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, a touch electrode blocks sub-pixel emergent light 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 located in the isolation openings; any one of the first touch electrode and the second touch electrode comprises a plurality of touch parts and a plurality of connecting parts which are connected with each other; the touch control parts are located in the isolation openings, in the same isolation opening, at least one touch control part partially surrounds the isolation opening, and the connecting parts are connected with the touch control parts in different isolation openings.

Description

Technical Field

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

[0002] As the resolution of display products continues to increase, the spacing between adjacent sub-pixels is gradually compressed. In this case, the width of the touch electrode overlapping the spacing is mismatched with the width of the spacing, causing the touch electrode to block the light from the sub-pixel, affecting the display. Summary of the invention

[0003] In view of this, the embodiments of the present application provide a touch display panel and a method for manufacturing the same, and a display device, which solve the problem in the prior art that the touch electrode blocks the light output of the sub-pixel.

[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 located in the isolation openings; and a first touch electrode and a second touch electrode, either of the first touch electrode and the second touch electrode comprising a plurality of touch portions and a plurality of connecting portions connected to each other; the touch portions being located in the isolation openings, and in the same isolation opening, at least one touch portion being partially arranged around the isolation opening, and the connecting portions connecting touch portions in different isolation openings.

[0005] In combination with the first aspect, in some possible implementations, the sub-pixel includes a first electrode, and the first electrode and the touch control part are arranged in the same layer; preferably, the sub-pixel also includes a second electrode stacked on a side of the first electrode close to the substrate.

[0006] In combination with the first aspect, in some possible implementations, a first electrode is arranged in the same isolation opening, at least one touch portion partially surrounds the first electrode, and the portion of the first electrode not surrounded by the touch portion overlaps with the isolation structure; preferably, the isolation structure includes a stacked support portion and a crown portion, the support portion is located on a side of the crown portion close to the substrate, the orthographic projection of the support portion on the substrate is located within the orthographic projection range of the crown portion on the substrate, and the portion of the first electrode not surrounded by the touch portion overlaps with the support portion; preferably, the isolation opening includes a straight edge, and the first electrode overlaps with at least part of the straight edge.

[0007] In combination with the first aspect, in some possible implementations, a plurality of touch portions are arranged in at least a portion of the isolation openings, and the plurality of touch portions are arranged at intervals around the isolation openings; preferably, the plurality of touch portions in the same isolation opening include a first touch portion and a second touch portion, and the first touch portion and the second touch portion are respectively located on opposite sides of the sub-pixel.

[0008] In combination with the first aspect, in some possible implementations, multiple sub-pixels are arranged in at least part of the isolation openings, and the multiple sub-pixels share the same first electrode; preferably, the multiple sub-pixels in the same isolation opening have the same luminous color; preferably, the multiple sub-pixels are arranged in an array, and the multiple sub-pixels in the same isolation opening include a first sub-pixel and a second sub-pixel, and the first sub-pixel and the second sub-pixel are adjacent in the row direction or adjacent in the column direction; preferably, multiple sub-pixels are arranged in part of the isolation openings, and the remaining isolation openings and sub-pixels correspond one-to-one.

[0009] In combination with the first aspect, in some possible implementations, the orthographic projection of the connecting portion of the first touch electrode on the substrate and the orthographic projection of the connecting portion of the second touch electrode on the substrate intersect; the connecting portion in the first touch electrode includes a first connecting portion, the first connecting portion includes a first sub-portion, a second sub-portion and a third sub-portion connected in sequence, the orthographic projection of the second sub-portion on the substrate and the orthographic projection of part of the connecting portion of the second touch electrode on the substrate intersect; preferably, the second sub-portion and the isolation structure are arranged in the same layer; preferably, the first sub-portion, the third sub-portion and the connecting portion of the second touch electrode are arranged in the same layer; preferably, the connecting portion in the first touch electrode also includes a second connecting portion, the second connecting portion and the connecting portion of the second touch electrode are arranged in the same layer; preferably, the connecting portion of the second touch electrode is overlapped on the side of the isolation structure facing away from the substrate.

[0010] In combination with the first aspect, in some possible implementations, the connecting portion of the second touch electrode is located on the side of the isolation structure facing away from the substrate; preferably, the connecting portion in the first touch electrode includes the second connecting portion, and the connecting portion of the second touch electrode and the second connecting portion of the first touch electrode are arranged in the same layer.

[0011] In combination with the first aspect, in some possible implementations, multiple connection parts and multiple touch parts of at least one of the first touch electrode and the second touch electrode are alternately connected; preferably, virtual extension lines connecting two connection parts of the same touch part are vertical or collinear.

[0012] In combination with the first aspect, in some possible implementations, the touch display panel further includes an insulating layer located between the first electrode and the touch portion, and between the touch portion and the isolation structure; preferably, the insulating layer includes a first inorganic encapsulation layer.

[0013] In combination with the first aspect, in some possible implementations, the touch display panel also includes a packaging structure, which is located on the side of the sub-pixel and the isolation structure away from the substrate, and at least part of the connecting portion is located in the packaging structure; preferably, the packaging structure includes a stacked first inorganic packaging layer and an organic packaging layer, the first inorganic packaging layer is located on the side of the organic packaging layer close to the substrate, and at least part of the connecting portion is located between the first inorganic packaging layer and the organic packaging layer; preferably, the packaging structure includes a first inorganic packaging layer, the first inorganic packaging layer includes a plurality of inorganic packaging parts, the inorganic packaging parts correspond to the isolation openings one by one, the inorganic packaging parts cover the surface of the sub-pixel and the touch part away from the substrate, and extend to cover the edge of the isolation structure; at least part of the connecting portion is located on the side of the isolation structure away from the substrate, and is connected to the touch part through a conductive via that penetrates the inorganic packaging part; preferably, the connecting portion in the first touch electrode includes a first connecting portion, the first connecting portion includes a first sub-portion, a second sub-portion and a third sub-portion connected in sequence, and the connecting portions of the first sub-portion, the third sub-portion and the second touch electrode are all located in the packaging structure.

[0014] In combination with the first aspect, in some possible implementations, the isolation structure includes a stacked support portion and a crown portion, the crown portion is located on the side of the support portion facing away from the substrate, and the orthographic projection of the support portion on the substrate is located within the range of the orthographic projection of the crown portion on the substrate; preferably, the sub-pixel includes a first electrode, and the first electrode and the support portion are overlapped.

[0015] The second aspect of the present application provides a method for preparing a touch display panel, 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 an isolation opening, and the sub-pixels are located in the isolation opening; either the first touch electrode or the second touch electrode comprises a plurality of touch portions and a plurality of connecting portions connected as one; the touch portion is located in the isolation opening, and in the same isolation opening, at least one touch portion is partially arranged around the isolation opening.

[0016] In combination with the second aspect, in some possible implementations, preparing an isolation structure, a plurality of sub-pixels, a first touch electrode and a second touch electrode on a substrate includes: preparing a plurality of second electrodes arranged at intervals on the substrate; preparing an isolation structure and a second sub-portion between adjacent second electrodes, the isolation structure enclosing a plurality of isolation openings, the isolation openings including at least a portion of the second electrodes; the isolation structure and the second sub-portion being arranged on the same layer; preparing at least one organic layer and a first patterned conductive layer in the isolation openings in sequence, the first patterned conductive layer including a first electrode and a touch portion located in the isolation openings, and in the same isolation opening, at least one touch portion partially surrounds the first electrode, and a portion of the first electrode not surrounded by the touch portion overlaps the support portion; and preparing a second patterned conductive layer on a side of the isolation structure facing away from the substrate, the second patterned conductive layer including a first sub-portion, a third sub-portion and a connecting portion, the touch portions in different isolation openings being connected through the first sub-portion, the second sub-portion and the third sub-portion as a whole, or connected through the connecting portion, to obtain cross-arranged first touch electrodes and second touch electrodes.

[0017] In combination with the second aspect, in some possible implementations, the preparation method further includes: preparing an insulating layer between the first electrode and the touch portion, and between the touch portion and the isolation structure.

[0018] A third aspect of the present application provides a display device, comprising the touch display panel provided by any of the above embodiments.

[0019] According to the touch display panel and its preparation method and display device provided by the embodiment of the present application, the touch display panel includes: a substrate; an isolation structure located on one side of the substrate, the isolation structure encloses a plurality of isolation openings; a plurality of sub-pixels, the sub-pixels are located in the isolation openings; and a first touch electrode and a second touch electrode, any of the first touch electrode and the second touch electrode includes a plurality of touch parts and a plurality of connecting parts connected as one; the touch part is located in the isolation opening, and in the same isolation opening, at least one touch part is partially arranged around the isolation opening, and the connecting part connects the touch parts in different isolation openings. In this way, by arranging the touch part in the isolation opening, the touch part is prevented from blocking the light output of the sub-pixel, thereby improving the display effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1a It is a schematic diagram of a partial top view structure of a touch display panel in the related art.

[0021] Figure 1b for Figure 1a A partial enlarged view of the touch display panel shown.

[0022] Figure 1c for Figure 1a A schematic diagram of the cross-sectional structure of a touch display panel is shown.

[0023] Figure 2a This is a schematic diagram of the top structure of the touch display panel provided in the first embodiment of the present application.

[0024] Figure 2b for Figure 2a A partial enlarged view of the touch display panel shown.

[0025] Figure 2c for Figure 2b The local enlarged view shown is a schematic diagram of the cross-sectional structure along the B1B2 line.

[0026] Figure 2d for Figure 2b The local enlarged view shown is a schematic diagram of the cross-sectional structure along the C1C2 line.

[0027] Figure 3 This is a schematic diagram of the top structure of a touch display panel provided in the second embodiment of the present application.

[0028] Figure 4 This is a partial enlarged view of the touch display panel provided in the third embodiment of the present application.

[0029] Figure 5 This is a partial enlarged view of the touch display panel provided in the fourth embodiment of the present application.

[0030] Figure 6 This is a schematic cross-sectional structure diagram of a touch display panel provided in the fifth embodiment of the present application.

[0031] Figure 7 This is a schematic cross-sectional structure diagram of a touch display panel provided in the sixth embodiment of the present application.

[0032] Figure 8 A flow chart of a method for preparing a touch display panel provided in one embodiment of the present application.

[0033] Fig. 9 This is a flow chart of a method for preparing a touch display panel provided in the second embodiment of the present application.

[0034] Fig.10 A schematic diagram of the structure of a display device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0035] As mentioned in the background art, as the resolution of display products increases, the touch electrodes may block the light emitted by sub-pixels.

[0036] Specifically, Figure 1a It is a schematic diagram of a partial top view structure of a touch display panel in the related art. Figure 1b for Figure 1a A partial enlarged view of the touch display panel is shown. Figure 1aIn the conventional touch display panel, a first touch electrode 1401 and a second touch electrode 1402 are integrated and arranged crosswise to realize the touch function. Figure 1a and Figure 1b As shown, either the first touch electrode 1401 or the second touch electrode 1402 includes a mesh touch metal wire, which is arranged in the spacing area between adjacent sub-pixels. A sub-pixel 13 is arranged in each mesh hole, and the spacing D between adjacent sub-pixel openings is about 22 microns. In this case, the touch metal wire can be arranged in the center of the spacing area, such as Figure 1b However, as the resolution increases, the interval D is gradually compressed, causing the touch metal line to block the light from the sub-pixel, affecting the display.

[0037] at the same time, Figure 1c for Figure 1a A schematic diagram of the cross-sectional structure of a touch display panel is shown. Figure 1c The cross-sectional structure shown corresponds to Figure 1a Section line A1A2 in. Combined Figure 1a and Figure 1c As shown, the first touch electrode 1401 and the second touch electrode 1402 are usually arranged outside the display panel. In this case, on the one hand, the preparation process of the first touch electrode 1401 and the second touch electrode 1402 requires multiple use of mask plates, and alignment errors are easily introduced during the mask alignment process; on the other hand, the first touch electrode 1401 and the second touch electrode 1402 are arranged outside the display panel, which will increase the overall thickness of the touch display panel, which is not conducive to the thinning of the product.

[0038] In view of this, the present application provides a touch display panel and a method for manufacturing the same, and a display device, which prevents the light from the sub-pixel from being blocked by the touch metal wire by setting at least part of the touch metal wire in the sub-pixel opening, thereby improving the transmittance and reducing the degree of color deviation at large viewing angles. In a further embodiment, the first touch electrode and the second touch electrode are all integrated inside the display panel, and at least part of the touch structure is synchronously manufactured with certain film layers of the display panel, so that the touch display panel is thinner, and the manufacturing process can omit multiple mask alignment processes, thereby simplifying the process.

[0039] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0040] In the accompanying drawings, the sizes of layers and regions may be exaggerated for clarity of illustration. It is understood that when a structure is referred to as being "on or under" another structure, the structure may be directly on or under the other structure, or there may be intermediate structures. The same reference numerals always indicate the same structure. The structures mentioned herein include any of a film layer, an element, a device, a component, and an assembly.

[0041] When a structure is referred to as being “connected” to another structure, the structure may be directly connected to the other structure or indirectly connected to the other structure with one or more intermediate structures interposed therebetween.

[0042] Figure 2a This is a schematic diagram of the top structure 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 2b The local enlarged view shown is a schematic diagram of the cross-sectional structure along the B1B2 line. Figure 2d for Figure 2b The partial enlarged view shown is a schematic diagram of the cross-sectional structure along the C1C2 line. 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 1401 and a second touch electrode 1402. It should be noted that, in order to make the illustration clearer, Figure 2a The isolation structure 12 is not shown.

[0043] 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, ultra-thin glass, etc.

[0044] The isolation structure 12 is located on one side of the substrate 11, and the isolation structure 12 encloses a plurality of isolation openings 120. The isolation structure 12 has a partitioning function. Specifically, the isolation structure 12 includes a support portion 121 and a crown portion 122, wherein the support portion 121 is located on the side of the crown portion 122 close to the substrate 11, and the orthographic projection of the support portion 121 on the substrate 11 is located within the orthographic projection range of the crown portion 122 on the substrate 11. The material of the crown portion 122 may be an inorganic material, an organic material, or a metal material. In the case where the crown portion 122 is a metal material, the material of the crown portion 122 may be titanium. The support portion 121 may be designed as an independent film layer, that is, there is no physical interface inside the support portion 121, and each part is composed of the same material. Alternatively, the support portion 121 may be designed to be composed of at least two film layers stacked together. For example, the support portion 121 is formed by stacking two conductive film layers. The materials of the two conductive film layers may 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.

[0045] In other embodiments, the support portion 121 includes a first support sub-portion and a second support sub-portion stacked together, the first support sub-portion is located on a side of the second support sub-portion away from the substrate 11, and the orthographic projection of the first support sub-portion on the substrate 11 is located within the orthographic projection range of the second support sub-portion on the substrate 11. Exemplarily, the material of the first support sub-portion is aluminum, and the material of the second support sub-portion is molybdenum.

[0046] The composition, preparation and other contents of the isolation structure (also called partition structure) 12 are disclosed in patents CN118251982A, 202410864269.8, patent PCT / CN2024 / 098407, patent PCT / CN2024 / 102783, patent PCT / CN2024 / 098217, patent PCT / CN2024 / 099419, patent PCT / CN2024 / 099072, patent CN117979755A, patent CN117998900A, patent CN117062489A, and patent CN11

[0047] 7580403A, patent CN116583155A, patent CN116669477A, ​​patent CN117396039A, patent CN116669480A, patent CN116600606A, and patent CN117500332A, the contents of which are incorporated into this application by reference for reference.

[0048] The sub-pixel 13 is located in the isolation opening 120, and one or more sub-pixels 13 may be arranged 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 plurality of sub-pixels 13 may include sub-pixels of multiple colors, such as multiple red sub-pixels, green sub-pixels, and blue sub-pixels. The sub-pixel 13 includes a first electrode 131 and a second electrode 132 stacked together, and at least one organic layer 133 located between the first electrode 131 and the second electrode 132, wherein the first electrode 131 is located on the side of the second electrode 132 away from 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. The at least one organic layer includes a light-emitting layer, and may also include at least one of an electron injection layer, an electron transport layer, and a hole blocking layer located between the first electrode 131 and the light-emitting layer, and at least one of a hole injection layer, a hole transport layer, and an electron blocking layer located between the second electrode 132 and the light-emitting layer.

[0049] Either the first touch electrode 1401 or the second touch electrode 1402 includes a plurality of touch portions 141 and a plurality of connecting portions 142 connected to each other. The touch portion 141 is located in the isolation opening 120. One or more touch portions 141 may be provided in the same isolation opening 120. In the same isolation opening 120, at least one touch portion 141 is partially provided around the isolation opening 120, and the touch portion 141 is located between the isolation structure 12 and the sub-pixel 13. The connecting portion 142 connects the touch portions 141 in different isolation openings 120, and is used to connect all the touch portions 141 in the same touch electrode, including the first touch electrode 1401 or the second touch electrode 1402, as one. The same touch portion 141 may be connected to one or more connecting portions 142. In this embodiment, the position of the film layer where the connecting portion 142 is located in the thickness direction of the touch display panel is not limited.

[0050] According to the touch display panel provided in this embodiment, by disposing the touch portion 141 in the isolation opening 120 , it is avoided that the touch portion 141 blocks the light emitted by the sub-pixel, thereby improving the display effect.

[0051] In one embodiment, see Figure 2c The first electrode 131 and the touch portion 141 are disposed in the same layer, that is, the first electrode 131 and the touch portion 141 are made of the same material and are obtained by patterning the same material layer. In this way, a patterning process can be omitted, simplifying the manufacturing process.

[0052] In one embodiment, a first electrode 131 is disposed in the same isolation opening 120, and at least one touch portion 141 partially surrounds the first electrode 131. Figure 2a and Figure 2d As shown, a touch portion 141 is provided in the same isolation opening 120, and the touch portion 141 partially surrounds the first electrode 131. The portion of the first electrode 131 not surrounded by the touch portion 141 overlaps with the isolation structure 12. Exemplarily, the portion of the first electrode 131 not surrounded by the touch portion 141 overlaps with the support portion 121. Exemplarily, the isolation opening 120 includes a straight edge, and the first electrode 131 overlaps with at least part of the straight edge. Specifically, the shape of the isolation opening 120 can be a regular shape, such as a polygon, a circle, an ellipse, etc., or an irregular shape. Whether it is a regular shape or an irregular shape, the edge of the isolation opening 120 can include a straight edge, and the first electrode 131 overlaps with the straight edge. The advantage of this is that compared with a curved edge or a sharp edge, the overlap effect with the straight edge is better and the reliability is higher.

[0053] In one embodiment, in combination Figure 2a and Figure 2bAs shown, the orthographic projection of a portion of the connecting portion 142 of the first touch electrode 1401 on the substrate 11 intersects with the orthographic projection of a portion of the connecting portion 142 of the second touch electrode 1402 on the substrate 11 .

[0054] Exemplarily, the connecting portion 142 in the first touch electrode 1401 includes a first connecting portion 1421, and the first connecting portion 1421 includes a first sub-portion ab, a second sub-portion bc and a third sub-portion cd which are connected in sequence, and the orthographic projection of the second sub-portion bc on the substrate 11 and the orthographic projection of a part of the connecting portion 142 of the second touch electrode 1402 on the substrate 11 intersect, that is, the intersection of the first touch electrode 1401 and the second touch electrode 1402 is achieved by the intersection between the second sub-portion bc and the connecting portion 142 of the second touch electrode 1402.

[0055] In order to achieve the intersection between the second sub-portion bc and the connecting portion 142 of the second touch electrode 1402, it is necessary to set the second sub-portion bc and the connecting portion 142 of the second touch electrode 1402 to be located in different film layers. Exemplarily, the second sub-portion bc and the isolation structure 12 are arranged in the same layer, and the connecting portion 142 of the second touch electrode 1402 is superimposed on the side of the isolation structure 12 away from the substrate 11. In this case, the isolation structure 12 is a mesh structure, and the network connection line of the mesh structure includes a notch, and the second sub-portion bc is located at the notch and is spaced apart from the isolation structure 12.

[0056] In one embodiment, the first sub-portion ab, the third sub-portion cd and the connecting portion 142 of the second touch electrode 1402 are arranged in the same layer. For example, the first sub-portion ab, the third sub-portion cd and the connecting portion 142 of the second touch electrode 1402 are all arranged on the side of the isolation structure 12 away from the substrate 11.

[0057] In one embodiment, the connection portion 142 in the first touch electrode 1401 further includes a second connection portion 1422 , and the second connection portion 1422 and the connection portion 142 of the second touch electrode 1402 are disposed in the same layer.

[0058] It should be noted that in Figure 2a-2d In the touch display panel shown, the connection part 142 is arranged in two film layers, wherein the second sub-portion bc of the first connection part 1421 of the first touch electrode 1401 is arranged in the same layer as the isolation structure 12; the remaining connection parts, including the first sub-portion ab and the third sub-portion cd of the first connection part 1421 of the first touch electrode 1401, the second connection part 1422 of the first touch electrode 1401, and the connection part 142 of the second touch electrode 1402 are arranged in the same layer, for example, arranged on the side of the isolation structure 12 away from the substrate 11. It should be understood that the film layer positions of the connection parts given here are only exemplary, as long as the insulation between the second sub-portion bc and the connection part 142 of the second touch electrode 1402 is ensured.

[0059] The connecting portion 142 and the isolation structure 12 are insulated. In one embodiment, the material of the crown 122 of the isolation structure 12 is an insulating material. In another embodiment, an insulating portion is provided between the connecting portion 142 and the isolation structure 12, and the insulating portion may be, for example, a partial encapsulation layer, that is, the encapsulation layer has the function of insulating the connecting portion 142 and the isolation structure 12.

[0060] Figure 3 This is a schematic diagram of the top structure of a touch display panel provided in the second embodiment of the present application. Figure 3 Only one touch electrode is shown, taking the first touch electrode 1401 as an example. Figure 3 and Figure 2a It can be seen from the touch display panel shown that the difference between the two is that, in this embodiment, the multiple connecting parts 142 and the multiple touch parts 141 of at least one of the first touch electrode 1401 and the second touch electrode 1402 are alternately connected. In this case, for any touch electrode, such as the first touch electrode 1401 or the second touch electrode 1402, the touch parts 141 and the connecting parts 142 in the touch electrode are connected in sequence. Among them, the first touch part and the last touch part are each connected to a connecting part 142, and any touch part other than the first touch part and the last touch part is connected to two connecting parts, and the other ends of the two connecting parts are respectively connected to the previous touch part and the next touch part.

[0061] In one embodiment, virtual extension lines of two connection portions 142 connecting the same touch portion 141 are vertical or collinear.

[0062] According to the touch display panel provided in this embodiment, it can be ensured that the number of the connecting parts 142 is as small as possible, and the layout design is simpler.

[0063] 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 2a , Figure 3 It can be seen from the touch display panel shown that the difference is that, in this embodiment, a plurality of sub-pixels 13 are disposed in at least a portion of the isolation openings 120 , and the plurality of sub-pixels 13 share the same first electrode 131 .

[0064] In one embodiment, the light-emitting colors of the multiple sub-pixels in the same isolation opening 120 are the same. Exemplarily, a plurality of sub-pixels 13 are disposed in a portion of the isolation openings 120, and the plurality of sub-pixels in the portion of the isolation openings 120 are green sub-pixels G; the other isolation openings 120 correspond to the sub-pixels 13 one by one, and the sub-pixels in the other isolation openings 120 are blue sub-pixels B or red sub-pixels R. Since the opening area of ​​the green sub-pixel G is the smallest, placing the plurality of green sub-pixels G in the same isolation opening 120 can better improve the overlap reliability of the first electrode 131 and the isolation structure 12 compared to placing the sub-pixels of other colors in the same isolation opening 120.

[0065] In one embodiment, the plurality of sub-pixels 13 are arranged in an array, and the plurality of sub-pixels in the same isolation opening 120 include a first sub-pixel 1301 and a second sub-pixel 1302 , and the first sub-pixel 1301 and the second sub-pixel 1302 are adjacent in a row direction or a column direction.

[0066] 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 2a , Figure 3 , Figure 4 It can be seen from the touch display panel shown that the difference is that, in this embodiment, a plurality of touch portions 141 are disposed in the same isolation opening 120 , and the plurality of touch portions 141 are disposed around the isolation opening 120 at intervals.

[0067] For example, Figure 5 As shown, the plurality of touch portions 141 disposed in the same isolation opening 120 include a first touch portion 1411 and a second touch portion 1412 . The first touch portion 1411 and the second touch portion 1412 are respectively located at two opposite sides of the sub-pixel 13 .

[0068] Figure 6 FIG. 5 is a schematic diagram of a cross-sectional structure of a touch display panel provided in the fifth embodiment of the present application. Figure 2c The touch display panel shown in the figure further includes an insulating layer 15 located between the first electrode 131 and the touch portion 141, and between the touch portion 141 and the isolation structure 12. The insulating layer 15 can be an additional film layer, or can be implemented using an existing film layer of the touch display panel, such as a first inorganic encapsulation layer.

[0069] In one embodiment, the touch display panel may further include an encapsulation structure 16, the encapsulation structure 16 includes a first inorganic encapsulation layer, the first inorganic encapsulation layer includes a plurality of inorganic encapsulation parts 161, and the inorganic encapsulation parts 161 correspond to the isolation openings 120 one by one. The inorganic encapsulation parts 161 cover the surface of the sub-pixel 13 and the touch part 141 away from the substrate 11, and fill the gap between the first electrode 131 and the touch part 141, and the gap between the touch part 141 and the isolation structure 12. In this case, combined with Figure 2b The first sub-portion ab and the third sub-portion cd in the first connecting portion 1421 of the first touch electrode 1401, the second connecting portion 1422 of the first touch electrode 1401, and any one of the connecting portion 142 of the second touch electrode 1402 are stacked on the side of the isolation structure 12 away from the substrate 11, and are connected to the touch portion 141 through a conductive via that penetrates the inorganic packaging portion 161.

[0070] The encapsulation structure 16 may further include an organic encapsulation layer 162 and a second inorganic encapsulation layer 163. The organic encapsulation layer 162 is stacked on the surface of the first inorganic encapsulation layer away from the substrate 11. The organic encapsulation layer 162 is a complete film layer structure, that is, a film layer that has not been patterned. The orthographic projection of the organic encapsulation layer 162 on the substrate 11 covers the orthographic projections of the isolation structure 12 and the inorganic encapsulation portion 161 on the substrate 11. The second inorganic encapsulation layer 163 is stacked on the surface of the organic encapsulation layer 162 away from the substrate 11. The orthographic projection of the second inorganic encapsulation layer 163 on the substrate 11 covers the orthographic projection of the organic encapsulation layer 162 on the substrate 11.

[0071] Figure 7 The cross-sectional structure diagram of the touch display panel provided in the sixth embodiment of the present application is shown in FIG. The difference between the touch display panel provided in this embodiment and the touch display panel provided in any of the above embodiments is that, in this embodiment, the touch display panel further includes a packaging structure 16, which is stacked on the side of the isolation structure 12 and the sub-pixel 13 away from the substrate 11, and at least part of the connecting portion 142 is located in the packaging structure 16.

[0072] For example, the encapsulation structure 16 includes a first inorganic encapsulation layer and an organic encapsulation layer 162, the first inorganic encapsulation layer is located on the side of the organic encapsulation layer 162 close to the substrate 11, and at least part of the connecting portion 142 is located between the first inorganic encapsulation layer and the organic encapsulation layer 162. Specifically, the first inorganic encapsulation layer includes a plurality of inorganic encapsulation portions 161, and the inorganic encapsulation portions 161 correspond to the isolation openings 120 one by one. The inorganic encapsulation portion 161 covers the surface of the sub-pixel 13 and the touch portion 141 facing away from the substrate 11, and fills the gap between the first electrode 131 and the touch portion 141, and the gap between the touch portion 141 and the isolation structure 12. The inorganic encapsulation portion 161 may further extend to cover the edge area of ​​the isolation structure 12. In combination Figure 2bThe first sub-portion ab and the third sub-portion cd in the first connecting portion 1421 of the first touch electrode 1401, the second connecting portion 1422 of the first touch electrode 1401, and any one of the connecting portion 142 of the second touch electrode 1402 are stacked on the isolation structure 12 and the inorganic packaging portion 161 away from the substrate 11, and are connected to the touch portion 141 through a conductive via that penetrates the inorganic packaging portion 161.

[0073] The encapsulation structure 16 may further include an organic encapsulation layer 162 and a second inorganic encapsulation layer 163. The organic encapsulation layer 162 is stacked on the surface of the first inorganic encapsulation layer away from the substrate 11. The organic encapsulation layer 162 is a complete film layer structure, that is, a film layer that has not been patterned. The orthographic projection of the organic encapsulation layer 162 on the substrate 11 covers the orthographic projections of the isolation structure 12 and the inorganic encapsulation portion 161 on the substrate 11. The second inorganic encapsulation layer 163 is stacked on the surface of the organic encapsulation layer 162 away from the substrate 11. The orthographic projection of the second inorganic encapsulation layer 163 on the substrate 11 covers the orthographic projection of the organic encapsulation layer 162 on the substrate 11.

[0074] In one embodiment, the first sub-portion ab and the third sub-portion cd in the first connecting portion 1421 of the first touch electrode 1401 , the second connecting portion 1422 of the first touch electrode 1401 , and the connecting portion 142 of the second touch electrode 1402 are all located in the packaging structure 16 .

[0075] According to the touch display panel provided in this embodiment, the first touch electrode 1401 and the second touch electrode 1402 are completely integrated inside the display panel, and the touch portion 141 can be on the same layer as the first electrode 131, the second sub-portion bc in the connecting portion 142 of the first touch electrode 1401 can be on the same layer as the isolation structure 12, and the insulation between the first touch electrode 1401 and the second touch electrode 1402 can be achieved by using the first inorganic encapsulation layer. Therefore, compared with the touch display panel in the related art, the preparation process of the touch display panel can omit multiple mask alignment processes, and at the same time make the product thinner and better adaptable to the currently popular sliding screen and curling screen.

[0076] The present application also provides a method for preparing a touch display panel. Figure 8 Flow chart of a method for preparing a touch display panel provided in one embodiment of the present application. Figure 8 As shown, the preparation method 800 includes:

[0077] Step S810, see Figure 2a-2d , an isolation structure 12, a plurality of sub-pixels 13, a first touch electrode 1401 and a second touch electrode 1402 are prepared on a substrate 11 to obtain a touch display panel.

[0078] The isolation structure 12 encloses an isolation opening 120, and the sub-pixel 13 is located in the isolation opening 120. Any one of the first touch electrode 1401 and the second touch electrode 1402 includes a plurality of touch portions 141 and a plurality of connecting portions 142 connected as one body; the touch portion 141 is located in the isolation opening 120, and in the same isolation opening 120, at least one touch portion 141 is partially disposed around the isolation opening 120.

[0079] According to the method for manufacturing a touch display panel provided in this embodiment, by disposing the touch portion 141 in the isolation opening 120 , the touch portion 141 is prevented from blocking the light emitted by the sub-pixel, thereby improving the display effect.

[0080] Fig. 9 This is a flow chart of a method for preparing a touch display panel provided in the second embodiment of the present application. In this embodiment, step S810 is specifically performed as follows:

[0081] Step S910, see Figure 2a-2d , a plurality of second electrodes 132 spaced apart are prepared on the substrate 11 .

[0082] Step S920 , preparing an isolation structure 12 and a second sub-portion bc between adjacent second electrodes 132 , wherein the isolation structure 12 encloses a plurality of isolation openings 120 , and the isolation openings 120 include at least a portion of the second electrode 132 ; the isolation structure 12 and the second sub-portion bc are disposed in the same layer.

[0083] Specifically, an isolation material layer is prepared on one side of the substrate 11, and the isolation material layer may be a multi-material composite film layer; the isolation material layer is patterned to obtain the isolation structure 12 and the second sub-portion bc.

[0084] Step S930, prepare at least one organic layer 133 and a first patterned conductive layer in the isolation opening 120 in sequence, the first patterned conductive layer includes a first electrode 131 and a touch portion 141 located in the isolation opening 120, and in the same isolation opening 120, at least one touch portion 141 partially surrounds the first electrode 131, and the portion of the first electrode 131 not surrounded by the touch portion 141 overlaps the support portion 121.

[0085] Specifically, at least one organic material layer is prepared as a whole layer, and the organic material layer is disconnected at the isolation structure 12 to obtain at least one organic layer 133 located in the isolation opening 120; a conductive material layer is prepared as a whole layer, and the conductive material layer is disconnected at the isolation structure 12 to obtain a conductive unit located in the isolation opening 120; the conductive unit is patterned to obtain a first patterned conductive layer, and the first patterned conductive layer includes a first electrode 131 and a touch control portion 141 that are spaced apart.

[0086] Step S940, preparing a second patterned conductive layer on the side of the isolation structure 12 facing away from the substrate 11, the second patterned conductive layer includes a first sub-portion ab, a third sub-portion cd and a partial connecting portion 142, and the touch portions 141 in different isolation openings 120 are connected as a whole through the first sub-portion ab, the second sub-portion bc and the third sub-portion cd, or are connected through the partial connecting portion 142 to obtain a cross-arranged first touch electrode 1401 and a second touch electrode 1402.

[0087] In one embodiment, the preparation method 800 further includes executing, before step S940:

[0088] See also Figure 6 and Figure 7 An insulating layer 15 is prepared between the first electrode 131 and the touch portion 141 , and between the touch portion 141 and the isolation structure 12 .

[0089] Specifically, an insulating material layer is prepared on the entire surface, and the insulating material layer is patterned to obtain an insulating layer 15. In one embodiment, the insulating layer 15 only fills the gap between the first electrode 131 and the touch portion 141, and the gap between the touch portion 141 and the isolation structure 12. In another embodiment, the insulating layer 15 fills the gap between the first electrode 131 and the touch portion 141, and the gap between the touch portion 141 and the isolation structure 12, while also covering the surface of the sub-pixel 13 and the touch portion 141 away from the substrate 11, and further extends to cover the surface of the isolation structure 12 away from the substrate 11. In this case, the insulating layer 15 can be a first inorganic encapsulation layer.

[0090] In one embodiment, the manufacturing method 800 further includes a step of manufacturing a packaging structure.

[0091] Fig.10 This is a schematic diagram of the structure of a display device provided in one embodiment of the present application. Fig.10 As shown, the display device includes the display panel 100 provided by any one of the above embodiments.

[0092] A display device is a product with an image display function. For example, a display device can be used to display static images, such as pictures or photos. A display device can also be used to display dynamic images, such as videos.

[0093] The display device can be a laptop computer, a mobile phone, a handheld or portable computer, a camera, a camcorder, a vehicle-mounted intelligent central control screen, a calculator, a smart watch, a GPS navigator, an electronic photo, an electronic billboard or sign, a projector, etc.

[0094] In addition, the display device may also have functions such as taking photos, 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, and the like.

[0095] The basic principles of the present application are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not for limitation, and the above details do not limit the present application to being implemented by adopting the above specific details.

[0096] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, 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 encloses a plurality of isolation openings; a plurality of sub-pixels, wherein the sub-pixels are located in the isolation opening; as well as A first touch electrode and a second touch electrode, either of the first touch electrode and the second touch electrode comprises a plurality of touch parts and a plurality of connecting parts connected to each other; the touch parts are located in the isolation openings, and in the same isolation opening, at least one touch part is partially arranged around the isolation opening, and the connecting parts connect the touch parts in different isolation openings.

2. The touch display panel according to claim 1, characterized in that: The sub-pixel comprises a first electrode, and the first electrode and the touch control part are arranged in the same layer; Preferably, the sub-pixel further includes a second electrode stacked on a side of the first electrode close to the substrate.

3. The touch display panel according to claim 2, characterized in that: One first electrode is disposed in the same isolation opening, at least one touch portion partially surrounds the first electrode, and a portion of the first electrode not surrounded by the touch portion overlaps the isolation structure; Preferably, the isolation structure comprises a stacked support portion and a crown portion, the support portion is located on a side of the crown portion close to the substrate, the orthographic projection of the support portion on the substrate is located within the orthographic projection range of the crown portion on the substrate, and a portion of the first electrode not surrounded by the touch portion overlaps the support portion; Preferably, the isolation opening comprises a straight edge, and the first electrode overlaps at least a portion of the straight edge.

4. The touch display panel according to claim 3, characterized in that: A plurality of the touch control parts are disposed in at least a portion of the isolation openings, and the plurality of the touch control parts are disposed around the isolation openings at intervals; Preferably, the plurality of touch control portions in the same isolation opening include a first touch control portion and a second touch control portion, and the first touch control portion and the second touch control portion are respectively located on two opposite sides of the sub-pixel.

5. The touch display panel according to claim 3, characterized in that: A plurality of the sub-pixels are disposed in at least part of the isolation openings, and the plurality of the sub-pixels share the same first electrode; Preferably, the light-emitting colors of the plurality of sub-pixels in the same isolation opening are the same; Preferably, the plurality of sub-pixels are arranged in an array, and the plurality of sub-pixels in the same isolation opening include a first sub-pixel and a second sub-pixel, and the first sub-pixel and the second sub-pixel are adjacent in a row direction or in a column direction; Preferably, a plurality of the sub-pixels are disposed in some of the isolation openings, and the remaining isolation openings correspond to the sub-pixels one-to-one.

6. The touch display panel according to claim 1, characterized in that: An orthographic projection of the connecting portion of the first touch electrode on the substrate intersects with an orthographic projection of the connecting portion of the second touch electrode on the substrate; Preferably, the connecting portion in the first touch electrode comprises a first connecting portion, the first connecting portion sequentially connects a first sub-portion, a second sub-portion and a third sub-portion, and an orthographic projection of the second sub-portion on the substrate intersects with an orthographic projection of a part of the connecting portion of the second touch electrode on the substrate; Preferably, the second sub-section and the isolation structure are arranged in the same layer; Preferably, the first sub-portion, the third sub-portion and the connecting portion of the second touch electrode are arranged in the same layer; Preferably, the connecting portion in the first touch electrode further includes a second connecting portion, and the second connecting portion and the connecting portion of the second touch electrode are arranged in the same layer; Preferably, the connecting portion of the second touch electrode is overlapped on a side of the isolation structure away from the substrate.

7. The touch display panel according to claim 1, characterized in that: The connecting portion of the second touch electrode is located at a side of the isolation structure away from the substrate; Preferably, the connecting portion in the first touch electrode includes a second connecting portion, and the connecting portion of the second touch electrode and the second connecting portion of the first touch electrode are arranged in the same layer.

8. The touch display panel according to claim 1, characterized in that: The plurality of connection portions and the plurality of touch portions of at least one of the first touch electrode and the second touch electrode are alternately connected; Preferably, virtual extension lines connecting two connecting portions of the same touch portion are vertical or collinear.

9. The touch display panel according to claim 2, characterized in that: It also includes an insulating layer, which is located between the first electrode and the touch control part, and between the touch control part and the isolation structure; Preferably, the insulating layer includes a first inorganic encapsulation layer.

10. The touch display panel according to claim 1, characterized in that: Also included is a packaging structure, located on a side of the sub-pixel and the isolation structure away from the substrate, and at least part of the connecting portion is located in the packaging structure; Preferably, the encapsulation structure comprises a first inorganic encapsulation layer and an organic encapsulation layer stacked together, the first inorganic encapsulation layer is located on a side of the organic encapsulation layer close to the substrate, and at least part of the connecting portion is located between the first inorganic encapsulation layer and the organic encapsulation layer; Preferably, the encapsulation structure includes a first inorganic encapsulation layer, the first inorganic encapsulation layer includes a plurality of inorganic encapsulation parts, the inorganic encapsulation parts correspond to the isolation openings one by one, the inorganic encapsulation parts cover the surfaces of the sub-pixels and the touch control parts away from the substrate, and extend to cover the edges of the isolation structure; At least part of the connecting portion is located on a side of the isolation structure away from the substrate, and is connected to the touch control portion through a conductive via penetrating the inorganic packaging portion; Preferably, the connecting portion in the first touch electrode includes a first connecting portion, the first connecting portion includes a first sub-portion, a second sub-portion and a third sub-portion connected in sequence, and the first sub-portion, the third sub-portion and the connecting portion of the second touch electrode are all located in the packaging structure.

11. The touch display panel according to claim 1, characterized in that: The isolation structure comprises a stacked support portion and a crown portion, wherein the crown portion is located on a side of the support portion away from the substrate, and an orthographic projection of the support portion on the substrate is located within the orthographic projection range of the crown portion on the substrate; Preferably, the sub-pixel comprises a first electrode, and the first electrode is overlapped with the supporting portion.

12. 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; Among them, the isolation structure encloses an isolation opening, and the sub-pixel is located in the isolation opening; either the first touch electrode and the second touch electrode includes a plurality of touch parts and a plurality of connecting parts connected as one; the touch part is located in the isolation opening, and in the same isolation opening, at least one touch part is partially arranged around the isolation opening.

13. The preparation method according to claim 12, characterized in that: The method of preparing an isolation structure, a plurality of sub-pixels, a first touch electrode and a second touch electrode on a substrate comprises: Preparing a plurality of second electrodes spaced apart from each other on a substrate; An isolation structure and a second sub-section are prepared between adjacent second electrodes, wherein the isolation structure encloses a plurality of isolation openings, and the isolation openings include at least a portion of the second electrode; the isolation structure and the second sub-section are arranged in the same layer; At least one organic layer and a first patterned conductive layer are sequentially prepared in the isolation opening, wherein the first patterned conductive layer includes a first electrode and a touch portion located in the isolation opening, and in the same isolation opening, at least one touch portion partially surrounds the first electrode, and a portion of the first electrode not surrounded by the touch portion overlaps the support portion; and A second patterned conductive layer is prepared on the side of the isolation structure facing away from the substrate, and the second patterned conductive layer includes a first sub-portion, a third sub-portion and a connecting portion. The touch portions in different isolation openings are connected as a whole through the first sub-portion, the second sub-portion and the third sub-portion, or are connected through the connecting portion to obtain cross-arranged first touch electrodes and second touch electrodes.

14. The preparation method according to claim 13, characterized in that: Before preparing the second patterned conductive layer on the side of the isolation structure facing away from the substrate, the method further includes: An insulating layer is prepared between the first electrode and the touch portion, and between the touch portion and the isolation structure.

15. A display device, characterized in that: A touch display panel comprising any one of claims 1-11.

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