second terminal of the thirteenth switch 235 is electrically connected to the anode of the light-emitting element 21, and the control terminal of the thirteenth switch 235 is used to receive the first control signal 41.

[0053] The first terminal of the fourteenth switch 236 is used to receive the pixel signal 36, the second terminal of the fourteenth switch 236 is electrically connected to the first terminal of the ninth switch 231, and the control terminal of the fourteenth switch 236 is used to receive the fifth control signal 45.

[0054] The first terminal of the fifteenth switch 237 is electrically connected to the second terminal of the third capacitor 22, the second terminal of the fifteenth switch 237 is electrically connected to the second terminal of the ninth switch 231, and the control terminal of the fifteenth switch 237 is used to receive the third control signal 43.

[0055] The first terminal of the sixteenth switch 238 is electrically connected to the second terminal of the third capacitor 22. The second terminal of the sixteenth switch 238 is connected to the third voltage signal 35. The control terminal of the sixteenth switch 238 is used to connect to the fourth control signal 44.

[0056] In one embodiment, the display panel has multiple display cycles, each display cycle including a first stage and a second stage set consecutively; the display panel is in a load compensation working mode:

[0057] In the first stage, the first control signal 41 controls the second switch 131, the sixth switch 1324, the twelfth switch 234 and the thirteenth switch 235 to be turned on, and the second control signal 42 controls the fourth switch 1322, the fifth switch 1323, the tenth switch 232 and the eleventh switch 233 to be turned off.

[0058] In the second stage, the first control signal 41 controls the second switch 131, the sixth switch 1324, the twelfth switch 234 and the thirteenth switch 235 to turn off, and the second control signal 42 controls the fourth switch 1322, the fifth switch 1323, the tenth switch 232 and the eleventh switch 233 to turn on.

[0059] In this embodiment, when the display panel is in load compensation mode and in the first stage described above, the second switch 131, the sixth switch 1324, the twelfth switch 234, and the thirteenth switch 235 are turned on by the first control signal, and the fourth switch 1322, the fifth switch 1323, the tenth switch 232, and the eleventh switch 233 are turned off by the second control signal 42. This allows the first voltage signal 33 to charge the first terminal of the first switch 12 and the first capacitor 11. The load size of the load element can be adjusted by controlling the charging time, and the driving load of the display panel can be kept consistent in the first and second stages, thus solving the problem of screen splitting during the display process.

[0060] In the second stage described above, the second switch 131, the sixth switch 1324, the twelfth switch 234 and the thirteenth switch 235 are turned off by the first control signal 41, and the fourth switch 1322, the fifth switch 1323, the tenth switch 232 and the eleventh switch 233 are turned on by the second control signal 42, so that the display panel can display image frames normally.

[0061] In one embodiment, when the display panel is in other operating modes:

[0062] In the first stage, the first control signal 41 controls the twelfth switch 234 and the thirteenth switch 235 to be turned on, and the second control signal 42 controls the tenth switch 232 and the eleventh switch 233 to be turned off.

[0063] In the second stage, the first control signal 41 controls the twelfth switch 234 and the thirteenth switch 235 to turn off, and the second control signal 42 controls the tenth switch 232 and the eleventh switch 233 to turn on.

[0064] The other working modes mentioned above can be understood as non-load compensation working modes.

[0065] In this embodiment, when the display panel is in other working modes, since the load is not dynamically adjusted, the driving load of the display panel in the first stage and the second stage can remain consistent, which makes the display panel prone to display split-screen problems during the display process.

[0066] In one embodiment, the first switch 12, the second switch 131, the third switch 1321, the fourth switch 1322, the fifth switch 1323, the sixth switch 1324, the seventh switch 1325, the eighth switch 1326, the ninth switch 231, the tenth switch 232, the eleventh switch 233, the twelfth switch 234, the thirteenth switch 235, the fourteenth switch 236, the fifteenth switch 237, and the sixteenth switch 238 are all thin-film transistors.

[0067] Among them, the seventh switch 1325, the eighth switch 1326, the fifteenth switch 237 and the sixteenth switch 238 can be N-channel thin film transistors; while the first switch 12, the second switch 131, the third switch 1321, the fourth switch 1322, the fifth switch 1323, the sixth switch 1324, the ninth switch 231, the tenth switch 232, the eleventh switch 233, the twelfth switch 234, the thirteenth switch 235 and the fourteenth switch 236 can be P-channel thin film transistors.

[0068] In one embodiment, the capacitance value of the first capacitor 11 is between the capacitance value of the second capacitor 1327 and the capacitance value of the pixel parasitic capacitance in the pixel circuit 20.

[0069] In one embodiment, the pixel circuit 20 may be an 8T1C pixel circuit, that is, the pixel circuit 20 includes 8 thin film transistors and a storage capacitor, which can be understood as the third capacitor 22 mentioned above.

[0070] The image display process of the pixel circuit 20 is explained in detail below:

[0071] Step 1: Control the sixteenth switch transistor 238 to conduct via the fourth control signal 44, raising the potential at point A to V. A That is, the third capacitor 22 can be charged by the third voltage signal 35 to achieve the initialization process of the third capacitor 22;

[0072] Specifically, the fourth control signal 44 can be set to a high potential so that the sixteenth switch 238 can be turned on.

[0073] Step 2: Control the fourteenth switch 236 to conduct via the fifth control signal 45, and control the fifteenth switch 237 to conduct via the third control signal 43, so that the source of the ninth switch 231 is short-circuited; at this time, the potential at point A is |V A |>|V th That is, at this time, the ninth switch 231 and the fifteenth switch 237 can form a diode, and the ninth switch 231 is turned on until the potential at point A becomes V. data -|Vth |Up to date, the primary purpose is to store V data and V th The voltage difference is for subsequent compensation.

[0074] The above V th This can be understood as the threshold voltage of the ninth switch 231, the aforementioned V data This can be understood as the output voltage of pixel signal 36.

[0075] Step 3: When the thirteenth switch 235 is turned on, the anode of the light-emitting element 21 is connected to the first voltage signal 33, and the cathode of the light-emitting element 21 is connected to the access point 32, forming a channel to initialize the anode of the light-emitting element 21 through the first voltage signal 33; at this time, the potential at point A = V data -|V th The anode potential of the light-emitting element 21 is the output voltage of the first voltage signal 33;

[0076] When the thirteenth switch 235 is turned on, the source of the ninth switch 231 is connected to the second voltage signal 34 so as to perform bias compensation on the ninth switch 231.

[0077] The thirteenth switch 235 and the twelfth switch 234 can be turned on by the first control signal 41.

[0078] Step 4: The tenth switch 232 and the eleventh switch 233 can be turned on by controlling the second control signal 42. At this time, the current Ids through the ninth switch 231 is (1 / 2)K[ELVDD-(V data -|V th |)-|V th |]^2=(1 / 2)K(Vdd-V data )^2, K=CoxμW / L; the current flows through the light-emitting element 21, the light-emitting element 21 starts to emit light, and maintains it for one frame;

[0079] The above ELVDD can be understood as the output voltage of pixel drive signal 31.

[0080] Step 5: Control the tenth switch transistor 232 and the eleventh switch transistor 233 to disconnect, and control the thirteenth switch transistor 235 to conduct, and execute the action of step 3 to realize the display process of pixel circuit 20.

[0081] Among them, the ninth switch 231 can be understood as the main driving transistor of the pixel circuit 20, and the fourteenth switch 236 can be understood as the control switch for the resource signal to enter the pixel signal.

[0082] The second control signal 42, the third control signal 43, the fourth control signal 44, and the fifth control signal 45 mentioned above can all be understood as gate switching signals of thin-film transistors.

[0083] In one embodiment, the display panel includes a display area and a non-display area, with pixel circuitry disposed in the display area and load compensation circuitry disposed in the non-display area.

[0084] In this embodiment, by placing the load compensation circuit in the non-display area, the problem of increased black borders caused by the placement of the load compensation circuit can be reduced.

[0085] The aforementioned display area can be understood as the effective pixel area (Active Area, AA) of the display panel, and the aforementioned non-display area can be understood as the non-AA area of ​​the display panel.

[0086] In one embodiment, a load compensation circuit 10 can be designed in the non-display area. The load compensation circuit 10 can be arranged in the form of a load compensation array in the non-display area. The load compensation circuit 10 does not include light-emitting pixels and is only used to compensate for the load. The load level can be configured through the first switching circuit 13. In the case of display panel splitting problem, by configuring a matching load, the driving load of the display panel can be kept consistent at any time period. Especially when the display panel switches from the second stage to the first stage, the driving load of the display panel can be kept consistent, thereby solving the display splitting problem caused by load change.

[0087] In one embodiment, when the load compensation circuit 10 is designed in the non-display area, the load compensation circuit has a load configuration function and can configure a suitable load by selecting different conduction arrays; in this way, when entering the first stage, the overall driving load of the display panel does not change abruptly by loading the load capacitor, that is, loading the first capacitor 11, thereby improving the problem of the interval black stripes in the display panel during the display process.

[0088] like Figure 4 and Figure 5 As shown, the second voltage signal 34 (Vbias) is mainly used to compensate for brightness decay and reduce the hysteresis stress of the third switch 1321. When the pixel circuit 20 is driven, that is, in the second stage mentioned above, the second voltage signal 34 is applied to the source of the third switch 1321. When it is passed into the non-display area step by step, the overall load corresponding to the second voltage signal 34 becomes lighter. Due to the difference in driving load, it has different effects on the fixed position characteristics of the display panel, resulting in a split screen phenomenon.

[0089] In this application, a simulated load capacitor and a simulated load switch are designed at the position of the light-emitting element 21 in the pixel circuit 20, that is, a first capacitor 11 and a first switch 12 are designed. The load element composed of the first capacitor 11 and the first switch 12 can adjust the driving load of the display panel when it enters the first stage, so that the driving load corresponding to the second voltage signal 34 after the display panel enters the first stage is consistent with the driving load corresponding to the second voltage signal 34 before the display panel enters the first stage, thus solving the problem of screen splitting during the display process.

[0090] Specifically, the first control signal 41 output by the display panel can be used to control the second switch 131 and the sixth switch 1324 to be turned on, so that the first terminal (source) of the first switch 12 and the first capacitor 11 are charged by the first voltage signal 33, and the first terminal (source) of the sixth switch 1324 is charged by the second voltage signal 34, thereby keeping the driving load of the display panel consistent.

[0091] The first control signal 41 mentioned above can be understood as the enable control signal output by the display panel. The load size of the load element composed of the first capacitor 11 and the first switching transistor 12 can be adjusted by setting the time of the low voltage signal (VGL) output by the enable control signal, that is, the load can be adjusted.

[0092] In one embodiment, the first capacitor 11 can use the area of ​​the original light-emitting pixel, and the required capacitance value can be adjusted according to the actual simulation. The capacitance value can be between the capacitance value of the second capacitor 1327 and the capacitance value of the pixel parasitic capacitance in the pixel circuit 20, so as to keep the driving load of the display panel consistent.

[0093] In one embodiment, such as Figure 6 As shown, the first switching transistor 12 can be a thin-film transistor, including a substrate 1201, a buffer layer 1202, a Polly layer 1203, a gate insulating layer 1204, a planarization layer 1205, a packaging layer 1206, an N-type doped layer 1207, a P-type doped layer 1208, a gate 1209, a source trace 1210 (M1 / M2), and a drain trace 1211.

[0094] One can use the M1 (Metal 1, Mo / Al / Mo) or M2 (Metal 2, Ti / Al / Ti) layer corresponding to the photomask to design vias to connect to the resource drive lines in the plane, thus eliminating the need to add an additional photomask.

[0095] Furthermore, in this application, the area occupied by the OLED light-emitting material can be used to design a load compensation circuit, so as to improve the display split-screen problem of the display panel without increasing the black border of the display panel.

[0096] This application also provides an electronic device, including the above-described display panel.

[0097] It should be noted that the implementation method of the above-described display panel embodiment is also applicable to the embodiment of the electronic device and can achieve the same technical effect, so it will not be described again here.

[0098] Among them, electronic devices can be mobile phones, tablets, laptops, handheld computers, in-vehicle electronic devices, wearable devices, ultra-mobile personal computers (UMPCs), netbooks, or personal digital assistants (PDAs), etc.

[0099] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0100] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A display panel, characterized in that, include: The display panel includes a load compensation circuit and a pixel circuit. The display panel includes a display area and a non-display area. The pixel circuit is disposed in the display area, and the load compensation circuit is disposed in the non-display area. The pixel circuit includes a light-emitting element, and the load compensation circuit does not include the light-emitting element. The load compensation circuit includes a first capacitor, a first switching transistor, and a first switching circuit. The first terminal of the first capacitor is electrically connected to the cathode of the light-emitting element. The second terminal of the first capacitor is connected to a first voltage signal through the first switching circuit. The control terminal and the first terminal of the first switching transistor are both electrically connected to the second terminal of the first capacitor. The second terminal of the first switching transistor is also electrically connected to the first terminal of the first capacitor. When the first switching circuit controls the second terminal of the first capacitor to be turned on and connected to the first voltage signal, the first voltage signal is used to charge the first terminal of the first switching transistor and the first capacitor. Wherein, the anode of the light-emitting element is used to connect to the first voltage signal, and the first voltage signal is used to initialize the anode potential of the light-emitting element; The first switching circuit includes a second switching transistor and a first switching sub-circuit. The second terminal of the first capacitor is connected to the first voltage signal through the second switching transistor, and the second terminal of the first capacitor is also connected to the pixel driving signal through the first switching sub-circuit. The first terminal of the second switch is used to receive the first voltage signal, the second terminal of the second switch is electrically connected to the second terminal of the first capacitor, and the control terminal of the second switch is used to receive the first control signal. The display panel has multiple display cycles, each display cycle including a first stage and a second stage set consecutively; the display panel is in a load compensation working mode, and in the first stage, the second switch is turned on, the first voltage signal is used to charge the first terminal of the first switch and the first capacitor, the first switch and the first capacitor constitute a load element. The load size of the load element is related to the charging time of the load element.

2. The display panel according to claim 1, characterized in that, The first switching sub-circuit includes a third switching transistor, a fourth switching transistor, a fifth switching transistor, a sixth switching transistor, a seventh switching transistor, an eighth switching transistor, and a second capacitor; The first terminal of the third switch is electrically connected to the second terminal of the fourth switch, the second terminal of the third switch is electrically connected to the first terminal of the fifth switch, and the control terminal of the third switch is electrically connected to the second terminal of the second capacitor. The first terminal of the fourth switch is used to receive a pixel driving signal, and the control terminal of the fourth switch is used to receive a second control signal. The second terminal of the fifth switch is electrically connected to the second terminal of the first capacitor, and the control terminal of the fifth switch is used to receive the second control signal. The first terminal of the sixth switch is used to receive the second voltage signal, the second terminal of the sixth switch is electrically connected to the first terminal of the third switch, and the control terminal of the sixth switch is used to receive the first control signal. The first terminal of the seventh switch is electrically connected to the second terminal of the second capacitor, the second terminal of the seventh switch is electrically connected to the second terminal of the third switch, and the control terminal of the seventh switch is used to receive the third control signal; The first terminal of the eighth switch is electrically connected to the second terminal of the second capacitor. The second terminal of the eighth switch is used to receive a third voltage signal, and the control terminal of the eighth switch is used to receive a fourth control signal. The first terminal of the second capacitor is used to connect to the pixel driving signal, and the second terminal of the second capacitor is used to connect to the third voltage signal; The pixel circuit includes a third capacitor. The first end of the third capacitor is used to connect to the pixel driving signal, and the second end of the third capacitor is used to connect to the third voltage signal. The third voltage signal is used to initialize the third capacitor.

3. The display panel according to claim 2, characterized in that, The pixel circuit includes a ninth switch, a tenth switch, an eleventh switch, a twelfth switch, a thirteenth switch, a fourteenth switch, a fifteenth switch, and a sixteenth switch. The first terminal of the ninth switch is electrically connected to the second terminal of the tenth switch, the second terminal of the ninth switch is electrically connected to the first terminal of the eleventh switch, and the control terminal of the ninth switch is electrically connected to the second terminal of the third capacitor. The first terminal of the tenth switch is used to connect to the pixel driving signal, and the control terminal of the tenth switch is used to connect to the second control signal. The second terminal of the eleventh switch is electrically connected to the anode of the light-emitting element, and the control terminal of the eleventh switch is used to receive the second control signal; The first terminal of the twelfth switch is used to receive the second voltage signal, the second terminal of the twelfth switch is electrically connected to the second terminal of the third capacitor, and the control terminal of the twelfth switch is used to receive the first control signal. The first terminal of the thirteenth switch is used to receive the first voltage signal, the second terminal of the thirteenth switch is electrically connected to the anode of the light-emitting element, and the control terminal of the thirteenth switch is used to receive the first control signal. The first terminal of the fourteenth switch is used to receive a pixel signal, the second terminal of the fourteenth switch is electrically connected to the first terminal of the ninth switch, and the control terminal of the fourteenth switch is used to receive a fifth control signal. The first terminal of the fifteenth switch is electrically connected to the second terminal of the third capacitor, the second terminal of the fifteenth switch is electrically connected to the second terminal of the ninth switch, and the control terminal of the fifteenth switch is used to receive a third control signal. The first terminal of the sixteenth switch is electrically connected to the second terminal of the third capacitor, the second terminal of the sixteenth switch is connected to a third voltage signal, and the control terminal of the sixteenth switch is used to connect to a fourth control signal.

4. The display panel according to claim 3, characterized in that, When the display panel is in load compensation mode: In the first stage, the first control signal controls the second switch, the sixth switch, the twelfth switch and the thirteenth switch to be turned on, and the second control signal controls the fourth switch, the fifth switch, the tenth switch and the eleventh switch to be turned off; In the second stage, the first control signal controls the second switch, the sixth switch, the twelfth switch and the thirteenth switch to turn off, and the second control signal controls the fourth switch, the fifth switch, the tenth switch and the eleventh switch to turn on.

5. The display panel according to claim 4, characterized in that, When the display panel is in other operating modes: In the first stage, the first control signal controls the twelfth and thirteenth switches to be turned on, and the second control signal controls the tenth and eleventh switches to be turned off; In the second stage, the first control signal controls the twelfth and thirteenth switches to turn off, and the second control signal controls the tenth and eleventh switches to turn on.

6. The display panel according to claim 3, characterized in that, The capacitance value of the first capacitor is between the capacitance value of the second capacitor and the capacitance value of the pixel parasitic capacitance in the pixel circuit.

7. The display panel according to claim 3, characterized in that, The first switch, the second switch, the third switch, the fourth switch, the fifth switch, the sixth switch, the seventh switch, the eighth switch, the ninth switch, the tenth switch, the eleventh switch, the twelfth switch, the thirteenth switch, the fourteenth switch, the fifteenth switch, and the sixteenth switch are all thin-film transistors.

8. An electronic device, characterized in that, Includes the display panel as described in any one of claims 1 to 7.

Images