CN212781960U - Touch panel and touch device - Google Patents
Touch panel and touch device Download PDFInfo
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- CN212781960U CN212781960U CN202020532357.5U CN202020532357U CN212781960U CN 212781960 U CN212781960 U CN 212781960U CN 202020532357 U CN202020532357 U CN 202020532357U CN 212781960 U CN212781960 U CN 212781960U
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Abstract
The application provides a touch panel the touch panel includes: a substrate; the touch screen comprises a substrate and at least two touch conductive layers, wherein the at least two touch conductive layers are borne on one side of the substrate, the at least two touch conductive layers have different bending resistance or different manufacturing processes, and the at least two touch conductive layers are electrically connected. By means of the combination of the multiple layers of conductive structures, due to the fact that the at least two touch conductive layers are electrically connected, when a certain part of one touch conductive layer is damaged or slightly broken to cause open circuit, current can flow through the touch conductive layer connected with the damaged or slightly broken part, so that a normal touch function is achieved, and the product yield is improved.
Description
Technical Field
The present disclosure relates to the field of touch technologies, and in particular, to a touch panel and a touch device.
Background
Flexible and foldable touch screens are one of the important research directions in the field of touch technology at present. The traditional touch screen adopts a transparent conductive film, so that the display function is realized while normal touch is performed. However, the conventional transparent conductive film has a limitation in using as a bending material. For example, in the bendable transparent conductive film and the touch control manufacturing process, the transparent conductive film has random defects; for another example, in the bending process, the conventional non-bending transparent conductive film has a micro-fracture problem, which results in that the touch function cannot be normally implemented.
SUMMERY OF THE UTILITY MODEL
The application discloses touch panel can improve the yield of product when realizing normally buckling and showing.
In a first aspect, the present application provides a touch panel comprising:
a substrate; and
the touch screen comprises at least two touch conductive layers, wherein the at least two touch conductive layers are borne on one side of the substrate, the at least two touch conductive layers have different bending resistance or different manufacturing processes, and the at least two touch conductive layers are electrically connected.
By means of the combination of the multiple layers of conductive structures, due to the fact that the at least two touch conductive layers are electrically connected, when a certain part of one touch conductive layer is damaged or slightly broken to cause open circuit, current can flow through the touch conductive layer connected with the damaged or slightly broken part, so that a normal touch function is achieved, and the product yield is improved.
In a second aspect, the present application also provides a touch device comprising the touch panel according to the first aspect.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for a person skilled in the art to obtain other drawings based on the drawings without any inventive exercise.
Fig. 1 is a schematic top view of a touch panel according to a first embodiment of the present disclosure.
Fig. 2 is a schematic sectional view taken along line I-I in fig. 1.
Fig. 3 is a schematic top view of a touch panel according to an embodiment of the present application.
Fig. 4 is a schematic sectional view taken along line II-II in fig. 3.
Fig. 5 is a schematic top view of a touch panel according to an embodiment of the present application.
Fig. 6 is a schematic sectional view taken along line III-III in fig. 5.
Fig. 7 is a schematic top view of a touch device according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application.
Fig. 1 and 2 are combined, and fig. 1 is a schematic top view of a touch panel according to a first embodiment of the present disclosure; fig. 2 is a schematic sectional view taken along line I-I in fig. 1. The touch panel 1 includes: the substrate 11 and at least two touch conductive layers 12. The at least two touch conductive layers 12 are supported on one side of the substrate 11, and the at least two touch conductive layers 12 have different bending resistance. The at least two touch conductive layers 12 are electrically connected.
Specifically, fig. 2 is only illustrated that the number of the touch conductive layers 12 is 2, and the number of the touch conductive layers 12 may also be a positive integer greater than or equal to 2, which is not limited in this application.
Specifically, as shown in fig. 1, the patterned touch conductive layer 12 has a plurality of stripe channels, and the stripe channels are electrically connected to a processor, so that for convenience of description and visual observation of the structure of the touch conductive layer 12, the processor will not be described in the following description and the drawings.
Specifically, the touch panel 1 may be applied to a flexible and foldable device, and may also be applied to other non-foldable devices, and the application of the touch panel 1 to the flexible and foldable device is taken as an example, and does not represent that an application scenario of the touch panel 1 is limited. By flexibly foldable device is meant that a portion of the flexibly foldable device may be bent to switch between a bent and an unfolded state.
Specifically, the touch conductive layers 12 have bending resistance, which means whether the touch conductive layers 12 are easily bent, broken, and the like when the touch conductive layers 12 are bent. The bending resistance of the touch conductive layer 12 is determined by factors such as the manufacturing line width of the material, the property of the material itself, and the like, for example, when the line width is thick, abnormal display and fracture may occur during folding, which is not favorable for folding of the device; for another example, Silver Nano Wire (SNW) material has better bending and stretching ability than Indium Tin Oxide (ITO) material. It should be noted that, in the present application, the touch conductive layer 12 is illustrated as being made of a transparent conductive material, but the touch conductive layer 12 may also be made of a non-transparent conductive material, for example, a metal mesh conductive layer made of a metal material, and the present application is not limited thereto.
It can be understood that, in the present embodiment, due to the electrical connection between the at least two touch conductive layers 12, when a defect or a micro fracture occurs on one portion of one touch conductive layer 12 to cause an open circuit, a current can flow through the other portion of the touch conductive layer 12 connected to the defect or the micro fracture portion to achieve a normal touch function, thereby improving the yield of products.
In one possible embodiment, please refer to fig. 1 and fig. 2 again. The at least two touch conductive layers 12 are patterned, and an orthographic projection of a single touch conductive layer 12 on a plane where the substrate 11 is located is at least partially overlapped with an orthographic projection of the rest of the touch conductive layers 12 on the plane.
Typically, the same mask is used to pattern the at least two touch conductive layers 12, and the mask exposes corresponding portions of the at least two touch conductive layers 12 to the etchant for patterning. In other words, the patterns of the at least two touch conductive layers 12 are the same. If the patterns of the at least two touch conductive layers 12 are different, the touch points may not be correctly identified.
Specifically, an orthogonal projection of a single touch conductive layer 12 on the plane of the substrate 11 is at least partially overlapped with an orthogonal projection of the rest of touch conductive layers 12 on the plane, so that touch points of each touch conductive layer 12 can be detected to be consistent. It can be understood that, in the present embodiment, the patterns of the at least two touch conductive layers 12 are the same, and the touch points detected by each touch conductive layer 12 are the same, so that the touch function of the touch panel 1 can be prevented from being abnormal.
In a possible embodiment, please refer to fig. 3 and fig. 4 together, fig. 3 is a schematic top view of a touch panel according to an embodiment of the present disclosure; fig. 4 is a schematic sectional view taken along line II-II in fig. 3. The at least two touch conductive layers 12 include a first material layer 121 and a second material layer 122. The first material layer 121 is carried on the substrate 11, and the second material layer 122 is carried on the first material layer 121 and electrically connected to the first material layer 121.
Specifically, the first material layer 121 and the second material layer 122 have different materials or structures, so that the first material layer 121 and the second material layer 122 have different bending resistance and defect conditions. In general, the first material layer 121 and the second material layer 122 both have conductivity, so that the second material layer 122 carried on the first material layer 121 can be electrically connected to the first material layer 121.
In one possible embodiment, the first material layer 121 is an ITO conductive layer, and the second material layer 122 is a nano silver conductive layer.
Specifically, because the traditional ITO material has poor bending resistance, when the ITO material is used as a transparent conductive layer material of flexible foldable equipment, an ITO conductive layer with a smaller line width can be manufactured, so that the bending resistance of the ITO conductive layer is improved. However, minor breakage may still occur when the device is folded. The SNW material is a transparent conductive layer material of the mainstream flexible foldable equipment at present, but in the process of producing the nano silver conductive layer by the SNW material process, the nano silver conductive layer is easy to have random defects, and the manufacturing line width is limited. It can be understood that, in the embodiment, the ITO conductive layer and the nano silver conductive layer complement each other, so that the yield of the touch panel 1 product is improved. When a certain part of the ITO conducting layer is subjected to micro fracture due to folding, current can flow through the nano silver conducting layer; when a random defect is generated in a certain part of the nano-silver conducting layer by a production process, current can flow through the ITO conducting layer.
Specifically, in the present embodiment, an ITO material is formed on the substrate 11 by sputtering to form the first material layer 121, an SNW material is coated on the first material layer 121 to form the second material layer 122, and the first material layer 121 and the second material layer 122 are patterned.
Since the bending resistance of the ITO conductive layer is lower than that of the nano silver conductive layer, preferably, the present embodiment is suitable for the device in which the substrate 11 is folded away from the first material layer 121 and the second material layer 122. Because the second material layer 122 is far away from the neutral plane, the extrusion/stretching force applied to the second material layer is greater than that applied to the first material layer 121, so that when the equipment is folded outwards or is not applied by a limited external force, the nano silver conductive layer with better bending resistance is selected as the second material layer 122, and the nano silver conductive layer is better and more suitable for the existing process.
In one possible embodiment, the first material layer 121 is a nano-silver conductive layer, and the second material layer 122 is an ITO conductive layer.
Specifically, the difference between the present embodiment and the previous embodiment is that the SNW material is coated on the substrate 11 to form the first material layer 121, an ITO material is formed on the first material layer 121 by sputtering to form the second material layer 122, and the first material layer 121 and the second material layer 122 are patterned.
It can be understood that, since the bending resistance of the ITO conductive layer is lower than that of the nano-silver conductive layer, it is preferable that, when the device is folded inwards or some ITO conductive layers are subjected to an overrun external force, i.e. the ITO conductive layer is broken with a high probability, the nano-silver conductive layer with better bending resistance is selected as the first material layer 121 to reduce stress and protect the connectivity of the conductive layer, and the ITO conductive layer is broken only at a bent or stressed position and protects the nano-silver conductive layer from being damaged at the rest non-bent or stressed position.
It can be understood that, since the etchant composition of the ITO material is different from that of the SNW material, two etching processes are required to pattern the first material layer 121 and the second material layer 122. Preferably, the first material layer 121 and the second material layer 122 may be etched simultaneously by using a laser etching process, so as to save the cost of the etching process.
In one possible embodiment, the first material layer 121 is a metal mesh conductive layer, and the patterned shape of the second material layer 122 is the same as the patterned shape of the first material layer 121.
Specifically, in this embodiment, a metal mesh film without a channel pattern is fabricated on the substrate 11, the metal mesh conductive layer is formed, and the second material layer 122 is formed by applying an SNW material to the metal mesh conductive layer. When the SNW material is coated on the metal mesh conductive layer, the SNW material may be electrically connected through the metal wires in the metal mesh film to achieve electrical connection between the first material layer 121 and the second material layer 122. The first material layer 121 and the second material layer 122 may be patterned by disposing a patterned photo mask layer on a side of the second material layer 122 facing away from the substrate 11. Of course, in other possible embodiments, the second material layer 122 may also be made of ITO material.
As can be understood, for the self-capacitance type touch device, the capacitance variation generated by the metal mesh conductive layer is limited, so that the touch point position cannot be accurately identified. In this embodiment, the second material layer 122 is laid on the metal mesh conductive layer, so that the touch point identification of the device can be improved, and the second material layer 122 is electrically connected to the metal mesh conductive layer, which can improve the yield of the product as described in the above embodiments.
In a possible embodiment, please refer to fig. 5 and fig. 6 together, fig. 5 is a schematic top view of a touch panel according to an embodiment of the present disclosure; fig. 6 is a schematic sectional view taken along line III-III in fig. 5. The touch panel 1 further includes a protection layer 13, and the protection layer 13 is disposed on the outermost side of the at least two touch conductive layers 12 away from the substrate 11.
Since the touch panel 1 is usually applied to a display device, and the touch panel 1 is disposed corresponding to a display screen of the display device, the protection layer 13 is made of a transparent material, such as a resin polymer. Meanwhile, the protective layer 13 is disposed on the outermost side of the at least two touch conductive layers 12 away from the substrate 11, and the protective layer 13 covers the at least two touch conductive layers 12, so that short circuit between the at least two touch conductive layers 12 and other circuits can be prevented.
Fig. 7 is a schematic top view of a touch device 2 according to an embodiment of the present disclosure. The touch device 2 includes the touch panel 1 as described above, and the touch panel 1 please refer to the above description, which is not described herein again.
Specifically, in a possible embodiment, the touch device 2 further includes a bendable region 21 and a non-bendable region 22, the at least two touch conductive layers 12 are disposed in the bendable region 21, and the non-bendable region 21 is disposed with a single touch conductive layer 12.
It should be noted that, in this embodiment, the touch device 2 may be a foldable device. When the number of the bendable regions 21 is 1 and the number of the non-bendable regions 22 is 2, the 2 non-bendable regions 22 may be disposed symmetrically to the bendable regions 21 or asymmetrically to the bendable regions 21. When the number of the bendable regions 21 is at least two or more, the bendable regions 21 are disposed at intervals, and the non-bendable region 22 is disposed between two adjacent bendable regions 21. Of course, the bending direction of the bendable region 21 may be to fold the touch panel 1 inward, or to fold the touch panel 1 outward. Taking fig. 7 as an example, since the non-bending region 22 is not bent, the touch conductive layers 12 located in the non-bending region 22 are not easily broken, the overlapped portion of the at least two touch conductive layers 12 can be disposed in the bendable region 21, and the non-bending region 21 is disposed with a single touch conductive layer 12, so as to save material cost.
It can be understood that when the touch device 2 is bent, since the conductive layer in this manner can ensure the bending performance, the smaller the length of the bent portion of the touch conductive layer 12 is, the smaller the probability that the bending-resistant conductive layer 12 is damaged and cannot be covered due to the breakage of the non-bending-resistant conductive layer is correspondingly reduced. In the present embodiment, in order to improve the yield of the product, the length of the bendable region 21 along the bending direction is greater than or equal to the half perimeter (pi x r) of the bending radius, where pi is the circumferential ratio and r is the bending radius.
The principle and the implementation of the present application are explained herein by applying specific examples, and the above description of the embodiments is only used to help understand the core idea of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (10)
1. A touch panel, comprising:
a substrate; and
the touch screen comprises at least two touch conductive layers, wherein the at least two touch conductive layers are borne on one side of the substrate, the at least two touch conductive layers are different in bending resistance or manufacturing process, and the at least two touch conductive layers are electrically connected.
2. The touch panel of claim 1, wherein the at least two touch conductive layers are patterned, and an orthogonal projection of a single touch conductive layer on a plane of the substrate at least partially coincides with an orthogonal projection of the remaining touch conductive layers on the plane.
3. The touch panel of claim 1, wherein the at least two touch conductive layers comprise a first material layer and a second material layer, the first material layer is carried on the substrate, and the second material layer is carried on the first material layer and is electrically connected to the first material layer.
4. The touch panel of claim 3, wherein the first material layer is an ITO conductive layer and the second material layer is a nano-silver conductive layer.
5. The touch panel of claim 3, wherein the first material layer is a nano-silver conductive layer and the second material layer is an ITO conductive layer.
6. The touch panel of claim 3, wherein the first material layer is a metal mesh conductive layer, and the patterned shape of the second material layer is the same as the patterned shape of the first material layer.
7. The touch panel of claim 1, further comprising a protective layer disposed on an outermost side of the at least two touch conductive layers facing away from the substrate.
8. A touch device, characterized in that the touch device comprises the touch panel according to any one of claims 1 to 7.
9. The touch device of claim 8, wherein the touch device comprises a bendable region and a non-bendable region, the at least two touch conductive layers are disposed in the bendable region, and the non-bendable region is disposed with a single touch conductive layer.
10. The touch device of claim 9, wherein the line width of the at least two touch conductive layers is less than 100 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020532357.5U CN212781960U (en) | 2020-04-10 | 2020-04-10 | Touch panel and touch device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020532357.5U CN212781960U (en) | 2020-04-10 | 2020-04-10 | Touch panel and touch device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212781960U true CN212781960U (en) | 2021-03-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020532357.5U Active CN212781960U (en) | 2020-04-10 | 2020-04-10 | Touch panel and touch device |
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| Country | Link |
|---|---|
| CN (1) | CN212781960U (en) |
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- 2020-04-10 CN CN202020532357.5U patent/CN212781960U/en active Active
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Effective date of registration: 20220511 Granted publication date: 20210323 |