Touch panel and display module
By adopting the design of a double-layer anti-film layer and a low-drain optical adhesive layer in the OGS touch panel, the problems of insufficient visibility of the groove area and structural strength are solved, and better optical consistency and high-intensity touch panel design are achieved.
Patent Information
- Application Number
- CN202422370464.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-26
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-09-26
AI Technical Summary
The difference in optical characteristics between the existing OGS touch screens between the groove area and the interval area makes it obvious visually visible, affecting the overall optical effect and user experience of the display screen, and the single-layer anti-film layer has insufficient structural strength in a high-intensity environment.
A double-layer anti-collision layer structure is adopted, wherein the first anti-collision layer is located between the touch layer and the substrate, and the second anti-collision layer covers the touch layer and the trench, combining with a low-release optical adhesive layer to enhance structural strength and optimize optical consistency.
It significantly weakens the visibility of the groove area, optimizes optical consistency, and improves the structural strength of the touch panel, prevents layer structure from peeling off, and expands the product usage range.
Smart Images

Figure CN223078676U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of display technologies, and specifically provides a touch panel and a display module. Background Art
[0002] OGS (One Glass Solution) is widely used in touch screens of electronic devices such as smart phones and tablet computers. For an OGS touch screen, a channel etching is usually performed on a conductive layer of ITO material to form a conductive circuit. However, there are significant differences in optical properties between the formed trench region and the spacer region after etching. This difference makes the trench region visually obvious, seriously affecting the overall optical effect of the display screen and the user experience.
[0003] To solve the above problem of optical effect differences, in the prior art, a single-layer anti-reflection layer solution is usually adopted to optimize the display effect. However, although the single-layer anti-reflection layer alleviates the problem of the visibility of the trench region to a certain extent, the ideal anti-reflection effect has not been achieved. Moreover, the existing single-layer anti-reflection layer structure cannot meet the usage requirements under high-strength environments, and the influence on the structural strength after introducing the anti-reflection layer still needs to be further optimized.
[0004] Due to the obvious deficiency of the existing single-layer anti-reflection layer solution of the touch panel in terms of optical consistency, correspondingly, there is a need in the art for a new touch panel solution to solve the above problems. Summary of the Utility Model
[0005] The present application provides a touch panel and a display module, aiming to solve the above technical problems, that is, to solve the problem of poor optical consistency of the existing touch panel.
[0006] In a first aspect, the present application provides a touch panel, including a touch area and a border area surrounding the touch area. The touch panel includes:
[0007] A substrate;
[0008] A touch layer disposed on the substrate, and the touch layer is located within the touch area;
[0009] A first anti-reflection layer and a second anti-reflection layer respectively located on both sides of the touch layer, wherein the first anti-reflection layer is located between the touch layer and the substrate.
[0010] In a technical solution of the above touch panel, the touch layer includes:
[0011] A bridging portion;
[0012] The touch electrode layer formed on the bridging portion includes a first touch electrode and a second touch electrode arranged crosswise, wherein a groove is formed between the first touch electrode and the second touch electrode to expose the bridging portion, and the second touch electrode includes a first sub-electrode and a second sub-electrode, and the first sub-electrode and the second sub-electrode are electrically connected through the bridging portion at the intersection with the first touch electrode;
[0013] An insulating layer is disposed between the bridging portion and the first touch electrode to electrically insulate the bridging portion and the first touch electrode.
[0014] Wherein, the second light-shielding layer covers the first touch electrode, the second touch electrode and the groove.
[0015] In one technical solution of the above touch panel, the material of the first light-shielding layer and / or the second light-shielding layer is silicon oxynitride.
[0016] In one technical solution of the above touch panel, the thicknesses of the first light-shielding layer and the second light-shielding layer are both
[0017] In one technical solution of the above touch panel, it further includes: a light-shielding portion disposed in the border area.
[0018] In one technical solution of the above touch panel, the light-shielding portion is a black matrix.
[0019] In one technical solution of the above touch panel, it further includes an optical adhesive layer disposed between the first light-shielding layer and the substrate, and the optical adhesive layer covers the light-shielding portion and the substrate in the touch area.
[0020] In one technical solution of the above touch panel, the optical adhesive layer is a low outgassing optical adhesive to avoid bubbling of the optical adhesive during subsequent processes of the touch panel.
[0021] In one technical solution of the above touch panel, it further includes metal traces extending from the border area to connect the first touch electrode and the second touch electrode.
[0022] In one technical solution of the above touch panel, it further includes a protective layer, and the protective layer is disposed above the second light-shielding layer.
[0023] In a second aspect, the present application provides a display module, including:
[0024] A display panel;
[0025] The touch panel according to any one of the above technical solutions, disposed on the light-emitting side of the display panel.
[0026] In the case of adopting the above technical solution, through the setting of the double-layer shadow elimination layer, the present application can weaken the visibility of the groove area of the touch panel and optimize the optical consistency.
[0027] Furthermore, due to the setting of the shadow elimination layer covering the groove, the formed embedded structure can effectively prevent the layer structure of the touch panel from peeling off.
[0028] Furthermore, by using an optical adhesive with a low outgassing rate to form an optical adhesive layer, the structural strength is effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS
[0029] The preferred embodiments of the present application will be described below with reference to the accompanying drawings, in which:
[0030] Figures 1A - 1D is a schematic diagram of a touch panel according to the prior art; among them Figure 1A is a schematic diagram of the structure of the touch panel; Figure 1B is a schematic diagram of the groove area in the touch panel;
[0031] Figure 1C is a schematic diagram of outgassing of the OC0 layer in the touch panel; Figure 1D is a schematic diagram of the photoelectric effect of Nb2O5;
[0032] Figures 2A - 2B is a schematic diagram of a touch panel according to an embodiment of the present application; among them Figure 2A shows a top view of the touch panel; Figure 2B shows the touch area of the touch panel;
[0033] Figure 3 is a schematic diagram of the thermal stability of an optical adhesive with a low outgassing rate according to an embodiment of the present application;
[0034] Figures 4A - 4P is a process flow chart of the preparation of a touch panel according to an embodiment of the present application;
[0035] Figure 5A is a schematic diagram of the shadow elimination judgment area of a display module according to an embodiment of the present application; Figure 5B is an example of the shadow elimination judgment standard of a display module according to an embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0036] Some embodiments of the present application will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principle of the present application and are not intended to limit the protection scope of the present application.
[0037] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the following will clearly and completely describe the technical solutions of the embodiments of this application in conjunction with the accompanying drawings of the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, rather than all of them. Based on the described embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.
[0038] Unless otherwise defined, the technical terms or scientific terms used in this application shall have the ordinary meaning understood by those of ordinary skill in the art to which this application belongs. The "first", "second", and similar terms used in this application do not denote any order, quantity, or importance, but are only used to distinguish different components. The terms such as "including" or "comprising" mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. The terms such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms such as "upper", "lower", "left", "right", etc. are only used to represent relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.
[0039] To optimize the display effect and reduce the visibility of the groove area in the touch panel, a light-shielding layer is usually provided. In the prior art, a touch panel is provided. Please refer to the attached Figures 1A - 1D .
[0040] Figures 1A - 1D is a schematic diagram of a touch panel according to the prior art, where Figure 1A is a schematic diagram of the structure of the touch panel; Figure 1B is a schematic diagram of the groove area in the touch panel; Figure 1C is a schematic diagram of air release in the OC0 layer of the touch panel; Figure 1D is a schematic diagram of the photoelectric effect of Nb2O5.
[0041] Please refer to the attached Figure 1A , the structure of the touch panel in the prior art includes a glass substrate 100, an optical adhesive OC0 layer 101, a first touch electrode 103 and a second touch electrode 105 (including 105A, 105B) arranged crosswise, a bridging portion 102, an insulating layer 104, a light-shielding layer 106, and a protective layer 107.
[0042] Although the light-shielding layer 106 is provided, the ideal light-shielding effect of the groove area is still not achieved. Please refer to the attached Figure 1B . Figure 1BFIG. 0 is a schematic diagram of the trench area in the touch panel. When a single-layer anti-reflection layer is provided, the trench area is still visible, which affects the user experience.
[0043] In the prior art, air bubbles are easily generated during the preparation of the OC0 layer 101, resulting in a peeling risk of the touch panel and unable to meet the usage requirements in a high-strength environment. Please refer to the appendix Figure 1C , Figure 1C FIG. 7 is a schematic diagram of outgassing of the OC0 layer in the touch panel. In the existing preparation process, heating is inevitable during the preparation of the touch panel, and heating will cause gas to overflow from the OC0 layer, that is, the outgassing phenomenon. The overflowing gas will form bubbles between the layers, thereby affecting the structural strength of the entire touch panel and also causing a decline in the optical performance of the touch panel.
[0044] In addition, the anti-reflection layer 106 in the prior art usually uses Nb2O5 (niobium pentoxide) material. The Nb2O5 material has instability, and its conductivity is prone to change under the conditions of high temperature or ultraviolet (UV) irradiation.
[0045] Please refer to the appendix Figure 1D , Figure 1D FIG. 17 is a schematic diagram of the photoelectric effect of Nb2O5. Among them, Ev represents the valence band energy, Eg represents the energy gap, and Ec represents the critical energy. Under UV conditions, the following reaction occurs in Nb2O5: Nb2O5 - e - = NbO x , Nb204 - e - = NbO x , and the number of multivalent oxides increases; Nb x+ + e - = Nb, and the metal bond increases. The increase in the metal bond will lead to an increase in the conductivity of Nb2O5.
[0046] Since the anti-reflection layer 106 is directly provided on the touch electrode and plays an insulating role while eliminating reflection, the change in conductivity will make the electrical performance of the touch panel unstable, prone to short-circuit risks, and the service life is greatly shortened.
[0047] To solve the above problems, the present application provides a touch panel, as shown in Figures 2A - 2B .
[0048] Please refer to the appendix Figures 2A - 2B , Figures 2A - 2B FIG. 44 is a schematic diagram of a touch panel according to an embodiment of the present application. Specifically, Figure 2A shows a top view of the touch panel; Figure 2B shows the touch area of the touch panel.
[0049] As shown in Figure 2AAs shown, the touch panel includes a touch area 30 and a border area 31 surrounding the touch area.
[0050] In an embodiment of the present application, please refer to Figure 2B , the touch panel includes:
[0051] A substrate 200;
[0052] A touch layer 220 disposed on the substrate 200, and the touch layer 220 is located within the touch area;
[0053] A first shadow elimination layer 203 and a second shadow elimination layer 215 respectively located on both sides of the touch layer 220, wherein the first shadow elimination layer 203 is located between the touch layer 220 and the substrate 200, and the second shadow elimination layer 215 is entirely located on the touch layer 220.
[0054] In the case of adopting the above technical solution, through the setting of the double-layer shadow elimination layer, the present application can weaken the visibility of the trench area of the touch panel and optimize the optical consistency.
[0055] In an embodiment of the present application, the touch layer 220 includes:
[0056] A bridging portion 206;
[0057] A touch electrode layer formed on the bridging portion 206, including a first touch electrode 210 and a second touch electrode 211 arranged crosswise, wherein a trench is formed between the first touch electrode 210 and the second touch electrode 211, exposing the bridging portion 206, and the second touch electrode 211 includes a first sub-electrode 211A and a second sub-electrode 211B, and the first sub-electrode 211A and the second sub-electrode 211B are conductively connected through the bridging portion 206 at the intersection with the first touch electrode 210;
[0058] An insulating layer 207 is disposed between the bridging portion 206 and the first touch electrode 210 to electrically insulate the bridging portion 206 and the first touch electrode 210. Among them, the second shadow elimination layer 215 covers the first touch electrode 210, the second touch electrode 211, and the trench.
[0059] Among them, Figure 2B Shows a partial sectional view along the Figure 2A section line A-A in. In actual operation, the touch area may include a plurality of first touch electrodes 210 and second touch electrodes 211 arranged in an array, or may include other structures not shown.
[0060] In this embodiment, both the first touch electrode 210 and the second touch electrode 211 are etched and formed using ITO (Indium Tin Oxide) material.
[0061] In the case where there are grooves, the second anti-reflection layer 215 fills the grooves, that is, it includes a flat portion above the touch layer 220 and an embedded portion embedded in the grooves. The second anti-reflection layer 215 is not simply formed on top of the touch layer 220. With the help of the embedded portion, the second anti-reflection layer 215 is more tightly combined with the touch layer 220, reducing the risk of peeling.
[0062] In this embodiment, the material of the first anti-reflection layer 203 and / or the second anti-reflection layer 215 is silicon oxynitride (SiO x N y ), and the thicknesses of both the first anti-reflection layer 203 and the second anti-reflection layer 215 are It should be noted here that the thickness of the second anti-reflection layer 215 refers to the thickness of the flat portion. Preferably, in one embodiment, the thicknesses of both the first anti-reflection layer 203 and the second anti-reflection layer 215 (flat portion) are
[0063] The application of the double-layer SiO x N y anti-reflection layer can significantly improve the anti-reflection effect and avoid the problem of the conductivity decrease of the traditional Nb2O5 material under high temperature or UV conditions.
[0064] Furthermore, in one embodiment, the touch panel further includes: a light-shielding portion disposed in the border area.
[0065] In one embodiment of the present application, the light-shielding portion is a black matrix. Among them, the black matrix is made of an opaque thin film material.
[0066] Furthermore, in one embodiment, the touch panel further includes an optical adhesive layer 202 disposed between the first anti-reflection layer 203 and the substrate 200, and the optical adhesive layer 200 covers the substrate on the light-shielding portion and the touch area.
[0067] In one embodiment, the optical adhesive layer is a low outgassing optical adhesive to avoid the optical adhesive bubbling during the subsequent processes of the touch panel. The low outgassing optical adhesive can be achieved by controlling the temperature of the whole process. In one embodiment of the present application, controlling the whole process at 200 °C or below can make the optical adhesive layer 200 meet the requirements of low outgassing, ensure sufficient strength, and prevent the problem of the touch panel peeling during user use.
[0068] Due to the use of the full-surface manufacturing process, the optical glue layer covers both the touch area and the border area at the same time, further improving the structural strength of the touch panel. At the same time, since the low outgassing optical glue does not form bubbles, it can be more stably bonded to the substrate 200 and the first anti-reflection layer 203, achieving the effect of further reducing the peeling risk.
[0069] Please refer to the attached Figure 3 , Figure 3 It is a schematic diagram of the thermal stability of the low outgassing optical glue according to an embodiment of the present application. By performing thermogravimetric analysis (TGA) under heating conditions from 200°C to 350°C, the weight loss of the conventional optical glue (Normal OC) used in the prior art is more severe than that of the low outgassing optical glue (LowOutgas OC) in this embodiment. Low Outgas OC loses 1% of its weight at 296°C, while Normal OC has already reached 1% weight loss at 279°C; Low Outgas OC loses 3% of its weight at 328°C, while Normal OC has already reached 3% weight loss at 309°C. Therefore, the low outgassing optical glue in this embodiment has better thermal stability, is not easily decomposed and emits gas, and can greatly improve the bubbling problem of the optical glue layer.
[0070] Since the outgassing amount is difficult to directly measure, the optical glue can be tested for thermal decomposition to determine whether it is a low outgassing optical glue. For example: through thermogravimetric analysis, if the optical glue loses 1% of its weight in the temperature range of 300 ± 10°C, then the optical glue is considered a low outgassing optical glue.
[0071] The above test method is only an example. If the optical glue layer 200 has a low outgassing amount and does not produce bubbles, it can be considered to meet the standard of the low outgassing optical glue.
[0072] The application of the OC0 layer of the low outgassing optical glue, when used in combination with the double-layer anti-reflection layer structure, enhances the overall strength of the glass substrate and improves the stability of the manufacturing process.
[0073] In an embodiment of the present application, the touch panel further includes metal traces (not shown), which extend from the border area to connect the first touch electrode 210 and the second touch electrode 211.
[0074] The touch electrodes are connected to an external flexible printed circuit (FPC) through the metal traces to achieve touch control of the touch panel.
[0075] Further, in one embodiment, a protective layer 216 is further included, and the protective layer 216 is disposed above the second anti-reflection layer 215.
[0076] In this embodiment, the optical adhesive layer 200 is also referred to as the OC0 layer; the insulating layer 207 is also referred to as the OC1 layer; and the protective layer 216 is also referred to as the OC2 layer. The OC0 layer, OC1 layer, and OC2 layer can all be prepared by coating with a resin material, such as an acrylic compound.
[0077] The high-strength and high-ghosting elimination OGS solution proposed in this application breaks through the limitations of traditional technologies, further expands the product usage range of the OGS structure, and improves the performance of the products.
[0078] To further illustrate the structure of the above touch panel, this application also provides a process flow for manufacturing the above touch panel. Please refer to FIG. 4, Figures 4A - 4P which is a process flow chart for manufacturing a touch panel according to an embodiment of this application. Specifically, Figure 2B shows a partial sectional view along Figure 2A section line B-B in
[0079] The manufacturing process of the above touch panel at least includes the following steps S1 to S16:
[0080] As Figure 4A shown in
[0081] As Figure 4B shown in
[0082] As Figure 4C shown in
[0083] As Figure 4D shown in x N y step S1, provide a glass substrate 400;
[0084] As Figure 4E shown in
[0085] As Figure 4F shown in
[0086] As Figure 4G shown in
[0087] As shown in the attached figure Figure 4H In step S8, an insulating layer 407 is formed, and the preparation process is a local process at 230°C; the insulating layer 407 is also called the OC1 layer;
[0088] As shown in the attached figure Figure 4I In step S9, an ITO2 layer 408 is formed, and the whole-surface process temperature during the preparation process is <200°C; the ITO2 layer 408 is subsequently used to form the first touch electrode and the second touch electrode;
[0089] As shown in the attached figure Figure 4J In step S10, a second mask layer 409 is formed. The second mask layer 409 is a patterned photoresist layer and is used to form the first touch electrode and the second touch electrode;
[0090] As shown in the attached figure Figure 4K In step S11, the ITO2 layer 408 is etched using the second mask layer 409 to form a first touch electrode 410 and a second touch electrode 411. Among them, the second touch electrode 411 includes a first sub-electrode 411A and a second sub-electrode 411B, and the first sub-electrode 411A and the second sub-electrode 411B are conductively connected through the bridging portion 406 at the intersection with the first touch electrode 410;
[0091] As shown in the attached figure Figure 4L In step S12, a metal conductive layer 412 is formed, and the whole-surface process temperature during the preparation process is 30°C. The metal conductive layer 412 is used to form metal traces subsequently;
[0092] As shown in the attached figure Figure 4M In step S13, a third mask layer 413 is formed. The third mask layer 413 is a patterned photoresist layer;
[0093] As shown in the attached figure Figure 4N In step S14, the metal conductive layer 412 is etched using the third mask layer 413 to form metal traces 414; the metal traces 414 extend from the border area and connect the first touch electrode 410 and the second touch electrode 411.
[0094] As shown in the attached figure Figure 4O In step S15, a second anti-reflection layer 415 is formed. Preferably, the second anti-reflection layer 415 is prepared from SiO x N y and the whole-surface process temperature during the preparation process is 200°C;
[0095] As shown in the attached figure Figure 4PAs shown, in step S16, a protective layer 416 is formed above the second light-shielding layer 415, and the overall process temperature during the manufacturing process is < 200 °C; the protective layer 416 is also referred to as the OC2 layer.
[0096] The touch panel manufactured according to the above steps reduces the visibility of the trench area of the touch panel and optimizes the optical consistency; at the same time, it improves the structural strength and effectively prevents the layer structure of the touch panel from peeling off.
[0097] In a second aspect, the present application provides a display module, including:
[0098] A display panel;
[0099] The touch panel according to any one of the above technical solutions, which is disposed on the light-emitting side of the display panel.
[0100] Further, in order to clearly judge the light-shielding situation of the electronic device, the present application also provides a light-shielding situation testing method, including:
[0101] 1. The observation point is 30 ± 5 cm away from the center of the display panel; the observation point can be a measuring device or the human eye;
[0102] 2. The up, down, left, and right observation angles: 90° ± 45°;
[0103] 3. The temperature of the test environment: 22 ± 5 °C, the humidity: 55 ± 10% RH, and the illuminance: contrast between light and dark under 400 - 1000 Lux (non-surface light source);
[0104] 4. Judgment specification: ≤ L2 (subject to the client's limited sample) is considered qualified for the light-shielding situation.
[0105] As shown in Figure 5, where Figure 5A is a schematic diagram of the light-shielding judgment area of the display module according to an embodiment of the present application.
[0106] The light-shielding situation is judged by observing the light and dark alternating area, Figure 5A The area pointed by the arrow is a light and dark alternating area.
[0107] Further, for the judgment specification involved in the light-shielding situation testing method, please refer to Figure 5B , Figure 5B is an example of the light-shielding judgment standard of the display module according to an embodiment of the present application.
[0108] Among them, the grading standard at the bridge point:
[0109] L1: Invisible from all perspectives;
[0110] L2: Vaguely visible from the side view (small and not shiny);
[0111] L3: Vaguely visible from the front view, visible from the side view (small, shiny but not obvious, relatively faint).
[0112] L4: Clearly visible from both the front view and the side view (obviously shiny).
[0113] Grading criteria for the groove area (i.e., the Pattern area):
[0114] L1: Invisible from all views.
[0115] L2: The Pattern pattern is vaguely visible from the side view (the outline of the pattern is vaguely visible).
[0116] L3: The Pattern pattern is vaguely visible from the front view and clearly visible from the side view (the pattern is relatively clear).
[0117] L4: The Pattern pattern is clearly visible from both the front view and the side view (the pattern is clearly visible).
[0118] The above definitions are for the shadow elimination criteria of the bridge points and the Pattern pattern, divided into levels L1 to L4, which respectively describe different shadow elimination effects from invisible to clearly visible, so as to evaluate the consistency of the product under various viewing angles and lighting conditions.
[0119] So far, the technical solution of the present application has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present application is obviously not limited to these specific embodiments. Without departing from the principle of the present application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of the present application.
Claims
1. A touch panel, comprising a touch area and a border area surrounding the touch area, characterized in that, The touch panel includes: a substrate; a touch layer disposed on the substrate, and the touch layer is located within the touch area; a first light extinction layer and a second light extinction layer respectively located on both sides of the touch layer, wherein the first light extinction layer is located between the touch layer and the substrate.
2. The touch panel according to claim 1, wherein, The touch layer includes: a bridging portion; a touch electrode layer formed on the bridging portion, including a first touch electrode and a second touch electrode arranged crosswise, wherein a groove is formed between the first touch electrode and the second touch electrode to expose the bridging portion, and the second touch electrode includes a first sub-electrode and a second sub-electrode, and the first sub-electrode and the second sub-electrode are conductively connected through the bridging portion at the intersection with the first touch electrode; an insulating layer disposed between the bridging portion and the first touch electrode to electrically insulate the bridging portion and the first touch electrode, wherein the second light extinction layer covers the first touch electrode, the second touch electrode, and the groove.
3. The touch panel according to claim 1 or 2, characterized in that, The material of the first light extinction layer and / or the second light extinction layer is silicon oxynitride.
4. The touch panel according to claim 3, wherein The thicknesses of both the first shadow elimination layer and the second shadow elimination layer are 5. The touch panel according to claim 1, wherein It further includes: a light-shielding portion disposed in the border area.
6. The touch panel according to claim 5, wherein The light-shielding portion is a black matrix.
7. The touch panel according to claim 5 or 6, characterized in that, It further includes an optical adhesive layer disposed between the first light extinction layer and the substrate, and the optical adhesive layer covers the light-shielding portion and the substrate in the touch area.
8. The touch panel according to claim 7, wherein, The optical adhesive layer is a low outgassing optical adhesive to avoid bubbling of the optical adhesive during subsequent processes of the touch panel.
9. The touch panel according to claim 2, wherein, It further includes metal traces extending from the border area to connect the first touch electrode and the second touch electrode.
10. The touch panel according to claim 1, wherein, It further includes a protective layer disposed above the second light extinction layer.
11. A display module, characterized in that, It includes: a display panel; the touch panel according to any one of claims 1-10, disposed on the light-emitting side of the display panel.