Display panel and manufacturing method thereof

Abstract

The present disclosure provides a display panel and a manufacturing method thereof, and belongs to the technical field of display. The display panel comprises: a display substrate having a display area and a peripheral area surrounding the display area; a touch layer stacked on the display substrate, the touch layer comprising a plurality of touch electrodes and a plurality of wires, the orthographic projection of the plurality of touch electrodes on the display substrate being located in the display area, and the orthographic projection of the plurality of wires on the display substrate being located in the peripheral area; one end of the plurality of wires is connected with the corresponding touch electrode, and the other end of the plurality of wires is located in a plurality of binding areas arranged at intervals in the touch layer, the orthographic projection of the plurality of binding areas on the display substrate being located in a first peripheral sub-area, the first peripheral sub-area being a part of the peripheral area on the side of the display area, and the plurality of binding areas being arranged along the extension direction of the outer side edge of the first peripheral sub-area.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of display, and in particular, to a display panel and a manufacturing method thereof. BACKGROUND

[0002] With the screen ratio of electronic devices becoming larger and larger, the requirement for narrow frame of display panels is becoming higher and higher.

[0003] Taking a display panel with touch function as an example, the display panel includes a display substrate and a touch layer on the display substrate, the display substrate has a display area and a peripheral area at the periphery of the display area, and the touch layer includes a plurality of touch electrodes on the display substrate, the plurality of touch electrodes are projected onto the display area, and a plurality of traces connected with the plurality of touch electrodes are projected onto the peripheral area. Usually, one end of each of the plurality of traces is connected with a corresponding touch electrode, and the other end of each of the plurality of traces is concentrated in a binding area on the out-line side of the display panel, and the binding area is used for binding with a flexible printed circuit (FPC).

[0004] One end of each of the plurality of traces can be connected with a corresponding touch electrode through each side of the display area, and the other end of each of the plurality of traces extends to the out-line side of the display panel, and the other end of each of the plurality of traces is projected onto the peripheral area of the display substrate and extends along the outer edge direction of the peripheral area, and the traces projected onto the peripheral area of the display substrate on the out-line side of the display panel are arranged in parallel and spaced apart.

[0005] In order to accommodate the plurality of traces at the same time, the peripheral area on the out-line side of the display panel needs to be set wider, which results in a larger frame on the out-line side and is not conducive to realizing a narrow frame. SUMMARY

[0006] Embodiments of the present disclosure provide a display panel and a manufacturing method thereof, which can realize a narrow frame design of the display panel. The technical solutions are as follows:

[0007] In one aspect, a display panel is provided, which includes a display substrate and a touch layer.

[0008] The display substrate has a display area and a peripheral area surrounding the display area; a touch layer is laminated on the display substrate, the touch layer includes a plurality of touch electrodes and a plurality of wires, a projection of the plurality of touch electrodes on the display substrate is located in the display area, and a projection of the plurality of wires on the display substrate is located in the peripheral area; one end of the plurality of wires is connected to the corresponding touch electrode, and the other end of the plurality of wires is located in a plurality of binding areas arranged at intervals in the touch layer, a projection of the plurality of binding areas on the display substrate is located in a first peripheral sub-area, the first peripheral sub-area is a part of the peripheral area on a side of the display area, and the plurality of binding areas are arranged along an extension direction of an outer side edge of the first peripheral sub-area.

[0009] Optionally, the peripheral area further includes a second peripheral sub-area and a third peripheral sub-area, the second peripheral sub-area and the third peripheral sub-area are connected to the first peripheral sub-area respectively, and the second peripheral sub-area, the first peripheral sub-area and the third peripheral sub-area are located on the sides of the three sides connected to the display area respectively; the plurality of wires includes a first wire, a second wire and a third wire, in the projection of the touch layer on the display substrate, the first wire is connected to the corresponding touch electrode from a side of the display area close to the first peripheral sub-area, the second wire is connected to the corresponding touch electrode from a side of the display area close to the second peripheral sub-area, and the third wire is connected to the corresponding touch electrode from a side of the display area close to the third peripheral sub-area; the plurality of binding areas includes a first binding area corresponding to the first wire, a second binding area corresponding to the second wire, and a third binding area corresponding to the third wire; and the first binding area is located between the second binding area and the third binding area.

[0010] Optionally, the number of the first binding areas is 2, and the number of the second binding area and the third binding area is 1; or the number of the first binding areas, the number of the second binding area and the number of the third binding area are all 1.

[0011] Optionally, the touch layer further includes a flexible film; one part of the touch electrodes and the wires is located on one side of the flexible film, and the other part of the touch electrodes and the wires is located on the other side of the flexible film.

[0012] The wire in any first binding area is connected to a first FPC, the wire in any second binding area is connected to a second FPC, and the wire in any third binding area is connected to a third FPC; a part of the first FPC, the second FPC and the third FPC is bound with the wire on one side of the touch layer, and another part of the first FPC, the second FPC and the third FPC is bound with the wire on the other side of the touch layer.

[0013] Optionally, the first FPC is bound with the wire on one side of the touch layer, and the second FPC and the third FPC are bound with the wire on the other side of the touch layer.

[0014] Optionally, the display panel further comprises a polarizer and an optical adhesive layer, the polarizer is located on the first side of the touch layer, the optical adhesive layer is bonded between the polarizer and the touch layer, and the edge of the polarizer and the optical adhesive layer has a first notch for avoiding the FPC located on the first side of the touch layer.

[0015] Optionally, the optical adhesive layer is bonded with each FPC located on the second side of the touch layer, and the first side and the second side are opposite sides of the touch layer.

[0016] Optionally, the display panel further comprises a driving IC located on the display substrate and located in the peripheral area; the binding area and the driving IC are located in the first peripheral sub-area, and along the extension direction of the outer side edge of the first peripheral sub-area, the binding area and the driving IC are arranged alternately.

[0017] In one aspect, a display panel manufacturing method is provided, the method comprising: providing a display substrate, the display substrate having a display area and a peripheral area surrounding the display area; forming a touch layer on the display substrate, the touch layer comprising a plurality of touch electrodes and a plurality of wires, a projection of the plurality of touch electrodes on the display substrate being located in the display area, a projection of the plurality of wires on the display substrate being located in the peripheral area; one end of the plurality of wires is connected to the corresponding touch electrode, and the other end of the plurality of wires is located in a plurality of binding areas arranged at intervals in the touch layer, a projection of the plurality of binding areas on the display substrate being located in a first peripheral sub-area, the first peripheral sub-area being a part of the peripheral area on one side of the display area, and the plurality of binding areas being arranged along the extension direction of the outer side edge of the first peripheral sub-area.

[0018] Optionally, the forming the touch control layer on the display substrate comprises: manufacturing a touch control film; sequentially forming a polarizing sheet and an optical adhesive layer on the display substrate; and adhering the touch control film to the optical adhesive layer as the touch control layer, the optical adhesive layer being bonded between the polarizing sheet and the touch control layer.

[0019] Optionally, the manufacturing the touch control film comprises: providing a flexible film; forming the touch control electrodes and the traces on both sides of the flexible film; opening a second notch on the flexible film at a portion corresponding to the binding area; and binding the FPC and the traces at the second notch.

[0020] Optionally, the FPC comprises an FPC bound to one side of the touch control layer and an FPC bound to the other side of the touch control layer.

[0021] The sequentially forming the polarizing sheet and the optical adhesive layer on the display substrate comprises: forming a first notch on the polarizing sheet and the optical adhesive layer, the first notch being used for avoiding the FPC on one side of the touch control layer; and adhering the polarizing sheet and the optical adhesive layer with the first notch to the display substrate.

[0022] Optionally, the manufacturing the touch control film further comprises: after the binding of the FPC and the traces at the second notch, cutting off the portions of the flexible film on both sides of the second notch.

[0023] The technical scheme provided by the embodiments of the present disclosure has the following beneficial effects:

[0024] In the embodiments of the present disclosure, the plurality of traces in the touch control layer extend to the peripheral area on the same side of the display area, and the plurality of traces are bound by extending to different binding areas, so that all the traces do not extend to the same place; since the traces in the same binding area need to be arranged in parallel when extending along the length direction of the first peripheral sub-area, the plurality of binding areas are arranged at intervals, so as to avoid the parallel arrangement of the traces in different binding areas as much as possible, thereby avoiding the problem of excessive concentration of the traces and the excessive frame caused by the problem, and facilitating the narrow frame of the display panel. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical scheme in the embodiments of the present disclosure, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art without creative labor.

[0026] Figure 1 is a structural schematic diagram of a display panel provided by the embodiments of the present disclosure;

[0027] Figure 2 is a structural diagram of a touch layer provided by an embodiment of the present disclosure;

[0028] Figure 3 a position of a driving IC in a display panel provided by an embodiment of the present disclosure is shown;

[0029] Figure 4 is a structural diagram of a display panel provided by an embodiment of the present disclosure;

[0030] Figure 5 is a position of a film layer in a display panel provided by an embodiment of the present disclosure;

[0031] Figure 6 is Figure 5 is an enlarged diagram of a position where a second FPC and a third FPC are bound in the display panel;

[0032] Figure 7 is Figure 5 is an enlarged diagram of a position where a first FPC is bound in the display panel;

[0033] Figure 8 is a flowchart of a display panel manufacturing method provided by an embodiment of the present disclosure;

[0034] Figure 9 is a flowchart of a display panel manufacturing method provided by an embodiment of the present disclosure;

[0035] Figure 10 is a structural diagram in a display panel manufacturing process of an embodiment of the present disclosure;

[0036] Figure 11 is a structural diagram in a display panel manufacturing process of an embodiment of the present disclosure;

[0037] Figure 12 is a structural diagram in a display panel manufacturing process of an embodiment of the present disclosure;

[0038] Figure 13 is a structural diagram in a display panel manufacturing process of an embodiment of the present disclosure;

[0039] Figure 14 is a structural diagram in a display panel manufacturing process of an embodiment of the present disclosure. DETAILED DESCRIPTION

[0040] To make the objectives, technical solutions, and advantages of the present disclosure clearer, the following will further describe embodiments of the present disclosure in detail with reference to the accompanying drawings.

[0041] Figure 1 is a structural diagram of a display panel provided by an embodiment of the present disclosure. Referring to Figure 1The display panel comprises a display substrate 100 and a touch layer 101, the touch layer 101 is laminated on the display substrate 100, and the touch layer 101 comprises a plurality of touch electrodes 111 and a plurality of wires 112. The wire 112 herein is a touch wire.

[0042] The display substrate 100 has a display area 110 and a peripheral area (also referred to as a peripheral area or a non-display area) 120 surrounding the display area 110. The orthogonal projection of the plurality of touch electrodes 111 on the display substrate 100 is located in the display area 110, and the orthogonal projection of the plurality of wires 112 on the display substrate 100 is located in the peripheral area 120. One end of the plurality of wires 112 is connected to the corresponding touch electrode 111, and the other end of the plurality of wires 112 is located in a plurality of binding areas 1200 arranged at intervals in the touch layer 101. The orthogonal projection of the plurality of binding areas 1200 on the display substrate 100 is located in a first peripheral sub-area 121, which is a part of the peripheral area 120 located on one side of the display area 110, and the plurality of binding areas 1200 are arranged along the extension direction A of the outer side edge of the first peripheral sub-area 121. The outer side refers to the side of the first peripheral sub-area away from the display area 110.

[0043] The other end of the plurality of wires 112 located in the plurality of binding areas 1200 arranged at intervals means that the plurality of wires 112 are divided into a plurality of groups, and the other end of each group of wires 112 extends into a small area and is bound there. The distance between the other ends of two wires in each group of wires 112 is less than the distance between the other ends of two wires belonging to different groups, that is, the distance between the wires belonging to the same group is small, and the distance between the wires belonging to different groups is large. The small areas where the plurality of groups of wires 112 extend are arranged at intervals, that is, the other ends of the plurality of groups of wires 112 are arranged at intervals. The binding area 1200 herein refers to an area for binding the other end of the wire and the circuit board, that is, the binding area is a touch binding area.

[0044] In the embodiments of the present disclosure, the orthogonal projection of the touch electrode 111 on the display substrate is in the display area, which can also be referred to as the touch electrode 111 in the touch layer 101 being located in the display area. Accordingly, the orthogonal projection of the wire 112 on the display substrate is in the peripheral area, which can also be referred to as the wire 112 being located in the peripheral area. The subsequent descriptions of the relationship between other film layers located above the display substrate and the display area and the peripheral area are also in this manner. In addition, in the subsequent description, the orthogonal projection refers to the orthogonal projection on the display substrate unless otherwise specified.

[0045] Since multiple touch electrodes 111 are distributed within the display area 110 of the display substrate 100, the display area 110 is also a touch function area. The display panel provided in this embodiment is also referred to as a touch screen panel (TSP).

[0046] In this embodiment, multiple traces in the touch layer extend to the peripheral area on the same side of the display area. By extending multiple traces to different binding areas for binding, all traces are prevented from extending to the same place. Since the traces in the same binding area need to be arranged in parallel when extending along the length direction of the first peripheral sub-area, setting multiple binding areas at intervals can minimize the problem of excessively concentrated traces in different binding areas, which would otherwise result in an excessively large bezel. This is beneficial for making the display panel have a narrow bezel.

[0047] For example, the display substrate 100 is an organic light-emitting diode (OLED) display substrate. An OLED display substrate typically includes an array substrate and a light-emitting layer located on the array substrate.

[0048] Optionally, such as Figure 1 As shown, the touch electrode 111 is a strip electrode, which is divided into intersecting horizontal electrodes and vertical electrodes. One of the horizontal electrodes and the vertical electrodes is a driving electrode, and the other is a sensing electrode. The driving electrode and the sensing electrode are used to emit driving signals and receive sensing signals during the touch sensing process, respectively.

[0049] For example, the lateral and vertical electrodes are insulated from each other, such as being disposed on opposite sides of a flexible thin film. Figure 2 This is a schematic diagram of the structure of a touch layer provided in an embodiment of this disclosure. Figure 2 As shown Figure 1 See the cross-sectional view of the touch layer at point bb. Figure 2 The touch layer 101 also includes a flexible film 113. A portion of the touch electrode 111 and the trace 112 are located on one side of the flexible film 113, and another portion of the touch electrode 111 and the trace 112 are located on the other side of the flexible film 113. That is, the touch electrode 111 and the trace 112 are arranged on both sides of the flexible film 113 (the trace below the flexible film 113 is not shown in the figure).

[0050] For example, the flexible film 113 is polyethylene terephthalate (PET).

[0051] Terephthalate (PET) film.

[0052] In Figure 1 and Figure 2 , the touch electrode 111 is described by taking a strip electrode as an example, and in other implementation manners, the touch electrode 111 can also be a block electrode or an electrode of other shapes.

[0053] In the embodiments of the present disclosure, in addition to the first peripheral sub-area 121, the peripheral area 120 can further include a peripheral sub-area located on other sides of the display area. The orthogonal projections of the plurality of wires in the display panel on the display substrate are located in different peripheral sub-areas, the orthogonal projections of these wires on the display substrate all extend to the first peripheral sub-area, and the orthogonal projections of these wires in the first peripheral sub-area are not crossed. For example, the orthogonal projections of the wires in the first peripheral sub-area 121 and the orthogonal projections of the wires in another peripheral sub-area adjacent to the first peripheral sub-area 121 are separated from each other in the first peripheral sub-area 121.

[0054] Referring again to Figure 1 , in addition to the first peripheral sub-area 121, the peripheral area 120 further includes a second peripheral sub-area 122 and a third peripheral sub-area 123, the second peripheral sub-area 122 and the third peripheral sub-area 123 are connected with the first peripheral sub-area 121 respectively, and the second peripheral sub-area 122, the first peripheral sub-area 121 and the third peripheral sub-area 123 are respectively located on the sides where the three sides of the display area 110 are connected.

[0055] Exemplarily, usually the bottom side of the display panel is the wire-out side, accordingly, the first peripheral sub-area 121 is the peripheral area close to the bottom side of the display panel, and the second peripheral sub-area 122 and the third peripheral sub-area 123 are the peripheral areas close to the two sides of the display panel, for example, the second peripheral sub-area 122, the first peripheral sub-area 121 and the third peripheral sub-area 123 are respectively located on the left side, the lower side and the right side of the display area 110.

[0056] The multiple traces 112 include a first trace 1121, a second trace 1122, and a third trace 1123. In the orthographic projection of the touch layer 101 onto the display substrate 100, the first trace 1121 connects to the corresponding touch electrode 111 from the side of the display area 110 near the first peripheral sub-region 121, the second trace 1122 connects to the corresponding touch electrode 111 from the side of the display area 110 near the second peripheral sub-region 122, and the third trace 1123 connects to the corresponding touch electrode 111 from the side of the display area 110 near the third peripheral sub-region 123. That is, the first trace 1121 is projected onto the display substrate 100 from the side of the display area 110 near the first peripheral sub-region 121 to connect to the corresponding touch electrode 111 projected onto the display substrate 100; the second trace 1122 is projected onto the display substrate 100 from the side of the display area 110 near the second peripheral sub-region 122 to connect to the corresponding touch electrode 111 projected onto the display substrate 100; and the third trace 1123 is projected onto the display substrate 100 from the side of the display area 110 near the third peripheral sub-region 123 to connect to the corresponding touch electrode 111 projected onto the display substrate 100.

[0057] The plurality of binding regions 1200 include a first binding region 1201 corresponding to the first trace 1121, a second binding region 1202 corresponding to the second trace 1122, and a third binding region 1203 corresponding to the third trace 1123.

[0058] like Figure 1 As shown, the first binding region 1201 is located between the second binding region 1202 and the third binding region 1203.

[0059] Since the first peripheral sub-region 121 is connected between the second peripheral sub-region 122 and the third peripheral sub-region 123, the first binding region 1201 is also set between the second binding region 1202 and the third binding region 1203. In this way, the wiring from each peripheral region will not cross, which is convenient for wiring layout and ensures that the width of the first peripheral sub-region is minimized, which is beneficial for narrow bezel design.

[0060] like Figure 1 As shown, a portion of the lateral electrodes connects to traces orthographically projected into the second peripheral sub-region 122, while another portion connects to traces orthographically projected into the third peripheral sub-region 123. Typically, the number of lateral electrodes connecting to traces orthographically projected into the second peripheral sub-region 122 is the same as the number connecting to traces orthographically projected into the third peripheral sub-region 123. It should be noted that...Figure 1 For the structural diagram of the display panel, only a small number of touch electrodes, traces, etc. are taken as examples, and the number of touch electrodes and traces in the actual display panel is much larger than this.

[0061] As shown in Figure 1 , the number of the first binding areas 1201 is 2, and the number of the second binding areas 1202 and the third binding areas 1203 is 1. The two first binding areas here can correspond to two parts of the traces projected on the first peripheral sub-area 121 respectively, and the two parts of the traces can be located on the left and right sides of the first binding area along the middle line thereof.

[0062] In other implementations, the number of the first binding areas 1201, the number of the second binding areas 1202, and the number of the third binding areas 1203 are all 1.

[0063] Generally, in the case of a large number of traces, the number of binding areas can be set to be larger.

[0064] As shown in Figure 1 , the traces 112 in any first binding area 1201 are connected to a first flexible printed circuit (FPC) 201, the traces 112 in any second binding area 1202 are connected to a second FPC 202, and the traces 112 in any third binding area 1203 are connected to a third FPC 203.

[0065] Different numbers of binding areas correspond to different numbers of FPCs, and different numbers of FPCs are suitable for different touch protocol schemes. For example, when there are 4 binding areas, the corresponding number of FPCs is 4, as shown in Figure 1 , which is suitable for the 4-FPC scheme corresponding to the Microsoft Pen (MPP) protocol of Microsoft; when there are 3 binding areas, the corresponding number of FPCs is 3, for example, on the basis of Figure 1 , the first FPC 201 is retained only 1, which is suitable for the 3-FPC scheme corresponding to the Active ElectroStatic (AES) protocol of Wacom.

[0066] Part of the first FPC 201, the second FPC 202, and the third FPC 203 is located on one side of the touch layer 101 and is bound to the traces 112 on one side of the touch layer 101, and the other part of the first FPC 201, the second FPC 202, and the third FPC 203 is located on the other side of the touch layer 101 and is bound to the traces 112 on the other side of the touch layer 101.

[0067] As described above, since the touch electrodes 111 and the traces 112 are distributed on two surfaces of the touch layer 101, correspondingly, the FPCs bound with the traces 112 are also located on the two surfaces of the touch layer 101.

[0068] Exemplarily, the first FPC 201 is located on one surface of the touch layer 101 and is bound with the traces 112 on the one surface of the touch layer 101, and the second FPC 202 and the third FPC 203 are located on the other surface of the touch layer 101 and are bound with the traces 112 on the other surface of the touch layer 101.

[0069] Again referring to Figure 1 The display panel further includes a driving integrated circuit (IC) 300 located on the display substrate 100 and located in the peripheral region.

[0070] The normal projection of the binding region 1200 on the display substrate 100 and the driving IC 300 are located in the first peripheral sub-region 121, and along the extension direction A of the outer side edge of the first peripheral sub-region 121, the normal projection of the binding region 1200 on the display substrate 100 and the driving IC 300 are arranged alternately. Since the driving IC and the FPC, the trace and the like have overlap in the height direction, that is, if the driving IC and the trace (or the FPC) are located at the same position above the display substrate, interference will occur, and through the design, the interference of the IC and the FPC in the horizontal position is avoided, and mutual avoidance is realized; at the same time, the side frame is narrowed by arranging side by side.

[0071] Exemplarily, the driving IC 300 is a display driving IC, which is used to drive the display substrate to display. The display driving IC can be a source (Source) driving IC.

[0072] As shown in Figure 3 By arranging the plurality of binding regions at intervals, the driving IC 300 can not only be located between the plurality of binding regions, but also be distributed between the plurality of groups of traces, that is, the plurality of groups of traces are led out from between the plurality of driving ICs, solving the problem of excessive side frame caused by the space of the touch trace being compressed by the driving IC in the related art, and realizing the narrow side frame design of the display panel. Here, one group of traces refers to the traces extending to the same binding region.

[0073] In addition, through the trace design of the embodiment of the present disclosure, the problem that the collision between the traces and the driving IC occurs due to the accumulation of the traces is avoided, and the safety of the driving IC is improved.

[0074] Taking a 14-inch product as an example, Figure 3 a schematic diagram of the position of the driving IC in the display panel provided by the embodiment of the present disclosure is shown. Referring to Figure 4The distance L from the driving IC 300 to the side edge of the display area 110 is 2.915 mm. In the related art, when the wire is drawn from the same area of the peripheral area, the width of the space required for the wire of the touch layer to the lower frame in the panel column direction is 3.78 mm, at which time, the touch layer interferes with the position of the driving IC. When the wire scheme provided in the present disclosure is adopted, the width D of the space required for the wire of the touch layer to the lower frame in the panel column direction is 2.615 mm, the touch layer does not interfere with the position of the driving IC, and the design requirement is met.

[0075] Figure 4 is a schematic diagram of a hierarchical structure of a display panel provided by an embodiment of the present disclosure. Referring to Figure 4 , the display panel further includes a polarizer (POL) 102 and an optically clear adhesive (OCA) layer 103, the polarizer 102 is located on the display substrate 100, and the optically clear adhesive layer 103 is bonded between the polarizer 102 and the touch layer 101.

[0076] The optically clear adhesive layer 103 is located below the touch layer 101, and therefore can also be referred to as a lower optically clear adhesive layer.

[0077] Referring again to Figure 4 , the display panel further includes an upper optically clear adhesive layer 104 and a transparent cover plate 105 which are sequentially stacked on the touch layer 101.

[0078] Exemplarily, the transparent cover plate 105 is a glass cover plate or a plastic cover plate.

[0079] As shown in Figure 5 , the driving IC 300 protrudes from the surface of the display substrate 100, and therefore, the polarizer 102 and the optically clear adhesive layer 103 and the like need to be avoided.

[0080] Figure 5 is a schematic diagram of the position of a film layer in a display panel provided by an embodiment of the present disclosure. Referring to Figure 5 , the edges of the polarizer 102 and the optically clear adhesive layer 103 have a first notch 1230, the first notch 1230 is used to avoid the FPC located on the side of the touch layer 101 facing the display substrate 100, that is, the FPC on the side of the touch layer 101 facing the display substrate 100 is actually between the touch layer 101 and the display substrate 100, and there is no polarizer 102 and optically clear adhesive layer 103 between the FPC and the display substrate. By opening the first notch 1230 for FPC avoidance, the flatness of the display panel can be improved.

[0081] As shown in Figure 4As shown, the polarizer 102 and the optical adhesive layer 103 are provided with a first notch 1230 corresponding to the positions of the second FPC 202 and the third FPC 203, and no first notch is provided corresponding to the position of the first FPC 201.

[0082] Figure 5 The provided scheme is because the polarizer 102 is located between the display substrate 100 and the touch layer 101. If the polarizer 102 is arranged above the touch layer 101, that is, the polarizer is located between the touch layer 101 and the transparent cover plate 105, then a first notch is opened on the polarizer 102 and the upper optical adhesive layer 104 at this time, and the first notch 1230 is used to avoid the FPC located on the side of the touch layer 101 away from the display substrate 100.

[0083] Referring to Figure 5 In the touch layer 101, the flexible film 113 has an outward protrusion 1130 corresponding to the position of the FPC, the protrusion 1130 corresponds to the binding area, and the main function of the protrusion 1130 is to facilitate the binding of the FPC and the traces (not shown) on the flexible film. Figure 6

[0084] Because the polarizer 102 and the optical adhesive layer 103 are only provided with a first notch corresponding to the position of the FPC on the side of the touch layer 101 facing the display substrate 100, for the FPC on the side of the touch layer 101 away from the display substrate 100, the part of the FPC that extends after being bound with the touch layer will be in contact with the optical adhesive layer 103. Therefore, the optical adhesive layer 103 is bonded with each FPC on the side of the touch layer 101 away from the display substrate 100, respectively.

[0085] If the polarizer 102 is arranged above the touch layer 101, then the upper optical adhesive layer 104 is bonded with each FPC on the side of the touch layer 101 facing the display substrate 100, respectively.

[0086] That is, the polarizer 102 is located on the first side of the touch layer 101, the first notch 1230 is used to avoid the FPC located on the first side of the touch layer 101, and the optical adhesive layer bonded with the polarizer 102 is bonded with each FPC on the second side of the touch layer 101, respectively, the first side and the second side being two opposite sides of the touch layer 101.

[0087] Figure 5 is Figure 6 An enlarged schematic view of the binding positions of the second FPC and the third FPC. Referring to Figure 7 ​At the two sides of the binding area, the edges of the touch layer 101 and the optical adhesive layer 103 almost overlap, while at the binding area, the optical adhesive layer 103 is recessed inward due to the first notch, and the touch layer 101 has the aforementioned protrusion. In this case, when the FPC and the bottom surface of the touch layer are bound, the optical adhesive layer and the underlying polarizer do not interfere with the FPC.

[0088] Figure 5 is Figure 7 is an enlarged view of the first FPC binding in the display panel 100. Referring to Figure 6 At the two sides of the binding area, the edges of the touch layer 101 and the optical adhesive layer 103 almost overlap, while at the binding area, the touch layer 101 has the aforementioned protrusion, and likewise, the optical adhesive layer 103 also has a protrusion outwardly at this position, and the degree of protrusion of the optical adhesive layer 103 outwardly is greater than that of the touch layer 101. After the FPC and the top surface of the touch layer are bound, the part of the FPC extending from the protruding edge of the touch layer 101 towards the side of the optical adhesive layer 103 can be bonded with the protrusion of the optical adhesive layer 103, playing a mechanical fixing role.

[0089] In Figure 7 and Figure 8 the area with hatching represents the part of the FPC and the touch layer binding.

[0090] Exemplarily, the thickness of the display substrate 100 is 10 microns, the thickness of the polarizer 102 is 147 microns, the thickness of the optical adhesive layer 103 is 100 microns, the thickness of the flexible film 113 in the touch layer 101 is 50 microns, the surface resistivity is less than 10 ohm / sq, the thickness of the upper optical adhesive layer 104 is 200 microns, and the thickness of the transparent cover plate 105 is 0.7 millimeters.

[0091] Of course, the thicknesses here are only an example, and in other implementations, the thicknesses of the various film layers can be greater or smaller, which is not limited in the disclosure.

[0092] The display panel provided by the embodiments of the disclosure is suitable for touch control scheme design in medium and large size electronic devices, and is particularly suitable for notebook computer products. By leading out the touch control traces to multiple binding areas, the narrow frame of the product is realized.

[0093] Figure 8 is a flowchart of a display panel manufacturing method provided by an embodiment of the disclosure. Referring to Figure 9 The method comprises the following steps:

[0094] Step 501: providing a display substrate, the display substrate having a display area and a peripheral area surrounding the display area.

[0095] Step 502: forming a touch layer on the display substrate, the touch layer comprising a plurality of touch electrodes and a plurality of traces, a projection of the plurality of touch electrodes on the display substrate being located in the display area, and a projection of the plurality of traces on the display substrate being located in the peripheral area.

[0096] wherein one end of the plurality of traces is connected with the corresponding touch electrode, and the other end of the plurality of traces is located in a plurality of binding areas arranged at intervals in the touch layer, a projection of the plurality of binding areas on the display substrate being located in a first peripheral sub-area, the first peripheral sub-area being a partial area of the display area on one side of the peripheral area, and the plurality of binding areas being arranged along an extension direction of an outer side edge of the first peripheral sub-area.

[0097] In the embodiments of the present disclosure, the traces connected by the touch layer extend to the peripheral area on the same side of the display area, and the plurality of traces are bound by extending to different binding areas, thereby avoiding all the traces extending to the same place. In this way, only the traces in the same binding area need to be arranged in parallel when extending along the length direction of the first peripheral sub-area, thereby avoiding all the traces being arranged in parallel in the first peripheral sub-area, and the problem of excessive frame caused by the concentration of the traces, which is conducive to the narrow frame of the display panel.

[0098] Figure 9 is a flowchart of a display panel manufacturing method provided by the embodiments of the present disclosure. Referring to Figure 10 , the method comprises:

[0099] Step 601: providing a display substrate, the display substrate having a display area and a peripheral area surrounding the display area.

[0100] Exemplarily, the display substrate is an OLED display substrate.

[0101] Step 602: providing a flexible film.

[0102] Exemplarily, the flexible film is a PET film.

[0103] Step 603: forming the touch electrodes and the traces on both sides of the flexible film.

[0104] wherein the touch electrodes and the traces can be formed on both sides of the flexible film by printing.

[0105] Step 604: opening a second notch in the part of the flexible film corresponding to the binding area.

[0106] As Figure 11As shown, four second notches 1131 are formed in the flexible film 113 at positions corresponding to the binding areas. The main function of the second notches 1131 is to facilitate the binding of the FPC and the traces on the flexible film. The second notches only occupy a part of the binding areas, and do not occupy the entire binding areas. The other part of the binding areas is occupied by the touch layer for binding.

[0107] Step 605: binding the FPC and the traces at the second notches to obtain a touch film.

[0108] One end of the FPC is bound to the traces located at the edge of the second notches of the flexible film, and then extends to the outside of the display panel through the second notches. The binding of the FPC is performed before the touch layer and the display substrate are attached, so as to avoid the influence of the binding process on the attachment effect of the two when the attachment is performed first and then the binding.

[0109] In the embodiments of the present disclosure, the FPC includes FPCs bound to one side of the touch layer and FPCs bound to the other side of the touch layer.

[0110] As shown, Figure 12 Four FPCs are bound at the four second notches 1131 of the flexible film 113, respectively.

[0111] Step 606: sequentially forming a polarizing sheet and an optical adhesive layer on the display substrate.

[0112] Exemplarily, step 606 includes:

[0113] forming first notches on the polarizing sheet and the optical adhesive layer, the first notches being used for avoiding the FPCs on the side of the touch layer facing the display substrate. As shown, Figure 13 two first notches 1230 are formed on the polarizing sheet 102 and the optical adhesive layer 103.

[0114] attaching the polarizing sheet and the optical adhesive layer, on which the first notches are formed, to the display substrate. As shown, Figure 14 the polarizing sheet 102 and the optical adhesive layer 103, on which the first notches 1230 are formed, are attached to the display substrate 100.

[0115] For example, the polarizing sheet and the optical adhesive layer are cut at the positions corresponding to the first binding areas to form the aforementioned first notches. The first binding areas are the binding areas corresponding to the FPCs on the side of the touch layer facing the display substrate.

[0116] The polarizing sheet is directly attached to the display substrate because the bottom of the polarizing sheet is provided with adhesive.

[0117] Step 607: attaching the touch film to the optical adhesive layer as the touch layer, and the optical adhesive layer is attached between the polarizing sheet and the touch layer.

[0118] As shown in Figure 5 The touch layer with the FPC bound thereto is attached to the optical adhesive layer 103.

[0119] Step 608: The portions of the flexible film on both sides of the second gap are cut off.

[0120] In the embodiments of the present disclosure, the flexible film is cut off at the position where the FPC is located by the cutting process of step 604. The touch film is obtained by binding the FPC to the cut-off portion of the flexible film, and the touch film, the polarizing sheet and the optical adhesive layer are attached, and then the flexible film on both sides of the second gap in the peripheral area is subjected to a second cutting. It should be noted that after the second cutting, the first gap disappears, and a protrusion corresponding to each FPC appears, which can be seen from the structure shown in Figure 5 Therefore, the depth of the second cutting can be slightly greater than the depth of the first gap, but the depth of the second cutting is less than the width of the peripheral area, so the second cutting does not affect the wiring in the peripheral area.

[0121] Correspondingly, a gap is also formed on the polarizing sheet and the optical adhesive layer after step 607. After the touch layer and the polarizing sheet and the optical adhesive layer are attached, the polarizing sheet and the optical adhesive in other parts of the peripheral area can also be subjected to a second cutting. After the second cutting, the second gap becomes smaller, and a protrusion corresponding to the FPC without the second gap appears, which can be seen from the structure shown in ​ .

[0122] The second cutting of the flexible film, the polarizing sheet and the optical adhesive can be performed simultaneously.

[0123] Since the FPC is cut off at the first gap and the second gap, the cutting of the flexible film, the polarizing sheet and the optical adhesive will not be affected by the FPC after attachment, ensuring the shape accuracy.

[0124] Since the polarizing sheet and the optical adhesive layer are only provided with the first gap at the positions corresponding to the FPC on the side of the touch layer facing the display substrate, for the FPC on the side of the touch layer away from the display substrate, the positions corresponding to these FPCs do not have the first gap, and the polarizing sheet and the optical adhesive will not be cut off during the second cutting. Therefore, a larger protrusion is reserved, which is greater than the protrusion reserved by the flexible film. The portion of the FPC protruding from the touch layer will contact the optical adhesive layer here, thereby realizing the positioning and mechanical fixing of the FPC on the side of the touch layer away from the display substrate.

[0125] Step 609: Forming an upper optical adhesive layer and a transparent cover plate on the touch layer in sequence.

[0126] Those skilled in the art can understand that all or part of the steps of the above-mentioned embodiments can be completed by hardware, or can be instructed by a program to complete the related hardware, and the program can be stored in a computer readable storage medium. The storage medium mentioned above can be a read-only memory, a magnetic disk or an optical disk, etc.

[0127] The above only describes optional embodiments of the present disclosure and is not intended to limit the present disclosure. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A display panel, characterized in that, The display panel includes: A display substrate has a display area and a peripheral area surrounding the display area; A touch layer is stacked on the display substrate. The touch layer includes multiple touch electrodes and multiple traces. The orthographic projection of the multiple touch electrodes on the display substrate is located in the display area, and the orthographic projection of the multiple traces on the display substrate is located in the peripheral area. Wherein, one end of the multiple traces is connected to the corresponding touch electrode, and the other end of the multiple traces is located in multiple bonding areas arranged at intervals in the touch layer. The orthographic projection of the multiple bonding areas on the display substrate is located in a first peripheral sub-region. The first peripheral sub-region is a part of the display area on one side of the peripheral region. The multiple bonding areas are arranged along the extension direction of the outer edge of the first peripheral sub-region. Multiple FPCs, including an FPC bonded to one side of the touch layer and an FPC bonded to the other side of the touch layer; A polarizer is located on the first surface of the touch layer; An optical adhesive layer is bonded between the polarizer and the touch layer. The edges of the polarizer and the optical adhesive layer have a first notch, which is used to avoid the FPC located on the first side of the touch layer. The optical adhesive layer is bonded to each FPC located on the second side of the touch layer. The first side and the second side are two opposite sides of the touch layer.

2. The display panel according to claim 1, characterized in that, The surrounding area also includes a second surrounding sub-area and a third surrounding sub-area, the second surrounding sub-area and the third surrounding sub-area being connected to the first surrounding sub-area respectively, and the second surrounding sub-area, the first surrounding sub-area and the third surrounding sub-area being located on the three sides connected to the display area respectively; The multiple traces include a first trace, a second trace, and a third trace. In the orthographic projection of the touch layer onto the display substrate, the first trace connects to the corresponding touch electrode from the side of the display area near the first peripheral sub-area, the second trace connects to the corresponding touch electrode from the side of the display area near the second peripheral sub-area, and the third trace connects to the corresponding touch electrode from the side of the display area near the third peripheral sub-area. The plurality of binding regions include a first binding region corresponding to the first trace, a second binding region corresponding to the second trace, and a third binding region corresponding to the third trace; The first binding region is located between the second binding region and the third binding region.

3. The display panel according to claim 2, characterized in that, The number of the first binding region is 2, and the number of the second binding region and the third binding region are both 1. Alternatively, the number of the first binding region, the number of the second binding region, and the number of the third binding region are all 1.

4. The display panel according to claim 2, characterized in that, The touch layer further includes: a flexible film; a portion of the touch electrode and the trace are located on one side of the flexible film, and another portion of the touch electrode and the trace are located on the other side of the flexible film; A trace in any first binding area is connected to a first FPC, a trace in any second binding area is connected to a second FPC, and a trace in any third binding area is connected to a third FPC. A portion of the first FPC, the second FPC, and the third FPC is bound to the traces on one side of the touch layer, and another portion of the first FPC, the second FPC, and the third FPC is bound to the traces on the other side of the touch layer.

5. The display panel according to claim 4, characterized in that, The first FPC is bound to the traces on one side of the touch layer, and the second and third FPCs are bound to the traces on the other side of the touch layer.

6. The display panel according to any one of claims 1 to 5, characterized in that, The display panel also includes: A driver IC is located on the display substrate and in the peripheral area; The bonding area and the driver IC are located within the first peripheral sub-region, and are arranged alternately along the extension direction of the outer edge of the first peripheral sub-region.

7. A method for manufacturing a display panel, characterized in that, The method includes: A display substrate is provided, the display substrate having a display area and a peripheral area surrounding the display area; A touch layer is formed on the display substrate. The touch layer includes a plurality of touch electrodes and a plurality of traces. The orthographic projection of the plurality of touch electrodes on the display substrate is located in the display area, and the orthographic projection of the plurality of traces on the display substrate is located in the peripheral area. One end of each of the multiple traces is connected to the corresponding touch electrode, and the other end of each of the multiple traces is located in a plurality of bonding regions spaced apart in the middle of the touch layer. The orthographic projection of the plurality of bonding regions on the display substrate is located in a first peripheral sub-region. The first peripheral sub-region is a portion of the display area on one side of the peripheral region. The plurality of bonding regions are arranged along the extending direction of the outer edge of the first peripheral sub-region. The touch layer bonds a plurality of FPCs, including FPCs bonded to one side of the touch layer and FPCs bonded to the other side of the touch layer. A touch layer is formed on the display substrate, including: Making touch screen film; A polarizer and an optical adhesive layer are sequentially formed on the display substrate; The touch film is adhered to the optical adhesive layer to form the touch layer, and the optical adhesive layer is bonded between the polarizer and the touch layer; A polarizer and an optical adhesive layer are sequentially formed on the display substrate, including: A first notch is formed on the polarizer and the optical adhesive layer, the first notch being used to avoid the FPC located on the first side of the touch layer; The polarizer with the first notch and the optical adhesive layer are bonded to the display substrate; The optical adhesive layer is bonded to each FPC located on the second side of the touch layer, and the first side and the second side are two opposite sides of the touch layer.

8. The method according to claim 7, characterized in that, The fabrication of the touch film includes: Provide a flexible film; The touch electrode and the wiring are formed on both sides of the flexible film; A second notch is made in the portion of the flexible film corresponding to the bonding area; Bind the FPC and the trace at the second gap.

9. The method according to claim 8, characterized in that, The process of manufacturing the touch film also includes: After binding the FPC and the trace at the second notch, the portions of the flexible film on both sides of the second notch are cut off.

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