Display touch panel, display module and electronic equipment

Abstract

The embodiment of the utility model provides a display touch panel, a display module and electronic equipment, relates to the technical field of electronics, and is used for improving the yield and reliability of the display touch panel on the basis of meeting the requirement of a narrow frame. The first wire and the second wire in the display touch panel are electrically connected through the first opening, the touch wire is formed by adopting a double-wire structure, and the impedance of the touch wire can be reduced. A first opening used for connecting the first wire and the second wire is overlapped with the first isolation dam liner on projection. The line width of the first wire and the second wire at the position is not restrained by the narrow frame, the line width requirement for forming the first opening can be met, and the method is suitable for products with any frame. Moreover, the thickness of the first insulating dielectric layer at the periphery of the first isolation dam liner is relatively thin, so that the success rate of the first opening can be improved, the risk of poor electrical contact or disconnection of the first wire and the second wire at the first opening is reduced, and the yield and reliability of the display touch panel are improved.

Description

Technical Field

[0001] This application relates to the field of electronic technologies, and in particular, to a display touch panel, a display module, and an electronic device. Background Art

[0002] With the popularization of current electronic devices, the display touch panel has become the main medium for interaction between users and electronic devices. To improve the user experience, technologies such as high-resolution full screens and narrow borders have become the mainstream development directions of touch electronic devices.

[0003] Limited by the structure of the display touch panel, the touch traces for transmitting touch signals are distributed in the non-display area (border area) of the display touch panel and are led out through the border (such as the lower border) near the pad bending side of the panel. Since all touch traces converge at the lower border, the touch traces are most densely distributed at the lower border, and the width of the touch traces is the smallest. Especially after the display touch panel is further narrowed in border, the width of the touch traces will be further reduced.

[0004] To adapt to the narrow-width touch traces, the structures related to the touch traces of the display touch panel will change in a matching manner. However, the process difficulty brought by the narrow-width touch traces will affect the yield and reliability of the display touch panel, thereby affecting the touch effect of the display touch panel. Summary of the Utility Model

[0005] Embodiments of this application provide a display touch panel, a display module, and an electronic device, which are used to improve the yield and reliability of the display touch panel on the basis of meeting the narrow border requirements.

[0006] To achieve the above object, this application adopts the following technical solutions:

[0007] In a first aspect of the embodiments of the present application, a display touch panel is provided. The display touch panel includes a display area and a non-display area located around the display area. The display touch panel further includes a substrate, a first dam liner disposed on the substrate, and a touch stack. The first dam liner is disposed on the substrate and located in the non-display area. The touch stack is disposed on the substrate; the touch stack includes a first conductive layer, a first insulating dielectric layer, and a second conductive layer that are sequentially stacked on the substrate. The first insulating dielectric layer includes a first opening, and a projection of the first opening on the substrate partially lies within a projection of the first dam liner on the substrate; the first conductive layer includes a first trace located in the non-display area, the second conductive layer includes a second trace located in the non-display area, the first trace and the second trace respectively cross the first dam liner, and the second trace is connected to the first trace through the first opening. After the first trace and the second trace are electrically connected, they form a touch trace, and the touch trace can be coupled to a transmitting electrode in the touch stack, or the touch trace can also be coupled to a receiving electrode in the touch stack.

[0008] In the display touch panel provided by the embodiments of the present application, the first trace and the second trace are electrically connected through the first opening, and a double-trace structure is adopted to form the touch trace, which can reduce the impedance of the touch trace. On this basis, the first opening for connecting the first trace and the second trace overlaps with the first dam liner in projection. That is to say, the first opening is formed above and around the first dam liner. On the one hand, at the peripheral position of the first dam liner, the first trace and the second trace already extend along the direction from the display area to the edge of the display touch panel, and the line width direction of the first trace and the second trace intersects with the width direction of the border. Therefore, the line widths of the first trace and the second trace are not restricted by the narrow border and can meet the line width requirements for forming the first opening, being applicable to products with any border. On the other hand, due to the height difference of the area where the first dam liner is located relative to other positions, the thickness of the first insulating dielectric layer at the peripheral position of the first dam liner is relatively thin, which can improve the success rate of the first opening, reduce the risk of poor electrical contact or disconnection between the first trace and the second trace at the first opening, and improve the yield and reliability of the display touch panel. On the other hand, the first opening is not limited to being located above the first dam liner and can be extended to the vicinity of the first dam liner, which can reduce the process difficulty of forming the first opening and the success rate of the first opening, and is applicable to display touch panels of various sizes.

[0009] In a possible implementation, the first insulating dielectric layer further includes a second opening, which is located on the side of the first isolation dam liner away from the display area; the second trace is also connected to the first trace through the second opening. By providing the second opening around the first isolation dam liner, the connection points between the first trace and the second trace can be increased, further increasing the design redundancy, reducing the probability of poor electrical contact or disconnection at the end positions of the first trace and the second trace, and improving the yield and reliability of the display touch panel.

[0010] In a possible implementation, the display touch panel further includes a second isolation dam liner, and a part of the projection of the first opening on the substrate is located within the projection of the second isolation dam liner on the substrate. The first opening overlaps both the first isolation dam liner and the second isolation dam liner. Increasing the size of the first opening can further improve the success rate of the first opening and reduce the risk of poor electrical contact or disconnection of the first trace and the second trace at the first opening.

[0011] In a possible implementation, the display touch panel further includes a second isolation dam liner, and the first insulating dielectric layer further includes a third opening, and a part of the projection of the third opening on the substrate is located within the projection of the second isolation dam liner on the substrate; the first conductive layer further includes a third trace located in the non-display area, and the second conductive layer further includes a fourth trace located in the non-display area. The third trace and the fourth trace respectively cross the second isolation dam liner, and the fourth trace is connected to the third trace through the third opening. The first touch trace and the second touch trace in the display touch panel can also partially adopt the double-trace structure formed by the above-mentioned third trace and fourth trace. The touch traces in the display touch panel can adopt various structures to match the design requirements of different products, and have a wide range of applications.

[0012] In a possible implementation, the first trace and the second trace respectively cross the second isolation dam liner, and a part of the projection of the second opening on the substrate is located within the projection of the second isolation dam liner on the substrate. Since there is a height difference in the area where the second isolation dam liner is located compared to other positions, the thickness of the first insulating dielectric layer at the peripheral position of the second isolation dam liner is relatively thin, which can improve the success rate of the second opening, reduce the risk of poor electrical contact or disconnection of the first trace and the second trace at the second opening, and improve the yield and reliability of the display touch panel.

[0013] In a possible implementation, the side surface of the first isolation dam liner is a plane. On the one hand, this can reduce the structural difficulty of the first isolation dam liner, and on the other hand, it can improve the flatness of the first insulating dielectric layer on the side surface of the first isolation dam liner to improve the success rate of the first opening.

[0014] In a possible implementation, the first conductive layer further includes a plurality of first electrodes located in the display area; the second conductive layer further includes a plurality of second electrodes located in the display area; the projections of the second electrodes on the first conductive layer and the first electrodes are alternately arranged along a first direction and a second direction respectively, and the first direction intersects with the second direction. By arranging the first electrodes and the second electrodes in different layers, compared with arranging the first electrodes and the second electrodes in the same layer, there is no need to adopt a large number of bridging micropores design in the first insulating dielectric layer, avoiding the opening residue caused by insufficient resolution of organic materials, thereby reducing the risk of signal interruption caused by opening residue and improving the product yield.

[0015] In a possible implementation, the material of the first insulating dielectric layer includes an organic material. By using an organic material for the first insulating dielectric layer, the display touch panel can adopt an organic encapsulation on-touch integration technology, which can make full use of the deformation ability of the organic material, improve the bending and deformation ability of the display touch panel, and reduce the fracture risk of the display touch panel during a large strain or deformation process.

[0016] In a possible implementation, the touch stack further includes a second insulating dielectric layer; the second insulating dielectric layer is disposed on the side of the first conductive layer facing the substrate, and the material of the second insulating dielectric layer includes an organic material. By using an organic material for the second insulating dielectric layer, the display touch panel can adopt an organic encapsulation on-touch integration technology, which can make full use of the deformation ability of the organic material, improve the bending and deformation ability of the display touch panel, and reduce the fracture risk of the display touch panel during a large strain or deformation process.

[0017] In a second aspect of the embodiments of the present application, a display module is provided. The display module includes a display touch panel and a display driver integrated circuit. The display driver integrated circuit is connected to the display touch panel, and the display touch panel includes the display touch panel according to any one of the first aspect.

[0018] The display module provided in the second aspect of the embodiments of the present application includes the display touch panel of the first aspect. The beneficial effects of the display module are the same as those provided in the first aspect and will not be described in detail here.

[0019] In a third aspect of the embodiments of the present application, an electronic device is provided. The electronic device includes a driving controller and a display module. The driving controller is connected to the display module, and the display module includes the display module of the second aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a framework diagram of an electronic device provided by an embodiment of the present application;

[0021] Figure 2A It is a top view of a display touch panel provided by an embodiment of the present application;

[0022] Figure 2B is a cross-sectional view along the A1 - A2 direction in Figure 2A ;

[0023] Figure 2C is a cross-sectional view along the Figure 2A B1 - B2 direction in

[0024] Figure 2D is a schematic diagram of a partial structure of a display touch panel provided by an embodiment of the present application;

[0025] Figure 2E is a schematic diagram of the connection relationship between a first trace and a second trace provided by an embodiment of the present application;

[0026] Figure 2F is another schematic diagram of the connection relationship between a first trace and a second trace provided by an embodiment of the present application;

[0027] Figures 3 - 6 is another schematic diagram of a partial structure of a display touch panel provided by an embodiment of the present application;

[0028] Figure 7 and Figure 8 is a top view of a display touch panel provided by an embodiment of the present application;

[0029] Figure 9A is yet another schematic diagram of a partial structure of a display touch panel provided by an embodiment of the present application;

[0030] Figure 9B is a top view of a display touch panel provided by an embodiment of the present application;

[0031] Figure 10A and Figure 10B is a top view of a display touch panel provided by an embodiment of the present application;

[0032] Figure 11 is yet another schematic diagram of a partial structure of a display touch panel provided by an embodiment of the present application;

[0033] Figures 12 - 14 is yet another schematic diagram of a partial structure of a display touch panel provided by an embodiment of the present application;

[0034] Figure 15A is yet another schematic diagram of a partial structure of a display touch panel provided by an embodiment of the present application;

[0035] Figure 15B is a top view of a display touch panel provided by an embodiment of the present application;

[0036] Figure 16 is a top view of a display touch panel provided by an embodiment of the present application. Detailed implementation manners

[0037] Next, the technical solutions in the embodiments of the present application will be described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments.

[0038] Hereinafter, terms such as "second" and "first" are only for convenience of description, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "second", "first", etc. may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, the meaning of "a plurality" is two or more.

[0039] In addition, in the embodiments of the present application, orientation terms such as "upper", "lower", "left", "right", etc. may include but are not limited to being defined relative to the schematic placement orientation of the components in the drawings. It should be understood that these directional terms may be relative concepts, and they are used for relative description and clarification, and they may change accordingly with the change of the orientation of the components in the drawings.

[0040] In the embodiments of the present application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" may be a fixed connection, a detachable connection, or integrated; it may be directly connected, or indirectly connected through an intermediate medium. In addition, the term "connected" may be a direct electrical connection, or an indirect electrical connection through an intermediate medium. The term "contact" may be direct contact, or indirect contact through an intermediate medium.

[0041] In the embodiments of the present application, "and / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone, where A and B may be singular or plural. The character " / " generally represents an "or" relationship between the front and rear associated objects.

[0042] An embodiment of the present application provides an electronic device, which may be a foldable electronic device, for example. The electronic device may be a consumer electronic product, a home electronic product, a vehicle-mounted electronic product, or a financial electronic product. Among them, consumer electronic products such as mobile phones, tablets, laptop computers, e-readers, personal computers (PCs), personal digital assistants (PDAs), desktop monitors, smart wearable products (e.g., smart watches, smart bracelets), virtual reality (VR) electronic devices, augmented reality (AR) electronic devices, drones, etc. Home electronic products such as smart door locks, TVs, refrigerators, charging household small appliances (e.g., soymilk makers, floor cleaning robots), etc. Vehicle-mounted electronic products such as vehicle navigators, in-vehicle DVDs, etc. Financial electronic products such as ATMs, electronic devices for self-service business handling, etc.

[0043] The embodiment of the present application does not impose special restrictions on the specific form of the above-mentioned electronic device. For the convenience of description in the following embodiments, the electronic device is taken as a mobile phone as an example for illustration.

[0044] Figure 1 It is an architecture diagram of an electronic device provided by an embodiment of the present application.

[0045] As Figure 1 shown, the electronic device 1 mainly includes a display module 20, a middle frame 30, and a rear shell (or called a battery cover, a housing) 40.

[0046] The middle frame 30 is located between the display module 20 and the rear shell 40. An installation space is formed between the middle frame 30 and the rear shell 40 to accommodate electronic components such as a printed circuit board (PCB), a battery, a receiver, a speaker, a camera, etc. The PCB can integrate main controllers, storage units, antenna modules, power management modules and other electronic components of the terminal, and the battery can supply power to electronic components such as the display module 20, the circuit board, the receiver, the speaker, the camera, etc.

[0047] The display module 20 has a light-emitting side where a display screen can be seen and a back surface opposite to the light-emitting side. The rear shell 40 is located on the back surface of the display module 20. The display module 20 includes an active area (AA) and a non-display area located around the active area. The active area is used to display images, and the active area includes a plurality of sub pixels (SP).

[0048] In a possible embodiment, the display module 20 is a liquid crystal display (LCD). Based on this, the electronic device 1 further includes a backlight module (BLU) located on the back of the liquid crystal display. The backlight module can provide a light source for the liquid crystal display so that each sub-pixel in the liquid crystal display can emit light to achieve image display.

[0049] In another possible embodiment, the display module 20 is a self-luminous display module such as an organic light-emitting diode (OLED) display module, an active-matrix organic light-emitting diode (AMOLED) display module, a mini organic light-emitting diode (Mini-OLED) display module, a micro light-emitting diode (Micro-LED) display module, a micro organic light-emitting diode (Micro-OLED) display module, a quantum dot light emitting diodes (QLED) display module, etc. At this time, the display module 20 can be a rigid display module, and the display module 20 can also be a flexible display module.

[0050] In some embodiments, the display module 20 includes a display panel and a display driver integrated circuit (DDIC). The electronic device 1 further includes a driving controller, which is connected to the display driver integrated circuit. The display driver integrated circuit receives the signal output by the driving controller and provides a display signal for the display panel. The driving controller includes, for example, a system on chips (SOC).

[0051] In some embodiments, the display module 20 is a display module with a touch function. The display panel included in the display module 20 is also a display panel with a touch function. The electronic device 1 further includes a touch panel driver integrated circuit (TPIC), which is used to transmit touch signals.

[0052] Figure 2A A top view of a display touch panel provided by an embodiment of this application.Figure 2B is a cross-sectional view along the Figure 2A A1 - A2 direction in Figure 2C is a cross-sectional view along the Figure 2A B1 - B2 direction in Figure 2D This is a schematic diagram of a partial structure of a display touch panel provided by an embodiment of the present application. Figure 2E This is a schematic diagram of the connection relationship between a first trace and a second trace provided by an embodiment of the present application, Figure 2F and this is another schematic diagram of the connection relationship between a first trace and a second trace provided by an embodiment of the present application.

[0053] As Figure 2A shown, the display touch panel 10 includes a display area AA and a non - display area BB located around the display area.

[0054] The display touch panel 10 includes a substrate 19 and a touch stack disposed on the substrate 19. The touch stack includes a plurality of first electrodes 111, a plurality of second electrodes 121, a plurality of first touch traces T1, and a plurality of second touch traces T2.

[0055] The plurality of first electrodes 111 and the plurality of second electrodes 121 are disposed on one side of the substrate 19 and within the display area AA. The first electrodes 111 and the second electrodes 121 are alternately arranged along a first direction Y and a second direction X respectively, and the first direction Y intersects (for example, is perpendicular to) the second direction X. The first electrode 111 and the second electrode 121 are used to output touch signals when a touch operation is detected and transmit signals to a touch driving integrated circuit.

[0056] The plurality of first electrodes 111 and the plurality of second electrodes 121 are located in the same layer. The second electrodes 121 are directly connected in contact with each other, and the first electrodes 111 are connected through cross - bridges disposed in a different layer. A first insulating dielectric layer ( Figure 2A not shown in

[0057] is provided between the layer where the cross - bridges are located and the layer where the first electrodes 111 are located), and the cross - bridges pass through vias on the first insulating dielectric layer to connect with the first electrodes 111.

[0058] The plurality of first touch traces T1 and the plurality of second touch traces T2 are on the same side of the substrate 19 as the first electrodes 111 and the second electrodes 121 and within the non - display area BB. The plurality of first touch traces T1 are correspondingly connected to the plurality of first electrodes 111, and the plurality of second touch traces T2 are correspondingly connected to the plurality of second electrodes 121.

[0059] The first electrode 111 and the second electrode 121 serve as the emitting electrode and the receiving electrode respectively, and the first touch trace T1 and the second touch trace T2 serve as the emitting touch trace and the receiving touch trace respectively.

[0060] As Figure 2B shown in the figure, the display touch panel 10 further includes a display stack DP, a packaging layer IJP, a first dam DAM1, and a second dam DAM2. The display stack DP is disposed between the touch stack TP and the substrate 19. The packaging layer IJP is disposed between the display stack DP and the touch stack TP, and the packaging layer IJP at least covers the portion of the display stack DP located in the display area AA. As Figure 2A shown in the figure, the first dam DAM1 is disposed in the non-display area BB and is disposed around the display area AA in a circle. The second dam DAM2 is disposed outside the first dam DAM1 and is disposed around the first dam DAM1 in a circle.

[0061] As Figure 2B shown in the figure, taking the first touch trace T1 as an example, the first touch trace T1 includes a first trace T11 and a second trace T12. The second trace T12 and the first electrode 111 and the second electrode 121 are located on the same layer, and the first trace T11 and the cross-bridge are located on the same layer. A first insulating dielectric layer 13 is provided between the first trace T11 and the second trace T12. As Figure 2C shown in the figure, by forming a fourth opening 131 on the first insulating dielectric layer 13, electrical conduction between the first trace T11 and the second trace T12 is achieved. By adopting such a double-layer trace structure for the touch trace, the impedance of the touch trace can be reduced. The second touch trace T2 can also adopt a double-layer trace structure.

[0062] The packaging layer IJP is an organic packaging layer formed by an inkjet printing technology, and this packaging layer IJP will level out in front of the first dam DAM1 at the edge of the display touch panel 10. As Figure 2B shown in the figure, the first touch trace T1 and the second touch trace T2 need to be at a certain distance inside the first dam DAM1 to ensure that the first touch trace T1 and the second touch trace T2 are in the flat area of the packaging layer IJP. However, due to the limitation of the narrow bezel, the space reserved for the first touch trace T1 and the second touch trace T2 is relatively small, and the line width of the first touch trace T1 and the second touch trace T2 in the concentrated lead-out area ( Figure 2A the area circled by the dotted line in the figure) is the smallest. As the screen size and the touch resolution increase, the number of the first touch trace T1 and the second touch trace T2 increases, but the size of the bezel is limited, resulting in a further reduction in the line width of the first touch trace T1 and the second touch trace T2.

[0063] Limited by the border size (the size in the first direction Y), the single-wire width of the first touch trace T1 and the second touch trace T2 in the lower border area is usually smaller than the width of the smallest achievable opening. As a result, in the lower border area, the width of the portion of the first touch trace T1 and the second touch trace T2 extending along the second direction X is insufficient to form an opening, and an opening can only be formed at the portion extending along the first direction Y.

[0064] Therefore, as Figure 2D shown, at the outlet of the lower border, the first trace T11 and the second trace T12 only have a fourth opening 131 at the end position, and there is no other electrical connection in the middle. The fourth opening 131 at the end is located on the side of the first isolation dam DAM1 away from the second isolation dam DAM2 (towards the display area AA side).

[0065] In some embodiments, a second insulating dielectric layer 14 and a second chemical vapor deposition (CVD) layer CVD2 are further provided under the first trace T11. The film layer structure under the first trace T11 is only a schematic illustration and is not subject to any limitation.

[0066] As Figure 2E shown, under normal circumstances, the first trace T11 and the second trace T12 are electrically connected at the end position. However, when forming the fourth opening 131 on the first insulating dielectric layer 13 between the first trace T11 and the second trace T12, due to process problems during the photolithography development or etching process, the dielectric layer may remain at the fourth opening 131, as Figure 2F shown, resulting in poor electrical contact or disconnection between the first trace T11 and the second trace T12 at the fourth opening 131. Then, on the long section of the trace between the disconnection of the fourth opening 131 and the connection of the next fourth opening 131, the touch signal changes from double-layer conduction to single-layer conduction, increasing the impedance of the corresponding touch trace and deteriorating the touch capacitance, affecting the yield, touch performance, and reliability of the display touch panel 10.

[0067] The embodiment of the present application further provides a display touch panel 10, which is used to reduce the probability of poor electrical contact or disconnection between the first trace T11 and the second trace T12 on the side where the panel bending area is located, and improve the yield and reliability of the display touch panel 10.

[0068] Figures 3 - 6 It is a schematic diagram of a partial structure of another display touch panel provided by the embodiment of the present application. Figure 7 and Figure 8 is a top view of a display touch panel provided by the embodiment of the present application.

[0069] As Figure 3As shown, the display touch panel 10 includes a display area AA and a non-display area BB located around the display area. The display touch panel 10 includes a substrate 19, a display stack DP, a packaging layer IJP, a second chemical vapor deposition layer CVD2, a touch stack TP, and a first dam DAM1.

[0070] In the embodiments of the present application, the specific structure of the film layers in the display stack DP is not limited, and the stack structures that can achieve the display function in the related art are applicable to the embodiments of the present application.

[0071] Exemplarily, the display stack DP includes a circuit layer, a planarization layer (PLN), a pixel define layer (PDL), a light-emitting device, and a first chemical vapor deposition layer CVD1. The circuit layer is used to form pixel circuits, driving circuits, and display traces such as gate lines and data lines. The display traces can extend to the non-display area BB, for example. The planarization layer PLN is, for example, a planarization layer formed of an organic material. The first chemical vapor deposition layer CVD1 is used for water and oxygen barrier. The light-emitting device is located in the sub-pixel opening area defined by the pixel define layer PDL.

[0072] The first dam DAM1 and the display stack DP are on the same side of the substrate 19 and are located in the non-display area BB. The first dam DAM1 is arranged in a circle around the display area AA and is arranged on the side of the circuit layer in the display stack DP away from the substrate 19.

[0073] In some embodiments, the first dam DAM1 includes, for example, a first dam liner DAM1-1. The first dam liner DAM1-1 is the lowest raised structure in the first dam DAM1. Exemplarily, the first dam DAM1 further includes a first covering layer DAM1-2 and a second covering layer DAM1-3 that sequentially cover the surface of the first dam liner DAM1-1. In the embodiments of the present application, the structure of the first dam DAM1 is not limited, and it can be adjusted adaptively in combination with the structure of the display stack DP.

[0074] Exemplarily, the first dam liner DAM1-1 is formed synchronously with the planarization layer PLN, the first covering layer DAM1-2 is formed synchronously with the pixel define layer PDL, and the second covering layer DAM1-3 is formed synchronously with the first chemical vapor deposition layer CVD1 to simplify the manufacturing process of the display touch panel 10.

[0075] In some embodiments, the first dam liner DAM1-1 is a single-layer structure. For example, the side surface of the first dam liner DAM1-1 intersecting with the substrate 19 is a plane, rather than a stepped shape. Here, the plane can be a straight surface, a straight surface with a chamfer, or a curved surface with a certain curvature, etc., as long as it is a continuous and smooth plane.

[0076] On the one hand, this can reduce the structural complexity of the first isolation dam liner DAM1-1. On the other hand, it can improve the flatness of the first insulating dielectric layer 13 on the side of the first isolation dam liner, so as to improve the success rate of the first opening 132.

[0077] The encapsulation layer IJP is disposed on the side of the display stack DP away from the substrate 19. The encapsulation layer IJP covers the part of the display stack DP located within the display area AA, and the part of the non-display area BB located on the side of the first isolation dam DAM1 facing the display area AA.

[0078] The second chemical vapor deposition layer CVD2 is disposed on the side of the encapsulation layer IJP away from the substrate 19. The second chemical vapor deposition layer CVD2 covers the encapsulation layer IJP and the first isolation dam DAM1. The second chemical vapor deposition layer CVD2 extends to the edge of the substrate 19 to block water and oxygen for the display stack DP. The material of the second chemical vapor deposition layer CVD2 is, for example, an inorganic insulating material.

[0079] The touch stack TP is disposed on the side of the second chemical vapor deposition layer CVD2 away from the substrate 19. Exemplarily, the touch stack TP includes a first conductive layer 11, a first insulating dielectric layer 13, and a second conductive layer 12 that are sequentially stacked on the substrate 19. For example, the touch stack TP further includes a second insulating dielectric layer 14 and a touch protection layer 15. The second insulating dielectric layer 14 is disposed on the side of the first conductive layer 11 facing away from the first insulating dielectric layer 13, and the touch protection layer 15 is disposed on the side of the second conductive layer 12 away from the first insulating dielectric layer 13.

[0080] The first conductive layer 11 and the second conductive layer 12 serve as touch conductive layers. The materials of the first conductive layer 11 and the second conductive layer 12 can be metals or indium tin oxide (ITO), etc. The first conductive layer 11 can be a single-layer structure, and the first conductive layer 11 can also be a stacked structure. Similarly, the second conductive layer 12 can be a single-layer structure, and the second conductive layer 12 can also be a stacked structure.

[0081] The first insulating dielectric layer 13 is used for electrically isolating the first conductive layer 11 and the second conductive layer 12. The second insulating dielectric layer 14 can be used as a planarization layer, for example. The materials of the first insulating dielectric layer 13 and the second insulating dielectric layer 14 can be inorganic materials.

[0082] In some embodiments, the first insulating dielectric layer 13 or the second insulating dielectric layer 14 employs a coated organic material (organic coating, OC). Exemplarily, the materials of the first insulating dielectric layer 13 or the second insulating dielectric layer 14 include organic materials such as silicone resin or epoxy resin.

[0083] The first insulating dielectric layer 13 or the second insulating dielectric layer 14 is made of an organic material. The display touch panel 10 can adopt the touch on encapsulation (TOE) technology, which can make full use of the deformation ability of the organic material to improve the bending and deformation ability of the display touch panel 10 and reduce the fracture risk of the display touch panel 10 during large strain or deformation processes.

[0084] The first insulating dielectric layer 13 includes a first opening 132, and a part of the projection of the first opening 132 on the substrate 19 is located within the projection of the first dam liner DAM1-1 on the substrate 19.

[0085] Exemplarily, as Figure 3 and Figure 4 shown, the first opening 132 overlaps with the first dam liner DAM1-1.

[0086] Alternatively, exemplarily, as Figure 5 and Figure 6 shown, the first opening 132 straddles the first dam liner DAM1-1.

[0087] In the embodiments of the present application, the shape of the first opening 132 is not limited, and the projection of the first opening 132 can be any closed figure. The first opening 132 can be a straight through opening or a stepped through opening.

[0088] As Figure 3 shown, the first conductive layer 11 includes a first trace T11 located in the non-display area BB. The second conductive layer 12 includes a second trace T12 located in the non-display area BB. The first trace T11 and the second trace T12 respectively straddle the first dam DAM1, and the second trace T12 is connected to the first trace T11 through the first opening 132 to form a double-layer structure of touch traces.

[0089] A group of connected first traces T11 and second traces T12 constitutes a first touch trace T1 or a second touch trace T2. The display touch panel 10 includes multiple first touch traces T1 and multiple second touch traces T2. The multiple first touch traces T1 are correspondingly connected to multiple first electrodes 111, and the multiple second touch traces T2 are correspondingly connected to multiple second electrodes 121.

[0090] In the embodiments of the present application, the lengths of the first trace T11 and the second trace T12 are not limited. For example, the second trace T12 can be retracted relative to the first trace T11.

[0091] In some embodiments, as Figure 3 shown, the first conductive layer 11 further includes multiple first electrodes 111 and multiple second electrodes 121. As Figure 7As shown, a plurality of first electrodes 111 and a plurality of second electrodes 121 are located in the display area AA. The first electrodes 111 and the second electrodes 121 are alternately arranged along a first direction Y and a second direction X respectively, and the first direction Y intersects (for example, is perpendicular to) the second direction X.

[0092] The second electrodes 121 are directly connected in contact with each other, and the first electrodes 111 are connected through cross-bridges arranged in different layers. A first insulating dielectric layer (not shown in the figure) is provided between the layer where the cross-bridges are located and the layer where the first electrodes 111 are located, and the cross-bridges pass through vias in the first insulating dielectric layer to be connected to the first electrodes 111.

[0093] The first electrodes 111 are connected to the first touch traces T1, and the second electrodes 121 are connected to the second touch traces T2. As Figure 3 shown, the first touch trace T1 includes a connected first trace T11 and a second trace T12. The first trace T11 is connected to the first electrode 111, and the second trace T12 is connected to the first trace T11 through a first opening 132. The second trace T12 is in the same layer as the cross-bridge.

[0094] Similarly, the second touch trace T2 also includes a connected first trace T11 and a second trace T12. At this time, the first trace T11 is coupled to the second electrode 121, and the second trace T12 is connected to the first trace T11 through a first opening 132. The second trace T12 is in the same layer as the cross-bridge.

[0095] The first electrodes 111 and the second electrodes 121 are alternately arranged along the first direction Y and the second direction X respectively, and the second electrodes 121 and the first electrodes 111 are mutually interlocked and arranged in a checkerboard pattern.

[0096] In some other embodiments, as Figure 5 shown, the first conductive layer 11 further includes a plurality of first electrodes 111 ( Figure 5 only one first electrode 111 is schematically shown in the figure), and the second conductive layer 12 further includes a plurality of second electrodes 121. As Figure 8 shown, a plurality of first electrodes 111 and a plurality of second electrodes 121 are located in the display area AA. The projections of the second electrodes 121 on the first conductive layer 11 and the first electrodes 111 are alternately arranged along the first direction Y and the second direction X respectively, and the first direction Y intersects (for example, is perpendicular to) the second direction X.

[0097] The first electrodes 111 and the second electrodes 121 are arranged in different layers. The first electrodes 111 are directly connected in contact with each other, and the second electrodes 121 are directly connected in contact with each other.

[0098] The first electrodes 111 are connected to the first touch traces T1, and the second electrodes 121 are connected to the second touch traces T2. As Figure 5As shown, the first touch trace T1 includes a connected first trace T11 and a second trace T12. The first trace T11 is connected to the first electrode 111, and the second trace T12 is connected to the first trace T11 through the first opening 132.

[0099] Similarly, the second touch trace T2 also includes a connected first trace T11 and a second trace T12. At this time, the second trace T12 is coupled to the second electrode 121, and the second trace T12 is connected to the first trace T11 through the first opening 132.

[0100] By arranging the first electrode 111 and the second electrode 121 in different layers, compared with arranging the first electrode 111 and the second electrode 121 in the same layer, there is no need to adopt a large number of bridge micropore designs in the first insulating dielectric layer 13, avoiding the risk of opening residue caused by insufficient resolution of organic materials, thereby reducing the risk of signal interruption caused by opening residue and improving the product yield.

[0101] The first isolation dam DAM1 can be arranged, for example, around the display area AA in a circle, or the first isolation dam DAM1 can also not be arranged around the display area AA in a circle, but is spliced by multiple sections of isolation dams, and the multiple sections of isolation dams enclose an annular isolation dam gasket. The structure in the embodiments of the present application Figure 7 is only a schematic illustration.

[0102] In the display touch panel 10 provided by the embodiments of the present application, a double-trace structure is adopted to form the touch trace, which can reduce the impedance of the touch trace. On this basis, the first opening 132 for connecting the first trace T11 and the second trace T12 overlaps with the first isolation dam gasket DAM1-1 in projection. That is to say, the first opening 132 is formed above and around the first isolation dam gasket DAM1-1. On the one hand, at the peripheral position of the first isolation dam gasket DAM1-1, the second trace T12 has extended along the first direction Y, and the line width of the second trace T12 is no longer restricted by the narrow border, which can meet the line width requirements for forming the first opening 132 and is applicable to any product. On the other hand, due to the height difference of the area where the first isolation dam gasket DAM1-1 is located relative to other positions, the thickness of the first insulating dielectric layer 13 at the peripheral position of the first isolation dam gasket DAM1-1 is relatively thin, which can improve the success rate of the first opening 132, reduce the risk of poor electrical contact or disconnection between the first trace T11 and the second trace T12 at the first opening 132, and improve the yield and reliability of the display touch panel 10. On the other hand, the first opening 132 is not limited to being located above the first isolation dam gasket DAM1-1 and can be extended to the vicinity of the first isolation dam gasket DAM1-1, which can reduce the process difficulty of forming the first opening 132 and the success rate of the first opening 132 and is applicable to display touch panels 10 of various sizes.

[0103] Figure 9AAnother partial structural schematic diagram of the display touch panel provided by the embodiment of the present application. Figure 9B A top view of a display touch panel provided by the embodiment of the present application.

[0104] As Figure 9A shown, the first insulating dielectric layer 13 further includes a second opening 133, and the second trace T12 is also connected to the first trace T11 through the second opening 133. As Figure 9B shown, the projection of the second opening 133 on the substrate 19 is located on the side of the first dam liner DAM1-1 away from the display area AA. The embodiment of the present application does not limit the contour shape of the second opening 133, and it can be a closed figure of any shape.

[0105] By providing the second opening 133 around the periphery of the first dam liner DAM1-1, the connection points between the first trace T11 and the second trace T12 can be increased, further increasing the design redundancy, reducing the probability of poor electrical contact or disconnection at the end positions of the first trace T11 and the second trace T12, and improving the yield and reliability of the display touch panel 10.

[0106] Figure 10A and Figure 10B A top view of a display touch panel provided by the embodiment of the present application.

[0107] In some embodiments, as Figure 10A shown, the display touch panel 10 further includes a second dam DAM2.

[0108] Exemplarily, as Figure 10A shown, the second dam DAM2 is located outside the periphery of the first dam DAM1 away from the display area AA. For example, the second dam DAM2 is arranged around the first dam DAM1 in a circle, and the second dam DAM2 may also not be arranged around the first dam DAM1 in a circle. Along the thickness direction of the display touch panel 10, the size of the second dam DAM2 may be larger than the size of the first dam DAM1.

[0109] Or, exemplarily, as Figure 10B shown, the second dam DAM2 is located in the inner circle of the first dam DAM1 close to the display area AA. For example, the first dam DAM1 is arranged around the second dam DAM2 in a circle. Along the thickness direction of the display touch panel 10, the size of the second dam DAM2 may be smaller than the size of the first dam DAM1. As Figure 10B shown, the first openings 132 in the display touch panel 10 may be located in the same row or may be offset. The embodiment of the present application does not limit this.

[0110] The display touch panel 10 may further include a plurality of second dams DAM2 disposed around the display area AA, which is not limited in the embodiments of the present application.

[0111] By providing a plurality of dams, when the encapsulation layer material overflows the inner dam (such as the first dam DAM1), the outer dam (such as the second dam DAM2) can further play an isolation role.

[0112] Figure 11 It is a partial structural schematic diagram of another display touch panel provided by the embodiments of the present application.

[0113] In some embodiments, as Figure 11 shown, the second dam DAM2 includes a second dam liner DAM2-1, and the second dam liner DAM2-1 may be formed synchronously with the first dam liner DAM1-1, for example. Exemplarily, the second dam DAM2 further includes a third covering layer DAM2-2 and a fourth covering layer DAM2-3 that are sequentially covered on the surface of the second dam liner DAM2-1. The third covering layer DAM2-2 may be formed synchronously with the first covering layer DAM1-2, for example, and the fourth covering layer DAM2-3 may be formed synchronously with the second covering layer DAM1-3, for example.

[0114] Exemplarily, the second dam liner DAM2-1 may be a single-layer structure, for example. For example, the side surface of the second dam liner DAM2-1 is a plane, rather than a stepped shape. Here, the plane may be a straight surface, a straight surface with a chamfer, or a curved surface with a certain curvature, etc., as long as it is a continuous and smooth plane.

[0115] The structure of the second dam DAM2 provided by the embodiments of the present application is only a schematic illustration and is not subject to any limitation.

[0116] In some embodiments, the first trace T11 and the second trace T12 respectively cross the second dam liner DAM2-1, and the projection of the second opening 133 on the substrate 19 is located within the projection of the second dam liner DAM2-1 on the substrate 19.

[0117] In other embodiments, as Figure 11 shown, the first trace T11 and the second trace T12 respectively cross the second dam liner DAM2-1, and a part of the projection of the second opening 133 on the substrate 19 is located within the projection of the second dam liner DAM2-1 on the substrate 19.

[0118] The structural relationship between the second opening 133 and the second dam liner DAM2-1 may refer to the relevant description of the structural relationship between the first opening 132 and the first dam liner DAM1-1 above, and will not be elaborated here.

[0119] Since there is a height difference in the area where the second isolation dam liner DAM2-1 is located relative to other positions, the thickness of the first insulating dielectric layer 13 at the positions around the second isolation dam liner DAM2-1 is relatively thin, which can improve the success rate of the second opening 133, reduce the risk of poor electrical contact or disconnection between the first trace T11 and the second trace T12 at the second opening 133, and improve the yield and reliability of the display touch panel 10.

[0120] Figures 12 - 14 This is another partial structural schematic diagram of the display touch panel provided by the embodiment of the present application.

[0121] In some embodiments, as Figure 12 shown, the display touch panel 10 further includes a second isolation dam DAM2, and a part of the projection of the first opening 132 on the substrate 19 is located within the projection of the second isolation dam liner DAM1-21 on the substrate 19.

[0122] Exemplarily, as Figure 12 shown, the display touch panel 10 includes a second isolation dam DAM2, the first opening 132 overlaps with the second isolation dam DAM2, and the display touch panel 10 does not include the above-mentioned second opening 133.

[0123] Or, exemplarily, as Figure 13 shown, the display touch panel 10 includes a second isolation dam DAM2, the first opening 132 straddles the second isolation dam DAM2, and the display touch panel 10 does not include the above-mentioned second opening 133.

[0124] Or, exemplarily, as Figure 14 shown, the display touch panel 10 includes a second isolation dam DAM2, the first opening 132 overlaps with the second isolation dam DAM2, and the display touch panel 10 includes the above-mentioned second opening 133. The second opening 133 can overlap with the second isolation dam DAM2, and the projection of the second opening 133 on the substrate 19 can also be located on the side of the second isolation dam DAM2 away from the first isolation dam DAM1.

[0125] The first opening 132 overlaps with both the first isolation dam liner DAM1-1 and the second isolation dam liner DAM2-1. Increasing the size of the first opening 132 can further improve the success rate of the first opening 132 and reduce the risk of poor electrical contact or disconnection between the first trace T11 and the second trace T12 at the first opening 132.

[0126] Figure 15A This is another partial structural schematic diagram of the display touch panel provided by the embodiment of the present application, Figure 15B This is a top view of the display touch panel provided by the embodiment of the present application.

[0127] In some embodiments, as Figure 15A shown, the first conductive layer 11 further includes a third trace T13 located in the non-display area BB, and the second conductive layer 12 further includes a fourth trace T14 located in the non-display area BB. The third trace T13 and the fourth trace T14 respectively cross the second dam pad DAM2-1. The first insulating dielectric layer 13 further includes a third opening 134. As Figure 15B shown, a part of the projection of the third opening 134 on the substrate 19 is located within the projection of the second dam pad DAM2-1 on the substrate 19. The fourth trace T14 is connected to the third trace T13 through the third opening 134.

[0128] The connected third trace T13 and fourth trace T14 can, for example, form the above-mentioned first touch trace T1 or the above-mentioned second touch trace T2. Figure 15A Taking the third trace T13 and the fourth trace T14 forming the second touch trace T2 as an example for illustration.

[0129] For the structural relationship between the third opening 134 and the second dam pad DAM2-1, reference can be made to the relevant description of the structural relationship between the first opening 132 and the first dam pad DAM1-1 above, which will not be elaborated here.

[0130] In the embodiments of the present application, the first touch trace T1 and the second touch trace T2 in the display touch panel 10 can both adopt the double-trace structure formed by the above-mentioned first trace T11 and second trace T12. The first touch trace T1 and the second touch trace T2 in the display touch panel 10 can also both adopt the double-trace structure formed by the third trace T13 and the fourth trace T14. The first touch trace T1 and the second touch trace T2 in the display touch panel 10 can also partly adopt the double-trace structure formed by the above-mentioned first trace T11 and second trace T12, and partly adopt the double-trace structure formed by the third trace T13 and the fourth trace T14. The touch traces in the display touch panel 10 can adopt various structures to match the design requirements of different products, and have a wide range of applications.

[0131] In some embodiments, as Figure 15A shown, the first trace T11 and the second trace T12 are located between the first dam pad DAM1-1 and the display area AA, and no interconnection opening is provided in the part extending along the second direction X.

[0132] When the border of the display touch panel 10 is narrow enough, the first trace T11 and the second trace T12 are located between the first dam liner DAM1-1 and the display area AA, and the length of the part extending along the second direction X becomes smaller and smaller, without enough width to accommodate the opening, so the interconnection opening is not provided. Due to the existence of the first opening 132, the electrical connection can still be realized for the part of the first trace T11 and the second trace T12 located in the lower border part.

[0133] Figure 16 It is a top view of a display touch panel provided by an embodiment of the present application.

[0134] In some embodiments, as Figure 16 shown, the first insulating dielectric layer 13 further includes a fourth opening 131, and the projection of the fourth opening 131 on the substrate 19 is located on the side of the first dam liner DAM1-1 facing the display area AA. The first trace T11 and the second trace T12 are also electrically connected through the fourth opening 131.

[0135] By increasing the number of interconnection openings in the lower border area, redundant design can be increased, the probability of poor contact or disconnection between the first trace T11 and the second trace T12 can be reduced, and the yield and reliability of the display touch panel 10 can be improved.

[0136] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any change or replacement within the technical scope disclosed in the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A display touch panel, characterized in that: The display touch panel includes a display area and a non-display area located around the display area; substrate; A first isolation dam pad is disposed on the substrate and located in the non-display area; A touch stack is disposed on the substrate; the touch stack comprises a first conductive layer, a first insulating medium layer and a second conductive layer sequentially stacked on the substrate; The first insulating dielectric layer includes a first opening, and a projection of the first opening on the substrate is partially located within a projection of the first isolation dam pad on the substrate; the first conductive layer includes a first routing line located in the non-display area, and the second conductive layer includes a second routing line located in the non-display area, the first routing line and the second routing line respectively cross the first isolation dam pad, and the second routing line is connected to the first routing line through the first opening.

2. The display touch panel according to claim 1, characterized in that: The first insulating dielectric layer further includes a second opening, a projection of the second opening on the substrate being located on a side of the first isolation dam pad away from the display area; the second wiring is also connected to the first wiring through the second opening.

3. The display touch panel according to claim 1 or 2, characterized in that: The display touch panel further includes a second isolation dam liner, and a projection of the first opening on the substrate is partially located within a projection of the second isolation dam liner on the substrate.

4. The display touch panel according to claim 1 or 2, characterized in that: The display touch panel further includes a second isolation dam liner, the first insulating dielectric layer further includes a third opening, and a projection of the third opening on the substrate is partially located within a projection of the second isolation dam liner on the substrate; The first conductive layer further includes a third routing line located in the non-display area, and the second conductive layer further includes a fourth routing line located in the non-display area. The third routing line and the fourth routing line respectively cross the second isolation dam pad, and the fourth routing line is connected to the third routing line through the third opening.

5. The display touch panel according to claim 3 or 4, characterized in that: When the first insulating dielectric layer further includes a second opening, the first routing line and the second routing line respectively cross the second isolation dam liner, and a projection of the second opening on the substrate is partially located within a projection of the second isolation dam liner on the substrate.

6. The display touch panel according to any one of claims 1 to 5, characterized in that: The first isolation dam pad is located at the periphery of the display area.

7. The display touch panel according to any one of claims 1 to 6, characterized in that: The side surface of the first isolation dam liner is a plane.

8. The display touch panel according to any one of claims 1 to 7, characterized in that: The first conductive layer also includes a plurality of first electrodes located in the display area; the second conductive layer also includes a plurality of second electrodes located in the display area; the projections of the second electrodes on the first conductive layer and the first electrodes are arranged alternately along a first direction and a second direction respectively, and the first direction intersects with the second direction.

9. The display touch panel according to any one of claims 1 to 8, characterized in that: The material of the first insulating dielectric layer includes organic material.

10. The display touch panel according to any one of claims 1 to 9, characterized in that: The touch stack further includes a second insulating dielectric layer; The second insulating dielectric layer is disposed on a side of the first conductive layer facing the substrate, and the material of the second insulating dielectric layer includes an organic material.

11. A display module, characterized in that: The display module comprises a display touch panel and a display driver integrated circuit, the display driver integrated circuit is connected to the display touch panel, and the display touch panel comprises the display touch panel according to any one of claims 1 to 10.

12. An electronic device, characterized in that: The electronic device comprises a driving controller and a display module, wherein the driving controller is connected to the display module, and the display module comprises the display module according to claim 11.

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