CN108073330B - Touch device and manufacturing method thereof - Google Patents
Touch device and manufacturing method thereof Download PDFInfo
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- CN108073330B CN108073330B CN201810133300.5A CN201810133300A CN108073330B CN 108073330 B CN108073330 B CN 108073330B CN 201810133300 A CN201810133300 A CN 201810133300A CN 108073330 B CN108073330 B CN 108073330B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
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Abstract
The invention relates to a touch device and a manufacturing method thereof. The manufacturing method of the touch device comprises the following steps: providing a touch control conductive film; arranging a binder on the surface of the touch conductive film, wherein the binder covers a touch area of the touch device and extends to a frame area of the touch device, the binder comprises an arc corner, two ends of the arc corner are respectively connected with two adjacent side lines of the binder, and an intersection point of extension lines of the two adjacent side lines of the binder is positioned on the inner side of the arc corner; providing a protective cover plate, and carrying out hot pressing on the surface of the touch conductive film with the binder to obtain an intermediate product; and curing to cure the adhesive into the adhesive layer for connecting the touch conductive film and the protective cover plate. In the manufacturing method of the touch device, before hot pressing, the corners of the adhesive are expanded outwards to increase the glue amount at the corners of the touch device, so that no glue overflow and no glue shortage can be caused at the corners of the touch device in the hot pressing process.
Description
Technical Field
The present invention relates to the field of touch technologies, and in particular, to a touch device and a manufacturing method thereof.
Background
The touch device generally includes a touch conductive film, a protective cover, and a bonding layer connecting the touch conductive film and the protective cover. In the process of manufacturing the touch device, firstly, the adhesive is arranged between the touch conductive film and the protective cover plate, and then the whole body formed by the touch conductive film, the adhesive and the protective cover plate is pressed by adopting a hot pressing process. In actual production, when the side line of the touch device is not starved and is not overflowed, the corner of the touch device is frequently starved.
Disclosure of Invention
Accordingly, there is a need for a touch device and a method for manufacturing the same that can effectively prevent corner from being starved of glue.
A manufacturing method of a touch device comprises the following steps:
providing a touch control conductive film;
arranging an adhesive on the surface of the touch conductive film, wherein the adhesive covers a touch area of the touch device and extends to a frame area of the touch device, the adhesive comprises an arc corner, two ends of the arc corner are respectively connected with two adjacent edge lines of the adhesive, and an intersection point of extension lines of the two adjacent edge lines of the adhesive is positioned on the inner side of the arc corner;
providing a protective cover plate, and thermally pressing the protective cover plate on the surface of the touch conductive film with the binder to obtain an intermediate product; and
and curing the intermediate product to cure the adhesive into an adhesive layer connecting the touch conductive film and the protective cover plate.
In the manufacturing method of the touch device, the intersection point of the extension lines of the two adjacent edge lines of the adhesive is located on the inner side of the arc corner (the side far away from the touch conductive film), that is, the arc corner is an outward convex arc corner, that is, before hot pressing, the corner of the adhesive is expanded outwards, so that the glue amount at the corner of the touch device is increased, and further, in the hot pressing process, when the edge lines of the touch device are controlled not to overflow and not to lack glue, the corner of the touch device can be prevented from overflowing and not to lack glue.
In one embodiment, an intersection point of extension lines of two adjacent edge lines of the adhesive is a first intersection point, an intersection point of two adjacent edge lines of the touch conductive film is a second intersection point, and the first intersection point, a vertex of the arc corner and the second intersection point are located on the same straight line at the same corner of the touch device.
In one embodiment, the touch conductive film includes a circuit layer on a surface, the circuit layer includes a plurality of touch electrodes located in a touch area of the touch device and a plurality of leads located in a frame area of the touch device, the number of the leads is the same as the number of the touch electrodes and the leads are connected in a one-to-one correspondence manner;
the protective cover plate comprises a touch surface and a connecting surface which are opposite, and the connecting surface is provided with a white shading layer corresponding to a frame area of the touch device;
the lead comprises a line segment, a connecting segment and a binding segment, wherein the line segment is parallel to the side line of the touch conductive film, two ends of the connecting segment are respectively connected with the touch electrode and the line segment, one end of the binding segment is connected with the line segment, and the other end of the binding segment is used for being connected with the flexible circuit board;
constructing a first rectangular wire frame by using the outermost wire section of the touch conductive film, wherein the distances between four side lines of the first rectangular wire frame and the corresponding side lines of the touch conductive film are equal, constructing a second rectangular wire frame by using the innermost wire section of the touch conductive film, and the distances between four side lines of the second rectangular wire frame and the corresponding side lines of the touch conductive film are equal;
the border of the adhesive is located between the first rectangular wire frame and the second rectangular wire frame.
In one embodiment, the vertex of the arc corner coincides with the intersection of two adjacent edges of the first rectangular wire frame.
In one embodiment, an intersection point of extension lines of two adjacent sidelines of the adhesive is a first intersection point, distances between the first intersection point and end points of the two sidelines corresponding to the first intersection point are both functional distances, and the two end points of the arc corner are determined by adjusting the functional distances;
in the production process, if the corner of the obtained touch device is in glue shortage, the functional distance is reduced when the next touch device is manufactured, so that the end point of the arc-shaped corner of the adhesive is changed, and the phenomenon of glue shortage of the corner is avoided; and if the corner of the obtained touch device overflows glue, increasing the functional distance when the next touch device is manufactured, so that the end point of the arc corner of the binder is changed, and the corner overflow glue phenomenon is avoided.
In one embodiment, the functional distance is 2mm, and when the corner glue shortage or corner glue overflow phenomenon occurs, the functional distance is controlled to be reduced or increased by 0.5mm each time until the corner glue shortage and corner glue overflow do not occur.
In one embodiment, the adhesive is located on the surface of the touch conductive film with the circuit layer.
A touch device, comprising:
a protective cover plate;
a touch conductive film; and
the bonding layer is connected with the protective cover plate and the touch conductive film;
the touch control conductive film comprises a circuit layer positioned on the surface, the circuit layer comprises a plurality of touch control electrodes positioned in a touch control area of the touch control device and lead wires positioned in a frame area of the touch control device, the number of the touch control electrodes is the same as that of the lead wires, the lead wires are connected in a one-to-one correspondence manner, the protective cover plate comprises a touch surface and a connecting surface which are opposite, and the connecting surface is provided with a light shielding layer corresponding to the frame area of the touch control device;
the lead comprises a line segment, a connecting segment and a binding segment, wherein the line segment is parallel to the side line of the touch conductive film, two ends of the connecting segment are respectively connected with the touch electrode and the line segment, one end of the binding segment is connected with the line segment, and the other end of the binding segment is used for being connected with the flexible circuit board;
constructing a first rectangular wire frame by using the outermost routing section of the touch conductive film, wherein the distances between four side lines of the first rectangular wire frame and the corresponding side lines of the touch conductive film are equal;
the outer edge of the bonding layer is located between the first rectangular wire frame and the outer edge of the touch conductive film, the corners of the bonding layer are arc corners, and the vertexes of the arc corners are located in the intersection points of the two sidelines of the arc corners.
In one embodiment, the light-shielding layer is a white light-shielding layer.
In one embodiment, the frame region is a closed ring structure, and the frame region surrounds the touch region.
Drawings
FIG. 1 is a cross-sectional view of a conventional touch device;
fig. 2 is a schematic structural view of a conventional touch conductive film and an adhesive;
fig. 3 is a schematic structural view of a conventional touch conductive film and an adhesive layer;
fig. 4 is a schematic structural diagram of the touch conductive film and the adhesive provided in this embodiment;
fig. 5 is a schematic structural view of the touch conductive film and the adhesive layer provided in this embodiment;
fig. 6 is a schematic structural diagram of the touch conductive film provided in this embodiment.
Detailed Description
The touch device and the manufacturing method thereof will be further described with reference to the drawings and the specific embodiments.
As shown in fig. 1, the touch device 10 includes a touch conductive film 100, a protective cover 300, and an adhesive layer 200 connecting the touch conductive film 100 and the protective cover 300.
Referring to fig. 2, when manufacturing the touch device 10, a binder (semi-solid state) 400 may be first disposed on the touch conductive film 100, and the binder 400 has a certain shape and thickness, and then a hot pressing process is performed to press the protective cover 300 on the surface of the touch conductive film 100 having the binder 400, so as to obtain an intermediate product. Then, the intermediate product is cured, so that the adhesive 400 is cured into the adhesive layer 300 connecting the touch conductive film 100 and the protective cover 200.
In the hot pressing process, the thickness of the adhesive 400 is reduced due to the pressing, and in the embodiment, the thickness of the adhesive 400 is reduced by 20 to 50 μm. Since the volume of the adhesive 400 is not changed, the thickness of the adhesive 400 is reduced, so that the adhesive 400 extends outward, if the distance that the adhesive 400 extends outward is greater than the distance between the outer edge of the adhesive 400 before being hot-pressed and the outer edge of the touch conductive film 100, an adhesive overflow phenomenon occurs, and if the distance that the adhesive 400 extends outward is too small, an adhesive shortage phenomenon occurs.
In actual production, when quality inspection is performed on the produced touch device 10, it is found that the corner of the touch device 10 often has a phenomenon of glue shortage. It is found that, when the adhesive 400 is designed, the side lines 410 of the adhesive 400 are parallel to the side lines 110 of the corresponding touch conductive films 100, and distances D1 between the side lines 410 of the plurality of adhesives 400 and the side lines 110 of the corresponding touch conductive films 100 are all equal. Specifically, in the present embodiment, the adhesive 400 and the touch conductive films 100 are rectangular, and distances D1 between the side lines 110 of the four touch conductive films 100 and the corresponding side lines 410 of the adhesive 400 are all equal, so that the side lines of the touch device 10 can be controlled not to overflow or lack glue. However, when the corner of the adhesive 400 is an intersection of the two edge lines 410, that is, when the corner of the adhesive 400 is a right-angled corner, the distance D2 between the corner of the adhesive 400 and the corner of the touch conductive film 100 is greater than the distance D1 between the edge line 410 of the adhesive 400 and the edge line 110 of the touch conductive film 100, so that when the edge line of the touch device 10 is controlled not to overflow nor starve, the corner of the touch device 10 is starved.
Referring to fig. 3, the adhesive 400 shown in fig. 2 is cured by heat pressing to obtain the adhesive layer 300 shown in fig. 3, the adhesive layer 300 extends outward for a certain distance relative to the adhesive 400, and four corners of the adhesive layer 300 are changed into arc-shaped corners 320, but the vertices of the arc-shaped corners 320 are located in the intersection of the two edge lines 310 of the adhesive layer 300, that is, there is a large area between the corners of the adhesive layer 300 and the corners of the touch conductive film 100 without glue, that is, there is a corner glue shortage of the touch device 10.
In order to solve the problem of corner starvation, in the present embodiment, the structure of the adhesive 400 is modified, and the corners of the adhesive 400 are set as arc-shaped corners, so as to obtain the modified adhesive 500.
As shown in fig. 4 and 5, in the present embodiment, the adhesive 500 includes four side lines 510 and four arc-shaped corners 520, the four side lines 510 respectively correspond to the four side lines of the rectangle, and two ends of each arc-shaped corner 520 are respectively connected to two adjacent side lines 510. The intersection point 512 of the extension lines of the two adjacent edge lines 510 of the adhesive 500 is located at the inner side of the arc corner 520 (the side away from the touch conductive film 100), that is, the arc corner 520 is an outward-protruding arc corner, that is, before the thermal compression bonding, that is, the corner 520 of the adhesive 500 is extended outward, so as to increase the glue amount at the corner of the touch device 10, and further, in the thermal compression process, when the edge lines of the touch device 10 are controlled not to overflow and not to be starved, the corner of the touch device 10 can be further enabled not to overflow and not to be starved.
Further, in the present embodiment, an intersection point of the extension lines of the two adjacent edge lines 510 of the adhesive 500 is a first intersection point 512, an intersection point of the two adjacent edge lines 110 of the touch conductive film 100 is a second intersection point 112, and at the same corner of the touch device 10, the first intersection point 512, the vertex 522 of the arc corner 520, and the second intersection point 112 are located on the same straight line. Therefore, corner glue overflow and glue shortage can be effectively avoided.
As shown in fig. 6, in the present embodiment, the touch device 10 includes a touch area 12 and a frame area 14. Specifically, in the present embodiment, the frame region 14 surrounds the touch region 12 and is a closed ring structure. The adhesive 500 covers the touch area 12 of the touch device 10, and the adhesive 500 extends to the frame area 14 of the touch device 10.
The touch conductive film 100 includes a substrate 120 and a circuit layer 130 disposed on a surface of the substrate 120. The adhesive 500 covers the surface of the touch conductive film 100 having the wiring layer 130. It is understood that, in other embodiments, when the touch conductive film 100 has only one circuit layer 130 (the touch conductive film 100 may include two circuit layers respectively located on two opposite surfaces thereof), the adhesive 500 may also cover the surface of the touch conductive film 100 without the circuit layer 130.
The circuit layer 130 includes a touch electrode 132 located in the touch area 12 and a lead 134 located in the frame area 14. The number of the touch electrodes 132 is plural, and the number of the leads 134 is the same as the number of the touch electrodes 132, and the leads are connected in a one-to-one correspondence.
Referring to fig. 1, the protective cover 300 includes a touch surface 310 and a connecting surface 320, and the connecting surface 320 is provided with a light shielding layer (not shown) corresponding to the frame region 14 to shield the leads 134.
The light shielding layer may exhibit various colors, for example, when the light shielding layer is a white light shielding layer, the frame region 14 of the front panel of the touch device 10 exhibits white, and when the light shielding layer is a black light shielding layer, the frame region 14 of the front panel of the touch device 10 exhibits black.
In order to achieve the same light-shielding effect, the thickness of the white light-shielding layer needs to be larger than that of the black light-shielding layer, and the difference in thickness between the white light-shielding layer and the black light-shielding layer is approximately 40 μm. The light shielding layer occupies the space of the adhesive 500 extending outward in the hot pressing process, and when the thickness of the light shielding layer is larger under the same conditions, the size of the adhesive 500 needs to be reduced appropriately when designing the adhesive 500. That is, the size of the adhesive 500 corresponding to the white light-shielding layer needs to be smaller than the size of the adhesive 500 corresponding to the black light-shielding layer.
Specifically, in this embodiment, the lead 134 includes a trace segment 1342, a connection segment 1344 and a binding segment 1346, the trace segment 1342 is parallel to the side line 110 of the touch conductive film 100, two ends of the connection segment 1344 are respectively connected to the touch electrode 132 and the trace segment 1342, one end of the binding segment 1346 is connected to the trace segment 1342, and the other end is used for being connected to the flexible circuit board.
Referring to fig. 4, the outermost trace segment 1342 of the touch conductive film 100 is used to construct a first rectangular wire frame 600, the distances between the four side lines of the first rectangular wire frame 600 and the side lines 110 of the corresponding touch conductive film 100 are all equal, the innermost trace segment 1342 of the touch conductive film 100 is used to construct a second rectangular wire frame 700, and the distances between the four side lines of the second rectangular wire frame 700 and the side lines 110 of the corresponding touch conductive film 100 are all equal.
Specifically, in the present embodiment, the light-shielding layer is a white light-shielding layer, and the boundary 510 of the adhesive 500 is located between the first rectangular wire frame 600 and the second rectangular wire frame 700. Therefore, the phenomena of glue overflow and glue shortage at the side line of the touch device of the white panel can be avoided. In other embodiments, when the light-shielding layer is a black light-shielding layer, the boundary 510 of the adhesive 500 may be overlapped with the boundary of the first rectangular wire frame 600, or may be located between the first rectangular wire frame 600 and the boundary of the touch device, and the boundary 510 of the adhesive 500 is close to the first rectangular wire frame 600.
Further, in the present embodiment, the vertex 522 of the arc corner 520 coincides with the intersection of two adjacent edges of the first rectangular wire frame 600. Therefore, corner glue overflow and glue shortage can be effectively avoided.
Further, in the present embodiment, the distances between the first intersection point 512 and the end points of the two edge lines 510 corresponding to the first intersection point 512 are both the functional distance D3, and the two end points of the arc corner 520, that is, the starting point of the arc, are determined by adjusting the functional distance D3. In the production process, if the corner of the obtained touch device is in the absence of glue, the functional distance D3 is reduced when the next touch device is manufactured, so that the end point of the arc-shaped corner 520 of the adhesive 500 is changed, and the corner in the absence of glue is avoided; if the corner of the touch device is overflowed, the functional distance D3 is increased when the next touch device is manufactured, so that the end point of the arc corner 520 of the adhesive 500 is changed, and the corner overflow phenomenon is avoided.
Specifically, in the present embodiment, the functional distance D3 is 2mm, that is, the distances between the first intersection point 512 and the end points of the two corresponding edge lines 510 are 2mm respectively. When the functional distance is 2mm, and the corner glue shortage or corner glue overflow phenomenon occurs, the functional distance D3 is controlled to be reduced or increased by 0.5mm each time until the corner does not have glue shortage or glue overflow.
Referring to fig. 5, after the adhesive 500 shown in fig. 4 is cured by heat pressing, the adhesive layer 800 shown in fig. 5 is obtained, the adhesive layer 800 extends outward for a certain distance relative to the adhesive 500, a side line 810 of the adhesive layer 800 is located between the first rectangular wire frame 600 and the side line 110 of the touch conductive film 100, a corner of the adhesive layer 800 is an arc corner 820, a vertex 822 of the arc corner 820 is located outside an intersection point of the two side lines 810 of the arc corner 820, and the vertex 822 of the arc corner 820 is located between the first rectangular wire frame 600 and the touch conductive film 100.
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 more specific and detailed, but not construed as limiting the scope of the invention. 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 manufacturing method of a touch device is characterized by comprising the following steps:
providing a touch control conductive film;
arranging an adhesive on the surface of the touch conductive film, wherein the adhesive covers a touch area of the touch device and extends to a frame area of the touch device, the adhesive comprises an arc corner, two ends of the arc corner are respectively connected with two adjacent edge lines of the adhesive, and an intersection point of extension lines of the two adjacent edge lines of the adhesive is positioned on the inner side of the arc corner;
providing a protective cover plate, and thermally pressing the protective cover plate on the surface of the touch conductive film with the binder to obtain an intermediate product; and
and curing the intermediate product to cure the adhesive into an adhesive layer connecting the touch conductive film and the protective cover plate.
2. The method of manufacturing a touch device according to claim 1, wherein an intersection point of extension lines of two adjacent edge lines of the adhesive is a first intersection point, an intersection point of two adjacent edge lines of the touch conductive film is a second intersection point, and the first intersection point, a vertex of the arc corner, and the second intersection point are located on a same straight line at a same corner of the touch device.
3. The manufacturing method of the touch device according to claim 1, wherein the touch conductive film includes a wiring layer on a surface, the wiring layer includes a plurality of touch electrodes located in a touch area of the touch device and lead lines located in a frame area of the touch device, the number of the touch electrodes is the same as that of the touch electrodes, and the touch electrodes are connected in a one-to-one correspondence;
the protective cover plate comprises a touch surface and a connecting surface which are opposite, and the connecting surface is provided with a white shading layer corresponding to a frame area of the touch device;
the lead comprises a line segment, a connecting segment and a binding segment, wherein the line segment is parallel to the side line of the touch conductive film, two ends of the connecting segment are respectively connected with the touch electrode and the line segment, one end of the binding segment is connected with the line segment, and the other end of the binding segment is used for being connected with the flexible circuit board;
constructing a first rectangular wire frame by using the outermost wire section of the touch conductive film, wherein the distances between four side lines of the first rectangular wire frame and the corresponding side lines of the touch conductive film are equal, constructing a second rectangular wire frame by using the innermost wire section of the touch conductive film, and the distances between four side lines of the second rectangular wire frame and the corresponding side lines of the touch conductive film are equal;
the border of the adhesive is located between the first rectangular wire frame and the second rectangular wire frame.
4. The method for manufacturing a touch device according to claim 3, wherein the vertex of the arc corner coincides with an intersection of two adjacent edges of the first rectangular wire frame.
5. The manufacturing method of the touch device according to claim 4, wherein an intersection point of extension lines of two adjacent edge lines of the adhesive is a first intersection point, distances between the first intersection point and end points of the two edge lines corresponding to the first intersection point are both functional distances, and the two end points of the arc-shaped corner are determined by adjusting the functional distances;
in the production process, if the corner of the obtained touch device is in glue shortage, the functional distance is reduced when the next touch device is manufactured, so that the end point of the arc-shaped corner of the adhesive is changed, and the phenomenon of glue shortage of the corner is avoided; and if the corner of the obtained touch device overflows glue, increasing the functional distance when the next touch device is manufactured, so that the end point of the arc corner of the binder is changed, and the corner overflow glue phenomenon is avoided.
6. The method for manufacturing a touch device according to claim 5, wherein the functional distance is 2mm, and when corner glue shortage or corner glue overflow occurs, the functional distance is controlled to be reduced or increased by 0.5mm each time until no glue shortage or glue overflow occurs at the corner.
7. The method for manufacturing a touch device according to claim 3, wherein the adhesive is located on the surface of the touch conductive film having the circuit layer.
8. A touch device, comprising:
a protective cover plate;
a touch conductive film; and
the bonding layer is connected with the protective cover plate and the touch conductive film;
the touch control conductive film comprises a circuit layer positioned on the surface, the circuit layer comprises a plurality of touch control electrodes positioned in a touch control area of the touch control device and lead wires positioned in a frame area of the touch control device, the number of the touch control electrodes is the same as that of the lead wires, the lead wires are connected in a one-to-one correspondence manner, the protective cover plate comprises a touch surface and a connecting surface which are opposite, and the connecting surface is provided with a light shielding layer corresponding to the frame area of the touch control device;
the lead comprises a line segment, a connecting segment and a binding segment, wherein the line segment is parallel to the side line of the touch conductive film, two ends of the connecting segment are respectively connected with the touch electrode and the line segment, one end of the binding segment is connected with the line segment, and the other end of the binding segment is used for being connected with the flexible circuit board;
constructing a first rectangular wire frame by using the outermost routing section of the touch conductive film, wherein the distances between four side lines of the first rectangular wire frame and the corresponding side lines of the touch conductive film are equal;
the outer edge of the bonding layer is located between the first rectangular wire frame and the outer edge of the touch conductive film, the corners of the bonding layer are arc corners, and the vertexes of the arc corners are located outside the intersection points of the two sidelines of the arc corners.
9. The touch device of claim 8, wherein the light-shielding layer is a white light-shielding layer.
10. The touch device of claim 8, wherein the frame area is a closed ring structure, and the frame area surrounds the touch area.
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| KR20130016607A (en) * | 2011-08-08 | 2013-02-18 | 삼성전기주식회사 | Inertial sensor and method of manufacturing the same |
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| CN108073330A (en) | 2018-05-25 |
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