CN120813199A

CN120813199A - Display panel and display device

Info

Publication number: CN120813199A
Application number: CN202511248976.5A
Authority: CN
Inventors: 李俊峰; 王琛; 邵阳; 薛爱华
Original assignee: Yungu Guan Technology Co Ltd
Current assignee: Yungu Guan Technology Co Ltd
Priority date: 2025-09-03
Filing date: 2025-09-03
Publication date: 2025-10-17

Abstract

The present application provides a display panel and a display device. The display panel includes: a substrate; an isolation structure, wherein the isolation structure includes a first sublayer, a second sublayer, and a third sublayer stacked in a direction away from the substrate, the first sublayer including a first extension protruding toward an isolation opening relative to the second sublayer; a light-emitting functional layer, wherein the light-emitting units include a first light-emitting unit and a second light-emitting unit having different light-emitting colors, and along a direction parallel to the plane of the substrate, the overlap length between the first light-emitting unit and the corresponding first extension is greater than the overlap length between the second light-emitting unit and the corresponding first extension; and a first electrode layer, wherein the first electrode layer includes a first sub-electrode and a second sub-electrode, and along a direction parallel to the plane of the substrate, the overlap length between the first sub-electrode and the corresponding first extension is greater than the overlap length between the second sub-electrode and the corresponding first extension. This improves the performance of the display panel.

Description

Display panel and display device

Technical Field

The present application relates to the field of display devices, and in particular, to a display panel and a display device.

Background

Organic LIGHT EMITTING (OLED) and flat display devices based on light emitting Diode (LIGHT EMITTING) technology have been widely used in various consumer electronic products such as mobile phones, televisions, notebook computers, and desktop computers, because of their advantages such as high image quality, power saving, thin body, and wide application range. In the conventional display panel manufacturing process, patterning of light emitting pixels is typically achieved through a Fine Metal Mask (FMM). The FMM technology is mature and the mass production experience is rich. However, the FMM technology has the problems of limited precision, high development cost, long development period and the like. The technology of no fine metal mask eliminates the limitation of the traditional OLED technology on the size, resolution and other screen performances of the display screen, and has the advantages of high performance, full-scale size and agile delivery. Patent CN118251982A、CN116648095A、CN117062489A、CN118742138A、CN118678783A、CN118660598A、CN118675450A、CN118824188A、CN118781966A describes the relevant content of fine metal mask free technology for reference.

However, the uniformity of the light emitting effect of the different light emitting units is not satisfactory due to the structural limitation of the existing display panel.

Disclosure of Invention

The embodiment of the application provides a display panel and a display device, which can reduce the direct contact length difference of a first electrode layer and a first extension part corresponding to different light-emitting units, so that unit impedance of a first sub-electrode, a second sub-electrode and the first extension part tends to be consistent, the uniformity of light emission of the first light-emitting unit and the second light-emitting unit is further improved, the display effect of the display panel is improved, and the service performance of the display panel is improved.

The embodiment of the first aspect of the application provides a display panel, which comprises a substrate, an isolation structure, a light-emitting functional layer and a first electrode layer, wherein the isolation structure is arranged on one side of the substrate and surrounds the substrate to form a plurality of isolation openings, the isolation structure comprises a first sub-layer, a second sub-layer and a third sub-layer which are arranged in a stacked mode in a direction away from the substrate, the first sub-layer comprises a first extension part protruding towards one side of the isolation opening relative to the second sub-layer, the light-emitting functional layer comprises a light-emitting unit at least partially positioned in the isolation opening, the light-emitting unit comprises a first light-emitting unit and a second light-emitting unit with different light-emitting colors, the overlap length of the first light-emitting unit and the corresponding first extension part is larger than the overlap length of the second light-emitting unit and the corresponding first extension part along a direction parallel to the plane of the substrate, and the overlap length of the first electrode layer is larger than the overlap length of the first electrode layer and the corresponding first extension part along the direction parallel to the first sub-electrode.

According to any one of the foregoing embodiments of the first aspect of the present application, along a direction parallel to a plane in which the substrate is located, a difference between a lap length of the first light emitting unit and the corresponding first extension portion and a lap length of the first sub-electrode and the first extension portion is a first difference, a difference between a lap length of the second light emitting unit and the corresponding first extension portion and a lap length of the second sub-electrode and the first extension portion is a second difference, and the first difference is equal to 90% to 110% of the second difference.

According to any one of the foregoing embodiments of the first aspect of the present application, a ratio between a lap length of the light emitting unit and the corresponding first extension portion and a length of the corresponding first extension portion is less than or equal to one half in a direction parallel to a plane in which the substrate is located.

According to any one of the foregoing embodiments of the first aspect of the present application, the overlapping length of the first light emitting unit and the first extension portion is greater than zero, the overlapping length of the second light emitting unit and the first extension portion is greater than zero, or the overlapping length of the first light emitting unit and the first extension portion is greater than zero, and the overlapping length of the second light emitting unit and the first extension portion is equal to zero.

According to any one of the preceding embodiments of the first aspect of the present application, an orthographic projection of the first extension portion on the substrate is annular.

According to any of the foregoing embodiments of the first aspect of the present application, the overlap lengths between the first sub-electrode, the second sub-electrode and the first extension portion are all greater than zero, and the light emitting device further includes a second electrode layer disposed on one side of the substrate, where the second electrode layer includes a plurality of second electrodes distributed at intervals, and the second electrodes are located on one side of the light emitting unit facing the substrate.

According to any one of the foregoing embodiments of the first aspect of the present application, along a direction parallel to a plane in which the substrate is located, a length of the first extension portion corresponding to the first light emitting unit is greater than a length of the first extension portion corresponding to the second light emitting unit.

According to any one of the first aspect of the present application, the light emitting unit further includes a third light emitting unit, where the light emitting color of the third light emitting unit and the light emitting color of the first light emitting unit and the light emitting color of the second light emitting unit are different, the overlap length of the third light emitting unit and the first extension portion facing away from the substrate side surface is smaller than the overlap length of the first light emitting unit and the first extension portion facing away from the substrate side surface along a direction parallel to the plane where the substrate is located, and/or the overlap length of the third light emitting unit and the first extension portion facing away from the substrate side surface is larger than the overlap length of the second light emitting unit and the first extension portion facing away from the substrate side surface, preferably, the first light emitting unit includes a green light emitting unit, the second light emitting unit includes a blue light emitting unit, and the third light emitting unit includes a red light emitting unit.

According to any one of the foregoing embodiments of the first aspect of the present application, the overlapping length of the first light emitting unit and the first extension portion is greater than zero, and the overlapping length of the third light emitting unit and the first extension portion is greater than zero, or the overlapping length of the first light emitting unit and the first extension portion is greater than zero, and the overlapping length of the third light emitting unit and the first extension portion is equal to zero.

According to any one of the foregoing embodiments of the first aspect of the present application, the first electrode layer further includes a third sub-electrode located on a side of the third light emitting unit facing away from the substrate, and a lap joint length of the third sub-electrode and the first extension facing away from the substrate side surface is smaller than a lap joint length of the first sub-electrode and the first extension facing away from the substrate side surface in a direction parallel to a plane where the substrate is located, and/or a lap joint length of the third sub-electrode and the first extension facing away from the substrate side surface is greater than a lap joint length of the second sub-electrode and the first extension facing away from the substrate side surface.

An embodiment of the second aspect of the present application provides another display panel, including a substrate, an isolation structure disposed on one side of the substrate and enclosing to form a plurality of isolation openings, where the isolation structure includes a first sub-layer, a second sub-layer, and a third sub-layer stacked in a direction away from the substrate, the first sub-layer includes a first extension portion protruding toward one side of the isolation opening with respect to the second sub-layer, a light emitting functional layer includes a light emitting unit at least partially disposed in the isolation opening, the light emitting unit includes a first light emitting unit and a second light emitting unit having different light emitting colors, and the first electrode layer includes a first sub-electrode disposed on one side of the first light emitting unit facing away from the substrate and a second sub-electrode disposed on one side of the second light emitting unit facing away from the substrate, and a direct contact length between the first sub-electrode and the first extension portion is equal to 90% to 110% of a direct contact length between the second sub-electrode and the first extension portion along a direction parallel to a plane where the substrate is located.

According to any one of the foregoing embodiments of the second aspect of the present application, a ratio between a lap length of the light emitting unit and the corresponding first extension portion and a length of the corresponding first extension portion is less than or equal to one half in a direction parallel to a plane in which the substrate is located.

According to any one of the foregoing embodiments of the second aspect of the present application, a lap joint length of the first light emitting unit and the first extension portion is greater than zero, and a lap joint length of the second light emitting unit and the first extension portion is greater than zero.

According to any one of the preceding embodiments of the second aspect of the present application, an orthographic projection of the first extension portion on the substrate is annular.

According to any one of the foregoing embodiments of the second aspect of the present application, a lap joint length of the first light emitting unit and the first extension portion is greater than zero, and a lap joint length of the second light emitting unit and the first extension portion is equal to zero.

According to any one of the foregoing embodiments of the second aspect of the present application, the light emitting unit further includes a third light emitting unit, where the light emitting color of the third light emitting unit and the light emitting color of the first light emitting unit and the light emitting color of the second light emitting unit are different, and the first electrode layer further includes a third sub-electrode located on a side of the third light emitting unit facing away from the substrate, and in a direction parallel to a plane where the substrate is located, a direct contact length of the third sub-electrode and the first extension is equal to 90% to 110% of a direct contact length of the first sub-electrode and the first extension, and/or a direct contact length of the third sub-electrode and the first extension is equal to 90% to 110% of a direct contact length of the second sub-electrode and the first extension.

According to any one of the foregoing embodiments of the second aspect of the present application, the length of the first extension portion correspondingly overlapped by the first light emitting unit is greater than the length of the first extension portion correspondingly overlapped by the third light emitting unit along a direction parallel to the plane of the substrate, and/or the length of the first extension portion correspondingly overlapped by the third light emitting unit is greater than the length of the first extension portion correspondingly overlapped by the second light emitting unit.

Embodiments of the third aspect of the present application also provide a display device, including a display panel according to any one of the first and second aspects.

The display panel has the beneficial effects that in the display panel provided by the embodiment of the application, the overlapping length of the first light-emitting unit and the corresponding first extension part is larger than the overlapping length of the second light-emitting unit and the corresponding first extension part in the direction parallel to the plane of the substrate, and meanwhile, the overlapping length of the first sub-electrode and the corresponding first extension part is larger than the overlapping length of the second sub-electrode and the corresponding first extension part in the direction parallel to the plane of the substrate, so that the difference of the direct contact lengths of the first electrode layers and the first extension parts corresponding to different light-emitting units is reduced, the unit impedance of the first sub-electrode and the second sub-electrode and the unit impedance of the first extension part tend to be consistent, the light-emitting uniformity of the first light-emitting unit and the second light-emitting unit is further improved, the display effect of the display panel is improved, and the service performance of the display panel is improved.

Drawings

Other features, objects and advantages of the present application will become more apparent upon reading the following detailed description of non-limiting embodiments thereof, taken in conjunction with the accompanying drawings in which like or similar reference characters designate the same or similar features.

Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present application;

FIG. 2 is a schematic view of a partially enlarged structure of FIG. 1;

FIG. 3 is a partial cross-sectional view at A-A in FIG. 2 provided by the first embodiment;

fig. 4 is a partially enlarged structural schematic view at the first light emitting unit in fig. 3;

fig. 5 is a partially enlarged structural schematic view at the second light emitting unit in fig. 3;

FIG. 6 is a partial cross-sectional view at A-A in FIG. 2 provided by a second embodiment;

fig. 7 is a partially enlarged structural schematic view at the second light emitting unit in fig. 6;

FIG. 8 is a partial cross-sectional view at A-A in FIG. 2 provided by a third embodiment;

FIG. 9 is a partial cross-sectional view at A-A in FIG. 2 provided by a fourth embodiment;

FIG. 10 is a partial cross-sectional view at A-A in FIG. 2 provided by the fifth embodiment;

Fig. 11 is a schematic structural diagram of a pixel circuit of a display panel according to an embodiment of the present application.

Reference numerals illustrate:

10. a display panel;

100. A substrate;

200. an isolation structure; 210, a first sub-layer, 211, a first extension, 220, a second sub-layer, 230, a third sub-layer;

300. A light-emitting functional layer; 310, a first light-emitting unit, 320, a second light-emitting unit, 330, a third light-emitting unit;

400. first electrode layer 410, first sub-electrode 420, second sub-electrode 430, third sub-electrode;

500. A second electrode layer;

600. a pixel defining layer 610, a pixel opening;

700. Encapsulation layer 710, first encapsulation layer 711, first segment 712, second segment 720, second encapsulation layer 730, third encapsulation layer;

K. Isolation opening, J1, first lap joint part, J2, second lap joint part, J3, third lap joint part, J4, fourth lap joint part, S, source electrode, D, drain electrode, G, grid electrode, T, pixel driving circuit, C, capacitor, C1, first polar plate, C2, second polar plate, T1, driving transistor, T2, data transistor, data signal, scan, scanning signal, VSS, low level voltage signal, VDD, high level voltage signal.

Detailed Description

Features and exemplary embodiments of various aspects of the application are described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the application. It will be apparent, however, to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the application by showing examples of the application. In the drawings and the following description, at least some well-known structures and techniques have not been shown in order to avoid unnecessarily obscuring the present application, and the dimensions of some of the structures may be exaggerated for clarity. Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. The components of the embodiments of the present application generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

It should be noted that like reference numerals and letters refer to like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures. It should be noted that, in the case of no conflict, different features in the embodiments of the present application may be combined with each other.

For ease of understanding, the X-axis, Y-axis and Z-axis are depicted as being orthogonal to each other in the drawings. The direction along the X axis is referred to as the X direction, the direction along the Y axis is referred to as the Y direction, and the direction along the Z axis is referred to as the Z direction. The Z direction is a normal direction with respect to a plane including the X direction and the Y direction. The case where various elements are viewed parallel to a plane including the X direction and the Y direction is referred to as a plan view. Or the planes of the X direction and the Y direction are planes parallel to the display surface of the display panel, and the Z direction is a direction parallel to the thickness direction of the display panel.

For some elements, the terms "upper" or "upper" are sometimes used when describing the position of an element in the Z direction, and the terms "lower" or "lower" are sometimes used when describing the position of an element in the opposite direction. In the case where the positional relationship between the two elements is defined by terms such as "upper", "lower", "opposite", the terms include not only a state in which the two elements are directly in contact with each other but also a state in which the two elements are separated from each other with a gap or other elements interposed therebetween. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Fig. 1 is a schematic structural view of a display panel according to an embodiment of the present application. The display panel may be an Organic LIGHT EMITTING Diode (OLED) or a Quantum Dot LIGHT EMITTING Diode (QLED). The display panel includes a display area AA having a display function and a non-display area NA.

The display area AA of the display panel may have a rectangular shape, or may have other shapes such as a square, a circle, or an ellipse.

The display area AA includes a plurality of pixels PX arranged in the X direction and the Y direction. The pixel PX includes a plurality of sub-pixels SPX displaying different colors. In some embodiments, the pixel PX includes a first subpixel SPX1, a second subpixel SPX2, and a third subpixel SPX3, for example, the first subpixel SPX1 is a blue subpixel, the second subpixel SPX2 is a green subpixel, and the third subpixel SPX3 is a red subpixel. In some embodiments, the pixel PX includes sub-pixels SPX that emit white or other colors of light in addition to the sub-pixels SPX1, SPX2, SPX 3.

The sub-pixel SPX includes a pixel driving circuit, and a light emitting device that emits light of a corresponding color driven by the pixel driving circuit. The first subpixel SPX1 includes a first light emitting device, the second subpixel SPX2 includes a second light emitting device, and the third subpixel SPX3 includes a third light emitting device. A pixel driving circuit drives at least one light emitting device to emit light. For example, the display area AA includes a normal display area and a light-transmitting display area, the light-transmitting display area is a display area that is disposed corresponding to the sensor and has light-transmitting property, the normal display area is a display area that is not disposed corresponding to the sensor, one pixel driving circuit drives one light-emitting device to emit light in the normal display area, and one pixel driving circuit drives one or more light-emitting devices to emit light in the light-transmitting display area.

As shown in fig. 2 to 5, an embodiment of the first aspect of the present application provides a display panel 10, which includes a substrate 100, an isolation structure 200 disposed on one side of the substrate 100 and enclosing to form a plurality of isolation openings K, the isolation structure 200 including a first sub-layer 210, a second sub-layer 220 and a third sub-layer 230 stacked in a direction away from the substrate 100, the first sub-layer 210 including a first extension 211 protruding toward the isolation opening K side with respect to the second sub-layer 220, and a light emitting functional layer 300 including light emitting units at least partially disposed in the isolation openings K, the light emitting units including first light emitting units 310 and second light emitting units 320 having different light emitting colors, wherein a lap length a1 of the first light emitting units 310 and the corresponding first extension 211 is greater than a lap length a2 of the second light emitting units 320 and the corresponding first extension 211 in a direction parallel to a plane of the substrate 100, and the first electrode layer 400 includes a first sub-electrode 410 disposed on a side of the first light emitting units 310 facing away from the substrate 100 and a first extension 211 facing a second sub-electrode 420 in a direction parallel to the first plane 420b of the first electrode 420 and the first sub-electrode 211 b corresponding to the first extension 211 in a direction parallel to the first plane 420b of the first sub-electrode 211.

In the display panel 10 provided by the embodiment of the application, the display panel 10 includes a substrate 100, an isolation structure 200, a light emitting function layer 300 and a first electrode layer 400. The light emitting functional layer 300 includes a first light emitting unit 310 and a second light emitting unit 320 disposed at intervals, and the first light emitting unit 310 and the second light emitting unit 320 can be used for emitting light of different color sub-pixels respectively.

The first electrode layer 400 includes a first sub-electrode 410 and a second sub-electrode 420 that are disposed at intervals, where the first sub-electrode 410 is disposed on a side of the first light-emitting unit 310 that faces away from the substrate 100, and the second sub-electrode 420 is disposed on a side of the second light-emitting unit 320 that faces away from the substrate 100, and the first sub-electrode 410 and the second sub-electrode 420 can both be connected with the first sub-layer 210 of the isolation structure 200, so that adjacent first sub-electrode 410 and second sub-electrode 420 can be electrically connected through the first sub-layer 210, so that control of the first electrode layer 400 in the display panel 10 is facilitated, and control difficulty of the display panel 10 is reduced.

In the display panel 10 provided in the embodiment of the invention, while the overlapping length a1 of the first light emitting unit 310 and the corresponding first extension portion 211 is greater than the overlapping length a2 of the second light emitting unit 320 and the corresponding first extension portion 211 along the direction parallel to the plane of the substrate 100, the overlapping length b1 of the first sub-electrode 410 and the corresponding first extension portion 211 is greater than the overlapping length b2 of the second sub-electrode 420 and the corresponding first extension portion 211 along the direction parallel to the plane of the substrate 100, so as to reduce the difference of the direct contact lengths of the first electrode layer 400 and the first extension portion 211 corresponding to different light emitting units, and thus the unit impedance of the first sub-electrode 410 and the second sub-electrode 420 and the unit impedance of the first extension portion 211 tend to be consistent, the uniformity of light emission of the first light emitting unit 310 and the second light emitting unit 320 is further improved, the display effect of the display panel 10 is improved, and the use performance of the display panel 10 is improved.

It should be noted that, in some embodiments of the present application, alternatively, one overlapping another may mean that one and one another are in contact, or that one and one are overlapping orthographic projections of another, and do not need to be in contact. The overlap length between one and the other may refer to the length of the surface of one and the other in contact with each other, or the overlap length between one and the other may refer to the length of the orthographic projection of the surface of one and the other in contact with each other on the substrate 100. Wherein a larger overlap length means a larger surface area where the two are in contact with each other.

The length of the surface of one of the two surfaces in contact with the other may be the length of the surface of one of the two surfaces in contact with the other in the cross-sectional view, and may be the length of the surface of one of the two surfaces in contact with the other in the cross-sectional view in the direction perpendicular to the thickness direction of the display panel 10, for example.

Specifically, when at least part of the surfaces between one and the other are in contact with each other, the overlap length between one and the other is considered to be greater than zero, and when one and the other are disposed at a distance from each other, the overlap length between one and the other is considered to be equal to zero.

In this embodiment, along the direction parallel to the plane of the substrate 100, the overlap length b1 of the first sub-electrode 410 and the corresponding first extension portion 211 may refer to the sum of the length of the first sub-electrode 410 and the corresponding first extension portion 211 that are in direct contact with the first sub-electrode 410 located above the first light emitting unit 310, that is, the difference between the overlap length of the first light emitting unit 310 and the corresponding first extension portion 211 and the overlap length of the first sub-electrode 410 and the corresponding first extension portion 211, that is, the length that corresponds to the direct contact between the first sub-electrode 410 and the corresponding first extension portion 211. The overlap length b2 of the second sub-electrode 420 and the corresponding first extension 211 is the same.

In some alternative embodiments, the difference between the overlap length of the first light emitting unit 310 and the corresponding first extension 211 and the overlap length of the first sub-electrode 410 and the first extension 211 is a first difference, and the difference between the overlap length of the second light emitting unit 320 and the corresponding first extension 211 and the overlap length of the second sub-electrode 420 and the first extension 211 is a second difference, in a direction parallel to the plane of the substrate 100, the first difference being equal to 90% to 110% of the second difference.

It should be noted that, the first difference value corresponds to the length c1 of the first sub-electrode 410 and the corresponding first extension portion 211 that are in direct contact, and the second difference value corresponds to the length c2 of the second sub-electrode 420 and the corresponding first extension portion 211 that are in direct contact, so that the uniformity of the light emission of the first light emitting unit 310 and the second light emitting unit 320 is further improved, the display effect of the display panel 10 is improved, and the service performance of the display panel 10 is improved by limiting the first difference value to be 90% to 110% of the second difference value, so as to ensure the uniformity of the direct contact length c1 of the first sub-electrode 410 and the corresponding first extension portion 211 and the direct contact length c2 of the second sub-electrode 420 and the corresponding first extension portion 211, and reduce the difference value therebetween, so that the unit impedance of the first sub-electrode 410 and the second sub-electrode 420 and the first extension portion 211 tends to be uniform.

Alternatively, the first difference may be equal to any one of 90%, 95%, 100%, 105%, 110% of the second difference. When the first difference may be equal to 100% of the second difference, i.e. the first difference is equal to the second difference.

In this embodiment, according to different requirements of different light emitting units on the lateral leakage current, the overlap length of the light emitting functional layer 300 and the first extension portion 211 corresponding to the light emitting unit can be adaptively adjusted, so as to preferentially reduce the overlap length of the light emitting functional layer 300 and the first extension portion 211 of the light emitting unit with higher requirements on the lateral leakage current.

Alternatively, the first light emitting unit 310 and the second light emitting unit 320 may be one of a red light emitting unit, a green light emitting unit, and a blue light emitting unit, respectively.

Alternatively, the first light emitting unit 310 is a red light emitting unit and the second light emitting unit 320 is a blue light emitting unit. Or the first light emitting unit 310 is a green light emitting unit and the second light emitting unit 320 is a blue light emitting unit. The inventor researches and experiments show that the lateral electric leakage of the blue light-emitting unit has the most serious influence, and the red light-emitting unit and the green light-emitting unit have smaller relative shadow. The reasons are as follows:

The blue light emitting unit has the highest driving voltage, and blue light emitting material such as blue light material based on fluorescence has larger energy gap and requires higher driving voltage to achieve the same brightness as the red light emitting unit and the green light emitting unit. The high voltage easily causes large electric field intensity, and the lateral diffusion of charges is aggravated. Blue luminescent materials generally have a shorter lifetime and are more susceptible to electrochemical degradation (e.g., ion migration) at high pressures, further increasing the risk of electrical leakage. Blue light is inefficient, leakage can result in a significant decrease in brightness, and the human eye is more sensitive to changes in blue light brightness. The red light material has a low driving voltage, but a part of the phosphorescent material may have a problem of uneven carrier mobility, resulting in electric leakage. The green light emitting unit is relatively stable, green light material efficiency is high, driving voltage is low, and lateral leakage influence is generally small.

Therefore, in the embodiment of the present invention, the overlap length of the blue light emitting unit or the red light emitting unit, which has a serious influence on the lateral leakage, and the first extension 211 may be reduced, so as to improve the lateral leakage. By arranging the third sub-layer 230 protruding from the conductive structure, the second isolation portion can shield at least part of the materials used for preparing the light emitting layer and the first electrode layer 400 when the light emitting functional layer 300 and the first electrode layer 400 of the display panel 10 are evaporated, so as to isolate the light emitting functional light layer and the first electrode layer 400 between adjacent sub-pixels, and can facilitate the formation of the first light emitting unit 310 and the second light emitting unit 320 which are arranged at intervals, and the formation of the first sub-electrode 410 and the second sub-electrode 420 which are arranged at intervals, so that a mask plate with higher precision is not required when the light emitting layer and the first electrode layer 400 of the display panel 10 are evaporated, for example, a high-precision metal mask plate (FINE METAL MASK, FMM) is not required when the materials of the light emitting layer and the first electrode layer 400 are evaporated, thereby the production and manufacturing costs of the display panel 10 can be reduced well.

Alternatively, the material of the first sub-layer 210 may include a conductive material, for example, the material of the first sub-layer 210 may include at least one of aluminum and molybdenum, so that the first electrode layers 400 of the corresponding portions of the adjacent sub-pixels are electrically connected through the first sub-layer 210. For example, the first sub-electrode 410 and the second sub-electrode 420 may be electrically connected through the first sub-layer 210.

In some embodiments of the present application, the substrate 100 further includes a substrate and a pixel driving circuit T. For example, the substrate 100 includes a substrate and a driving circuit layer and a planarization layer disposed on the substrate. The pixel driving circuit T includes a transistor including a source S, a drain D, a gate G, and a semiconductor layer, and a capacitor C including a first plate C1 and a second plate C2. The driving circuit layer further includes a plurality of signal lines, such as a data signal line, a scan signal line, a driving power supply voltage signal line, and the like. The driving circuit layer includes a plurality of conductive layers including a first conductive layer, a second conductive layer, and a third conductive layer, the gate electrode G and the first plate C1 may be located on the first conductive layer, the second plate C2 may be located on the second conductive layer, and the source electrode S and the drain electrode D may be located on the third conductive layer.

Alternatively, referring to fig. 11, the pixel driving circuit T includes a driving transistor T1 and a Data transistor T2, a source of the Data transistor T2 is connected to a Data line providing a Data signal Data, a gate of the Data transistor T2 is connected to a Scan line providing a Scan signal Scan, a drain of the Data transistor T2 is connected to a gate of the driving transistor T1, both ends of a capacitor C are respectively connected to the gate and the source of the driving transistor T1, a drain of the driving transistor T1 is connected to a light emitting device F, the light emitting device F is connected to a low-level voltage signal VSS, and a source of the driving transistor T1 is connected to a high-level voltage signal VDD. Fig. 11 shows an embodiment of a pixel driving circuit T, and the pixel driving circuit T of the present application is not limited to the pixel driving circuit T of 2T1C shown in fig. 11, but may be other pixel driving circuits T, such as 7T1C, 8T1C pixel driving circuits T, and the like.

Optionally, the display panel 10 may further include a pixel defining layer 600 disposed on one side of the substrate 100, the pixel defining layer 600 may include a pixel defining portion and a pixel opening 610 surrounded by the pixel defining portion, and the light emitting layer may be partially located in the pixel opening 610. The pixel definition layer 600 may be used to participate in dividing the sub-pixels of the display panel 10.

In one embodiment, the pixel defining layer 600 includes a plurality of sub-layers, and the pixel defining layer 600 includes a first defining layer and a second defining layer sequentially stacked in a direction away from the substrate 100, i.e., the pixel defining layer 600 may be of a dual layer design.

Illustratively, the first definition layer has a better film forming property than the second definition layer. That is, the first definition layer can better cover the step structure formed by the first electrode than the second definition layer under the condition of the same thickness, and no crack is generated. On the contrary, in order to obtain the same step coverage effect, the thickness of the first definition layer is thinner than that of the second definition layer, namely, the thickness requirement on the first definition layer is relatively lower, so that the product is thin, and the film forming property is good, the coverage property of the formed film is good, the film is more compact, and the isolation of water vapor is more facilitated. I.e. the material density of the first definition layer is greater than the material density of the second definition layer.

Illustratively, the second defined layer has an etch resistance that is better than the first defined layer. Since the side of the pixel defining layer 600 away from the substrate 100 is etched during the manufacturing process of the display panel 10, the etching resistance of the pixel defining layer 600 can be improved by selecting the material with stronger etching resistance as the second defining layer, so that the reliability of the display panel 10 can be further improved.

Illustratively, the first and second definition layers are of different materials. For example, the material of the first definition layer includes silicon nitride, and the material of the second definition layer includes silicon oxide.

Illustratively, the first defined layer has a thickness greater than or equal to 1000 angstroms and less than or equal to 5000 angstroms. For example, the first defined layer may have a thickness of 1000 angstroms, 2000 angstroms, 3000 angstroms, 4000 angstroms, 5000 angstroms, etc.

Illustratively, the second definition layer has a thickness greater than or equal to 500 angstroms and less than or equal to 3000 angstroms. For example, the thickness of the second definition layer is 500 angstroms, 1000 angstroms, 2000 angstroms, 3000 angstroms, etc.

Optionally, the material of the first sub-layer 210 includes a conductive material, for example, the material of the first sub-layer 210 may include at least one of molybdenum (Mo), titanium (Ti), titanium nitride (TiN), molybdenum tungsten alloy (MoW), or molybdenum niobium alloy (MoNb).

Optionally, the second sub-layer 220 and the third sub-layer 230 are of different materials, and the second sub-layer 220 has an etch rate that is less than the etch rate of the third sub-layer 230. The material of the second sub-layer 220 includes a conductive material, specifically may include at least one of aluminum (Al) and an aluminum alloy, and the aluminum alloy may include at least one of aluminum neodymium (AlNd), aluminum yttrium (AlY) or aluminum silicon (AlSi). The third sub-layer 230 may have a single-layer structure or a multi-layer structure, and in the case that the third sub-layer 230 has a single-layer structure, the material of the third sub-layer 230 may include at least one of titanium, titanium nitride, molybdenum, tungsten, molybdenum tungsten alloy, or molybdenum niobium alloy. In the case that the third sub-layer 230 is a multi-layer structure, one layer of the third sub-layer 230 is made of at least one of titanium, titanium nitride, molybdenum, tungsten, molybdenum tungsten alloy or molybdenum niobium alloy, and the other layer of the third sub-layer 230 may be made of a conductive oxide or an inorganic insulating material, for example, indium Tin Oxide (ITO) or Indium Zinc Oxide (IZO).

Alternatively, the material of the pixel defining layer 600 is an inorganic material, such as the pixel defining layer 600 is formed using an inorganic insulating material of at least one of silicon nitride (SiNx), silicon oxide (SiOx), and silicon oxynitride (SiON).

In some alternative embodiments, the display panel 10 further includes a second electrode layer 500 disposed on one side of the substrate 100, where the second electrode layer 500 includes a plurality of second electrodes disposed at intervals, the second electrodes are disposed on a side of the light emitting unit facing the substrate 100, and the second electrodes are disposed in the pixel openings 610.

Alternatively, the light emitting color of the first light emitting unit 310 may be different from the light emitting color of the second light emitting unit 320 in order to realize a color light emitting display of the display panel 10. Optionally, the light emitting layer may further include a third light emitting unit 330 spaced from the first light emitting unit 310 and the second light emitting unit 320, the first electrode layer 400 further includes a third sub-electrode 430 overlapping the conductive structure, and the third sub-electrode 430 is disposed on a side of the third light emitting unit 330 facing away from the substrate 100, so that adjacent first sub-electrode 410, second sub-electrode 420 and third sub-electrode 430 may be electrically connected through the first sub-layer 210. The light emitting colors of the first light emitting unit 310, the second light emitting unit 320 and the third light emitting unit 330 may be different, so as to further facilitate color display of the display panel 10. For example, the first light emitting unit 310 may be used to emit green light, the second light emitting unit 320 may be used to emit blue light, and the third light emitting unit 330 may be used to emit red light, i.e., the first light emitting unit 310 includes a green light emitting unit, the second light emitting unit 320 includes a blue light emitting unit, and the third light emitting unit 330 includes a red light emitting unit.

Optionally, each of the first, second and third light emitting units 310, 320 and 330 may include a stacked HIL (Hole Inject Layer, hole injection layer), HTL (Hole Transport Layer ), light emitting structure, EIL (Electron Inject Layer, electron injection layer) and ETL (Electron Transport Layer ).

In these alternative embodiments, the first electrode layer 400 and the second electrode layer 500 may serve as pixel electrode layers of the display panel 10, one of the first electrode layer 400 and the second electrode layer 500 may serve as an anode layer, and the other may serve as a cathode layer to drive the light emitting layer to emit light. In the embodiment of the application, the second electrode layer 500 is used as the anode layer of the display panel 10, the first electrode layer 400 is used as the cathode layer of the display panel 10, i.e. the second electrode is used as the anode of the display panel 10, and the first sub-electrode 410, the second sub-electrode 420 and the third sub-electrode 430 can be used as the cathodes of the display panel 10 for illustration.

In order that the light emitting unit can emit light, a pixel voltage is supplied to the second electrode layer 500 and a common voltage is supplied to the first electrode layer 400, respectively, and a potential difference is formed between the first electrode layer 400 and the second electrode layer 500 such that the light emitting unit disposed between the first electrode layer 400 and the second electrode layer 500 emits light. In one embodiment, when a potential difference is formed between the first electrode and the second electrode, the corresponding light emitting functional layer 300 emits light.

Wherein the pixel voltage of the second electrode layer 500 is provided by the pixel driving circuit T, the common voltage of the first electrode layer 400 is provided by the isolation structure 200, specifically, the first electrode layer 400 is electrically connected with the isolation structure 200, and the common voltage is supplied to the first electrode layer 400 by providing the common voltage to the isolation structure 200. That is, the isolation structure 200 has a function of supplying a common voltage to the first electrode layer 400.

The material of the first electrode layer 400 may be one of metal materials such as silver (Ag), aluminum (Al), lithium (Li), magnesium (Mg), ytterbium (Yb), calcium (Ca), or indium (In), and an alloy of the foregoing metal materials, such as a magnesium-silver alloy (Mg/Ag), and a lithium-aluminum alloy (Li/Al), which is not limited In this embodiment.

The second electrode layer 500 may include a multi-layered structure, such as the second electrode layer 500 including a reflective layer and a pair of conductive oxide layers covering upper and lower surfaces of the reflective layer, respectively. The reflective layer can be formed using a metal material excellent in light reflectivity, such as silver. Each conductive Oxide layer can be formed of a transparent conductive Oxide such as ITO (Indium Tin Oxide), IZO (Indium Zinc Oxide: indium zinc Oxide), or IGZO (Indium Gallium Zinc Oxide: indium gallium zinc Oxide).

Optionally, the display panel 10 further includes an encapsulation layer 700, where the encapsulation layer 700 includes a first encapsulation layer 710, and the first encapsulation layer 710 includes a plurality of encapsulation portions, where the encapsulation portions are located on a side of the second electrode facing away from the substrate 100 and extend to a side of the isolation structure 200 facing away from the substrate 100 through a sidewall of the isolation structure 200.

Referring to fig. 10, the package portion includes a first segment 711 and a second segment 712 connected to each other, the first segment 711 is located in the isolation opening K and disposed on a side of the light emitting unit facing away from the substrate 100, the second segment 712 is located on a side of the isolation structure 200 facing toward the isolation opening K, and a side surface of the first segment 711 facing away from the substrate 100 and a side surface of the second segment 712 facing away from the isolation structure 200 are at least partially connected to each other to form a gap space.

Referring to fig. 9, an exemplary embodiment of the present invention may also be provided in which a side surface of the first segment 711 facing away from the substrate 100 is not connected to a side surface of the second segment 712 facing away from the isolation structure 200.

The display panel 10 further includes a second encapsulation layer 720 and a third encapsulation layer 730, the second encapsulation layer 720 covering the isolation structure 200 and the encapsulation portion, and the third encapsulation layer 730 covering the second encapsulation layer 720. The first and third encapsulation layers 710 and 730 are both inorganic materials, and the materials of the first and third encapsulation layers 710 and 730 include at least one of silicon nitride (SiN), silicon oxide (SiO), and silicon oxynitride (SiON). The second encapsulation layer 720 is an organic insulating material, such as a resin material of epoxy, acrylic, or the like. The second encapsulation layer 720 and the third encapsulation layer 730 are continuously disposed at least over the whole of the display area AA, and a portion thereof is also disposed in the non-display area NA.

The material of the second encapsulation layer 720 includes an organic material. The organic material may be made of resin or polymer organic material, and may be specifically formed by IJP (ink jet printing) process. Inkjet printing technology is a non-contact micron-scale printing process that can be accomplished by direct ejection of nano-sized solutions onto flexible or rigid substrates. Specifically, in the inkjet printing, an organic encapsulation material is dissolved in a solvent to form a solution, and then the solution is ejected (i.e., a leather-grade is graded) by a nozzle and an extremely small volume, and each small ink drop is precisely printed on a target film layer, and the film layer of the device is formed after drying.

Optionally, the material of the first encapsulation layer 710 and the material of the third encapsulation layer 730 are the same, so that the first encapsulation layer 710 and the third encapsulation layer 730 can be prepared by using the same equipment, and the preparation process of the display panel 10 can be simplified. The display panel 10 may further include at least one film layer such as a touch layer, a polarizer, a color film substrate 100, a protective cover plate, and the like. The film layer may be adhered to the display panel 10 via an adhesive layer such as OCA (Optical CLEAR ADHESIVE: optically clear adhesive).

In some alternative embodiments, the ratio between the overlap length of the light emitting unit and the corresponding first extension 211 and the length of the corresponding first extension 211 is less than or equal to one half in a direction parallel to the plane in which the substrate 100 lies.

It can be appreciated that, since both the light emitting unit and the first electrode layer 400 need to overlap the first extension portion 211, the overlapping length of the light emitting unit and the first extension portion 211 affects the overlapping length of the corresponding first electrode layer 400 and the first extension portion 211, and the ratio between the overlapping length of the light emitting unit and the adjacent first extension portion 211 facing away from the side surface of the substrate 100 and the length of the corresponding first extension portion 211 is limited to be less than or equal to one half, so as to leave a sufficiently large area of the first extension portion 211 to overlap the first electrode layer 400, and ensure that the first electrode layer 400 and the first extension portion 211 have a sufficient contact area, and ensure that the different first electrode layers 400 corresponding to each light emitting unit can be electrically connected through the first extension portion 211.

Alternatively, the ratio between the overlap length of the light emitting unit and the corresponding first extension 211 and the length of the corresponding first extension 211 is equal to one half in a direction parallel to the plane of the substrate 100.

Referring to fig. 3 to 5, in some alternative embodiments, the overlapping length of the first light emitting unit 310 and the first extending portion 211 is greater than zero, the overlapping length of the second light emitting unit 320 and the first extending portion 211 is greater than zero, the first light emitting unit 310 includes a first overlapping portion J1 overlapping a side surface of an adjacent first extending portion 211 facing away from the substrate 100, the second light emitting unit 320 includes a second overlapping portion J2 overlapping a side surface of an adjacent first extending portion 211 facing away from the substrate 100, and the length of the first overlapping portion J1 is greater than the length of the second overlapping portion J2 along a direction parallel to the plane of the substrate 100.

It can be understood that in the present embodiment, the first light emitting unit 310 and the second light emitting unit 320 are both in direct contact with the first extension portion 211, and the length of the first overlap portion J1 is greater than the length of the second overlap portion J2 along the direction parallel to the plane of the substrate 100, so as to reduce the lateral leakage current generated by the second light emitting unit 320.

Optionally, the front projection of the first extension 211 on the substrate 100 is annular, i.e. the first extension 211 is disposed around the light emitting unit, so that the first electrode layer 400 and the light emitting unit overlap the first extension 211.

Alternatively, the front projection of the first extension portion 211 on the substrate 100 may have a rectangular ring structure, a circular ring structure, or the like, and specifically needs to be selected according to the shape of the light emitting unit, that is, the front projection shape of the first extension portion 211 on the substrate 100 matches the shape of the light emitting unit.

Referring to fig. 6 to 7, in some alternative embodiments, the overlap length of the first light emitting unit 310 and the first extension 211 is greater than zero, and the overlap length of the second light emitting unit 320 and the first extension 211 is equal to zero.

It should be noted that, in the present embodiment, the overlap length of the second light emitting unit 320 and the first extension portion 211 is equal to zero, that is, the second light emitting unit 320 is not in contact with a side surface of the first extension portion 211 facing away from the substrate 100, and a space may be provided between the second light emitting unit 320 and the first extension portion 211 along a direction parallel to the plane of the substrate 100, so that the second light emitting unit 320 is insulated from the first extension portion 211, thereby avoiding occurrence of a lateral leakage current, and simultaneously, the second sub-electrode 420 and the side surface of the first extension portion 211 facing away from the substrate 100 are also facilitated to be in contact. And the first light emitting unit 310 may be in contact with a side surface of the first extension 211 facing away from the substrate 100.

Referring to fig. 3 to 5, in some alternative embodiments, the overlap lengths between the first sub-electrode 410, the second sub-electrode 420 and the first extension portion 211 are all greater than zero, the first sub-electrode 410 includes a third overlap portion J3 overlapping a side surface of the corresponding first extension portion 211 facing away from the substrate 100, the second sub-electrode 420 includes a fourth overlap portion J4 overlapping a side surface of the corresponding first extension portion 211 facing away from the substrate 100, and the length of the third overlap portion J3 is greater than the length of the fourth overlap portion J4 along a direction parallel to the plane of the substrate 100.

It can be understood that, in the present embodiment, the first sub-electrode 410 and the second sub-electrode 420 are directly connected with the first extension portion 211 in contact, and the length of the third overlap portion J3 is greater than the length of the fourth overlap portion J4 along the direction parallel to the plane of the substrate 100, so as to adapt to the size relationship of the overlap lengths of the corresponding first light emitting unit 310, the second light emitting unit 320 and the first extension portion 211, so that the lateral leakage current generated by the second light emitting unit 320 is reduced, the uniformity of the low gray-scale brightness of the display panel 10 is improved, and meanwhile, the overlap impedance of the first sub-electrode 410 and the second sub-electrode 420 and the first extension portion 211 facing away from the surface of the substrate 100 is kept consistent, so that the uniformity of the light emission of the first light emitting unit 310 and the second light emitting unit 320 is further improved, and the display effect of the display panel 10 is improved.

Referring to fig. 3 to 5, in some alternative embodiments, the length of the first extension 211 corresponding to the first light emitting unit 310 is greater than the length of the first extension 211 corresponding to the second light emitting unit 320 along a direction parallel to the plane of the substrate 100.

It can be understood that, in the present embodiment, since the first extension portion 211 refers to a protruding portion of the first sub-layer 210 relative to the second sub-layer 220, the first extension portion 211 is used for overlapping the light emitting unit and the first electrode layer 400, and by reducing the length of the first extension portion 211 corresponding to the overlapping of the second light emitting unit 320, the overlapping length of the second light emitting unit 320 and the first extension portion 211 is correspondingly reduced, so as to reduce the leakage current generated by the second light emitting unit 320, and improve the uniformity of the low gray scale brightness of the display panel 10.

Referring to fig. 3, the first electrode layer 400 may be in contact with both the second sub-layer 220 and the first sub-layer 210, and at this time, along a direction parallel to the plane of the substrate 100, a lap length b1 of the first sub-electrode 410 and the corresponding first extension portion 211 is equal to a length of the corresponding first extension portion 211, and a lap length b2 of the second sub-electrode 420 and the corresponding first extension portion 211 is equal to a length of the corresponding first extension portion 211.

Alternatively, referring to fig. 8, the first electrode layer 400 may be not in contact with the second sub-layer 220, but only connected to the first sub-layer 210, where the overlap length b1 of the first sub-electrode 410 and the corresponding first extension portion 211 is smaller than the length of the corresponding first extension portion 211, and the overlap length b2 of the second sub-electrode 420 and the corresponding first extension portion 211 is smaller than the length of the corresponding first extension portion 211 along the direction parallel to the plane of the substrate 100.

Referring to fig. 3 to 5, in some alternative embodiments, the light emitting unit further includes a third light emitting unit 330, where the light emitting color of the third light emitting unit 330 and the light emitting colors of the first light emitting unit 310 and the second light emitting unit 320 are different, and the overlap length a3 of the third light emitting unit 330 and the first extension 211 facing away from the side surface of the substrate 100 is smaller than the overlap length a1 of the first light emitting unit 310 and the first extension 211 facing away from the side surface of the substrate 100 along the direction parallel to the plane of the substrate 100, and/or the overlap length a3 of the third light emitting unit 330 and the first extension 211 facing away from the side surface of the substrate 100 is greater than the overlap length a2 of the second light emitting unit 320 and the first extension 211 facing away from the side surface of the substrate 100.

In this embodiment, according to different requirements of the material adopted by the third light emitting unit 330 on the lateral leakage current, the overlap length a3 of the third light emitting unit 330 and the first extension portion 211 facing away from the side surface of the substrate 100 may be smaller than the overlap length a1 of the first light emitting unit 310 and the first extension portion 211 facing away from the side surface of the substrate 100, that is, the lateral leakage current generated by the third light emitting unit 330 is reduced, and meanwhile, compared with the second light emitting unit 320, if the requirement of the second light emitting unit 320 on the lateral leakage current is higher, the overlap length a3 of the third light emitting unit 330 and the corresponding first extension portion 211 may be further limited to be larger than the overlap length a2 of the second light emitting unit 320 and the corresponding first extension portion 211, so as to reduce the overlap length a1 of the second light emitting unit 320 and the first extension portion 211 facing away from the side surface of the substrate 100, thereby reducing the lateral leakage current generated by the second light emitting unit 320, improving the uniformity of the lateral leakage current generated by the first light emitting unit 310, the second light emitting unit 320 and the third light emitting unit 330, and further improving the uniformity of the low gray scale luminance of the display panel 10.

Optionally, the difference between the overlap length of the third light emitting unit 330 and the corresponding first extension 211 and the overlap length of the third sub-electrode 430 and the first extension 211 along the direction parallel to the plane of the substrate 100 is a third difference, which is equal to 90% to 110% of the first difference, and/or the third difference is equal to 90% to 110% of the second difference. The unit impedances of the first sub-electrode 410, the second sub-electrode 420, the third sub-electrode 430 and the first extension 211 tend to be uniform, and the use performance of the display panel 10 is improved.

Referring to fig. 3, in some alternative embodiments, the overlapping length of the first light emitting unit 310 and the first extending portion 211 is greater than zero, the overlapping length a3 of the third light emitting unit 330 and the first extending portion 211 is greater than zero, the first light emitting unit 310 includes a first overlapping portion J1 overlapping a side surface of an adjacent first extending portion 211 facing away from the substrate 100, the third light emitting unit 330 includes a fifth overlapping portion overlapping a side surface of an adjacent first extending portion 211 facing away from the substrate 100, and the length of the first overlapping portion J1 is greater than the length of the fifth overlapping portion along a direction parallel to the plane of the substrate 100.

In the present embodiment, the first light emitting unit 310 and the third light emitting unit 330 are both in direct contact with the first extension portion 211, and the length of the first overlap portion J1 is greater than the length of the fifth overlap portion along the direction parallel to the plane of the substrate 100, so as to reduce the lateral leakage current generated by the third light emitting unit 330.

Or in other alternative embodiments, the overlapping length of the first light emitting unit 310 and the first extension 211 is greater than zero, and the overlapping length a3 of the third light emitting unit 330 and the first extension 211 is equal to zero.

It should be noted that, in the present embodiment, the third light emitting unit 330 is not in contact with a side surface of the first extension portion 211 facing away from the substrate 100, and a space may be provided between the third light emitting unit 330 and the first extension portion 211 along a direction parallel to the plane of the substrate 100, so that the third light emitting unit 330 is insulated from the first extension portion 211, avoiding occurrence of a lateral leakage current, and meanwhile, the first electrode layer 400 corresponding to the third light emitting unit 330, that is, the third sub-electrode 430 and the side surface of the first extension portion 211 facing away from the substrate 100 are also facilitated to be in contact. And the first light emitting unit 310 may be in contact with a side surface of the first extension 211 facing away from the substrate 100.

Referring to fig. 3, in some alternative embodiments, the second electrode layer 500 further includes a third sub-electrode 430 disposed on a side of the third light emitting unit 330 facing away from the substrate 100, and along a direction parallel to the plane of the substrate 100, a lap joint length b3 of the third sub-electrode 430 and the first extension 211 facing away from the side surface of the substrate 100 is smaller than a lap joint length b1 of the first sub-electrode 410 and the first extension 211 facing away from the side surface of the substrate 100, and the corresponding magnitude relation between the first light emitting unit 310, the third light emitting unit 330 and the lap joint length a3 of the first extension 211 is adapted, so that the unit impedance of the first sub-electrode 410 and the third sub-electrode 430 and the first extension 211 tends to be consistent while the transverse leakage current generated by the third light emitting unit 330 is reduced, the light emitting uniformity of the first light emitting unit 310 and the third light emitting unit 330 is further improved, the display effect of the display panel 10 is improved, and the service performance of the display panel 10 is improved.

Optionally, the overlap length b3 of the third sub-electrode 430 and the first extension portion 211 facing away from the side surface of the substrate 100 may be further limited to be greater than the overlap length b2 of the second sub-electrode 420 and the first extension portion 211 facing away from the side surface of the substrate 100, so that the unit impedances of the first sub-electrode 410, the second sub-electrode 420, the third sub-electrode 430 and the first extension portion 211 facing away from the side surface of the substrate 100 tend to be consistent, and the uniformity of light emission of the first light emitting unit 310, the second light emitting unit 320 and the third light emitting unit 330 is further improved, thereby improving the display effect of the display panel 10.

Referring to fig. 1 to 5, an embodiment of the present invention further provides a display panel 10, which includes a substrate 100, an isolation structure 200 disposed on one side of the substrate 100 and surrounding to form a plurality of isolation openings, the isolation structure 200 including a first sub-layer 210, a second sub-layer 220 and a third sub-layer 230 stacked in a direction away from the substrate 100, the first sub-layer 210 including a first extension portion 211 protruding toward one side of the isolation opening K with respect to the second sub-layer 220, a light emitting functional layer 300 including at least a portion of light emitting units located in the isolation opening K, the light emitting units including first light emitting units 310 and second light emitting units 320 having different light emitting colors, and a first electrode layer 400 including a first sub-electrode 410 located on one side of the first light emitting unit 310 facing away from the substrate 100 and a second sub-electrode 420 located on one side of the second light emitting unit 320, wherein a direct contact length c1 between the first sub-electrode 410 and the first extension portion 211 is equal to 90% to 110% of a direct contact length c2 between the second sub-electrode 420 and the first extension portion 211 along a direction parallel to a plane where the substrate 100 is located.

In the display panel 10 provided by the embodiment of the invention, the first extension portion 211 refers to a protruding portion of the first sub-layer 210 relative to the second sub-layer 220, the first extension portion 211 is used for overlapping the light emitting unit and the first electrode layer 400, and by limiting the direct contact length c1 of the first sub-electrode 410 and the first extension portion 211 along the direction parallel to the plane of the substrate 100 to be equal to 90% to 110% of the direct contact length c2 of the second sub-electrode 420 and the first extension portion 211, the unit impedance of the first sub-electrode 410, the second sub-electrode 420 and the first extension portion 211 tends to be consistent, the light emitting uniformity of the first light emitting unit 310 and the second light emitting unit 320 is further improved, the display effect of the display panel 10 is improved, and the service performance of the display panel 10 is improved.

Optionally, the direct contact length c1 of the first sub-electrode 410 and the first extension 211 is equal to any one of 90%, 95%, 100%, 105%, 110% of the direct contact length c2 of the second sub-electrode 420 and the first extension 211. When the direct contact length c1 of the first sub-electrode 410 and the first extension portion 211 is equal to 100% of the direct contact length c2 of the second sub-electrode 420 and the first extension portion 211, i.e., the direct contact length c1 of the first sub-electrode 410 and the first extension portion 211 is equal to the direct contact length c2 of the second sub-electrode 420 and the first extension portion 211.

In some alternative embodiments, the ratio between the overlap length of the light emitting unit and the corresponding adjacent first extension 211 and the length of the corresponding first extension 211 is less than or equal to one half in a direction parallel to the plane in which the substrate 100 lies.

In some alternative embodiments, the overlap length of the first light emitting unit 310 and the first extension 211 is greater than zero, and the overlap length of the second light emitting unit 320 and the first extension 211 is equal to zero.

In some alternative embodiments, the light emitting unit further includes a third light emitting unit 330, the light emitting color of the third light emitting unit 330 and the light emitting colors of the first light emitting unit 310 and the second light emitting unit 320 are different, the first electrode layer 400 further includes a third sub-electrode 430 positioned at a side of the third light emitting unit 330 facing away from the substrate 100, a direct contact length c3 of the third sub-electrode 430 and the first extension 211 is equal to 90% to 110% of a direct contact length c1 of the first sub-electrode 410 and the first extension 211 in a direction parallel to a plane of the substrate 100, and/or a direct contact length c3 of the third sub-electrode 430 and the first extension 211 is equal to 90% to 110% of a direct contact length c2 of the second sub-electrode 420 and the first extension 211. The unit impedances of the first sub-electrode 410, the second sub-electrode 420, the third sub-electrode 430 and the first extension 211 tend to be uniform, and the use performance of the display panel 10 is improved.

Referring to fig. 3, in some alternative embodiments, the length of the first extension 211 corresponding to the first light emitting unit 310 is greater than the length of the first extension 211 corresponding to the third light emitting unit 330 along a direction parallel to the plane of the substrate 100, and/or the length of the first extension 211 corresponding to the third light emitting unit 330 is greater than the length of the first extension 211 corresponding to the second light emitting unit 320.

In this embodiment, the lengths of the first extending portions 211 corresponding to the first light emitting unit 310, the second light emitting unit 320, and the third light emitting unit 330 are adjusted so as to adjust and control the overlap length a3 of the first light emitting unit 310, the second light emitting unit 320, the third light emitting unit 330, and the first extending portion 211 on one side surface of the substrate 100, so as to improve the uniformity of the lateral leakage current generated by the first light emitting unit 310, the second light emitting unit 320, and the third light emitting unit 330, and further improve the uniformity of the low gray scale brightness of the display panel 10.

The embodiment of the invention also provides a display device, which comprises the display panel 10 in any embodiment.

Since the display device provided by the embodiment of the present application includes the display panel 10 of any one of the embodiments, the display device provided by the embodiment of the present application has the beneficial effects of the display panel 10 of any one of the embodiments, and is not described herein.

The display device in the embodiment of the application includes, but is not limited to, a mobile phone, a Personal Digital Assistant (PDA), a tablet computer, an electronic book, a television, an access control, a smart phone, a console, and other devices with display functions.

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims

1. A display panel, comprising:

A substrate;

The isolation structure is arranged on one side of the substrate and surrounds the substrate to form a plurality of isolation openings, the isolation structure comprises a first sub-layer, a second sub-layer and a third sub-layer which are stacked in a direction away from the substrate, and the first sub-layer comprises a first extension part which protrudes towards one side of the isolation openings relative to the second sub-layer;

The light-emitting functional layer comprises light-emitting units at least partially positioned in the isolation opening, wherein the light-emitting units comprise first light-emitting units and second light-emitting units with different light-emitting colors, and the overlap joint length of the first light-emitting units and the corresponding first extending parts is larger than that of the second light-emitting units and the corresponding first extending parts along the direction parallel to the plane of the substrate;

The first electrode layer comprises a first sub-electrode positioned on one side of the first light-emitting unit, which is away from the substrate, and a second sub-electrode positioned on one side of the second light-emitting unit, which is away from the substrate, and the overlap length of the first sub-electrode and the corresponding first extension part is greater than the overlap length of the second sub-electrode and the corresponding first extension part along the direction parallel to the plane where the substrate is positioned.

2. The display panel according to claim 1, wherein a difference between a lap length of the first light emitting unit and the corresponding first extension portion and a lap length of the first sub-electrode and the first extension portion is a first difference, and a difference between a lap length of the second light emitting unit and the corresponding first extension portion and a lap length of the second sub-electrode and the first extension portion is a second difference, in a direction parallel to a plane in which the substrate is located;

the first difference is equal to 90% to 110% of the second difference.

3. The display panel according to claim 1, wherein a ratio between a lap length of the light emitting unit and the corresponding first extension portion and a length of the corresponding first extension portion is less than or equal to one half in a direction parallel to a plane in which the substrate is located.

4. The display panel of claim 1, wherein the overlap length of the first light emitting unit and the first extension is greater than zero, the overlap length of the second light emitting unit and the first extension is greater than zero, or the overlap length of the first light emitting unit and the first extension is greater than zero, and the overlap length of the second light emitting unit and the first extension is equal to zero.

5. The display panel of claim 1, wherein an orthographic projection of the first extension on the substrate is annular.

6. The display panel of claim 1, wherein overlap lengths between the first sub-electrode, the second sub-electrode, and the first extension are each greater than zero.

7. The display panel according to claim 1, wherein the length of the first extension portion corresponding to the first light emitting unit is greater than the length of the first extension portion corresponding to the second light emitting unit along a direction parallel to the plane of the substrate.

8. The display panel according to claim 1, wherein the light-emitting unit further includes a third light-emitting unit, and wherein a light-emitting color of the third light-emitting unit and a light-emitting color of the first light-emitting unit and the second light-emitting unit are each different;

and/or the overlap length of the third light-emitting unit and the first extension part, which are away from the side surface of the substrate, is greater than the overlap length of the second light-emitting unit and the first extension part, which are away from the side surface of the substrate.

9. The display panel of claim 8, wherein a overlap length of the first light emitting unit and the first extension is greater than zero, and a overlap length of the third light emitting unit and the first extension is greater than zero;

or, the overlap joint length of the first light emitting unit and the first extension part is greater than zero, and the overlap joint length of the third light emitting unit and the first extension part is equal to zero.

10. The display panel of claim 8, wherein the first electrode layer further comprises a third sub-electrode on a side of the third light emitting unit facing away from the substrate;

And/or the overlap length of the third sub-electrode and the first extension part, which are away from the side surface of the substrate, is greater than the overlap length of the second sub-electrode and the first extension part, which are away from the side surface of the substrate.

11. A display panel, comprising:

A substrate;

A light-emitting functional layer including a light-emitting unit at least partially located within the isolation opening, the light-emitting unit including a first light-emitting unit and a second light-emitting unit having different light-emitting colors;

The first electrode layer comprises a first sub-electrode positioned on one side of the first light-emitting unit, which is away from the substrate, and a second sub-electrode positioned on one side of the second light-emitting unit, which is away from the substrate, wherein the direct contact length of the first sub-electrode and the first extension part is equal to 90-110% of the direct contact length of the second sub-electrode and the first extension part along the direction parallel to the plane of the substrate.

12. The display panel according to claim 11, wherein a ratio between a lap length of the light emitting unit and the corresponding first extension portion and a length of the corresponding first extension portion is less than or equal to one half in a direction parallel to a plane in which the substrate is located.

13. The display panel of claim 11, wherein the overlap length of the first light emitting unit and the first extension is greater than zero, and the overlap length of the second light emitting unit and the first extension is greater than zero.

14. The display panel of claim 11, wherein the orthographic projection of the first extension on the substrate is annular.

15. The display panel of claim 11, wherein the overlap length of the first light emitting unit and the first extension is greater than zero and the overlap length of the second light emitting unit and the first extension is equal to zero.

16. The display panel according to claim 11, wherein the light-emitting unit further comprises a third light-emitting unit, the light-emitting color of the third light-emitting unit and the light-emitting colors of the first light-emitting unit and the second light-emitting unit are different, and the first electrode layer further comprises a third sub-electrode on a side of the third light-emitting unit facing away from the substrate;

The direct contact length of the third sub-electrode and the first extension part is equal to 90% to 110% of the direct contact length of the first sub-electrode and the first extension part along the direction parallel to the plane of the substrate;

And/or the direct contact length of the third sub-electrode and the first extension is equal to 90% to 110% of the direct contact length of the second sub-electrode and the first extension.

17. The display panel of claim 16, wherein the length of the first extension portion correspondingly overlapped by the first light emitting unit is greater than the length of the first extension portion correspondingly overlapped by the third light emitting unit along a direction parallel to the plane of the substrate;

And/or the length of the first extension part correspondingly overlapped by the third light-emitting unit is greater than the length of the first extension part correspondingly overlapped by the second light-emitting unit.

18. A display device comprising the display panel according to any one of claims 1 to 17.