Display panel and display device

Abstract

The present application relates to a display panel and a display device. The display panel includes a display area and a non-display area; the display area includes a first display area and a second display area; the non-display area includes a first non-display area and a second non-display area; the first display area surrounds the first non-display area; the second non-display area surrounds the display area; a shift register circuit is provided in the second non-display area, and the shift register circuit includes a plurality of cascaded shift register units; the output module of the shift register unit is electrically connected to the pixel driving circuit of the display area through a scan line in the display area; the shift register unit electrically connected to the pixel driving circuit of the first display area is a first type of shift register unit; the shift register unit electrically connected to the pixel driving circuit of the second display area is a second type of shift register unit; the transistor size of the output module of the first type of shift register unit is larger than the transistor size of the output module of the second type of shift register unit. Based on the above solution, the brightness split screen problem can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of display panels, and in particular to a display panel and a display device. Background Art

[0002] Taking mobile phones as an example, the display panels of most existing mobile phones are provided with through holes for accommodating front sensors (such as image sensors), and pixel units are generally not provided at the positions of the through holes.

[0003] The pixel units in the display panel are controlled by the pixel driver circuit and the surrounding vertical shift register circuit (VSR, also known as the gate driver circuit). In existing technical solutions, to reduce VSR power consumption, a single-sided drive (usually set in the non-display area) is generally used to drive the pixel units in a full-row drive mode. That is, the shift register circuit is only set on one side of the display panel.

[0004] The problem with this solution is that due to the unilateral driving of the VSR, the VSR has a stronger driving capability for pixel circuits closer to the VSR and a weaker driving capability for pixel circuits farther away from the VSR. As a result, there is a difference in the VSR's driving capability on the left and right sides of the display panel. The difference is more obvious in the display areas on both sides of the through-hole, which can easily cause split-screen problems. Summary of the Invention

[0005] In order to solve the above technical problems, the present application provides a display panel and a display device.

[0006] In a first aspect, the present application provides a display panel, comprising: a display panel comprising: a display area and a non-display area;

[0007] The display area includes a first display area and a second display area; the non-display area includes a first non-display area and a second non-display area; the first display area surrounds the first non-display area; the second non-display area surrounds the display area;

[0008] A shift register circuit is provided in the second non-display area, and the shift register circuit includes a plurality of cascaded shift register units; an output module of the shift register unit is electrically connected to a pixel driving circuit in the display area through a scan line in the display area;

[0009] Among them, the shift register unit electrically connected to the pixel driving circuit of the first display area is a first type shift register unit; the shift register unit electrically connected to the pixel driving circuit of the second display area is a second type shift register unit; the transistor size of the output module of the first type shift register unit is larger than the transistor size of the output module of the second type shift register unit.

[0010] In a second aspect, based on the same inventive concept, the present application also provides a display device, comprising a display panel as described in any one of the first aspects.

[0011] The technical solution provided by this application has the following advantages compared with the existing technology:

[0012] The display panel provided by the present application includes a first display area and a second display area, wherein the first display area is an area surrounding the first non-display area. In order to avoid the brightness split screen problem in the first display area on the left and right sides of the first non-display area, the present application sets the shift register units of the first display area and the second display area differently. The shift register unit electrically connected to the pixel driving circuit of the first display area is a first type of shift register unit, and the shift register unit electrically connected to the pixel driving circuit of the second display area is a second type of shift register unit, and the transistor size of the output module of the first type of shift register unit is larger than the transistor size of the output module of the second type of shift register unit. When the transistor size is larger, the on-state current of the transistor is also larger, which can make the driving capability of the first type of shift register unit stronger, and improve the horizontal split screen problem caused by the large difference in driving voltage drop of the shift register in the first display area on both sides of the first non-display area. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0014] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0015] Figure 1 A schematic diagram showing the panel structure in the relevant scheme;

[0016] Figure 2 A schematic diagram of a display panel structure provided in an embodiment of the present application;

[0017] Figure 3 A schematic diagram of a pixel driving circuit structure provided in an embodiment of the present application;

[0018] Figure 4 A schematic diagram of the structure of a scan drive shift register unit provided in an embodiment of the present application;

[0019] Figure 5 A schematic diagram of the structure of a light-emitting control shift register unit provided in an embodiment of the present application;

[0020] Figure 6 A schematic diagram of a display panel film layer structure provided in an embodiment of the present application;

[0021] Figure 7 A schematic diagram of another display panel film layer structure provided in an embodiment of the present application;

[0022] Figure 8 A schematic diagram of another display panel structure provided in an embodiment of the present application;

[0023] Figure 9 A schematic diagram of another display panel structure provided in an embodiment of the present application;

[0024] Figure 10 A schematic diagram of another display panel structure provided in an embodiment of the present application;

[0025] Figure 11 A schematic diagram of another display panel structure provided in an embodiment of the present application;

[0026] Figure 12 A schematic diagram of the structure of a display device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0027] In order to more clearly understand the above-mentioned objectives, features and advantages of the present application, the scheme of the present application will be further described below. It should be noted that, in the absence of conflict, the embodiments of the present application and the features therein can be combined with each other.

[0028] In the following description, many specific details are set forth to facilitate a full understanding of the present application, but the present application can also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present application, not all of the embodiments.

[0029] It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the present invention. Therefore, the present invention is intended to cover modifications and variations of the present invention that fall within the scope of the corresponding claims (technical solutions claimed for protection) and their equivalents. It should be noted that the embodiments provided in the embodiments of the present invention may be combined with each other unless there is any contradiction.

[0030] It should be noted that the embodiments of the present application illustrate the relevant schemes and the technical schemes in the embodiments of the present application through the drawings. It is impossible to enumerate all shapes of display panels here, such as circular display panels, fan-shaped display panels and even octagonal display panels, etc., but the principles are the same.

[0031] Figure 1Schematic diagram of the display panel structure in a related solution. In the embodiments of this application, all display panels are illustrated or exemplified as rectangular display panels. The side where the binding area 02 is located is defined as the bottom side, the side opposite the side where the binding area 02 is located is defined as the top side, and the remaining two sides are defined as side sides. The shift register circuit 100 is generally provided on one side of the display panel, rather than on both sides, to reduce the width of the non-display area NA (border) of the display panel.

[0032] Figure 1 For the convenience of explanation, the XY coordinate axis is shown in the figure. The row direction is the X direction, and the column direction is the Y direction. The same row means the same Y value in the XY coordinate axis, and the same column means the same X value in the XY coordinate axis. Figure 1 As can be seen, the shift register circuit 100 is electrically connected from the non-display area NA (frame) to each row of pixel driver circuits 201 in the display area AA, controlling the pixel driver circuits 201. Due to the extension of the scan line 03 of the shift register circuit 100, the greater the distance between the scan line 03 and the shift register circuit 100, the greater the voltage drop of the signal emitted by the shift register circuit 100, and the weaker the driving ability of the distant pixel driver circuits 201. If this were the case alone, since the voltage drop gradually changes with the extension of the distance, the display effect of the pixel units controlled by the pixel driver circuits 201 in the same row can also be considered to change relatively gradually, and the user will not perceive the difference in brightness changes clearly.

[0033] However, since the display panel is provided with a through hole 01 for accommodating the front sensor, the position of the through hole 01 through which the shift register circuit 100 passes is ( Figure 1 Pixel units and pixel driving circuits 201 are generally not provided in the A1 area in the through hole 01. Due to the increased distance from the shift register circuit 100, the voltage drops on the left and right sides of the through hole 01 (i.e., the side close to the shift register circuit 100 and the side away from the shift register circuit 100) are different, resulting in different display effects on the left and right sides of the through hole 01. In addition, due to the presence of the through hole 01, the left and right sides of the through hole 01 cannot be transitioned through the display effect of the pixel units. Ultimately, the user can notice the difference in display effects on the left and right sides of the through hole 01, causing a split-screen problem.

[0034] In order to solve the above technical problems, the present invention provides a display panel. Figure 2 A schematic diagram of a display panel structure provided in an embodiment of the present application, wherein the display panel includes a display area AA and a non-display area NA.

[0035] The display area AA includes a first display area AA1 and a second display area AA2. The non-display area NA includes a first non-display area NA1 and a second non-display area NA2. The first display area AA1 surrounds the first non-display area NA1. The second non-display area NA2 surrounds the display area AA.

[0036] The second non-display area NA2 is provided with a shift register circuit 100, which includes a plurality of cascaded shift register units 101. The output module of the shift register unit 101 is electrically connected to the pixel driving circuit 201 of the display area AA through the scan line 03 in the display area AA.

[0037] The shift register unit 101 electrically connected to the pixel driving circuit 201 of the first display area AA1 is a first-type shift register unit 1011. The shift register unit 101 electrically connected to the pixel driving circuit 201 of the second display area AA2 is a second-type shift register unit 1012. The transistor size of the output module of the first-type shift register unit 1011 is larger than the transistor size of the output module of the second-type shift register unit 1012.

[0038] Depend on Figure 2 The structure shown in FIG. 1 is understood to include the first non-display area NA1 corresponding to the through-hole 01, the second non-display area NA2 being the frame area, the first display area AA1 being the display area surrounding the through-hole 01, and the second display area AA2 being the normal display area without the through-hole 01. In the embodiment of the present application, the shift register circuit 100 also drives the pixel driver circuit 201 in the display area AA by driving the entire row.

[0039] In the embodiment of the present application, the shift register units 101 of the first display area AA1 and the second display area AA2 are classified and set. The transistor size of the output module of the first type of shift register unit 1011 is larger than the transistor size of the output module of the second type of shift register unit 1012. Specifically, the transistor size can be visualized as the channel width-to-length ratio of the transistor. When the channel width-to-length ratio of the transistor is larger, more carriers can be added, the current amplification capability of the transistor is increased, the current gain is improved, and the impedance of the transistor is reduced, and the on-state current of the transistor is also larger. In this way, the driving capability of the first type of shift register unit 1011 can be made stronger, and the voltage drop difference between the pixel driving circuit 201 on the left and right sides of the through hole 01 (i.e., the side close to the shift register circuit 100 and the side away from the shift register circuit 100) is reduced, so that the difference in the signal received between the two is smaller, thereby achieving the purpose of improving the large difference in the display effect on the left and right sides of the through hole 01 and reducing the impact on the user's experience.

[0040] In some embodiments, the shift register circuit includes a scan driving shift register circuit and / or a light emitting control shift register circuit.

[0041] Figure 3 A schematic diagram of a pixel driving circuit structure provided in an embodiment of the present application. The circuit includes transistors T1 to T7 and a capacitor Cst. 04 represents a light-emitting diode, which can also refer to a pixel unit. N1 to N4 represent nodes in the pixel driving circuit 201. PVDD indicates that the terminal is electrically connected to the PVDD power signal line. PVEE indicates that the terminal is electrically connected to the PVEE power signal line. Vdata indicates that the terminal is electrically connected to the data signal line. Vref indicates that the terminal is electrically connected to the reference signal line. Scan1 and Scan2 indicate that the terminal is electrically connected to a scan drive shift register circuit. However, the scan drive shift register circuits connected to Scan1 and Scan2 are not the same circuit. Emit indicates that the terminal is electrically connected to the light emission control shift register circuit.

[0042] In an embodiment of the present application, at least one of the scan drive shift register circuit and the light emission control shift register circuit is improved. Specifically, the transistor size of the output module of the scan drive shift register circuit electrically connected to the pixel drive circuit of the first display area is larger than the transistor size of the output module of the scan drive shift register circuit electrically connected to the pixel drive circuit of the second display area, and / or the transistor size of the output module of the light emission control shift register circuit electrically connected to the pixel drive circuit of the first display area is larger than the transistor size of the output module of the scan drive shift register circuit electrically connected to the pixel drive circuit of the second display area. By improving the scan drive shift register circuit and / or the light emission control shift register circuit, the purpose of improving the large difference in display effect between the left and right sides of the through hole is achieved, thereby reducing the impact on the user experience.

[0043] In some embodiments, the output module of the first type shift register unit includes a first transistor and a second transistor. The first electrode of the first transistor is electrically connected to the first signal terminal, the second electrode of the first transistor and the first electrode of the second transistor are both electrically connected to the output terminal of the output module of the first type shift register unit, and the second electrode of the second transistor is electrically connected to the second signal terminal.

[0044] The output module of the second type shift register unit includes a third transistor and a fourth transistor. A first electrode of the third transistor is electrically connected to the first signal terminal, a second electrode of the third transistor and a first electrode of the fourth transistor are both electrically connected to the output terminal of the output module of the second type shift register unit, and a second electrode of the fourth transistor is electrically connected to the second signal terminal.

[0045] The size of the first transistor is larger than that of the third transistor. The size of the second transistor is larger than that of the fourth transistor.

[0046] Specifically, the shift register circuit may include a scan drive shift register circuit and a light emitting control shift register circuit, so the shift register unit may be a shift register unit in the scan drive shift register circuit (hereinafter referred to as the scan drive shift register unit), or a shift register unit in the light emitting control shift register circuit (hereinafter referred to as the light emitting control shift register unit).

[0047] Figure 4 Schematic diagram of a scan drive shift register unit structure provided by an embodiment of the present application. Figure 4 As shown, the scan drive shift register unit includes transistors T8 to T15 and capacitors C1 to C2. The connection relationship between each transistor and capacitor is as shown in FIG. Figure 4 As shown, no further details are given here. Figure 4 In the figure, IN indicates that the terminal is electrically connected to the upper scan drive shift register unit, CK1 and CK2 indicate that the terminal is electrically connected to the clock signal line, but the clock signal lines connected to CK1 and CK2 are different, VGH and VGL indicate that the terminal is electrically connected to the voltage signal line, but the voltage signals corresponding to the voltage signal lines connected to VGH and VGL are different, the level signal corresponding to VGH is a high level, and the voltage signal corresponding to VGL is a low level, and OUT indicates that the terminal is electrically connected to the pixel driving circuit (for example Figure 3 Scan2 end in the middle) and the next level scan drive shift register unit. Figure 4 The output module of the scan drive shift register unit is shown as 1013.

[0048] The embodiment of the present application can make the transistor size of the output module of the first type shift register unit corresponding to the first display area larger than the transistor size of the output module of the second type shift register unit corresponding to the second display area. Figure 4 The first transistor of the output module of the first type shift register unit and the third transistor of the output module of the second type shift register unit can be, for example, Figure 4 The second transistor of the output module of the first type shift register unit and the fourth transistor of the output module of the second type shift register unit can be, for example, Figure 4 In the transistor T14, the first signal terminal can be as follows Figure 4 The VGH in the second signal terminal can be as follows Figure 4 It should be noted that, since the circuit connection structure of the scan drive shift register unit is not improved in the embodiment of the present application, only one attached Figure 4At the same time, the first type of shift register unit (scan drive shift register unit) and the second type of shift register unit (scan drive shift register unit) are illustrated. Therefore, in the above embodiment, the first transistor and the third transistor are described as transistor T15, and the second transistor and the fourth transistor are described as transistor T14. However, it is obvious that the first transistor and the third transistor are not the same element, and the second transistor and the fourth transistor are not the same element. The principles of the following embodiments are the same as this and will not be repeated here. Figure 4 、 Figure 3 and Figure 2 When the pixel unit needs to display high brightness, if the size of the transistor T15 (i.e., the first transistor) in the scan drive shift register unit electrically connected to the pixel drive circuit 201 of the first display area AA1 and the size of the transistor T14 (i.e., the second transistor) in the scan drive shift register unit electrically connected to the pixel drive circuit 201 of the first display area AA1 are larger, the on-state current will be larger, thereby alleviating the problem of insufficient low level output by the scan drive shift register unit due to the influence of voltage drop. Figure 3 The low level written to the N1 node is insufficient, which makes the current of the light-emitting diode 04 too large. Figure 2 The brightness on the right side of the through hole 01 (i.e., the side away from the shift register circuit 100) will be significantly higher than the brightness on the left side of the through hole 01 (i.e., the side close to the shift register circuit 100), resulting in a left-right split screen problem. However, in the embodiment of the present application, by setting the size of the transistor T8 (i.e., the first transistor) in the scan drive shift register unit electrically connected to the pixel drive circuit 201 of the first display area AA1 and the size of the transistor T7 (i.e., the second transistor) in the scan drive shift register unit electrically connected to the pixel drive circuit 201 of the first display area AA1 to be larger, the driving capability of the scan drive shift register unit can be improved, the problem of insufficient low level output by the scan drive shift register unit due to the influence of voltage drop can be solved, and the left-right split screen problem of the through hole 01 can be solved, thereby improving the user experience.

[0049] Figure 5 This is a schematic diagram of the structure of a light emitting control shift register unit provided in an embodiment of the present application. Figure 5 As shown, the shift register unit includes transistors T16 to T25 and capacitors C3 to C5. The connection relationship between each transistor and capacitor is as shown in FIG. Figure 5 As shown, no further details are given here. Figure 5In the figure, IN indicates that the terminal is electrically connected to the upper-level light-emitting control shift register unit, CK1 and CK2 indicate that the terminal is electrically connected to the clock signal line, but the clock signal lines connected to CK1 and CK2 are different, VGH and VGL indicate that the terminal is electrically connected to the voltage signal line, but the voltage signals corresponding to the voltage signal lines connected to VGH and VGL are different, the level signal corresponding to VGH is a high level, and the voltage signal corresponding to VGL is a low level, and OUT indicates that the terminal is electrically connected to the pixel driving circuit (for example Figure 3 The Emit terminal in the middle) and the next level light emitting control shift register unit. Figure 5 The output module of the scan drive shift register unit is shown as 1014.

[0050] The embodiment of the present application can make the transistor size of the output module of the first type shift register unit corresponding to the first display area larger than the transistor size of the output module of the second type shift register unit corresponding to the second display area. Figure 5 The first transistor of the output module of the first type shift register unit and the third transistor of the output module of the second type shift register unit can be, for example, Figure 5 The second transistor of the output module of the first type shift register unit and the fourth transistor of the output module of the second type shift register unit can be, for example, Figure 5 The transistor T25 in the first signal terminal can be as follows Figure 5 The VGH in the second signal terminal can be as follows Figure 5 VGL in . Combined Figure 5 、 Figure 3 and Figure 2 When the pixel unit needs to display low brightness, the light-emitting control shift register unit generally controls the pixel unit to emit light in a multi-pulse manner, which will amplify the impact of the voltage drop and the light-emitting condition of the pixel unit will be affected. Figure 3 If the driving capability of the light-emitting control shift register unit is insufficient, the output level of the light-emitting control shift register unit will be insufficient, which will lead to Figure 3 The turn-on voltage of T1 and T6 is insufficient, resulting in low brightness of the light-emitting diode 04. In addition, due to the voltage drop, the output signal difference of the light-emitting control shift register unit on the left and right sides of the through hole 01 is caused, resulting in the Emit signal being different on the left and right sides of the through hole 01. Figure 3 The coupling amount of the N4 node in the pixel driving circuit is different. Figure 2The brightness on the right side of the through hole 01 (i.e., the side away from the shift register circuit 100) will be significantly higher than the brightness on the left side of the through hole 01 (i.e., the side close to the shift register circuit 100), resulting in a left-right split screen problem. In the embodiment of the present application, the size of the transistor T24 (i.e., the first transistor) in the light-emitting control shift register unit electrically connected to the pixel drive circuit 201 of the first display area AA1 and the size of the transistor T25 (i.e., the second transistor) in the light-emitting control shift register unit 101 electrically connected to the pixel drive circuit 201 of the first display area AA1 are set to be larger, so that the on-state current is larger, which can alleviate the insufficient low level output by the light-emitting control shift register unit 101 due to the influence of the voltage drop, thereby improving the left-right split screen problem of the through hole 01.

[0051] Refer to the above Figure 2 In the embodiment of the present application, the first and second transistors can be improved by increasing the channel width-to-length ratio of the first transistor to be greater than the channel width-to-length ratio of the third transistor, and the channel width-to-length ratio of the second transistor to be greater than the channel width-to-length ratio of the fourth transistor. By increasing the channel width-to-length ratio of the first and second transistors, the on-state currents of the first and second transistors can be increased, thereby improving the brightness splitting problem on the left and right sides of the through hole 01.

[0052] In some embodiments, the output module of the shift register unit further includes a capacitor, which is electrically connected to the gate of the transistor of the output module.

[0053] The capacitance value of the output module of the first type shift register unit is greater than the capacitance value of the output module of the second type shift register unit.

[0054] See Figure 1 The first non-display area NA1, where the through hole 01 is located, has no pixel units or pixel driver circuit 201. As the scan line 03 lengthens, the voltage drop of the signal emitted by the shift register circuit 100 increases, weakening the driving capability of the pixel driver circuit 201. The voltage drops of the signals received by the pixel driver circuits 201 on the left and right sides of the through hole 01 also differ significantly, causing the display panel to split left and right at the through hole 01.

[0055] Therefore, the embodiments of this application are intended to Figure 4 Output module 1013 and / or Figure 5At least part of the capacitors in the output module 1014 in the scanning drive shift register unit (first type shift register unit) are improved, that is, at least one of the capacitors in the output module 1013 in the scanning drive shift register unit (first type shift register unit) and / or the capacitors in the output module 1014 in the light emitting control shift register unit (first type shift register unit) is improved. By increasing the capacitance value of the output module 1013 and / or the output module 1014, the ability of the capacitor of the output module 1013 to store charge can be improved, thereby actually improving the voltage stabilizing ability of the capacitor for the transistor connected thereto, and being able to more stably control the corresponding transistor to be turned on or off, alleviating the problem of voltage drop. As a result, the display difference caused by the voltage drop on the left and right sides of the through hole 01 is improved, reducing the impact on the user's experience.

[0056] In some embodiments, the first type of shift register unit further includes a first capacitor and a second capacitor. The second type of shift register unit further includes a third capacitor and a fourth capacitor. The first capacitor is electrically connected to the gate of the first transistor. The second capacitor is electrically connected to the gate of the second transistor. The third capacitor is electrically connected to the gate of the third transistor. The fourth capacitor is electrically connected to the gate of the fourth transistor.

[0057] The capacitance value of the first capacitor is greater than the capacitance value of the third capacitor. The capacitance value of the second capacitor is greater than the capacitance value of the fourth capacitor.

[0058] Continue reading Figure 4 ,by Figure 4 Taking the scan drive shift register unit in the example, the first capacitor of the output module of the first type of shift register unit and the third capacitor of the output module of the second type of shift register unit can be, for example, Figure 4 The second capacitor of the output module of the first type shift register unit and the fourth capacitor of the output module of the second type shift register unit can be, for example, Figure 4 Capacitor C1 in FIG. It is understood that the more charge stored in C2, the stronger C2's voltage stabilization capability for T15, and the more charge stored in C1, the stronger C1's voltage stabilization capability for T14. Therefore, the embodiment of the present application can improve the left-right screen split problem caused by the voltage drop on the left and right sides of the through hole by increasing the capacitance of the first capacitor and the second capacitor.

[0059] In some embodiments, the first capacitor includes a first plate and a second plate, and the second capacitor includes a third plate and a fourth plate.

[0060] The first electrode plate is electrically connected to the gate of the first transistor, and the third electrode plate is electrically connected to the gate of the second transistor.

[0061] The second plate includes a first portion and a second portion electrically connected. The first portion is insulated and overlaps with the first plate. The second portion is insulated and overlaps with the gate of the first transistor. The fourth plate includes a third portion and a fourth portion electrically connected. The third portion is insulated and overlaps with the third plate. The fourth portion is insulated and overlaps with the gate of the second transistor.

[0062] Figure 6 This is a schematic diagram of a display panel film structure provided by an embodiment of the present application. The following description is made taking the first capacitor as an example. Figure 6 As shown, Figure 6 The Poly in represents the active layer, Figure 6 MC in it represents the capacitor metal layer, Figure 6 M2 in the figure represents the metal layer corresponding to the source and drain. Figure 6 M1 in the figure represents the metal layer corresponding to the gate. Figure 6 701 is shown as the gate of the first transistor. Figure 6 In the figure, the first plate is indicated as 702, and the second plate is indicated as 703. The second plate 703 and the first plate 702 are insulated and overlapped (meaning that they overlap in a direction perpendicular to the plane where the display panel is located and are insulated from each other), thereby forming a first capacitor.

[0063] In order to increase the capacitance of the first capacitor in the embodiment of the present application, the second plate 703 can be divided into a first portion 7031 and a second portion 7032, wherein the first portion 7031 is insulated and overlapped with the first plate 702. On this basis, the second portion 7032 is added, the first portion 7031 is electrically connected to the second portion 7032, the first plate 702 is electrically connected to the gate 701, the first plate 702 is insulated and overlapped with the first portion 7031, and the second portion 7032 of the second plate 703 is insulated and overlapped with the gate 701 of the first transistor 301. Therefore, it actually uses the gate 701 as a part of the first capacitor (the first plate 702), thereby increasing the facing area between the two plates of the first capacitor (the first plate 702 and the second plate 703). It can be understood that the capacitance of a capacitor is proportional to the size of the facing area between the two plates of the capacitor. The larger the facing area, the larger the capacitance of the capacitor. Therefore, the embodiment of the present application can increase the capacitance of the first capacitor through the above scheme, so that the capacitance of the first capacitor is greater than that of the third capacitor, thereby achieving the purpose of improving the voltage stabilization capability and alleviating the problem of the through-hole split screen.

[0064] For the second capacitor, we can continue with Figure 6 For reference, the third plate is equivalent to Figure 6 The first plate 702 in the fourth plate is equivalent to Figure 6 The second electrode 703 in the fourth electrode is equivalent to the third portion of the fourth electrode Figure 6 The first part 7031 in the fourth plate is equivalent to the fourth part of the fourth plate Figure 6The second part 7032 in the figure. The principle of the second capacitor is the same as that of the first capacitor, which can increase the capacitance of the second capacitor so that the capacitance of the second capacitor is greater than that of the fourth capacitor, thereby improving the voltage stabilization capability and alleviating the problem of the through-hole left-right split screen.

[0065] In some embodiments, the first capacitor includes a first plate and a second plate, and the second capacitor includes a third plate and a fourth plate.

[0066] The first electrode plate is electrically connected to the gate of the first transistor, and the third electrode plate is electrically connected to the gate of the second transistor.

[0067] The second electrode plate includes a first portion and a second portion that are electrically connected. The first portion is insulated and overlaps with the first electrode plate. The second portion is electrically connected to the light shielding layer or the source / drain metal layer of the first transistor through a via, and both the light shielding layer of the first transistor and the second portion are at least partially insulated and overlap with the gate of the first transistor.

[0068] The fourth electrode plate includes a third portion and a fourth portion that are electrically connected. The third portion is insulated and overlaps with the first electrode plate. The fourth portion is electrically connected to the light shielding layer or the source / drain metal layer of the second transistor through a via, and the light shielding layer of the second transistor and the fourth portion are both insulated and overlap at least partially with the gate of the second transistor.

[0069] Figure 7 This is another schematic diagram of a display panel film structure provided in an embodiment of the present application. The following description will be made using the first capacitor as an example. Figure 7 As shown, Figure 7 M0 in represents the light shielding layer, Figure 7 The gate of the first transistor is indicated as 701. Figure 7 In the figure, the first plate is indicated as 702, and the second plate is indicated as 703. The second plate 703 and the first plate 702 are insulated and overlapped (meaning that they overlap in a direction perpendicular to the plane where the display panel is located and are insulated from each other), thereby forming a first capacitor.

[0070] In order to increase the capacitance of the first capacitor in the embodiment of the present application, the second plate 703 can be divided into a first part 7031 and a second part 7032, wherein the first part 7031 is insulated and overlapped with the first plate 702. On this basis, the second part 7032 is added, the first part 7031 is electrically connected to the second part 7032, the first plate 702 is electrically connected to the gate 701, and the second part 7032 is electrically connected to the light shielding layer M0 through a via hole, and the light shielding layer M0 and the second part 7032 are insulated and overlapped with the gate 701 of the first capacitor. Therefore, in fact, the light shielding layer M0 is also used as a part of the first capacitor (the first plate 702), and the gate 701 is used as a part of the first capacitor (the second plate 703), thereby increasing the facing area between the two plates of the first capacitor (the first plate 702 and the second plate 703). Therefore, the embodiment of the present application can improve the capacitance of the first capacitor by the above scheme, so that the capacitance of the first capacitor is greater than the third capacitor, thereby achieving the purpose of improving the voltage stabilization capability and alleviating the problem of the left and right split screen of the through hole.

[0071] For the second capacitor, we can continue with Figure 7 For reference, the third plate is equivalent to Figure 7 The first plate 702 in the fourth plate is equivalent to Figure 7 The second electrode 703 in the fourth electrode is equivalent to the third portion of the fourth electrode Figure 7 The first part 7031 in the fourth plate is equivalent to the fourth part of the fourth plate Figure 7 In the second part 7032, the principle of the second capacitor is the same as that of the first capacitor, which can achieve the purpose of increasing the capacitance of the second capacitor, making the capacitance of the second capacitor greater than the capacitance of the fourth capacitor, thereby achieving the purpose of improving the voltage stabilization capability and alleviating the problem of the left and right split screen due to the through-hole.

[0072] In some embodiments, the two cascaded first-type shift register units are located on different sides of the first display area.

[0073] See first Figure 1 The voltage drop of the signal received by the pixel driver circuit 201 far from the shift register circuit 100 is significantly different from that of the signal received by the pixel driver circuit 201 close to the shift register circuit 100, thus affecting the display effect. Further analysis shows that if the display area corresponding to the larger voltage drop is all distributed on the same side of the through hole 01, it will be easier for the user to detect abnormalities in this area.

[0074] Therefore, in the embodiment of the present application, the two cascaded first-type shift register units are located on different sides of the first display area. Figure 8 This is another schematic diagram of a display panel structure provided in an embodiment of the present application. Figure 8As shown, the two cascaded first-type shift register units 1011 are located at opposite sides of the first display area AA1, thereby actually forming a display area with a larger voltage drop to disperse the display area with a larger voltage drop and mixing the display area with a smaller voltage drop to achieve a better display effect. Figure 8 For reference, in the first display area AA1, along the Y direction, there are the display area with larger voltage drop, the display area with smaller voltage drop, the display area with larger voltage drop, and the display area with smaller voltage drop. Figure 8 While the schematic diagram is limited in size and cannot depict more rows of first-type shift register units 1011 connected to pixel driver circuits 201, it is understood that the above arrangement allows for alternating display areas with a higher voltage drop and a lower voltage drop along the Y direction on the same side of through-hole 01 within the first display area AA1. When viewing a display area with a higher voltage drop, the user can "compensate" for it by viewing the display area with a lower voltage drop, thereby alleviating the left-right split screen issue caused by through-hole 01 and improving the user experience.

[0075] Continue to participate Figure 8 In some embodiments, the two cascaded second-type shift register units 1012 are located on the same side of the second display area AA2.

[0076] like Figure 8 As shown, the second-type shift register unit 1012 will not cause obvious display abnormality problems, so the two cascaded second-type shift register units 1012 can be located on the same side of the second display area AA2, reducing the number and routing number of the second-type shift register units 1012 in other areas of the second non-display area NA2 (the second-type shift register unit 1012 is arranged in the second non-display area NA2), which is beneficial to reducing the overall power consumption of the second-type shift register unit 1012, that is, reducing the power consumption of the shift register circuit 100.

[0077] Figure 9 A schematic diagram of another display panel structure provided in an embodiment of the present application. Figure 10 Schematic diagram of another display panel structure provided by an embodiment of the present application. In some embodiments, the output module of the shift register unit 101 is electrically connected to the pixel driving circuits 201 of two adjacent rows in the display area AA.

[0078] like Figure 9 As shown, the embodiment of the present application can be applied to the pixel driving circuits 201 of two adjacent rows by electrically connecting the output module of the same shift register unit 101 to the pixel driving circuits 201 of two adjacent rows. Figure 9That is, the output modules of the first type of shift register unit 1011 are electrically connected to two adjacent rows of pixel driving circuits 201 in the first display area AA1, and the output modules of the second type of shift register unit 1012 are electrically connected to two adjacent rows of pixel driving circuits 201 in the second display area AA2. When the number of rows of pixel driving circuits 201 is fixed, fewer shift register units 101 can reduce the overall power consumption of the shift register unit 101, that is, reduce the power consumption of the shift register circuit 100.

[0079] See Figure 10 In the embodiment of the present application, the two cascaded first-type shift register units 1011 can be arranged on different sides of the first display area AA1, so that the output module of the shift register unit 101 is electrically connected to the pixel driving circuits 201 of two adjacent rows of the display area AA. Figure 10 That is, the output modules of the first type of shift register unit 1011 are electrically connected to two adjacent rows of pixel driving circuits 201 in the first display area AA1, and the output modules of the second type of shift register unit 1012 are electrically connected to two adjacent rows of pixel driving circuits 201 in the second display area AA2. This alleviates the problem of display effects being affected by a large voltage drop concentrated in the display area, reduces the number of shift register units 101, and lowers the overall power consumption of the shift register units 101, thereby reducing the power consumption of the shift register circuit 100.

[0080] In some embodiments, the second non-display area is provided with a first type of first signal line, a second type of first signal line, a first type of second signal line, and a second type of second signal line.

[0081] The first type of first signal line is electrically connected to the first signal terminal of the first type of shift register unit. The first type of second signal line is electrically connected to the second signal terminal of the first type of shift register unit. The second type of first signal line is electrically connected to the first signal terminal of the second type of shift register unit. The second type of second signal line is electrically connected to the second signal terminal of the second type of shift register unit.

[0082] Borrowing Figure 4 and Figure 5 In the prior art, the binding area of ​​the display panel is electrically connected to the Figure 4 The VGH end, CK2 end, and Figure 5The VGH and CK2 terminals in the display panel are connected to the VGH and CK2 terminals in the display panel, and provide specific level signals to multiple scan drive shift register units and light emission control shift register units in the display panel, respectively. Therefore, when the signal is transmitted to the shift register unit corresponding to the first display area, due to the influence of the heavy load, the signal has already generated a certain voltage drop. The technical problem to be solved (at least in part) by the embodiments of the present application is precisely because of the influence of the voltage drop, which causes a large difference in the display effect on the left and right sides of the through-hole. Therefore, when the signals received by all pixel drive circuits in the first display area already have a voltage drop, the voltage drop further increases with the increase in distance from the shift register circuit and the extension of the scan line, thereby amplifying the impact of the voltage drop.

[0083] To this end, the embodiment of the present application can provide a signal separately to the shift register unit corresponding to the first display area. Figure 11 This is another schematic diagram of a display panel structure provided in an embodiment of the present application. Figure 11 As shown, the first signal end of the shift register unit 101 in the first display area AA1 is directly electrically connected to the binding area 02 of the display panel via the first-type first signal line 1101, and the second signal end of the shift register unit 101 in the first display area AA1 is directly electrically connected to the binding area 02 of the display panel via the first-type second signal line 1102. The corresponding multiple shift register units 101 in the first display area AA1 provide level signals separately via the first-type first signal line 1101 and the first-type second signal line 1102. The first signal end of the shift register unit 101 in the second display area AA2 is electrically connected to the binding area 02 of the display panel via the second-type first signal line 1103, and the second signal end of the shift register unit 101 in the second display area AA2 is electrically connected to the binding area 02 of the display panel via the second-type second signal line 1104. The corresponding multiple shift register units 101 in the second display area AA2 provide level signals via the second-type first signal line 1103 and the second-type second signal line 1104. Through the above solution, the problem of voltage drop in the signal received by the shift register unit 101 corresponding to the first display area AA1 is actually alleviated, thereby improving the user experience.

[0084] Figure 12 This is a schematic diagram of the structure of a display device provided in an embodiment of the present application. The display device may include the display panel of any one of the above display panel embodiments.

[0085] Reference may be made to the above-mentioned display panel embodiment. Since the display device provided in the embodiment of the present application includes the above-mentioned display panel, it can also achieve the same or at least similar technical effects as the above-mentioned display panel, which will not be repeated here.

[0086] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0087] The foregoing description is intended only to provide specific embodiments of the present application, which will enable those skilled in the art to understand and implement the present 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 the present application. Therefore, the present application is not limited to the embodiments described herein, but is intended to be construed in the broadest manner consistent with the principles and novel features disclosed herein.

Claims

1. A display panel, characterized in that: include: Display area and non-display area; The display area includes a first display area and a second display area; the non-display area includes a first non-display area and a second non-display area; the first display area surrounds the first non-display area; the second non-display area surrounds the display area; A shift register circuit is provided in the second non-display area, and the shift register circuit includes a plurality of cascaded shift register units; an output module of the shift register unit is electrically connected to a pixel driving circuit in the display area through a scan line in the display area; Among them, the shift register unit electrically connected to the pixel driving circuit of the first display area is a first type shift register unit; the shift register unit electrically connected to the pixel driving circuit of the second display area is a second type shift register unit; the transistor size of the output module of the first type shift register unit is larger than the transistor size of the output module of the second type shift register unit.

2. The display panel according to claim 1, wherein: The shift register circuit includes a scan drive shift register circuit and / or a light emitting control shift register circuit.

3. The display panel according to claim 1, wherein: The output module of the first type shift register unit includes a first transistor and a second transistor; the first electrode of the first transistor is electrically connected to the first signal terminal, the second electrode of the first transistor and the first electrode of the second transistor are both electrically connected to the output terminal of the output module of the first type shift register unit, and the second electrode of the second transistor is electrically connected to the second signal terminal; The output module of the second type shift register unit includes a third transistor and a fourth transistor; the first electrode of the third transistor is electrically connected to the first signal terminal, the second electrode of the third transistor and the first electrode of the fourth transistor are both electrically connected to the output terminal of the output module of the second type shift register unit, and the second electrode of the fourth transistor is electrically connected to the second signal terminal; The size of the first transistor is larger than that of the third transistor; the size of the second transistor is larger than that of the fourth transistor.

4. The display panel according to claim 3, wherein: The channel width-to-length ratio of the first transistor is greater than the channel width-to-length ratio of the third transistor; and the channel width-to-length ratio of the second transistor is greater than the channel width-to-length ratio of the fourth transistor.

5. The display panel according to claim 3, wherein: The output module of the shift register unit further includes a capacitor; the capacitor is electrically connected to the gate of the transistor of the output module; The capacitance value of the output module of the first type shift register unit is greater than the capacitance value of the output module of the second type shift register unit.

6. The display panel according to claim 5, wherein: The first type of shift register unit further includes a first capacitor and a second capacitor; the second type of shift register unit further includes a third capacitor and a fourth capacitor; the first capacitor is electrically connected to the gate of the first transistor; the second capacitor is electrically connected to the gate of the second transistor; the third capacitor is electrically connected to the gate of the third transistor; and the fourth capacitor is electrically connected to the gate of the fourth transistor; The capacitance value of the first capacitor is greater than the capacitance value of the third capacitor; the capacitance value of the second capacitor is greater than the capacitance value of the fourth capacitor.

7. The display panel according to claim 6, wherein: The first capacitor includes a first plate and a second plate; the second capacitor includes a third plate and a fourth plate; The first electrode plate is electrically connected to the gate of the first transistor, and the third electrode plate is electrically connected to the gate of the second transistor; The second electrode plate includes a first and a second electrically connected portion; the first portion is insulated and overlapped with the first electrode plate; the second portion is insulated and overlapped with the gate of the first transistor; the fourth electrode plate includes a third and a fourth electrically connected portion; the third portion is insulated and overlapped with the third electrode plate; the fourth portion is insulated and overlapped with the gate of the second transistor.

8. The display panel according to claim 6 or 7, characterized in that: The first capacitor includes a first plate and a second plate; the second capacitor includes a third plate and a fourth plate; The first electrode plate is electrically connected to the gate of the first transistor, and the third electrode plate is electrically connected to the gate of the second transistor; The second electrode plate includes a first portion and a second portion that are electrically connected; the first portion is insulated and overlapped with the first electrode plate; the second portion is electrically connected to the light shielding layer of the first transistor through a via, and the light shielding layer of the first transistor and the second portion are both insulated and overlapped with at least a portion of the gate of the first transistor; The fourth electrode plate includes a third part and a fourth part that are electrically connected; the third part is insulated and overlapped with the first electrode plate; the fourth part is electrically connected to the light-shielding layer of the second transistor through a via, and the light-shielding layer of the second transistor and the fourth part are at least partially insulated and overlapped with the gate of the second transistor.

9. The display panel according to claim 1, wherein: The two cascaded first-type shift register units are located at different sides of the first display area.

10. The display panel according to claim 1, wherein The two cascaded second-type shift register units are located on the same side of the second display area.

11. The display panel according to claim 1, wherein The output module of the shift register unit is electrically connected to two adjacent rows of pixel driving circuits in the display area.

12. The display panel according to claim 3, wherein: The second non-display area is provided with a first type of first signal line, a second type of first signal line, a first type of second signal line, and a second type of second signal line; Among them, the first-category first signal line is electrically connected to the first signal end of the first-category shift register unit; the first-category second signal line is electrically connected to the second signal end of the first-category shift register unit; the second-category first signal line is electrically connected to the first signal end of the second-category shift register unit; and the second-category second signal line is electrically connected to the second signal end of the second-category shift register unit.

13. A display device, characterized in that: The device comprises a display panel according to any one of claims 1 to 12.

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