CN111337984A - Electronic device - Google Patents

Abstract

The present invention provides an electronic device, including: the target function module comprises a circuit board, at least part of the surface of the circuit board is paved with a conductive layer, the conductive layer is disconnected with the ground, and the circuit board is grounded through a cable; the approach detection module comprises a capacitance acquisition unit, the capacitance acquisition unit is electrically connected with the conducting layer, and the approach detection module detects whether a user approaches the electronic equipment or not through the conducting layer. The invention enables the approach detection module to be free from arranging a separate detection antenna, thereby reducing the space occupied by the approach detection module.

Description

Electronic device

Technical Field

The present invention relates to the field of communications technologies, and in particular, to an electronic device.

Background

With the development of communication technology, various electronic devices are gradually applied and popularized. In the process of using the electronic device, it is sometimes necessary to detect whether the user approaches the electronic device, for example, in the process of controlling a Specific Absorption Rate (SAR) of the electronic device, it is necessary to detect whether the user approaches the electronic device, so as to determine whether the SAR needs to be reduced.

The prior art generally employs a capacitive proximity detection module provided with a detection antenna for sensing whether a user is approaching.

The existing electronic equipment is provided with a detection antenna aiming at a capacitive approach detection module, and the detection antenna needs to occupy assembly space, so that the space occupied by the approach detection module is large, and the development of lightness and thinness of the electronic equipment is not facilitated.

Disclosure of Invention

The embodiment of the invention provides electronic equipment, which aims to solve the problem that the existing electronic equipment needs to occupy a large space when approaching a detection module.

In order to solve the technical problem, the invention is realized as follows:

an embodiment of the present invention provides an electronic device, including:

the target function module comprises a circuit board, at least part of the surface of the circuit board is paved with a conductive layer, the conductive layer is disconnected with the ground, and the circuit board is grounded through a cable;

the approach detection module comprises a capacitance acquisition unit, the capacitance acquisition unit is electrically connected with the conducting layer, and the approach detection module detects whether a user approaches the electronic equipment or not through the conducting layer.

In the embodiment of the invention, the circuit board of the target function module is grounded through the cable, the conducting layer laid on at least part of the surface of the circuit board is disconnected with the ground, the capacitance acquisition unit of the proximity detection module is electrically connected with the conducting layer, and the proximity detection module detects whether a user approaches the electronic equipment through the conducting layer, so that a ground signal required by the work of the circuit board can be ensured, and the conducting layer of the circuit board can be used as a detection antenna of the proximity detection module, so that the proximity detection module does not need to be provided with a separate detection antenna, and the space occupied by the proximity detection module can be reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 is a block diagram of an electronic device according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present 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.

As shown in fig. 1, an embodiment of the present invention provides an electronic device, including:

the target function module comprises a circuit board 1, wherein a conducting layer 11 is laid on at least part of the surface of the circuit board 1, the conducting layer 11 is disconnected with the ground, and the circuit board 1 is grounded through a cable 12;

the approach detection module comprises a capacitance acquisition unit, the capacitance acquisition unit is electrically connected with the conductive layer 11, and the approach detection module detects whether a user approaches the electronic device through the conductive layer 11.

In the embodiment of the present invention, the electronic device may include, but is not limited to: mobile phones, Tablet personal computers (Tablet personal computers), Laptop computers (Laptop computers), Personal Digital Assistants (PDAs), Mobile Internet Devices (MIDs), Wearable devices (Wearable devices), and the like.

The electronic device may include a plurality of function modules, and the target function module may be one of the plurality of function modules of the electronic device, for example, a camera module or a player module.

The Circuit board 1 may be various types of Circuit boards such as a rigid Circuit board, a Flexible Printed Circuit (FPC for short), or a rigid-flex Circuit.

The conductive layer 11 may be a metal layer, such as a silver layer; or may be a non-metallic conductive layer such as a silicon layer. In practical applications, in order to ensure better conductivity and lower cost, a copper layer can be adopted.

The disconnection of the conductive layer 11 from the ground may be a disconnection of the conductive layer 11 from the reference ground, that is, the conductive layer 11 is not grounded. The cable 12 may be a cable or a printed circuit.

The proximity detection module detects whether a user is in proximity to the electronic device through the conductive layer 11, which means that the conductive layer 11 can be used as a detection antenna of the proximity detection module to detect whether the user is in proximity to the electronic device. The capacitance collecting unit may be configured to collect a value of an induced capacitance between the conductive layer 11 and a user.

In the embodiment of the invention, the circuit board of the target function module is grounded through the cable, the conducting layer laid on at least part of the surface of the circuit board is disconnected with the ground, the capacitance acquisition unit of the proximity detection module is electrically connected with the conducting layer, and the proximity detection module detects whether a user approaches the electronic equipment through the conducting layer, so that a ground signal required by the work of the circuit board can be ensured, and the conducting layer of the circuit board can be used as a detection antenna of the proximity detection module, so that the proximity detection module does not need to be provided with an independent detection antenna, the space occupied by the proximity detection module can be reduced, the material cost can be reduced, and the reuse rate is improved.

Optionally, the target function module is a key module or a fingerprint module.

In the embodiment of the present invention, the key module may be a physical key module or a virtual key module. Above-mentioned fingerprint module can be all kinds of fingerprint modules such as optical fingerprint module, semiconductor fingerprint module or radio frequency fingerprint module.

The target function module is a key module or a fingerprint module, so that the realization difficulty and complexity of the embodiment of the invention can be reduced.

Optionally, the target function module is a key module;

the key module comprises a physical key 2, an electric contact is arranged on the circuit board 1, and the electric contact is grounded through the cable 12;

wherein, under the condition that the physical key 2 is in a non-pressed state, the physical key 2 and the electric contact are arranged at intervals; and under the condition that the physical key 2 is in a pressed state, the physical key 2 is in contact conduction with the electric contact to trigger the key function.

In the embodiment of the present invention, the electrical contact may be made of a conductive material, and specifically, the electrical contact may be made of a metal material or a non-metal conductive material. The above-described trigger key function may be understood as a function of a key.

The physical keys 2 may be conductive keys or non-conductive keys, for example, plastic keys.

The physical keys 2 may be located at any position of the electronic device, for example, the physical keys 2 may be located on a side surface, a front surface or a rear surface of the electronic device. In practical application, in consideration of usability, the interval between the circuit board 1 of the key module and the physical key 2 is not set to be large, so that when the physical key 2 is positioned on the side surface of the electronic equipment, the detection sensitivity of the proximity detection module on the side surface of the electronic equipment can be improved; similarly, when the physical key 2 is located on the front surface of the electronic device, the detection sensitivity of the proximity detection module in front of the electronic device can be improved; when the physical key 2 is located on the rear surface of the electronic device, the detection sensitivity of the proximity detection module on the rear surface of the electronic device can be improved.

The conductive layer 11 may be laid on a surface of the circuit board 1 facing the physical keys 2.

Because the circuit board of the key module is provided with the electric contact which is grounded through the cable, the physical key and the electric contact are arranged at intervals under the condition that the physical key is in a non-pressed state; under the condition that the physical key is in a pressed state, the physical key is in contact conduction with the electric contact to trigger the key function, so that normal use of the key can be guaranteed, a conducting layer of a circuit board of the key module can be used as a detection antenna close to the detection module, the space occupied by the close detection module can be reduced, material cost is reduced, and the reuse rate is improved.

Optionally, the physical key 2 is arranged opposite to the electrical contact.

Because the physical key and the electric contact are arranged oppositely, the reliability is better when the physical key is contacted with the electric contact.

Optionally, the physical key 2 has conductivity, and the physical key 2 is electrically connected to the conductive layer 11.

In the embodiment of the present invention, the physical key 2 may be made of metal or non-metal conductive material.

The physical key has conductivity and is electrically connected with the conductive layer, so that the physical key can also be used as a part of the detection antenna of the proximity detection module, namely, the circuit board of the key module and the physical key are jointly used as the detection antenna of the proximity detection module, thus the area of the detection antenna of the proximity detection module can be increased, and the detection distance supported by the proximity detection module can be further increased.

Optionally, the physical key 2 is a metal key.

The physical key is a metal key, so that the durability of the physical key can be further improved.

Optionally, the number of the physical keys 2 and the number of the electrical contacts are multiple, and the physical keys 2 and the electrical contacts are arranged in a one-to-one correspondence manner.

In the embodiment of the present invention, the one-to-one correspondence between the physical key 2 and the plurality of electrical contacts may be understood as follows: each physical key 2 corresponds to one electrical contact, each physical key 2 is arranged at intervals with all the electrical contacts when not pressed, and each physical key 2 is in contact conduction with the corresponding electrical contact when pressed to trigger the corresponding key function.

The cable 12 may include a plurality of sub-cables corresponding to the plurality of electrical contacts one to one, in which case each electrical contact may be grounded via a corresponding sub-cable.

Because the quantity of physical button and electric contact is a plurality of to can make the function of button module abundanter.

Optionally, the number of the physical keys 2 and the number of the electrical contacts are three, and three physical keys 2 include: a volume up key 21, a volume down key 22, and an on-off key 23.

Optionally, the fingerprint module is capacitanc fingerprint module.

The fingerprint module is a capacitive fingerprint module, so that the implementation difficulty and complexity of the embodiment of the invention can be further reduced.

Optionally, the electronic device further includes a processing module, and the processing module is electrically connected to the capacitance collecting unit;

the processing module is used for judging whether a user approaches the electronic equipment or not according to the capacitance value acquired by the capacitance acquisition unit, and controlling the transmitting power of the antenna of the electronic equipment to be smaller than a preset threshold under the condition that the user is judged to approach the electronic equipment.

In the embodiment of the invention, the processing module can adopt an independent chip or a mainboard of the electronic equipment directly, and when the mainboard is adopted as the processing module, the processing module does not need to be arranged independently, so that the required assembly space can be further saved, and the light and thin processing of the electronic equipment is facilitated.

The above determining whether the user is close to the electronic device according to the capacitance value acquired by the capacitance acquisition unit may specifically be: and under the condition that the capacitance value acquired by the capacitance acquisition unit is greater than or equal to a preset capacitance value, determining that the user is close to the electronic equipment, and under the condition that the capacitance value acquired by the capacitance acquisition unit is less than the preset capacitance value, determining that the user is not close to the electronic equipment.

The electronic equipment further comprises a processing module, the processing module is electrically connected with the capacitance acquisition unit and used for judging whether a user approaches the electronic equipment or not according to the capacitance value acquired by the capacitance acquisition unit, and controlling the transmitting power of the antenna of the electronic equipment to be smaller than a preset threshold value under the condition that the user approaches the electronic equipment, so that the SAR value can be reduced under the condition that the user approaches the electronic equipment, and the health influence of electromagnetic radiation on the user can be further reduced.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (10)

1. An electronic device, comprising:

the target function module comprises a circuit board, at least part of the surface of the circuit board is paved with a conductive layer, the conductive layer is disconnected with the ground, and the circuit board is grounded through a cable;

the approach detection module comprises a capacitance acquisition unit, the capacitance acquisition unit is electrically connected with the conducting layer, and the approach detection module detects whether a user approaches the electronic equipment or not through the conducting layer.

2. The electronic device of claim 1, wherein the target function module is a key module or a fingerprint module.

3. The electronic device of claim 2, wherein the target function module is a key module;

the key module comprises a physical key, an electric contact is arranged on the circuit board, and the electric contact is grounded through the cable;

wherein the physical key is spaced from the electrical contact when the physical key is in a non-depressed state; and under the condition that the physical key is in a pressed state, the physical key is in contact conduction with the electric contact to trigger the key function.

4. The electronic device of claim 3, wherein the physical key is electrically conductive and the physical key is electrically connected to the conductive layer.

5. The electronic device of claim 4, wherein the physical key is a metal key.

6. The electronic device of claim 3, wherein the physical key is disposed opposite the electrical contact.

7. The electronic device according to any one of claims 3 to 6, wherein the number of the physical keys and the number of the electrical contacts are both multiple, and the multiple physical keys and the multiple electrical contacts are arranged in one-to-one correspondence.

8. The electronic device of claim 7, wherein the number of physical keys and the number of electrical contacts are three, three of the physical keys comprising: a volume up key, a volume down key and an on-off key.

9. The electronic device of claim 2, wherein the fingerprint module is a capacitive fingerprint module.

10. The electronic device of claim 1, further comprising a processing module electrically connected to the capacitance collection unit;

the processing module is used for judging whether a user approaches the electronic equipment or not according to the capacitance value acquired by the capacitance acquisition unit, and controlling the transmitting power of the antenna of the electronic equipment to be smaller than a preset threshold under the condition that the user is judged to approach the electronic equipment.

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