Capacitive touch screen and electronic equipment

Abstract

The invention relates to the technical field of touch display screens, and discloses a capacitive touch screen which comprises a touch area and a binding area, the touch area comprises a first touch electrode layer, an insulating layer and a second touch electrode layer, the first touch electrode layer comprises a plurality of first electrodes, first blocks and first leads, the insulating layer is provided with a plurality of communicating holes, and the second touch electrode layer comprises a plurality of second electrodes, a plurality of second blocks and a plurality of second leads. The second touch electrode layer comprises a plurality of second electrodes, second blocks and second leads, the first leads are guided to the second touch electrode layer through the communicating holes, and each first lead comprises a first lead front end part and a first lead rear end part; the number of overlapped points of the rear end part of each first lead and the first electrode corresponding to the front end part of the first lead in the projection direction is not more than 10, and the influence of the first lead on the overall grid density can be reduced by reasonably limiting the number of the overlapped points of the first lead and the first electrode in the projection direction, so that the overall touch performance is improved. The invention further discloses an electronic device with the capacitive touch screen.

Description

Technical Field

[0001] The present invention relates to the technical field of touch display screens, and particularly to a capacitive touch screen and an electronic device. Background Art

[0002] In the existing capacitive touch screen, the electrode leads are arranged in the touch area, so as to avoid separately arranging a wiring area outside the touch area to achieve a multi-sided borderless design. This capacitive touch screen usually uses a metal mesh as the touch electrode. Since the electrode leads are arranged in the touch area, the metal mesh density in this touch area increases. When the capacitive touch screen is working, the larger the metal mesh density in the area, the larger the induction signal obtained. Therefore, when the touched point is located in the area where the electrode leads are arranged, the phenomenon of line deviation is likely to occur. Especially when using an active pen for drawing operations, due to the difference in touch signals, the active pen will show an obvious line deviation phenomenon in this area. Even by optimizing the software algorithm, the line deviation phenomenon often cannot be completely eliminated, thus greatly affecting the user experience.

[0003] Therefore, how to solve the problems of the decline in touch performance and uneven appearance caused by the change in the density of the electrode metal mesh has become an urgent technical issue in the industry. Summary of the Invention

[0004] The present invention aims to solve at least one problem in the background art. For this purpose, the present invention provides a capacitive touch screen with good touch performance.

[0005] A capacitive touch screen according to an embodiment of the first aspect of the present invention includes a touch area and a bonding area. The touch area includes a first touch electrode layer, an insulating layer, and a second touch electrode layer. The first touch electrode layer includes a plurality of first electrodes extending along a first direction and a plurality of first blocks. The first blocks are disposed between two of the first electrodes, and a first lead is led out from each of the first electrodes; the insulating layer is provided with a plurality of communication holes; the second touch electrode layer includes a plurality of second electrodes extending along a second direction and a plurality of second blocks. The second blocks are disposed between two of the second electrodes, and a second lead is led out from one end of each of the second electrodes close to the bonding area. The first leads are guided to the second touch electrode layer through the communication holes, and the plurality of first leads and the second leads extend along the second direction to the bonding area; the first touch electrode layer and the second touch electrode layer are metal mesh layers. Wherein, the first lead includes a front end portion and a rear end portion of the first lead. The front end portion of the first lead is disposed on the first electrode and the insulating layer, and the rear end portion of the first lead is disposed on the second block and extends along the second direction to the bonding area. The number of points where the rear end portion of each first lead overlaps with the first electrode corresponding to the front end portion of the first lead in the projection direction does not exceed 10.

[0006] It can be seen that by limiting the number of points where the rear end portion of the first lead guided to the second touch electrode layer overlaps with the first electrode corresponding to the front end portion of the first lead within a reasonable range, the influence of the first lead on the overall grid density can be minimized, thereby improving the overall touch performance.

[0007] According to another embodiment of the present invention, the number of points where the rear end portion of each first lead overlaps with the first electrode corresponding to the front end portion of the first lead in the projection direction is 1-8.

[0008] According to another embodiment of the present invention, ground wires are further disposed on the second blocks. Two ground wires are disposed on each of the second blocks, and the two ground wires are respectively disposed between the rear end portion of the first lead and the second electrode.

[0009] According to another embodiment of the present invention, a plurality of connecting wires are further disposed on the second blocks, and the connecting wires connect the two ground wires.

[0010] According to another embodiment of the present invention, a ground wire bus is further disposed in the bonding area, and the plurality of ground wires are aggregated to the ground wire bus.

[0011] According to another embodiment of the present invention, a plurality of supplementary wires are further disposed on the second blocks, and the supplementary wires have the same grid pattern as the rear end portion of the first lead.

[0012] According to another embodiment of the present invention, the number of points where the rear ends of the plurality of first leads overlap with the corresponding first electrodes of the front ends of the first leads in the projection direction is the same.

[0013] According to another embodiment of the present invention, the width of the first electrode along the second direction is less than 7 mm.

[0014] According to another embodiment of the present invention, the width of the second electrode along the first direction is less than 7 mm.

[0015] An electronic device according to an embodiment of the second aspect of the present invention includes the capacitive touch screen described in any one of the above.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention discloses a capacitive touch screen, including a touch area and a bonding area. The touch area includes a first touch electrode layer, an insulating layer, and a second touch electrode layer. The first touch electrode layer includes a plurality of first electrodes extending along a first direction and a plurality of first blocks. The first blocks are disposed between two first electrodes. Each first electrode leads out a first lead. The insulating layer is provided with a plurality of communication holes. The second touch electrode layer includes a plurality of second electrodes extending along a second direction and a plurality of second blocks. The second blocks are disposed between two second electrodes. One end of each second electrode close to the bonding area leads out a second lead. The first leads are guided to the second touch electrode layer through the communication holes, and a plurality of first leads and second leads extend along the second direction to the bonding area. The first touch electrode layer and the second touch electrode layer are metal mesh layers. Wherein, the first lead includes a front end portion and a rear end portion of the first lead. The front end portion of the first lead is disposed on the first electrode and the insulating layer. The rear end portion of the first lead is disposed on the second block and extends along the second direction to the bonding area. The number of points where the rear end portion of each first lead overlaps with the corresponding first electrode of the front end portion of the first lead in the projection direction does not exceed 10. By limiting the number of points where the rear end portion of the first lead guided to the second touch electrode layer overlaps with the corresponding first electrode of the front end portion of the first lead in the projection direction within a reasonable range, the influence of the first lead on the overall grid density can be minimized, thereby improving the overall touch performance.

[0018] The additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings are only used to illustrate the embodiments and are not considered to limit the present invention. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0020] Figure 1 Schematic diagram of an embodiment of the capacitive touch screen provided by this application;

[0021] Figure 2 Schematic diagram of the first touch electrode layer of an embodiment of the capacitive touch screen provided by this application;

[0022] Figure 3 Schematic diagram of the second touch electrode layer of an embodiment of the capacitive touch screen provided by this application;

[0023] Figure 4 Schematic cross-sectional view of an embodiment of the capacitive touch screen provided by this application;

[0024] Figure 5 Schematic partial view of an embodiment of the capacitive touch screen provided by this application;

[0025] Figure 6 Schematic partial view of another embodiment of the capacitive touch screen provided by this application;

[0026] Figure 7 Schematic partial view of yet another embodiment of the capacitive touch screen provided by this application;

[0027] Figure 8 Schematic cross-sectional view of an embodiment of the electronic device provided by this application;

[0028] The meanings of the markings in the figure are as follows:

[0029] 10, Electronic device;

[0030] 100, Capacitive touch screen; 101, Touch area; 102, Bonding area;

[0031] 110, First touch electrode layer; 111, First electrode; 112, First block;

[0032] 113, First lead; 1131, Front end portion of the first lead; 1132, Rear end portion of the first lead;

[0033] 120, Second touch electrode layer; 121, Second electrode; 122, Second block;

[0034] 123, Second lead; 124, Ground wire; 125, Connection wire; 126, Supplementary wire;

[0035] 130, Insulating layer; 131, Communication hole;

[0036] 140, Ground wire bus. Detailed implementation manners

[0037] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where like or similar reference numerals denote like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0038] In the description of the present invention, it should be understood that features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0039] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "mounted", "connected" and "coupled" should be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] To illustrate the capacitive touch screen and electronic device provided in the present application, the following will be elaborated in detail in conjunction with the accompanying drawings of the specification and the textual description of the embodiments.

[0041] Next, reference is made to Figures 1-7 Describe a capacitive touch screen 100 according to an embodiment of the first aspect of the present invention, as Figures 1-4As shown, it includes a touch area 101 and a bonding area 102. Specifically, the touch area 101 includes a first touch electrode layer 110, an insulating layer 130, and a second touch electrode layer 120. The insulating layer 130 is disposed between the first touch electrode layer 110 and the second touch electrode layer 120 to achieve electrical isolation between the two. Further, the first touch electrode layer 110 includes a plurality of first electrodes 111 extending along a first direction and a plurality of first blocks 112. The first blocks 112 are disposed between two adjacent first electrodes 111 to achieve electrical isolation between the two adjacent first electrodes 111. Specifically, each first electrode 111 leads out a first lead 113, and the first leads 113 all extend along the first direction to the bonding area 102. Further, the second touch electrode layer 120 includes a plurality of second electrodes 121 extending along a second direction and a plurality of second blocks 122. The second blocks 122 are disposed between two adjacent second electrodes 121 to achieve electrical isolation between the two adjacent second electrodes 121. Specifically, one end of each second electrode 121 close to the bonding area 102 leads out a second lead 123. Further, the insulating layer 130 is provided with a plurality of communication holes 131. The first leads 113 can be guided through the communication holes 131 to the second blocks 122 of the second touch electrode layer 120. At the same time, multiple first leads 113 and second leads 123 extend along the second direction to the bonding area 102. Further, the first touch electrode layer 110 and the second touch electrode layer 120 are metal mesh layers, that is, the first electrodes 111, the first blocks 112, the second electrodes 121, and the second blocks 122 are all composed of a plurality of metal mesh patterns. Among them, the first lead 113 includes a first lead front end portion 1131 and a first lead rear end portion 1132. Specifically, the first lead front end portion 1131 is disposed on the first electrode 111 and the insulating layer 130, and the first lead rear end portion 1132 is disposed on the second block 122 and extends along the second direction to the bonding area 102. The number of points where each first lead rear end portion 1132 overlaps with the first electrode 111 corresponding to the first lead front end portion 1131 in the projection direction does not exceed 10. It can be understood that by limiting the number of points where the first lead rear end portion 1132 guided to the second touch electrode layer 120 overlaps with the first electrode 111 corresponding to the first lead front end portion 1131 in the projection direction within a reasonable range, the influence of the first lead 113 on the overall grid density can be minimized, thereby improving the overall touch performance.

[0042] It should be noted that each first lead 113 includes a first lead front end portion 1131 and a first lead rear end portion 1132. The number of points where each first lead rear end portion 1132 overlaps with the first electrode 111 where the corresponding first lead front end portion 1131 is located in the projection direction does not exceed 10. For example, the number of points where each first lead rear end portion 1132 overlaps with the first electrode 111 where the corresponding first lead front end portion 1131 is located in the projection direction is 1, or the number of points where each first lead rear end portion 1132 overlaps with the first electrode 111 where the corresponding first lead front end portion 1131 is located in the projection direction is 2, or the number of points where each first lead rear end portion 1132 overlaps with the first electrode 111 where the corresponding first lead front end portion 1131 is located in the projection direction is 3, or the number of points where each first lead rear end portion 1132 overlaps with the first electrode 111 where the corresponding first lead front end portion 1131 is located in the projection direction is 4, or the number of points where each first lead rear end portion 1132 overlaps with the first electrode 111 where the corresponding first lead front end portion 1131 is located in the projection direction is 5, or the number of points where each first lead rear end portion 1132 overlaps with the first electrode 111 where the corresponding first lead front end portion 1131 is located in the projection direction is 6, or the number of points where each first lead rear end portion 1132 overlaps with the first electrode 111 where the corresponding first lead front end portion 1131 is located in the projection direction is 7, or the number of points where each first lead rear end portion 1132 overlaps with the first electrode 111 where the corresponding first lead front end portion 1131 is located in the projection direction is 8, or the number of points where each first lead rear end portion 1132 overlaps with the first electrode 111 where the corresponding first lead front end portion 1131 is located in the projection direction is 9, or the number of points where each first lead rear end portion 1132 overlaps with the first electrode 111 where the corresponding first lead front end portion 1131 is located in the projection direction is 10. It can be understood that since the grid patterns of the first touch electrode layer 110 and the second touch electrode layer 120 are staggered from each other in the projection direction, by reducing the number of points where the first lead rear end portion 1132 overlaps with the first electrode 111 in the projection direction, the grid density of the first electrode 111 can be effectively reduced, thereby improving the overall touch performance.

[0043] It should be noted that the first direction and the second direction are perpendicular to each other. For example, the first direction can extend along the X-axis direction, and the second direction extends along the Y-axis direction.

[0044] It should be noted that the materials of the first touch electrode layer 110 and the second touch electrode layer 120 are conductive materials. For example, the first touch electrode layer 110 and the second touch electrode layer 120 can be metals such as copper, molybdenum or aluminum, or the first touch electrode layer 110 and the second touch electrode layer 120 can be ITO materials, or the first touch electrode layer 110 and the second touch electrode layer 120 can be nano-silver materials.

[0045] According to an embodiment of the present invention, as Figures 5-7 shown, the number of points where the rear end portion 1132 of each first lead overlaps with the first electrode 111 corresponding to the front end portion 1131 of the first lead in the projection direction is 1-8. For example, the number of points where the rear end portion 1132 of each first lead overlaps with the first electrode 111 where the corresponding front end portion 1131 of the first lead is located in the projection direction is 1, or the number of points where the rear end portion 1132 of each first lead overlaps with the first electrode 111 where the corresponding front end portion 1131 of the first lead is located in the projection direction is 2, or the number of points where the rear end portion 1132 of each first lead overlaps with the first electrode 111 where the corresponding front end portion 1131 of the first lead is located in the projection direction is 3, or the number of points where the rear end portion 1132 of each first lead overlaps with the first electrode 111 where the corresponding front end portion 1131 of the first lead is located in the projection direction is 4, or the number of points where the rear end portion 1132 of each first lead overlaps with the first electrode 111 where the corresponding front end portion 1131 of the first lead is located in the projection direction is 5, or the number of points where the rear end portion 1132 of each first lead overlaps with the first electrode 111 where the corresponding front end portion 1131 of the first lead is located in the projection direction is 6, or the number of points where the rear end portion 1132 of each first lead overlaps with the first electrode 111 where the corresponding front end portion 1131 of the first lead is located in the projection direction is 7, or the number of points where the rear end portion 1132 of each first lead overlaps with the first electrode 111 where the corresponding front end portion 1131 of the first lead is located in the projection direction is 8. By reducing the number of points where the rear end portion 1132 of the first lead overlaps with the first electrode 111 in the projection direction and limiting the number of points where the rear end portion 1132 of the first lead overlaps with the first electrode 111 in the projection direction within 8, the grid density of the first electrode 111 can be effectively reduced, thereby improving the overall touch performance. Preferably, the number of points where the rear end portion 1132 of the first lead overlaps with the first electrode 111 in the projection direction is 1 or 2. It can be understood that, on the premise of ensuring connection, reducing the number of points where the rear end portion 1132 of the first lead overlaps with the first electrode 111 in the projection direction as much as possible can further reduce the grid density of the first electrode 111 and improve the overall touch performance.

[0046] According to an embodiment of the present invention, as Figure 6 and Figure 7As shown, a ground wire 124 is also provided on the second block 122. Two ground wires 124 are provided on each second block 122, and the two ground wires 124 are respectively arranged between the rear end portion 1132 of the first lead and the second electrode 121. It can be understood that by providing the ground wire 124 on the second block 122, the electrical signal interference of the rear end portion 1132 of the first lead on the adjacent second electrode 121 can be effectively reduced, thereby improving the overall touch performance.

[0047] It should be noted that the two ground wires 124 can be evenly arranged on the second block 122, that is, the two ground wires 124 have the same pattern and the distances between the two ground wires 124 and the rear end portion 1132 of the first lead and the second electrode 121 are the same, so as to improve the overall appearance uniformity.

[0048] According to an embodiment of the present invention, as Figure 7 shown, a plurality of connection lines 125 are also provided on the second block 122. The connection lines 125 connect the two ground wires 124. It can be understood that by providing the connection lines 125, the two ground wires 124 can be connected, thereby further reducing the electrical signal interference of the rear end portion 1132 of the first lead on the adjacent second electrode 121 and improving the electrical signal shielding effect.

[0049] According to an embodiment of the present invention, as Figure 1 shown, a ground wire bus 140 is also provided in the bonding area 102. A plurality of ground wires 124 are aggregated to the ground wire bus 140. Specifically, the ground wires 124 extend along the second direction to the bonding area 102 and are aggregated to the ground wire bus 140 in the bonding area 102.

[0050] According to an embodiment of the present invention, as Figure 5 shown, a plurality of supplementary lines 126 are also provided on the second block 122. Further, the supplementary lines 126 have the same grid pattern as the rear end portion 1132 of the first lead. It can be understood that by providing the supplementary lines 126 having the same grid pattern as the rear end portion 1132 of the first lead, the uniformity of the grid pattern of the entire second block 122 can be increased, thereby improving the optical effect and enhancing the uniformity performance of the appearance.

[0051] According to an embodiment of the present invention, as Figures 5-7As shown, the number of points where the rear ends 1132 of multiple first leads overlap with the first electrode 111 corresponding to the front ends 1131 of the first leads in the projection direction is the same. It can be understood that the rear ends 1132 of multiple first leads on multiple second blocks 122 can have the same setting, that is, the number of points where the rear ends 1132 of multiple first leads on multiple second blocks 122 overlap with the first electrode 111 corresponding to the front ends 1131 of the first leads in the projection direction is the same, thereby further improving the uniformity of the overall grid pattern, improving the optical effect, and enhancing the uniformity performance of the appearance.

[0052] According to an embodiment of the present invention, as Figure 2 shown, the width of the first electrode 111 in the second direction is less than 7 mm. It can be understood that the width of the first electrode 111 in the second direction needs to be limited within a suitable range to avoid excessive width affecting the overall layout or too small width resulting in too large overall resistance value. Preferably, the width range of the first electrode 111 in the second direction is 0.1 mm - 3.5 mm. For example, the width range of the first electrode 111 in the second direction is 1 mm - 2 mm, or the width range of the first electrode 111 in the second direction is 2 mm - 3 mm, or the width range of the first electrode 111 in the second direction is 1 mm - 3 mm. It can be understood that the width of the first electrode 111 in the second direction can be selected according to the specific usage scenario to achieve the optimal usage effect.

[0053] According to an embodiment of the present invention, as Figure 3 shown, the width of the second electrode 121 in the first direction is less than 7 mm. It can be understood that the width of the second electrode 121 in the first direction needs to be limited within a suitable range to avoid excessive width affecting the overall layout or too small width resulting in too large overall resistance value. Preferably, the width range of the second electrode 121 in the first direction is 0.1 mm - 3.5 mm. For example, the width range of the second electrode 121 in the first direction is 1 mm - 2 mm, or the width range of the second electrode 121 in the first direction is 2 mm - 3 mm, or the width range of the second electrode 121 in the first direction is 1 mm - 3 mm. It can be understood that the width of the second electrode 121 in the first direction can be selected according to the specific usage scenario to achieve the optimal usage effect.

[0054] Next, refer to Figure 8 to describe an electronic device 10 according to an embodiment of the second aspect of the present invention, as Figure 8As shown, the electronic device 10 includes a capacitive touch screen 100. The capacitive touch screen 100 includes a touch area 101 and a bonding area 102. The touch area 101 includes a first touch electrode layer 110, an insulating layer 130, and a second touch electrode layer 120. The first touch electrode layer 110 includes a plurality of first electrodes 111, a first block 112, and a first lead 113. The insulating layer 130 is provided with a plurality of communication holes 131. The second touch electrode layer 120 includes a plurality of second electrodes 121, a second block 122, and a second lead 123. The first lead 113 is guided to the second touch electrode layer 120 through the communication holes 131. Among them, the first lead 113 includes a first lead front end portion 1131 and a first lead rear end portion 1132. The number of points where each first lead rear end portion 1132 overlaps with the first electrode 111 corresponding to the first lead front end portion 1131 in the projection direction does not exceed 10. By reasonably limiting the number of points where the first lead 113 overlaps with the first electrode 111 in the projection direction, the influence of the first lead 113 on the overall grid density can be minimized, thereby improving the overall touch performance.

[0055] The above capacitive touch screen and electronic device provided by the present application are preferred embodiments, and should not be construed as limiting the scope of the claims of the present application. Those skilled in the art should know that without departing from the concept of the present application, various improvements or replacements can be made, and all improvements or replacements should be within the scope of the claims of the present application. That is, the scope of the claims of the present application should be based on the claims.

[0056] In the case of no conflict, the above embodiments and the features in the embodiments in this article can be combined with each other.

Claims

1. A capacitive touch screen, comprising a touch area and a bonding area, characterized in that, the touch area includes: a first touch electrode layer, the first touch electrode layer includes a plurality of first electrodes extending along a first direction and a plurality of first blocks, the first blocks are disposed between two of the first electrodes, and each of the first electrodes leads out a first lead wire; an insulating layer, the insulating layer is provided with a plurality of communication holes; a second touch electrode layer, the second touch electrode layer includes a plurality of second electrodes extending along a second direction and a plurality of second blocks, the second blocks are disposed between two of the second electrodes, and one end of each of the second electrodes close to the bonding area leads out a second lead wire, the first lead wire is guided to the second touch electrode layer through the communication hole, and a plurality of the first lead wires and the second lead wires extend along the second direction to the bonding area; the first touch electrode layer and the second touch electrode layer are metal mesh layers, wherein, the first lead wire includes a first lead wire front end portion and a first lead wire rear end portion, the first lead wire front end portion is disposed on the first electrode and the insulating layer, the first lead wire rear end portion is disposed on the second block and extends along the second direction to the bonding area, and the number of points where each of the first lead wire rear end portions overlaps with the first electrode corresponding to the first lead wire front end portion in the projection direction does not exceed 10.

2. The capacitive touch screen according to claim 1, characterized in that, the number of points where each of the first lead wire rear end portions overlaps with the first electrode corresponding to the first lead wire front end portion in the projection direction is 1 - 8.

3. The capacitive touch screen according to claim 2, characterized in that, ground wires are further disposed on the second block, two ground wires are disposed on each of the second blocks, and the two ground wires are respectively disposed between the first lead wire rear end portion and the second electrode.

4. The capacitive touch screen according to claim 3, characterized in that, a plurality of connecting wires are further disposed on the second block, and the connecting wires connect the two ground wires.

5. The capacitive touch screen according to claim 4, characterized in that, a ground wire bus is further disposed in the bonding area, and the plurality of ground wires are aggregated to the ground wire bus.

6. The capacitive touch screen according to claim 2, characterized in that, a plurality of supplementary wires are further disposed on the second block, and the supplementary wires have the same grid pattern as the first lead wire rear end portion.

7. The capacitive touch screen according to claim 2, characterized in that, the number of points where a plurality of the first lead wire rear end portions overlap with the first electrode corresponding to the first lead wire front end portion in the projection direction is the same.

8. The capacitive touch screen according to claim 1, characterized in that, the width of the first electrode along the second direction is less than 7 mm.

9. The capacitive touch screen according to claim 1, characterized in that, the width of the second electrode along the first direction is less than 7 mm.

10. An electronic device, characterized in that, it includes the capacitive touch screen according to any one of claims 1 - 9.

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