Touch display panel, preparation method thereof and display device

Abstract

The invention provides a touch display panel, a preparation method thereof and a display device. The problem that in the prior art, the display effect of a display panel is poor is solved. The touch display panel comprises: a substrate; the isolation structure is located on one side of the substrate, and a plurality of isolation openings are defined by the isolation structure; the sub-pixels are at least partially located in the isolation openings, each sub-pixel comprises a first electrode and a second electrode which are stacked, and the first electrode is located on the side, close to the substrate, of the second electrode; the second touch electrode comprises a plurality of main body parts and bridging parts for connecting the adjacent main body parts; the first touch electrodes and the main body part are arranged on the same layer as the first electrodes and are positioned in interval areas between the adjacent first electrodes; the bridging part and the main body part are arranged on different layers, and the orthographic projection of the bridging part on the substrate and the orthographic projection of the first touch electrode on the substrate are overlapped.

Description

Technical Field

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

[0002] Organic Light Emitting Diodes (OLEDs) are considered the next generation of flat-panel display technology after liquid crystal displays (LCDs). They are widely favored by users for their exceptional color and image quality. As user demand for display quality increases, the need for further improvements in the display quality of OLED display panels is driving demand. Summary of the Invention

[0003] In view of this, embodiments of the present application provide a touch display panel and a method for manufacturing the same, as well as a display device, which solve the problem of poor display effect of OLED display panels in the prior art.

[0004] In a first aspect, the present application provides a touch display panel, comprising: a substrate; an isolation structure located on one side of the substrate, the isolation structure enclosing a plurality of isolation openings; a plurality of sub-pixels, the sub-pixels being at least partially located within the isolation openings, the sub-pixels comprising a stacked first electrode and a second electrode, the first electrode being located on a side of the second electrode close to the substrate; and a first touch electrode and a second touch electrode, the second touch electrode comprising a plurality of main bodies and a bridging portion connecting adjacent main bodies; the first touch electrode and the main body being arranged in the same layer as the first electrode and being located in the spacing region between adjacent first electrodes; the bridging portion and the main body being arranged in different layers, the orthographic projection of the bridging portion on the substrate overlapping the orthographic projection of the first touch electrode on the substrate.

[0005] In combination with the first aspect, in some possible implementations, either the first touch electrode and the main body includes multiple touch sub-parts connected as one, and the touch sub-parts at least partially surround the first electrode; preferably, a first electrode is arranged in the isolation opening, and a touch sub-part at least partially surrounds the first electrode; preferably, a first electrode is arranged in the isolation opening, and multiple touch sub-parts are arranged at intervals around the first electrode; preferably, multiple first electrodes are arranged in at least part of the isolation opening, and one touch sub-part at least partially surrounds multiple first electrodes in the same isolation opening; preferably, multiple first electrodes are arranged in at least part of the isolation opening, and multiple touch sub-parts are arranged at intervals around multiple first electrodes in the same isolation opening.

[0006] In combination with the first aspect, in some possible implementations, either the first touch electrode or the main body has a mesh structure, and the touch sub-portion includes a grid that surrounds the first electrode.

[0007] In combination with the first aspect, in some possible implementations, either the first touch electrode and the main body further includes multiple connecting sub-parts, and the multiple touch sub-parts are connected into one through the multiple connecting sub-parts; preferably, the touch sub-parts and the connecting sub-parts in the first touch electrode are alternately connected; preferably, the touch sub-parts and the connecting sub-parts in the main body are alternately connected.

[0008] In combination with the first aspect, in some possible implementations, the bridging portion and the isolation structure are arranged on the same layer; preferably, the isolation structure includes a through hole, the bridging portion is located in the through hole, and is spaced apart from the isolation structure; preferably, the bridging portion and the isolation structure are insulated from each other.

[0009] In combination with the first aspect, in some possible implementations, the touch display panel also includes a first insulating layer, which is located at least between the isolation structure and the first touch electrode, and between the isolation structure and the main body, and the orthographic projection of the first insulating layer on the substrate covers the area between the orthographic projections of adjacent first electrodes on the substrate; preferably, the bridging portion contacts the main body through a conductive via passing through the first insulating layer; preferably, the orthographic projection of the first insulating layer on the substrate also covers the edge area of ​​the first electrode; preferably, the second insulating layer includes a pixel definition layer.

[0010] In combination with the first aspect, in some possible implementations, the touch display panel further includes a second insulating layer, and the second insulating layer fills the area between the isolation structure and the bridging portion.

[0011] In combination with the first aspect, in some possible implementations, the touch display panel further includes a first encapsulation layer, the first encapsulation layer includes a plurality of encapsulation parts, and the encapsulation parts fill the area between the isolation structure and the bridging part.

[0012] In combination with the first aspect, in some possible implementations, the substrate includes at least one metal layer, and the bridging portion is located in any metal layer; preferably, the at least one metal layer includes at least one of a data signal line, a scan line, a reference voltage signal line, and a power signal line.

[0013] In combination with the first aspect, in some possible implementations, the isolation structure includes a stacked first support portion and a first crown portion, the first support portion is located on a side of the first crown portion close to the substrate, and the orthographic projection of the first support portion on the substrate is located within the range of the orthographic projection of the first crown portion on the substrate; preferably, the isolation structure also includes a first base, located on a side of the first support portion close to the substrate, and the orthographic projection of the first support portion on the substrate is located within the range of the orthographic projection of the first base on the substrate.

[0014] In combination with the first aspect, in some possible implementations, the bridging portion includes a stacked second supporting portion and a second crown portion, the second supporting portion is located on a side of the second crown portion close to the substrate, and the orthographic projection of the second supporting portion on the substrate is located within the range of the orthographic projection of the second crown portion on the substrate; preferably, the bridging portion also includes a second base, located on a side of the second supporting portion close to the substrate, and the orthographic projection of the second supporting portion on the substrate is located within the range of the orthographic projection of the second base on the substrate.

[0015] In combination with the first aspect, in some possible implementations, the isolation structure includes a first supporting portion, the bridging portion includes a second supporting portion, and the first supporting portion and the second supporting portion are arranged on the same layer; preferably, the isolation structure also includes a first crown portion, which is located on the side of the first supporting portion facing away from the substrate; the bridging portion also includes a second crown portion, which is located on the side of the second supporting portion facing away from the substrate; the first crown portion and the second crown portion are arranged on the same layer; preferably, the isolation structure also includes a first base, which is located on the side of the first supporting portion close to the substrate; the bridging portion also includes a second base, which is located on the side of the second supporting portion close to the substrate; the first base and the second base are arranged on the same layer.

[0016] In combination with the first aspect, in some possible implementations, the touch display panel also includes a first encapsulation layer, the first encapsulation layer includes a plurality of encapsulation parts, the encapsulation parts correspond to the isolation openings one-to-one, and the encapsulation parts cover the surface of the sub-pixel facing away from the substrate; preferably, the encapsulation parts extend to the edge of the surface of the isolation structure facing away from the substrate; preferably, the isolation structure includes a through hole, the bridging part is located in the through hole and is spaced apart from the isolation structure, and the encapsulation part fills the area between the isolation structure and the bridging part; preferably, the touch display panel also includes a second encapsulation layer, located on the side of the first encapsulation layer facing away from the substrate, the orthographic projection of the second encapsulation layer on the substrate at least covers the orthographic projection of the isolation structure and each sub-pixel on the substrate; preferably, the touch display panel also includes a third encapsulation layer, located on the side of the second encapsulation layer facing away from the substrate, the materials of the first encapsulation layer and the third encapsulation layer include inorganic materials, and the material of the second encapsulation layer includes organic materials.

[0017] In a second aspect, the present application provides another touch display panel, comprising: a substrate; a patterned conductive layer located on one side of the substrate; the patterned conductive layer comprising a plurality of first electrodes, and a first touch electrode and a plurality of main bodies located between adjacent first electrodes; a patterned structural layer located on the side of the patterned conductive layer facing away from the substrate; the patterned structural layer comprising an isolation structure and a bridging portion; the orthographic projection of the isolation structure on the substrate is at least located between the orthographic projections of adjacent first electrodes on the substrate, the isolation structure encloses an isolation opening, and the isolation opening exposes the first electrodes; the isolation structure comprises a through hole, the bridging portion is located in the through hole, the bridging portion is connected to adjacent main bodies by means of a conductive via, the orthographic projection of the bridging portion on the substrate intersects with the orthographic projection of the first touch electrode on the substrate; and a plurality of sub-pixels, the sub-pixels being located in the isolation opening.

[0018] According to a third aspect of the present application, a method for preparing a touch display panel is provided, comprising: preparing an isolation structure, a plurality of sub-pixels, a first touch electrode, and a second touch electrode on a substrate to obtain a touch display panel; wherein the isolation structure encloses a plurality of isolation openings, the sub-pixels are at least partially located within the isolation openings, the sub-pixels include a first electrode and a second electrode stacked together, the first electrode being located on a side of the second electrode close to the substrate; the second touch electrode includes a plurality of main bodies and a bridging portion connecting adjacent main bodies; the first touch electrode and the main body are arranged in the same layer as the first electrode and are located in the spacing area between adjacent first electrodes; the bridging portion and the main body are arranged in different layers, and the orthographic projection of the bridging portion on the substrate overlaps with the orthographic projection of the first touch electrode on the substrate.

[0019] In combination with the third aspect, in some possible implementations, an isolation structure, multiple sub-pixels, a first touch electrode and a second touch electrode are prepared on a substrate to obtain a touch display panel, including: preparing a patterned conductive layer on the substrate to obtain multiple first electrodes, and a first touch electrode and multiple main bodies located between adjacent first electrodes; preparing a patterned structural layer on the side of the patterned conductive layer facing away from the substrate, the patterned structural layer being located between adjacent first electrodes and covering the first touch electrodes and the main bodies; the patterned structural layer including an isolation structure and a bridging portion, the isolation structure enclosing multiple isolation openings, the isolation openings at least partially exposing the first electrodes, and the bridging portion connecting adjacent main bodies; and sequentially preparing at least one organic layer and a second electrode in the isolation openings to obtain a touch display panel.

[0020] In combination with the third aspect, in some possible implementations, before preparing the patterned structural layer on the side of the patterned conductive layer facing away from the substrate, it also includes: preparing a first insulating layer on the side of the patterned conductive layer facing away from the substrate, the first insulating layer is located between adjacent first electrodes, and the bridging portion is connected to the adjacent main body portions through a conductive via passing through the first insulating layer.

[0021] In combination with the third aspect, in some possible implementations, the isolation structure includes a through hole, the bridging portion is located in the through hole, and is spaced apart from the isolation structure; the preparation method further includes: preparing a second insulating layer between the isolation structure and the bridging portion.

[0022] In combination with the third aspect, in some possible implementations, the isolation structure includes a through hole, the bridging portion is located in the through hole, and is spaced apart from the isolation structure; the preparation method also includes: preparing a first packaging layer on the side of the second electrode facing away from the substrate, the first packaging layer including multiple packaging portions, the packaging portions corresponding one-to-one to the isolation openings, the packaging portions covering the surface of the second electrode facing away from the substrate, and extending to the area between the isolation structure and the bridging portion; the preparation method also includes: sequentially preparing a second packaging layer and a third packaging layer on the side of the first packaging layer facing away from the substrate.

[0023] A fourth aspect of the present application provides a display device, comprising the touch display panel provided by any of the above embodiments.

[0024] According to the touch display panel, preparation method thereof, and display device provided in the embodiments of the present application, by arranging the main body of the first touch electrode and the second touch electrode in the same layer as the first electrode of the sub-pixel, the first touch electrode and the second touch electrode are prevented from blocking the light output of the sub-pixel, thereby improving the transmittance, reducing the degree of color deviation at large viewing angles, and thus improving the display effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1a It is a schematic diagram of a partial top view of the touch display panel in the related art.

[0026] Figure 1b for Figure 1a A partial enlarged view of the touch display panel shown.

[0027] Figure 1c for Figure 1a The cross-sectional structure diagram of the touch display panel is shown.

[0028] Figure 2a This is a schematic top view of the touch display panel provided in the first embodiment of the present application.

[0029] Figure 2b for Figure 2a A partial enlarged view of the touch display panel shown.

[0030] Figure 2c for Figure 2b The enlarged partial view shown is a schematic diagram of the cross-sectional structure along line B1B2.

[0031] Figure 2d for Figure 2b The enlarged partial view shown is a schematic diagram of the cross-sectional structure along C1C2.

[0032] Figure 3 This is a partial enlarged view of the touch display panel provided in the second embodiment of the present application.

[0033] Figure 4 This is a partial enlarged view of the touch display panel provided in the third embodiment of the present application.

[0034] Figure 5 This is a partial enlarged view of the touch display panel provided in the fourth embodiment of the present application.

[0035] Figure 6 This is a partially enlarged view of the touch display panel provided in the fifth embodiment of the present application.

[0036] Figure 7 This is a schematic top view of the touch display panel provided in the sixth embodiment of the present application.

[0037] Figure 8 This is a schematic cross-sectional structural diagram of a touch display panel provided in the seventh embodiment of the present application.

[0038] Figure 9 This is a schematic cross-sectional structural diagram of a touch display panel provided in the eighth embodiment of the present application.

[0039] Figure 10 This is a schematic cross-sectional structural diagram of a touch display panel provided in the ninth embodiment of the present application.

[0040] Figure 11 This is a schematic flow chart of a method for manufacturing a touch display panel provided in the first embodiment of the present application.

[0041] Figure 12 A schematic flow chart of a method for manufacturing a touch display panel according to the second embodiment of the present application.

[0042] Figure 13 This is a schematic flow chart of a method for manufacturing a touch display panel provided in the third embodiment of the present application.

[0043] Figure 14 A schematic structural diagram of a display device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0044] During the process of implementing the present invention, the inventors discovered the following problems in the related art: as the resolution of display products increases, the touch electrodes will block the light output of sub-pixels, resulting in poor display effects.

[0045] Specifically, Figure 1a It is a schematic diagram of a partial top view of the touch display panel in the related art. Figure 1b for Figure 1a A partial enlarged view of the touch display panel shown. Figure 1c for Figure 1a The cross-sectional structure diagram of the touch display panel is shown. Figure 1c The cross-sectional structure shown corresponds to Figure 1a Section lines A1A2 in the diagram. Figure 1a-Figure 1cAs shown, a conventional touch display panel integrates a first touch electrode 14 and a second touch electrode 15 arranged in a cross pattern to realize the touch function. Either the first touch electrode 14 or the second touch electrode 15 includes a mesh of touch metal wires, which are arranged in the spacing area between adjacent sub-pixels. As the resolution increases, the display effect deteriorates. At the same time, the preparation process of the first touch electrode 14 and the second touch electrode 15 requires multiple use of the mask plate, and alignment errors are easily introduced during the mask plate alignment process; and the first touch electrode 14 and the second touch electrode 15 are arranged outside the display panel 10, which will increase the overall thickness of the touch display panel, which is not conducive to the thinning of the product.

[0046] In view of this, the present application provides a touch display panel, a method for manufacturing the same, and a display device. By placing the main bodies of the first and second touch electrodes in the same layer as the first electrodes of the sub-pixels, the first and second touch electrodes prevent light from being blocked by the sub-pixels, thereby improving transmittance, reducing the degree of color shift at large viewing angles, and thereby enhancing the display quality. In a further embodiment, the first and second touch electrodes are fully integrated within the display panel and manufactured simultaneously with certain film layers of the display panel, making the touch display panel thinner and simplifying the manufacturing process by omitting multiple mask alignment steps.

[0047] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0048] In the accompanying drawings, the dimensions of layers and regions may be exaggerated for clarity. It will be understood that when a structure is referred to as being "on or under" another structure, the structure may be directly above or below the other structure, or intervening structures may be present. Like reference numerals refer to like structures throughout. References to structures herein include any of layers, elements, devices, components, and assemblies.

[0049] When a structure is referred to as being "connected" to another structure, the structure can be directly connected to the other structure or indirectly connected to the other structure with one or more intervening structures interposed therebetween.

[0050] Figure 2a This is a schematic top view of the touch display panel provided in the first embodiment of the present application. Figure 2b for Figure 2a A partial enlarged view of the touch display panel shown. Figure 2c for Figure 2bThe enlarged partial view shown is a schematic diagram of the cross-sectional structure along line B1B2. Figure 2d for Figure 2b The enlarged partial view is a schematic diagram of the cross-sectional structure along C1C2. Figure 2a-2d As shown, the touch display panel includes a substrate 11 , an isolation structure 12 , a plurality of sub-pixels 13 , a first touch electrode 14 and a second touch electrode 15 .

[0051] The substrate 11 may be a base substrate or an array substrate integrated with pixel circuits. The base substrate may be a hard substrate, such as a glass substrate, or a flexible substrate, such as a polyimide film or ultra-thin glass.

[0052] The isolation structure 12 is located on one side of the substrate 11 and encloses a plurality of isolation openings 120. The isolation structure 12 has a partitioning function and can isolate the film layer deposited on the side of the isolation structure 12 away from the substrate 11.

[0053] The sub-pixel 13 is at least partially located in the isolation opening 120, and one or more sub-pixels 13 can be set in the same isolation opening 120. The sub-pixel 13 is also called a light-emitting device, such as an organic light-emitting diode or a quantum dot light-emitting diode. The multiple sub-pixels 13 may include multiple color sub-pixels, such as multiple red sub-pixels, green sub-pixels and blue sub-pixels. The sub-pixel 13 includes a stacked first electrode 131, a second electrode 132, and at least one organic layer 133 located between the first electrode 131 and the second electrode 132. The first electrode 131 is located on the side of the second electrode 132 close to the substrate 11. Exemplarily, the first electrode 131 is a cathode and the second electrode 132 is an anode; or, the first electrode 131 is an anode and the second electrode 132 is a cathode. It should be noted that Figure 2a Only the first electrodes 131 of some sub-pixels 13 are shown. The at least one organic layer 133 includes a light-emitting layer and may further include at least one of a hole injection layer, a hole transport layer, and an electron blocking layer located between the first electrode 131 and the light-emitting layer, and at least one of an electron injection layer, an electron transport layer, and a hole blocking layer located between the second electrode 132 and the light-emitting layer.

[0054] The second touch electrode 15 includes a plurality of main bodies 151 and a bridging portion 152 connecting adjacent main bodies 151. The first touch electrode 14 and the main body 151 are arranged on the same layer as the first electrode 131 and are located in the spacing area between adjacent first electrodes 131. The bridging portion 152 and the main body 151 are arranged on different layers, and the bridging portion 152 connects adjacent main bodies 151 through conductive vias. The orthographic projection of the bridging portion 152 on the substrate 11 overlaps with the orthographic projection of the first touch electrode 14 on the substrate 11 to achieve overlap between the first touch electrode 14 and the second touch electrode 15. This embodiment does not limit the position of the film layer where the bridging portion 152 is located in the thickness direction of the touch display panel.

[0055] According to the touch display panel, its manufacturing method, and display device provided in this embodiment, by arranging the main body 151 of the first touch electrode 14 and the second touch electrode 15 in the same layer as the first electrode 131 of the sub-pixel, the first touch electrode 14 and the second touch electrode 15 are prevented from blocking the light output of the sub-pixel, thereby improving the transmittance, reducing the degree of color deviation at large viewing angles, and thus improving the display effect. At the same time, the manufacturing process is simplified, which is conducive to product thinning.

[0056] In one embodiment, see Figure 2a-2d , either the first touch electrode 14 or the main body 151 includes a plurality of touch sub-portions 1451 connected as one body, and the touch sub-portion 1451 at least partially surrounds the first electrode 131. Specifically, in this embodiment, a first electrode 131 is provided in the isolation opening 120, and the touch sub-portion 1451 is annular and surrounds the first electrode 131. The touch sub-portion 1451 can be a regular ring, such as a rectangular ring, a circular ring, etc.; or it can be an irregular ring. In one embodiment, the shape of the touch sub-portion 1451 is adapted to the edge shape of the first electrode 131. Exemplarily, if the edge shape of the first electrode 131 is circular, the touch sub-portion 1451 is a circular ring; if the edge shape of the first electrode 131 is rectangular, the touch sub-portion is a rectangular ring. In one embodiment, the shape of the touch sub-portion 1451 is adapted to the shape of the isolation opening 120.

[0057] In one embodiment, either the first touch electrode 14 or the main body 151 has a mesh structure, and the touch sub-portion 1451 includes a mesh that surrounds the first electrode 131 .

[0058] In one embodiment, see Figure 2a-2d Either the first touch electrode 14 or the main body 151 further includes a plurality of connecting sub-parts 1452 , and the plurality of touch sub-parts 1451 are connected as a whole via the plurality of connecting sub-parts 1452 . The connecting sub-parts 1452 connect adjacent touch sub-parts 1451 , and each touch sub-part 1451 is connected to one or more connecting sub-parts 1452 .

[0059] In one embodiment, see Figure 2a-2d The isolation structure 12 includes a first support portion 121 and a first crown portion 122. The first support portion 121 is located on the side of the first crown portion 122 close to the substrate 11, and the orthographic projection of the first support portion 121 on the substrate 11 is located within the orthographic projection range of the first crown portion 122 on the substrate 11. The material of the first crown portion 122 can be an inorganic material, an organic material, or a metal material. When the first crown portion 122 is a metal material, the material of the first crown portion 122 can be titanium. The first support portion 121 can be designed as an independent film layer, that is, there is no physical interface inside the first support portion 121, and each part is composed of the same material. Alternatively, the first support portion 121 can be designed to be composed of at least two film layers stacked together. For example, the first support portion 121 is formed by stacking two conductive film layers. The materials of the two conductive film layers can be molybdenum and aluminum, respectively, and the conductive film layer composed of molybdenum is located between the substrate 11 and the conductive film layer composed of aluminum.

[0060] In other embodiments, the isolation structure 12 further includes a first base 123 located on the side of the first support portion 121 close to the substrate 11, with the orthographic projection of the first support portion 121 on the substrate 11 located within the orthographic projection of the first base 123 on the substrate 11. Exemplarily, the material of the first base 123 is molybdenum. In this case, the material of the first support portion 121 can be aluminum.

[0061] In one embodiment, see Figure 2a-2d The bridge portion 152 is provided on the same layer as the isolation structure 12. For example, the isolation structure 12 includes a through hole, and the bridge portion 152 is located within the through hole and spaced apart from the isolation structure 12. The bridge portion 152 and the isolation structure 12 are insulated from each other. This has the advantage of further simplifying the manufacturing process and facilitating a thinner product.

[0062] In this case, the bridge portion 152 includes a stacked second support portion 1521 and a second crown portion 1522. The second support portion 1521 is located on the side of the second crown portion 1522 closest to the substrate 11, and the orthographic projection of the second support portion 1522 on the substrate 11 is within the orthographic projection of the second crown portion 1522 on the substrate 11. Optionally, the second support portion 1521 and the first support portion 121 are provided on the same layer, and the second crown portion 1522 and the first crown portion 122 are provided on the same layer. In one embodiment, the bridge portion 152 may further include a second base 1523 located on the side of the second support portion 1521 closest to the substrate 11, and the orthographic projection of the second support portion 1521 on the substrate 11 is within the orthographic projection of the second base 1523 on the substrate 11. The second base 1523 and the first base 123 are provided on the same layer.

[0063] In one embodiment, see Figure 2a-2dThe touch display panel also includes a first insulating layer 16, which is located at least between the isolation structure 12 and the first touch electrode 14, and between the isolation structure 12 and the main body 151. The orthographic projection of the first insulating layer 16 on the substrate 11 covers the spacing area between the orthographic projections of adjacent first electrodes 131 on the substrate 11. Preferably, the bridging portion 152 is in contact with the main body 151 through a conductive via penetrating the first insulating layer 16. The orthographic projection of the first insulating layer 16 on the substrate 11 can also extend to cover the edge area of ​​the first electrode 131. Exemplarily, the first insulating layer 16 includes a pixel definition layer. The pixel definition layer encloses a pixel opening 130, and the orthographic projection of the pixel opening 130 on the substrate 11 is located within the orthographic projection range of the isolation opening 120 on the substrate 11. The sub-pixel 13 is at least partially located within the pixel opening 130.

[0064] In one embodiment, the touch display panel further includes a pixel circuit located between the sub-pixel 13 and the substrate 11. The pixel circuit is connected to the sub-pixel 13 and is used to drive the sub-pixel 13 to display according to a predetermined grayscale. The pixel circuit can be 7T1C, 8T1C, etc.

[0065] Figure 3 This is a partial enlarged view of the touch display panel provided in the second embodiment of the present application. Figure 3 and Figure 2b It can be seen that the difference is that Figure 3 In the touch display panel shown, the touch sub-portion 1451 partially surrounds the first electrode 131. This is equivalent to, Figure 3 The touch sub-section 1451 is shown in Figure 2a The touch sub-portion 1451 is provided with a notch on its base. For example, the touch sub-portion 1451 is U-shaped.

[0066] Figure 4 This is a partial enlarged view of the touch display panel provided in the third embodiment of the present application. Figure 4 and Figure 2b 、 Figure 3 It can be seen that the difference is that Figure 4 In the touch display panel shown in FIG. 1 , a plurality of touch sub-portions 1451 are arranged at intervals around the first electrode 131. For example, Figure 4 As shown, the same first electrode 131 is surrounded by two touch-sensing sub-portions 1451 , and the two touch-sensing sub-portions 1451 are arranged opposite to each other.

[0067] Figure 5 This is a partial enlarged view of the touch display panel provided in the fourth embodiment of the present application. Figure 5 and Figure 2b 、 Figure 3 、 Figure 4 It can be seen that the difference is that Figure 5In the touch display panel shown, a plurality of first electrodes 131 are disposed in at least a portion of the isolation opening 120 , and a touch sub-portion 1451 at least partially surrounds the plurality of first electrodes 131 in the same isolation opening 120 .

[0068] For example, Figure 5 As shown, a plurality of first electrodes 131 are disposed within a portion of the isolation openings 120, and the remaining isolation openings 120 correspond one-to-one to the first electrodes 131. Exemplarily, the plurality of first electrodes 131 within the same isolation opening 120 correspond to a plurality of green sub-pixels G. The plurality of first electrodes 131 within the same isolation opening 120 are arranged adjacent to each other in the row direction or the column direction.

[0069] Figure 6 This is a partial enlarged view of the touch display panel provided in the fifth embodiment of the present application. Figure 6 and Figure 5 It can be seen that the difference is that Figure 5 In the touch display panel shown, a plurality of touch sub-portions 1451 are arranged at intervals around a plurality of first electrodes 131 in the same isolation opening 120 .

[0070] Figure 7 This is a schematic top view of the touch display panel provided in the sixth embodiment of the present application. Figure 7 Only one touch electrode is shown, for example, the first touch electrode 14 or the second touch electrode 15. Figure 2a For comparison, take the second touch electrode 15 as an example, Figure 7 and Figure 2a It can be seen that the difference is that, in this embodiment, the touch sub-section 1451 and the connecting sub-section 1452 in the main body 151 are alternately connected, that is, the main body 151 is composed of the touch sub-section 1451 and the connecting sub-section 1452 in series, and the touch sub-section 1451 and the connecting sub-section 1452 are alternately arranged.

[0071] In this embodiment, the touch sub-portion 1451 and the connecting sub-portion 1452 in the first touch electrode 14 can adopt the same structure as the main body 151. Specifically, the touch sub-portion 1451 and the connecting sub-portion 1452 in the first touch electrode 14 are alternately connected, that is, the first touch electrode 14 is composed of the touch sub-portion 1451 and the connecting sub-portion 1452 connected in series, and the touch sub-portion 1451 and the connecting sub-portion 1452 are alternately arranged.

[0072] The touch display panel provided in this embodiment can ensure that the number of connecting sub-parts 1452 is as small as possible, and the layout design is simpler.

[0073] Figure 8 This is a schematic diagram of the top view of the touch display panel provided in the seventh embodiment of the present application. Figure 8 and Figure 2c As can be seen from the touch display panel shown, the difference is that, in this embodiment, the touch display panel further includes a second insulating layer 17 filling the area between the isolation structure 12 and the bridge portion 152 .

[0074] In one embodiment, the touch display panel further includes an encapsulation structure 18. Specifically, the encapsulation structure 18 includes a first encapsulation layer, the first encapsulation layer includes a plurality of encapsulation portions 181, and the encapsulation portions 181 correspond one-to-one to the isolation openings 120. The encapsulation portion 181 covers the surface of the sub-pixel 13 facing away from the substrate 11 and extends to cover the edge of the isolation structure 12. The encapsulation structure 18 may further include a second encapsulation layer 182, located on the surface of the first encapsulation layer facing away from the substrate 11, the orthographic projection of the second encapsulation layer 182 on the substrate 11 at least covering the orthographic projections of the encapsulation portion 181 and the isolation structure 12 on the substrate 11. The encapsulation structure 18 may further include a third encapsulation layer 183, located on the surface of the second encapsulation layer 182 facing away from the substrate 11, the orthographic projection of the third encapsulation layer 183 on the substrate 11 covering the orthographic projection of the second encapsulation layer 182 on the substrate 11. Preferably, the materials of the first encapsulation layer and the third encapsulation layer 183 include inorganic materials, and the material of the second encapsulation layer 182 includes organic materials.

[0075] Figure 9 This is a schematic diagram of the top view of the touch display panel provided in the eighth embodiment of the present application. Figure 9 and Figure 8 As can be seen from the touch display panel shown, the difference is that, in this embodiment, no additional second insulating layer 17 is required, and the packaging portion 181 is used as the second insulating layer 17 .

[0076] Specifically, the touch display panel further includes an encapsulation structure 18. Encapsulation structure 18 comprises a first encapsulation layer, which includes a plurality of encapsulation portions 181. Encapsulation portions 181 correspond one-to-one with isolation openings 120. Encapsulation portions 181 cover the surface of sub-pixels 13 facing away from substrate 11 and extend to fill the area between isolation structure 12 and bridging portion 152.

[0077] The encapsulation structure 18 may further include a second encapsulation layer 182 located on the surface of the first encapsulation layer facing away from the substrate 11 . The orthographic projection of the second encapsulation layer 182 on the substrate 11 covers the orthographic projections of the encapsulation portion 181 and the isolation structure 12 on the substrate 11 .

[0078] The encapsulation structure 18 may further include a third encapsulation layer 183 located on a surface of the second encapsulation layer 182 facing away from the substrate 11 , and the orthographic projection of the third encapsulation layer 183 on the substrate 11 covers the orthographic projection of the second encapsulation layer 182 on the substrate 11 .

[0079] According to the touch display panel provided in this embodiment, the packaging portion 181 is used as the second insulating layer 17 , and no additional second insulating layer 17 is required, thereby simplifying the manufacturing process.

[0080] Figure 10 This is a schematic diagram of the top view of the touch display panel provided in the ninth embodiment of the present application. Figure 10 The difference between the touch display panel provided by any of the above embodiments is that the bridge portion 152 is located at a different position in the film layer.

[0081] Specifically, in this embodiment, the substrate 11 includes at least one metal layer, and the bridge portion 11 is located in any metal layer. In this case, the substrate 11 may be an array substrate. Generally, an array substrate includes multiple stacked metal layers, and the bridge portion 11 may be located in any metal layer of the array substrate.

[0082] In one embodiment, at least one metal layer includes at least one of a data signal line, a scan line, a reference voltage signal line, and a power signal line, that is, the bridge portion 11 and at least one of the data signal line, the scan line, the reference voltage signal line, and the power signal line are arranged on the same layer.

[0083] In one embodiment, the touch display panel may further include a microlens structure, a filter structure, a cover plate, etc. located on the side of the packaging structure 18 facing away from the substrate 11. For example, the filter structure is located between the microlens structure and the packaging structure 18. The filter structure may be a color filter layer.

[0084] The present application also provides another touch display panel, referring to the display panel provided in any of the above embodiments. The touch display panel includes: a substrate 11, a patterned conductive layer, a patterned structural layer, and a plurality of sub-pixels 13. Among them, the patterned conductive layer is located on one side of the substrate 11. The patterned conductive layer includes a plurality of first electrodes 121, and a first touch electrode 14 and a plurality of main parts 151 located between adjacent first electrodes 121. The patterned structural layer is located on the side of the patterned conductive layer away from the substrate 11. The patterned structural layer includes an isolation structure 12 and a bridging part 152. The orthographic projection of the isolation structure on the substrate 11 is at least located between the orthographic projections of adjacent first electrodes 121 on the substrate 11, and covers the edge area of ​​the orthographic projection of the first electrode 121. The isolation structure 12 encloses an isolation opening 120, and the isolation opening 120 exposes the first electrode 121. The isolation structure 12 includes a through hole, within which a bridge portion 152 is located. The bridge portion 152 connects to the adjacent main portion 151 via a conductive via. The orthographic projection of the bridge portion 152 on the substrate 11 intersects the orthographic projection of the first touch electrode 14 on the substrate 11. The sub-pixel 13 is at least partially located within the isolation opening 120.

[0085] The touch display panel provided according to this embodiment and the touch display panel provided in any of the above embodiments belong to the same inventive concept. For technical details not mentioned in the touch display panel embodiment, please refer to the above related embodiments and will not be repeated here.

[0086] The present application also provides a method for preparing a touch display panel. Figure 11 This is a flow chart of a method for manufacturing a touch display panel according to the first embodiment of the present application. Figure 11 As shown, the preparation method 1100 includes:

[0087] Step S1110, combining Figure 2a-2d , an isolation structure 12, a plurality of sub-pixels 13, a first touch electrode 14 and a second touch electrode 15 are prepared on a substrate 11 to obtain a touch display panel.

[0088] Among them, the isolation structure 12 encloses a plurality of isolation openings 120, and the sub-pixel 13 is at least partially located within the isolation opening 120. The sub-pixel 13 includes a stacked first electrode 131 and a second electrode 132, and the first electrode 131 is located on the side of the second electrode 132 close to the substrate 11; the second touch electrode 15 includes a plurality of main body portions 151 and a bridging portion 152 connecting adjacent main body portions 151; the first touch electrode 14 and the main body portion 151 are arranged on the same layer as the first electrode 131 and are located in the spacing area between adjacent first electrodes 131; the bridging portion 152 and the main body portion 151 are arranged on different layers, and the orthographic projection of the bridging portion 152 on the substrate 11 overlaps with the orthographic projection of the first touch electrode 14 on the substrate 11.

[0089] Figure 12 This is a flow chart of a method for manufacturing a touch display panel according to the second embodiment of the present application. Figure 12 As shown, in this embodiment, step S1110 includes:

[0090] Step S1111, combining Figure 2a-2d As shown, a patterned conductive layer is prepared on the substrate 11 to obtain a plurality of first electrodes 131 , and first touch electrodes 14 and a plurality of main bodies 152 located between adjacent first electrodes 131 .

[0091] Step S1112, combining Figure 2a-2d As shown, a patterned structural layer is prepared on the side of the patterned conductive layer facing away from the substrate 11. The patterned structural layer is located between adjacent first electrodes 131 and covers the first touch electrodes 14 and the main body 152. The patterned structural layer includes an isolation structure 12 and a bridging portion 152. The isolation structure 12 encloses a plurality of isolation openings 120. The isolation openings 120 at least partially expose the first electrodes 131. The bridging portion 152 connects adjacent main body portions 151.

[0092] In one embodiment, before step S1112 , the method further includes: preparing a first insulating layer 16 on the side of the patterned conductive layer facing away from the substrate 11 , wherein the first insulating layer 16 is located between adjacent first electrodes 131 , and the bridging portion 152 is connected to the adjacent main body portions 151 through a conductive via penetrating the first insulating layer 16 .

[0093] Step S1113, combining Figure 2a-2d As shown, at least one organic layer 133 and a second electrode 132 are sequentially prepared in the isolation opening 120 to obtain a touch display panel.

[0094] In one embodiment, the isolation structure 12 includes a through hole, and the bridge portion 152 is located in the through hole and is spaced apart from the isolation structure 12. In this case, the preparation method further includes performing the following steps after step S1113:

[0095] See Figure 8 , a second insulating layer 17 is prepared between the isolation structure 12 and the bridge portion 152 .

[0096] Figure 13 This is a flow chart of a method for manufacturing a touch display panel according to the third embodiment of the present application. Figure 13 and Figure 14 It can be seen that the difference is that the preparation method 1300 provided in this embodiment further includes the following steps performed after step S1113:

[0097] In step S131, a first encapsulation layer is prepared on the side of the second electrode 132 facing away from the substrate 11. The first encapsulation layer includes a plurality of encapsulation portions 181. The encapsulation portions 181 correspond one-to-one to the isolation openings 120. The encapsulation portions 181 cover the surface of the second electrode 132 facing away from the substrate 11 and extend to the spacing area between the isolation structure 12 and the bridging portion 152.

[0098] Step S132 : sequentially preparing a second encapsulation layer 182 and a third encapsulation layer 183 on a side of the first encapsulation layer facing away from the substrate 11 .

[0099] Figure 14 This is a schematic diagram of the structure of a display device provided in one embodiment of the present application. Figure 14 As shown, the display device includes the touch display panel 1400 provided in any of the above embodiments. The display device is a product with an image display function. For example, the display device can be used to display static images, such as pictures or photos. The display device can also be used to display dynamic images, such as videos.

[0100] The display device can be a laptop computer, a mobile phone, a handheld or portable computer, a camera, a camcorder, a vehicle-mounted smart central control screen, a calculator, a smart watch, a GPS navigator, an electronic photo, an electronic billboard or sign, a projector, etc.

[0101] The display device includes the display substrate provided by any of the above embodiments. The display substrate may be an organic light emitting diode display substrate or a quantum dot electroluminescent display substrate.

[0102] In addition, the display device can also have functions such as taking pictures, recording videos, fingerprint recognition, and face recognition. Accordingly, the display device also includes at least one functional module for realizing the above functions, such as an under-screen camera, an under-screen fingerprint recognition sensor, etc.

[0103] The basic principles of the present application have been described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, and effects mentioned in this application are merely illustrative and not restrictive, and it should not be assumed that these advantages, strengths, and effects are required of each embodiment of this application. In addition, the specific details disclosed above are merely illustrative and facilitating understanding, and are not restrictive. The above details do not limit this application to necessarily being implemented using the above specific details.

[0104] The above description has been provided for the purpose of illustration and description. Furthermore, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although a number of example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A touch display panel, characterized in that: include: substrate; an isolation structure, located on one side of the substrate, the isolation structure enclosing a plurality of isolation openings; a plurality of sub-pixels, each of the sub-pixels being at least partially located within the isolation opening, the sub-pixels comprising a first electrode and a second electrode stacked together, the first electrode being located on a side of the second electrode close to the substrate; as well as a first touch electrode and a second touch electrode, wherein the second touch electrode comprises a plurality of main bodies and a bridge portion connecting adjacent main bodies; the first touch electrode and the main body are disposed in the same layer as the first electrodes and are located in a spacing region between adjacent first electrodes; The bridge portion and the main body portion are provided in different layers, and an orthographic projection of the bridge portion on the substrate overlaps with an orthographic projection of the first touch electrode on the substrate.

2. The touch display panel according to claim 1, wherein: Either the first touch electrode or the main body includes a plurality of touch sub-portions connected as one body, wherein the touch sub-portions at least partially surround the first electrode; Preferably, one of the first electrodes is disposed in the isolation opening, and one of the touch sub-portions at least partially surrounds the first electrode; Preferably, one first electrode is provided in the isolation opening, and a plurality of touch sub-parts are arranged at intervals around the first electrode; Preferably, a plurality of the first electrodes are disposed in at least a portion of the isolation openings, and one of the touch sub-portions at least partially surrounds the plurality of the first electrodes in the same isolation opening; Preferably, a plurality of the first electrodes are disposed in at least a portion of the isolation openings, and a plurality of the touch sub-units are disposed at intervals around the plurality of the first electrodes in the same isolation opening.

3. The touch display panel according to claim 2, wherein: Either the first touch electrode or the main body is a mesh structure, and the touch sub-portion includes a grid surrounding the first electrode.

4. The touch display panel according to claim 2 or 3, wherein: Either the first touch electrode or the main body further includes a plurality of connecting sub-parts, and the plurality of touch sub-parts are connected into one body through the plurality of connecting sub-parts; Preferably, the touch sub-portions and the connecting sub-portions in the first touch electrodes are alternately connected; Preferably, the touch sub-section and the connection sub-section in the main body are alternately connected.

5. The touch display panel according to claim 1, wherein: The bridging portion and the isolation structure are arranged on the same layer; Preferably, the isolation structure includes a through hole, and the bridging portion is located in the through hole and spaced apart from the isolation structure; Preferably, the bridging portion and the isolation structure are insulated from each other.

6. The touch display panel according to claim 5, wherein: The touch display panel further includes a first insulating layer located at least between the isolation structure and the first touch electrode, and between the isolation structure and the main body; the orthographic projection of the first insulating layer on the substrate covers the spacing area between the orthographic projections of adjacent first electrodes on the substrate; Preferably, the bridge portion contacts the main body portion through a conductive via penetrating the first insulating layer; Preferably, the orthographic projection of the first insulating layer on the substrate also covers the edge area of ​​the first electrode; Preferably, the first insulating layer includes a pixel definition layer.

7. The touch display panel according to claim 6, wherein: The touch display panel further includes a second insulating layer, which fills a region between the isolation structure and the bridge portion.

8. The touch display panel according to claim 6, wherein: The touch display panel further includes a first encapsulation layer, wherein the first encapsulation layer includes a plurality of encapsulation parts, and the encapsulation parts fill the area between the isolation structure and the bridging part.

9. The touch display panel according to claim 1, wherein: The substrate includes at least one metal layer, and the bridge portion is located in any of the metal layers; Preferably, the at least one metal layer includes at least one of a data signal line, a scan line, a reference voltage signal line, and a power signal line.

10. The touch display panel according to claim 1, wherein: The isolation structure includes a first supporting portion and a first crown portion stacked together, wherein the first supporting portion is located on a side of the first crown portion close to the substrate, and an orthographic projection of the first supporting portion on the substrate is within the range of an orthographic projection of the first crown portion on the substrate; Preferably, the isolation structure further includes a first base located on a side of the first supporting portion close to the substrate, and the orthographic projection of the first supporting portion on the substrate is located within the orthographic projection range of the first base on the substrate.

11. The touch display panel according to claim 1, wherein: The bridge portion includes a second supporting portion and a second crown portion stacked together, the second supporting portion is located on a side of the second crown portion close to the base plate, and the orthographic projection of the second supporting portion on the base plate is within the orthographic projection range of the second crown portion on the base plate; Preferably, the bridging portion further includes a second base located on a side of the second supporting portion close to the substrate, and the orthographic projection of the second supporting portion on the substrate is located within the orthographic projection range of the second base on the substrate.

12. The touch display panel according to claim 1, wherein: The isolation structure includes a first supporting portion, the bridging portion includes a second supporting portion, and the first supporting portion and the second supporting portion are arranged on the same layer; Preferably, the isolation structure further comprises a first crown portion, located on a side of the first support portion facing away from the substrate; the bridging portion further comprises a second crown portion, located on a side of the second support portion facing away from the substrate; the first crown portion and the second crown portion are arranged on the same layer; Preferably, the isolation structure further includes a first base located on a side of the first supporting portion close to the substrate; the bridging portion further includes a second base located on a side of the second supporting portion close to the substrate; the first base and the second base are arranged on the same layer.

13. The touch display panel according to claim 1, wherein: The first encapsulation layer includes a plurality of encapsulation parts, the encapsulation parts correspond to the isolation openings one by one, and the encapsulation parts cover the surface of the sub-pixel facing away from the substrate; Preferably, the encapsulation portion extends to cover an edge of a surface of the isolation structure facing away from the substrate; Preferably, the isolation structure includes a through hole, the bridge portion is located in the through hole and is spaced apart from the isolation structure, and the encapsulation portion fills the area between the isolation structure and the bridge portion; Preferably, the touch display panel further comprises a second encapsulation layer, which is located on a side of the first encapsulation layer away from the substrate, and the orthographic projection of the second encapsulation layer on the substrate at least covers the orthographic projection of the isolation structure and each of the sub-pixels on the substrate; Preferably, the touch display panel further includes a third encapsulation layer located on a side of the second encapsulation layer away from the substrate. The materials of the first encapsulation layer and the third encapsulation layer include inorganic materials, and the material of the second encapsulation layer includes organic materials.

14. A touch display panel, characterized in that: include: substrate; a patterned conductive layer located on one side of the substrate; the patterned conductive layer includes a plurality of first electrodes, first touch electrodes located between adjacent first electrodes, and a plurality of main bodies; a patterned structural layer, located on a side of the patterned conductive layer facing away from the substrate; The patterned structural layer includes an isolation structure and a bridging portion; The orthographic projection of the isolation structure on the substrate is at least located between the orthographic projections of adjacent first electrodes on the substrate, and the isolation structure encloses an isolation opening, and the isolation opening exposes the first electrode; The isolation structure includes a through hole, the bridge portion is located in the through hole, the bridge portion is connected to the adjacent main body portion through a conductive via, and the orthographic projection of the bridge portion on the substrate intersects with the orthographic projection of the first touch electrode on the substrate; as well as A plurality of sub-pixels are provided, wherein the sub-pixels are at least partially located within the isolation opening.

15. A method for preparing a touch display panel, characterized in that: include: preparing an isolation structure, a plurality of sub-pixels, a first touch electrode and a second touch electrode on a substrate to obtain the touch display panel; The isolation structure encloses a plurality of isolation openings, the sub-pixels are at least partially located within the isolation openings, the sub-pixels include a stacked first electrode and a second electrode, the first electrode is located on a side of the second electrode closer to the substrate; the second touch electrode includes a plurality of main portions and a bridge portion connecting adjacent main portions; the first touch electrode and the main portion are disposed in the same layer as the first electrode and are located in a spacing region between adjacent first electrodes; The bridge portion and the main body portion are provided in different layers, and an orthographic projection of the bridge portion on the substrate overlaps with an orthographic projection of the first touch electrode on the substrate.

16. The preparation method according to claim 15, characterized in that The step of preparing an isolation structure, a plurality of sub-pixels, a first touch electrode and a second touch electrode on a substrate to obtain the touch display panel includes: A patterned conductive layer is formed on the substrate to obtain a plurality of first electrodes, first touch electrodes and a plurality of main bodies located between adjacent first electrodes; A patterned structural layer is formed on a side of the patterned conductive layer facing away from the substrate. The patterned structural layer is located between adjacent first electrodes and covers the first touch electrodes and the main body. The patterned structural layer includes an isolation structure and a bridging portion. The isolation structure encloses a plurality of isolation openings, the isolation openings at least partially expose the first electrodes, and the bridging portion connects adjacent main bodies. At least one organic layer and a second electrode are sequentially prepared in the isolation opening to obtain the touch display panel.

17. The preparation method according to claim 16, characterized in that Before forming the patterned structural layer on the side of the patterned conductive layer facing away from the substrate, the method further includes: A first insulating layer is prepared on a side of the patterned conductive layer facing away from the substrate. The first insulating layer is located between adjacent first electrodes. The bridge portion is connected to adjacent main portions through a conductive via penetrating the first insulating layer.

18. The preparation method according to claim 15 or 16, characterized in that: The isolation structure includes a through hole, the bridging portion is located in the through hole and is spaced apart from the isolation structure; the preparation method further includes: A second insulating layer is formed between the isolation structure and the bridge portion.

19. The preparation method according to claim 15, characterized in that The isolation structure includes a through hole, the bridging portion is located in the through hole and is spaced apart from the isolation structure; the preparation method further includes: A first encapsulation layer is formed on a side of the second electrode facing away from the substrate, wherein the first encapsulation layer includes a plurality of encapsulation portions, each of the encapsulation portions corresponding to the isolation openings, and each of the encapsulation portions covers a surface of the second electrode facing away from the substrate and extends to a region between the isolation structure and the bridging portion; The preparation method further comprises: A second encapsulation layer and a third encapsulation layer are sequentially prepared on a side of the first encapsulation layer facing away from the substrate.

20. A display device, characterized in that: The touch display panel comprises the touch display panel according to any one of claims 1 to 14.

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