阅读说明：本技术 一种能兼顾按键手感和按键背光的薄膜开关生产工艺方法 (Production process method of membrane switch capable of giving consideration to both key hand feeling and key backlight ) 是由 谭玲芝 于 2021-08-12 设计创作，主要内容包括：本发明公开了一种能兼顾按键手感和按键背光的薄膜开关生产工艺方法,包括以下步骤：设置线路层对其一侧设置线键层和面键层,且面键层与线键层之间设有加厚层,对线路层表面打孔以配合安装LED光源,其中LED光源的导光材制设置为透明TPE材料,面键层的一侧设置面板层,且面板层表面需在按键处一体化成型打凸结构,确保按键打凸结构与LED光源位置对应,对线路层供电以测试LED光源确保其正常亮灯工作,对线路层、线键层、面键层、加厚层、LED光源和透明TPE导光材料一体化冲形,形成薄膜开关基体。本发明的薄膜开关背光按键,采用透明TPE工艺,保证按键背光均匀性的同时,提高按键手感,且降低了成本。(The invention discloses a production process method of a membrane switch capable of giving consideration to both key hand feeling and key backlight, which comprises the following steps: set up the circuit layer and set up line key layer and face key layer to its one side, and be equipped with the thickening layer between face key layer and the line key layer, punch with the cooperation installation LED light source to the circuit layer surface, wherein the leaded light material system of LED light source sets up to transparent TPE material, one side of face key layer sets up the panel layer, and panel layer surface need be in the integrated shaping of button department and beat protruding structure, it beats protruding structure and LED light source position and corresponds to ensure the button, supply power with the test LED light source to the circuit layer and ensure its work of normally shining the lamp, to the circuit layer, the line key layer, the face key layer, the thickening layer, LED light source and transparent TPE leaded light material integration are towards the shape, form the membrane switch base member. The backlight key of the thin film switch adopts the transparent TPE process, so that the backlight uniformity of the key is ensured, the hand feeling of the key is improved, and the cost is reduced.)

1. A production process method of a membrane switch capable of giving consideration to both key hand feeling and key backlight is characterized by comprising the following steps: the method comprises the following steps:

s1, arranging a line key layer and a surface key layer on one side of the line layer, arranging a thickening layer between the surface key layer and the surface key layer, punching the surface of the line layer to be matched with an LED light source, wherein the light guide material of the LED light source is made of transparent TPE material;

s2, arranging a panel layer on one side of the surface key layer, integrally forming a protruding structure on the surface of the panel layer at the key position to ensure that the protruding structure of the key corresponds to the LED light source position, and supplying power to the circuit layer to test the LED light source to ensure that the LED light source works normally;

s3, integrally punching a circuit layer, a line key layer, a surface key layer, a thickening layer, an LED light source and a transparent TPE light guide material to form a thin film switch matrix of TPE backlight keys;

s4, embedding and installing the elastic sheet type fixing strip into the thin film switch matrix, performing steps of punching and pressing a pin by using the thin film switch matrix of a pin machine team, and then testing the installed pin by using a pin detection machine to ensure that the pin is normally operated;

s5, attaching tpe back glue to one side of the membrane switch, and laying tpe spacers by matching with tpe back glue, so that the backlight key is ensured to be uniform in light emission without dark areas and shadows;

s6, performing backlight test on the film switch substrate after film pasting, inputting test current to the film switch, enabling the backlight key to normally emit light, measuring the brightness, chromaticity coordinates and uniformity of backlight, and ensuring that the backlight test requirements are met;

and S7, finally, carrying out finished product detection on the membrane switch substrate, ensuring normal use after assembly and ensuring that the surface strength is guaranteed, and packaging and shipping can be carried out.

2. The production process method of the membrane switch capable of giving consideration to both key hand feeling and key backlight according to claim 1, is characterized in that: in the S5, the tpe combined layer needs to be checked in advance before attaching the tpe gasket, so that the bubbles and wrinkles cannot be caused, and the combined layer needs to be selected before assembly and then used.

3. The production process method of the membrane switch capable of giving consideration to both key hand feeling and key backlight according to claim 2, is characterized in that: when the tpe gasket was bonded to the wiring layer, the 8A35 matte side faced the panel direction and the diffusion film faced the wiring direction.

4. The production process method of the membrane switch capable of giving consideration to both key hand feeling and key backlight according to claim 3, characterized in that: in the backlight test of S6, it is required to ensure that the surface of the substrate of the thin film switch is smooth and flat, and the surface has no black spots.

5. The production process method of the membrane switch capable of giving consideration to both key hand feeling and key backlight according to claim 1, is characterized in that: in the step S1, a laser drilling machine is used for drilling the circuit layer, the pulse width of the operating parameters of the laser drilling machine is 5 ms-8 ms, the energy is 4-5 mj, and the standard drilling aperture is 0.1-0.15 μm.

6. The production process method of the membrane switch capable of giving consideration to both key hand feeling and key backlight according to claim 1, is characterized in that: and after the S5 back glue layer is attached, placing the film switch matrix in a vacuum coating machine, introducing a coating material which is heated, vaporized and cracked into a vacuum chamber, cooling the vacuum chamber, carrying out vacuum coating operation on the surface of the circuit layer at normal temperature, taking out the film switch matrix until the coating thickness meets the requirement, and removing the coating layer at the exposed part of the film switch matrix.

7. The production process method of the membrane switch capable of giving consideration to both key hand feeling and key backlight according to claim 1, is characterized in that: and (3) detecting a finished product in S7, solving the problems that a light-transmitting key cannot be printed by using a scraper trace or impurities, and a light-transmitting and sand-eye phenomenon cannot occur in a solid color area under strong light, so that normal use and surface strength after assembly are ensured, and packaging and delivery can be realized.

8. The production process method of the membrane switch capable of giving consideration to both key hand feeling and key backlight according to claim 1, is characterized in that: the specification of the membrane switch substrate is measured by a vernier caliper to ensure that various requirements of normal finished products are met.

Technical Field

The invention belongs to the technical field of thin film switch processing, and particularly relates to a thin film switch production process method capable of giving consideration to both key hand feeling and key backlight.

Background

The membrane switch structure of the backlight key of the prior art board tpe is single, and the following problems generally exist:

1. the backlight key is manufactured by adopting a cold light sheet process, so that the service life is short.

2. The backlight key is manufactured by adopting a light guide film or light guide plate process, so that the hand feeling of the key is poor.

Disclosure of Invention

The invention aims to overcome the defects in the prior art, and the transparent TPE process is adopted, so that the backlight uniformity of the key is ensured, the hand feeling of the key is improved, and the cost is reduced.

In order to achieve the purpose, the invention provides the following technical scheme:

a production process method of a membrane switch capable of giving consideration to both key hand feeling and key backlight comprises the following steps:

s1, arranging a line key layer and a surface key layer on one side of the line layer, arranging a thickening layer between the surface key layer and the surface key layer, punching the surface of the line layer to be matched with an LED light source, wherein the light guide material of the LED light source is made of transparent TPE material;

s2, arranging a panel layer on one side of the surface key layer, integrally forming a protruding structure on the surface of the panel layer at the key position to ensure that the protruding structure of the key corresponds to the LED light source position, and supplying power to the circuit layer to test the LED light source to ensure that the LED light source works normally;

s3, integrally punching a circuit layer, a line key layer, a surface key layer, a thickening layer, an LED light source and a transparent TPE light guide material to form a thin film switch matrix of TPE backlight keys;

s4, embedding and installing the elastic sheet type fixing strip into the thin film switch matrix, performing steps of punching and pressing a pin by using the thin film switch matrix of a pin machine team, and then testing the installed pin by using a pin detection machine to ensure that the pin is normally operated;

s5, attaching tpe back glue to one side of the membrane switch, and laying tpe spacers by matching with tpe back glue, so that the backlight key is ensured to be uniform in light emission without dark areas and shadows;

s6, performing backlight test on the film switch substrate after film pasting, inputting test current to the film switch, enabling the backlight key to normally emit light, measuring the brightness, chromaticity coordinates and uniformity of backlight, and ensuring that the backlight test requirements are met;

and S7, finally, carrying out finished product detection on the membrane switch substrate, ensuring normal use after assembly and ensuring that the surface strength is guaranteed, and packaging and shipping can be carried out.

Preferably, in S5, the tpe combined layer is checked before attaching the tpe gasket to prevent bubbles and wrinkles, and the combined layer is sorted before assembly and then used.

Preferably, when the tpe gasket is bonded to the wiring layer, the 8a35 matte surface faces the panel direction, and the diffusion film faces the downward wiring direction.

Preferably, the backlight test in S6 is to ensure that the surface of the film switch substrate is smooth and flat, and the surface has no black spots.

Preferably, in S1, a laser drilling machine is used to drill the circuit layer, and the operating parameters of the laser drilling machine include a pulse width of 5ms to 8ms, an energy of 4 to 5mj, and a standard drilling aperture of 0.1 to 0.15 μm.

Preferably, after the back adhesive layer of S5 is attached, the membrane switch substrate is placed in a vacuum coating machine, the coating material that is vaporized by heating and cracked is introduced into a vacuum chamber, the vacuum chamber is cooled, the vacuum coating operation is performed on the surface of the circuit layer at normal temperature until the coating thickness meets the requirement, the membrane switch substrate is taken out, and then the coating layer on the exposed portion of the membrane switch substrate is removed.

Preferably, in S7 finished product detection, need to ensure that printing of printing light-transmitting button can not use scraper trace or impurity problem, the solid color region can not have printing light-transmitting and sand hole phenomenon under the highlight, ensure to assemble back normal use and surface strength to some extent guarantee, can pack the shipment.

Preferably, the specification of the membrane switch substrate is measured by a vernier caliper to ensure that the requirements of a normal finished product are met.

The invention has the technical effects and advantages that:

according to the backlight key of the thin film switch, the transparent TPE process is adopted, the backlight effect and the hand feeling are improved according to the hardness adjustable characteristic and the light guide characteristic of the TPE, the backlight uniformity of the key is ensured, the hand feeling of the key is improved, and the cost is reduced.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

S1, arranging a line key layer and a surface key layer on one side of the line layer, arranging a thickening layer between the surface key layer and the surface key layer, punching the surface of the line layer to be matched with an LED light source, wherein the light guide material of the LED light source is made of transparent TPE material;

s2, arranging a panel layer on one side of the surface key layer, integrally forming a protruding structure on the surface of the panel layer at the key position to ensure that the protruding structure of the key corresponds to the LED light source position, and supplying power to the circuit layer to test the LED light source to ensure that the LED light source works normally;

s3, integrally punching a circuit layer, a line key layer, a surface key layer, a thickening layer, an LED light source and a transparent TPE light guide material to form a thin film switch matrix of TPE backlight keys;

s4, embedding and installing the elastic sheet type fixing strip into the thin film switch matrix, performing steps of punching and pressing a pin by using the thin film switch matrix of a pin machine team, and then testing the installed pin by using a pin detection machine to ensure that the pin is normally operated;

s5, attaching tpe back glue to one side of the thin film switch substrate, and laying tpe spacers in cooperation with tpe back glue, so that the backlight key is ensured to be uniform in light emission and free of dark areas and shadows;

s6, performing backlight test on the film switch substrate after film pasting, inputting test current to the film switch, enabling the backlight key to normally emit light, measuring the brightness, chromaticity coordinates and uniformity of backlight, and ensuring that the backlight test requirements are met;

s7, finally, carrying out finished product detection on the membrane switch, wherein the finished product detection needs to ensure that the printing of the light-transmitting key cannot use the scraper trace or impurities, the solid color region cannot have light transmission and sand hole phenomena under strong light, the normal use after assembly is ensured, the surface strength is guaranteed, and the membrane switch can be packaged and shipped.

Example 2

S1, arranging a line key layer and a face key layer on one side of the line layer, arranging a thickening layer between the face key layer and the face key layer, punching the surface of the line layer to be matched with an LED light source, wherein a light guide material of the LED light source is made into a transparent TPE material, specifically, a laser drilling machine is used for punching the line layer, the pulse width of the operating parameters of the laser drilling machine is 5-8 ms, the energy is 4-5 mj, and the standard drilling hole diameter is 0.1-0.15 mu m;

s2, arranging a panel layer on one side of the surface key layer, integrally forming a protruding structure on the surface of the panel layer at the key position to ensure that the protruding structure of the key corresponds to the LED light source position, and supplying power to the circuit layer to test the LED light source to ensure that the LED light source works normally;

s3, integrally punching a circuit layer, a line key layer, a surface key layer, a thickening layer, an LED light source and a transparent TPE light guide material to form a thin film switch matrix of TPE backlight keys;

s4, embedding and installing the elastic sheet type fixing strip into the thin film switch matrix, performing steps of punching and pressing a pin by using the thin film switch matrix of a pin machine team, and then testing the installed pin by using a pin detection machine to ensure that the pin is normally operated;

s5, tpe back glue is pasted on one side of the thin film switch substrate, a tpe gasket is laid by matching with tpe back glue, the backlight key is ensured to be uniform in light emission without dark space and shadow, a tpe combination layer is checked to be incapable of having bubbles and wrinkles before tpe gaskets are pasted, the combined layer is selected and then used before assembly, when tpe gaskets are pasted with the circuit layer, the 8A35 fog face faces the panel direction, a diffusion film faces the circuit direction, the thin film switch substrate is placed in a vacuum film coating machine after the back glue layer is pasted, a film coating material which is heated, vaporized and cracked is introduced into a vacuum chamber and is cooled in the vacuum chamber, vacuum film coating operation is carried out on the surface of the circuit layer at normal temperature, the thin film switch substrate is taken out until the film coating thickness meets the requirement, and then the film coating layer on the exposed part of the thin film switch substrate is removed;

s6, performing backlight test on the film switch substrate after film pasting, inputting test current to the film switch, enabling the backlight key to normally emit light, measuring the backlight brightness, chromaticity coordinates and uniformity to ensure that the backlight test requirements are met, wherein the backlight test needs to ensure that the surface of the film switch is smooth and flat and has no black spots, and the specification of the film switch is measured by a vernier caliper to ensure that the requirements of normal finished products are met;

s7, finally, carrying out finished product detection on the membrane switch, wherein the finished product detection needs to ensure that the printing of the light-transmitting key cannot use the scraper trace or impurities, the solid color region cannot have light transmission and sand hole phenomena under strong light, the normal use after assembly is ensured, the surface strength is guaranteed, and the membrane switch can be packaged and shipped.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.