Display panel and display device

Abstract

The invention provides a display panel and a display device. The display panel comprises a display area, and the display area comprises at least one first area. In addition, the display panel further comprises a substrate, and a display function layer, an isolation structure and a touch control structure which are located on the substrate. The display function layer is located on the substrate and includes a plurality of light emitting devices. The isolation structure is on the substrate and in the display area, the isolation structure including a plurality of first openings and a plurality of second openings in the first area, the first openings defining a light emitting device. The touch control structure is located on the side, away from the substrate, of the isolation structure and comprises a touch control electrode, the touch control electrode comprises a dummy electrode, and the orthographic projection of at least one second opening on the substrate is located in the orthographic projection of the dummy electrode on the substrate. The second openings for light transmission are arranged below the dummy electrodes, so that the risk of interference between touch driving signals and display driving signals can be reduced, and the touch and display functions of the display panel can be ensured.

Description

Technical Field

[0001] The present disclosure 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) is an organic thin film electroluminescent device. It has attracted great attention and is widely used in electronic display products due to its advantages such as simple preparation process, low cost, low power consumption, high brightness, wide viewing angle, high contrast and flexible display.

[0003] However, current electronic display products are limited by their own structural design, and it is difficult to have both good touch and display functions when applied to scenarios such as under-screen recognition and transparent display. Summary of the invention

[0004] In a first aspect, the present disclosure provides a display panel, which includes a display area, and the display area includes at least one first area. In addition, the display panel also includes a substrate and a display function layer, an isolation structure and a touch structure located on the substrate. The display function layer is located on the substrate and includes a plurality of light-emitting devices. The isolation structure is located on the substrate and in the display area, the isolation structure includes a plurality of first openings and a plurality of second openings located in the first area, and the first openings define the light-emitting devices. The touch structure is located on a side of the isolation structure away from the substrate, and includes a touch electrode, the touch electrode includes a dummy electrode, and the orthographic projection of at least one second opening on the substrate is located within the orthographic projection of the dummy electrode on the substrate.

[0005] In the above scheme, the second opening for light transmission is arranged below the dummy electrode, which can reduce the risk of interference between the touch and display drive signals due to the overlap of the touch structure and the drive circuit in the substrate through the second opening, so as to ensure the touch and display functions of the display panel.

[0006] For example, the orthographic projection of the dummy electrode on the substrate is located within the orthographic projection of the first region on the substrate.

[0007] For example, the orthographic projection of the first region on the substrate is located within the orthographic projection of the dummy electrode on the substrate.

[0008] In a specific embodiment of the first aspect of the present disclosure, the light-emitting device includes a first electrode, a light-emitting functional layer, and a second electrode stacked in sequence on a substrate, and the light-emitting functional layer is located in a first opening. The isolation structure includes a support portion and a crown portion, the support portion is located between the crown portion and the substrate, the support portion and the crown portion surround the first opening and the second opening, and the orthographic projection of the support portion on the substrate is located between the orthographic projection of the crown portion on the substrate.

[0009] Optionally, the support portion is a conductive structure, and the second electrode is located in the first opening and connected to the support portion.

[0010] Optionally, the display panel also includes a pixel defining layer, wherein the pixel defining layer is located between the support portion and the substrate and is surrounded by a plurality of third openings corresponding to the first openings respectively, the orthographic projections of the third openings on the substrate are located within the orthographic projections of the corresponding first openings on the substrate to expose the first electrode, and the edge portion of the first electrode is located between the pixel defining layer and the substrate.

[0011] In a specific embodiment of the first aspect of the present disclosure, the touch electrode also includes a plurality of first touch electrodes and a plurality of second touch electrodes in parallel, the first touch electrodes and the second touch electrodes cross each other and are spaced apart from the dummy electrodes, the first touch electrode includes a plurality of first connecting portions and a plurality of first touch electrode blocks spaced apart from each other by the second touch electrodes, the first touch electrode blocks of the same first touch electrode are connected to each other through the first connecting portions, the second touch electrode includes a plurality of second connecting portions and a plurality of second touch electrode blocks spaced apart from each other by the first touch electrodes, the second touch electrode blocks of the same second touch electrode are connected to each other through the second connecting portions, the first touch electrode, the second touch electrode blocks and the dummy electrodes are on the same layer and made of the same material, and the second connecting portions cross each other and are spaced apart from each other.

[0012] In a specific implementation of the first aspect of the present disclosure, at least one dummy electrode is located within the first touch electrode block and / or the second touch electrode block.

[0013] In the above solution, the provision of the dummy electrodes can reduce the design area of ​​the first touch electrode block and the second touch electrode block, thereby increasing the sensitivity of the touch function of the touch structure and reducing the load when driving the touch electrodes.

[0014] Optionally, dummy electrodes are arranged on the inner sides of all the first touch electrode blocks and the second touch electrode blocks, or dummy electrodes corresponding to the first area are arranged on the inner sides of at least one first touch electrode block and / or the second touch electrode block, and no dummy electrodes are arranged in the first touch electrode blocks and / or the second touch electrode blocks that do not correspond to the first area.

[0015] In a specific implementation of the first aspect of the present disclosure, at least one dummy electrode is located between the first touch electrode block and the second touch electrode block.

[0016] In the above scheme, the dummy electrode can separate the first touch electrode block and the second touch electrode block to reduce the risk of the first touch electrode block and the second touch electrode block being connected together; in addition, at least a portion of the dummy electrode can be used to prepare a signal line connected to the first touch electrode or the second touch electrode, so that the signal line of the touch structure is arranged in the display area, thereby reducing the border of the display panel.

[0017] In a specific implementation of the first aspect of the present disclosure, the shape of the edge of the first touch electrode block and / or the second touch electrode block adjacent to the dummy electrode is the same as the shape of the edge of the dummy electrode.

[0018] Optionally, the edge of the dummy electrode is in a curved shape. In this design, the curved edge can alleviate optical diffraction, interference and other phenomena at the edge of the dummy electrode to reduce optically visible phenomena at the edge of the dummy electrode (the shape regularity causes the optical phenomenon to be visually visible).

[0019] In a specific embodiment of the first aspect of the present disclosure, the material of the touch electrode includes a transparent conductive material. This design can simplify the preparation process of the touch electrode, and the touch electrode will not block the light output of the light emitting device to ensure the viewing angle of the display panel.

[0020] In another specific embodiment of the first aspect of the present disclosure, the touch electrode is a grid electrode, and the meshes of the grid electrode correspond to the first opening and the second opening respectively, and the orthographic projection of the mesh on the substrate coincides with the orthographic projection of the corresponding first opening and the second opening on the substrate, or is located within the orthographic projection of the corresponding first opening and the second opening on the substrate. Optionally, the material of the touch electrode includes metal.

[0021] In the above scheme, the grid-shaped electrode will not block the light output of the light-emitting device, and the design can remove the restrictions on the preparation materials of the touch electrode, so that the touch electrode can use materials with high conductivity such as metal to reduce the load when driving the touch electrode.

[0022] In a specific embodiment of the first aspect of the present disclosure, the display panel may further include a first encapsulation layer, which is located on the side of the display function layer away from the substrate and includes a plurality of encapsulation units corresponding to the first openings respectively, and at least part of the encapsulation units fill the corresponding first openings.

[0023] In a specific embodiment of the first aspect of the present disclosure, the display panel also includes a second encapsulation layer and a third encapsulation layer covering the first encapsulation layer, the second encapsulation is located between the first encapsulation layer and the third encapsulation layer, the touch structure is located on the side of the third encapsulation layer away from the substrate, the first encapsulation layer and the third encapsulation layer are inorganic film layers, the second encapsulation layer is an organic film layer, and the surface of the second encapsulation layer away from the substrate is a plane.

[0024] In a specific implementation of the first aspect of the present disclosure, the first regions are multiple and spaced apart from each other and evenly arranged in the display area. In this design, the display panel can be applied to the transparent display field.

[0025] In another specific implementation of the first aspect of the present disclosure, the display area also includes a second area, the light transmittance of the second area is less than the light transmittance of the first area, and the isolation structure and the touch structure are also located in the second area. In this design, the display panel can be applied to scenes such as under-screen camera, fingerprint recognition, infrared ranging, etc., and the first area can be correspondingly designed as a camera area, a fingerprint recognition area, an infrared detection area, etc.

[0026] Optionally, the dummy electrodes located in the second region are different in size from the dummy electrodes located in the first region.

[0027] Optionally, an orthographic projection area of ​​the dummy electrode located in the second region on the substrate is smaller than an orthographic projection area of ​​the dummy electrode located in the first region on the substrate.

[0028] Optionally, the dummy electrodes located in the second region have different shapes from the dummy electrodes located in the first region.

[0029] Optionally, all the second openings are located in the first region.

[0030] A second aspect of the present disclosure provides a display device, which may include the display panel in the first aspect.

[0031] In another specific embodiment of the second aspect of the present disclosure, the display area also includes a second area, and the transmittance of the second area is less than the transmittance of the first area, and the display device also includes at least one identification device corresponding to the first area, wherein the orthographic projection of the first area on the substrate coincides with the orthographic projection of the identification device on the substrate, or the orthographic projection of the identification device on the substrate is located within the orthographic projection of the first area on the substrate.

[0032] Optionally, the dummy electrode in the first region has the same shape as the identification device corresponding to the first region.

[0033] Optionally, the display device further includes a foam layer, which is located on a side of the substrate in the display panel away from the display function layer, the foam layer includes a light-transmitting opening, and the orthographic projection of the identification device on the substrate is located within the orthographic projection of the light-transmitting opening on the substrate.

[0034] In another specific embodiment of the second aspect of the present disclosure, the display device also includes a foam layer, which is located on the side of the substrate in the display panel away from the display function layer, and the foam layer includes a light-transmitting opening, and the orthographic projection of the identification device on the substrate is located within the orthographic projection of the light-transmitting opening on the substrate. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A schematic diagram of a planar structure of a display panel provided in one embodiment of the present disclosure.

[0036] Figure 2 for Figure 1 An enlarged view of the S1 region of the display panel under one design is shown, which illustrates a planar design of the isolation structure in the display panel.

[0037] Figure 3 for Figure 2 The shown display panel is a cross-sectional view along M1 - N1 in one design.

[0038] Figure 4 A schematic diagram of a planar structure of a touch electrode layer in a display panel provided by an embodiment of the present disclosure.

[0039] Figure 5 for Figure 4 The touch electrode is shown in a cross-sectional view along M2 - N2 .

[0040] Figure 6 for Figure 4 The schematic diagram of the planar structure of the touch electrode without considering the dummy electrode is shown.

[0041] Figure 7 for Figure 6 The touch electrode layer is shown in a cross-sectional view along M3 - N3 .

[0042] Figure 8 A schematic plan view of the structural relationship between a touch electrode block and a first region in a display panel provided by an embodiment of the present disclosure.

[0043] Fig. 9 A schematic plan view of the structural relationship between a touch electrode block and a first region in a display panel provided by an embodiment of the present disclosure.

[0044] Fig.10 A schematic plan view of the positional relationship between a touch electrode block and a first region in another display panel provided by an embodiment of the present disclosure.

[0045] Fig.11 A schematic plan view of the positional relationship between a touch electrode block and a first region in another display panel provided by an embodiment of the present disclosure.

[0046] Fig.12 for Fig.11 FIG. 1 is a schematic diagram of an enlarged structure of the first area 13 b and the surrounding touch electrodes under one design.

[0047] Fig.13 for Fig.11 FIG. 1 is a schematic diagram of an enlarged structure of the first area 13 b and the surrounding touch electrodes under another design.

[0048] Fig.14 for Figure 2 The cross-sectional view of the display panel along M1 - N1 under another design is shown, wherein the touch electrodes are configured as grid-shaped electrodes.

[0049] Fig.15 for Figure 1 The shown figure is an enlarged view of the S1 region of the display panel under another design.

[0050] Fig.16 A cross-sectional view of a partial area of ​​a display panel provided by an embodiment of the present disclosure.

[0051] Figures 17 to 22 A process diagram of a method for preparing a display panel provided in one embodiment of the present disclosure.

[0052] Fig.23 A cross-sectional view of a display device provided in accordance with an embodiment of the present disclosure.

[0053] Fig.24 A schematic structural diagram of the positional relationship between a first area and an identification device in a display panel provided in one embodiment of the present disclosure. DETAILED DESCRIPTION

[0054] The following will be combined with the drawings in the embodiments of this specification to clearly and completely describe the technical solutions in the embodiments of this specification. Obviously, the described embodiments are only part of the embodiments of this specification, not all of the embodiments. Based on the embodiments in this specification, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this specification.

[0055] The display panel can have a touch function while taking into account functions such as transparent display and under-screen recognition (fingerprint recognition, under-screen camera). To this end, a light-transmitting area will be divided in the display panel, and light-transmitting holes will be set in the gaps between the sub-pixels in the light-transmitting area to achieve light transmission. However, in the area where the light-transmitting holes are located, signal interference may occur between the conductive structure used to achieve the touch function (such as the touch electrode described below) and the underlying driving circuit (such as the driving circuit in the substrate described below), thereby resulting in poor touch or display function.

[0056] At least one embodiment of the present disclosure provides a display panel to at least solve the above technical problems. The display panel includes a display area, and the display area includes at least one first area. In addition, the display panel also includes a substrate and a display function layer, an isolation structure and a touch structure located on the substrate. The display function layer is located on the substrate and includes a plurality of light-emitting devices. The isolation structure is located on the substrate and in the display area, and the isolation structure includes a plurality of first openings and a plurality of second openings located in the first area, and the first opening defines the light-emitting device. The touch structure is located on the side of the isolation structure away from the substrate, and includes a touch electrode, and the touch electrode includes a dummy electrode, and the positive projection of at least one second opening on the substrate is located within the positive projection of the dummy electrode on the substrate. In this way, the second opening for light transmission is arranged below the dummy electrode, which can reduce the risk of interference between the touch and display drive signals due to the overlap of the touch structure and the drive circuit in the substrate through the second opening, so as to ensure the touch and display functions of the display panel.

[0057] The structure of the display panel and the display device in at least one embodiment of the present disclosure is described in detail below in conjunction with the accompanying drawings. In addition, in these drawings, a spatial rectangular coordinate system is established with the substrate in the display panel as a reference to intuitively present the positional relationship of each component in the display panel. In the spatial rectangular coordinate system, the X-axis and the Y-axis are parallel to the surface where the substrate is located, and the Z-axis is perpendicular to the surface where the substrate is located.

[0058] like Figures 1 to 3 As shown, the display area 11 of the display panel 10 and the border area 12 surrounding the display area 11, the display area 11 includes a first area 13, and sub-pixels (the entity is a light-emitting device 220) such as R, G, and B are arranged in the display area 11. The first area 13 is set to have a certain light transmittance for under-screen recognition, video or transparent display. It should be noted that in some embodiments of the present disclosure, part of the wiring in the border area 12 can be arranged in the display area 11, so that the border area 12 can be designed as a single-sided border.

[0059] It should be noted that the first area 13 can be set to at least one, for example, can be set to Figure 1 The three areas 13a, 13b and 13c are shown. The three areas can be used for different functions respectively. For example, area 13a can be used for under-screen fingerprint recognition, and area 13c can be used for infrared ranging.

[0060] The physical structure of the display panel 10 may include a substrate 100 and a display function layer 200 , an isolation structure 210 , and a touch control structure (the touch control electrode 400 included therein is shown in the figure) located on the substrate 100 .

[0061] The display function layer 200 is located on the substrate 100 and includes a plurality of light-emitting devices 220 located in the display area 11. The isolation structure 210 is located on the substrate 100 and in the display area 11. The isolation structure 210 includes a plurality of first openings 201 and a plurality of second openings 202 located in the first region 13. The first openings 201 define the light-emitting devices 220. The touch control structure is located on a side of the isolation structure 210 that is away from the substrate 100 and includes a touch control electrode 400. The touch control electrode 400 includes a dummy electrode 401. The orthographic projection of at least one second opening 202 on the substrate 100 is located within the orthographic projection of the dummy electrode 401 on the substrate 100.

[0062] It should be noted that the dummy electrode is used to optimize the pattern of the touch electrode to adjust its load and the electric field distribution during driving. Therefore, when the dummy electrode is set in the touch electrode, the dummy electrode exists independently and is not connected to other electrodes in the touch electrode, that is, when the touch electrode is applied with a driving signal (voltage), the driving signal will not be applied to the dummy electrode. In this way, even if the area where the dummy electrode is located overlaps with the second opening for light transmission, the dummy electrode will not interfere with the driving circuit in the substrate through the second opening.

[0063] For example, Figures 1 to 3 As shown, the light-emitting device 220 includes a first electrode 221, a light-emitting functional layer 223, and a second electrode 222 sequentially stacked on the substrate 100, and the light-emitting functional layer 223 is located in the first opening 201. The light-emitting functional layer 223 may include a first common layer 2231, a light-emitting layer 2232, and a second common layer 2233, and the first common layer 2231, the light-emitting layer 2232, and the second common layer 2233 are sequentially stacked on the anode 221. The first common layer 2231 may include a hole injection layer, a hole transport layer, an electron blocking layer, etc. The second common layer 2232 may include an electron injection layer, an electron transport layer, a hole blocking layer, etc. The setting of the isolation structure 210 needs to make the first common layer 221 (the main film layer causing current crosstalk) of each light-emitting device 220 electrically disconnected from each other.

[0064] For example, Figures 1 to 3 As shown, the isolation structure 210 may include a support portion 211 and a crown portion 212, wherein the support portion 211 is located between the substrate 100 and the crown portion 212, and the orthographic projection of the support portion 211 on the substrate 100 is located within the orthographic projection of the crown portion 212 on the substrate 100. In this way, the isolation structure 210 is configured to be wide at the top and narrow at the bottom, so that the isolation structure 210 can block the light-emitting functional layer 223 (the first common layer 2231 included therein, which is the main film layer causing current crosstalk) of the adjacent light-emitting device, so as to reduce the current crosstalk problem of the adjacent light-emitting device 220.

[0065] It should be noted that in some designs of the present disclosure, the support portion 211 and the crown portion 212 may be as follows: Figure 3 The design shown is a multi-layer stacked structure, which is convenient for being composed of different materials respectively. For example, in the following embodiment, the support portion 211 is designed to be conductive, but the crown portion 212 is not limited to being designed to be conductive; or, in other designs of the present disclosure, the support portion 211 and the crown portion 212 can be set as an integrated structure to increase the firmness of the isolation structure 210.

[0066] In at least one embodiment of the present disclosure, Figure 3 As shown, the support portion 211 may be a conductive structure, and the second electrode 222 is located in the first opening 201 and connected to the support portion 211. Thus, the support portion 211 of the isolation structure 210 connects the second electrode 222 in series, so that the support portion 211 and the second electrode 222 constitute a common electrode for driving.

[0067] It should be noted that the material of the second electrode 222 can be a metal material. The smaller the thickness of the second electrode 222, the higher its transmittance, but the higher its resistivity. If the thickness of the second electrode 222 is too small, without setting an isolation structure, the voltage drop of the second electrode 222 (the common electrode at this time) will be too large. In the embodiment of the present disclosure, the second electrode 222 is connected to the conductive support portion 211, which can remove the thickness restriction of the second electrode 222, so that the second electrode 222 has a smaller thickness to have a higher transmittance.

[0068] In at least one embodiment of the present disclosure, the support portion 211 may be a metal conductive structure. The metal material has a high conductivity and can reduce the voltage drop when driving the second electrode. Accordingly, the metal material can only be light-transmissive when the thickness is extremely thin (e.g., tens of nanometers), and the isolation structure 220 requires a certain thickness to isolate the light-emitting functional layer 223 (the first common layer 2231 included therein), so the support portion 211 in the isolation structure 220 is almost opaque. Therefore, the isolation structure 220 can only be made light-transmissive by providing the second opening 202.

[0069] In some embodiments of the present disclosure, Figure 3As shown, the display panel may further include a pixel defining layer 213, which is located between the isolation structure 210 and the substrate 100 and between the isolation structure 210 and the first electrode 221. The pixel defining layer 213 is defined with a plurality of third openings 203 corresponding to the first openings 201 respectively to expose the first electrode 221, and the orthographic projections of the third openings 203 on the substrate 100 are located within the orthographic projections of the corresponding first openings 201 on the substrate 100, so that the first electrode 221 can have a larger design area without contacting the support portion 211, so that the light-emitting device 220 has a larger effective light-emitting area.

[0070] In the embodiments of the present disclosure, there is no limitation on the specific structure of the touch electrode layer, which can be designed according to the actual process requirements. The different designs of the touch electrode layer are described below through different embodiments, as follows.

[0071] In at least one embodiment of the present disclosure, Figures 3 to 7As shown, the touch electrode 400 further includes a plurality of parallel first touch electrodes 410 and a plurality of parallel second touch electrodes 420. The first touch electrodes 410 and the second touch electrodes 420 intersect with each other and form a touch unit P at the intersection. Each touch unit P corresponds to a touch position coordinate, and the first touch electrodes 410 and the second touch electrodes 420 are spaced apart from the dummy electrode 401. The first touch electrode 410 includes a plurality of first connecting portions 412 and a plurality of first touch electrode blocks 411 spaced apart from each other by the second touch electrodes 420. The first touch electrode blocks 411 of the same first touch electrode 410 are connected to each other through the first connecting portion 412. The second touch electrode 420 includes a plurality of The second connecting portion 422 and the plurality of second touch electrode blocks 421 separated from each other by the first touch electrode 410, the second touch electrode blocks 421 of the same second touch electrode 420 are connected to each other through the second connecting portion 422, the first touch electrode 410, the second touch electrode block 421 and the dummy electrode 401 are in the same layer and made of the same material, that is, the first touch electrode 410, the second touch electrode block 421 and the dummy electrode 401 can be formed by processing a continuous material film layer, the second connecting portion 422 and the first connecting portion 412 intersect and are separated from each other, and the intersection of the first connecting portion 412 and the second connecting portion 422 is the intersection of the first touch electrode 410 and the second touch electrode 420. The second connecting portion 422 can be located before the layer where the first touch electrode 410 is located and the isolation structure, or the second connecting portion 422 can be located on the side of the layer where the first touch electrode 410 is located away from the isolation structure. For example, in an implementable process flow, a first conductive material layer may be deposited first, and patterned to form a plurality of first electrodes 410 and a second electrode block 421 in a plurality of second electrodes 420, wherein the first conductive material layer is formed into a plurality of meshes so that the first electrode 410 and the second electrode block 421 in the plurality of second electrodes 420 are both formed into mesh-shaped electrodes; an insulating layer 430 is deposited to cover the first electrode 410 and the second electrode block 421 in the plurality of second electrodes 420; the insulating layer 430 is patterned to form a through hole exposing the second electrode block 421; a second conductive material layer is deposited on the insulating layer 430, and patterned to form a second connecting portion 422 in the second electrode 420, and the second connecting portion 422 is connected to the second electrode block 421 through the through hole. In this design, the main parts of the first electrode 410 and the second electrode 420 are designed in the same layer, so there is no need to consider the problem of mesh alignment between the two, which is conducive to improving the light transmittance of the touch electrode layer 400.

[0072] In the embodiments of the present disclosure, there is no restriction on the size relationship between the dummy electrode and the first region. As long as the dummy electrode exists in the first region, the problem of signal interference between touch control and display can be alleviated through the dummy electrode.

[0073] If the area of ​​the dummy electrode 401 is too large, the area of ​​the touch electrode that realizes the touch function will become smaller, resulting in a decrease in the touch performance. Figure 8 As shown, the area of ​​the first region 13 a is larger than the area of ​​the dummy electrode 401 , and the orthographic projection of the dummy electrode 401 on the substrate is located within the orthographic projection of the first region 13 a on the substrate.

[0074] For example, Fig. 9 As shown, the area of ​​the dummy electrode 401 is larger than the area of ​​the first region 13a, and the orthographic projection of the first region 13a on the substrate is within the orthographic projection of the dummy electrode 401 on the substrate, so that the signal interference problem between touch and display can be further alleviated. It should be noted that in the embodiments of the present disclosure, there is no restriction on the location and specific shape of the dummy electrode in the touch electrode, and the design can be made according to the specific design requirements of the touch electrode and the distribution of the first region. Below, several specific embodiments are used to illustrate several ways of setting the dummy electrode.

[0075] In some embodiments of the present disclosure, Figures 4 to 9 As shown, at least one dummy electrode 401 is located within the first touch electrode block 411 and / or the second touch electrode block 421. In this way, the provision of the dummy electrode 401 can reduce the design area of ​​the first touch electrode block 411 and the second touch electrode block 421, thereby increasing the sensitivity of the touch function of the touch structure and reducing the load when driving the touch electrode 400. It can be understood that by providing the dummy electrode 401, the design of the first touch electrode block 411 and the second touch electrode block 421 can be reduced, thereby reducing the capacitance formed at the touch unit, so that when a touch operation (such as a finger approaching) is performed, the capacitance change (ratio) caused by the touch operation will also be greater, so that the touch is easier to be recognized, that is, the sensitivity of the touch is increased.

[0076] For example, in some designs, such as Figures 4 to 9 As shown, dummy electrodes 401 are disposed inside all the first touch electrode blocks 411 and the second touch electrode blocks 421 .

[0077] For example, in some other designs, a dummy electrode corresponding to the first area is arranged on the inner side of at least one first touch electrode block and / or the second touch electrode block, and no dummy electrode is arranged in the first touch electrode block 411 and / or the second touch electrode block 421 that does not correspond to the first area, that is, the setting position of the dummy electrode is determined according to the position of the first area. It can be understood that the dummy electrode is set due to the setting requirement of the first area.

[0078] In other embodiments of the present disclosure, at least one dummy electrode is located between the first touch electrode block and the second touch electrode block. In this way, the dummy electrode can separate the first touch electrode block and the second touch electrode block to reduce the risk of the first touch electrode block and the second touch electrode block being connected together; in addition, at least part of the dummy electrode can be used to prepare a signal line connected to the first touch electrode or the second touch electrode, so that the signal line of the touch structure is arranged in the display area, thereby reducing the frame of the display panel.

[0079] In at least one embodiment of the present disclosure, the planar shape of the dummy electrode can be designed according to the planar shape of the first region, that is, the shape of the edge of the first touch electrode block 411 and / or the second touch electrode block 421 adjacent to the dummy electrode 401 is the same as the shape of the edge of the dummy electrode 401. Fig.10 and Fig.11 As shown, the edges of the dummy electrode 401 and the edges of the first region 13 are both circular in shape.

[0080] For example, in at least one embodiment of the present disclosure, Fig.12 and Fig.13 As shown, the edge of the dummy electrode 401 is curved. In this design, the curved edge can alleviate optical diffraction, interference and other phenomena at the edge of the dummy electrode 401 to reduce the optically visible phenomenon at the edge of the dummy electrode 401 (the shape regularity causes the optical phenomenon to be visually visible).

[0081] It should be noted that, in the embodiments of the present disclosure, the “curve shape” may include a wave shape, a sawtooth shape, and the like.

[0082] It should be noted that in the embodiments of the present disclosure, the two designs of the edge of the dummy electrode being conformal to the edge of the first region and the edge of the dummy electrode being designed to be curved coexist, and "conformal" refers to the similarity of shapes in the macroscopic scope, while "curved" refers to the design in the microscopic scope. For example, Fig.12 for Fig.11 The enlarged view of the structure of the region 13a and its surroundings is shown in FIG. Fig.11 In FIG. 4 , the overall shapes of the first region 13 (region 13b) and the dummy electrode 401 are both rectangular in macroscopic terms and the shapes of the two are roughly similar. Fig.12 In the figure, the edge shape of the dummy electrode 401 appears to be a curved line (sawtooth shape) at a microscopic level.

[0083] In the embodiments of the present disclosure, in order to ensure light transmittance, the touch electrode may be designed to be made of a transparent conductive material, or may be designed to be a grid structure to avoid blocking light emitted by the light emitting device.

[0084] For example, in some embodiments of the present disclosure, it is possible to refer to Figure 3The material of the touch electrode 400 includes a transparent conductive material. This design can simplify the preparation process of the touch electrode 400, and the touch electrode 400 will not block the light output of the light emitting device 220 to ensure the viewing angle of the display panel. For example, the transparent conductive material can be a material such as ITO.

[0085] For example, in some other embodiments of the present disclosure, Fig.13 and Fig.14 As shown, the touch electrode 400 is a grid electrode, and the meshes of the grid electrode correspond to the first opening 201 and the second opening 202 respectively, and the orthographic projection of the mesh on the substrate 100 coincides with the orthographic projection of the corresponding first opening 201 and the second opening 202 on the substrate 100, or is located within the orthographic projection of the corresponding first opening 201 and the second opening 202 on the substrate 100. Optionally, the material of the touch electrode 400 includes metal. The grid electrode will not block the light output of the light-emitting device 220, and this design can remove the restrictions on the preparation material of the touch electrode 400, so that the touch electrode 400 can use a material with high conductivity such as metal to reduce the load when driving the touch electrode 400.

[0086] In at least one embodiment of the present disclosure, Fig.14 As shown, the display panel may further include a first encapsulation layer 310, which is located on the side of the display function layer 200 away from the substrate 100 and includes a plurality of encapsulation units corresponding to the first openings 201, and at least a portion of the encapsulation units fills the corresponding first openings 201. The first encapsulation layer 310 protects the film layer of the light-emitting device 220 during the manufacturing process of the display panel. It should be noted that the light-emitting devices 220 with different colors of emitted light are independently manufactured, but the film layer (evaporated film layer such as the light-emitting function layer 223, etc.) in each light-emitting device 220 is evaporated on the entire surface of the display panel during evaporation. For example, the light-emitting device 220 is classified into light-emitting devices that emit red light (R), green light (G) and blue light (B), respectively. During the preparation process, the light-emitting devices R, G and B are prepared in sequence. When preparing the light-emitting device R, a light-emitting device R is formed in each first opening. A first encapsulation layer 310 is prepared on the display panel to cover the light-emitting device G. Then, the first encapsulation layer 310 in part of the first openings (used to form the light-emitting devices G and B in the final product) and the cathode and the light-emitting functional layer 223 of the light-emitting device R are removed. During this process, the first encapsulation layer 310 is used to protect the light-emitting devices R in other first openings. Based on this method, the light-emitting devices G and B are prepared in sequence, and finally a display panel as shown in FIG. Figure 3 The first encapsulation layer 310 is shown. It should be noted that, in the above preparation process, the first encapsulation layer 310 in the second via hole 202 can be removed to further increase the light transmittance of the first region.

[0087] It should be noted that the light emitting devices in the display panel can be configured to emit light of the same color (e.g., blue light, white light), and a light conversion layer (e.g., a material that can change the color of light, such as quantum dots), a color film, etc., are provided on the light emitting side of the display panel so that the display panel can display a color image. In this case, the first encapsulation layer 310 can also be configured as a continuous whole layer structure, and is not limited to the following. Fig.14 The one shown is composed of multiple packaging units.

[0088] In a specific embodiment of the first aspect of the present disclosure, the display panel also includes a second encapsulation layer 320 and a third encapsulation layer 330 covering the first encapsulation layer 310, the second encapsulation is located between the first encapsulation layer 310 and the third encapsulation layer 330, the touch structure is located on the side of the third encapsulation layer 330 away from the substrate 100, the first encapsulation layer 310 and the third encapsulation layer 330 are inorganic film layers, the inorganic layers have high density to isolate water and oxygen, the second encapsulation layer 320 is an organic film layer, and the surface of the second encapsulation layer 320 away from the substrate 100 is a plane.

[0089] In at least one embodiment of the present disclosure, Fig.14 The substrate 100 may include a substrate and a driving circuit layer located on the substrate, the driving circuit layer includes a plurality of pixel driving circuits located in the display area, and the display function layer is located on the driving circuit layer. For example, the pixel driving circuit may include a plurality of transistors TFT, capacitors, etc., for example, formed in various forms such as 2T1C (i.e., 2 transistors (TFT) and 1 capacitor (C)), 3T1C or 7T1C. The pixel driving circuit is connected to the light emitting device 200 to control the switching state and the light emitting brightness of the light emitting device 220.

[0090] For example, Fig.14 As shown, the display panel may further include structures such as an optical film 500 , a cover plate 600 , and the like.

[0091] It should be noted that, in the embodiments of the present disclosure, there is no limitation on the arrangement of pixels in the display panel and the specific arrangement of the second openings in the first region, and they can be designed according to actual process requirements.

[0092] For example, in some embodiments of the present disclosure, it is possible to refer to Figure 2 The sub-pixels may be arranged in a matrix manner into a plurality of rows and columns, and the second openings for transmitting light may be provided between adjacent rows and between adjacent columns.

[0093] For example, in some other embodiments of the present disclosure, Fig.15 As shown, the sub-pixels are arranged in multiple rows and columns, and the sub-pixels in adjacent rows are arranged in a staggered manner, and the sub-pixels in adjacent columns are arranged in a staggered manner, and a second opening for light transmission is set in the gap between every four adjacent sub-pixels.

[0094] In the embodiments of the present disclosure, there is no restriction on the distribution of the first area set in the display area, and it can be designed according to the application scenario of the display panel.

[0095] For example, in some embodiments of the present disclosure, the first regions are arranged in a plurality and spaced apart from each other, and are evenly arranged in the display area. In this design, the display panel can be applied to the transparent display field. For example, in this design, the dummy electrodes can be evenly arranged in the display area.

[0096] For example, in some other embodiments of the present disclosure, it is possible to refer to Figure 1 , the display area 11 also includes a second area 14, the transmittance of the second area 14 is less than the transmittance of the first area 13, and the isolation structure and the touch structure are also located in the second area 14. Optionally, in the case where the display area includes the second area 14, all the second openings 202 are located in the first area 13, and no second openings 202 are provided in the second area 14. In this design, the display panel can be applied to scenes such as under-screen camera, fingerprint recognition, infrared ranging, etc., and the first area 13 can be correspondingly designed as a camera area, a fingerprint recognition area, an infrared detection area, etc., and a camera, an infrared ranging device, etc. can be provided at the position corresponding to the first area 13. Optionally, in the case where the display area includes the second area 14, the size of the dummy electrode located in the second area 14 is different from that of the dummy electrode located in the first area 13, so that the size of the dummy electrode in the second area 14 can be not limited by the dummy electrode in the first area 13. The sizes of the dummy electrodes in the second region 14 may be the same, and the sizes of the dummy electrodes in the first region 13 may be related to the size of the identification device at the corresponding position of the first region 13, for example, the size of the dummy electrodes in the first region 13 is the same as or close to the size of the identification device at the corresponding position of the first region 13. The shapes of the dummy electrodes in the first region 13 may be the same as the shape of the identification device corresponding to the first region 13.

[0097] Optionally, when the display area includes the second area 14, the orthographic projection area of ​​the dummy electrode located in the second area 14 on the substrate is smaller than the orthographic projection area of ​​the dummy electrode located in the first area 13 on the substrate. In this way, the design area of ​​the part of the touch electrode used to realize the touch function can be guaranteed to ensure the accuracy of touch detection (for example, avoiding excessive touch sensitivity).

[0098] Optionally, when the display area includes the second region 14 , the shape of the dummy electrode in the second region 14 is different from that of the dummy electrode in the first region 13 , so that the shape of the dummy electrode in the second region 14 is not restricted by the dummy electrode in the first region 13 .

[0099] In at least one embodiment of the present disclosure, it is possible to refer to Figure 1 , the display area 11 also includes a second area 14, and all the second openings 202 are located in the first area 13. In this design, the display panel can be applied to scenes such as under-screen camera, fingerprint recognition, infrared ranging, etc., and the first area 13 can be correspondingly designed as a camera area, a fingerprint recognition area, an infrared detection area, etc.

[0100] Next, combine Figures 17 to 22 right Fig.14 The preparation process of the display panel shown is described to intuitively demonstrate the principle that the isolation structure can increase the pixel arrangement density PPI.

[0101] like Fig.17 As shown, a substrate 100 is provided and a first electrode 210 arranged in an array is formed on the substrate 100; an insulating material film layer (for example, an inorganic material film layer) is deposited on the substrate 100 on which the first electrode is formed; a support portion 211 and a crown portion 212 are formed on the display panel, wherein a first opening 201 and a second opening 202 are formed; a composition process is performed on the insulating material film layer to form a pixel defining layer 213 (the plane shape is a grid shape), the pixel defining layer 213 includes a third opening 203 and covers the gaps between adjacent first electrodes, so that the plane shape of the pixel defining layer 213 is a grid shape.

[0102] In an embodiment of the present disclosure, the patterning process may be a photolithography patterning process, which may include, for example, coating a photoresist on a structure layer to be patterned, exposing the photoresist using a mask, developing the exposed photoresist to obtain a photoresist pattern, etching the structure layer using the photoresist pattern (optionally wet etching or dry etching), and then optionally removing the photoresist pattern. It should be noted that, in the case where the material of the structure layer (such as the photoresist pattern 700 described below) includes photoresist, the structure layer may be directly exposed through a mask to form a desired pattern.

[0103] like Fig.18 As shown, a light-emitting functional layer and a second electrode are evaporated on the substrate 100 to form a light-emitting device 220 in each first opening 201 of the isolation structure 210. The evaporation in this process does not use a fine metal mask, so the evaporated material is also deposited on the crown 212 and in the second opening 202. For example, the light-emitting functional layer in the evaporated light-emitting device 220 can emit red light (R), that is, at this stage, a light-emitting device 220 emitting blue light is formed in each first opening 201 and second opening 202 of the isolation structure 210.

[0104] like Fig.19As shown, a first encapsulation layer 310 is deposited to cover the light-emitting device 200. The first encapsulation layer 310 will cover the entire display area at this stage. A photoresist is formed (e.g., coated) on the first encapsulation layer 310, and then a composition process is performed on it to form a photoresist pattern 700. The photoresist pattern 700 only covers a portion of the first opening 201 of the isolation structure 210 (the first opening 201 where the light-emitting device B of the finished display panel is located).

[0105] like Fig. 20 As shown, the surface of the display panel is etched using the photoresist pattern 700 as a mask to remove the first encapsulation layer 310 , the second electrode and the light-emitting functional layer covered by the photoresist pattern 700 ; and then the remaining photoresist pattern 700 is removed.

[0106] like Fig.21 As shown, repeat the above Figures 17 to 20 The steps shown are performed to form light emitting devices 220 emitting green light and blue light in the other first openings 201 .

[0107] like Fig. 22 As shown, a second encapsulation layer 320 and a third encapsulation layer 330 are formed on the first encapsulation layer 310 , respectively.

[0108] See again Fig.14 , a touch electrode 400 is prepared on the third encapsulation layer 330 , and the preparation process thereof can refer to the relevant description in the aforementioned embodiment, which will not be described in detail here.

[0109] It should be noted that in some embodiments of the present disclosure, some film layers in the light-emitting functional layer, such as the light-emitting layer, can be prepared by non-evaporation methods such as inkjet printing. The specific method can be selected according to the materials of these film layers. For example, when these film layers are made of polymer materials and are not suitable for evaporation, inkjet printing can be used to prepare them.

[0110] At least one embodiment of the present disclosure provides a display device, which may include the display panel in the above embodiment. In addition, when the first area is an identification area, the display device may include an identification device, and the orthographic projection of the identification device on the substrate at least partially overlaps with the first area.

[0111] For example, in some embodiments of the present disclosure, it is possible to refer to Figure 1 and Fig.23The display area 11 also includes a second area 14, and the transmittance of the second area 14 is less than the transmittance of the first area 13. The display device also includes at least one identification device 20 corresponding to the first area 13. The identification device 20 is located on the side of the substrate 100 of the display panel that is away from the isolation structure 210, and the orthographic projection of the first area 13 on the substrate 100 coincides with the orthographic projection of the identification device 20 on the substrate 100, or the orthographic projection of the identification device 20 on the substrate 100 is located within the orthographic projection of the first area 13 on the substrate 100.

[0112] For example, in some embodiments of the present disclosure, Fig.23 As shown, the identification device 20 includes at least one fingerprint identification sensor. For example, the fingerprint identification sensor can be arranged on a side of the substrate away from the display function layer, or the fingerprint identification sensor can also be arranged inside the substrate. Fig.24 As shown, there are a plurality of second openings 202 in the first area 13 , and the orthographic projection of the identification device 20 on the substrate 100 is located within the orthographic projection of the first area 13 on the substrate 100 .

[0113] For example, in some other embodiments of the present disclosure, the identification device 20 may be a functional device such as a camera, an infrared ranging device, etc. These functional devices may be located on a side of the substrate away from the display functional layer.

[0114] In at least one embodiment of the present disclosure, Fig.23 As shown, the display device also includes a foam layer 30, which is located on the side of the substrate in the display panel away from the display function layer. The foam layer 30 includes a light-transmitting opening 31, and the orthographic projection of the identification device 20 on the substrate is located within the orthographic projection of the light-transmitting opening 31 on the substrate.

[0115] For example, in the embodiments of the present disclosure, the display device may be any product or component with a display function, such as a television, a digital camera, a mobile phone, a watch, a tablet computer, a laptop computer, a navigator, or the like.

[0116] The above description is only a preferred embodiment of this specification and is not intended to limit this specification. Any modifications, equivalent substitutions, etc. made within the spirit and principles of this specification should be included in the protection scope of this specification.

Claims

1. A display panel, characterized in that: The display panel includes a display area, wherein the display area includes at least one first area, wherein the display panel includes: substrate; A display function layer, located on the substrate and comprising a plurality of light-emitting devices; an isolation structure located on the substrate and in the display area, wherein the isolation structure includes a plurality of first openings and a plurality of second openings located in the first area, the first openings defining the light emitting device; and The touch structure is located on a side of the isolation structure away from the substrate and includes a touch electrode, wherein the touch electrode includes a dummy electrode, and an orthographic projection of at least one of the second openings on the substrate is located within an orthographic projection of the dummy electrode on the substrate.

2. The display panel according to claim 1, characterized in that: The orthographic projection of the first region on the substrate overlaps with the orthographic projection of the dummy electrode on the substrate; Preferably, the orthographic projection of the dummy electrode on the substrate is located within the orthographic projection of the first region on the substrate; or Preferably, the orthographic projection of the first region on the substrate is located within the orthographic projection of the dummy electrode on the substrate.

3. The display panel according to claim 1, characterized in that: The light emitting device comprises a first electrode, a light emitting functional layer and a second electrode sequentially stacked on the substrate, wherein the light emitting functional layer is located in the first opening; as well as The isolation structure comprises a support portion and a crown portion, wherein the support portion is located between the crown portion and the base, the support portion and the crown portion surround the first opening and the second opening, and the orthographic projection of the support portion on the base is located between the orthographic projections of the crown portion on the base; Preferably, the support portion is a conductive structure, and the second electrode is located in the first opening and connected to the support portion; Preferably, the display panel also includes a pixel defining layer, wherein the pixel defining layer is located between the supporting portion and the substrate and is surrounded by a plurality of third openings corresponding to the first openings respectively, the orthographic projections of the third openings on the substrate are located within the orthographic projections of the corresponding first openings on the substrate to expose the first electrode, and an edge portion of the first electrode is located between the pixel defining layer and the substrate.

4. The display panel according to any one of claims 1 to 3, characterized in that: The touch electrodes further include a plurality of parallel first touch electrodes and a plurality of parallel second touch electrodes, wherein the first touch electrodes and the second touch electrodes intersect each other and are spaced apart from the dummy electrodes. The first touch electrode includes a plurality of first connecting portions and a plurality of first touch electrode blocks spaced apart from each other by the second touch electrodes, the first touch electrode blocks of the same first touch electrode are connected to each other via the first connecting portions, the second touch electrode includes a plurality of second connecting portions and a plurality of second touch electrode blocks spaced apart from each other by the first touch electrodes, the second touch electrode blocks of the same second touch electrode are connected to each other via the second connecting portions, and The first touch electrode block, the second touch electrode block and the dummy electrode are in the same layer and made of the same material, and the second connecting portion and the first connecting portion cross each other and are spaced apart from each other.

5. The display panel according to claim 4, characterized in that: At least one of the dummy electrodes is located within the first touch electrode block and / or the second touch electrode block, Preferably, the dummy electrodes are arranged inside all the first touch electrode blocks and the second touch electrode blocks, or the dummy electrodes corresponding to the first area are arranged inside at least one of the first touch electrode blocks and / or the second touch electrode blocks, and the dummy electrodes are not arranged in the first touch electrode blocks and / or the second touch electrode blocks that do not correspond to the first area. and / or At least one of the dummy electrodes is located between the first touch electrode block and the second touch electrode block.

6. The display panel according to claim 4, characterized in that: The shape of the edge of the first touch electrode block and / or the second touch electrode block adjacent to the dummy electrode is the same as the shape of the edge of the dummy electrode; Preferably, the edge of the dummy electrode is in a curved shape.

7. The display panel according to any one of claims 1 to 3, characterized in that: The material of the touch electrode includes a transparent conductive material; or The touch electrode is a grid-shaped electrode, and the mesh holes of the grid-shaped electrode correspond to the first opening and the second opening respectively. The orthographic projection of the mesh holes on the substrate coincides with the orthographic projection of the corresponding first opening and the second opening on the substrate, or is located within the orthographic projection of the corresponding first opening and the second opening on the substrate. Preferably, the material of the touch electrode includes metal.

8. The display panel according to any one of claims 1 to 3, characterized in that: Also includes: A first encapsulation layer is located on a side of the display function layer away from the substrate and includes a plurality of encapsulation units corresponding to the first openings, wherein at least a portion of the encapsulation units fills the corresponding first openings; Preferably, the display panel further comprises a second encapsulation layer and a third encapsulation layer covering the first encapsulation layer, the second encapsulation is located between the first encapsulation layer and the third encapsulation layer, the touch structure is located on a side of the third encapsulation layer away from the substrate, and The first encapsulation layer and the third encapsulation layer are inorganic film layers, the second encapsulation layer is an organic film layer, and a surface of the second encapsulation layer facing away from the substrate is a plane.

9. The display panel according to any one of claims 1 to 3, characterized in that: The first areas are multiple and spaced apart from each other and evenly arranged in the display area; or The display area further includes a second area, the light transmittance of the second area is lower than the light transmittance of the first area, and the isolation structure and the touch control structure are also located in the second area; Preferably, the dummy electrodes located in the second region are different in size from the dummy electrodes located in the first region; Preferably, the orthographic projection area of ​​the dummy electrode located in the second region on the substrate is smaller than the orthographic projection area of ​​the dummy electrode located in the first region on the substrate; Preferably, the dummy electrodes located in the second region are different in shape from the dummy electrodes located in the first region; Preferably, all of the second openings are located in the first region.

10. A display device, characterized in that: A display panel comprising any one of claims 1 to 9.

11. The display device according to claim 10, characterized in that: Also included is at least one identification device corresponding to the first area, wherein the orthographic projection of the first area on the substrate coincides with the orthographic projection of the identification device on the substrate, or the orthographic projection of the identification device on the substrate is located within the orthographic projection of the first area on the substrate; Preferably, the dummy electrode in the first region has the same shape as the identification device corresponding to the first region; Preferably, the display device further comprises a foam layer, the foam layer is located on a side of the substrate in the display panel away from the display function layer, the foam layer comprises a light-transmitting opening, and the orthographic projection of the identification device on the substrate is located within the orthographic projection of the light-transmitting opening on the substrate.

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