Touch panel and display device

Abstract

The invention discloses a touch panel and a display device. The touch panel comprises a display substrate, a display circuit board, a cover adhesive tape and a touch circuit board, the touch circuit board comprises a main body part, the cover adhesive tape comprises a first insulating layer and a conductive layer which are stacked, the first insulating layer is far away from the display substrate compared with the conductive layer, and the cover adhesive tape is provided with at least one first opening; the first opening exposes a part of the conductive layer; the main body part comprises a first protection layer and a first circuit layer which are stacked, the first protection layer is closer to the display substrate than the first circuit layer, and the first circuit layer comprises a grounding wire; the main body part is provided with at least one second opening, and the second opening exposes at least part of the grounding wire; the touch panel further comprises at least one first connecting layer, a part of the first connecting layer is located in the first opening, a part of the first connecting layer is located in the second opening, the conductive layer is connected with the grounding wire through the first connecting layer, and the touch performance can be improved.

Description

Technical Field

[0001] This document relates to, but is not limited to, the field of display technology, and particularly relates to a touch panel and a display device. Background Art

[0002] Touch technology is a technology that realizes control operations through touch. With the rapid development of display technology, touch technology has been applied to various electronic devices and various fields, and is increasingly popular among users. According to the working principle, touch screens can be divided into: capacitive, resistive, infrared, surface acoustic wave, electromagnetic, and vibration wave induction types, etc.

[0003] Organic Light-Emitting Diode (OLED) displays have been widely used in smartphones, TVs, and other intelligent devices due to their high contrast ratio, thin design, and flexibility. However, OLED displays may generate electromagnetic interference during operation, and this interference may affect the performance of the touch screen. Summary of the Invention

[0004] Embodiments of the present disclosure provide a touch panel and a display device, which can avoid electromagnetic interference caused by a display substrate to the touch performance of the touch panel, and increase the grounding of a touch circuit board, thereby improving the touch performance of the touch panel.

[0005] On the one hand, embodiments of the present disclosure provide a touch panel, including a display substrate, a display circuit board, a cover tape, and a touch circuit board located on the display substrate, and the cover tape is located between the display circuit board and the touch circuit board. The touch circuit board includes a main body portion, and the display circuit board is closer to the display substrate than the main body portion; the cover tape includes a first insulating layer and a conductive layer stacked, and the first insulating layer is farther from the display substrate than the conductive layer. The cover tape has at least one first opening, and the first opening is recessed from the side of the first insulating layer far from the display substrate towards the side close to the display substrate, and the first opening exposes a part of the conductive layer;

[0006] The main body portion includes a first protective layer and a first circuit layer stacked, and the first protective layer is closer to the display substrate than the first circuit layer. The first circuit layer includes a ground wire; the main body portion has at least one second opening, and the second opening is recessed from the side of the first protective layer close to the display substrate towards the side far from the display substrate, and the second opening exposes at least a part of the ground wire;

[0007] The touch panel further includes at least one first connection layer, a part of the first connection layer is located within the first opening, and a part of the first connection layer is located within the second opening, and the conductive layer and the ground wire are connected via the first connection layer.

[0008] In some exemplary embodiments, a positive projection of the first opening and the second opening on a plane where the display substrate is located at least partially overlap.

[0009] In some exemplary embodiments, a positive projection of the first opening on a plane where the display substrate is located includes a positive projection of the second opening on a plane where the display substrate is located.

[0010] In some exemplary embodiments, a positive projection of the first connection layer on a plane where the display substrate is located includes a positive projection of the first opening on a plane where the display substrate is located.

[0011] In some exemplary embodiments, the cover tape further includes a second insulating layer, and the second insulating layer and the first insulating layer are respectively located on opposite sides of the conductive layer; the cover tape has at least one third opening, the third opening is recessed from a side of the second insulating layer close to the display substrate towards a side away from the display substrate, and a part of the conductive layer is exposed by the third opening;

[0012] The display circuit board includes a base material layer and a conductive region located on at least one side of the base material layer; the touch panel further includes at least one second connection layer, and at least a part of the second connection layer is located within the third opening, and the conductive layer and the conductive region are connected via the second connection layer.

[0013] In some exemplary embodiments, a positive projection of the third opening on a plane where the display substrate is located includes positive projections of the second connection layer and the conductive region on a plane where the display substrate is located.

[0014] In some exemplary embodiments, the display circuit board includes a first conductive layer, the base material layer, and a second conductive layer which are stacked, the first conductive layer includes a first conductive region, the second conductive layer includes a second conductive region, and the first conductive region is closer to the display substrate than the second conductive region;

[0015] The conductive layer and the second conductive region are connected via the second connection layer, and the first conductive region is connected to the display substrate.

[0016] In some exemplary embodiments, the touch panel further includes at least one third connection layer, and at least a part of the third connection layer is located within the third opening. The orthographic projection of the third connection layer and the second connection layer in the plane where the display substrate is located does not overlap, and the conductive layer is connected to the display substrate via the third connection layer.

[0017] In some exemplary embodiments, the cover tape has two of the third openings, and the two third openings are respectively located at opposite ends of the cover tape; the touch panel includes two of the second connection layers and two of the third connection layers, and one third opening, one second connection layer, and one third connection layer are set in a group.

[0018] On the other hand, embodiments of the present disclosure provide a display device including the touch panel according to any one of the foregoing embodiments.

[0019] Other features and advantages of the present application will be described in the subsequent specification, and part of them will become obvious from the specification, or will be understood by implementing the present application. Other advantages of the present application can be realized and obtained through the solutions described in the specification and the drawings. Description of the Drawings

[0020] The drawings are used to provide an understanding of the technical solutions of the present application, and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solutions of the present application and do not constitute a limitation to the technical solutions of the present application.

[0021] Figure 1 It is a schematic structural diagram of a touch panel;

[0022] Figure 2 It is a schematic cross-sectional view of a touch panel;

[0023] Figure 3 It is a schematic structural diagram of the touch panel according to an embodiment of the present disclosure;

[0024] Figure 4 It is Figure 3 a schematic cross-sectional view of an embodiment at the marked A-A in

[0025] Figure 5 It is Figure 3 a schematic cross-sectional view of another embodiment at the marked A-A in Detailed Description of the Embodiments

[0026] To make the objectives, technical solutions, and advantages of the present disclosure more clearly understood, the embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. The implementation manners can be implemented in multiple different forms. It is easy for those of ordinary skill in the art to understand the fact that the manners and contents can be transformed into one or more forms without departing from the gist and scope of the present disclosure. Therefore, the present disclosure should not be construed as being limited only to the contents described in the following implementation manners. Without conflict, the embodiments and features in the embodiments of the present disclosure can be arbitrarily combined with each other.

[0027] In the accompanying drawings, sometimes for clarity, the sizes, thicknesses of layers, or areas of one or more constituent elements are exaggerated. Therefore, one manner of the present disclosure is not necessarily limited to such dimensions, and the shapes and sizes of the components in the drawings do not reflect the true proportions. In addition, the drawings schematically show ideal examples, and one manner of the present disclosure is not limited to the shapes or values shown in the drawings.

[0028] The ordinal numbers such as "first", "second", "third", etc. in the present disclosure are set to avoid confusion of the constituent elements, rather than to limit in terms of quantity. The "multiple" in the present disclosure includes two and more than two quantities.

[0029] In the present disclosure, for convenience, terms indicating orientation or positional relationship such as "middle", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are used to describe the positional relationship of the constituent elements with reference to the accompanying drawings, which are only for facilitating the description of this specification and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present disclosure. The positional relationship of the constituent elements is appropriately changed according to the direction for describing the constituent elements. Therefore, it is not limited to the terms described in the specification and can be appropriately replaced according to the circumstances.

[0030] In the present disclosure, unless otherwise clearly specified and limited, the terms "mounted", "connected", and "coupled" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate member, or the communication inside two elements. For those of ordinary skill in the art, the meanings of the above terms in the present disclosure can be understood according to the circumstances.

[0031] In the present disclosure, a transistor refers to an element including at least three terminals: a gate electrode, a drain electrode, and a source electrode. The transistor has a channel region between the drain electrode (drain electrode terminal, drain region, or drain) and the source electrode (source electrode terminal, source region, or source), and current can flow through the drain electrode, the channel region, and the source electrode. In the present disclosure, the channel region refers to the region where current mainly flows.

[0032] In the present disclosure, the first pole can be the drain electrode and the second pole can be the source electrode, or the first pole can be the source electrode and the second pole can be the drain electrode. In cases where transistors with opposite polarities are used or the direction of current changes during circuit operation, etc., the functions of the "source electrode" and the "drain electrode" sometimes switch with each other. Therefore, in the present disclosure, the "source electrode" and the "drain electrode" can be switched with each other.

[0033] In the present disclosure, "electrically connected" includes cases where components are connected together through an element having a certain electrical effect. The "element having a certain electrical effect" is not particularly limited as long as it can transmit electrical signals between the components to be connected. Examples of the "element having a certain electrical effect" include not only electrodes and wirings, but also switching elements such as transistors, resistors, inductors, capacitors, and other elements having one or more functions.

[0034] In the present disclosure, "parallel" means a state where the angle formed by two straight lines is -10° or more and 10° or less, and thus, it can include a state where the angle is -5° or more and 5° or less. In addition, "perpendicular" means a state where the angle formed by two straight lines is 80° or more and 100° or less, and thus, it can include a state where the angle is 85° or more and 95° or less.

[0035] In the present disclosure, "film" and "layer" can be switched with each other. For example, sometimes the "conductive layer" can be changed to the "conductive film". Similarly, sometimes the "insulating film" can be changed to the "insulating layer".

[0036] "About" in the present disclosure means not strictly defining the boundary and allowing values within the range of process and measurement errors.

[0037] The OLED display can cause interference to the touch panel in many aspects. For example, the OLED display can affect finger touch, which may lead to a decrease in the sensitivity of the touch screen or false touch phenomena. When a user touches the screen with a finger, if there is significant electromagnetic interference, the touch screen may misread the user's input or completely ignore these inputs. For example, the OLED display can affect active pen touch. For devices that support active pens (such as styluses or digital pens), the electromagnetic interference of the OLED display may more significantly affect the performance of the pen. Generally, an active pen contains electronic components to achieve functions such as pressure sensing, and these electronic components are more vulnerable to external electromagnetic interference. The interference signals generated when the OLED display works may interact with the signals of the active pen, resulting in problems such as delays and disconnections during writing or drawing.

[0038] The electromagnetic interference of the OLED display mainly comes from the driving circuit of the display, especially those circuits that control the lighting or extinguishing of pixels. When these circuits work, they generate high-frequency signals, and these signals can be transmitted in the following ways: One way: through physical connections such as power lines and signal lines to the touch screen module. Another way: radiate in the form of electromagnetic waves, directly interfering with the operation of the touch screen. Currently, in order to reduce the interference of the OLED display to the touch screen, some measures are usually taken, such as adding a shielding layer, using filters to absorb or weaken the interference signals, or optimizing the circuit design to reduce the intensity of the interference source, etc. In addition, at the software level, the anti-interference ability of the touch screen is enhanced through algorithms, such as improving the touch recognition algorithm to better filter out unexpected touch signals. For conventional touch panels, some noise interference can already be eliminated solely at the software level. However, for some specific items and certain styluses, there are certain technical bottlenecks in the improvement of the pure software algorithm, and the noise interference cannot be perfectly eliminated. Therefore, shielding is required at the hardware level.

[0039] Generally, to improve the shielding performance of the shielding layer, the shielding layer needs to be well grounded to discharge the coupled noise signals through the grounding terminal. This requires the grounding of the shielding layer to be multi-point grounded to minimize the impedance between the grounding terminal as much as possible. The touch panel includes a touch circuit board and a display circuit board. Whether the touch circuit board and the display circuit board are grounded together and the grounding status will both affect the original data of the touch panel. If the test conditions at the touch panel end and the whole machine end are inconsistent, it may lead to deviations between tests, resulting in the inability to align the performance parameters. Therefore, in the subsequent development of the touch panel, it is necessary to improve the common grounding effect between the touch panel and the display panel.

[0040] Figure 1 It is a schematic structural diagram of a touch panel. Figure 2 It is a schematic cross-sectional view of a touch panel. AsFigure 1 , Figure 2 As shown in Figure 2 , the touch panel includes a display circuit board 100, a cover tape 200, a shielding layer 300, and a touch circuit board 400. Since there is coupling between the touch circuit board 400 and the display circuit board 100, it is usually shielded by the cover tape 200. However, due to problems such as poor adhesion of the cover tape 200, it may lead to poor grounding effect and shielding effect of the touch panel. Therefore, for touch panels with high touch requirements, a scheme of adding a shielding layer 300 is usually adopted. However, adding a shielding layer 300 will increase the number of components and cost of the touch panel. Moreover, the touch panel with the added shielding layer 300 has problems such as a long grounding path and poor common grounding between the touch circuit board and the display circuit board.

[0041] Therefore, an embodiment of the present disclosure provides a touch panel, which includes a display substrate, a display circuit board, a cover tape, and a touch circuit board located on the display substrate. The cover tape is located between the display circuit board and the touch circuit board. The touch circuit board includes a main body portion, and the display circuit board is closer to the display substrate than the main body portion. The cover tape includes a first insulating layer and a conductive layer stacked, and the first insulating layer is farther from the display substrate than the conductive layer. The cover tape has at least one first opening, and the first opening is recessed from the side of the first insulating layer far from the display substrate toward the side close to the display substrate, and the first opening exposes a part of the conductive layer.

[0042] The main body portion includes a first protective layer and a first circuit layer stacked, and the first protective layer is closer to the display substrate than the first circuit layer. The first circuit layer includes a ground wire. The main body portion has at least one second opening, and the second opening is recessed from the side of the first protective layer close to the display substrate toward the side far from the display substrate, and the second opening exposes at least a part of the ground wire.

[0043] The touch panel further includes at least one first connection layer, a part of the first connection layer is located in the first opening, and a part of the first connection layer is located in the second opening. The conductive layer is connected to the ground wire through the first connection layer.

[0044] The touch panel provided by the embodiment of the present disclosure connects the conductive layer of the cover tape with the ground wire of the touch circuit board by using the first connection layer, increases the grounding of the touch circuit board, and can improve the touch performance of the touch panel.

[0045] Figure 3 It is a schematic structural diagram of a touch panel according to an embodiment of the present disclosure. As Figure 3As shown, the touch panel may include a display substrate 10, a display circuit board 20, a cover tape 30, a touch circuit board 40, and a driving integrated circuit 50. For example, the orthographic projection of the touch panel on the plane formed by the first direction X and the second direction Y may be a rectangle extending along the first direction X. The display substrate 10 may be a flat panel for displaying images. In the embodiments of the present disclosure, the display substrate 10 may also be referred to as a screen, and the display substrate 10 may be a liquid crystal display panel or an organic light emitting diode (OLED) display panel, etc.

[0046] The display substrate 10 may have a display side and a non-display side. Among them, the display side may be the side where the display substrate can display images. When a person's eyes are on the display side, the images displayed on the display substrate can be viewed. The non-display side is opposite to the display side. The display circuit board 20, the cover tape 30, the touch circuit board 40, and the driving integrated circuit 50 may all be located on the non-display side of the display substrate 10, and the display circuit board 20 may be located between the display substrate 10 and the cover tape 30.

[0047] As Figure 3 shown, the touch circuit board 40 may be a flexible printed circuit board (FPC). The touch circuit board 40 may extend along the second direction Y. The touch circuit board 40 may include a connected main body portion 41, a bendable portion 42, and a bonding portion 43, and the bendable portion 42 and the bonding portion 43 are respectively located on opposite sides of the main body portion 41. The bendable portion 42 is configured to enable the touch circuit board 40 to be bent. The main body portion 41 may include a plurality of circuit layers. The bendable portion 42 may include a first end and a second end arranged oppositely. The first end may be connected to the display substrate 10, and the second end may be connected to the main body portion 41. The bonding portion 43 may include a first end and a second end arranged oppositely. The first end may be connected to the main body portion 41, and the second end may be connected to the driving integrated circuit 50.

[0048] As Figure 3 shown, the orthographic projection of the display circuit board 20 on the plane where the display substrate 10 is located and the orthographic projection of the cover tape 30 on the plane where the display substrate 10 is located at least partially overlap. The plane where the display substrate 10 is located is parallel to the plane formed by the first direction X and the second direction Y. The orthographic projection of the display circuit board 20 on the plane where the display substrate 10 is located, the orthographic projection of the cover tape 30 on the plane where the display substrate 10 is located, and the orthographic projection of the touch circuit board 40 on the plane where the display substrate 10 is located at least partially overlap. The orthographic projection of the main body portion 41 on the plane where the display substrate 10 is located, the orthographic projection of the display circuit board 20 on the plane where the display substrate 10 is located, and the orthographic projection of the cover tape 30 on the plane where the display substrate 10 is located at least partially overlap.

[0049] Figure 4 is Figure 3 a schematic cross-sectional view of an embodiment marked at A-A in the figure. As Figure 4 shown, only the main body 41 of the cover tape 30 and the touch control circuit board 40 are schematically shown. The third direction Z is perpendicular to the plane formed by the first direction X and the second direction Y. In the embodiments of the present disclosure, the third direction Z may also be referred to as the thickness direction of the touch panel. Along the thickness direction of the touch panel, the cover tape 30 may include a first insulating layer 31, a conductive layer 33, and a second insulating layer 32 that are sequentially stacked, and the first insulating layer 31 is farther from the display substrate 10 than the second insulating layer 32. The materials of the first insulating layer 31 and the second insulating layer 32 may be the same or different. The material of the first insulating layer 31 may be insulating ink, such as PSR ink. The material of the conductive layer 33 may be conductive adhesive. In some examples, the first insulating layer 31 may include an insulating film and an adhesive layer provided on one side of the insulating film, and the first insulating layer 31 may be laminated on the conductive layer 33 through the adhesive layer. The first insulating layer 31 of the cover tape 30 may have at least one first opening 35, and the first opening 35 may penetrate the first insulating layer 31 along the third direction Z.

[0050] The touch panel may further include at least one first connection layer 61, and the first connection layer 61 and the first opening 35 may be provided in pairs one by one. The orthographic projection of the first connection layer 61 and the first opening 35 on the plane where the display substrate 10 is located may at least partially overlap, at least a part of the first connection layer 61 may be located within the first opening 35, and the main body 41 is connected to the conductive layer 33 of the cover tape 30 via the first connection layer 61. The orthographic projection of the first connection layer 61 on the plane where the display substrate 10 is located may include the orthographic projection of the first opening 35 on the plane where the display substrate 10 is located. For example, the orthographic projection of the first connection layer 61 on the plane where the display substrate 10 is located may overlap with the orthographic projection of the first opening 35 on the plane where the display substrate 10 is located, or the area of the orthographic projection of the first connection layer 61 on the plane where the display substrate 10 is located is larger than the area of the orthographic projection of the first opening 35 on the plane where the display substrate 10 is located. For example, the first connection layer 61 may be a double-sided tape.

[0051] As Figure 4As shown, the main body portion 41 may include a first protective layer 41-1, a first adhesive layer 41-2, a first circuit layer 41-3, a substrate 41-4, a second circuit layer 41-5, a second adhesive layer 41-6, and a second protective layer 41-7 that are sequentially stacked. The first protective layer 41-1 is closer to the display substrate 10 than the second protective layer 41-7. The main body portion 41 may have at least one second opening 41-8. The second opening 41-8 may penetrate the first protective layer 41-1 and the first adhesive layer 41-2 along the third direction Z, and expose a part of the ground wire of the first circuit layer 41-3. The orthographic projection of the second opening 41-8 on the plane where the display substrate 10 is located overlaps at least partially with the orthographic projection of the first opening 35 on the plane where the display substrate 10 is located. For example, the orthographic projection of the second opening 41-8 on the plane where the display substrate 10 is located may be located within the orthographic projection of the first opening 35 on the plane where the display substrate 10 is located.

[0052] In some exemplary embodiments, the material of the substrate 41-4 may be polyimide (PI), or polyether ether ketone, or polyester, etc. The materials of the first circuit layer 41-3 and the second circuit layer 41-5 may be copper. The materials of the first adhesive layer 41-2 and the second adhesive layer 41-6 may be epoxy resin or acrylic, etc.

[0053] Figure 5 is Figure 3 a cross-sectional schematic diagram of another embodiment at the marked A-A in. As Figure 5 shown, only a part of the display substrate 10 is schematically shown, and the touch control circuit board 40 is not schematically shown. The display substrate 10 may include a mounting plate 11. The display circuit board 20 may be mounted on the mounting plate 11. The display circuit board 20 may include a substrate layer 21 and a first conductive layer and a second conductive layer on opposite sides of the substrate layer 21. The first conductive layer may at least include a first conductive region 20-1. The second conductive layer may at least include a second conductive region 20-2. The first conductive region 20-1 is closer to the mounting plate 11 of the display substrate 10 than the second conductive region 20-2. The orthographic projection of the first conductive region 20-1 on the plane where the mounting plate 11 is located overlaps at least partially with the orthographic projection of the second conductive region 20-2 on the plane where the mounting plate 11 is located. For example, the orthographic projection of the second conductive region 20-2 on the plane where the mounting plate 11 is located may be located within the orthographic projection of the first conductive region 20-1 on the plane where the mounting plate 11 is located.

[0054] As Figure 5As shown, the second insulating layer 32 may have at least one third opening 34. The third opening 34 may be located at one end of the second insulating layer 32 along the first direction X. The third opening 34 may penetrate the second insulating layer 32 along the third direction Z and penetrate the second insulating layer 32 along the positive direction of the first direction X. The positive projection of the third opening 34 on the plane where the display substrate 10 is located may be a rectangle, a circle, a hexagon, or the like. The positive projection of the third opening 34 on the plane where the display substrate 10 is located may at least partially overlap with the positive projection of the second conductive region 20-2 on the plane where the display substrate 10 is located. For example, the positive projection of the third opening 34 on the plane where the display substrate 10 is located may include the positive projection of the second conductive region 20-2 on the plane where the display substrate 10 is located.

[0055] As Figure 5 shown, the touch panel may further include at least one second connection layer 62. The second connection layer 62 is located between the conductive layer 33 and the second conductive region 20-2, and at least part of the second connection layer 62 is located within the third opening 34. The conductive layer 33 and the second conductive region 20-2 are connected through the second connection layer 62. For example, the material of the second connection layer 62 may be conductive glue, or the second connection layer 62 may be a conductive tape.

[0056] As Figure 5 shown, the touch panel may further include at least one third connection layer 63. The third connection layer 63 is located between the conductive layer 33 and the mounting plate 11, and part of the third connection layer 63 is located within the third opening 34. The conductive layer 33 is connected to the mounting plate 11 through the third connection layer 63. The positive projections of the third connection layer 63 and the second connection layer 62 on the plane where the display substrate 10 is located do not overlap. For example, the material of the third connection layer 63 may be conductive glue, or the third connection layer 63 may be a conductive tape. In the embodiments of the present disclosure, by providing the second connection layer and the third connection layer, the grounding path of the cover tape can be increased, the impedance can be reduced, and the shielding performance of the cover tape can be improved.

[0057] In some exemplary embodiments, as Figure 5 shown, the second insulating layer 32 may have two third openings 34. Along the first direction X, the two third openings 34 are respectively located at both ends of the second insulating layer 32. One third opening 34 may penetrate the second insulating layer 32 along the positive direction of the first direction X, and the other third opening 34 may penetrate the second insulating layer 32 along the reverse direction of the first direction X. The touch panel may include two second connection layers 62 and two third connection layers 63. One third opening 34, one second connection layer 62, and one third connection layer 63 may be set in a group. In the embodiments of the present disclosure, by providing multiple groups of second connection layers and third connection layers, the grounding path of the cover tape can be increased, the impedance can be reduced, and the shielding performance of the cover tape can be improved.

[0058] In some possible exemplary embodiments, the touch panel may further include a shielding layer (not shown), and the shielding layer is located between the touch control circuit board 40 and the cover tape 30. The shielding layer is provided with at least one avoidance hole for avoiding the first connection layer 61.

[0059] The embodiments of the present disclosure further provide a display device, and the display device may include the touch panel shown in any of the above embodiments. The display device may be: a mobile phone, a tablet computer, a television, a laptop computer, a navigator, or any other product or component with a touch function.

[0060] Although the disclosed embodiments of the present invention are as above, the above content is only an embodiment adopted for facilitating the understanding of the present invention, and is not intended to limit the present invention. It should be noted that the above embodiments or embodiments are merely exemplary and not restrictive. Therefore, the present disclosure is not limited to the content specifically shown and described herein. Various modifications, substitutions, or omissions can be made to the form and details of the implementation without departing from the scope of the present disclosure.

Claims

1. A touch panel, characterized in that: The device comprises a display substrate, a display circuit board, a cover tape and a touch circuit board located on the display substrate, wherein the cover tape is located between the display circuit board and the touch circuit board, the touch circuit board comprises a main body, and the display circuit board is closer to the display substrate than the main body; The cover tape comprises a first insulating layer and a conductive layer which are stacked, and the first insulating layer is farther from the display substrate than the conductive layer, the cover tape has at least one first opening, and the first opening is recessed from a side of the first insulating layer away from the display substrate toward a side close to the display substrate, and the first opening exposes a portion of the conductive layer; The main body includes a first protective layer and a first circuit layer which are stacked, and the first protective layer is closer to the display substrate than the first circuit layer, and the first circuit layer includes a ground line; the main body has at least one second opening, and the second opening is recessed from a side of the first protective layer close to the display substrate to a side away from the display substrate, and the second opening exposes at least a portion of the ground line; The touch panel further includes at least one first connection layer, and part of the first connection layer is located in the first opening, and part of the first connection layer is located in the second opening, and the conductive layer is connected to the ground line via the first connection layer.

2. The touch panel according to claim 1, wherein: The orthographic projections of the first opening and the second opening on the plane where the display substrate is located at least partially overlap.

3. The touch panel according to claim 2, wherein: The orthographic projection of the first opening on the plane where the display substrate is located includes the orthographic projection of the second opening on the plane where the display substrate is located.

4. The touch panel according to claim 1, wherein: The orthographic projection of the first connection layer on the plane where the display substrate is located includes the orthographic projection of the first opening on the plane where the display substrate is located.

5. The touch panel according to any one of claims 1 to 4, characterized in that: The cover tape further includes a second insulating layer, and the second insulating layer and the first insulating layer are respectively located on two opposite sides of the conductive layer; the cover tape has at least one third opening, the third opening is recessed from a side of the second insulating layer close to the display substrate toward a side away from the display substrate, and the third opening exposes a portion of the conductive layer; The display circuit board comprises a substrate layer and a conductive area located on at least one side of the substrate layer; The touch panel further includes at least one second connection layer, and at least a portion of the second connection layer is located within the third opening, and the conductive layer and the conductive area are connected via the second connection layer.

6. The touch panel according to claim 5, wherein: The orthographic projection of the third opening on the plane where the display substrate is located includes the orthographic projections of the second connection layer and the conductive area on the plane where the display substrate is located.

7. The touch panel according to claim 5, wherein: The display circuit board comprises a first conductive layer, the base material layer and a second conductive layer which are stacked, the first conductive layer comprises a first conductive area, the second conductive layer comprises a second conductive area, and the first conductive area is closer to the display substrate than the second conductive area; The conductive layer and the second conductive area are connected via the second connecting layer, and the first conductive area is connected to the display substrate.

8. The touch panel according to claim 5, wherein: The touch panel also includes at least one third connection layer, and at least a portion of the third connection layer is located within the third opening, the orthographic projections of the third connection layer and the second connection layer on the plane where the display substrate is located do not overlap, and the conductive layer is connected to the display substrate via the third connection layer.

9. The touch panel according to claim 8, wherein: The cover tape has two third openings, which are respectively located at two opposite ends of the cover tape; the touch panel includes two second connection layers and two third connection layers, and one third opening, one second connection layer and one third connection layer are arranged in a group.

10. A display device, characterized in that: It comprises the touch panel as claimed in any one of claims 1 to 9.

Images