CN106211796B - Touch screen mould group and preparation method thereof - Google Patents

Abstract

The invention relates to a touch screen module, which includes a transparent touch screen and a second component. The touch screen includes a plurality of first patterns formed with marks having a width between 1 and 100 microns, the second element is fixed to the touch screen and includes a plurality of second patterns. Under the technical scheme of the present invention, since the mark used for alignment is invisible to the naked eye, it is convenient to be applied to some special occasions. For example, the mark can be set at the position where the touch screen module is exposed in the final product, and no extra space is needed for setting the mark, which is beneficial to the miniaturization of the touch screen module. The invention also provides a manufacturing method of the 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 technique

In the manufacturing process of the touch screen module, it is usually necessary to connect a layer of transparent components, such as a transparent touch screen, to a layer of opaque or transparent components, such as an opaque FPC. During the manufacturing process, the above-mentioned two-layer components need to be aligned. Existing alignment methods generally include mechanical positioning methods and optical positioning methods. The mechanical positioning method includes opening a through hole at the corresponding position on the two-layer component, and opening the hole positioning method through the corresponding through hole through the column to achieve the positioning purpose; it also includes setting a plurality of columns corresponding to the product frame, and placing the Components are placed in the space enclosed by the multiple columns to align the two-layer components with a frame positioning method. However, the error of the mechanical positioning method is relatively large.

The optical positioning method is to print or paste a visible mark on the transparent element, such as a solid circle, and then set another visible mark on another layer of components, such as a solid circle, and then the operator places the two After the two marks are aligned, the two components are combined. This method can improve the positioning accuracy, however, because the mark is visible, in some special occasions, the mark will bring inconvenience. For example, the mark must be placed in a position where the touch screen module is not visible in the final product, that is, additional space is required for setting the mark.

SUMMARY OF THE INVENTION

Embodiments of the present invention provide a touch screen module and a manufacturing method thereof that can solve the above technical problems.

A touch screen module includes a transparent touch screen and a second component. The touch screen includes a plurality of first patterns formed with marks having a width between 1 and 100 microns, the second element is fixed to the touch screen and includes a plurality of second patterns.

A method for manufacturing a touch screen module, the touch screen module includes a transparent touch screen and a second element, the method includes: forming a plurality of first patterns composed of marks with a width of 1 to 100 microns on the touch screen; The second element forms a plurality of second graphics; and determining the positional relationship between the first and second graphics and fixing the flexible circuit board to the touch screen according to the positional relationship.

Under the technical scheme of the present invention, since the mark used for alignment is invisible to the naked eye, it is convenient to be applied to some special occasions. For example, the mark can be set at the position where the touch screen module is exposed on the final product, and no extra space is needed for setting the mark, which is beneficial to the miniaturization of the touch screen module.

Description of drawings

The following drawings are used to describe various embodiments of the present invention in detail in combination with specific embodiments. It should be understood that the elements shown in the drawings do not represent the actual size and proportion relationship, but are only schematic diagrams shown for clarity of illustration, and should not be construed as limiting the present invention.

FIG. 1 is a flow chart of a manufacturing method of a touch screen module provided by a preferred embodiment of the present invention.

FIG. 2 is an exploded schematic view of the touch screen module produced according to the process of FIG. 1 according to the present invention.

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

FIG. 4 is a schematic diagram of the alignment of the two marks of FIG. 3 .

Detailed ways

In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with multiple implementations and accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present invention, and are not intended to limit the present invention.

Please refer to FIG. 1 to FIG. 3 , which are respectively the flow chart of the manufacturing method of the touch screen module 8 provided by the preferred embodiment of the present invention, the exploded schematic diagram of the touch screen module 8 produced according to the above process, and the partial enlargement of the touch screen module 8 schematic diagram. The touch screen module 8 includes a transparent touch screen 10 and a flexible circuit board 20 . The manufacturing method of the touch screen module 8 provided by the preferred embodiment of the present invention includes the following steps:

Step S10 : forming a plurality of first patterns 18 composed of marks 19 with a width of 1 to 100 microns on the touch screen 10 .

The capacitive touch screen 10 includes a substrate 12 and a conductive layer 14 disposed on the substrate 12 . The substrate 12 can be made of a transparent material, such as glass or polyethylene terephthalate (PET), to facilitate the production of a display screen module with touch function or other application scenarios requiring transparency. When the flexibility of the capacitive touch screen 10 is required, the substrate 12 can be made of PET, which has the advantages of light transmission, good flexibility, and easy manufacture. In this embodiment, the thickness of the substrate 12 made of PET is about 0.015 to 0.2 millimeters (mm), preferably 0.05-0.1 mm, and the substrate within this thickness has better flexibility. Of course, in other cases where transparency is not required, the substrate 12 can also be made of non-transparent materials, such as metal.

The conductive layer 14 can be a transparent conductive thin film comprising a nano-dimensional metal, such as a thin film comprising a single metal, an alloy, a metal compound or any combination thereof, such as a film comprising nano-metal wires, comprising nano-metal particles The thin film, the thin film including the nano-metal grid, of course, can also be a graphene thin film, a carbon nanotube thin film, an organic conductive polymer thin film, an indium tin oxide (Indium Tin Oxide, ITO) thin film or any combination of the above. In this embodiment, the conductive layer 14 is a transparent and conductive nano-silver film, which is a film comprising a polymer matrix with nano-silver, and the nano-silver is uniformly distributed in the film to make the film transparent. and conductive properties. The nano-silver film can be attached to the substrate 12 by coating, screen printing or spraying.

A pattern 16 for sensing touch is formed on the conductive layer 14 by laser. Before the laser, the parameters of the laser can be adjusted. The laser parameters include pulse width, pulse flux, pulse energy, spot size, pulse repetition rate, etc., so that the laser scans the nano-silver film according to the preset path, and makes the irradiated The nano-silver film is peeled off at high temperature. In this way, the area irradiated by the laser forms the pattern 16 for sensing touch.

While forming the pattern 16, the laser is also irradiated at a preset location to form the first figure 18, that is to say, the first figure 18 is formed in the process of forming the pattern 16, therefore, there is no need to It needs to be manufactured through additional steps such as printing after the touch screen is manufactured, which improves the process efficiency. At the same time, it actually reduces the steps of finding the printing position before printing in the background art. In this embodiment, the first pattern 18 is an ellipse formed by the mark 19, and the mark 19 is that after the part of the conductive layer 14 on the mark is irradiated and peeled off by laser, the substrate 12 below is further burnt. However, it can be understood that the marks 19 can also be discrete points. At this time, the first graphic 18 is an ellipse composed of discrete points. It should also be understood that the first graphic can also be in other shapes.

The parameters of the laser are adjusted so that the width of the line-shaped mark 19 is between 1 and 100 microns, that is, greater than 1 micron and less than 100 microns. The lines 19 of this width cannot be seen by the naked eye but can be recognized by the optical magnifying instrument, thereby playing a role Effects that cannot be seen by the naked eye but can be located. Preferably, the lines 19 have a width of between 10 and 40 microns, more preferably 25 to 35 microns, which is easier to manufacture and easier to identify, as tested and tested. Of course, in addition to the above methods, the laser can also be processed to form the pattern 16 for sensing touch and the first pattern 18 without removing them.

Step S20: Form a plurality of second patterns 22 on the flexible circuit board 20, and the positions of each second pattern 22 match with the first pattern 18 and have different shapes. The second figure 22 on the flexible circuit board 20 may be a hollow formed at a position corresponding to the first figure 18, and the hollow is a circle, and the circle preferably inscribes the ellipse of the first figure 18 in the circle.

Step S30 : Align each first pattern 18 with the corresponding second pattern 22 and fix the flexible circuit board 20 to the touch screen 10 . The first graphic 18 on the touch screen 10 can be recognized by the machine vision system, and the recognition of the ellipse of the first graphic 18 by the machine vision system is a technology familiar to those skilled in the art, which will not be repeated in this specification. The touch 10 and the flexible circuit board 20 can be manually aligned, and the two are first superimposed and roughly aligned. Since the positions of the first and second patterns match each other, the first and second patterns are roughly aligned at this time. Then, after the first figure 18 is recognized by the machine vision system, the ellipse of the first figure 18 is inscribed in the circle of the second figure 22 , and the positions of the two are aligned, as shown in FIG. 4 . At this time, the touch screen 10 and the flexible circuit board 20 are fixed by hot pressing. The aforementioned 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 a transparent touch screen 10 and a flexible circuit board 20, but it can be understood that the application of the invisible mark of the present invention is not limited to the transparent touch screen 10. The connection with the flexible circuit board 20 may also be the connection between the touch screen 10 and other components, for example, it may also be the alignment connection between the touch screen 10 and a transparent protective layer or transparent glass. At this time, the transparent protective layer or glass can be provided with a mark made of a mark with a line width of 1 to 100 microns. The mark satisfies the characteristics of the shape and position of the second figure in the above-mentioned embodiment. The method can also achieve accurate alignment. In addition, the shapes of the two marks are not limited to the above methods, for example, the first graphic 18 may also be a circle, or both may be in other shapes.

In the above embodiments, the positions of the first and second patterns are matched with each other, so that the alignment can be realized manually with the aid of instruments. However, it can be understood that the positions of the first and second graphics may not match each other in the case of using automatic equipment. In this case, the system can determine the first coordinates of the touch screen after recognizing the first figure through the machine vision system; then determine the second coordinates of the second component after recognizing the second figure; then the system can calculate two After the difference between the coordinate difference and the predetermined difference, the touch screen or the second component is adjusted by the automation equipment to align the two, and then fix the two to each other.

According to the above description, the manufacturing method of the touch screen module provided by the present invention includes: forming a plurality of first patterns composed of marks with a width of 1 to 100 microns on the touch screen; forming a plurality of second patterns on the second element; and Determine the positional relationship between the first graphics and the second graphics and fix the flexible circuit board to the touch screen according to the positional relationship. At the same time, it should be understood that the order of forming the first graphic and the second graphic in the present invention does not affect the realization of the content of the present invention. Therefore, in the description of the above steps, it cannot be considered that it needs to be in the front because the first graphic is formed. first step.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. within range.

Claims (16)

1. a kind of touch screen mould group, comprising:

Transparent touch screen, the conductive layer including substrate and setting on the substrate, the conductive layer pass through laser It is formed for sensing the pattern touched；

The substrate is provided with including marking the first figure constituted by multiple；

After the part for being located at the corresponding conductive layer of the label is is irradiated removing by the label, further make Substrate below the conductive layer is occurred discoloration and formed by calcination, and the width of the label is between 1 to 100 micron；

Second element comprising multiple second graphs；

Second element is fixed to institute by the positional relationship of each first figure of determination and second graph and according to the positional relationship State touch screen.

2. touch screen mould group as described in claim 1, which is characterized in that the conductive layer includes the metal with nanometer dimension One of film, carbon nano-tube film, graphene film, organic conductive macromolecule film, ito thin film or any combination thereof.

3. touch screen mould group as described in claim 1, which is characterized in that the conductive layer includes silver nanowire film.

4. touch screen mould group as described in any one of claims 1 to 3, which is characterized in that each second graph and corresponding first Graphics shape is different and position is mutually matched.

5. touch screen mould group as described in any one of claims 1 to 3, which is characterized in that each second graph and each first figure Position be not mutually matched.

6. touch screen mould group as described in any one of claims 1 to 3, which is characterized in that the width is between 10 to 40 microns.

7. touch screen mould group as described in any one of claims 1 to 3, which is characterized in that the width is between 25 to 35 microns.

8. touch screen mould group as described in any one of claims 1 to 3, which is characterized in that the thickness of the substrate 0.015 to Between 0.2 millimeter.

9. a kind of production method of touch screen mould group, which includes transparent touch screen and second element, this method Include:

It is formed by laser for sensing the pattern touched in the conductive layer of the touch screen；

Through laser after the conductive layer predeterminated position is irradiated and removes conductive layer, further irradiation makes the conduction Substrate below layer is occurred to change colour and label of the formation width between 1 to 100 micron by calcination；

The first figure that multiple labels by width between 1 to 100 micron are constituted；

Multiple second graphs are formed in the second element；And

It determines the positional relationship of each first figure and second graph and the second element is fixed to by the touching according to the positional relationship Touch screen.

10. production method as claimed in claim 9, which is characterized in that the conductive layer includes the metal with nanometer dimension One of film, carbon nano-tube film, graphene film, organic conductive macromolecule film, ito thin film or any combination thereof.

11. production method as claimed in claim 9, which is characterized in that the conductive layer includes silver nanowire film.

12. such as the described in any item production methods of claim 9 to 11, which is characterized in that each second graph and corresponding first Graphics shape is different and position is mutually matched.

13. such as the described in any item production methods of claim 9 to 11, which is characterized in that each second graph and each first figure Position be not mutually matched.

14. such as the described in any item production methods of claim 9 to 11, which is characterized in that the width is between 10 to 40 microns.

15. such as the described in any item production methods of claim 9 to 11, which is characterized in that the width is between 25 to 35 microns.

16. such as the described in any item production methods of claim 9 to 11, which is characterized in that the thickness of the substrate 0.015 to Between 0.2 millimeter.