CN111491051B - Mobile terminal - Google Patents
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- CN111491051B CN111491051B CN202010320823.8A CN202010320823A CN111491051B CN 111491051 B CN111491051 B CN 111491051B CN 202010320823 A CN202010320823 A CN 202010320823A CN 111491051 B CN111491051 B CN 111491051B
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- mobile terminal
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- radiation detection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
- H04M1/026—Details of the structure or mounting of specific components
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/3827—Portable transceivers
- H04B1/3833—Hand-held transceivers
- H04B1/3838—Arrangements for reducing RF exposure to the user, e.g. by changing the shape of the transceiver while in use
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
- H04M1/724—User interfaces specially adapted for cordless or mobile telephones
- H04M1/72448—User interfaces specially adapted for cordless or mobile telephones with means for adapting the functionality of the device according to specific conditions
Abstract
The application provides a mobile terminal, including: a housing; an antenna comprising at least one radiation detection body disposed on the housing; at least one auxiliary detection body arranged in the shell and close to the radiation detection body; the capacitive proximity sensor is arranged in the shell and is electrically connected with the radiation detection body and the auxiliary detection body and used for detecting a first capacitance value of the radiation detection body and the main body to be detected and detecting a second capacitance value of the auxiliary detection body and the main body to be detected; and the controller is used for acquiring a distance value between the radiation detection body and the main body to be detected according to the first capacitance value and the second capacitance value and adjusting the transmitting power of the antenna according to the distance value. The mobile terminal provided by the application can improve the detection sensitivity of the capacitive proximity sensor.
Description
Technical Field
The application relates to the technical field of electronics, in particular to a mobile terminal.
Background
With the development of mobile communication, handheld mobile terminals are closer to the lives of people, the frequency of using mobile terminals by people is continuously improved, and the service time is also prolonged, for example, mobile phones, tablets and the like. SAR (Specific Absorption Rate), which is the ratio of the electromagnetic wave energy Absorption of a mobile phone or a wireless product, is defined as: under the action of external electromagnetic field, induced electromagnetic field is generated in human body, and the "SAR" value is used in international scientific community to quantify and measure the radiation of mobile phone. The SAR sensor is a capacitance type proximity sensor, whether the distance between a mobile terminal and a human body meets the condition that the SAR value is adjusted by an antenna is detected by detecting the capacitance value change between the mobile terminal and the human body, and when the condition is met, the antenna reduces the transmitting power so as to reduce the influence on the human body, so that the detection sensitivity of the capacitance type proximity sensor is an extremely important parameter. How to improve the detection sensitivity of the capacitive proximity sensor becomes a technical problem to be solved.
Disclosure of Invention
The present application provides a mobile terminal capable of improving detection sensitivity of a capacitive proximity sensor.
The application provides a mobile terminal, including:
a housing;
an antenna comprising at least one radiation detection body disposed on the housing;
at least one auxiliary detection body arranged in the shell and close to the radiation detection body;
the capacitive proximity sensor is arranged in the shell and is electrically connected with the radiation detection body and the auxiliary detection body and used for detecting a first capacitance value of the radiation detection body and the main body to be detected and detecting a second capacitance value of the auxiliary detection body and the main body to be detected; and
and the controller is used for acquiring a distance value between the radiation detection body and the main body to be detected according to the first capacitance value and the second capacitance value and adjusting the transmitting power of the antenna according to the distance value.
The embodiment of the application provides a mobile terminal, through addding the auxiliary detection body, the radiation detection body all with capacitanc proximity sensor between form electric capacity detection channel, thereby mobile terminal has two detection channel, when can avoiding single detection channel effectively, the interference factor that the response area of radiation detection body is little or the radiation detection body receives influences the problem that great and lead to capacitanc proximity sensor's detectivity low, the detectivity of capacitanc proximity sensor has been improved, and then mobile terminal's security performance has been promoted.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a mobile terminal according to an embodiment of the present application;
fig. 2 is a schematic structural split view of a mobile terminal provided in fig. 1;
fig. 3 is a schematic partial structure diagram of a mobile terminal according to an embodiment of the present application;
fig. 4 is a graph of antenna power back-off versus distance according to an embodiment of the present disclosure;
fig. 5 is a schematic partial structure diagram of a mobile terminal according to a second embodiment of the present application;
fig. 6 is a schematic partial structure diagram of a mobile terminal according to a third embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. The embodiments listed in the present application may be appropriately combined with each other.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a mobile terminal according to an embodiment of the present disclosure. The mobile terminal 100 may be a device capable of transceiving electromagnetic wave signals, such as a phone, a television, a tablet computer, a mobile phone, a camera, a personal computer, a notebook computer, an in-vehicle device, an earphone, a watch, a wearable device, a base station, an in-vehicle radar, a Customer Premise Equipment (CPE), and the like. Taking the mobile terminal 100 as a mobile phone as an example, for convenience of description, the mobile terminal 100 is defined with reference to a first view angle, a width direction of the mobile terminal 100 is defined as an X-axis direction, a length direction of the mobile terminal 100 is defined as a Y-axis direction, and a thickness direction of the mobile terminal 100 is defined as a Z-axis direction. The direction indicated by the arrow is the forward direction.
It should be noted that, in the embodiments of the present application, the same reference numerals denote the same components, and in different embodiments, detailed descriptions of the same components are omitted for the sake of brevity. It is to be understood that the thickness, length, width, and other dimensions of the various components in the embodiments of the present application shown in the drawings are merely illustrative and should not be construed as limiting the present application in any way.
Referring to fig. 2, fig. 2 is a schematic diagram illustrating a structure of a mobile terminal 100 according to an embodiment of the present disclosure.
In this embodiment, referring to fig. 2, the mobile terminal 100 at least includes a display screen 10 and a housing 50 fixedly connected in sequence. The housing 50 includes a middle frame 20 and a battery cover 30. The display screen 10, the middle frame 20 and the battery cover 30 surround to form a containing space. It is understood that the middle frame 20 and the battery cover 30 may be integrally formed. The mobile terminal 100 further includes a battery 201, a main board 202, a small board 203, a camera 204, a microphone, a receiver, a speaker, a face recognition module, a fingerprint recognition module, and other components, which are disposed in the accommodating space and can implement the basic functions of the mobile phone, and are not listed in this embodiment.
Referring to fig. 3, the mobile terminal 100 further includes an antenna 40. In this embodiment, the antenna 40 is an antenna module. The antenna 40 at least comprises a radio frequency transceiver chip 41, at least one matching circuit 42, at least one feeding portion 43 and at least one radiating body 44. In the present embodiment, the number of matching circuits 42, the number of feeding portions 43, and the number of radiating bodies 44 are all equal and are all plural. Of the plurality of radiation bodies 44, at least one radiation body 44 serves as a radiation detection body.
In this embodiment, referring to fig. 3, the rf transceiver chip 41 is disposed on the motherboard 202 and/or the small board 203. The housing 50 includes a middle frame 20 and a battery cover 30. In this embodiment, the radiation body 44 is disposed on the middle frame 20 for illustration, and the description thereof is omitted.
Optionally, the material of the middle frame 20 includes, but is not limited to, metal, plastic, ceramic, etc. The radiating body 44 has a better electrical conductivity. The material of the radiation body 44 includes, but is not limited to, metal, conductive plastic, conductive oxide, conductive polymer, etc. In this embodiment, the middle frame 20 is made of metal, and the radiation body 44 is integrated with the middle frame 20. In other words, the middle frame 20 is composed of a plurality of metal segments insulated from each other. And the two adjacent metal sections are filled with an insulating material so as to be mutually insulated. The length of each metal segment is not specifically limited, and the length of the metal segment can be designed according to the frequency of the received and transmitted frequency band. Each metal segment is a radiating body 44.
Optionally, referring to fig. 3, the matching circuit 42 and the feeding portion 43 are both disposed on the main board 202, and the feeding portion 43 contacts and is electrically connected to the radiation body 44. Alternatively, the feeding portion 43 may be a conductive elastic sheet, and the feeding portion 43 is elastically abutted and electrically connected to the radiation body 44. Optionally, the feeding portion 43 may also be a conductive protrusion, a groove engaged with the conductive protrusion is formed on the radiation body 44, and the feeding portion 43 and the radiation body 44 are tightly connected by engaging the conductive protrusion in the groove of the radiation body 44. Alternatively, the feeding portion 43 may also be soldered to the radiating body 44 by a coaxial line. In this embodiment, the feeding unit 43 may be welded to the radiating body 44 by a coaxial line.
In this embodiment, the matching circuit 42 is electrically connected between the rf transceiver chip 41 and the feeding portion 43. The matching circuit 42 is composed of a capacitor and/or an inductor, and the impedance of the radiation body 44 can be adjusted by designing the structure of the matching circuit 42, so that the radiation body 44 can receive and transmit electromagnetic wave signals of a preset frequency band.
It can be understood that the electromagnetic wave signals radiated by the radiation body 44 include, but are not limited to, millimeter wave signals, sub-millimeter wave signals, terahertz signals, WIFI signals of 2.4GHz and 5.0GHz, GSM signals of several frequency bands such as 900MHz, 1800MHz and 1900MHz, GPS signals, bluetooth signals, and the like. The present embodiment is described by taking an example in which the radiation body 44 radiates a millimeter wave signal.
It will be appreciated that each radiating body 44 is also electrically connected to a reference ground on the main board 202.
In this embodiment, referring to fig. 3, the mobile terminal 100 further includes at least one capacitive proximity sensor 60, at least one auxiliary detection body 70, and a controller 80.
It will be appreciated that referring to fig. 3, the capacitive proximity sensor 60 described herein is a SAR sensor. At least one capacitive proximity sensor 60 is disposed within the housing 50 and on the motherboard 202. The controller 80 may be an integrated chip. The radio frequency transceiver chip 41 and the at least one capacitive proximity sensor 60 are both electrically connected to the controller 80. Each of the capacitive proximity sensors 60 is electrically connected to one of the radiation detecting bodies 441 to detect a distance value between the radiation detecting body 441 and a subject to be detected (e.g., a human body) through the radiation detecting body 441. In the present application, the radiation body 44 is used as the radiation detection body 441 of the capacitive proximity sensor 60, so that the radiation body 44 can be reused, the number of components of the mobile terminal 100 can be reduced, the cost can be reduced, and the space of the mobile terminal 100 can be saved.
It is understood that the number of capacitive proximity sensors 60 may be one, with one capacitive proximity sensor 60 electrically connected to one radiation detecting body 441. Of course, the number of the capacitive proximity sensors 60 may be multiple, each capacitive proximity sensor 60 may be electrically connected to one radiation detection body 441, or at least two capacitive proximity sensors 60 may be electrically connected to the same radiation detection body 441. The present embodiment is described by taking an example in which one capacitive proximity sensor 60 is electrically connected to one radiation detection body 441. It can be understood that the radiation detection body 441 may be disposed near the display screen 10 at the top or both sides of the mobile terminal 100, so that the radiation detection body 441 can more accurately detect the capacitance between the human body and the radiation detection body 441 during the process that the mobile terminal 100 approaches the human body.
In this embodiment, at least one auxiliary detecting body 70 is disposed inside the housing 50 and close to the radiation detecting body 441. The present embodiment will be described by taking an example in which one auxiliary detecting body 70 is provided near the radiation detecting body 441. As can be appreciated, it is possible to,
in this embodiment, the capacitive proximity sensor 60 is electrically connected to the radiation detection body 441 and the auxiliary detection body 70, and is configured to detect a first capacitance value of the radiation detection body 441 and the main body to be detected and detect a second capacitance value of the auxiliary detection body 70 and the main body to be detected. Specifically, the radiation detecting body 441 and the auxiliary detecting body 70 are made of conductive materials.
Optionally, the material of the radiation detecting body 441 is the same as that of the auxiliary detecting body 70. Further, the radiation detecting body 441 and the auxiliary detecting body 70 are made of metal.
In this embodiment, the capacitive proximity sensor 60 sends the detected first capacitance value and the detected second capacitance value to the controller 80 in real time, and the controller 80 is configured to obtain a distance value between the radiation detection body 441 and the to-be-detected body according to the first capacitance value and the second capacitance value, and adjust the transmission power of the antenna 40 according to the distance value. Specifically, the controller 80 synthesizes a third capacitance value according to the first capacitance value and the second capacitance value, and calculates the distance between the radiation detection body 441 and the main body to be detected (for example, a human body) according to the third capacitance value, so as to monitor that when the distance between the main body to be detected and the radiation detection body 441 is smaller than a distance threshold, the transmitting power of the radio frequency transceiver chip 41 is controlled to be reduced, thereby reducing the absorption rate of electromagnetic waves radiated by the antenna 40 by the human body, reducing the radiation risk of the mobile terminal 100, and improving the safety performance of the mobile terminal 100. Wherein, the distance threshold value can be 10 mm-12 mm.
The embodiment of the application provides a mobile terminal 100, through addding auxiliary detection body 70, radiation detection body 441 all forms the electric capacity detection passageway with between the capacitanc proximity sensor 60, thereby mobile terminal 100 has two detection passageways, when can avoiding single detection passageway effectively, the problem that the response area of radiation detection body 441 is little or the interference factor that radiation detection body 441 received influences greatly and leads to the detectivity of capacitanc proximity sensor 60 to be low, the detectivity of capacitanc proximity sensor 60 has been improved, and then mobile terminal 100's security performance has been promoted.
The structure and position of the auxiliary detecting body 70 will be specifically exemplified below with reference to the accompanying drawings.
Referring to fig. 3, the auxiliary detection body 70 is disposed on the main board 202 of the mobile terminal 100; alternatively, the auxiliary detecting body 70 is located between the main board 202 and the middle frame 20. In the present embodiment, the auxiliary detecting body 70 is disposed on the main board 202 for example. The main board 202 of the mobile terminal 100 is located on an X-Y plane, the main board 202 has a larger bearing area on the X-Y plane, and the area of the auxiliary detection body 70 that can be disposed on the main board 202 is larger.
Further, the sensing area of the auxiliary detecting body 70 is larger than or equal to the sensing area of the radiation detecting body 441.
When the radiation detection body 441 is a radiator that radiates millimeter wave signals, the physical area of the radiation detection body 441 is too small, which results in too small an area of a plate constituting a detection capacitor, and thus the detection accuracy of the capacitive proximity sensor 60 cannot be satisfied. Generally, it is assumed that the international certification standard requires that the transmission power of the antenna 40 starts to decrease at about 10mm, but when the area of the detection capacitor of the radiation detection body 441 is too small, the radiation detection body 441 can only sense a human body within 0-5 mm of radius, and cannot sense the approach of the human body at about 10mm, so that the transmission power of the antenna 40 is not decreased when the human body approaches the radiation main body by about 10mm, which results in a large radiation damage to the human body.
By arranging the auxiliary detection body 70 and setting the sensing area of the radiation detection body 441 to be larger than or equal to that of the radiation detection body 441, the problem that the radiation detection body 441 cannot effectively adjust the transmitting power of the antenna 40 when the area is too small to be about 10mm is solved.
Further, when the radiation detection body 441 can only sense a human body within a radius of 0-5 mm, the capacitive proximity sensor 60 can detect a human body within a range of 0-12 mm by providing the auxiliary detection body 70 in this embodiment, and the requirement of the antenna 40 that the trigger distance for reducing the SAR value is 10mm can be completely satisfied.
Specifically, the auxiliary detecting body 70 is disposed toward or away from the display screen 10. In this embodiment, the radiation detection body 441 is disposed toward the display screen 10, and when a human body approaches the display screen 10 of the mobile terminal 100, the auxiliary detection body 70 is opposite to the human body, so as to improve the detection accuracy of the capacitive proximity sensor 60 through the auxiliary detection body 70.
It can be understood that the auxiliary detecting body 70 is spaced apart from the radiation detecting body 441, wherein the distance between the auxiliary detecting body 70 and the radiation detecting body 441 may be 1mm to 5 mm.
In this embodiment, the radiation detecting body 441 is a metal segment that is disposed at a corner of the housing 50 and bent, so that the radiation detecting body 441 has a larger capacitance detecting area toward both the X-axis direction and the Y-axis direction. The auxiliary detecting body 70 is disposed close to the corner of the housing 50 on which the radiation detecting body 441 is disposed, so that the auxiliary detecting body 70 is close to the radiation detecting body 441. In addition, the auxiliary detection body 70 has a larger capacitance detection area in the Z-axis direction, and the auxiliary detection body 70 and the radiation detection body 441 simultaneously act to form capacitance with a human body in each direction, so that the coverage directivity is wider, and the detection accuracy is higher.
Alternatively, the auxiliary detecting body 70 may be disposed opposite to at least a portion of the radiation detecting body 441. In other words, the auxiliary detecting body 70 can be disposed in the Z-X plane or the Y-Z plane, or the auxiliary detecting body 70 is a bent section identical to the radiation detecting body 441, so that the capacitance between the human body and the capacitive proximity sensor 60 detected by the auxiliary detecting body 70 is closer to the capacitance between the radiation detecting body 441 and the human body.
The double-channel detection scheme provided by the embodiment of the application ensures that the auxiliary detection body 70 and the radiation detection body 441 can work simultaneously by arranging the independent pin of the auxiliary detection body 70 which is independently connected with the capacitive proximity sensor 60. In operation, the capacitive proximity sensor 60 may demodulate a first capacitance value (C1) detected by the radiation detecting body 441 and a second capacitance value (C2) detected by the auxiliary detecting body 70, respectively. The capacitive proximity sensor 60 sends the first capacitance value (C1) and the second capacitance value (C2) to the controller 80, and the controller 80 may synthesize an overall capacitance (C3) by an internal algorithm. Wherein, C3 can be the average value of C1 and C2. Alternatively, C3 is determined from the area ratio of the radiation detecting body and the auxiliary detecting body. For example, the area ratio of the radiation detecting body and the auxiliary detecting body is 0.1: 0.9, C3 may take 0.1 × C1+0.9 × C2.
The controller 80 obtains the distance between the human body and the radiation detecting body 441 according to the detected overall capacitance (C3), and adjusts the transmitting power of the antenna 40 according to a preset curve. Specifically, a reference curve for adjusting the transmission power of the antenna 40 according to the distance between the human body and the radiation detecting body 441 is shown in fig. 4.
When the distance range of the radiation detection body 441 for detecting a human body is 0-5 mm, the detection distance range after the auxiliary detection body 70 is arranged can be expanded to 0-12 mm (12 mm is not limited, and 11mm, 14mm, 15mm and the like can be also arranged), and the trigger distance for reducing the SAR is 10mm, so that the detectable distance range of the detection electrode of the capacitive proximity sensor 60 can be increased after the auxiliary detection body 70 is arranged, and the trigger distance requirement for reducing the SAR is met.
In practical application, the controller 80 determines the current detection distance according to the integral capacitance (C3) detected by the capacitive proximity sensor 60, so that the mobile terminal 100 can be ensured to normally reduce SAR triggering when the distance from the human body to the radiation detection body 441 is 10mm, and the authentication requirement is met; when the human body continues to approach, and when the distance from the human body to the radiation detection body 441 is 5mm, the capacitive proximity sensor 60 only meets the requirement of detection accuracy of 5mm through the detection distance corresponding to the first capacitance value (C1) detected by the radiation detection body 441, the controller 80 controls the radiation detection body 441 to be in a normal working state and the auxiliary detection body 70 to be in a stop working state, so that the power excess reduction caused by the approach of the human body to the auxiliary detection body 70 but not to the radiation detection body 441 at a close distance is avoided, the user experience is not affected, and the radio frequency performance of the mobile terminal 100 is improved.
Referring to fig. 3, the mobile terminal 100 further includes a first detection channel 1 and the second detection channel 2. The first detection channel 1 electrically connects the capacitive proximity sensor 60 and the radiation detection body 441. The second detection channel 2 electrically connects the capacitive proximity sensor 60 and the auxiliary detection body 70.
The first detection channel 1 and the second detection channel 2 are both conductive lines. The first detection channel 1 and the second detection channel 2 are both disposed on the main board 202. The first detection channel 1 and the second detection channel 2 are arranged in parallel and are close to each other, so that the environments where the first detection channel 1 and the second detection channel 2 are located are the same, therefore, the situation that the capacitance value of the first detection channel 1 and the capacitance value of the second detection channel 2 are not accurately detected due to different environmental errors is avoided, new error influence is introduced, and the accuracy of the capacitive proximity sensor 60 in detecting the distance between the radiation detection body 441 and a main body to be detected can be improved.
It can be understood that the distance between the first detection channel 1 and the second detection channel 2 is 1mm to 5mm, so that the environments where the first detection channel 1 and the second detection channel 2 are located are the same, the inaccuracy of capacitance value detection caused by different environmental errors of the first detection channel 1 and the second detection channel 2 is reduced, and the accuracy of the capacitive proximity sensor 60 in detecting the distance between the radiation detection body 441 and the main body to be detected is improved.
Further, the length of the first detection channel 1 is equal to the length of the second detection channel 2, so that the influence of the capacitance value detected by the first detection channel 1 corresponding to the radiation detection body 441 is the same as the influence of the capacitance value detected by the second detection channel 2 corresponding to the radiation detection body 441, thereby improving the accuracy of the capacitive proximity sensor 60 in detecting the distance between the radiation detection body 441 and the main body to be detected.
In the embodiment, the auxiliary detection body 70 is separately connected with the independent pin of the capacitive proximity sensor 60, so that the auxiliary detection body 70 and the radiation detection body 441 can work at the same time to form a double detection channel, the controller 80 controls the double detection channels to work at a relatively long distance (5 mm-12 mm), and the distance value which can be detected when the double detection channels work at the same time meets the requirement of reducing the triggering distance of the SAR by authentication; meanwhile, at a short distance (0-5 mm), the controller 80 only controls the radiation detection body 441 to work, so that the short distance cannot cause excessive power reduction due to the existence of the auxiliary detection body 70, and user experience is not affected.
Referring to fig. 5, in a mobile terminal 100 provided in the second embodiment of the present application, the structure of the mobile terminal 100 provided in the second embodiment is substantially the same as that of the mobile terminal 100 provided in the first embodiment, and a main difference is that the mobile terminal 100 provided in the second embodiment does not include the first detection channel 1 and the second detection channel 2. The mobile terminal 100 provided in this embodiment includes a third detection channel 3 and a duplexer 4. The first port 401 of the duplexer 4 is electrically connected to the capacitive proximity sensor 60 through the third detection channel 3. The second port 402 of the duplexer 4 is electrically connected to the controller 80. The third port 403 of the duplexer 4 is electrically connected to the radiation detecting body 441. The fourth port 404 of the duplexer 4 is electrically connected to the auxiliary detecting body 70. The duplexer 4 is used to separate the detection signal of the radiation detecting body 441 from the detection signal of the auxiliary detecting body 70.
The capacitive proximity sensor 60 operates on low frequency alternating current, optionally 100 KHz. The capacitive proximity sensor 60 may be configured to operate at currents f1 and f2, with the third port 403 and the fourth port 404 of the duplexer 4 corresponding to f1 and f2, respectively. The radiation detection body 441 and the auxiliary detection body 70 of the capacitive proximity sensor 60 are connected to the f1 and f2 ports of the duplexer 4, respectively. Due to the different operating frequencies of the radiation detecting body 441 and the auxiliary detecting body 70, the capacitive proximity sensor 60 can demodulate the capacitance value detected by the radiation detecting body 441 (C1) and the capacitance value detected by the auxiliary detecting body 70 (C2), respectively. The capacitive proximity sensor 60 sends the first capacitance value (C1) and the second capacitance value (C2) to the controller 80, and the controller 80 may synthesize an overall capacitance (C3) by an internal algorithm.
By adding the duplexer 4 between the auxiliary detection body 70 and the radiation detection body 441, the duplexer 4 makes the working frequencies of the radiation detection body 441 and the auxiliary detection body 70 different, so that the capacitive proximity sensor 60 can demodulate the capacitance value (C1) detected by the radiation detection body 441 and the capacitance value (C2) detected by the auxiliary detection body 70 respectively, compared with the first embodiment, only one detection channel and the duplexer 4 are needed to be arranged without arranging two detection channels, and the capacitive proximity sensor 60 can detect the capacitance value (C1) detected by the radiation detection body 441 and the capacitance value (C2) detected by the auxiliary detection body 70; in addition, the controller 80 controls the double detection channels to work at a relatively long distance (5 mm-12 mm), and the distance value which can be detected when the double detection channels work simultaneously meets the requirement of reducing the SAR trigger distance by certification; meanwhile, at a short distance (0-5 mm), the controller 80 only controls the radiation detection body 441 to work, so that the short distance cannot cause excessive power reduction due to the existence of the auxiliary detection body 70, and user experience is not affected.
Referring to fig. 6, a mobile terminal 100 provided in the third embodiment of the present application has substantially the same structure as the mobile terminal 100 provided in the first embodiment, and the main difference is that the mobile terminal 100 further includes a switch 5. One end of the switch 5 is electrically connected to the capacitive proximity sensor 60 and to the controller 80. The other end of the duplexer 4 is electrically connected to the radiation detecting body 441 and the auxiliary detecting body 70. When the distance value obtained by the controller 80 is greater than a preset threshold, the controller 80 controls the switch 5 to switch the radiation detection body 441 and the auxiliary detection body 70 to be both in conduction with the capacitive proximity sensor 60. When the distance value obtained by the controller 80 is smaller than or equal to the preset threshold, the controller 80 controls the switch 5 to switch the radiation detection body 441 to be connected with the capacitive proximity sensor 60, and the preset threshold is 1mm to 5 mm.
Specifically, the change-over switch 5 can be a single-pole single-throw switch, and the change-over switch 5 is connected in series to a path between the capacitive proximity sensor 60 and the auxiliary detection body 70, and is used for controlling whether the auxiliary detection body 70 works or not; alternatively, the switch 5 may be a single-pole double-throw switch for connecting the capacitive proximity sensor 60, the auxiliary detection body 70 and the radiation detection body 441 and controlling switching between the auxiliary detection body 70 and the radiation detection body 441.
The controller 80 is electrically connected to a control pin of the switch 5 to control the operating state of the switch.
By adding the change-over switch 5 between the auxiliary detection body 70 and the radiation detection body 441, the controller 80 can control the auxiliary detection body 70 and the radiation detection body 441 to work at a relatively long distance (5 mm-12 mm), and the distance value which can be detected when the auxiliary detection body 70 and the radiation detection body 441 work simultaneously meets the requirement of reducing the SAR trigger distance by authentication; meanwhile, at a short distance (0-5 mm), the controller 80 only controls the radiation detection body 441 to work, so as to ensure that the short distance does not cause excessive power reduction due to the existence of the auxiliary detection body 70, and improve the communication reliability of the mobile terminal 100.
It is understood that the third embodiment can be combined with the second embodiment to obtain a new embodiment, and the protection scope of the present application is also included in the present application.
While the foregoing is directed to embodiments of the present application, it will be appreciated by those skilled in the art that various changes and modifications may be made without departing from the principles of the application, and it is intended that such changes and modifications be covered by the scope of the application.
Claims (11)
1. A mobile terminal, comprising:
a housing;
an antenna comprising at least one radiation detection body disposed on the housing;
at least one auxiliary detection body arranged in the shell and close to the radiation detection body;
the capacitive proximity sensor is arranged in the shell and is electrically connected with the radiation detection body and the auxiliary detection body and used for detecting a first capacitance value of the radiation detection body and the main body to be detected and detecting a second capacitance value of the auxiliary detection body and the main body to be detected;
the controller is used for acquiring a distance value between the radiation detection body and the main body to be detected according to the first capacitance value and the second capacitance value and adjusting the transmitting power of the antenna according to the distance value; and
the controller is used for controlling the switching switch to be switched into a state that the radiation detection body and the auxiliary detection body are both conducted with the capacitive proximity sensor; when the distance value acquired by the controller is smaller than or equal to the preset threshold value, the controller controls the change-over switch to be switched to be conducted between the radiation detection body and the capacitive proximity sensor.
2. The mobile terminal of claim 1, further comprising a first detection channel electrically connecting the capacitive proximity sensor and the radiation detection body and a second detection channel electrically connecting the capacitive proximity sensor and the auxiliary detection body.
3. The mobile terminal of claim 2, wherein the first detection channel and the second detection channel are arranged in parallel, and a length of the first detection channel and a length of the second detection channel are equal.
4. The mobile terminal according to claim 1, wherein the mobile terminal further comprises a third detection channel and a duplexer, the first port of the duplexer is electrically connected to the capacitive proximity sensor through the third detection channel, the second port of the duplexer is electrically connected to the controller, the third port of the duplexer is electrically connected to the radiation detection body, the fourth port of the duplexer is electrically connected to the auxiliary detection body, and the duplexer is configured to separate the detection signal of the radiation detection body from the detection signal of the auxiliary detection body.
5. The mobile terminal according to any of claims 1 to 4, wherein the preset threshold is 1mm to 5 mm.
6. The mobile terminal of claim 1, wherein the housing comprises a middle frame, the radiation detection body is disposed on or part of the middle frame, and the auxiliary detection body is disposed on a main board of the mobile terminal or between the main board and the middle frame.
7. The mobile terminal of claim 6, further comprising a display screen covered with the housing, wherein the auxiliary detection body is disposed toward or away from the display screen.
8. The mobile terminal of claim 1, wherein the auxiliary detection body is disposed opposite at least a portion of the radiation detection body.
9. The mobile terminal of claim 1, wherein a sensing area of the auxiliary detection body is greater than or equal to a sensing area of the radiation detection body.
10. The mobile terminal of claim 1, wherein the auxiliary detection body is made of the same material as the radiation detection body.
11. The mobile terminal according to claim 1, wherein the radiation detection body is a radiator that radiates a millimeter wave signal, a submillimeter wave signal, or a terahertz wave signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN112188646B (en) * | 2020-09-18 | 2023-08-25 | Oppo（重庆）智能科技有限公司 | Client terminal device |
| CN112615949B (en) * | 2020-12-14 | 2022-09-16 | Oppo（重庆）智能科技有限公司 | Proximity detection device, terminal, and communication method |
| CN115342720A (en) * | 2021-05-14 | 2022-11-15 | Oppo广东移动通信有限公司 | Electronic device |
| CN115343537A (en) * | 2021-05-14 | 2022-11-15 | Oppo广东移动通信有限公司 | SAR detection assembly, detection method and electronic equipment |
| CN115732897A (en) * | 2021-09-01 | 2023-03-03 | Oppo广东移动通信有限公司 | Electronic device and method for controlling SAR of electronic device |
| CN113890935B (en) * | 2021-09-28 | 2023-06-13 | Oppo广东移动通信有限公司 | Electronic equipment and method for adjusting antenna transmitting power |
| CN114243271A (en) * | 2021-12-15 | 2022-03-25 | 深圳市锐尔觅移动通信有限公司 | Antenna device, circuit board assembly and electronic equipment |
| CN114678683A (en) * | 2022-03-28 | 2022-06-28 | 深圳市锐尔觅移动通信有限公司 | Electronic device |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20150121832A (en) * | 2014-04-22 | 2015-10-30 | 삼성전자주식회사 | Antenna whth sensing function and electronic device having it |
| US9241050B1 (en) * | 2014-09-05 | 2016-01-19 | Google Technology Holdings LLC | Self-healing antenna system |
| CN105677120A (en) * | 2014-12-04 | 2016-06-15 | 商升特公司 | Multi-shield capacitive sensing circuit |
| CN205666332U (en) * | 2016-06-03 | 2016-10-26 | 合肥联宝信息技术有限公司 | Antenna, electronic equipment's frame and electronic equipment |
| CN107566577A (en) * | 2017-09-29 | 2018-01-09 | 努比亚技术有限公司 | Mobile terminal |
| CN109687110A (en) * | 2018-12-28 | 2019-04-26 | 维沃移动通信有限公司 | A kind of antenna structure and communication terminal |
| CN110708404A (en) * | 2018-07-09 | 2020-01-17 | 商升特公司 | Proximity sensor and mobile wireless device |
| CN110719348A (en) * | 2018-07-13 | 2020-01-21 | 商升特公司 | Intelligent proximity detector |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107548145A (en) * | 2017-06-27 | 2018-01-05 | 西安易朴通讯技术有限公司 | Antenna assembly, mobile terminal and antenna adjustment method |
-
2020
- 2020-04-21 CN CN202010320823.8A patent/CN111491051B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20150121832A (en) * | 2014-04-22 | 2015-10-30 | 삼성전자주식회사 | Antenna whth sensing function and electronic device having it |
| US9241050B1 (en) * | 2014-09-05 | 2016-01-19 | Google Technology Holdings LLC | Self-healing antenna system |
| CN105677120A (en) * | 2014-12-04 | 2016-06-15 | 商升特公司 | Multi-shield capacitive sensing circuit |
| CN205666332U (en) * | 2016-06-03 | 2016-10-26 | 合肥联宝信息技术有限公司 | Antenna, electronic equipment's frame and electronic equipment |
| CN107566577A (en) * | 2017-09-29 | 2018-01-09 | 努比亚技术有限公司 | Mobile terminal |
| CN110708404A (en) * | 2018-07-09 | 2020-01-17 | 商升特公司 | Proximity sensor and mobile wireless device |
| CN110719348A (en) * | 2018-07-13 | 2020-01-21 | 商升特公司 | Intelligent proximity detector |
| CN109687110A (en) * | 2018-12-28 | 2019-04-26 | 维沃移动通信有限公司 | A kind of antenna structure and communication terminal |
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