Touch display panel and electronic equipment

Abstract

The utility model is applicable to the technical field of touch display, and provides a touch display panel, which comprises a display module, the touch layer is provided with a touch area used for touch induction and a peripheral area arranged on the peripheral side of the touch area, and a metal circuit and a golden finger connected to the metal circuit are arranged in the peripheral area; the flexible circuit board is connected to the golden fingers; the touch layer is attached to the display module through a bonding layer, and the projection of the bonding layer on the touch layer covers the touch area, the metal circuit and the golden finger. The utility model further provides the electronic equipment. The touch display panel and the display equipment provided by the utility model solve the problem that the metal circuit in the peripheral area is easy to break.

Description

Technical Field

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

[0002] At present, a common touch display panel includes a display module and a touch layer attached to the display module, and the touch layer is bound to the flexible circuit board through a gold finger. However, after the binding is completed, the subsequent bending of the flexible circuit board and assembly of the whole machine can easily cause the metal circuit in the surrounding area to break, resulting in poor product function. Utility Model Content

[0003] In view of this, the present application provides a touch display panel and an electronic device to solve the problem that metal circuits in the peripheral area are easily broken.

[0004] An embodiment of the first aspect of the present application provides a touch display panel, including:

[0005] Display module;

[0006] A touch layer, the touch layer having a touch area for touch sensing and a peripheral area arranged around the touch area, wherein a metal circuit and a gold finger connected to the metal circuit are arranged in the peripheral area;

[0007] A flexible circuit board connected to the gold finger;

[0008] The touch layer is attached to the display module via an adhesive layer, and the projection of the adhesive layer on the touch layer covers the touch area, the metal circuit and the gold finger.

[0009] The touch display panel provided by the embodiment of the present application includes a display module, a touch layer, a flexible circuit board and an adhesive layer. The touch layer has a touch area for touch sensing and a peripheral area arranged around the touch area. The peripheral area is provided with a metal circuit and a gold finger connected to the metal circuit; the projection of the adhesive layer on the touch layer covers the touch area, the metal circuit and the gold finger. The bonding layer is not only arranged corresponding to the touch area of ​​the touch layer, but also arranged corresponding to the metal circuit and the gold finger in the peripheral area. After the touch layer is attached to the display module through the adhesive layer, there is no step difference or only a small height difference between the metal circuit and the gold finger, so that the adhesive layer can protect the metal circuit and prevent the metal circuit from being easily broken due to excessive step difference. The touch display panel provided by the embodiment of the present application solves the problem of easy breakage of the metal circuit in the peripheral area, and improves the yield of the product.

[0010] In some embodiments, the touch layer includes a transparent substrate and a metal grid structure disposed on the substrate, the metal grid structure is disposed in the touch area, and the metal line is led out from the metal grid structure;

[0011] Wherein, the adhesive layer is arranged on a side of the substrate away from the metal grid structure.

[0012] In some embodiments, the adhesive layer is a first transparent optical adhesive layer.

[0013] In some embodiments, a portion of the outer contour line of the first transparent optical adhesive layer is located between the gold finger and the edge of the substrate.

[0014] In some embodiments, the adhesive layer includes a first transparent optical adhesive layer and a double-sided adhesive tape;

[0015] The projection of the first transparent optical adhesive layer on the touch layer covers the touch area and the metal circuit;

[0016] The projection of the double-sided adhesive on the touch layer covers the gold finger.

[0017] In some embodiments, the touch display panel further includes a protective layer, and the protective layer is attached to a side of the touch layer away from the display module through a second transparent optical adhesive layer.

[0018] In some embodiments, the second transparent optical adhesive layer does not overlap with the flexible circuit board.

[0019] In some embodiments, the protective layer is a decorative layer.

[0020] In some embodiments, the touch display panel is a flexible substrate thin film touch structure, and the substrate is a flexible substrate.

[0021] An embodiment of a second aspect of the present application provides an electronic device, comprising a touch display panel as provided in the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0023] Figure 1 is a schematic structural diagram of a touch display panel provided in an embodiment of the present application;

[0024] Figure 2is a schematic structural diagram of a touch display panel provided in an embodiment of the present application with a display module removed;

[0025] Figure 3 yes Figure 2 A partial enlarged view of part A of the touch display panel shown;

[0026] Figure 4 It is a schematic diagram of the structure of a flexible circuit board, a touch layer and an adhesive layer provided in one embodiment of the present application;

[0027] Figure 5 is a schematic structural diagram of a touch display panel provided by another embodiment of the present application with a display module removed;

[0028] Figure 6 yes Figure 5 A partial enlarged view of part B of the touch display panel shown.

[0029] The meanings of the marks in the figure are:

[0030] 100. Touch display panel;

[0031] 10. Display module;

[0032] 20. Touch layer; 21. Metal circuit; 22. Gold finger; 23. Base material;

[0033] 201, touch area; 202, peripheral area;

[0034] 30. Flexible circuit board;

[0035] 40. Adhesive layer; 41. First transparent optical adhesive layer; 42. Double-sided adhesive tape;

[0036] 50. Protective layer;

[0037] 60. A second transparent optical adhesive layer. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings, i.e., embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0039] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly or indirectly on the other component. When a component is referred to as being "connected to" another component, it may be directly or indirectly connected to the other component.

[0040] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0041] The terms "first" and "second" are only used for descriptive purposes and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features. "Multiple" means two or more, unless otherwise clearly and specifically defined.

[0042] In order to illustrate the technical solution of the present application, a description is given below with reference to specific drawings and embodiments.

[0043] At present, a common touch display panel includes a display module and a touch layer attached to the display module, and the touch layer is bound to the flexible circuit board through a gold finger. In some cases, the touch layer is bonded to the display module through an optical adhesive layer, and the optical adhesive layer is designed to avoid air in the gold finger area, that is, the optical adhesive layer avoids the gold finger area. However, after the flexible circuit board is bound to the touch layer, subsequent actions such as bending the flexible circuit board and assembling the whole machine are likely to cause the metal circuit in the surrounding area to break.

[0044] In view of this, the present application provides a touch display panel, in which the adhesive layer between the display module and the touch layer covers the area where the gold finger is located, which can solve the problem of metal circuit breakage due to the presence of step difference.

[0045] The first aspect of the present application provides a touch display panel. Figures 1 to 4 The touch display panel 100 includes a display module 10, a touch layer 20 and a flexible printed circuit 30 (Flexible Printed Circuit, FPC). The touch layer 20 has a touch area 201 for touch sensing and a peripheral area 202 arranged around the touch area 201. The peripheral area 202 is provided with a metal circuit 21 and a gold finger 22 connected to the metal circuit 21; the touch layer 20 is attached to the display module 10 through an adhesive layer 40, and the projection of the adhesive layer 40 on the touch layer 20 covers the touch area 201, the metal circuit 21 and the gold finger 22.

[0046] The display module 10 is a module for displaying images. In some embodiments, the display module 10 is an LCD display module 10 (LCD Module, LCM). In other embodiments, the display module 10 may also be an OLED display module 10 or other types of display modules 10.

[0047] The touch layer 20 is used to sense touch and generate touch sensing signals. The touch layer 20 has a touch area 201 and a peripheral area 202 . The touch area 201 is provided with a touch sensing electrode structure and is used to sense touch. The peripheral area 202 is provided outside the touch area 201 .

[0048] The peripheral area 202 is provided with metal circuits 21 and gold fingers 22, and the gold fingers 22 are connected to the touch sensing electrode structure in the touch area 201 through the corresponding metal circuits 21. The gold fingers 22 are used to bind with the flexible circuit board 30 to electrically connect the flexible circuit board 30 with the touch layer 20.

[0049] The flexible circuit board 30 is a highly reliable flexible printed circuit board made of polyimide or polyester film as a substrate 23. The flexible circuit board 30 is bound and connected to the gold finger 22 in the touch layer 20, so that the flexible circuit board 30 can transmit signals to the touch layer 20. When the touch display panel 100 is assembled with other devices, the flexible circuit board 30 can be bent to reduce the space occupied by the flexible circuit board 30.

[0050] The touch layer 20 is attached to the display module 10 through the adhesive layer 40 , so that the adhesive layer 40 can fix the touch layer 20 on the display module 10 .

[0051] The projection of the adhesive layer 40 on the touch layer 20 covers the touch area 201, the metal circuit 21 and the gold finger 22, that is, the adhesive layer is not only arranged corresponding to the touch area 201 of the touch layer 20, but also arranged corresponding to the metal circuit 21 and the gold finger 22 in the peripheral area 202. The projection of the adhesive layer 40 on the touch layer 20 refers to the positive projection of the adhesive layer 40 toward the touch layer 20.

[0052] After the touch layer 20 is attached to the display module 10 through the adhesive layer 40, there is no step difference or only a small height difference between the metal circuit 21 and the gold finger 22, so that the adhesive layer can protect the metal circuit 21 and the gold finger 22, and prevent the metal circuit 21 from being easily broken due to excessive step difference; at the same time, the adhesive layer eliminates the thickness step at the gold finger 22, and reduces the folding, twisting and other changes in the gold finger 22 area caused by bending, pulling and other actions of the flexible circuit board 30.

[0053] The touch display panel 100 provided in the embodiment of the present application includes a display module 10, a touch layer 20, a flexible circuit board 30 and an adhesive layer 40. The touch layer 20 has a touch area 201 for touch sensing and a peripheral area 202 arranged around the touch area 201. The peripheral area 202 is provided with a metal circuit 21 and a gold finger 22 connected to the metal circuit 21. The projection of the adhesive layer 40 on the touch layer 20 covers the touch area 201, the metal circuit 21 and the gold finger 22. The junction layer is not only arranged corresponding to the touch area 201 of the touch layer 20, but also arranged corresponding to the metal circuit 21 and the gold finger 22 in the peripheral area 202. After the touch layer 20 is attached to the display module 10 through the adhesive layer 40, there is no step difference or only a small height difference between the metal circuit 21 and the gold finger 22, so that the adhesive layer can protect the metal circuit 21 and prevent the metal circuit 21 from being easily broken due to the large step difference. The touch display panel 100 provided in the embodiment of the present application solves the problem that the metal circuit 21 in the peripheral area 202 is easily broken, thereby improving the yield of the product.

[0054] Please refer to Figures 1 to 4 In some embodiments, the touch layer 20 includes a transparent substrate 23 and a metal grid structure (not shown) disposed on the substrate 23, the metal grid structure is disposed in the touch area 201, and the metal line 21 is led out from the metal grid structure; wherein the adhesive layer 40 is disposed on a side of the substrate 23 away from the metal grid structure.

[0055] The substrate 23 is made of a transparent material and has good light transmittance. The metal mesh structure is a touch sensing electrode structure in the touch layer 20, which is used for touch sensing. The metal mesh structure may include a metal layer or two insulating metal layers, and a metal mesh is formed by crossing a plurality of metal wires.

[0056] The metal grid structure, metal line 21 and gold finger 22 are located on the same side of the substrate 23, and the adhesive layer 40 is located on the other side of the substrate 23. Figure 4 As shown, the flexible circuit board 30 is located on the side of the touch layer 20 away from the adhesive layer, so that the flexible circuit board 30 and the gold finger 22 can be bound together.

[0057] The projection of the adhesive layer on the touch layer 20 covers the touch area 201, that is, covers the metal grid structure. It can be understood that the adhesive layer can be a whole layer structure corresponding to the touch layer 20, or a plurality of avoidance areas can be set on the peripheral area 202, but the adhesive layer does not need to set avoidance areas at the metal line 21 and the gold finger 22 to avoid the metal line 21 from breaking due to the step difference.

[0058] In other embodiments, the touch sensing electrode structure may also adopt other structures, not limited to the metal grid structure.

[0059] In some embodiments, the adhesive layer 40 is a first transparent optical adhesive layer 41. The transparent optical adhesive layer is an OCA (Optically Clear Adhesive) optical adhesive layer, which has the advantages of clarity, high light transmittance (total light transmittance> 99%), high adhesion, high weather resistance, water resistance, high temperature resistance, UV resistance, controlled thickness, providing uniform spacing, and no yellowing (yellowing), peeling and deterioration problems after long-term use. The transparent optical adhesive layer is applied to the touch display panel 100 to reduce the glare of the display module 10, increase the contrast, especially the contrast under strong light, and make the product surface smoother.

[0060] In some embodiments, a portion of the outer contour line of the first transparent optical adhesive layer 41 is located between the gold finger 22 and the edge of the substrate 23 .

[0061] Specifically, the outer contour line of part of the first transparent optical adhesive layer 41 extends along the edge of the substrate 23, and the outer contour line of part of the first transparent optical adhesive layer 41 is located between the edge of the gold finger 22 and the substrate 23, so that the first transparent optical adhesive layer 41 sets a certain air avoidance area outside the gold finger 22, which can reduce the overall thickness of the area where the flexible circuit board 30 is located, which is conducive to the thinning of the touch display panel 100.

[0062] Please refer to Figure 1 , Figure 5 and Figure 6 In some embodiments, the adhesive layer 40 includes a first transparent optical adhesive layer 41 and a double-sided adhesive layer 42 , the projection of the first transparent optical adhesive layer 41 on the touch layer 20 covers the touch area 201 and the metal line 21 , and the projection of the double-sided adhesive layer 42 on the touch layer 20 covers the gold finger 22 .

[0063] The first transparent optical adhesive layer 41 has a large area and can cover the touch area 201 and the metal circuit 21; the double-sided adhesive 42 is only located in the area where the gold finger 22 is located, and is arranged corresponding to the gold finger 22. Specifically, part of the outer contour line of the first transparent optical adhesive layer 41 extends along the edge of the substrate 23, and part of the outer contour line of the first transparent optical adhesive layer 41 is located between the metal circuit 21 and the gold finger 22, or in the middle of the gold finger 22.

[0064] Optionally, the thickness of the double-sided adhesive 42 is equal to the thickness of the first transparent optical adhesive layer 41 ; in other embodiments, the thickness of the double-sided adhesive 42 may also be slightly smaller than the thickness of the first transparent optical adhesive layer 41 , which can also reduce the step difference in the touch layer 20 .

[0065] Optionally, the outer contour line of the double-sided adhesive 42 is spaced apart from the edge of the substrate 23 , that is, the double-sided adhesive 42 does not need to extend to the edge of the substrate 23 to avoid part of the flexible circuit board 30 , thereby reducing the thickness of the touch display panel 100 in the area where the flexible circuit board 30 is located.

[0066] Please refer to Figures 1 to 6 In some embodiments, the touch display panel 100 further includes a protective layer 50 , and the protective layer 50 is attached to a side of the touch layer 20 away from the display module 10 through a second transparent optical adhesive layer 60 .

[0067] The protective layer 50 is used to protect the touch layer 20 and the display module 10, and the protective layer 50 is a transparent layer. The protective layer 50 is attached to the touch layer 20 through the second transparent optical adhesive layer 60, and the second transparent optical adhesive layer 60 also has the advantages of clarity and high light transmittance.

[0068] By adopting the above solution, the touch display panel 100 can protect the touch layer 20 and the display module 10 through the protection layer 50 .

[0069] In some embodiments, the second transparent optical adhesive layer 60 does not overlap with the flexible circuit board 30 .

[0070] like Figure 3 , Figure 6 As shown, part of the outer contour line of the second transparent optical adhesive layer 60 extends along the edge of the substrate 23, and part of the outer contour line of the second transparent optical adhesive layer 60 is located between the metal circuit 21 and the edge of the substrate 23, the second transparent optical adhesive layer 60 does not cover the gold finger 22 and the flexible circuit board 30, or the second transparent optical adhesive layer 60 only covers the end of the gold finger 22 close to the metal circuit 21, and the part of the gold finger 22 not covered by the second transparent optical adhesive layer 60 can be bound to the flexible circuit board 30.

[0071] By adopting the above technical solution, the second transparent optical adhesive layer 60 can avoid the gold finger 22 and the flexible circuit board 30 , and does not affect the binding of the touch layer 20 and the flexible circuit board 30 .

[0072] In some embodiments, the protection layer 50 is a decorative film (Deco Film).

[0073] The decorative film is a flexible film used for decoration. In this way, the protective layer 50 can decorate the window of the touch display panel 100 .

[0074] In other embodiments, the protection layer 50 may also be of other types, for example, the protection layer 50 is glass.

[0075] In some embodiments, the touch display panel 100 is an Add On Film Touch (AOFT) structure, and the substrate 23 is a flexible substrate.

[0076] The flexible substrate thin film touch structure belongs to a capacitive touch screen. The flexible substrate thin film touch structure uses a flexible base material 23 as a base, has good flexibility, is easy to bend, and has the advantages of being lighter and thinner.

[0077] It can be understood that in other embodiments, the touch display panel 100 can also be an OGS (One Glass Solution), OGM (One Glass Metal Mesh) or other structures, and the adhesive layer 40 provided in the embodiment of the present application can also provide protection for the metal circuit 21, wherein the OGS structure refers to using ITO as a conductive electrode, and directly manufacturing the touch screen sensor functional film layer on the back of the cover glass; the OGM structure refers to using a sputtering coating process to manufacture a metal grid as an auxiliary cathode to improve the conductive performance, and combined with the OGS process to manufacture an integrated capacitive touch screen with a metal grid structure.

[0078] Please refer to Figures 1 to 4 Some embodiments of the present application provide a touch display panel 100, including a display module 10, a first transparent optical adhesive layer 41, a touch layer 20, a second transparent optical adhesive layer 60 and a protective layer 50 stacked in sequence, wherein the touch layer 20 has a touch area 201 for touch sensing and a peripheral area 202 arranged around the touch area 201, a metal grid structure is arranged in the touch area 201, and a metal circuit 21 and a gold finger 22 connected to the metal circuit 21 are arranged in the peripheral area 202; the touch display panel 100 also includes a flexible circuit board 30 connected to the gold finger 22. The touch layer 20 is attached to the display module 10 through the first transparent optical adhesive layer 41, and the projection of the adhesive layer 40 on the touch layer 20 covers the touch area 201, the metal circuit 21 and the gold finger 22. The above touch display panel 100 optimizes the profile of the first transparent optical adhesive layer 41 to prevent the metal circuit 21 from being easily broken due to excessive step difference. The touch display panel 100 provided in the embodiment of the present application solves the problem that the metal circuit 21 in the peripheral area 202 is easily broken, thereby improving the yield of the product.

[0079] In addition, by setting the first transparent optical adhesive layer 41 as the bonding layer, it can be manufactured through a one-time coating process, which does not increase the original process flow and has a low cost; and compared with the prior art, the touch display panel 100 provided in the embodiment of the present application does not significantly increase the overall thickness, which is conducive to the thinness of the touch display panel 100.

[0080] An embodiment of a second aspect of the present application provides an electronic device, including the touch display panel 100 provided in the first aspect.

[0081] The electronic device may be any product or component with a touch display function, such as a laptop, computer, smart phone, tablet computer, smart bracelet, smart watch, touch screen display, digital photo frame, etc.

[0082] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A touch display panel, characterized in that: include: Display module; A touch layer, the touch layer having a touch area for touch sensing and a peripheral area arranged around the touch area, wherein a metal circuit and a gold finger connected to the metal circuit are arranged in the peripheral area; A flexible circuit board connected to the gold finger; The touch layer is attached to the display module via an adhesive layer, and the projection of the adhesive layer on the touch layer covers the touch area, the metal circuit and the gold finger.

2. The touch display panel according to claim 1, wherein: The touch layer includes a transparent substrate and a metal grid structure disposed on the substrate, the metal grid structure is disposed in the touch area, and the metal line is led out from the metal grid structure; Wherein, the adhesive layer is arranged on a side of the substrate away from the metal grid structure.

3. The touch display panel according to claim 2, wherein: The bonding layer is a first transparent optical adhesive layer.

4. The touch display panel according to claim 3, wherein: A portion of the outer contour line of the first transparent optical adhesive layer is located between the gold finger and the edge of the substrate.

5. The touch display panel according to claim 2, wherein: The adhesive layer includes a first transparent optical adhesive layer and a double-sided adhesive; The projection of the first transparent optical adhesive layer on the touch layer covers the touch area and the metal circuit; The projection of the double-sided adhesive on the touch layer covers the gold finger.

6. The touch display panel according to any one of claims 2 to 5, characterized in that: The touch display panel further includes a protection layer, and the protection layer is attached to a side of the touch layer away from the display module through a second transparent optical adhesive layer.

7. The touch display panel according to claim 6, wherein: The second transparent optical adhesive layer does not overlap with the flexible circuit board.

8. The touch display panel according to claim 6, wherein: The protective layer is a decorative film.

9. The touch display panel according to any one of claims 2 to 5, characterized in that: The touch display panel is a flexible substrate thin film touch control structure, and the substrate is a flexible substrate.

10. An electronic device, characterized in that: The invention comprises a touch display panel as claimed in any one of claims 1 to 9.

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