CN216671221U - Conductive film and touch module comprising same - Google Patents

Abstract

A conductive film comprises a first conductive layer, wherein the first conductive layer comprises a plurality of first conductive channels, the first conductive channels extend along a first direction, and the difference of the resistance values of at least two first conductive channels is not more than 15%. According to the conductive film, the positioning accuracy of the conductive film can be improved by controlling the difference of the resistance values of the first conductive channels.

Description

Conductive film and touch module comprising same

Technical Field

The present invention relates to the field of touch control, and in particular, to a conductive film and a touch module including the conductive film.

Background

This section provides background information related to the present disclosure only and is not necessarily prior art.

With the development of the technology, large-size touch control is also increasingly popularized, and the application range is increasingly wide, for example, public places (airports, railway stations and the like), electrified education markets and the like, and the popularity of smart homes have great requirements for large-size touch control.

However, in the prior art, the positioning of the touch module is not particularly accurate, and a deviation occurs, so that a problem that the large-size touch positioning is poor in accuracy needs to be solved urgently.

SUMMERY OF THE UTILITY MODEL

The present invention has been made to solve at least one of the above-mentioned problems. The purpose is realized by the following technical scheme:

an embodiment of the present application provides a conductive film, which includes a first conductive layer, where the first conductive layer includes a plurality of first conductive channels, each of the plurality of first conductive channels extends along a first direction, and a difference between resistance values of at least two of the first conductive channels is not greater than 15%.

According to the conductive film disclosed by the embodiment of the application, the positioning accuracy of the conductive film can be improved by controlling the difference of the resistance values of the first conductive channels.

In addition, the conductive film according to the embodiment of the present invention may further have the following additional technical features:

in one embodiment, the difference between the resistance values of any two first conductive paths is not greater than 15%.

In one embodiment, the conductive layer further includes a second conductive layer, the second conductive layer is stacked with the first conductive layer, the second conductive layer includes a plurality of second conductive paths, the second conductive paths each extend along a second direction, the first direction intersects the second direction, and a difference between resistance values of at least two of the second conductive paths is not greater than 15%.

In one embodiment, the difference between the resistance values of any two of the second conductive paths is not greater than 15%.

In one embodiment, the resistance values of the first conductive channel and the second conductive channel are not greater than 5 kilo-ohms.

In one embodiment, the intersection between the first conductive path and the second conductive path forms a node capacitance, and the difference between at least two node capacitances is no greater than 15%.

In one embodiment, the angle between the first direction and the second direction is 85-95 °.

In one embodiment, the first conductive via is filled with a first conductive mesh, the second conductive via is filled with a second conductive mesh, and the first conductive mesh and the second conductive mesh are both diamond-shaped.

In one embodiment, the display device further comprises a transparent substrate, the transparent substrate comprises a first surface and a second surface arranged opposite to the first surface, the first conductive layer is arranged on the first surface, and the second conductive layer is arranged on the second surface.

The application also provides a touch module, which comprises the conductive film and a cover plate, wherein the cover plate is attached to the conductive film.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the utility model. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

fig. 1 is a schematic structural diagram of a touch module according to an embodiment of the utility model;

fig. 2 is a schematic structural diagram of a conductive film of the touch module shown in fig. 1;

FIG. 3 is a schematic view of the conductive film shown in FIG. 2 from another perspective;

FIG. 4 is a schematic view of a partial structure of the conductive film shown in FIG. 2;

fig. 5 is a schematic structural view of a conductive film according to a second embodiment of the present application;

fig. 6 is a schematic structural view of a conductive film according to a third embodiment of the present application.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof.

Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

For convenience of description, spatially relative terms, such as "inner", "outer", "lower", "below", "upper", "above", and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" can include both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

It should be noted that, in the present application, a range represented by "one numerical value to another numerical value" is a general expression avoiding all numerical values in the range from being recited in the specification. Thus, recitation of a range of values herein is intended to encompass any value within the range and any smaller range defined by any value within the range, as if the range and smaller range were explicitly recited in the specification.

Referring to fig. 1, a touch module 10 according to an embodiment of the present disclosure includes a conductive film 100 and a cover plate 200, wherein the cover plate 200 is attached to the conductive film 100. In one embodiment, the cover plate 200 is made of glass.

Referring to fig. 2, the conductive film 100 includes a transparent substrate 110, a first conductive layer 120 and a second conductive layer 130, wherein the first conductive layer 120 and the second conductive layer 130 are stacked and insulated from each other. The transparent substrate 110 includes a first surface 111 and a second surface 112 opposite to the first surface, the first conductive layer 120 is disposed on the first surface 111, and the second conductive layer 130 is disposed on the second surface 112, i.e., the first conductive layer 120 and the second conductive layer 130 share the same transparent substrate 110, which can reduce the thickness of the conductive film 100 and make the conductive film 100 thinner and lighter.

In one embodiment, the transparent substrate 110 is a flexible substrate, for example, the material of the transparent substrate 110 is polyethylene terephthalate (PET), Polyimide (PI), transparent polyimide (CPI), Polycarbonate (PC), or polymethyl methacrylate (PMMA). In an embodiment, the transparent substrate 110 may have a single-layer structure or a composite structure formed by a plurality of different materials.

Referring to fig. 3 and 4, the first conductive layer 120 includes a plurality of first conductive vias 121, the plurality of first conductive vias 121 extend along the first direction X, and a difference between resistance values of at least two first conductive vias 121 is not greater than 15%. By controlling the difference in the resistance values of the first conductive paths 121, the accuracy of the positioning of the conductive film 100 can be improved. In an embodiment, the difference between the resistance values of any two first conductive channels 121 is not greater than 15%, so that the transmission conditions of the touch signals between the first conductive layers 121 are substantially the same, thereby avoiding the recognition error caused by the uneven influence of the resistance of the first conductive layers 121 on the touch signals, and further improving the positioning accuracy of the conductive film 100. In one embodiment, the difference between the resistance values of any two first conductive paths 121 is not greater than 10%. In one embodiment, the difference between the resistance values of any two first conductive paths 121 is not greater than 5%. In one embodiment, the difference between the resistance values of any two first conductive paths 121 is not greater than 1%. In one embodiment, the difference between the resistance values of all the first conductive paths 121 is not greater than 10%. In the illustrated embodiment, the first conductive vias 121 are rectangular strips, and the plurality of first conductive vias 121 are uniformly distributed on the first conductive layer 120.

Referring to fig. 2 and fig. 4, similarly, the second conductive layer 130 includes a plurality of second conductive paths 131, the plurality of second conductive paths 131 all extend along the second direction Y, the first direction X intersects the second direction Y, and a difference between resistance values of at least two of the second conductive paths 131 is not greater than 15%. In one embodiment, the difference between the resistance values of any two second conductive paths 131 is not greater than 15%. In one embodiment, the difference between the resistance values of all the second conductive paths 131 is not greater than 10%. In one embodiment, the difference between the resistance values of all the second conductive paths 131 is not greater than 5%. In one embodiment, the difference between the resistance values of all the second conductive paths 131 is not greater than 1%. In one embodiment, all the second conductive paths 131 have the same resistance value.

It should be noted that, in the present application, the first conductive channel 121 and the second conductive channel 131 are both located in the visible region of the touch module 10, and the resistance value thereof also refers to a resistance value located in the visible region, and does not include a resistance value of the non-visible region, such as a resistance value of the lead region.

In one embodiment, the resistance values of the first conductive path 121 and the second conductive path 131 are not greater than 5 kohms. For example, in a 86-inch conductive film, the resistance values of the first conductive path 121 and the second conductive path 131 are not greater than 2 kohms, and the measured resistance values are 1.42 kohms, 1.46 kohms, 1.50 kohms, 1.57 kohms, and 1.52 kohms.

With continued reference to FIG. 4, the angle between the first direction X and the second direction Y is 85-95 deg. In the illustrated embodiment, the first direction X is a transverse axis direction, the second direction Y is a longitudinal axis direction, and an included angle between the first direction X and the second direction Y is 90 °.

In one embodiment, the intersection between the first conductive layer 120 and the second conductive layer 130 forms a node capacitance, and the difference between at least two node capacitances is no greater than 15%. In one embodiment, the difference between the capacitances of all nodes is not greater than 15%.

With reference to fig. 4, the first conductive vias 121 are filled with the first conductive grids 122, the second conductive vias 131 are filled with the second conductive grids 132, and the first conductive grids 122 and the second conductive grids 132 are diamond-shaped. Of course, in other embodiments, the first conductive mesh 122 and the second conductive mesh 132 may also take other shapes, such as regular shapes like triangle, rectangle, trapezoid, etc., or may also take irregular shapes.

With continued reference to fig. 2, the first conductive grid 122 and the second conductive grid 132 are recessed structures. Of course, the first conductive grid 122 and the second conductive grid 132 may also be raised structures. The structure of the first conductive mesh 122 may be the same as that of the second conductive mesh 132, such as both raised structures or both recessed structures; it may also be different, such as the first conductive mesh 122 being in a raised configuration and the second conductive mesh 132 being in a recessed configuration, or vice versa.

Referring to fig. 5, the conductive film 100a of the second embodiment of the present application has substantially the same structure as the conductive film 100 of the first embodiment, and the difference is mainly that: the conductive film 100a includes a first transparent substrate 110a and a second transparent substrate 140a, the first transparent substrate 110a includes a first surface 111a and a second surface 112a opposite to the first surface 111a, the second transparent substrate 140a includes a third surface 141a and a fourth surface 142a opposite to the third surface 141a, the first conductive layer 120a is disposed on the first surface 111a, the second conductive layer 130a is disposed on the third surface 141a, and the second surface 112a of the first transparent substrate 110a and the fourth surface 142a of the second transparent substrate 140a are connected by an adhesive layer.

The touch module of the second embodiment of the present application has substantially the same structure as the touch module 10 of the first embodiment, except that: the touch module of the second embodiment employs the conductive film 100a of the second embodiment.

Referring to fig. 6, the conductive film 100b of the third embodiment of the present application has substantially the same structure as the conductive film 100a of the second embodiment, and the difference is mainly that: the first conductive layer 120b is disposed on the second surface 112b of the first transparent substrate 110b, the second conductive layer 130b is disposed on the fourth surface 142b of the second transparent substrate 140b, the second surface 112b of the first transparent substrate 110b is connected to the fourth surface 142b of the second transparent substrate 140b by an adhesive layer, and the adhesive layer insulates the first conductive layer 120b from the second conductive layer 130 b.

The touch module of the third embodiment of the present application has substantially the same structure as the touch module of the second embodiment, except that: the touch module of the third embodiment employs the conductive film 100b of the third embodiment.

In the present application, the first conductive layer and the second conductive layer may also be stacked in other manners, for example, the first conductive layer is disposed on the first surface of the transparent substrate, and the second conductive layer is disposed on the surface of the first conductive layer away from the first surface; for another example, the first conductive layer is disposed on one transparent substrate, the second conductive layer is disposed on another transparent substrate, and the surface of the first conductive layer away from the transparent substrate is connected to the surface of another transparent substrate away from the second conductive layer through an adhesive layer.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. A conductive film, comprising a first conductive layer, wherein the first conductive layer comprises a plurality of first conductive paths, each of the plurality of first conductive paths extends along a first direction, and a difference between resistance values of at least two of the first conductive paths is not greater than 15%.

2. The conductive film of claim 1, wherein the difference between the resistance values of any two of the first conductive paths is no greater than 15%.

3. The conductive film according to claim 1, further comprising a second conductive layer provided in a stacked manner with the first conductive layer, wherein the second conductive layer comprises a plurality of second conductive paths each extending in a second direction, wherein the first direction intersects the second direction, and wherein at least two of the second conductive paths have a difference in resistance value of not more than 15%.

4. The conductive film of claim 3, wherein the difference between the resistance values of any two of the second conductive paths is no greater than 15%.

5. The conductive film of claim 3, wherein the resistance values of the first conductive path and the second conductive path are not greater than 5 kilo-ohms.

6. The conductive film of claim 3, wherein an intersection between the first conductive via and the second conductive via forms a node capacitance, at least two of the node capacitances differing by no more than 15%.

7. The conductive film of claim 3 wherein the angle between the first direction and the second direction is from 85 ° to 95 °.

8. The conductive film of claim 3, wherein the first conductive via is filled with a first conductive mesh, the second conductive via is filled with a second conductive mesh, and the first conductive mesh and the second conductive mesh are diamond-shaped.

9. The conductive film according to claim 3, further comprising a transparent substrate, wherein the transparent substrate comprises a first surface and a second surface disposed opposite to the first surface, the first conductive layer is disposed on the first surface, and the second conductive layer is disposed on the second surface.

10. A touch module comprising the conductive film of any one of claims 1 to 9 and a cover plate, wherein the cover plate is attached to the conductive film.

Images