Metal touch module, electronic device and control method thereof

Abstract

The present application discloses a metal touch module, an electronic device and a control method thereof, wherein the metal touch module comprises: a backlight module and a metal panel arranged opposite to each other; a sensor layer located between the backlight module and the metal panel; the backlight module comprises an LED circuit board and a plurality of LEDs located on the surface of the LED circuit board facing the metal panel and electrically connected to the LED circuit board; the metal panel comprises a plurality of key areas, each of which comprises a plurality of first through holes penetrating the metal panel, and the plurality of first through holes constitute a key icon; the sensor layer is provided with a plurality of second through holes corresponding to the key area, for sensing touch, and when the plurality of LEDs are lit, the light emitted by the plurality of LEDs illuminates the key icon through the plurality of first through holes and the second through holes. The metal touch module provided by the present invention has a night vision function, and can quickly and conveniently find the key even in a dark environment.

Description

Technical Field

[0001] The present invention relates to the field of intelligent security technology, and in particular to a metal touch module, an electronic device and a control method thereof. Background Art

[0002] In the prior art, electronic devices involving password input are usually provided with physical buttons, and electronic password input is realized by pressing different buttons. In order to improve the user experience, with the development of password input devices, the password input panel in the electronic device is usually formed of transparent materials such as plastic or glass, and a backlight is set at the button position for display, so that the button area can be illuminated, which is convenient for user operation.

[0003] Since password input panels made of plastic or glass have poor mechanical strength and short service life, electronic devices have gradually adopted metal key panels in order to improve the mechanical strength of the password input panels.

[0004] However, metal is opaque, so the button area is sprayed, printed, or laser engraved with graphics to guide users. However, in a dark environment, the metal button panel does not have a backlight and does not have a night vision function, making the metal button panel inconvenient to use. Summary of the invention

[0005] In view of this, the present invention provides a metal touch module, an electronic device and a control method thereof to solve the problem in the prior art that when the environment is relatively dark, the metal password input key panel has no backlight, no night vision function, and is inconvenient to use.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A metal touch module, comprising:

[0008] A backlight module and a metal panel are arranged opposite to each other;

[0009] A sensor layer located between the backlight module and the metal panel;

[0010] The backlight module includes an LED circuit board and a plurality of LEDs located on a surface of the LED circuit board facing the metal panel and electrically connected to the LED circuit board;

[0011] The metal panel includes a plurality of key areas, each of which includes a plurality of first through holes penetrating the metal panel, and the plurality of first through holes form a key icon;

[0012] The sensor layer is provided with a plurality of second through holes corresponding to the key area for sensing touch, and when the plurality of LEDs are lit, the light emitted by the plurality of LEDs illuminates the key icons through the plurality of first through holes and the second through holes.

[0013] Preferably, the sensor layer is a pressure sensor layer.

[0014] Preferably, there is a gap between the pressure sensor layer and the metal panel to form a capacitive pressure sensor.

[0015] Preferably, the pressure sensor layer is a piezoresistive material layer, which is in close contact with the surface of the metal panel to form a resistive pressure sensor.

[0016] Preferably, the piezoresistive material layer is made of graphene.

[0017] Preferably, the first through hole is a circular through hole, and the aperture of the first through hole is 0.02 mm-0.03 mm, including the endpoint values.

[0018] Preferably, the first through hole is formed by laser drilling process.

[0019] The present invention also provides an electronic device, comprising any one of the metal touch modules and controllers described above;

[0020] When the controller detects that the metal touch module is touched and the password input is correct, the electronic device is unlocked.

[0021] Preferably, the electronic device is an electronic door lock.

[0022] The present invention also provides an electronic device control method, wherein the electronic device control unit includes a touch module, a controller and an LED, wherein the controller is connected to the touch module and the LED respectively, and the electronic device control method includes:

[0023] Detecting whether the touch module is touched;

[0024] If yes, then control the LED to light up;

[0025] Detecting whether the keys of the touch module are pressed, and whether the pressing order of the keys is a preset order;

[0026] If yes, the electronic device is controlled to unlock.

[0027] It can be known from the above technical scheme that the metal touch module provided by the present invention includes a metal panel, a sensor layer located below the metal panel and a backlight module, wherein the sensor layer is used to realize the key function, that is, sensing touch, and is provided with a second through hole that penetrates the sensor layer and corresponds to the key icon on the metal panel, and the backlight module includes a circuit board and an LED. After the LED is lit, the emitted light passes through the second through hole of the sensor layer and then passes through the first through hole on the metal panel, so that the key icon is lit, thereby making the metal touch module have a night vision function, and the key can be found quickly and conveniently even in a dark environment.

[0028] On the other hand, the metal touch module provided by the present invention uses a sensor layer to sense touch, and can realize key recognition without applying excessive pressure to the metal panel. Compared with the existing technology using spraying, printing or laser engraving patterns, which fade and expose the password keys after long-term strong pressing, the metal touch module provided by the present invention will not expose the password keys even if used for a long time.

[0029] On the other hand, since the metal touch module provided by the present invention has an integrally formed metal panel, it is sufficient to only provide a plurality of first through holes penetrating the metal panel to form key icons, so the structure is simple and the manufacturing process is relatively simple.

[0030] The present invention further provides an electronic device, comprising the metal touch module described above, which has a night vision function, making it more convenient to unlock the electronic device.

[0031] The present invention also provides an electronic device control method for realizing control of the electronic device, and performing unlocking control on the electronic device according to whether the metal touch module is touched and according to a preset interaction logic. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0033] Figure 1 A schematic diagram of an exploded structure of a metal touch module provided by an embodiment of the present invention;

[0034] Figure 2 A schematic diagram of a top view structure of a metal touch module provided by an embodiment of the present invention;

[0035] Figure 3 A schematic diagram of the structure of a capacitive pressure sensor provided by an embodiment of the present invention;

[0036] Figure 4 A schematic diagram of the structure of a resistance pressure sensor provided by an embodiment of the present invention;

[0037] Figure 5 A schematic diagram of the structure of an electronic door lock provided by an embodiment of the present invention;

[0038] Figure 6 for Figure 5 Schematic diagram of the cross-sectional structure along line AA';

[0039] Figure 7 A structural block diagram of an electronic device provided by an embodiment of the present invention;

[0040] Figure 8 A schematic diagram of the structure of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0041] As described in the background technology section, in the prior art, the metal panel is in a dark environment and no backlight is provided on the metal key panel, which makes the metal key panel inconvenient to use.

[0042] The inventors found that the reason for the above phenomenon is that the metal panel itself is not light-transmissive, and it is impossible to set a backlight on the back to illuminate the key area on the metal panel. In the prior art, the method of spraying, printing or laser engraving is usually used to form key graphics on the surface of the metal panel to guide users to use it, and even fluorescent powder is used to increase the brightness of the key graphics. However, due to the problem of discoloration and fading of spraying and printing graphics; and the key panel with added fluorescent powder, in dark or dim environments, there is still the problem that the keys cannot be seen clearly, and the fluorescent powder is used to achieve the night vision function. After a long time, the fluorescent powder ages, and the effect of illuminating the key area becomes worse and worse, resulting in a poor user experience.

[0043] Based on this, the present invention provides a metal touch module, comprising:

[0044] A backlight module and a metal panel are arranged opposite to each other;

[0045] A sensor layer located between the backlight module and the metal panel;

[0046] The backlight module includes an LED circuit board and a plurality of LEDs located on a surface of the LED circuit board facing the metal panel and electrically connected to the LED circuit board;

[0047] The metal panel includes a plurality of key areas, each of which includes a plurality of first through holes penetrating the metal panel, and the plurality of first through holes form a key icon;

[0048] The sensor layer is provided with a plurality of second through holes corresponding to the key area for sensing touch, and when the plurality of LEDs are lit, the light emitted by the plurality of LEDs illuminates the key icons through the plurality of first through holes and the second through holes.

[0049] Since the metal touch panel has multiple first through holes, and the first through holes form key icons, they can be used to identify different keys. The metal touch module also includes a backlight module, in which multiple LEDs are arranged. When the LEDs are lit, the emitted light can pass through the first through holes, so that the key icons have a certain brightness, so that the metal key panel has a backlight function. In a dark environment, it also has a good night vision function, making the metal key panel more convenient to use.

[0050] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0051] See also Figure 1 and Figure 2 As shown, Figure 1 A schematic diagram of an exploded structure of a metal touch module provided by an embodiment of the present invention, Figure 2 A schematic diagram of a top view of a metal touch module provided by an embodiment of the present invention.

[0052] The metal touch module comprises:

[0053] A backlight module c and a metal panel a are arranged opposite to each other;

[0054] A sensor layer b located between the backlight module c and the metal panel a;

[0055] The backlight module c comprises an LED circuit board c1 and a plurality of LEDs c2 located on the surface of the LED circuit board c1 facing the metal panel a and electrically connected to the LED circuit board c1;

[0056] The metal panel a includes a plurality of key areas a2, each of which includes a plurality of first through holes a1 penetrating the metal panel a, and the plurality of first through holes a1 form a key icon;

[0057] The sensor layer b is provided with a plurality of second through holes b2 corresponding to the key area a2 for sensing touch, and when the plurality of LEDs c2 are lit, the light emitted by the plurality of LEDs c2 illuminates the key icons through the plurality of first through holes a1 and the second through holes b2.

[0058] It should be noted that the specific pattern shape of the key icon is not limited in this embodiment. Optionally, the key icon can be a number, a symbol or a pattern; for example, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, *, #, @, &, $, etc. Figure 2 As shown in the figure, in this embodiment, numbers and symbols are used as examples for explanation, and the password key icons on the metal panel of the metal touch module are ten numbers 0 to 9 and two symbols * and #. In other embodiments of the present invention, the key icons can also be composed of other patterns, which is not limited in the present invention.

[0059] The shape of the projection of the first through hole a1 on the metal panel may be circular, triangular, rectangular or polygonal, which is not limited in this embodiment.

[0060] In this embodiment, the specific size of the first through hole a1 is not limited. In order to allow the first through hole to pass light, but to prevent sweat or moisture from entering the metal touch module when the finger touches it, and to corrode the components inside the metal touch module, the size of the first through hole a1 in this embodiment is controlled to be 0.03 mm or less. For example, if the shape of the first through hole a1 is a square, the side length of the square is controlled to be 0.03 mm or less. If the projection of the first through hole a1 on the metal panel is a circle, the aperture of the first through hole a1 is controlled to be 0.03 mm or less, as long as the first through hole a1 can pass the light emitted by the LED but not water vapor.

[0061] It should be noted that the first through hole a1 can be formed by different processes. The specific forming process of the first through hole a1 is not limited in this embodiment. In order to ensure that the first through hole can guide light but not pass water, and avoid problems such as water intrusion or dust accumulation, the first through hole a1 is optionally formed by a laser punching process. In order to facilitate the metal panel to be punched by a certain laser to form the first through hole, the key area a2 of the metal panel is formed by a thinner aluminum plate or stainless steel plate. The thickness of the optional metal panel in this embodiment is about 0.15 mm, and the area outside the key area a2 can use a thicker metal panel, which can enhance the user's pressing feel and increase the service life of the panel.

[0062] When the size of the first through hole a1 is smaller, the difficulty of the manufacturing process is greatly increased. Therefore, in this embodiment, the size of the first through hole a1 is optionally controlled to be above 0.02 mm, that is, the size range of the first through hole a1 in this embodiment is 0.02 mm-0.03 mm, including the end value. If the first through hole is a circular hole, the corresponding aperture range is 0.02 mm-0.03 mm, including the end value.

[0063] Since the size of the first through hole a1 is relatively small, in order to ensure that the light passing through the first through hole can illuminate the key icon, in this embodiment, it is optional that the multiple LEDs use laser LEDs with strong collimation. Since the laser LED has strong collimation, the light emitted has a certain directionality, so that the light emitted by the LED can be irradiated to the key area on the metal panel as much as possible, while reducing the light emitted from the side, thereby ensuring the light passing through the first through hole a1 at the key icon position, which is convenient for users to identify the key area.

[0064] It should be noted that the specific material and color of the LED are not limited in this embodiment. The color of the LED can be a unified single color, that is, the colors of multiple LEDs are the same, all of which are a certain color, such as red, green, yellow or blue; or the color of the LED can include multiple colors, such as some LEDs are the same color, and some LEDs are another color. Moreover, the arrangement of multiple LED particles is not limited in this embodiment. LEDs of different colors can be arranged alternately and repeatedly to form an LED matrix to provide backlight for the metal panel. The LEDs of the same color among the multiple LEDs can also be arranged in the shape of a key icon in the corresponding key area, so that the key icon and the LED lights in other areas display different colors.

[0065] The key touch principle of the metal touch module in this embodiment is: when a finger touches each key area, the sensor layer of the corresponding key area detects the finger touch signal, thereby controlling the number or symbol corresponding to the key to be input.

[0066] In this embodiment, the specific structure of the sensor layer is not limited, and the sensor layer can be a pressure sensor layer or a photoelectric sensor layer. In this embodiment, the sensor layer b is optionally a pressure sensor layer. The pressure sensor layer can be a capacitive pressure sensor or a resistive pressure sensor, and the principle is to convert the pressure generated by the touch into an electrical signal so that the circuit can detect and thus identify that the key is touched.

[0067] Specifically, when the pressure sensor layer b is provided, a gap is provided between the pressure sensor layer b and the metal panel a, so that a flat capacitor is formed between the pressure sensor layer b and the metal panel a, and touch detection is achieved through the capacitance change. When the pressure sensor layer b is formed of a piezoresistive material, the piezoresistive material is closely attached to the surface of the metal panel to form a resistive pressure sensor. In this embodiment, the specific material of the piezoresistive material is not limited, as long as it can be deformed under pressure, thereby causing a change in resistance. In one embodiment of the present invention, the piezoresistive material is graphene.

[0068] See also Figure 3 , a capacitive pressure sensor structure provided by an embodiment of the present invention, the capacitive pressure sensor structure is formed by a metal panel a and a sensor layer b with a certain distance, and the two form a capacitive model. Capacitance C = εS / 4πkd; each key area forms a capacitive model, and the sensor layer b and the metal panel a serve as two plates of the capacitor respectively. A certain gap needs to be left between the sensor layer b and the metal panel a, which can be achieved by thinning the key area corresponding to the metal panel a, which varies according to the hardness of the metal panel, generally between 0.1mm-0.2mm. The key area corresponding to the metal panel can be 0.4mm-0.5mm. When the key part of the metal panel is pressed, the pressed area is deformed, resulting in a change in the distance d between the sensor layer and the metal panel, and the capacitance C of the capacitive model changes. When the capacitive pressure sensor driver IC detects that the change in C reaches the set value, the key is considered valid.

[0069] See also Figure 4 , is a schematic diagram of the structure of a resistive pressure sensor provided in an embodiment of the present invention; in this embodiment, the resistive sensor is mainly made of piezoresistive materials, such as graphene materials. There must be no gap between the sensor layer b and the metal panel a, and the sensor layer b formed by the piezoresistive material must be tightly attached to the bottom surface of the metal panel a. Each button requires a sensor. When the surface of the metal panel a is pressed, the metal panel a is slightly deformed, and the pressure is transferred to the sensor layer b, and the resistance value of the sensor layer b changes. When the resistive pressure sensor driver IC detects that the set value is reached, the button is considered valid.

[0070] The metal touch module provided in this embodiment includes a metal panel, a sensor layer located below the metal panel, and a backlight module, wherein the sensor layer is used to realize the key function, that is, sensing touch, and is provided with a second through hole that penetrates the sensor layer and corresponds to the key icon on the metal panel. The backlight module includes a circuit board and an LED. After the LED is lit, the emitted light passes through the second through hole of the sensor layer and then passes through the first through hole on the metal panel, so that the key icon is lit, thereby enabling the metal touch module to have a night vision function, so that the key can be found quickly and conveniently even in a dark environment.

[0071] On the other hand, the metal touch module provided by the present invention uses a sensor layer to sense touch, and can realize key recognition without applying excessive pressure to the metal panel. Compared with the existing technology using spraying, printing or laser engraving patterns, which fade and expose the password keys after long-term strong pressing, the metal touch module provided by the present invention will not expose the password keys even if used for a long time.

[0072] On the other hand, since the metal touch module provided by the present invention has an integrally formed metal panel, it is sufficient to only provide a plurality of first through holes penetrating the metal panel to form key icons, so the structure is simple and the manufacturing process is relatively simple.

[0073] An embodiment of the present invention further provides an electronic device, comprising the metal touch module and a controller described in the above embodiment; when the controller detects that the metal touch module is touched and a password is input correctly, the electronic device is unlocked.

[0074] The specific form of the electronic device is not limited in this embodiment. The electronic device may be an electronic door lock or a safe switch. In this embodiment, an electronic door lock is used as an example for description. Figure 5 , which is a schematic diagram of the structure of an electronic door lock provided in an embodiment of the present invention; the electronic door lock 100 includes a metal touch module 110 and a door handle 120 .

[0075] Among them, see Figure 6 ,for Figure 5 The schematic diagram of the cross-sectional structure of the metal touch module 110 along the AA′ line in the structure shown, the metal touch module 110 includes: a metal panel 1, a sensor layer 2 and a backlight module 3 from top to bottom.

[0076] In the embodiment of the present invention, the password input area of ​​the electronic door lock is designed as a metal touch module, which has a night vision function, so that in a dark environment, the metal panel area can be touched to light up and display different button patterns, thereby making it convenient for users to input passwords.

[0077] In this embodiment, the electronic device can refer to Figure 7 ,like Figure 7As shown, the electronic device further includes a controller (MCU) 102, and the controller 102 is connected to the touch module 101 and the LED 103, respectively, wherein the touch module 101 is the metal panel of the metal touch module in the embodiment of the present invention; and the LED 103 is the backlight module 3 of the metal touch module in the embodiment of the present invention. By touching the touch module 101 described in this embodiment, that is, the metal touch module, the sensor layer 2 therein senses whether there is a touch, and then sends the sensing signal to the controller 102, and the controller 102 then lights up the LED 3 according to the sensing signal to achieve lighting. For a specific structural diagram, please refer to Figure 8 .

[0078] It should be noted that the lighting control method of the LED lights in the backlight module is not limited in this embodiment. Optionally, the LED lights in each key area can be lit individually or uniformly. When the LED lights are uniformly controlled to be lit, auxiliary equipment can be set, such as a sound prompt device. When the user presses a key, a "beep" sound is prompted to facilitate the user to determine whether the key has been pressed. When the LED lights are individually lit, the brightness of the LED corresponding to the pressed key can be controlled to prompt the user that the key has been pressed by flashing or changing the brightness of the key LED light.

[0079] Correspondingly, an embodiment of the present invention provides an electronic device control method for realizing the control of an electronic device, wherein the electronic device is the electronic device as described above including a touch module, a controller and an LED, wherein the electronic device control method includes: detecting whether the touch module is touched; if so, controlling the LED to light up; detecting whether a button of the touch module is pressed, and the order in which the buttons are pressed is a preset order; if so, controlling the electronic device to unlock.

[0080] Please continue to see Figure 7 As shown, the controller MCU102 detects that the first button in the touch module 101 is pressed, or detects that other human-computer interactions of the electronic device are triggered. The controller MCU controls the LED to light up according to the pre-set interaction logic, thereby triggering the night vision function to facilitate the user to press the button. When the key sequence is the correct password, the electronic device is controlled to unlock.

[0081] It should be noted that, usually, the smart electronic door lock is a battery-powered product. If the backlight is always on, it will consume a lot of power and cause light pollution. Therefore, usually, the backlight of the electronic door lock is not lit, and the characters on the metal panel are hidden. The backlight can be lit by touching the password key area at will. The key characters can be clearly seen after lighting up. Therefore, when the user walks to the door and needs to enter the password, by touching any key on the metal panel of the metal touch module, the touch module 101 senses the touch and transmits the electrical signal to the controller 102, and the controller 102 controls the LED 103 to light up uniformly; then, the user presses different keys to enter the password, and the touch module 101 detects the different keys pressed by the user, and emits a prompt sound or controls the brightness display of the LED 103 to prompt the user whether a key has been pressed, thereby completing the password input.

[0082] In this embodiment, the specific control method is not limited. Among them, the lighting of the LED lights is uniformly controlled, the control circuit is simpler, and all LEDs can be controlled by one I / O; while the lighting of the LED lights is individually controlled, other auxiliary prompt structures can be saved, and it can be intuitively reflected which specific button is pressed.

[0083] It should be noted that the specific structure of the electronic device is not limited in this embodiment. The electronic device in the present invention may also be terminal equipment such as an ATM machine, a self-service terminal, or a household device such as an oven or a refrigerator.

[0084] The electronic device provided in the embodiment of the present invention adopts the metal touch module described in the above embodiment, which can realize password key input; because it provides a backlight display and has the effect of prompting the user, especially in a dim or dark environment, the key area is clearly displayed, which is convenient for the user to identify the key; in addition, the key panel of the electronic device provided in this embodiment is a metal panel, which has stronger mechanical strength than the plastic or glass panel in the prior art, ensures the mechanical strength of the product, and has a longer service life. Moreover, since the metal panel of the electronic device is an integrated structure, it helps to achieve waterproofing of the electronic device.

[0085] In addition, the prior art uses spraying, silk-screening or laser engraving of key graphics, which has the risk of fading after long-term use. If the password is frequently touched and faded, the numbers of the password keys are easily known to the outside world. Moreover, at night or in dim ambient light, users cannot correctly identify the specific positions of each key in the key area, resulting in password input errors and poor user experience. In the present invention, the key icon on the metal panel is composed of multiple first through holes formed by laser drilling, and is illuminated by a backlight module to realize the display of the key icon. There is no risk of fading and leaking the password. Moreover, it has a night vision function and is also applicable in dark environments.

[0086] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0087] It should also be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that an article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such article or device. In the absence of further restrictions, the elements defined by the sentence "comprising a ..." do not exclude the existence of other identical elements in the article or device including the above elements.

[0088] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A metal touch module, characterized in that: include: A backlight module and a metal panel are arranged opposite to each other; A sensor layer located between the backlight module and the metal panel; The backlight module includes an LED circuit board and a plurality of LEDs located on the surface of the LED circuit board facing the metal panel and electrically connected to the LED circuit board; the LEDs are laser LEDs; The metal panel includes a plurality of key areas, each of which includes a plurality of first through holes penetrating the metal panel, and the plurality of first through holes form a key icon; the first through holes can guide light but not pass moisture; The sensor layer is provided with a plurality of second through holes corresponding to the key area for sensing touch, and when the plurality of LEDs are lit, the light emitted by the plurality of LEDs illuminates the key icon through the plurality of first through holes and the second through holes; The first through hole is a circular through hole, and the aperture of the first through hole is 0.02 mm-0.03 mm, including the endpoint values.

2. The metal touch module according to claim 1, characterized in that: The sensor layer is a pressure sensor layer.

3. The metal touch module according to claim 2, characterized in that: There is a gap between the pressure sensor layer and the metal panel to form a capacitive pressure sensor.

4. The metal touch module according to claim 2, characterized in that: The pressure sensor layer is a piezoresistive material layer, which is in close contact with the surface of the metal panel to form a resistance pressure sensor.

5. The metal touch module according to claim 4, characterized in that: The material of the piezoresistive material layer is graphene.

6. The metal touch module according to claim 1, characterized in that: The first through hole is formed by laser drilling process.

7. An electronic device, characterized in that: A metal touch module and a controller comprising any one of claims 1 to 6; When the controller detects that the metal touch module is touched and the password input is correct, the electronic device is unlocked.

8. The electronic device according to claim 7, characterized in that: The electronic device is an electronic door lock.

9. A method for controlling an electronic device, characterized in that: The electronic device control unit includes a touch module, a controller and an LED, the controller is connected to the touch module and the LED respectively, and the electronic device control method includes: Detecting whether the touch module is touched; If yes, then control the LED to light up; the LED is a laser LED; Detecting whether the keys of the touch module are pressed, and whether the pressing order of the keys is a preset order; If yes, the electronic device is controlled to unlock.

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