Preparation method of display panel, display panel and display device

Abstract

The embodiment of the invention provides a preparation method of a display panel, the display panel and a display device, and the display panel comprises a substrate; the isolation structure is arranged on one side of the substrate and encloses a plurality of isolation openings; the light-emitting functional layer comprises light-emitting units located in the isolation openings; the first packaging layer comprises a first sub-part located on the side, away from the substrate, of the isolation structure; the light filtering layer comprises light filtering units which are at least partially located in the isolation openings and located on the sides, away from the substrate, of the light emitting units; the touch control layer comprises a plurality of touch control units, each touch control unit is located on the side, away from the substrate, of the first sub-part, and the touch control units are located between the adjacent light filtering units. According to the display panel, the touch units of the touch layer are arranged on the sides, away from the substrate, of the first sub-parts, and the touch units are located between the adjacent light filtering units, so that the touch function of the display panel is achieved while light emitting is prevented from being affected, the thickness of a film layer of the display panel is effectively reduced, and the use performance of the display panel is improved.

Description

Technical Field

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

[0002] Organic Light Emitting Diode (OLED) and flat panel display devices based on technologies such as Light Emitting Diode (LED) have been widely used in various consumer electronic products such as mobile phones, televisions, laptops, desktop computers, etc. due to their advantages such as high image quality, power saving, thin body and wide application range, becoming the mainstream in display devices.

[0003] However, the process performance of current OLED display products needs to be improved. Summary of the invention

[0004] The embodiments of the present application provide a method for manufacturing a display panel, a display panel, and a display device, aiming to improve the process performance of the display panel.

[0005] An embodiment of one aspect of the present application provides a display panel, comprising: a substrate; an isolation structure, which is arranged on one side of the substrate and encloses a plurality of isolation openings; a light-emitting functional layer, comprising a light-emitting unit located at each of the isolation openings; a first encapsulation layer, comprising a first sub-portion located at a side of the isolation structure away from the substrate; a filter layer, comprising a filter unit at least partially located at the isolation opening and located at a side of the light-emitting unit away from the substrate; a touch layer, wherein the touch layer comprises a plurality of touch units, each of the touch units is located at a side of the first sub-portion away from the substrate, and the touch unit is located between adjacent filter units.

[0006] According to any embodiment of the present application, a surface of the touch control unit on a side facing away from the substrate has a first region and a second region adjacent to each other, and the roughness of the first region is greater than the roughness of the second region.

[0007] According to any embodiment described in one aspect of the present application, a groove is provided on a surface of the touch unit facing away from the substrate; preferably, along a direction perpendicular to the plane where the substrate is located, the cross-section of the groove is at least one of a polygon, a sector, and a semicircle.

[0008] According to any of the embodiments described in one aspect of the present application, it further includes an anti-reflection layer disposed on a side of the touch unit away from the substrate, and the reflectivity of the material of the anti-reflection layer is lower than the reflectivity of the material of the touch unit.

[0009] According to any embodiment described in one aspect of the present application, the first encapsulation layer includes a first part located between the filter layer and the light-emitting functional layer and a second part connected to the peripheral side of the first part and extending to the side of the isolation structure away from the substrate; the second part includes the first sub-part; preferably, the material of the first encapsulation layer includes an inorganic material; preferably, the number of the first parts is multiple, and each first part is used to encapsulate the corresponding light-emitting units; preferably, the multiple first parts are arranged at intervals, and the orthographic projection of the first part on the substrate is within the orthographic projection range of the filter unit on the substrate; preferably, the orthographic projection of the second part on the substrate covers the orthographic projection of the surface of the isolation structure on the substrate away from the substrate; preferably, the orthographic projection of the second part on the substrate covers the orthographic projection of the touch layer on the substrate.

[0010] According to any implementation of one aspect of the present application, the light transmittance of the touch unit is less than or equal to 50%; preferably, the material of the touch unit includes metal or metal oxide.

[0011] According to any embodiment described in one aspect of the present application, the filter unit located on the side of the isolation structure facing away from the substrate has a first top surface facing away from the substrate, and the touch layer has a second top surface facing away from the substrate; along a direction perpendicular to the plane where the substrate is located, the first top surface is located on the side of the second top surface facing the substrate, or the first top surface is flush with the second top surface.

[0012] According to any embodiment described in one aspect of the present application, the isolation structure includes a first sublayer and a second sublayer stacked in a direction away from the substrate, the orthographic projection of the first sublayer on the substrate is located within the orthographic projection of the second sublayer on the substrate; preferably, the material of the isolation structure includes a conductive material, a first electrode is arranged between the light-emitting unit and the filter unit, and the first electrode is electrically connected to the isolation structure; preferably, it also includes a pixel definition layer, the pixel definition layer includes a pixel defining portion and a pixel opening, the orthographic projection of the pixel opening on the substrate and the orthographic projection of the isolation opening on the substrate at least partially overlap, and the light-emitting unit is located at the pixel opening; preferably, the isolation structure is located on the side of the pixel defining portion away from the substrate, or, a clearance opening is opened on the pixel defining portion, and the isolation structure is located at the clearance opening.

[0013] According to any embodiment described in one aspect of the present application, it further includes a second encapsulation layer, which is located on the side of the filter layer away from the substrate; preferably, the material of the second encapsulation layer includes an organic material; preferably, it further includes a third encapsulation layer, which is located on the side of the second encapsulation layer away from the substrate; preferably, the material of the third encapsulation layer includes an inorganic material; preferably, the materials of the first encapsulation layer and the third encapsulation layer are the same.

[0014] According to any embodiment described in one aspect of the present application, the filter unit includes a third part located on the side of the light-emitting unit away from the substrate and a fourth part connected to the peripheral side of the third part and extending to the side of the isolation structure away from the substrate; the touch unit is located between adjacent fourth parts.

[0015] Another aspect of the present application provides a method for preparing a display panel, including: preparing an isolation structure on a substrate, the isolation structure enclosing a plurality of isolation openings; preparing a light-emitting unit of a light-emitting functional layer in the isolation openings; preparing a first sub-portion of a first encapsulation layer on a side of the isolation structure away from the substrate; separately preparing a filter unit of a filter layer and a touch unit of a touch layer, preparing a filter unit on a side of the light-emitting unit away from the substrate in the isolation openings, and preparing a touch unit on a side of the first sub-portion away from the substrate.

[0016] According to any embodiment described in another aspect of the present application, the steps of separately preparing the filter unit of the filter layer and the touch unit of the touch layer include: preparing the filter unit of the filter layer on a side of the light-emitting unit in the isolation opening facing away from the substrate; preparing the touch unit of the touch layer on a side of the first sub-portion facing away from the substrate, and the touch unit is located between adjacent filter units; or, the steps of separately preparing the filter unit of the filter layer and the touch unit of the touch layer include: preparing the touch unit of the touch layer on a side of the first sub-portion facing away from the substrate; preparing the filter unit of the filter layer on a side of the light-emitting unit in the isolation opening facing away from the substrate.

[0017] According to any embodiment described in another aspect of the present application, in the steps of separately preparing the filter unit of the filter layer and the touch unit of the touch layer, it also includes: roughening the surface of the touch layer on the side facing away from the substrate; or, forming a groove on the surface of the touch layer on the side facing away from the substrate; or, forming an anti-reflection layer on the surface of the touch layer on the side facing away from the substrate.

[0018] According to another aspect of the present application, there is provided a display device, comprising the display panel described in any one of the above embodiments or a display panel prepared by the display panel preparation method described in any one of the above embodiments.

[0019] In the display panel provided in the embodiment of the present application, the display panel includes a substrate, an isolation structure, a light-emitting layer and a filter layer. The isolation structure is used to enclose and form an isolation opening, so that the light-emitting unit of the light-emitting layer is located in the isolation opening, thereby improving the problem of light interference between light-emitting units of different colors. A filter unit is provided on the light-emitting unit. By providing the filter unit to filter stray light, the light output efficiency of the display panel can be improved. In addition, since the filter unit is also located in the isolation opening and on the light-emitting unit, when the light-emitting units are prepared sequentially by etching and other processes, before preparing the rear light-emitting unit, the filter unit can be covered on the front light-emitting unit. When the rear light-emitting unit is prepared by etching, due to the protection of the filter unit, the influence on the front light-emitting unit can be reduced, the yield of the front light-emitting unit can be improved, and the process performance of the display panel can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Other features, objects and advantages of the present application will become more apparent by reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings, in which the same or similar reference numerals represent the same or similar features.

[0021] Figure 1 is a structural schematic diagram of a display panel provided in an embodiment of the present application;

[0022] Figure 2 In one example Figure 1 Sectional view at AA in the middle;

[0023] Figure 3 In another example Figure 1 Sectional view at AA in the middle;

[0024] Figure 4 yes Figure 3 A schematic diagram of a local enlarged structure;

[0025] Figure 5 In another example Figure 1 Sectional view at AA in the middle;

[0026] Figure 6 is a schematic diagram of the structure of another display panel provided in an embodiment of the present application;

[0027] Figure 7 It is a schematic diagram of a display panel manufacturing method provided in an embodiment of the present application;

[0028] Figure 8 is a cross-sectional schematic diagram of a structure obtained in step S110 in a method for preparing a display panel provided by an embodiment of the present invention;

[0029] Fig. 9is a cross-sectional schematic diagram of a structure obtained in step S120 in a method for preparing a display panel provided by an embodiment of the present invention;

[0030] Fig.10 It is a schematic cross-sectional view of a structure obtained in step S130 in a method for preparing a display panel provided in an embodiment of the present invention.

[0031] Description of reference numerals:

[0032] 100, substrate; 110, first electrode; 120, second electrode;

[0033] 200, isolation structure; 210, isolation opening; 211, first isolation opening; 212, second isolation opening; 213, third isolation opening; 201, first sublayer; 202, second sublayer;

[0034] 300, pixel definition layer; 310, pixel definition portion; 320, pixel opening; 330, light emitting unit; 331, first light emitting unit; 332, second light emitting unit; 333, third light emitting unit;

[0035] 400, filter layer; 410, filter unit; 411, first filter unit; 412, second filter unit; 413, third filter unit; 421, third part; 422, fourth part;

[0036] 500, first encapsulation layer; 510, first part; 520, second part; 521, first sub-part;

[0037] 600, touch layer; 610, slotting;

[0038] 700, a second encapsulation layer; 800, a third encapsulation layer;

[0039] 800. Anti-reflection layer. DETAILED DESCRIPTION

[0040] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In the detailed description below, many specific details are proposed to provide a comprehensive understanding of the present application. However, it is obvious to those skilled in the art that the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating examples of the present application. In the accompanying drawings and the following description, at least some of the known structures and technologies are not shown to avoid unnecessary ambiguity in the present application; and, for clarity, the size of some structures may be exaggerated. In addition, the features, structures or characteristics described below may be combined in one or more embodiments in any suitable manner.

[0041] In the description of the present application, it should be noted that, unless otherwise specified, "multiple" means more than two; the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating directions or positional relationships, are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0042] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of the embodiments of the present application. In the description of the present application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0043] In the process of implementing the present application, the inventors discovered the following problems in the related art: some display panels use an oncell touch structure, which results in a large number of mask plates required for the display panel, high cost, and a large film thickness.

[0044] Patent applications CN118251982A, 202410864269.8, PCT / CN2024 / 098407, PCT / CN2024 / 102783, PCT / CN2024 / 098217, PCT / CN2024 / 099419, and PCT / CN2024 / 099072 record relevant technical solutions for isolation structures, and their contents are incorporated into this application by reference for reference.

[0045] In order to better understand this application, Figures 1 to 10 The manufacturing method of the display panel, the display panel and the display device according to the embodiments of the present application are described in detail.

[0046] Please also read Figure 1 to Figure 2 , Figure 1 A schematic diagram of the structure of a display panel provided in an embodiment of the present application; Figure 2 yes Figure 1 Schematic diagram of the local enlarged structure at AA in the middle.

[0047] like Figure 1 and Figure 2As shown, the present application provides a display panel, including: a substrate 100; an isolation structure 200, which is arranged on one side of the substrate 100 and encloses a plurality of isolation openings 210; a light-emitting functional layer, including a light-emitting unit 330 located at each isolation opening 210; a first encapsulation layer 500, including a first sub-portion 521 located on the side of the isolation structure 200 away from the substrate 100; a filter layer 400, including a filter unit 410 at least partially located in the isolation opening 210 and located on the side of the light-emitting unit 330 away from the substrate 100; a touch layer 600, the touch layer 600 including a plurality of touch units, each of which is located on the side of the first sub-portion 521 away from the substrate 100, and the touch unit is located between adjacent filter units 410.

[0048] The display panel provided by the embodiment of the present invention includes a substrate 100, an isolation structure 200, a light-emitting functional layer, a filter layer 400 and a touch layer 600. The isolation structure 200 is used to enclose and form an isolation opening 210, so that the light-emitting unit 330 of the light-emitting layer is located in the isolation opening 210, thereby improving the problem of light interference between light-emitting units 330 of different colors. A filter unit 410 is provided on the light-emitting unit 330. By providing the filter unit 410 to filter stray light, the light extraction efficiency of the display panel can be improved. Since the filter unit 410 is also located in the isolation opening 210 and is located on the light-emitting unit 330, when the light-emitting unit 330 is prepared in sequence by etching or other processes, before preparing the rear light-emitting unit 330, the filter unit 410 can be covered on the front light-emitting unit 330. When the rear light-emitting unit 330 is prepared by etching, due to the protection of the filter unit 410, the impact on the front light-emitting unit 330 can be reduced, the yield of the front light-emitting unit 330 can be improved, and the process performance of the display panel can be improved. In addition, by arranging the touch unit of the touch layer 600 on the side of the first sub-section 521 away from the substrate 100, and the touch unit is located between adjacent filter units 410, the touch function of the display panel can be realized while avoiding affecting the light output, the thickness of the display panel film layer is effectively reduced, and the performance of the display panel is improved.

[0049] In this embodiment, the touch control unit can be formed on the surface of the first sub-portion 521 facing away from the substrate 100, and is arranged corresponding to the isolation structure 200. The touch control unit can be prepared by a material with low light transmittance to achieve shielding between the light outputs of adjacent light-emitting units 330 to avoid mutual interference between the light outputs of adjacent light-emitting units 330. Optionally, the transmittance of the touch control unit is less than or equal to 50%. Specifically, the transmittance of the touch control unit can be adjusted by selecting the material of the touch control unit. For example, the material of the touch control unit includes metal or metal oxide to ensure the conductivity of the touch control unit. Of course, the touch control unit can also be made of other conductive materials as long as the conductivity and transmittance requirements are met.

[0050] Optionally, the touch control unit in the present application may adopt a self-capacitance structure to reduce the thickness of the film layer and facilitate molding.

[0051] Optionally, the light-emitting unit 330 includes a first light-emitting unit 331, a second light-emitting unit 332, and a third light-emitting unit 333, and the light-emitting colors of the first light-emitting unit 331, the second light-emitting unit 332, and the third light-emitting unit 333 are different, so as to realize the color display of the display panel. The filter unit 410 includes a first filter unit 411, a second filter unit 412, and a third filter unit 413, the first filter unit 411 is located on the side of the first light-emitting unit 331 away from the substrate 100, the second filter unit 412 is located on the side of the second light-emitting unit 332 away from the substrate 100, and the third filter unit 413 is located on the side of the third light-emitting unit 333 away from the substrate 100. Optionally, the isolation opening 210 includes a first isolation opening 211 for accommodating the first light-emitting unit 331, a second isolation opening 212 for accommodating the second light-emitting unit 332, and a third isolation opening 213 for accommodating the third light-emitting unit 333.

[0052] Optionally, preparing the light emitting units 330 in sequence means preparing a plurality of first light emitting units 331, a plurality of second light emitting units 332 and a plurality of third light emitting units 333 in sequence. The front light emitting unit 330 refers to the light emitting unit 330 prepared in front, and the rear light emitting unit 330 refers to the light emitting unit 330 prepared in the rear.

[0053] A plurality of first light-emitting units 331 can be prepared and formed in the same process step, a plurality of second light-emitting units 332 can be prepared and formed in the same process step, and a plurality of third light-emitting units 333 can be prepared and formed in the same process step. Optionally, a plurality of first light-emitting units 331 can be prepared first, and then a plurality of second light-emitting units 332 can be prepared, and finally a plurality of third light-emitting units 333 can be prepared. In other embodiments, the first light-emitting unit 331, the second light-emitting unit 332, and the third light-emitting unit 333 can also be prepared in other orders.

[0054] When the second light-emitting unit 332 is prepared by an etching process, the second light-emitting material layer deposited on the first light-emitting unit 331 needs to be etched, and the etching process may affect the yield of the first light-emitting unit 331. In the embodiment of the present application, since the first light-emitting unit 331 is provided with the first filter unit 411, the first filter unit 411 can be prepared on the first light-emitting unit 331 before preparing the second light-emitting unit 332. When the second light-emitting material layer deposited on the first light-emitting unit 331 is etched, due to the protective effect of the first filter unit 411, the influence on the first light-emitting unit 331 can be improved, thereby improving the yield of the first light-emitting unit 331 and improving the process performance of the display panel.

[0055] Optionally, there are multiple ways to set the substrate 100. The substrate 100 may include a substrate and a first conductive layer, a second conductive layer, and a third conductive layer that are arranged on one side of the substrate and are stacked. An insulating layer is provided between adjacent conductive layers. Exemplarily, the substrate 100 includes a pixel driving circuit. The pixel driving circuit includes a transistor and a storage capacitor. The transistor includes a channel region, a gate, a source and a drain. The storage capacitor includes a first plate and a second plate. As an example, the gate and the first plate may be located in the first conductive layer, the second plate may be located in the second conductive layer, and the source and the drain may be located in the third conductive layer. Optionally, the substrate 100 may also include a fourth conductive layer, the fourth conductive layer is located on the side of the third conductive layer facing away from the substrate, and the fourth conductive layer may be provided with a connecting signal line.

[0056] Optionally, the display panel further includes a first electrode layer and a second electrode layer, the first electrode layer includes a plurality of first electrodes 110 arranged at intervals, each first electrode 110 is located on a side of each light-emitting unit 330 facing the substrate 100. The second electrode layer includes a plurality of second electrodes 120, each second electrode 120 is located on a side of each light-emitting unit 330 away from the substrate 100, and the first electrode 110 and the second electrode 120 work together to drive the light-emitting unit 330 to emit light. One of the first electrode 110 and the second electrode 120 is an anode, and the other is a cathode. The embodiment of the present application is described by taking the first electrode 110 as an anode and the second electrode 120 as a cathode.

[0057] Optionally, the filter unit 410 is located on a side of the second electrode 120 facing away from the substrate 100 to prevent the filter unit 410 from affecting the normal light emission of the light emitting unit 330 .

[0058] In some optional embodiments, a surface of the touch unit facing away from the substrate 100 has a first region and a second region adjacent to each other, and the roughness of the first region is greater than that of the second region.

[0059] It can be understood that roughness refers to the unevenness of the small spacing and tiny peaks and valleys of the processed surface, and the distance (wave distance) between the two peaks or two valleys is very small (below 1mm), which belongs to the microscopic geometric shape error. The smaller the surface roughness, the smoother the surface. Through the research of the inventor, it is found that the roughness of the surface of the touch unit on the side away from the substrate 100 will affect the reduction of the reflected light and refracted light of the external light at the touch unit. The greater the roughness, the smaller the reflectivity of the external light on the surface of the touch unit on the side away from the substrate 100, and the less likely it is that the touch unit will be visible. Therefore, in this embodiment, the roughness of the first area of ​​the touch unit can be improved by plasma treatment and other process forms, so that the roughness of the first area is greater than the roughness of the second area, thereby reducing the reflected light or refracted light of the external light on the surface of the touch unit on the side away from the substrate 100, avoiding the touch unit from being visible, and improving the integrated black effect of the display panel.

[0060] In addition to the above-mentioned method of adjusting the roughness, other methods may be used to reduce the reflected light or refracted light of the external light on the surface of the touch unit facing away from the substrate 100 .

[0061] See also Figures 2 to 4 In some optional embodiments, a groove 610 is provided on a surface of the touch unit facing away from the substrate 100 .

[0062] It should be noted that, in this embodiment, a larger groove 610 can be formed by etching or other means, so that external light is refracted and reflected in the groove 610, thereby reducing the refracted light of the external light emitted at the touch unit, avoiding the touch unit display being visible, and improving the integrated black effect of the display panel.

[0063] In this embodiment, along the direction perpendicular to the plane where the substrate 100 is located, the cross section of the slot 610 is at least one of a polygon, a sector, and a semicircle, as long as the incident light from the outside can be continuously refracted, reflected, and absorbed in the slot 610. The specific shape is not limited to the above examples. Optionally, the cross section of the slot 610 is an inverted triangle, so that more incident light from the outside can enter the slot 610.

[0064] See also Figure 5 In some optional embodiments, the display panel further includes an anti-reflection layer 800 disposed on a side of the touch unit facing away from the substrate 100 , and the reflectivity of the material of the anti-reflection layer 800 is lower than the reflectivity of the material of the touch unit.

[0065] It should be noted that the function of the anti-reflection layer 800 is to reduce or eliminate the reflected light on the surface of the touch unit facing away from the substrate 100. The anti-reflection layer 800 can be made of materials such as silicon nitride. As long as the reflectivity of the material of the anti-reflection layer 800 is less than the reflectivity of the material of the touch unit, the reflected light of external light at the touch unit can be reduced.

[0066] See also Figures 2 to 4 In some optional embodiments, the first encapsulation layer 500 includes a first portion 510 located between the filter layer 400 and the light-emitting functional layer, and a second portion 520 connected to the peripheral side of the first portion 510 and extending to the side of the isolation structure 200 away from the substrate 100, and the second portion 520 includes a first sub-portion 521.

[0067] In these optional embodiments, a portion of the first encapsulation layer 500 is located in the isolation opening 210 to provide encapsulation protection for the light-emitting unit 330, that is, the first portion 510, and the second portion 520 extends to the side of the isolation structure 200 away from the substrate 100 to increase the coverage area of ​​the first encapsulation layer 500 and increase the protection area of ​​the light-emitting unit 330. In addition, the boundary of the first encapsulation layer 500 is located on the isolation structure 200, and when the first encapsulation layer 500 is prepared by an etching process, it can improve the situation that the light-emitting unit 330 is not covered by the first encapsulation part due to over-etching caused by process errors.

[0068] It should be noted that the first sub-portion 521, i.e., a portion of the second portion 520 located on the side of the isolation structure 200 away from the substrate 100, is provided between the touch layer 600 and the isolation structure 200 to achieve insulation between the touch layer 600 and the isolation structure 200 to avoid mutual interference.

[0069] Optionally, the material of the first encapsulation layer 500 includes an inorganic material, so that the first encapsulation layer 500 has good compactness and a thin thickness.

[0070] Optionally, there are multiple first parts 510, and each first part 510 is used to encapsulate each light-emitting unit 330 to achieve independent encapsulation of the light-emitting unit 330. When one of the light-emitting units 330 is invaded by water and oxygen, impurities such as water and oxygen are prevented from moving along the first encapsulation layer 500 and affecting the yield of other light-emitting units 330.

[0071] Optionally, multiple first parts 510 are arranged at intervals, and the orthographic projection of the first part 510 on the substrate 100 is located within the orthographic projection range of the filter unit 410 on the substrate 100, so that the part of the filter unit 410 located in the isolation opening 210 can be separated from the light-emitting unit 330 by the first part 510 to avoid mutual interference.

[0072] Optionally, the orthographic projection of the second part 520 on the substrate 100 covers the orthographic projection of the side surface of the isolation structure 200 facing away from the substrate 100 on the substrate 100, that is, the size area of ​​the second part 520 is greater than or equal to the size area of ​​the side surface of the isolation structure 200 facing away from the substrate 100, so as to achieve coverage of the side surface of the isolation structure 200 facing away from the substrate 100.

[0073] Optionally, the orthographic projection of the second portion 520 on the substrate 100 covers the orthographic projection of the touch layer on the substrate 100 , that is, the size of the second portion 520 is greater than or equal to the size of the touch layer, so as to achieve insulation isolation between the touch layer and the isolation structure 200 .

[0074] See also Figure 3 to Figure 4 In some optional embodiments, the display panel further includes a second encapsulation layer 700 located on a side of the filter layer 400 facing away from the substrate 100 .

[0075] By providing the second encapsulation layer 700 , the second encapsulation layer 700 covers the plurality of second portions 520 , so that the encapsulation effect can be further improved, and the top surface of the second encapsulation layer 700 facing away from the substrate 100 is smoother than the top surfaces of the plurality of second portions 520 .

[0076] Optionally, the material of the second encapsulation layer 700 includes organic material, so that the second encapsulation layer 700 has an appropriate thickness, can flatten the surface of the touch unit and the filter unit 410, and improve the flatness of the display panel. Moreover, since the filter unit 410 is also an organic material, it has good adhesion to the second encapsulation layer 700, and effectively improves the phenomenon of the second encapsulation layer 700 and the isolation structure 200 or the first encapsulation layer 500 being bonded and separated.

[0077] See also Figure 3 to Figure 4 Optionally, the display panel further includes a third encapsulation layer 800 , and the third encapsulation layer 800 is located on a side of the second encapsulation layer 700 away from the substrate 100 , so as to further improve the encapsulation effect.

[0078] Optionally, the material of the third encapsulation layer 800 includes an inorganic material, so that the third encapsulation layer 800 has good compactness and a thin thickness.

[0079] Optionally, the first encapsulation layer 500 and the third encapsulation layer 800 are made of the same material, which can simplify the manufacturing process of the display panel.

[0080] In some optional embodiments, the filter unit 410 located on the side of the isolation structure 200 facing away from the substrate 100 has a first top surface facing away from the substrate 100, and the touch layer 600 has a second top surface facing away from the substrate 100; along the direction perpendicular to the plane where the substrate 100 is located, the first top surface is located on the side of the second top surface facing the substrate 100, or the first top surface and the second top surface are flush, that is, the first top surface and the second top surface are located in the same plane.

[0081] See also Figures 2 to 4 In these optional embodiments, the first top surface of the filter unit 410 facing away from the substrate 100 is not higher than the second top surface of the touch layer 600 facing away from the substrate 100, which can ensure the flatness from the first top surface to the second top surface a, and improve the yield of other film layers when preparing other film layers later. Specifically, along the direction perpendicular to the plane where the substrate 100 is located, the first top surface is located on the side of the second top surface facing the substrate 100, that is, the first top surface of the filter unit 410 facing away from the substrate 100 is lower than the second top surface of the touch layer 600 facing away from the substrate 100, so as to ensure the touch performance of the touch layer 600. Alternatively, the first top surface and the second top surface are flush to improve the flatness of the film layer.

[0082] See also Figures 2 to 4 In some optional embodiments, the isolation structure 200 includes a first sublayer 201 and a second sublayer 202 stacked in a direction away from the substrate 100 , and the orthographic projection of the first sublayer 201 on the substrate 100 is located within the orthographic projection of the second sublayer 202 on the substrate 100 .

[0083] In these optional embodiments, the size of the first sublayer 201 is smaller than the size of the second sublayer 202, so that a recess can be formed under the second sublayer 202. When the light-emitting material layer falls on the isolation structure 200, the light-emitting material layer can be broken on the peripheral side of the isolation structure 200, thereby forming light-emitting units 330 located in each isolation opening 210 and independent of each other, which can simplify the preparation process of the light-emitting unit 330.

[0084] Optionally, the material of the isolation structure 200 includes a conductive material, a second electrode 120 is disposed between the light emitting unit 330 and the filter unit 410, and the second electrode 120 is electrically connected to the isolation structure 200, so that a plurality of second electrodes 120 can be interconnected through the isolation structure 200 to form a whole-surface electrode.

[0085] Optionally, the display panel further includes a pixel definition layer 300 , the pixel definition layer 300 includes a pixel defining portion 310 and a pixel opening 320 , the orthographic projection of the pixel opening 320 on the substrate 100 is located within the orthographic projection range of the isolation opening 210 on the substrate 100 , and the light emitting unit 330 is located at the pixel opening 320 .

[0086] In these optional embodiments, the display panel also includes a pixel definition layer 300, the pixel opening 320 of the pixel definition layer 300 is connected to the isolation opening 210, and the light-emitting unit 330 is located in the pixel opening 320, so that there is enough space in the isolation opening 210 to set the filter unit 410.

[0087] Optionally, the isolation structure 200 is located on a side of the pixel defining portion 310 facing away from the substrate 100 , or a clearance opening is provided on the pixel defining portion 310 , and the isolation structure 200 is located in the clearance opening.

[0088] See also Figure 6 In some optional embodiments, the filter unit 410 includes a third portion 421 located on the side of the light-emitting unit 330 away from the substrate 100 and a fourth portion 422 connected to the peripheral side of the third portion 421 and extending to the side of the isolation structure 200 away from the substrate 100, and the filter unit 410 is arranged between adjacent fourth portions 422.

[0089] In this embodiment, the filtering unit 410 includes a third part 421 and a fourth part 422, so that the light emitted by the light-emitting unit 330 close to the isolation structure 200 or the reflected light and refracted light on the isolation structure 200 can also be emitted through the third part 421 and the fourth part 422, thereby ensuring the filtering effect, further improving the light output efficiency of the display panel, and improving the performance of the display panel.

[0090] See also Figure 7 The embodiment of the present invention further provides a method for preparing a display panel, comprising:

[0091] S110: preparing an isolation structure 200 on the substrate 100, wherein the isolation structure 200 encloses a plurality of isolation openings 210, such as Figure 8 As shown;

[0092] S120: preparing a light-emitting unit 330 of a light-emitting functional layer in the isolation opening 210, such as Fig. 9 As shown;

[0093] S130: preparing a first sub-portion 521 of the first encapsulation layer 500 on the side of the isolation structure 200 facing away from the substrate 100, such as Fig.10 As shown;

[0094] S140: Prepare the filter unit 410 of the filter layer 400 and the touch unit of the touch layer 600 respectively, prepare the filter unit 410 on the side of the light emitting unit 330 in the isolation opening 210 away from the substrate 100, and prepare the touch unit on the side of the first sub-portion 521 away from the substrate 100, such as Figure 2 or Figure 3 shown.

[0095] In the method for preparing a display panel provided in an embodiment of the present invention, the isolation structure 200 is used to enclose and form an isolation opening 210, so that the light-emitting unit 330 of the light-emitting layer is located in the isolation opening 210, thereby improving the problem of light interference between light-emitting units 330 of different colors. A filter unit 410 is provided on the light-emitting unit 330. By providing the filter unit 410 to filter stray light, the light extraction efficiency of the display panel can be improved. Since the filter unit 410 is also located in the isolation opening 210 and is located on the light-emitting unit 330, when the light-emitting unit 330 is prepared in sequence by etching or other processes, before preparing the rear light-emitting unit 330, the filter unit 410 can be covered on the front light-emitting unit 330. When the rear light-emitting unit 330 is prepared by etching, due to the protection of the filter unit 410, the influence on the front light-emitting unit 330 can be reduced, the yield of the front light-emitting unit 330 can be improved, and the process performance of the display panel can be improved. In addition, by arranging the touch unit of the touch layer 600 on the side of the first sub-portion 521 away from the substrate 100, and the touch unit is located between adjacent filter units 410, the touch function of the display panel is realized while avoiding affecting the light output, thereby effectively reducing the thickness of the display panel film layer and improving the performance of the display panel.

[0096] Optionally, in step S110, there are multiple ways to arrange the substrate 100, and the substrate 100 may include a substrate and a first conductive layer, a second conductive layer, and a third conductive layer arranged on one side of the substrate and stacked. An insulating layer is arranged between adjacent conductive layers.

[0097] The substrate may be a hard substrate, such as a glass substrate, or a flexible substrate, and its material may be polyimide, polystyrene, polyethylene terephthalate, polyparaxylene, polyethersulfone or polyethylene naphthalate. The substrate is mainly used to support the device disposed thereon.

[0098] Optionally, step S120 may include: disposing a first light emitting material layer on one side of the isolation structure 200 and the substrate 100 , and partially dropping the first light emitting material layer into the first isolation opening 211 to form a first light emitting unit 331 .

[0099] Optionally, step S130 may include: after preparing the light-emitting unit 330 in the isolation opening 210, preparing a first packaging material layer on the side of the light-emitting unit 330 facing away from the substrate 100, the first packaging material layer covering the isolation structure 200 and the light-emitting unit 330, that is, the first packaging material layer may be patterned to form a first portion 510 located between the filter layer 400 and the light-emitting functional layer and a second portion 520 connected to the peripheral side of the first portion 510 and extending to the side of the isolation structure 200 facing away from the substrate 100.

[0100] In step 140 , a filter layer 400 may be prepared on the side of the first packaging material layer facing away from the substrate 100 , and the filter layer 400 may be patterned to form a filter unit 410 in the isolation opening 210 .

[0101] Similarly, a patterned touch unit may be formed on the side of the first sub-portion 521 facing away from the substrate 100 .

[0102] Optionally, in step S140, the preparation order of the filter unit 410 of the filter layer 400 and the touch unit of the touch layer 600 can be adjusted according to actual conditions. For example, the filter unit 410 of the filter layer 400 can be first prepared on the side of the light-emitting unit 330 in the isolation opening 210 facing away from the substrate 100; and then the touch unit of the touch layer 600 is prepared on the side of the first sub-portion 521 facing away from the substrate 100. The touch unit is located between adjacent filter units 410 to ensure that the touch effect of the touch unit is not affected by the filter unit 410.

[0103] Alternatively, a touch unit of the touch layer 600 is first prepared on the side of the first sub-portion 521 facing away from the substrate 100; and then a filter unit 410 of the filter layer 400 is prepared on the side of the light-emitting unit 330 in the isolation opening 210 facing away from the substrate 100 to prevent the touch unit from affecting the light output effect of the filter unit 410.

[0104] Optionally, the display panel may further include a second electrode layer, and an electrode material layer may be provided on the first light-emitting material layer, with the first encapsulation material layer falling on the electrode material layer, that is, the second electrode layer may be formed between the light-emitting functional layer and the first encapsulation layer 500 .

[0105] As described above, the isolation opening 210 includes the first isolation opening 211, the second isolation opening 212 and the third isolation opening 213, the filter unit 410 includes the first filter unit 411, the second filter unit 412 and the third filter unit 413, and the light emitting unit 330 includes the first light emitting unit 331, the second light emitting unit 332 and the third light emitting unit 333.

[0106] After the first light emitting unit 331 is prepared, the second light emitting unit 332 and the third light emitting unit 333 may be prepared in sequence.

[0107] In some optional embodiments, the steps of separately preparing the filter unit 410 of the filter layer 400 and the touch unit of the touch layer 600 further include: roughening the surface of the touch layer 600 facing away from the substrate 100;

[0108] Alternatively, a groove 610 is formed on a surface of the touch layer 600 facing away from the substrate 100 ;

[0109] Alternatively, the anti-reflection layer 800 is formed on a surface of the touch layer 600 that is away from the substrate 100 .

[0110] The surface of the touch unit facing away from the substrate 100 can be roughened by plasma treatment or other process means to reduce the reflected or refracted light of the external light on the surface of the touch unit facing away from the substrate 100, avoid the touch unit display being visible, and improve the integrated black effect of the display panel.

[0111] Alternatively, a larger slot 610 is formed by etching or other means, so that the external light is refracted and reflected in the slot 610, thereby reducing the refracted light of the external light emitted from the touch unit.

[0112] An anti-reflection layer 800 may be formed on the surface of the touch layer 600 facing away from the substrate 100 to reduce or eliminate reflected light on the surface of the touch unit facing away from the substrate 100. The anti-reflection layer 800 may be made of materials such as silicon nitride.

[0113] In this embodiment, along the direction perpendicular to the plane where the substrate 100 is located, the cross section of the slot 610 is at least one of a polygon, a sector, and a semicircle, as long as the incident light from the outside can be continuously refracted, reflected, and absorbed in the slot 610. The specific shape is not limited to the above examples. Optionally, the cross section of the slot 610 is an inverted triangle, so that more incident light from the outside can enter the slot 610.

[0114] An embodiment of the present application further provides a display device, which includes a display panel according to any of the above embodiments or a display panel prepared by the preparation method of any of the above embodiments.

[0115] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A display panel, characterized in that: include: substrate; An isolation structure is disposed on one side of the substrate and encloses a plurality of isolation openings; A light-emitting functional layer, comprising light-emitting units located in each of the isolation openings; A first encapsulation layer, comprising a first sub-portion located on a side of the isolation structure away from the substrate; A filter layer, comprising a filter unit at least partially located at the isolation opening and located on the side of the light-emitting unit away from the substrate; a touch layer, wherein the touch layer comprises a plurality of touch units, each of which is located at a side of the first sub-portion away from the substrate, and the touch unit is located between adjacent filter units.

2. The display panel according to claim 1, characterized in that: A surface of the touch control unit on one side facing away from the substrate comprises a first region and a second region adjacent to each other, and the roughness of the first region is greater than the roughness of the second region.

3. The display panel according to claim 1, characterized in that: A groove is provided on a surface of the touch unit on one side facing away from the substrate; Preferably, along a direction perpendicular to the plane where the substrate is located, the cross-section of the groove is at least one of a polygon, a sector, and a semicircle.

4. The display panel according to claim 1, characterized in that: It also includes an anti-reflection layer disposed on a side of the touch unit away from the substrate, and the reflectivity of the material of the anti-reflection layer is lower than the reflectivity of the material of the touch unit.

5. The display panel according to claim 1, characterized in that: The first encapsulation layer comprises a first portion located between the filter layer and the light-emitting functional layer and a second portion connected to a peripheral side of the first portion and extending to a side of the isolation structure away from the substrate; The second portion includes the first sub-portion; Preferably, the material of the first encapsulation layer includes an inorganic material; Preferably, there are multiple first parts, and each first part is used to encapsulate a corresponding light-emitting unit; Preferably, a plurality of the first parts are arranged at intervals, and the orthographic projection of the first part on the substrate is located within the orthographic projection range of the filter unit on the substrate; Preferably, the orthographic projection of the second portion on the substrate covers the orthographic projection of a surface of the isolation structure on a side facing away from the substrate on the substrate; Preferably, the orthographic projection of the second part on the substrate covers the orthographic projection of the touch layer on the substrate.

6. The display panel according to claim 1, characterized in that: The light transmittance of the touch unit is less than or equal to 50%; Preferably, the material of the touch control unit includes metal or metal oxide.

7. The display panel according to claim 1, characterized in that: The filter unit located at a side of the isolation structure facing away from the substrate has a first top surface facing away from the substrate, and the touch layer has a second top surface facing away from the substrate; Along a direction perpendicular to a plane where the substrate is located, the first top surface is located on a side of the second top surface facing the substrate, or the first top surface is flush with the second top surface.

8. The display panel according to claim 1, characterized in that: The isolation structure comprises a first sublayer and a second sublayer stacked in a direction away from the substrate, wherein an orthographic projection of the first sublayer on the substrate is located within an orthographic projection of the second sublayer on the substrate; Preferably, the material of the isolation structure includes a conductive material, a first electrode is provided between the light emitting unit and the filter unit, and the first electrode is electrically connected to the isolation structure; Preferably, it further comprises a pixel definition layer, the pixel definition layer comprises a pixel defining portion and a pixel opening, the orthographic projection of the pixel opening on the substrate and the orthographic projection of the isolation opening on the substrate at least partially overlap, and the light emitting unit is located at the pixel opening; Preferably, the isolation structure is located on a side of the pixel defining portion facing away from the substrate, or a clearance opening is provided on the pixel defining portion, and the isolation structure is located in the clearance opening.

9. The display panel according to claim 1, characterized in that: It also includes a second packaging layer, which is located on a side of the filter layer away from the substrate; Preferably, the material of the second encapsulation layer includes organic material; Preferably, it further comprises a third encapsulation layer, which is located on a side of the second encapsulation layer away from the substrate; Preferably, the material of the third encapsulation layer includes inorganic material; Preferably, the first encapsulation layer and the third encapsulation layer are made of the same material.

10. The display panel according to claim 1, characterized in that: The filter unit comprises a third portion located at a side of the light emitting unit away from the substrate and a fourth portion connected to a peripheral side of the third portion and extending to a side of the isolation structure away from the substrate; The touch unit is located between adjacent fourth parts.

11. A method for preparing a display panel, characterized in that: include: Preparing an isolation structure on a substrate, wherein the isolation structure encloses a plurality of isolation openings; Prepare a light-emitting unit of a light-emitting functional layer in the isolation opening; Prepare a first sub-portion of a first encapsulation layer on a side of the isolation structure facing away from the substrate; A filter unit of the filter layer and a touch unit of the touch layer are prepared respectively. The filter unit is prepared on the side of the light emitting unit in the isolation opening away from the substrate, and the touch unit is prepared on the side of the first sub-portion away from the substrate.

12. The method for preparing a display panel according to claim 11, characterized in that: The steps of separately preparing the filter unit of the filter layer and the touch unit of the touch layer include: A filter unit of the filter layer is prepared on a side of the light emitting unit in the isolation opening facing away from the substrate; A touch control unit of the touch control layer is prepared on a side of the first sub-portion away from the substrate, wherein the touch control unit is located between adjacent filter units; Or, in the step of separately preparing the filter unit of the filter layer and the touch unit of the touch layer, the steps include: A touch unit of a touch layer is prepared on a side of the first sub-portion away from the substrate; A filter unit of a filter layer is prepared on a side of the light emitting unit in the isolation opening facing away from the substrate.

13. The method for preparing a display panel according to claim 11, characterized in that: The step of separately preparing the filter unit of the filter layer and the touch unit of the touch layer further includes: Roughening the surface of the touch layer on a side facing away from the substrate; or, Forming a groove on a surface of the touch layer facing away from the substrate; Alternatively, an anti-reflection layer is formed on a surface of the touch layer that is away from the substrate.

14. A display device, characterized in that: A display panel comprising the display panel according to any one of claims 1 to 10 or a display panel prepared by the display panel preparation method according to any one of claims 11 to 13.

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