Display panel and display device

Abstract

The invention provides a display panel and a display device.The display panel comprises a substrate, a first electrode layer, a pixel definition layer, an isolation structure, a light-emitting layer and a second electrode layer, the isolation structure is arranged in a non-opening area of the pixel definition layer, the light-emitting layer is arranged on the pixel definition layer and covers the isolation structure, and the second electrode layer is arranged on the substrate. The second electrode layer is arranged on the side, away from the pixel definition layer, of the light-emitting layer; the second electrode layer is continuously arranged at the isolation structure, the isolation structure comprises the first isolation part and the second isolation part which are separately arranged, the light-emitting layer is continuously arranged at the position where the first isolation part is located, and the light-emitting layer is disconnected at the position where the second isolation part is located, so that the poor display caused by secret brightness of pixels is effectively improved; meanwhile, it can be guaranteed that the second electrode layer and the light-emitting layer are in good electric contact at the first isolation part, normal transmission of signals is guaranteed, impedance of the second electrode layer is effectively reduced, and power consumption of the display panel is reduced.

Description

Technical Field

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

[0002] Organic Light-Emitting Diode (OLED) devices have the characteristics of low power consumption, fast response speed, and wide viewing angle, and have been widely used in people's lives. In order to further improve the efficiency and life of OLED devices, tandem light emitting technology (Tandem) came into being. In Tandem OLED, different luminescent materials and structures are usually used to construct a multi-layer structure. Each layer can emit light of a specific wavelength. These lights can be combined through proper design and control to form a brighter and richer color performance.

[0003] At present, a charge generation layer (CGL) is often added to a stacked organic light-emitting diode device to improve device performance. However, the charge generation layer has strong charge generation and separation capabilities and strong electrical conductivity. When only one color is lit, other colors are accidentally excited by pixels that should not be lit, affecting the display effect. Generally, the entire light-emitting layer is isolated to avoid the phenomenon of stealing light between adjacent pixels. However, when the light-emitting layer is isolated, the electrical contact between the cathode and the light-emitting layer is interrupted, and the cathode signal cannot be transmitted normally, thereby increasing the cathode impedance and the power consumption of the device. Summary of the invention

[0004] Embodiments of the present invention provide a display panel and a display device to alleviate the deficiencies in the related art.

[0005] To achieve the above functions, the technical solutions provided by the embodiments of the present application are as follows:

[0006] An embodiment of the present application provides a display panel, including:

[0007] substrate;

[0008] A first electrode layer is disposed on one side of the substrate;

[0009] A pixel definition layer is disposed on one side of the substrate, wherein the pixel definition layer includes a pixel opening area and a non-opening area disposed between two adjacent pixel opening areas;

[0010] An isolation structure, disposed on a side of the pixel definition layer away from the substrate, the isolation structure being located in the non-opening area;

[0011] A light-emitting layer, disposed on the pixel definition layer and covering the isolation structure;

[0012] A second electrode layer is disposed on a side of the light-emitting layer away from the pixel definition layer, and the second electrode layer is continuously disposed at the isolation structure;

[0013] The isolation structure includes a first isolation portion and a second isolation portion that are separately arranged, the light-emitting layer is continuously arranged at the location where the first isolation portion is located, and the light-emitting layer is disconnected at the location where the second isolation portion is located.

[0014] Optionally, in one embodiment, the width of the first isolation portion away from the substrate is greater than the width of the first isolation portion close to the substrate, and the width of the second isolation portion away from the substrate is less than the width of the second isolation portion close to the substrate.

[0015] Optionally, in one embodiment, in a direction from the substrate to the isolation structure, the width of the first isolation portion gradually decreases, and the width of the second isolation portion gradually increases.

[0016] Optionally, in one embodiment, in a direction perpendicular to the substrate, the shape of the cross section of the first isolation portion is a regular trapezoid, and the shape of the cross section of the second isolation portion is an inverted trapezoid.

[0017] Optionally, in one embodiment, the first isolation portion includes a first side surface and a first bottom surface, the first bottom surface is located on a side of the first isolation portion close to the substrate, and a first angle is formed between the first side surface and the first bottom surface;

[0018] The second isolation portion includes a second side surface and a second bottom surface, the second bottom surface is located on a side of the second isolation portion close to the substrate, and a second angle is formed between the second side surface and the second bottom surface;

[0019] The range of the first angle is greater than or equal to 55 degrees and less than or equal to 75 degrees; the range of the second angle is greater than or equal to 100 degrees and less than or equal to 120 degrees.

[0020] Optionally, in one embodiment, the distance between the side of the first isolation portion away from the pixel definition layer and the pixel definition layer is greater than or equal to 1.2 microns and less than or equal to 1.8 microns; the distance between the side of the second isolation portion away from the pixel definition layer and the pixel definition layer is greater than or equal to 1 micron and less than or equal to 2 microns.

[0021] Optionally, in one embodiment, the display panel includes a plurality of sub-pixels and a plurality of the isolation structures;

[0022] Among them, a plurality of the isolation structures are arranged around at least one of the sub-pixels, and in a sub-pixel corresponding to the plurality of the isolation structures, the first isolation portion is located on a side of the second isolation portion away from the sub-pixel, or the first isolation portion is located on a side of the second isolation portion close to the sub-pixel.

[0023] Optionally, in one embodiment, the display panel includes a plurality of first sub-pixels displaying a first color, a plurality of second sub-pixels displaying a second color, and a plurality of third sub-pixels displaying a third color, and the first color, the second color, and the third color are all different;

[0024] A plurality of the isolation structures are arranged around a first sub-pixel, and the first isolation portion is located on a side of the second isolation portion close to the first sub-pixel;

[0025] A plurality of the isolation structures are arranged around a second sub-pixel, and the first isolation portion is located on a side of the second isolation portion away from the second sub-pixel;

[0026] A plurality of the isolation structures are arranged around a third sub-pixel, and the first isolation portion is located on a side of the second isolation portion close to the third sub-pixel;

[0027] The luminous efficiency of the second sub-pixel is greater than the luminous efficiency of any one of the first sub-pixel and the third sub-pixel.

[0028] Optionally, in one embodiment, the light-emitting layer includes a first light-emitting portion, a charge generation layer and a second light-emitting portion which are stacked;

[0029] The first light-emitting portion, the charge generation layer and the second light-emitting portion are all continuously arranged at the position where the first isolation portion is located, and the first light-emitting portion, the charge generation layer and the second light-emitting portion are all disconnectedly arranged at the position where the second isolation portion is located.

[0030] An embodiment of the present application provides a display device, comprising any of the display panels described above.

[0031] Beneficial effects of the embodiments of the present application: The embodiments of the present application provide a display panel and a display device, wherein the display panel includes a substrate, a first electrode layer, a pixel definition layer, an isolation structure, a light-emitting layer and a second electrode layer. The second electrode layer is continuously arranged at the isolation structure, and the isolation structure includes a first isolation portion and a second isolation portion that are isolated and arranged. The light-emitting layer is continuously arranged at the position of the first isolation portion, and the light-emitting layer is disconnected at the second isolation portion, thereby effectively improving the poor display caused by pixel stealing. At the same time, it can also ensure that the second electrode layer and the light-emitting layer have good electrical contact at the first isolation portion, ensuring the normal transmission of the signal, thereby effectively reducing the impedance of the second electrode layer and reducing the power consumption of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The technical solutions and other beneficial effects of the present invention will be made apparent by describing in detail the specific embodiments of the present invention in conjunction with the accompanying drawings.

[0033] Figure 1 A schematic diagram of the structure of a display panel provided in an embodiment of the present application;

[0034] Figure 2 The embodiments of the present application provide Figure 1 A schematic diagram of the first enlarged structure at center A;

[0035] Figure 3 A schematic diagram of a structure of a display panel in the related art;

[0036] Figure 4 The embodiments of the present application provide Figure 1 A schematic diagram of the second enlarged structure at A in the middle;

[0037] Figure 5 is another structural schematic diagram of a display panel in the related art;

[0038] Figure 6 is an equivalent circuit diagram of a light emitting device in the related art;

[0039] Figure 7 is another equivalent circuit diagram of a light emitting device in the related art;

[0040] Figure 8 A schematic diagram of the structure of the isolation structure provided in the embodiment of the present application;

[0041] Fig. 9 A schematic top view of a display panel provided in an embodiment of the present application;

[0042] Fig.10 A schematic diagram of the structure of a display device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, unless otherwise stated, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the actual use or working mode of the device, specifically the drawing direction in the accompanying drawings; while "inside" and "outside" refer to the outline of the device.

[0044] In addition, the terms "first" and "second" are used for descriptive purposes only, and the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0045] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0046] The disclosure below provides many different embodiments to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the various specific processes and material examples provided by the present application, but those of ordinary skill in the art can appreciate the application of other processes and / or the use of other materials.

[0047] The embodiments of the present application provide a display panel and a display device. The following are detailed descriptions of each. It should be noted that the description order of the following embodiments is not intended to limit the preferred order of the embodiments.

[0048] See also Figure 1 and Figure 2 ;in, Figure 1 A schematic diagram of the structure of a display panel provided in an embodiment of the present application; Figure 2 The embodiments of the present application provide Figure 1Schematic diagram of the first enlarged structure at A in the middle.

[0049] In one embodiment, the display panel 1 may be an organic light-emitting diode (OLED) display panel. The display panel 1 includes a substrate 11 , a pixel definition layer 12 , an isolation structure 13 and a light-emitting device layer 14 .

[0050] The substrate 11 may be an array substrate, and the substrate 11 includes a first substrate 111, a first shielding layer 112, a second substrate 113, a second shielding layer 114, and a driving circuit layer 115 which are stacked; wherein the first substrate 111 and the second substrate 113 may both include a rigid substrate or a flexible substrate. When the first substrate 111 and the second substrate 113 are both rigid substrates, the material may be metal or glass. When the first substrate 111 and the second substrate 113 are both flexible substrates, the material may include at least one of acrylic resin, methacrylic resin, polyisoprene, vinyl resin, epoxy resin, polyurethane resin, cellulose resin, siloxane resin, polyimide resin, and polyamide resin. This embodiment does not impose any specific restrictions on this.

[0051] The driving circuit layer 115 includes a buffer layer 1151 arranged on the second shielding layer 114, a first gate insulating layer 1152 arranged on the buffer layer 1151, a second gate insulating layer 1153 arranged on the first gate insulating layer 1152, an interlayer insulating layer 1154 arranged on the second gate insulating layer 1153, a first flat layer 1155 arranged on the interlayer insulating layer 1154, and a second flat layer 1156 arranged on the first flat layer 1155; wherein the pixel definition layer 12 is arranged on the side of the second flat layer 1156 away from the first flat layer 1155.

[0052] The driving circuit layer 115 also includes a thin film transistor 1157, which includes an active layer, a first gate, a second gate, a source and a drain. The active layer is arranged between the buffer layer 1151 and the first gate insulating layer 1152, the first gate is arranged between the first gate insulating layer 1152 and the second gate insulating layer 1153, the second gate is arranged between the second gate insulating layer 1153 and the first flat layer 1155, and the source and the drain are arranged between the interlayer insulating layer 1154 and the first flat layer 1155; wherein the driving circuit layer 115 also includes a switching line arranged on the first organic flat layer away from the interlayer insulating layer 1154 and overlapped with the drain, and the switching line is used to connect the drain with the light-emitting device layer 14 to realize signal transmission.

[0053] The pixel definition layer 12 is arranged on a side of the second flat layer 1156 away from the first flat layer 1155, and the pixel definition layer 12 includes a pixel opening 121 area 1201 and a non-opening area 1202 arranged between two adjacent pixel opening 121 areas 1201, and the non-opening area 1202 is located on at least one side of the pixel opening 121 area 1201. If the non-opening area 1202 is located between two adjacent pixel opening 121 areas 1201, the non-opening area 1202 can be arranged around the pixel opening 121 area 1201; specifically, the pixel definition layer 12 includes a plurality of pixel openings 121, and the pixel openings 121 are correspondingly arranged in the pixel opening 121 area 1201 of the pixel definition layer 12, and the pixel opening 121 area 1201 corresponding to the pixel opening 121 can be the luminous pixel area of ​​the display panel 1, and the display of the panel is achieved by arranging pixels of different colors in different pixel openings 121.

[0054] The isolation structure 13 is disposed on a side of the pixel definition layer 12 away from the substrate 11 , and the isolation structure 13 is located in the non-opening area 1202 .

[0055] The light-emitting device layer 14 includes a first electrode layer 141, a light-emitting layer 142, and a second electrode layer 143 which are stacked. The first electrode layer 141 is disposed between the second flat layer 1156 and the pixel definition layer 12. The first electrode layer 141 includes a plurality of first electrodes 1411. One first electrode 1411 is disposed corresponding to one pixel opening 121, and at least part of the first electrode 1411 is exposed in the pixel opening 121. The first electrode layer 141 may be an anode layer, and the first electrode 1411 may be an anode. The first electrode 1411 can be connected to the drain; the light-emitting layer 142 is arranged on the pixel definition layer 12 and covers the isolation structure 13, the light-emitting layer 142 is arranged on the first electrode 1411 and at least part of the light-emitting layer 142 is located in the pixel opening 121; the second electrode layer 143 can be a cathode layer, the second electrode layer 143 is arranged on the side of the light-emitting layer 142 away from the first electrode layer 141, the second electrode layer 143 is arranged as a whole layer, and the second electrode layer 143 is continuously arranged at the isolation structure 13.

[0056] The isolation structure 13 includes a first isolation portion 131 and a second isolation portion 132 which are separately arranged. The light-emitting layer 142 is continuously arranged at the location of the first isolation portion 131 , and the light-emitting layer 142 is disconnected at the location of the second isolation portion 132 .

[0057] Please combine Figure 2 and Figure 3 ;in, Figure 3 It is a structural schematic diagram of a display panel in the related technology; in the related design, the display panel 2 includes a substrate 21, and a pixel definition layer 22 and a light-emitting device layer 23 stacked on the substrate 21, and the light-emitting device layer 23 includes a stacked anode 231, a light-emitting layer 232 and a cathode 233; wherein, in order to avoid the phenomenon of light stealing between adjacent pixels, in the related design, a barrier layer 24 is provided in the non-opening portion of the pixel definition layer 22, and the barrier layer 24 may include a first barrier portion 241 and a second barrier portion 242, and the light-emitting layer 232 is disconnected at both the first barrier portion 241 and the second barrier portion 242, thereby preventing the charges in the adjacent pixels from flowing laterally into another pixel.

[0058] Combination Figure 2 and Figure 3 It can be seen that in the display panel 2, since the light-emitting layer 232 is disconnected in both the first blocking portion 241 and the second blocking portion 242, the cathode signal is isolated in both the first blocking portion 241 and the second blocking portion 242, so that the charge needs to pass through a larger resistance path when it is transmitted horizontally, thereby increasing the impedance of the cathode 233. The higher cathode impedance means that a larger driving voltage is required to achieve the desired brightness, thereby increasing the power consumption of the entire screen.

[0059] It can be understood that in this embodiment, the second electrode layer 143 is continuously arranged at the isolation structure 13, and the isolation structure 13 includes a first isolation portion 131 and a second isolation portion 132 that are separately arranged. The light-emitting layer 142 is continuously arranged at the position where the first isolation portion 131 is located, so that the electrical signal can be transmitted laterally at the first isolation portion 131, maintaining a lower impedance path, so that the voltage when the driving current passes through the second electrode layer 143 is reduced, thereby reducing the overall power consumption of the display panel 1; and, by arranging the light-emitting layer 142 to be disconnected at the position where the second isolation portion 132 is located, the charge transfer path between adjacent pixels can be isolated, thereby avoiding the phenomenon of cross-pixel stealing.

[0060] Please combine Figure 1 and Figure 4 ;in, Figure 4 The embodiments of the present application provide Figure 1 Schematic diagram of the second enlarged structure at A in the middle.

[0061] In one embodiment, the light-emitting layer 142 includes a first light-emitting portion 1421, a charge generation layer 1422 and a second light-emitting portion 1423 which are stacked; wherein the first light-emitting portion 1421, the charge generation layer 1422 and the second light-emitting portion 1423 are continuously arranged at the position where the first isolation portion 131 is located, and the first light-emitting portion 1421, the charge generation layer 1422 and the second light-emitting portion 1423 are disconnected at the position where the second isolation portion 132 is located.

[0062] It should be noted that in order to further improve the efficiency and life of OLED devices, the tandem light emitting technology (Tandem) came into being. Figure 5 , Figure 6 as well as Figure 7 ;in, Figure 5 is another structural schematic diagram of a display panel in the related art; Figure 6 is an equivalent circuit diagram of a light emitting device in the related art; Figure 7 Another equivalent circuit diagram of a light emitting device in the related art.

[0063] In the related art, the display panel 3 can be an OLED light-emitting device, and the display panel 3 includes a stacked anode 31, a hole transport layer 32, a first light-emitting layer 33, an n-type charge generation layer 34, a p-type charge generation layer 35, a second light-emitting layer 36 and a cathode 37; since the n-type charge generation layer 34 has a strong ability to generate and separate electrons, it is easy to cause the phenomenon of stealing light between adjacent pixels. Therefore, the related art often uses a bottom cut structure to isolate the n-type charge generation layer 34 between adjacent pixels to reduce the probability of stealing light. However, the isolation process is also easy to cause a short circuit between the n-type charge generation layer 34 and the cathode 37, affecting the display effect of the display panel 1.

[0064] It can be understood that in this embodiment, the first light-emitting portion 1421, the charge generation layer 1422 and the second light-emitting portion 1423 are continuously arranged at the position where the first isolation portion 131 is located, and the second electrode layer 143 is continuously arranged at the isolation structure 13, thereby helping to ensure the continuity of the light-emitting layer 142 at the position where the first isolation portion 131 is located, and the second electrode layer 143 has good electrical contact with the light-emitting layer 142 at the position where the first isolation portion 131 is located, and the second electrode layer 143 is not in contact with the charge generation layer 1422 at the position where the first isolation portion 131 is located, thereby avoiding a short circuit between the charge generation layer 1422 and the second electrode layer 143, thereby improving the display effect of the display panel 1.

[0065] Please combine Figure 1 , Figure 2 and Figure 8 ;in, Figure 8 A schematic diagram of the structure of the isolation structure provided in the embodiment of the present application;

[0066] In one embodiment, the width of the first isolation portion 131 away from the substrate 11 is greater than the width of the first isolation portion 131 close to the substrate 11; the width of the second isolation portion 132 away from the substrate 11 is less than the width of the second isolation portion 132 close to the substrate 11.

[0067] Specifically, in the direction from the substrate 11 to the isolation structure 13, the width of the first isolation portion 131 gradually decreases, and the cross-sectional shape of the first isolation portion 131 is a structure that is narrow at the top and wide at the bottom. The narrower top design can reduce the risk of breakage of the light-emitting layer 142, and the light-emitting layer 142 can more easily cross the narrower portion without being easily disconnected, which helps to ensure the continuity of the light-emitting layer 142 at the location of the first isolation portion 131, and further helps to ensure good electrical contact between the second electrode layer 143 and the light-emitting layer 142 at the location of the first isolation portion 131, thereby reducing the impedance of the second electrode layer 143 and optimizing the power consumption of the display panel 1; at the same time, the wider bottom design enables the first isolation portion 131 to have better structural support on the pixel definition layer 12, which helps to improve the stability of the structure.

[0068] In the direction from the substrate 11 to the isolation structure 13, the width of the second isolation portion 132 gradually increases, and the cross-sectional shape of the second isolation portion 132 is a structure that is wide at the top and narrow at the bottom, so that the second isolation portion 132 has a wider surface area at its top, thereby more effectively blocking the continuity of the light-emitting layer 142 at the location of the second isolation portion 132, helping to ensure that the light-emitting layer 142 is disconnected at the location of the second isolation portion 132, thereby effectively enhancing the isolation effect on lateral charges and further reducing the phenomenon of cross-pixel stealing.

[0069] Please continue to combine Figure 1 , Figure 2 and Figure 8 In one embodiment, in a direction perpendicular to the substrate 11, the shape of the cross section of the first isolation portion 131 includes but is not limited to a right trapezoid, and the shape of the cross section of the second isolation portion 132 includes but is not limited to an inverted trapezoid.

[0070] Specifically, the light-emitting layer 142 is arranged on the pixel definition layer 12 and covers the isolation structure 13, that is, in the manufacturing process of the display panel 1, the isolation structure 13 is manufactured first, and then the light-emitting layer 142 is manufactured; the first isolation portion 131 includes a first side surface 1311, a first bottom surface 1312 and a first top surface 1313, the first bottom surface 1312 is located on the side of the first isolation portion 131 close to the substrate 11, and the first top surface 1313 is located on the side of the first isolation portion 131 away from the substrate 11.

[0071] It can be understood that, in this embodiment, by being arranged in a direction perpendicular to the substrate 11, the shape of the cross section of the first isolation portion 131 includes but is not limited to a right trapezoid, so that the light-emitting layer 142 can be well deposited at the corresponding positions of the first side surface 1311 and the first top surface 1313 of the first isolation portion 131, and there will be no local thinning or breakage phenomenon, thereby ensuring the reliability of the continuous arrangement of the light-emitting layer 142 at the position of the first isolation portion 131.

[0072] The second isolation portion 132 includes a second side surface 1321 , a second bottom surface 1322 , and a second top surface 1323 . The second bottom surface 1322 is located on a side of the second isolation portion 132 close to the substrate 11 , and the second top surface 1323 is located on a side of the first isolation portion 131 away from the substrate 11 .

[0073] It can be understood that, in this embodiment, by being arranged in a direction perpendicular to the substrate 11, the shape of the cross-section of the second isolation portion 132 includes but is not limited to an inverted trapezoid, so that the light-emitting layer 142 can only be deposited at a position corresponding to the second top surface 1323 of the second isolation portion 132, that is, the light-emitting layer 142 is disconnected at the connection between the second side surface 1321 and the first top surface 1313, thereby ensuring that the light-emitting layer 142 is disconnected at the second isolation portion 132, and the charge transfer path between adjacent pixels is effectively prevented through physical isolation.

[0074] Please continue to combine Figure 1 , Figure 2 and Figure 8 In one embodiment, there is a first angle α between the first side surface 1311 and the first bottom surface 1312, and the first angle α is an acute angle; there is a second angle β between the second side surface 1321 and the second bottom surface 1322, and the second angle β is an obtuse angle.

[0075] Specifically, the first angle α may be the slope angle of the first side surface 1311 of the first isolation portion 131, and the range of the first angle α is greater than or equal to 55 degrees and less than or equal to 75 degrees; it can be understood that in this embodiment, the first angle α is an acute angle, and by controlling the size of the first angle α, the first side surface 1311 can be made more inclined or steeper, so that the luminescent material can be better extended along the first side surface 1311 during deposition, reducing the pushing of the luminescent material on the first side surface 1311, and avoiding the phenomenon that the luminescent layer 142 is locally too thin or broken at the edge or sharp transition of the first isolation portion 131.

[0076] The second angle β can be the slope angle of the second side surface 1321 of the second isolation portion 132, and the range of the second angle β is greater than or equal to 100 degrees and less than or equal to 120 degrees; it can be understood that in this embodiment, the second angle β is an obtuse angle. By controlling the size of the second angle β, the width of the second top surface 1323 can be controlled, and then the size of the disconnection area of ​​the second isolation portion 132 corresponding to the light-emitting layer 142 can be controlled, so as to form a more effective isolation structure 13, which further prevents the lateral diffusion of charges.

[0077] Please continue reading Figure 2 and Figure 8 In one embodiment, a spacing H1 between a side of the first isolation portion 131 away from the pixel definition layer 12 and the pixel definition layer 12 is greater than or equal to 1.2 microns and less than or equal to 1.8 microns; a spacing H2 between a side of the second isolation portion 132 away from the pixel definition layer 12 and the pixel definition layer 12 is greater than or equal to 1 micron and less than or equal to 2 microns; a spacing H2 between a side of the second isolation portion 132 away from the pixel definition layer 12 and the pixel definition layer 12 is greater than or equal to a spacing H1 between a side of the first isolation portion 131 away from the pixel definition layer 12 and the pixel definition layer 12, thereby enhancing the ability of the second isolation portion 132 to block the light-emitting layer 14.

[0078] It should be noted that, compared with the case where the isolation structure 13 is not provided, in this embodiment, the light-emitting layer 142 is continuously provided at the position of the first isolation portion 131, and a first angle α is provided between the first side surface 1311 and the first bottom surface 1312 of the first isolation portion 131. Then, the path that can be extended by providing the first isolation portion 131 is 2×(H1 / tan(α)).

[0079] Among them, H1 is the thickness of the first isolation portion 131, and α is the first angle α between the first side surface 1311 and the first bottom surface 1312 of the first isolation portion 131; wherein, this embodiment takes the thickness of the first isolation portion 131 as 1.5 microns and the first angle α between the first side surface 1311 and the first bottom surface 1312 as 65 degrees as an example to illustrate the technical solution of the present application, that is, the path that the first isolation portion 131 can be extended is 2×(1.5 / tan(65°))=1.5 microns.

[0080] It can be understood that in this embodiment, the second electrode layer 143 is continuously arranged at the isolation structure 13, and the isolation structure 13 includes a first isolation portion 131 and a second isolation portion 132 that are separately arranged. The light-emitting layer 142 is continuously arranged at the position where the first isolation portion 131 is located, thereby extending the charge transmission path of the light-emitting layer 142 at the position where the first isolation portion 131 is located, thereby hindering the lateral charge transmission.

[0081] At the same time, by arranging the first isolation portion 131 on the side of the pixel definition layer 12 away from the substrate 11, the first isolation portion 131 is located in the non-opening area 1202, so that the width of the non-opening portion of the pixel definition layer 12 can be changed by controlling the width of the first isolation portion 131, thereby adjusting the pixel density of the display panel 1, for example, increasing the high-resolution WQ-level PDL Gap to FHD+, or reducing the width (gap) of the non-opening area 1202 domain of the pixel definition layer 12 from the design standard of WQ resolution to the design standard of FHD+ resolution, or reducing the width (gap) of the non-opening area 1202 domain of the pixel definition layer 12 from the design standard of FHD+ resolution to the design standard of FHD resolution, which helps to reduce pixel density, reduce manufacturing costs and difficulty, and improve the problems of crosstalk and light leakage between two adjacent pixels.

[0082] See also Fig. 9 , is a schematic top view of the display panel provided in an embodiment of the present application.

[0083] In one embodiment, the display panel 1 includes a plurality of sub-pixels 15 and a plurality of the isolation structures 13; wherein, a plurality of the isolation structures 13 are arranged around at least one of the sub-pixels 15, and in one of the sub-pixels 15 corresponding to the plurality of the isolation structures 13, the first isolation portion 131 is located on the side of the second isolation portion 132 away from the sub-pixel 15, or the first isolation portion 131 is located on the side of the second isolation portion 132 close to the sub-pixel 15, thereby reducing lateral leakage, that is, charges unnecessarily flow into a pixel area that should not be bright, thereby improving the accuracy and stability of the display; at the same time, by setting the position of the first isolation portion 131, it can be ensured that the second electrode layer 143 and the light-emitting layer 142 have good electrical contact, thereby reducing the impedance of the second electrode layer 143 and improving the luminous efficiency of the display panel 1.

[0084] The plurality of isolation structures 13 may be disposed on a plurality of adjacent virtual quadrilaterals 16 and arranged in a honeycomb lattice, each isolation structure 13 being disposed at a vertex position of the virtual quadrilateral 16 , and at least one sub-pixel 15 being disposed at a corresponding center position of a virtual quadrilateral 16 .

[0085] Specifically, the display panel 1 includes a plurality of first sub-pixels 151 displaying a first color, a plurality of second sub-pixels 152 displaying a second color, and a plurality of third sub-pixels 153 displaying a third color, and the first color, the second color, and the third color are all different; this embodiment takes the first color being red, the second color being green, and the third color being blue as an example to illustrate the technical solution of the present application.

[0086] A plurality of the isolation structures 13 are arranged around a first sub-pixel 151, and the first isolation portion 131 is located on a side of the second isolation portion 132 close to the first sub-pixel 151; a plurality of the isolation structures 13 are arranged around a second sub-pixel 152, and the first isolation portion 131 is located on a side of the second isolation portion 132 away from the second sub-pixel 152; a plurality of the isolation structures 13 are arranged around a third sub-pixel 153, and the first isolation portion 131 is located on a side of the second isolation portion 132 close to the third sub-pixel 153; wherein the luminous efficiency of the second sub-pixel 152 is greater than the luminous efficiency of any one of the first sub-pixel 151 and the third sub-pixel 153.

[0087] It can be understood that since the luminous efficiency of the second sub-pixel 152 is greater than the luminous efficiency of any one of the first sub-pixel 151 and the third sub-pixel 153, by setting the first isolation portion 131 at a position close to the high-efficiency sub-pixel 15 (the second sub-pixel 152), the flow of charge and light can be better controlled, and the excessive luminescence of the high-efficiency sub-pixel 15 can be reduced, thereby balancing the overall display brightness; and setting the first isolation portion 131 at a position away from the inefficient sub-pixel 15 (such as the first sub-pixel 151 and the third sub-pixel 153) can increase the luminous flux of these areas, compensate for their lower luminous efficiency, and achieve overall brightness balance. That is, this embodiment can make the brightness and color performance of the entire panel more uniform by adjusting the luminous amount and efficiency of each color sub-pixel 15, thereby avoiding display unevenness caused by differences in luminous efficiency of sub-pixels 15 of different colors.

[0088] See also Fig.10 , is a schematic diagram of the structure of the display device provided in an embodiment of the present application.

[0089] This embodiment further provides a display device 4, which includes a terminal body 4A and a display panel 1, wherein the terminal body 4A and the display panel 1 are combined into one body; wherein the display panel 1 can be the display panel described in any of the above embodiments.

[0090] It can be understood that the display panel 1 has been described in detail in the above embodiment and will not be repeated here; the terminal body 4A may include a middle frame, which is combined with the display panel as a whole to provide support, fixation and protection for the display panel.

[0091] In specific applications, the display device can be at least one of a smart phone, tablet computer, mobile phone, video phone, e-book reader, desktop computer, laptop, netbook, workstation, server, personal digital assistant, portable media player, MP3 player, mobile medical machine, camera, game console, digital camera, car navigation system, electronic billboard, ATM or wearable device, etc., which has a display function.

[0092] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0093] The above is a detailed introduction to a display panel and a display device provided in the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solutions and core ideas of the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A display panel, characterized in that: include: substrate; A first electrode layer is disposed on one side of the substrate; A pixel definition layer is disposed on one side of the substrate, wherein the pixel definition layer includes a pixel opening area and a non-opening area disposed between two adjacent pixel opening areas; An isolation structure, disposed on a side of the pixel definition layer away from the substrate, the isolation structure being located in the non-opening area; A light-emitting layer, disposed on the pixel definition layer and covering the isolation structure; A second electrode layer is disposed on a side of the light-emitting layer away from the pixel definition layer, and the second electrode layer is continuously disposed at the isolation structure; The isolation structure includes a first isolation portion and a second isolation portion that are separately arranged, the light-emitting layer is continuously arranged at the location where the first isolation portion is located, and the light-emitting layer is disconnected at the location where the second isolation portion is located.

2. The display panel according to claim 1, characterized in that: The width of the first isolation portion at a side away from the substrate is smaller than the width of the first isolation portion at a side close to the substrate, and the width of the second isolation portion at a side away from the substrate is larger than the width of the second isolation portion at a side close to the substrate.

3. The display panel according to claim 2, characterized in that: In a direction from the substrate to the isolation structure, the width of the first isolation portion gradually decreases, and the width of the second isolation portion gradually increases.

4. The display panel according to claim 3, characterized in that: In a direction perpendicular to the substrate, a cross-section of the first isolating portion is in the shape of a regular trapezoid, and a cross-section of the second isolating portion is in the shape of an inverted trapezoid.

5. The display panel according to any one of claims 1 to 4, characterized in that: The first isolation portion includes a first side surface and a first bottom surface, the first bottom surface is located on a side of the first isolation portion close to the substrate, and a first angle is formed between the first side surface and the first bottom surface; The second isolation portion includes a second side surface and a second bottom surface, the second bottom surface is located on a side of the second isolation portion close to the substrate, and a second angle is formed between the second side surface and the second bottom surface; The range of the first angle is greater than or equal to 55 degrees and less than or equal to 75 degrees; the range of the second angle is greater than or equal to 100 degrees and less than or equal to 120 degrees.

6. The display panel according to any one of claims 1 to 4, characterized in that: The distance between the side of the first isolation portion away from the pixel definition layer and the pixel definition layer is greater than or equal to 1.2 microns and less than or equal to 1.8 microns; the distance between the side of the second isolation portion away from the pixel definition layer and the pixel definition layer is greater than or equal to 1 micron and less than or equal to 2 microns.

7. The display panel according to any one of claims 1 to 4, characterized in that: The display panel comprises a plurality of sub-pixels and a plurality of the isolation structures; Among them, a plurality of the isolation structures are arranged around at least one of the sub-pixels, and in a sub-pixel corresponding to the plurality of the isolation structures, the first isolation portion is located on a side of the second isolation portion away from the sub-pixel, or the first isolation portion is located on a side of the second isolation portion close to the sub-pixel.

8. The display panel according to claim 7, characterized in that: The display panel includes a plurality of first sub-pixels displaying a first color, a plurality of second sub-pixels displaying a second color, and a plurality of third sub-pixels displaying a third color, wherein the first color, the second color, and the third color are all different; A plurality of the isolation structures are arranged around a first sub-pixel, and the first isolation portion is located on a side of the second isolation portion close to the first sub-pixel; A plurality of the isolation structures are arranged around a second sub-pixel, and the first isolation portion is located on a side of the second isolation portion away from the second sub-pixel; A plurality of the isolation structures are arranged around a third sub-pixel, and the first isolation portion is located on a side of the second isolation portion close to the third sub-pixel; The luminous efficiency of the second sub-pixel is greater than the luminous efficiency of any one of the first sub-pixel and the third sub-pixel.

9. The display panel according to claim 1, characterized in that: The light-emitting layer includes a first light-emitting portion, a charge generation layer and a second light-emitting portion which are stacked; The first light-emitting portion, the charge generation layer and the second light-emitting portion are all continuously arranged at the position where the first isolation portion is located, and the first light-emitting portion, the charge generation layer and the second light-emitting portion are all disconnectedly arranged at the position where the second isolation portion is located.

10. A display device, characterized in that: The display device comprises the display panel according to any one of claims 1 to 9.

Images