CN210804364U - Touch panel and display device - Google Patents
Touch panel and display device Download PDFInfo
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- CN210804364U CN210804364U CN202020128178.5U CN202020128178U CN210804364U CN 210804364 U CN210804364 U CN 210804364U CN 202020128178 U CN202020128178 U CN 202020128178U CN 210804364 U CN210804364 U CN 210804364U
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Abstract
The utility model provides a touch panel and display device, this touch panel includes: the touch screen comprises a substrate, a touch screen and a touch screen, wherein the substrate comprises a visible touch area and a peripheral circuit area; the touch screen comprises a plurality of first electrodes and a plurality of second electrodes, wherein the plurality of first electrodes are arranged in a visible touch area of a substrate and extend along a first direction, the plurality of second electrodes extend along a second direction, and the plurality of first electrodes and the plurality of second electrodes are formed by metal grids; and a plurality of metal leads disposed in the peripheral circuit region of the substrate, the plurality of first electrodes and the plurality of second electrodes being electrically connected to the plurality of metal leads, respectively, wherein the metal leads are printed from nanoscale metal powder by a 3D printing technique. The border of the touch panel can be narrowed by arranging a plurality of metal leads printed by a 3D printing technology in the peripheral circuit area of the substrate.
Description
Technical Field
The utility model relates to a show technical field, concretely relates to touch panel and display device.
Background
At present, the development trend of the touch display industry is towards the direction of a narrow frame, and the size of a display area of a touch display panel can be increased by the design of the narrow frame, so that better visual aesthetic feeling is brought to a user. For the touch display panel integrated with the touch function, a large number of metal leads are arranged on the frame part of the touch display panel, and the metal leads are connected with the driving chip or the flexible circuit board and used for transmitting touch signals for touch electrodes of the display area. However, due to the limitation of the line width of the metal lead, the narrow frame design of the touch display panel has limitations.
SUMMERY OF THE UTILITY MODEL
In view of this, embodiments of the present invention are directed to providing a touch panel and a display device, which can narrow a frame of the touch panel by providing a plurality of metal leads printed by a 3D printing technology in a peripheral circuit area of a substrate.
According to the utility model discloses an aspect provides a touch panel, include: the touch screen comprises a substrate, a touch screen and a touch screen, wherein the substrate comprises a visible touch area and a peripheral circuit area; the touch screen comprises a plurality of first electrodes and a plurality of second electrodes, wherein the plurality of first electrodes are arranged in a visible touch area of a substrate and extend along a first direction, the plurality of second electrodes extend along a second direction, and the plurality of first electrodes and the plurality of second electrodes are formed by metal grids; and a plurality of metal leads disposed in the peripheral circuit region of the substrate, wherein the plurality of first electrodes and the plurality of second electrodes are electrically connected to the plurality of metal leads, respectively.
In one embodiment, the plurality of metal leads are printed from nanoscale metal powder using 3D printing techniques.
In one embodiment, the width of the metal lead is no greater than 15 μm or no greater than 10 μm.
In one embodiment, the metal leads are printed from 10nm to 100nm metal powder.
In one embodiment, the metal powder comprises copper or silver.
In one embodiment, the substrate includes a first substrate, the plurality of first electrodes are disposed on a first surface of the first substrate, and the plurality of second electrodes are disposed on a second surface of the first substrate opposite the first surface.
In one embodiment, the substrate includes a first substrate and a second substrate, the plurality of first electrodes are disposed on the first substrate, and the plurality of second electrodes are disposed on the second substrate.
In one embodiment, the substrate includes a first substrate, and the plurality of first electrodes and the plurality of second electrodes are stacked on any surface of the first substrate by a bridging manner.
In one embodiment, the touch panel further comprises a cover plate attached to the substrate; wherein any one of the substrate and the cover plate is made of a hard material or a polymer material.
In one embodiment, the hard material is selected from glass; the high polymer material is selected from polyimide, polyethylene terephthalate, polycarbonate or polyurethane.
According to the utility model discloses an on the other hand provides a display device, includes: the touch panel according to any of the above embodiments; and the touch control chip is electrically connected with the touch control panel.
According to the utility model discloses a further aspect of the embodiment provides a preparation method of touch panel, includes: preparing a substrate, wherein the substrate comprises a visible touch area and a peripheral circuit area; preparing a plurality of first electrodes extending along a first direction and a plurality of second electrodes extending along a second direction in a visible touch area of the substrate, wherein the plurality of first electrodes and the plurality of second electrodes are formed by metal grids; arranging alignment targets at the ends of the first electrodes and the second electrodes; aligning the 3D printer to the alignment target by using an image alignment system; and the 3D printer is used for carrying out spray printing on the peripheral circuit area of the substrate according to the received preset circuit pattern so as to form a plurality of metal leads electrically connected with the end parts of the plurality of first electrodes and the plurality of second electrodes, wherein the width of the plurality of metal leads is not more than 15 mu m or not more than 10 mu m.
In one embodiment, before the 3D printer prints the pattern, the preparation method further includes: loading printing raw materials in the 3D printer; wherein the printing material includes copper powder or silver powder of 10nm to 100 nm.
The embodiment of the utility model provides a touch panel, through all round circuit district settings at the base plate print many metal lead wires that form through 3D printing technique, can make touch panel's frame narrow.
Drawings
Fig. 1 is a schematic structural diagram of a top view direction of a touch panel according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a main view direction of a touch panel according to an embodiment of the present invention.
Fig. 3 to 6 are schematic structural diagrams illustrating a front view direction of a touch panel according to another embodiment of the present invention.
Fig. 7 and 8 are schematic structural diagrams illustrating a front view direction of a touch panel according to still another embodiment of the present invention.
Fig. 9 is a schematic structural view of a main view direction of a touch panel according to another embodiment of the present invention.
Fig. 10 is a schematic flow chart illustrating a manufacturing method of a touch panel according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Fig. 1 is a schematic structural diagram of a top view direction of a touch panel according to an embodiment of the present invention, as shown in fig. 1, the touch panel includes: the touch screen comprises a substrate 12, wherein the substrate 12 comprises a visible touch area and a peripheral circuit area; a plurality of first electrodes 13 extending in a first direction a and a plurality of second electrodes 14 extending in a second direction B, which are disposed in a visible touch region of the substrate 12, the plurality of first electrodes 13 and the plurality of second electrodes 14 being formed of a metal mesh; and a plurality of metal leads 15 disposed in the peripheral circuit region of the substrate 12, wherein the plurality of first electrodes 13 and the plurality of second electrodes 14 are electrically connected to the plurality of metal leads 15, respectively.
It should be understood that the first electrode 13 and the second electrode 14 may be any one of a sensing electrode and a driving electrode, and when the first electrode 13 is the sensing electrode, the second electrode 14 is the driving electrode; when the first electrode 13 is a driving electrode, the second electrode 14 is a sensing electrode, which is not limited in the embodiment of the present invention. It should be understood that the plurality of first electrodes 13 and the plurality of second electrodes 14 are disposed in a visible touch area of the substrate 12, where the visible touch area refers to a central area of the substrate 12 and is equivalent to a display area of a touch screen; a plurality of metal leads 15 are arranged in a peripheral wiring region of the substrate 12, which is an edge region surrounding a central region of the substrate 12. A first electrode 13 is electrically connected to a metal lead 15, and a second electrode 14 is electrically connected to a metal lead 15, so that the plurality of metal leads 15 are collected at the center of a side surface (which may be the upper side, the lower side, the left side or the right side of the touch panel) of the touch panel to be connected to the touch chip, thereby connecting the first electrode and the second electrode to the touch chip.
It should be understood that the first electrode 13 and the second electrode 14 in the touch panel are both made of the same material, i.e. metal mesh. Since the metal mesh forms the first electrode and the second electrode using a metal material having extremely low resistance, the first electrode and the second electrode can be thinned.
In one embodiment, the metal mesh may be made of copper or silver. It should be understood that the metal mesh may be made of a readily available and inexpensive material such as a metallic material such as silver, copper, or an oxide. The material of the metal grid is preferably pure metal copper because of its good conductivity and low cost.
It should be noted that the embodiments of the present invention do not limit the metal material from which the metal mesh is specifically made.
In an embodiment, the metal leads 15 are formed by printing nano-scale metal powder through a 3D printing technology, and the plurality of metal leads 15 obtained through 3D printing can be thinned, so that the frame of the touch panel can be narrowed.
It should be understood that the plurality of first electrodes 13 extend along the first direction a, any two adjacent first electrodes 13 are not connected to each other, the plurality of second electrodes 14 extend along the second direction B, and any two adjacent second electrodes 14 are not connected to each other. It should be noted that, the embodiment of the present invention does not limit the actual contour structure of the first electrode 13 and the second electrode 14, and the contour structure may be a bar shape, a diamond shape or a triangle shape, and those skilled in the art can design the contour structure of the first electrode 13 and the second electrode 14 according to the actual application requirement; meanwhile, the embodiment of the present invention also does not limit the actual internal patterns of the first electrode 13 and the second electrode 14, the internal patterns may be various types of grids, and those skilled in the art may design the internal patterns of the first electrode 13 and the second electrode 14 according to the actual application requirement.
It should also be understood that the first direction a or the second direction B may be an X-axis direction (transverse direction) or a Y-axis direction (longitudinal direction), i.e., when the first direction a is the X-axis direction (transverse direction), the second direction B refers to the Y-axis direction (longitudinal direction), and when the first direction a is the Y-axis direction (longitudinal direction), the second direction B refers to the X-axis direction (transverse direction). It should be noted that, the embodiment of the present invention does not limit the specific distribution direction of the first electrode 13 and the second electrode 14, and those skilled in the art can design the extending direction of the first electrode 13 and the second electrode 14 according to the actual application requirement.
It should be noted that the embodiment of the present invention also does not limit the specific positional relationship between the first electrode 13, the second electrode 14 and the substrate 12, and those skilled in the art can design them according to the actual application requirements. Meanwhile, the embodiment of the present invention does not limit the specific number of the substrates 12, the number of the substrates 12 may be one or two, and those skilled in the art may set the number of the substrates 12 according to the actual application requirement.
In one embodiment of the present invention, the width of the metal lead is not more than 15 μm or not more than 10 μm.
It is to be understood that the width of the metal leads printed by the 3D printing technique is not more than 15 μm or not more than 10 μm. For example, the width of the metal lead is 8 μm to 15 μm, and the thickness is 3 μm to 8 μm, so that the frame of the touch panel can be narrowed, and thus the touch panel with a narrow frame can be realized.
In one embodiment of the present invention, the metal lead is formed by printing metal powder of 10nm to 100nm, and the metal powder includes copper or silver.
It should be understood that when printing metal leads by 3D printing techniques, the 3D printer will print the metal leads using nanoscale conductor powder, e.g., 10nm to 100nm metal powder, which may be silver or copper, etc.
In an embodiment of the present invention, as shown in fig. 2, the substrate includes a first substrate 121, a plurality of first electrodes 13 are disposed on a first surface of the first substrate 121, and a plurality of second electrodes 14 are disposed on a second surface of the first substrate 121 opposite to the first surface.
It should be understood that the first surface and the second surface refer to the upper and lower surfaces of the first substrate 121, but the embodiment of the invention does not limit whether the first surface and the second surface specifically refer to the upper surface or the lower surface of the first substrate 121, and when the first surface refers to the upper surface of the first substrate 121, the second surface refers to the lower surface of the first substrate 121, and when the first surface refers to the lower surface of the first substrate 121, the second surface refers to the upper surface of the first substrate 121. In other words, the first electrode 13 and the second electrode 14 may be disposed on the upper surface of the first substrate 121 or the lower surface of the first substrate 121, which is not limited in the embodiment of the present invention.
It should also be understood that the specific positional relationship among the first electrode 13, the second electrode 14 and the first substrate 121 means that the first electrode 13, the second electrode 14 and the first substrate 121 are stacked, and the first substrate 121 separates the first electrode 13 from the second electrode 14. The plurality of first electrodes 13 may be arranged on the first surface of the first substrate 121 in any profile structure and inner pattern; the plurality of second electrodes 14 may be arranged on the second surface of the first substrate 121 in any profile structure and internal pattern. The first electrode 13 and the second electrode 14 are respectively disposed on the upper surface and the lower surface of the first substrate 121, so that the overall thickness of the touch panel can be reduced, and the touch panel can be thinner.
In an embodiment of the present invention, as shown in fig. 3 to 6, the substrate includes a first substrate 121 and a second substrate 122, the plurality of first electrodes 13 are disposed on the first substrate 121, and the plurality of second electrodes 14 are disposed on the second substrate 122.
It should be noted that the embodiment of the present invention also does not limit the specific positional relationship among the first electrode 13, the second electrode 14, the first substrate 121, and the second substrate 122, as long as the first electrode 13 is disposed on any surface of the first substrate 121 with any contour structure and internal pattern, and the second electrode 14 is disposed on any surface of the second substrate 122 with any contour structure and internal pattern.
In one embodiment, as shown in fig. 3, the first substrate 121 and the second substrate 122 are disposed together between a plurality of first electrodes 13 and a plurality of second electrodes 14, the plurality of first electrodes 13 are disposed on an upper surface of the first substrate 121, and the plurality of second electrodes 14 are disposed on a lower surface of the second substrate 122.
In an embodiment, as shown in fig. 4 and 5, the second substrate 122 is spaced apart from the first substrate 121 by the plurality of first electrodes 13 or the plurality of second electrodes 14, but it is not limited whether the second substrate 122 is spaced apart from the first substrate 121 by the plurality of first electrodes 13 (e.g., shown in fig. 4) or the plurality of second electrodes 14 (e.g., shown in fig. 5). Specifically, as shown in fig. 4, a plurality of first electrodes 13 are arranged on the lower surface of the first substrate 121, and a plurality of second electrodes 14 are arranged on the lower surface of the second substrate 122; as shown in fig. 5, the plurality of first electrodes 13 are disposed on the upper surface of the first substrate 121, and the plurality of second electrodes 14 are disposed on the upper surface of the second substrate 122.
In one embodiment, as shown in fig. 6, the second substrate 122 is spaced apart from the first substrate 121 by a plurality of first electrodes 13 and a plurality of second electrodes 14, the plurality of first electrodes 13 are disposed on a lower surface of the first substrate 121, and the plurality of second electrodes 14 are disposed on an upper surface of the second substrate 122. Since the plurality of first electrodes 13 and the plurality of second electrodes 14 are disposed opposite to each other, when the first electrodes 13 and the second electrodes 14 are attached to each other, in order to insulate the plurality of first electrodes 13 from the plurality of second electrodes 14, the plurality of first electrodes 13 and the plurality of second electrodes 14 may be insulated from each other by bridging, for example, by disposing an insulating paste.
In summary, the first electrode 121 and the second substrate 122 are disposed such that the plurality of first electrodes 13 and the plurality of second electrodes 14 are disposed on the surfaces of different substrates, so that the plurality of first electrodes 13 and the plurality of second electrodes 14 can be simultaneously prepared on the surfaces of different substrates, thereby reducing the manufacturing time of the touch panel.
In an embodiment of the present invention, as shown in fig. 7 and 8, the substrate includes a first substrate 121, and the plurality of first electrodes 13 and the plurality of second electrodes 14 are stacked on any surface of the first substrate 121 in a bridging manner.
It should be understood that any surface of the first substrate 121 may refer to an upper surface or a lower surface of the first substrate 121, and the embodiment of the invention does not limit whether the plurality of first electrodes 13 and the plurality of second electrodes 14 are disposed on the upper surface or the lower surface of the first substrate 121. For example, as shown in fig. 7, a plurality of first electrodes 13 and a plurality of second electrodes 14 are arranged on the upper surface of the first substrate 121; as shown in fig. 8, a plurality of first electrodes 13 and a plurality of second electrodes 14 are arranged on the upper surface of the first substrate 121.
It should be noted that the embodiment of the present invention also does not limit the specific method for bridging, and the bridging may be performed by providing an insulating adhesive between the plurality of first electrodes 13 and the plurality of second electrodes 14, or may be performed by other methods as long as the plurality of first electrodes 13 and the plurality of second electrodes 14 can be insulated.
In one embodiment, the specific positional relationship among the first electrode 13, the second electrode 14 and the first substrate 121 is that the first electrode 13, the second electrode 14 and the first substrate 121 are stacked, and the first electrode 13 and the second electrode 14 are disposed on the surface of the same side of the first substrate 121. The plurality of first electrodes 13 and the plurality of second electrodes 14 may be arranged on the surface of the same side of the first substrate 121 in any contour structure and inner pattern, and an insulating paste is disposed between the plurality of first electrodes 13 and the plurality of second electrodes 14.
In summary, the first electrode 13 and the second electrode 14 are disposed on any surface of the first substrate 121, so that the overall thickness of the touch panel can be reduced, and the touch panel is thinner.
For any of the above embodiments, regardless of the structure of the touch panel, the first electrode and the second electrode are electrically connected to the plurality of metal leads, that is, the metal lead electrically connected to the first electrode and the first electrode are disposed in different areas (i.e., visible touch area and peripheral circuit area) of the same surface of the substrate, the metal lead electrically connected to the second electrode and the second electrode are disposed in different areas (i.e., visible touch area and peripheral circuit area) of the same surface of the substrate, and all the metal leads formed by the preparation are collected in the center of a certain side surface (i.e., upper side, lower side, left side or right side of the touch panel) of the touch panel to be connected to the touch chip, so that the first electrode and the second electrode are connected to the touch chip respectively.
In an embodiment of the present invention, as shown in fig. 9, the touch panel further includes a cover plate 11 attached to the substrate 12.
It should be understood that the cover plate 11 is disposed above the substrate 12 of the electrode to improve the impact resistance of the touch panel, thereby protecting the first electrode and the second electrode from being damaged when the touch panel is subjected to an impact force.
In one embodiment of the present invention, either one of the base plate and the cover plate is made of a hard material or a polymer material.
It should be understood that the substrate may be made of a hard material or a polymer material, the cover plate may also be made of a hard material or a polymer material, and the materials used for the substrate and the cover plate may be combined arbitrarily to form a touch panel composed of film layers of different materials.
It should also be understood that when the substrate and cover plate materials are made of hard materials, the overall hardness of the touch panel may be enhanced, thereby improving the impact resistance of the touch panel; when the substrate and the cover plate are made of high polymer materials, the touch panel is lighter and thinner and can be attached more easily.
In one embodiment of the invention, the hard material is selected from glass; the high molecular material is selected from polyimide, polyethylene terephthalate, polycarbonate or polyurethane.
It should be noted that the embodiment of the present invention does not limit the specific components of the hard material and the specific components of the polymer material, as long as the light transmittance of the touch panel can be satisfied.
The embodiment of the utility model provides a still provide a display device, it includes: the touch panel according to any of the above embodiments; and a touch control chip electrically connected with the touch control panel.
It should be understood that one sensing electrode in the touch panel is electrically connected to one end of one metal lead, and one driving electrode is electrically connected to one end of one metal lead, so that the formed metal leads are all collected at the center of one side of the touch panel (which may be the upper side, the lower side, the left side or the right side of the touch panel), and the other ends of the metal leads are connected to the touch chip, thereby electrically connecting the touch panel to the touch chip.
It should be noted that the embodiment of the present invention does not limit the specific type of the display device, and the display device may be a display terminal, such as a tablet computer, or a mobile communication terminal, such as a mobile phone terminal.
Fig. 10 is a schematic flow chart illustrating a manufacturing method of a touch panel according to an embodiment of the present invention. As shown in fig. 10, the preparation method includes:
s101: preparing a substrate, wherein the substrate comprises a visual touch area and a peripheral circuit area.
It should be understood that the visible touch area refers to a central area of the first substrate, which is equivalent to a display area of the touch screen; the peripheral routing area refers to an edge area surrounding a central area of the first substrate.
It should be noted that, the embodiment of the present invention does not limit the specific number of the substrates to be prepared, the number of the substrates may be one or two, and those skilled in the art can prepare the number of the substrates according to the actual application requirement, and meanwhile, the embodiment of the present invention does not limit the specific implementation process of how to prepare the substrates.
S102: a plurality of first electrodes extending along a first direction and a plurality of second electrodes extending along a second direction are prepared in a visible touch area of a substrate, and the first electrodes and the second electrodes are formed by metal grids.
It should be noted that the embodiment of the present invention does not limit the preparation sequence of the plurality of first electrodes and the plurality of second electrodes in the visible touch area of the substrate; the embodiment of the present invention also does not limit the actual contour structure of the first electrode and the second electrode, and the contour structure may be a bar shape, a diamond shape or a triangle shape, and those skilled in the art can prepare the contour structure of the first electrode and the second electrode according to the actual application requirement; the embodiment of the present invention also does not limit the actual internal patterns of the first electrode and the second electrode, the internal patterns can be various types of grids, and those skilled in the art can prepare the internal patterns of the first electrode and the second electrode according to the actual application requirements.
In one embodiment, the first electrodes and the second electrodes may be made of the same material, i.e. metal mesh, and the metal mesh may be made of metal material such as silver and copper, or oxide, which is easily available and cheap. Since the metal mesh forms the first electrode and the second electrode using a metal material having extremely low resistance, the first electrode and the second electrode can be thinned. Meanwhile, the material of the metal grid is preferably pure metal copper because the pure metal copper has good conductivity and low cost. It should be noted that the embodiment of the present invention does not limit the material from which the metal mesh is made.
It should be understood that the specific positional relationship between the first electrode, the second electrode and the substrate can be prepared according to the requirements of practical application. For example, when the substrate includes only the first substrate, the plurality of first electrodes are disposed on a first surface of the first substrate, and the plurality of second electrodes are disposed on a second surface of the first substrate opposite to the first surface; or a plurality of first electrodes and a plurality of second electrodes are stacked on any surface of the first substrate in a bridging manner. For example, when the substrate includes a first substrate and a second substrate, a plurality of first electrodes may be disposed on any surface of the first substrate, and a plurality of second electrodes may be disposed on any surface of the second substrate.
It should be noted that, the embodiment of the present invention is not limited to how to prepare the plurality of first electrodes and the plurality of second electrodes in the visible touch area of the substrate.
S103: and arranging alignment targets at the ends of the first electrodes and the second electrodes.
Specifically, after the first electrodes and the second electrodes are prepared on the surface of the substrate, alignment targets are arranged at the ends of the first electrodes and the second electrodes, and the alignment targets are used for accurately finding the positions of the first electrodes and the second electrodes so as to facilitate the subsequent 3D printing process.
It should be noted that the embodiment of the present invention is not limited to the specific implementation process of arranging the alignment targets at the ends of the plurality of first electrodes and the plurality of second electrodes.
S104: and aligning the 3D printer to the alignment target by using an image alignment system.
It should be noted that the embodiment of the present invention does not limit the specific implementation process of using the image alignment system to align the 3D printer to the alignment target.
S105: and the 3D printer performs spray printing on the peripheral circuit area of the first substrate according to the received preset circuit pattern to form a plurality of metal leads electrically connected with the end parts of the first electrodes and the second electrodes, wherein the width of the metal leads is not more than 15 mu m or not more than 10 mu m.
Specifically, after the 3D printer is aligned with the alignment target, the 3D printer may send a predetermined circuit pattern to the receiving terminal, and the 3D printer may perform a spray printing pattern corresponding to the predetermined circuit pattern on the peripheral circuit region based on programming or modeling, and finally place the peripheral circuit region in an oven for drying, so as to print a plurality of metal leads having a width not greater than 15 μm or not greater than 10 μm, such as a width of 8 μm to 15 μm and a thickness of 3 μm to 8 μm, electrically connected to the end portions of the plurality of first electrodes and the plurality of second electrodes.
Therefore, the 3D printer can print a plurality of metal leads with the width of 8-15 μm and the thickness of 3-8 μm according to the preset circuit pattern by means of programming or modeling and the like. However, the embodiment of the present invention does not limit the specific programming or modeling method, and does not limit the preset circuit pattern.
In one embodiment, the method further includes preparing a cover plate attached over the substrate on which the first and second electrodes are prepared. However, the embodiment of the present invention is not limited to the specific implementation process of attaching the cover plate on the substrate having the first electrode and the second electrode.
In one embodiment of the present invention, the first electrodes and the second electrodes are prepared by a yellow light process.
It should be understood that the first electrode layer and the second electrode layer may be first prepared on the surface of the first substrate, and then the plurality of first electrodes and the plurality of second electrodes may be prepared on the surface of the first substrate using a photolithography process. It should be noted that, the embodiment of the present invention is not limited to the specific implementation process of preparing the first electrode layer and the second electrode layer, and the first electrode layer and the second electrode layer may be prepared by sputtering or the like.
In one embodiment, the photolithography process specifically refers to exposing, developing and curing portions of the first electrode layer and the second electrode layer according to a predetermined profile structure and an internal pattern, so as to retain the portions, which are the first electrode and the second electrode in a final permanent pattern.
It should be noted that the yellow light process and the 3D printing are matched to complete the preparation of the first electrode and the second electrode in the visible touch area and the preparation of the metal lead in the peripheral circuit area. That is, since the positions of the first electrode and the second electrode may affect the placement position of the alignment target, the preparation of the metal lead in the 3D printing may be affected.
In an embodiment of the present invention, before the 3D printer prints the pattern, the preparation method further includes: loading printing raw materials in the 3D printer; wherein the printing material includes copper powder or silver powder of 10nm to 100 nm.
It should be understood that the 3D printer prints the metal wire through the printing raw material loaded therein, and the printing raw material includes copper powder or silver powder of 10nm to 100 nm.
It should be noted that the combination of the features in the present application is not limited to the combination described in the claims or the combination described in the embodiments, and all the features described in the present application may be freely combined or combined in any manner unless contradictory to each other.
It should be noted that the above-mentioned embodiments are only specific embodiments of the present invention, and obviously, the present invention is not limited to the above-mentioned embodiments, and many similar variations exist. All modifications which would occur to one skilled in the art and which are, therefore, directly derivable or suggested by the disclosure of the present invention are intended to be within the scope of the present invention.
It should be understood that the terms first, second, etc. used in the embodiments of the present invention are only used for describing the technical solutions of the embodiments of the present invention more clearly, and cannot be used to limit the protection scope of the present invention.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalents and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A touch panel, comprising:
the touch screen comprises a substrate, a touch screen and a touch screen, wherein the substrate comprises a visible touch area and a peripheral circuit area;
the touch screen comprises a plurality of first electrodes and a plurality of second electrodes, wherein the plurality of first electrodes are arranged in a visible touch area of a substrate and extend along a first direction, the plurality of second electrodes extend along a second direction, and the plurality of first electrodes and the plurality of second electrodes are formed by metal grids; and
a plurality of metal leads disposed in a peripheral circuit region of the substrate, the plurality of first electrodes and the plurality of second electrodes being electrically connected to the plurality of metal leads, respectively; the metal lead is formed by printing nanoscale metal powder through a 3D printing technology.
2. The touch panel according to claim 1, wherein the width of the metal lead is not more than 15 μm or not more than 10 μm.
3. The touch panel according to claim 1, wherein the metal lead is printed with 10nm to 100nm metal powder.
4. The touch panel of claim 3, wherein the metal powder comprises copper or silver.
5. The touch panel of claim 1, wherein the substrate comprises a first substrate, the first electrodes are disposed on a first surface of the first substrate, and the second electrodes are disposed on a second surface of the first substrate opposite the first surface.
6. The touch panel of claim 1, wherein the substrate comprises a first substrate and a second substrate, the first electrodes are disposed on the first substrate, and the second electrodes are disposed on the second substrate.
7. The touch panel of claim 1, wherein the substrate comprises a first substrate, and the first electrodes and the second electrodes are stacked on any surface of the first substrate by a bridging manner.
8. The touch panel according to any one of claims 1 to 7, further comprising a cover sheet attached to the substrate; wherein any one of the substrate and the cover plate is made of a hard material or a polymer material.
9. Touch panel according to claim 8, wherein the hard material is selected from glass; the high polymer material is selected from polyimide, polyethylene terephthalate, polycarbonate or polyurethane.
10. A display device, comprising:
the touch panel according to any one of claims 1 to 9; and
and the touch control chip is electrically connected with the touch control panel.
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| CN111240520A (en) * | 2020-01-19 | 2020-06-05 | 无锡变格新材料科技有限公司 | Touch panel and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111240520A (en) * | 2020-01-19 | 2020-06-05 | 无锡变格新材料科技有限公司 | Touch panel and preparation method thereof |
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