CN106211796A

CN106211796A - Touch screen module and preparation method thereof

Info

Publication number: CN106211796A
Application number: CN201580001428.0A
Authority: CN
Inventors: 刘自鸿; 魏鹏; 余晓军; 邹翔; 周瑜; 陈鑫
Original assignee: Shenzhen Royole Technologies Co Ltd
Current assignee: Shenzhen Royole Technologies Co Ltd
Priority date: 2015-03-27
Filing date: 2015-03-27
Publication date: 2016-12-07
Anticipated expiration: 2035-03-27
Also published as: KR20170132272A; CN106211796B; JP2018509724A; WO2016154830A1; KR102040074B1; JP6629954B2

Abstract

The present invention relates to a kind of touch screen module, including transparent touch screen and the second element.This touch screen includes the first figure that multiple width labelling between 1 to 100 micron is constituted, and this second element is fixed to this touch screen and it includes multiple second graph.Under technical scheme, owing to the labelling naked eyes for para-position are invisible, it is simple to application is to some some special occasions.Such as, labelling may be provided at touch screen module and is revealed in the position of final products, it is not necessary to additional space arranges labelling, beneficially the miniaturization of touch screen module.The present invention also provides for the manufacture method of a kind of touch screen module.

Description

Touch screen module and manufacturing method thereof

Technical Field

The invention relates to a touch screen, in particular to a touch screen module and a manufacturing method thereof.

Background

The manufacture of touch screen modules typically requires the attachment of a transparent element, such as a transparent touch screen, to an opaque or transparent element, such as an opaque FPC. The two layers of devices need to be aligned during the manufacturing process. The existing alignment methods generally include mechanical alignment and optical alignment. The mechanical positioning method comprises a hole positioning method that through holes are arranged at corresponding positions on the two layers of elements and the vertical columns penetrate through the corresponding through holes to achieve the positioning purpose; the frame positioning method comprises the steps of arranging a plurality of columns corresponding to the frames of the product, and placing two side elements in a space defined by the columns so as to align the two layers of elements. However, the error of the mechanical positioning method is large.

The optical positioning method is to print or stick a visible mark, such as a solid circle, on the transparent element, and then to set another visible mark, such as a solid circle, on the element of another layer, and then to align the two marks and then to combine the two elements. This method can improve the positioning accuracy, however, the marking can be inconvenient in some special situations because the marking is visible. For example, the marks must be located at positions where the touch screen module is not visible in the final product, i.e., additional space is required to place the marks.

Disclosure of Invention

Embodiments of the present invention provide a touch screen module and a method for manufacturing the same, which can solve the above technical problems.

A touch screen module comprises a transparent touch screen and a second element. The touch screen includes a plurality of first graphics formed with indicia having a width between 1 and 100 microns, the second element being secured to the touch screen and including a plurality of second graphics.

A manufacturing method of a touch screen module comprises a transparent touch screen and a second element, and the method comprises the following steps: forming a plurality of first patterns of marks with the width of 1-100 microns on the touch screen; forming a plurality of second patterns on the second element; and determining the position relation of each first graph and each second graph and fixing the flexible circuit board to the touch screen according to the position relation.

Under the technical scheme of the invention, the mark for alignment is invisible to naked eyes, so that the method is convenient to be applied to some special occasions. For example, the mark can be arranged at a position where the touch screen module is exposed from a final product, and an extra space is not needed for arranging the mark, which is beneficial to miniaturization of the touch screen module.

Drawings

The following drawings are included to provide a detailed description of various embodiments of the invention. It should be understood that the elements illustrated in the drawings are not necessarily to scale, and that they are merely schematic representations made for clarity of illustration and are not to be construed as limitations of the invention.

Fig. 1 is a flowchart illustrating a method for manufacturing a touch screen module according to a preferred embodiment of the invention.

FIG. 2 is an exploded view of a touch screen module manufactured according to the process of FIG. 1.

Fig. 3 is a partially enlarged schematic view of a touch screen and a flexible circuit board of the touch screen module of fig. 2.

Fig. 4 is a schematic diagram of fig. 3 after alignment of two marks.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to a plurality of embodiments and accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.

Please refer to fig. 1 to fig. 3, which are a flowchart of a method for manufacturing a touch screen module 8 according to a preferred embodiment of the present invention, an exploded schematic view of the touch screen module 8 manufactured according to the above flowchart, and a partially enlarged schematic view of the touch screen module 8. The touch screen module 8 includes a transparent touch screen 10 and a flexible circuit board 20. The method for manufacturing the touch screen module 8 provided by the preferred embodiment of the invention comprises the following steps:

step S10: a plurality of first patterns 18 of marks 19 having a width of 1 to 100 micrometers are formed on the touch screen 10.

Capacitive touch screen 10 includes a substrate 12 and a conductive layer 14 disposed on substrate 12. The substrate 12 may be made of a transparent material, such as glass or Polyethylene Terephthalate (PET), so as to facilitate the manufacturing of a display screen module with a touch function or other application scenes requiring transparent characteristics. When the capacitive touch screen 10 is required to have flexibility, the base material 12 can be made of optional PET, and the PET has the advantages of good light transmission and flexibility, easiness in manufacturing and the like. In this embodiment, the substrate 12 made of PET has a thickness of about 0.015 to 0.2 millimeters (mm), preferably 0.05 to 0.1mm, and has good flexibility within this thickness. Of course, the substrate 12 may be made of a non-transparent material, such as a metal, in other cases where transparent properties are not required.

The conductive layer 14 may be a transparent conductive film containing a metal with nanometer dimension, such as a film containing a single metal with nanometer dimension, an alloy, a metal compound, or any combination thereof, such as a film containing a metal wire, a film containing metal nanoparticles, a film containing a metal grid, a graphene film, a carbon nanotube film, an organic conductive polymer film, an Indium Tin Oxide (ITO) film, or any combination thereof. In the present embodiment, the conductive layer 14 is a transparent conductive nano silver wire film, which is a film including a polymer matrix with nano silver wires, and the nano silver wires are randomly and uniformly distributed in the film, so that the film has the characteristics of transparency and conductivity. The nano-silver wire film may be applied to the substrate 12 by coating, screen printing or spraying.

The conductive layer 14 has a pattern 16 formed thereon by a laser for sensing a touch by means of a laser. Before laser, parameters of laser can be adjusted, wherein the laser parameters comprise pulse width, pulse flux, pulse energy, spot size, pulse repetition rate and the like, so that the laser scans the nano silver wire film according to a preset path, and the irradiated nano silver wire film is peeled off at a high temperature. Thus, the laser irradiated area forms the pattern 16 for sensing touch.

The laser is irradiated at a predetermined position while the pattern 16 is formed, and the first pattern 18 is formed, that is, the first pattern 18 is formed during the formation of the pattern 16, so that it is not necessary to perform additional printing or the like after the touch screen is manufactured as described in the related art, thereby improving the manufacturing efficiency. Meanwhile, the step of finding the printing position before printing in the background technology is reduced. In the present embodiment, the first pattern 18 is an ellipse formed by the mark 19, and the mark 19 is a line formed by peeling off the portion of the conductive layer 14 on the mark by irradiation with laser light and burning the underlying base material 12 to change color, but it is understood that the mark 19 may be a discrete point, and in this case, the first pattern 18 is an ellipse formed by discrete points, and it is also understood that the first pattern may have another shape.

The laser parameters are adjusted so that the width of the line-shaped mark 19 is between 1 and 100 micrometers, i.e. greater than 1 micrometer and less than 100 micrometers, and the line 19 with the width can not be recognized by an optical magnifying instrument, so that the effect that the line can not be seen by naked eyes but can be positioned is achieved. Preferably, the lines 19 have a width of between 10 and 40 microns, more preferably between 25 and 35 microns, as tested and tested, and are easier to manufacture and easier to identify. Of course, in addition to the above, the laser may be processed to form the pattern 16 for sensing touch and the first pattern 18 in a non-removing manner.

Step S20: a plurality of second patterns 22 are formed on the flexible circuit board 20, and the positions of the second patterns 22 and the first patterns 18 are matched with each other and have different shapes. The second pattern 22 on the flexible circuit board 20 may be a hollow provided at a position corresponding to the first pattern 18, and the hollow may be a circle, and the circle is preferably such that the ellipse of the first pattern 18 is inscribed in the circle.

Step S30: each first pattern 18 and corresponding second pattern 22 are aligned and the flexible circuit board 20 is secured to the touch screen 10. The first pattern 18 on the touch screen 10 can be recognized by a machine vision system, and the machine vision system can recognize the ellipse of the first pattern 18, which is a technology familiar to those skilled in the art, and the description is omitted here. The touch 10 and the flexible circuit board 20 can be manually aligned by first laminating and substantially aligning the first and second patterns, which are substantially aligned because the first and second patterns are positioned to match each other. Then, after the first pattern 18 is recognized by the machine vision system, the ellipse of the first pattern 18 is inscribed in the circle of the second pattern 22, and the positions of the two are aligned, as shown in fig. 4. At this time, the touch panel 10 and the flexible circuit board 20 are fixed by thermal compression. The matching means that when the positions of the touch screen 10 and the flexible circuit board 20 are aligned, the positions of the first and second patterns are also aligned with each other.

In the above embodiment for illustrating the present invention, the touch screen module 8 includes the transparent touch screen 10 and the flexible circuit board 20, however, it is understood that the invisible mark applied in the present invention is not limited to the connection between the transparent touch screen 10 and the flexible circuit board 20, but may also be the connection between the touch screen 10 and other elements, for example, the connection between the touch screen 10 and the transparent protective layer or the alignment of the transparent glass. In this case, the transparent protective layer or the glass may be provided thereon with a mark formed of a mark having a line width of 1 to 100 μm, which satisfies the characteristics such as the shape and position of the second pattern as in the above embodiment, and the accurate alignment may be achieved by the above method. In addition, the shape of the two marks is not limited to the above-mentioned manner, for example, the first pattern 18 may be a circle, or both of them may be other shapes.

In the above embodiment, the positions of the first and second patterns are matched to each other so that alignment can be achieved manually and by means of an instrument. However, it is understood that the positions of the first and second patterns may not match each other when automated equipment is utilized. In this case, after the system can recognize the first graph through the machine vision system, the system determines the first coordinate of the touch screen; then, after a second graph is identified, determining a second coordinate of a second element; and after the difference between the difference value of the two coordinates and the preset difference value is calculated by the system, the touch screen or the second element is adjusted through automatic equipment so as to align the two, and then the two are mutually fixed.

According to the above description, the method for manufacturing a touch screen module provided by the invention comprises the following steps: forming a plurality of first patterns consisting of marks with the width of 1 to 100 micrometers on the touch screen; forming a plurality of second patterns on the second element; and determining the position relation of each first graph and each second graph and fixing the flexible circuit board to the touch screen according to the position relation. Meanwhile, it should be understood that the order of forming the first pattern and the second pattern in the present invention does not affect the implementation of the present invention, and therefore, in the above description of the steps, it cannot be considered that the first pattern is formed as a previous step since it is written in the foregoing.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

A touch screen module, comprising:

a transparent touch screen comprising a plurality of first patterns of indicia having a width between 1 and 100 microns; and

a second element fixed to the touch screen and including a plurality of second graphics.
The touch screen module of claim 1, wherein the touch screen module comprises a substrate and a conductive layer disposed on the substrate, the conductive layer is formed with a pattern for sensing touch, and the substrate is formed with the plurality of first patterns.
The touch screen module of claim 2, wherein the conductive layer comprises one of a metal film with nanometer dimension, a carbon nanotube film, a graphene film, an organic conductive polymer film, an ITO film, or any combination thereof.
The touch screen module of claim 2, wherein the conductive layer comprises a nano-silver wire film.
The touch screen module of claim 2, wherein the first patterns are formed on the substrate by irradiating the conductive layer and the substrate.
The touch screen module of any of claims 1-5, wherein each second graphic is shaped differently and positioned to match a corresponding first graphic.
The touch screen module of any of claims 1-5, wherein the second patterns do not match the first patterns in position.
The touch screen module of any of claims 1-5, wherein the width is between 10 and 40 microns.
The touch screen module of any of claims 1-5, wherein the width is between 25 and 35 microns.
The touch screen module of any of claims 2-5, wherein the substrate has a thickness of between 0.015 and 0.2 mm.
A manufacturing method of a touch screen module comprises a transparent touch screen and a second element, and the method comprises the following steps:

forming a plurality of first patterns of marks with the width of 1-100 microns on the touch screen;

forming a plurality of second patterns on the second element; and

and determining the position relation of each first graph and each second graph and fixing the flexible circuit board to the touch screen according to the position relation.
The method of claim 11, wherein the touch screen module comprises a substrate and a conductive layer disposed on the substrate, and the method further comprises: and forming a pattern for sensing touch on the conductive layer in a laser mode.
The method of claim 12, wherein the step of forming the first pattern comprises: and forming a plurality of first patterns consisting of marks with the width of 1-100 microns on the touch screen in a laser mode of the substrate and the conductive layer.
The method of claim 13, wherein the conductive layer comprises one of a metal film with nanometer dimension, a carbon nanotube film, a graphene film, an organic conductive polymer film, an ITO film, or any combination thereof.
The method of claim 13, wherein the conductive layer comprises a nano-silver wire film.
A touch screen module according to any of claims 11 to 15, wherein each second pattern is shaped differently and is positioned to match the corresponding first pattern.
The touch screen module of any of claims 11-15, wherein the second patterns do not match the first patterns in position.
The touch screen module of any of claims 11-15, wherein the width is between 10 and 40 microns.
The touch screen module of any of claims 11-15, wherein the width is between 25 and 35 microns.
The touch screen module of any of claims 12-15, wherein the substrate has a thickness of between 0.015 and 0.2 mm.