CN101441947A - Light guide film key module and manufacturing method thereof - Google Patents

Abstract

The invention relates to a light guide film key module and a manufacturing method thereof, wherein at least one key symbol layer is printed or etched on a touch control component; adhering an elastic layer below the touch control assembly; printing a dot on one side of a transparent film and a reflecting bottom layer penetrating through the circuit substrate and attaching the dot and the reflecting bottom layer below the elastic layer; finally, the plural light-emitting components and the plural conductive contacts are disposed on a circuit substrate and juxtaposed on the bottom surface of the transparent film. The screen dots are printed on one side of the transparent film and the reflecting bottom layer is arranged on the circuit substrate in a penetrating way, so that the manufactured key is changed into light, thin and short, the screen dots are matched with the reflecting bottom layer, a light source can penetrate through the transparent film to uniformly disperse and emit light, the viewed distance is increased, the manufacturing and the construction are easy, the production efficiency can be improved, the manufacturing cost can be saved, and various different sizes and shapes can be customized according to the personal items required by customers.

Description

Light guide film key module and manufacturing method thereof

technical field

The present invention relates to a light guide film button module and its manufacturing method, in particular to a transparent film provided between a touch component and a circuit substrate, with dots printed on one side of the transparent film and a reflector on the circuit substrate. The bottom layer, in addition to making the button become thinner and shorter, and the dots and reflective layer can make the light source penetrate the transparent film and evenly disperse the light, so as to increase the viewing distance. It is easy to manufacture and construct, and can improve Production efficiency and manufacturing cost savings, and various sizes and shapes can also be customized according to customer requirements.

Background technique

At present, the development trend of many electronic products tends to be more and more light and portable, such as mobile phones, palmtop computers, etc. These products are usually used in dark places at night, and it is difficult to see the key symbols clearly, resulting in extremely difficult to use. inconvenient.

Therefore, there is a light source under the keys to display the key symbols, but the backlight module is mainly assembled from transparent glass, light-emitting components, and reflectors. It is also extremely inconvenient to use.

Contents of the invention

The invention discloses a light guide film key module and a manufacturing method thereof to overcome the above defects.

In order to achieve the above object, the technical solution adopted by the present invention is to provide a light guide film key module, which includes:

A touch component, which has a key symbol layer;

An elastic layer is placed under the touch component;

a transparent film placed below the elastic layer, one side of which is printed with dots; and

A circuit substrate is placed under the transparent film, and its surface is provided with a plurality of conductive contacts corresponding to the touch component, a reflective bottom layer is placed on it, and at least one side is provided with a light emitting component ;

The light source generated by the light-emitting component on the circuit substrate penetrates the transparent film, and the transparent film is provided with dots and a reflective layer on the circuit substrate, so that the light is evenly distributed on the transparent film and its Upper layer touch components;

Secondly, a method for manufacturing a light guide film key module is provided, which is characterized in that: the steps include:

forming a button symbol layer on at least one side of the touch component;

Paste an elastic layer under the touch component;

Lay a transparent film with dots printed on the bottom of the elastic layer;

Finally, a circuit substrate is placed under the transparent film, the circuit substrate is provided with a plurality of conductive contacts corresponding to the touch component, and at least one side thereof is provided with a light emitting component;

Description of drawings

Fig. 1 is the cross-sectional view of the light guide film button module of the present invention;

Fig. 2 is the upper view of the circuit substrate of the light guide film button module of the present invention;

3 is a top view of the touch component of the light guide film key module of the present invention;

Fig. 4 is a schematic diagram of the light source penetrating the transparent film of the light guide film button module of the present invention;

5 is a schematic diagram of another embodiment of the light guide film key module of the present invention;

Fig. 6 is a schematic diagram of another embodiment of the light guide film button module of the present invention through which the light source penetrates the transparent film;

FIG. 7 is a flow chart of manufacturing the light guide film key module of the present invention.

Explanation of reference signs: 10-touch component; 11-key; 12-key symbol layer; 20-elastic layer; 30-transparent film; 31-dot; 32-guide pillar; 33-reflective layer; 41-light-emitting component; 42-conductive contact; 43-reflective bottom layer.

Detailed ways

In order to make it easier for your examiners to understand the content of the present invention and the effects that can be achieved, a specific embodiment is hereby listed in conjunction with the diagram, and the details are as follows:

First, please refer to FIG. 1 and FIG. 2 , which are respectively a schematic cross-sectional view of the light guide film key module of the present invention, and a top view of the circuit substrate and the touch control component. It includes: a transparent touch component 10, the touch component 10 is a touch panel or key 11, and at least one key symbol layer 12 is printed or etched under the touch component 10, the The button symbol layer 12 can be a button symbol composed of English letters, English words, phonetic symbols, punctuation marks or mathematical symbols;

An elastic layer 20 is a rubber material juxtaposed under the key symbol layer 12;

A transparent film 30 is placed below the elastic layer 20, and one side thereof is printed with dots 31; and

A circuit substrate 40 is placed under the transparent film 30, and its surface is provided with a plurality of conductive contacts 42 corresponding to the touch component 10. The conductive contacts 42 are arc-shaped, A reflective bottom layer 43 is placed on it, and a light-emitting component 41 is provided on at least one side thereof.

In addition, the bottom surface of the transparent film 30 must also be provided with a plurality of guide posts 32, as shown in FIG. 1 .

In the light guide film button module combined by the above components, the light-emitting component 41 on the circuit substrate 40 generates light to form a light source, and the light source penetrates the transparent film 30, and the transparent film 30 is provided with dots 31 and A reflective bottom layer 43 is placed on the circuit substrate 40, so that the light can be evenly distributed on the transparent film 30 and the touch control component 10 on the upper layer (please refer to FIG. 4). Its light source is through the network dot 31 on the transparent film 30 and the effect of reflective bottom layer 43, can improve to be seen distance and save electric energy; Moreover, transparent film 30 is frivolous, and can make button become frivolous and short at will.

Furthermore, please refer to another embodiment of the present invention shown in FIG. 5 , which is provided with a plurality of light-emitting components 41 and a plurality of conductive contacts 42 corresponding to the touch control component 10 on the surface of the circuit substrate 40 , and The reflective bottom layer 43 is installed on the light-emitting component 41 and placed on the surface of the circuit substrate 40. On one side of the transparent film 30, a reflective layer 33 corresponding to the light-emitting component 41 must be set, so that the reflective bottom layer 43 is compatible with the reflective layer of the transparent film 30. 33 phases interleaved.

In the light guide film key module combined by the above components, the light-emitting component 41 on the circuit substrate 40 generates light to form a light source, and the light source penetrates the transparent film 30, and the transparent film is provided with dots 31 and circuits. A reflective bottom layer 43 is placed on the substrate 40, so that the light can be evenly distributed on the transparent film 30 and the touch control component 41 on the upper layer (please refer to FIG. 6). Its light source is through the effect of dot 31 on the transparent film 30 and reflective layer 33, can improve and be seen distance and save electric energy; Moreover, transparent film 30 is frivolous, and can make button become frivolous and short accordingly.

Secondly, please refer to FIG. 7, which is a flow chart of the manufacturing method of the light guide film key module, and its steps include:

Printing or etching a button symbol layer on one side of touch components such as buttons or touch panels;

Paste an elastic layer below the touch component;

Firstly, dots are printed on one side of a transparent film, and then pasted under the elastic layer, and the bottom surface of the transparent film has to form a plurality of guide pillars;

Finally, a circuit substrate is placed under the aforementioned transparent film, and a plurality of light-emitting components, a plurality of conductive contacts and a reflective bottom layer are arranged on the circuit substrate, and the conductive contacts correspond to the touch control components; wherein, the The light-emitting component is arranged on the side edge of the circuit substrate, and the reflective bottom layer is arranged on the circuit substrate.

The light guide film button module manufactured through the above steps has a transparent film between the touch component and the circuit substrate, and dots are printed on one side of the transparent film and a reflective bottom layer is placed on the circuit substrate. The overall production and construction It is relatively easy, can improve efficiency and save manufacturing costs, and can be customized according to the needs of customers in various sizes and shapes.

Furthermore, the circuit substrate must also be provided with a plurality of light-emitting components, and a reflective bottom layer is placed on the circuit substrate to penetrate the light-emitting components, and a reflective layer is printed on one side of the transparent film, and the reflective bottom layer and the transparent film The reflective layers are interlaced or arranged on the surface of the circuit substrate and correspond to the transparent thin film reflective layer (refer to FIG. 5 again).

To sum up, this case is not only truly innovative in terms of manufacturing steps and spatial form, but also can improve the efficacy of existing items. It should have fully met the statutory requirements for novelty and advancement, and the application should be filed according to law.

The above descriptions are only preferred embodiments of the present invention, and are only illustrative rather than restrictive to the present invention. Those skilled in the art understand that many changes, modifications, and even equivalents can be made within the spirit and scope defined by the claims of the present invention, but all will fall within the protection scope of the present invention.

Claims (14)

1. A light guide film button module, characterized in that: it comprises: A touch component, which has a key symbol layer; An elastic layer is placed under the touch component; a transparent film placed below the elastic layer, one side of which is printed with dots; and A circuit substrate is placed under the transparent film, and its surface is provided with a plurality of conductive contacts corresponding to the touch component, a reflective bottom layer is placed on it, and at least one side is provided with a light emitting component ; The light source generated by the light-emitting component on the circuit substrate penetrates the transparent film, and the transparent film is provided with dots and a reflective layer on the circuit substrate, so that the light is evenly distributed on the transparent film and its Upper layer touch components. 2 . The light guide film key module according to claim 1 , wherein the touch component is a key. 3 . 3 . The light guide film key module according to claim 1 , wherein the key symbol layer has light-transmitting English letters, English words, phonetic symbols, punctuation marks or mathematical symbols. 4 . 4. The light guide film key module according to claim 1, wherein the elastic layer is made of rubber. 5 . The light guide film key module according to claim 1 , wherein the conductive contact is in the shape of an arc. 5 . 6. A light guide film button module according to claim 1, characterized in that: the circuit substrate is provided with a plurality of light-emitting components and a plurality of conductive contacts corresponding to the touch control components, and the A reflective bottom layer is pierced on the light-emitting component. 7. The light guide film key module according to claim 6, characterized in that: one side of the transparent film on the light-emitting component is provided with a corresponding reflective layer. 8 . The light guide film key module according to claim 1 , wherein the bottom surface of the transparent film further includes a plurality of guide posts. 9. A method for manufacturing a light guide film key module, characterized in that: the steps include: forming a button symbol layer on at least one side of the touch component; Paste an elastic layer under the touch component; Lay a transparent film with dots printed on the bottom of the elastic layer; Finally, a circuit substrate is placed under the transparent film. The circuit substrate is provided with a plurality of conductive contacts corresponding to the touch component, and at least one side thereof is provided with a light emitting component. 10 . The method for manufacturing a light guide film key module according to claim 9 , wherein the key symbol layer is printed or etched on the touch component. 11 . 11. The method for manufacturing a light guide film key module according to claim 9, wherein the elastic layer is made of rubber. 12 . The method for manufacturing a light guide film key module according to claim 9 , wherein a plurality of guide pillars are formed on the bottom surface of the transparent film. 13 . 13. The manufacturing method of a light guide film key module according to claim 9 or 12, characterized in that: the circuit substrate is provided with a plurality of light-emitting components and a plurality of conductive elements corresponding to the touch components. a contact piece, and a reflective bottom layer is pierced on the light-emitting component. 14 . The method for manufacturing a light guide film key module according to claim 13 , wherein said plurality of light-emitting components are provided with a reflective layer corresponding to one side of said transparent film. 15 .

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