Calibration method and electronic equipment

Abstract

The present application provides a calibration method and electronic equipment, which relate to the field of communication technology. The electronic equipment includes: an antenna; an electromagnetic wave absorption ratio (SAR) sensor, the SAR sensor includes a first terminal and a second terminal, the first terminal is connected to the antenna; a scroll screen, the scroll screen includes a metal frame; wherein, when the scroll screen is in a folded state, the metal frame is connected to the second terminal; when the scroll screen is in an unfolded state, the metal frame is connected to the antenna, or the metal frame is connected to the second terminal.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a calibration method and electronic equipment. Background Art

[0002] With the global deployment of electronic devices, the antennas of electronic devices need to meet the regulatory standards of electromagnetic wave absorption ratio (Specific Absorption Rate, SAR) in various regions. After the antenna reduces SAR, the performance of the transmit / receive point (TRP) is greatly reduced, and the user experience becomes worse. In order to make up for the performance loss, according to the differences in user scenarios, a SAR sensor can be used to identify the current user scenario to determine whether to reduce SAR. Taking the body SAR as an example, a capacitive sensor is often used to determine whether the human body is close to implement a specific SAR reduction strategy.

[0003] The basic working principle of SAR sensor is that when the human body is close to the electronic device, a capacitance structure is formed between the human body and the antenna, and the capacitance changes according to the distance between the human body and the antenna. At present, SAR sensors are affected by temperature drift, resulting in large errors in SAR sensors, which in turn leads to poor ability of electronic devices to control antennas to reduce SAR. Summary of the invention

[0004] The embodiments of the present application provide a calibration method and an electronic device, which can solve the problem in the prior art that the electronic device has a poor ability to control the antenna to reduce SAR.

[0005] In a first aspect, an embodiment of the present application provides an electronic device, the electronic device comprising:

[0006] antenna;

[0007] An electromagnetic wave absorption ratio SAR sensor, the SAR sensor comprising a first terminal and a second terminal, the first terminal being connected to the antenna;

[0008] A scroll screen, wherein the scroll screen comprises a metal frame;

[0009] Wherein, when the scroll screen is in a folded state, the metal frame is connected to the second terminal;

[0010] When the scroll screen is in the unfolded state, the metal frame is connected to the antenna, or the metal frame is connected to the second terminal.

[0011] In a second aspect, an embodiment of the present application provides a calibration method, which is applied to the electronic device described in the first aspect, and the method includes:

[0012] Determining a differential compensation value corresponding to the SAR sensor based on the detection values ​​of the first wiring terminal and the second wiring terminal;

[0013] A threshold value of the SAR sensor is determined based on the differential compensation value, and the threshold value is used to determine whether to control the antenna to reduce the SAR when the antenna is not triggered to reduce the SAR.

[0014] In a third aspect, an embodiment of the present application provides an electronic device, which includes a processor and a memory, wherein the memory stores programs or instructions that can be run on the processor, and when the program or instructions are executed by the processor, the steps in the method described in the first aspect are implemented.

[0015] In a fourth aspect, an embodiment of the present application provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps in the method described in the first aspect are implemented.

[0016] In a fifth aspect, an embodiment of the present application provides a chip, comprising a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the method described in the first aspect.

[0017] In a sixth aspect, an embodiment of the present application provides a computer program product, which is stored in a storage medium and is executed by at least one processor to implement the method described in the first aspect.

[0018] In an embodiment of the present application, the electronic device includes: an antenna; an electromagnetic wave absorption ratio SAR sensor, the SAR sensor includes a first terminal and a second terminal, the first terminal is connected to the antenna; a scroll screen, the scroll screen includes a metal frame; wherein, when the scroll screen is in a folded state, the metal frame is connected to the second terminal; when the scroll screen is in an unfolded state, the metal frame is connected to the antenna, or the metal frame is connected to the second terminal. In this way, by connecting the first terminal to the antenna and the metal frame to the second terminal, the influence of temperature drift can be reduced through a differential structure, and the error of the SAR sensor can be reduced, thereby improving the ability of the electronic device to control the antenna to reduce SAR; or by connecting the metal frame to the antenna, the area of ​​the antenna can be increased, thereby increasing the sensing distance of the SAR sensor, reducing the error of the SAR sensor, and further improving the ability of the electronic device to control the antenna to reduce SAR. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is one of the structural schematic diagrams of an electronic device provided in an embodiment of the present application;

[0020] Figure 2 yes Figure 1 A top view of the electronic device shown;

[0021] Figure 3 This is a second structural diagram of an electronic device provided in an embodiment of the present application;

[0022] Figure 4 yes Figure 3 A top view of the electronic device shown;

[0023] Figure 5 This is a third structural diagram of an electronic device provided in an embodiment of the present application;

[0024] Figure 6 yes Figure 5 A top view of the electronic device shown;

[0025] Figure 7 This is a fourth structural diagram of an electronic device provided in an embodiment of the present application;

[0026] Figure 8 yes Figure 7 A top view of the electronic device shown;

[0027] Fig. 9 is a schematic diagram of a detection result of a SAR sensor provided in an embodiment of the present application;

[0028] Fig.10 This is one of the partial structural diagrams of an electronic device provided in an embodiment of the present application;

[0029] Fig.11 This is a second schematic diagram of a partial structure of an electronic device provided in an embodiment of the present application;

[0030] Fig.12 is a flow chart of a calibration method provided in an embodiment of the present application;

[0031] Fig.13 is a structural schematic diagram of a calibration device provided in an embodiment of the present application;

[0032] Fig.14 This is a fifth structural diagram of an electronic device provided in an embodiment of the present application;

[0033] Fig.15 This is the sixth structural diagram of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0035] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0036] The electronic device provided in the embodiment of the present application is described in detail below through specific embodiments and application scenarios in conjunction with the accompanying drawings.

[0037] like Figures 1 to 8 As shown, the electronic device includes:

[0038] Antenna 1;

[0039] An electromagnetic wave absorption ratio SAR sensor 2, wherein the SAR sensor 2 comprises a first terminal 21 and a second terminal 22, wherein the first terminal 21 is connected to the antenna 1;

[0040] A scroll screen, wherein the scroll screen comprises a metal frame 3;

[0041] Wherein, when the scroll screen is in a folded state, the metal frame 3 is connected to the second terminal 22;

[0042] When the roll-up screen is in the unfolded state, the metal frame 3 is connected to the antenna 1 , or the metal frame 3 is connected to the second terminal 22 .

[0043] Among them, the first terminal 21 of the SAR sensor 2 is connected to the antenna 1, which can be called a detection channel; the second terminal 22 of the SAR sensor 2 is connected to the metal frame 3, which can be called a reference channel. The SAR sensor 2 can be a capacitive sensor, which can be used to detect the capacitance value of the capacitive structure formed between the antenna 1 and the human body. The basic working principle of the capacitive structure is that when the human body approaches, a capacitive structure is formed between the human body and the antenna 1, and the size of the capacitance changes accordingly according to the distance. The detection channel can be used to detect the capacitance of the capacitive structure, and the reference channel can perform differential compensation on the detection channel.

[0044] In one embodiment, the first terminal 21 is connected to the antenna 1. Figure 1 and Figure 2 As shown, when the scroll screen is in the unfolded state, the metal frame 3 is connected to the second terminal 22 via the first contact 31; Figure 3 and Figure 4 As shown, when the scroll screen is in a folded state, the metal frame 3 is connected to the second terminal 22 via the second contact 32 .

[0045] In one embodiment, the first terminal 21 is connected to the antenna 1. Figure 5 and Figure 6 As shown, when the scroll screen is in the unfolded state, the metal frame 3 is connected to the antenna 1 through the first contact 31 provided; Figure 7 and Figure 8 As shown, when the scroll screen is in a folded state, the metal frame 3 is connected to the second terminal 22 via the second contact 32 .

[0046] Taking the electronic device as a mobile phone as an example, the metal frame 3 can be the outer movable metal frame of the scroll screen, and when the scroll screen switches between the folded state and the unfolded state, the metal frame 3 is in a moving state. When the scroll screen switches from the folded state to the unfolded state, the metal frame 3 moves away from the antenna 1; when the scroll screen switches from the unfolded state to the folded state, the metal frame 3 moves toward the antenna 1. The antenna 1 can be a metal arm fixed to the inner layer of the electronic device, and the antenna 1 can also be an antenna of a multi-switch combination. The specific form of the antenna 1 is not limited in this embodiment. The electronic device also includes a screen 4, a screen scroll 5, a battery area 6 and a motherboard area 7.

[0047] In this embodiment, an outer movable metal frame of the movable part of the scroll screen and an inner fixed metal antenna are connected to the two ends of the differential line of the SAR sensor 2. The outer movable metal frame can be set according to the antenna length. The inner antenna is connected to the detection channel of the SAR sensor 2, and the outer movable metal frame is connected to the reference channel of the SAR sensor 2. This makes the detection channel and the reference channel both contain metal frames, which is a relatively ideal differential structure, thereby improving the sensing distance of the SAR sensor 2.

[0048] It should be noted that the SAR sensor 2 can be a capacitive sensor circuit, which can be used to detect the capacitance value of the capacitive structure formed between the antenna 1 and the human body. The basic working principle of the capacitive structure is that when the human body approaches, a capacitive structure is formed between the human body and the antenna 1, and the size of the capacitance changes accordingly according to the distance. The SAR sensor 2 is set with a threshold value, which is set to a specific capacitance value, that is, corresponding to a specific distance N (mm). The closer the human body is to the antenna 1, the greater the capacitance. When the human body is constantly approaching and the capacitance value exceeds the threshold value, the SAR sensor 2 triggers and controls the antenna 1 to reduce the SAR. CE and FCC certifications require that the SAR value of N-1 (mm) must meet regulatory standards. When the distance N corresponding to the SAR sensor 2 is limited, the SAR value of the antenna 1 at N-1 (mm) is still high, which means that the SAR of N-1 also needs to be reduced, which also sacrifices performance. Taking the electronic device as a mobile phone as an example, the antenna 1 of some mobile phones with particularly high SAR on the top needs to be reduced by 6dB when triggered on the top surface, and N-1 also needs to be reduced by 3dB.

[0049] In the related art, a pseudo differential line structure is used to reduce the influence of temperature drift. In the pseudo differential line structure, one end of the SAR sensor 2 is connected to the antenna 1, which is called the detection channel; the other end is suspended near the antenna 1, which is called the pseudo differential line reference channel, forming a pseudo differential line structure. Fig. 9 The figure shows the capacitance value (or voltage value) detected by the SAR sensor 2 over a period of time as the PA of the electronic device is turned on and off. Curve L1 represents the detection channel, and curve L3 represents the pseudo-differential line reference channel. The detection values ​​of both are the highest at time t1 when the temperature is the highest. The pseudo-differential line achieves temperature compensation through L1-L3. The pseudo-differential line detection channel is affected by temperature drift and the proximity of the human body, while the reference channel is only affected by temperature drift. The difference between the two only cancels out the impact of temperature drift. In this way, the SAR sensor 2 can perform temperature drift compensation in real time when triggered or not. However, the capacitance of antenna 1 often accounts for a large part. After the heat of the PA of the electronic device is transmitted to antenna 1, this part of the capacitance is greatly affected by temperature, and the error of the compensation by the pseudo-differential line is large, corresponding to Fig. 9The error amount of V1-V3 in the middle, so the compensation effect of the pseudo differential line is limited, and there is still a large error. The threshold value of the SAR sensor 2 is set to take into account the large error margin, thereby limiting the improvement of the sensing distance.

[0050] In the embodiment of the present application, the first terminal 21 is connected to the antenna 1, and when the scroll screen is in a folded state, the metal frame 3 is connected to the second terminal 22 through the second contact 32; when the scroll screen is in an unfolded state, the metal frame 3 is connected to the second terminal 22 through the first contact 31. The pseudo-differential line structure in the related art is improved to a more ideal differential structure in which both the detection channel and the reference channel include conductive components. In this way, the error amount during temperature compensation becomes V1-V2, which is smaller than the error of the pseudo-differential line, the error is reduced, and the threshold value of the SAR sensor 2 can be set to a lower value, thereby increasing the sensing distance.

[0051] In the embodiment of the present application, the electronic device includes: an antenna 1; an electromagnetic wave absorption ratio SAR sensor 2, the SAR sensor 2 includes a first terminal 21 and a second terminal 22, the first terminal 21 is connected to the antenna 1; a scroll screen, the scroll screen includes a metal frame 3; wherein, when the scroll screen is in a folded state, the metal frame 3 is connected to the second terminal 22; when the scroll screen is in an unfolded state, the metal frame 3 is connected to the antenna 1, or the metal frame 3 is connected to the second terminal 22. In this way, by connecting the first terminal 21 to the antenna 1 and the metal frame 3 to the second terminal 22, the influence of temperature drift can be reduced through a differential structure, and the error of the SAR sensor can be reduced, thereby improving the ability of the electronic device to control the antenna 1 to reduce SAR; or by connecting the metal frame 3 to the antenna 1, the area of ​​the antenna 1 can be increased, thereby increasing the sensing distance of the SAR sensor, reducing the error of the SAR sensor, and further improving the ability of the electronic device to control the antenna 1 to reduce SAR.

[0052] Optionally, a first end of the metal frame 3 is provided with a first contact 31 facing the SAR sensor 2, and a second end of the metal frame 3 is provided with a second contact 32 facing the SAR sensor 2;

[0053] When the scroll screen is in the unfolded state, the metal frame 3 is connected to the second terminal 22 through the first contact 31, or the metal frame 3 is connected to the antenna 1 through the first contact 31; when the scroll screen is in the folded state, the metal frame 3 is connected to the second terminal 22 through the second contact 32.

[0054] Wherein, when the scroll screen is in the unfolded state, the first end of the metal frame 3 is closer to the antenna 1 than the second end of the metal frame 3. The first contact 31 can be a conductive contact, for example, it can be a conductive spring, and the conductive spring can be a metal spring. The second contact 32 can be a conductive contact, for example, it can be a conductive spring, and the conductive spring can be a metal spring.

[0055] In this embodiment, when the scroll screen is in the unfolded state, the metal frame 3 is connected to the second terminal 22 through the first contact 31, or the metal frame 3 is connected to the antenna 1 through the first contact 31; when the scroll screen is in the folded state, the metal frame 3 is connected to the second terminal 22 through the second contact 32. In this way, when the scroll screen is in the unfolded state or the folded state, a differential structure is realized or the area of ​​the antenna 1 is increased through the first contact 31 and the second contact 32, thereby improving the ability of the electronic device to control the antenna 1 to reduce SAR.

[0056] Optionally, a first conductive spring 23 is provided on the second terminal 22 , and the first conductive spring 23 is not in contact with the antenna 1 . When the scroll screen is in the unfolded state, the second terminal 22 is connected to the metal frame 3 through the first conductive spring 23 .

[0057] The first conductive spring 23 may be a fixed spring placed under the metal frame 3. For example, the first conductive spring 23 may be a metal spring. The first conductive spring 23 is not connected to the antenna 1. In one embodiment, when the scroll screen is in a folded state and an unfolded state, the first conductive spring 23 is electrically connected to the contact of the metal frame 3.

[0058] In this embodiment, a first conductive spring clip 23 is provided on the second terminal 22, and the first conductive spring clip 23 does not contact the antenna 1. In this way, when the scroll screen switches between the unfolded state and the folded state, a differential structure is realized by connecting the first conductive spring clip 23 with the contact on the metal frame 3, which can reduce the error of the SAR sensor.

[0059] Optionally, the antenna 1 is provided with a second conductive spring sheet, and the second conductive spring sheet is arranged toward the metal frame 3;

[0060] When the scroll screen is in the unfolded state, the first contact 31 is connected to the antenna 1 through the second conductive spring sheet.

[0061] The second conductive spring sheet may be located at one end close to the metal frame 3 when the scroll screen is in the unfolded state. The second conductive spring sheet may be a metal spring sheet.

[0062] In this embodiment, the antenna 1 is provided with a second conductive spring, and the second conductive spring is arranged toward the metal frame 3; when the scroll screen is in the unfolded state, the first contact 31 is connected to the antenna 1 through the second conductive spring. In this way, the antenna 1 is connected to the metal frame 3 through the second conductive spring, which can increase the area of ​​the antenna 1, thereby improving the ability of the electronic device to control the antenna 1 to reduce SAR.

[0063] Optionally, the first end of the antenna 1 is provided with a connecting portion facing the SAR sensor 2, and the first terminal 21 is connected to the antenna 1 through the connecting portion;

[0064] The second conductive spring is located at the first end of the antenna 1 .

[0065] The first end of the antenna 1 may be an end close to the metal frame 3 when the roll-up screen is in the unfolded state.

[0066] In this embodiment, the first end of the antenna 1 is provided with a connecting portion facing the SAR sensor 2, the first terminal 21 is connected to the antenna 1 through the connecting portion, and the second conductive spring sheet and the connecting portion are located at the same end of the antenna 1, so that when the roll-up screen is switched from a folded state to an unfolded state, the contact of the metal frame 3 is connected to the antenna 1 through the second conductive spring sheet, thereby increasing the area of ​​the antenna 1 when the roll-up screen is in the unfolded state.

[0067] Optionally, a feeding point 11 is provided at the first end of the antenna 1 , and the feeding point 11 is located at a side of the antenna 1 where the connecting portion is provided.

[0068] like Fig.10 and Fig.11 As shown, when the scroll screen is in the unfolded state, the position of the feeding point 11 is the point of maximum current, and the end of the antenna 1 away from the feeding point 11 and the end of the metal frame 3 away from the feeding point 11 are both current zero points; when the scroll screen is in the folded state, the position of the feeding point 11 is the point of maximum current, and the end of the antenna 1 away from the feeding point 11 is the current zero point.

[0069] In this embodiment, a feeding point 11 is provided at the first end of the antenna 1. When the scroll screen is in the unfolded state, the first contact 31 is connected to the antenna 1 through the second conductive spring clip. Since the feeding point 11 is located on the side of the antenna 1 where the connecting portion is provided, the current mode of the antenna 1 is a half-wave mode. When the scroll screen is in the folded state, the second conductive spring clip has no contact with the contact of the metal frame 3. Since the feeding point 11 is located on the side of the antenna 1 where the connecting portion is provided, the current mode of the antenna 1 is a quarter mode. The operating frequency in the quarter mode is slightly different from the half-wave mode in the unfolded state.

[0070] Optionally, the connecting portion and the second conductive elastic sheet are located on two sides of the antenna 1 .

[0071] In this embodiment, the connecting portion and the second conductive spring are located on both sides of the antenna 1. The antenna 1 can be connected to the SAR sensor 2 through the connecting portion, and can be connected to the metal frame 3 through the second conductive spring when the scroll screen is in a folded state.

[0072] Optionally, when the roll-up screen is in a folded state, the antenna 1 is located on the inner side of the electronic device relative to the metal frame 3 .

[0073] In this embodiment, when the roll-up screen is in a folded state, the antenna 1 is located on the inner side of the electronic device relative to the metal frame 3, so that during the switching of the roll-up screen between the folded state and the unfolded state, the metal frame 3 will not affect the connection between the antenna 1 and the SAR sensor 2.

[0074] Optionally, a difference between the length of the metal frame 3 and the length of the antenna 1 is smaller than a preset threshold.

[0075] The preset threshold may be set to 0.5 mm, 2 mm, 5 mm, etc., which is not limited in this embodiment.

[0076] In this embodiment, the difference between the length of the metal frame 3 and the length of the antenna 1 is less than a preset threshold, and the heat generation of the metal frame 3 and the antenna 1 is slightly different. When the influence of temperature drift is reduced by a differential structure, temperature drift compensation can be better achieved, and the error of the SAR sensor can be reduced, thereby improving the ability of the electronic device to control the antenna 1 to reduce SAR.

[0077] The electronic device is described below through two specific embodiments:

[0078] Embodiment 1:

[0079] like Figure 1 and Figure 4As shown, two electrical connection contacts, a first contact 31 and a second contact 32, are provided at both ends of the metal frame 3. When the scroll screen is in the unfolded state, the metal frame 3 is connected to the second terminal 22 through the first contact 31. When the scroll screen is in the folded state, the metal frame 3 is connected to the second terminal 22 through the second contact 32. The first conductive spring 23 provided on the second terminal 22 is a fixed spring located below the metal frame 3. The first conductive spring 23 does not contact the antenna 1. The first conductive spring 23 can be electrically connected to the first contact 31 or the second contact 32 of the metal frame 3.

[0080] like Figure 1 As shown, when the scroll screen is in the unfolded state, the first contact 31 of the metal frame 3 is electrically connected to the second terminal 22 of the SAR sensor 2, and the first terminal 21 of the SAR sensor 2 is electrically connected to the antenna 1. The first contact 31 of the metal frame 3 is electrically connected to the fixed first conductive spring 23, and then connected to the second terminal 22 through a capacitor for isolating direct current, while the first terminal 21 is connected to the antenna 1 through a capacitor for isolating direct current. The length of the metal frame 3 is set to be equivalent to that of the antenna 1, so that under the same environment, the heat generation of the metal frame 3 and the antenna 1 is equivalent, and the SAR sensor 2 can achieve better temperature drift compensation, thereby reducing the induction fluctuation of the SAR sensor 2, increasing the threshold of the SAR sensor 2, and then increasing the sensing distance of the SAR sensor 2, and improving the N-1 drop SAR performance of the antenna 1.

[0081] like Figure 3 As shown, when the scroll screen is in the folded state, the metal frame 3 moves to the top of the antenna 1. At this time, the first contact 31 of the metal frame 3 moves away from the first conductive spring 23, and becomes the second contact 32 of the metal frame 3, which is electrically connected to the first conductive spring 23, and then connected to the second terminal 22 through a capacitor for isolating DC, while the first terminal 21 is connected to the antenna 1 through a capacitor for isolating DC. The metal frame 3 is located above the antenna 1 as a suspended metal, which has a certain influence on the radiation of the antenna 1. However, under the same environment, the heat generation of the metal frame 3 and the antenna 1 is equivalent, and the SAR sensor 2 can achieve better temperature drift compensation, thereby reducing the induction fluctuation of the SAR sensor 2, increasing the threshold of the SAR sensor 2, and then increasing the sensing distance of the SAR sensor 2, and improving the N-1 drop SAR performance of the antenna 1.

[0082] In this embodiment, the movable metal frame 3 of the scroll screen is used as one end of the differential compensation, so as to increase the sensing distance of the SAR sensor 2 and improve the N-1 drop SAR performance of the antenna 1 .

[0083] Embodiment 2:

[0084] like Figure 5and Figure 8 As shown, two electrical connection contacts, a first contact 31 and a second contact 32, are provided at both ends of the metal frame 3. When the scroll screen is in the unfolded state, the metal frame 3 is connected to the antenna 1 through the first contact 31. When the scroll screen is in the folded state, the metal frame 3 is connected to the second terminal 22 through the second contact 32. The first conductive spring 23 provided on the second terminal 22 is a fixed spring located below the metal frame 3. The first conductive spring 23 does not contact the antenna 1. The first conductive spring 23 can be electrically connected to the second contact 32 of the metal frame 3. A second conductive spring is provided at the left end of the antenna 1. When the scroll screen is in the unfolded state, the first contact 31 is connected to the antenna 1 through the second conductive spring.

[0085] like Figure 5 As shown, when the scroll screen is in the unfolded state, the first contact 31 of the outer movable metal frame 3 is electrically connected to the second conductive spring on the antenna 1 body. At this time, the movable metal frame 3 becomes the other half of the radiation arm of the antenna 1, and the current of the antenna 1 is in a half-wave mode, such as Figure 4 After the metal frame 3 is used as a radiator, the connection terminal of the SAR sensor 2 is only connected to the antenna 1 and the first conductive spring 23. At this time, it is a pseudo-differential structure. The SAR sensor 2 cannot improve the sensing distance by improving the differential line, but the area of ​​the antenna 1 is doubled, and the sensing distance of the SAR sensor 2 is still significantly improved, thereby improving the N-1 drop SAR performance of the antenna 1.

[0086] like Figure 7 As shown, when the scroll screen is in the folded state, the metal frame 3 moves to the top of the antenna 1. At this time, the first contact 31 of the metal frame 3 moves away from the second conductive spring sheet, and becomes the second contact 32 electrically connected to the first conductive spring sheet 23, and then connected to the second terminal 22 through a capacitor for isolating DC, while the first terminal 21 is connected to the antenna 1 through a capacitor for isolating DC. The antenna 1 is not connected to the metal frame 3. At this time, the current mode is a quarter mode, and the operating frequency is slightly different from the half-wave mode in the unfolded state. The metal frame 3 is located above the antenna 1 as a suspended metal, which has a certain influence on the radiation of the antenna 1. However, under the same environment, the heat generation of the metal frame 3 and the antenna 1 is equivalent, and the SAR sensor 2 can achieve better temperature drift compensation, thereby reducing the induction fluctuation of the SAR sensor 2, increasing the threshold of the SAR sensor 2, and then improving the sensing distance of the SAR sensor 2, and improving the N-1 drop SAR performance of the antenna 1.

[0087] In this embodiment, when the scroll screen is in a folded state, the movable metal frame 3 of the scroll screen is used as one end of the differential compensation, thereby increasing the sensing distance of the SAR sensor 2 and improving the N-1 drop SAR performance of the antenna 1; and when the scroll screen is in an unfolded state, the sensing distance of the SAR sensor 2 is increased by increasing the area of ​​the antenna 1, thereby improving the N-1 drop SAR performance of the antenna 1.

[0088] See also Fig.12 , Fig.12 is a flow chart of a calibration method provided in an embodiment of the present application, wherein the calibration method is applied to an electronic device provided in an embodiment of the present application, such as Fig.12 As shown, the following steps are included:

[0089] Step 101: determining a differential compensation value corresponding to the SAR sensor based on detection values ​​of the first wiring terminal and the second wiring terminal;

[0090] Step 102: Determine a threshold value of the SAR sensor based on the differential compensation value, wherein the threshold value is used to determine whether to control the antenna to reduce SAR when the antenna SAR reduction is not triggered.

[0091] Among them, the threshold value is used to determine whether to control the antenna to reduce SAR when the antenna SAR reduction is not triggered, and temperature drift compensation is performed only when the SAR sensor is not triggered. After the threshold value is determined with a differential compensation value leaving a margin, the triggering condition can only be met when a human body approaches and causes a drastic change in the capacitance value. Once the antenna SAR reduction is triggered, the SAR reduction function can be achieved whether or not temperature compensation is performed. Therefore, temperature compensation is not required at this time, and only the detection value of the detection channel of the SAR sensor can be referred to determine whether to control the antenna SAR reduction.

[0092] It should be noted that since the reference channel of the SAR sensor is connected to the metal frame, the capacitance value will change when a human body approaches. The SAR sensor can perform compensation calibration in scenarios such as turning the electronic device on and off, plugging in headphones, and detecting a negative capacitance value. The SAR sensor does not need to perform real-time compensation.

[0093] In the embodiment of the present application, the differential compensation value corresponding to the SAR sensor is determined based on the detection values ​​of the first terminal and the second terminal; the threshold of the SAR sensor is determined based on the differential compensation value, and the threshold is used to determine whether to control the antenna to reduce the SAR when the antenna is not triggered to reduce the SAR. In this way, when the antenna is not triggered to reduce the SAR, it is determined by the threshold whether to control the antenna to reduce the SAR, and there is no need to perform differential compensation in real time, which can reduce the power consumption of the electronic device.

[0094] The calibration method provided in the embodiment of the present application can be executed by a calibration device. In the embodiment of the present application, a method for a calibration device to execute loading calibration is taken as an example to illustrate the calibration device provided in the embodiment of the present application.

[0095] See also Fig.13 , Fig.13 is a schematic diagram of a calibration device provided in an embodiment of the present application, wherein the calibration device is applied to Figures 1 to 8 The electronic equipment shown, such as Fig.13 As shown, the calibration device 200 comprises:

[0096] A first determining module 201, configured to determine a differential compensation value corresponding to the SAR sensor based on detection values ​​of the first wiring terminal and the second wiring terminal;

[0097] The second determination module 202 is configured to determine a threshold value of the SAR sensor based on the differential compensation value, wherein the threshold value is used to determine whether to control the antenna to reduce SAR when the antenna SAR reduction function is not triggered.

[0098] Alternatively, if Fig.14 As shown, an embodiment of the present application further provides an electronic device 300, including a processor 301 and a memory 302, wherein the memory 302 stores programs or instructions that can be executed on the processor 301, and when the program or instructions are executed by the processor 301, the various steps of the above-mentioned calibration method embodiment are implemented, and the same technical effect can be achieved. To avoid repetition, they are not described here.

[0099] Fig.15 A schematic diagram of the hardware structure of an electronic device to implement an embodiment of the present application.

[0100] The electronic device 400 includes but is not limited to: a radio frequency unit 401, a network module 402, an audio output unit 403, an input unit 404, a sensor 405, a display unit 406, a user input unit 407, an interface unit 408, a memory 409, a processor 410 and other components.

[0101] Those skilled in the art will appreciate that the electronic device 400 may also include a power source (such as a battery) for supplying power to each component, and the power source may be logically connected to the processor 410 through a power management system, thereby implementing functions such as managing charging, discharging, and power consumption management through the power management system. Fig.15 The electronic device structure shown in the figure does not constitute a limitation on the electronic device. The electronic device may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently, which will not be described in detail here.

[0102] Among them, the electronic device 400 is Figure 1Electronic equipment shown.

[0103] The processor 410 is used for:

[0104] Determining a differential compensation value corresponding to the SAR sensor based on the detection values ​​of the first wiring terminal and the second wiring terminal;

[0105] A threshold value of the SAR sensor is determined based on the differential compensation value, and the threshold value is used to determine whether to control the antenna to reduce the SAR when the antenna is not triggered to reduce the SAR.

[0106] It should be understood that in the embodiment of the present application, the input unit 404 may include a graphics processor (Graphics Processing Unit, GPU) 4041 and a microphone 4042, and the graphics processor 4041 processes the image data of the static picture or video obtained by the image capture device (such as a camera) in the video capture mode or the image capture mode. The display unit 406 may include a display panel 4061, and the display panel 4061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 407 includes a touch panel 4071 and at least one of other input devices 4072. The touch panel 4071 is also called a touch screen. The touch panel 4071 may include two parts: a touch detection device and a touch controller. Other input devices 4072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which will not be repeated here.

[0107] The memory 409 can be used to store software programs and various data, including but not limited to application programs and operating systems. The memory 409 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area may store an operating system, an application program or instruction required for at least one function (such as a sound playback function, an image playback function, etc.), etc. In addition, the memory 409 may include a volatile memory or a non-volatile memory, or the memory 409 may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), a static random access memory (SRAM), a dynamic random access memory (DRAM), a synchronous dynamic random access memory (SDRAM), a double data rate synchronous dynamic random access memory (DDRSDRAM), an enhanced synchronous dynamic random access memory (ESDRAM), a synchronous link dynamic random access memory (SLDRAM) and a direct memory bus random access memory (DRRAM). The memory 409 in the embodiment of the present application includes but is not limited to these and any other suitable types of memory.

[0108] The processor 410 may include one or more processing units; optionally, the processor 410 integrates an application processor and a modem processor, wherein the application processor mainly processes operations related to an operating system, a user interface, and application programs, and the modem processor mainly processes wireless communication signals, such as a baseband processor. It is understandable that the modem processor may not be integrated into the processor 410.

[0109] An embodiment of the present application also provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, each process of the above-mentioned calibration method embodiment is implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0110] The processor is the processor in the electronic device described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a computer read-only memory ROM, a random access memory RAM, a magnetic disk or an optical disk.

[0111] An embodiment of the present application further provides a chip, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the various processes of the above-mentioned calibration method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0112] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0113] An embodiment of the present application provides a computer program product, which is stored in a storage medium. The program product is executed by at least one processor to implement the various processes of the above-mentioned calibration method embodiment and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0114] It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, 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 process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises one..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be noted that the scope of the method and device in the embodiment of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0115] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a computer software product, which is stored in a storage medium (such as ROM / RAM, a disk, or an optical disk), and includes a number of instructions for a terminal (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present application.

[0116] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. An electronic device, characterized in that: The electronic device comprises: Antenna (1); An electromagnetic wave absorption ratio SAR sensor (2), the SAR sensor (2) comprising a first wiring terminal (21) and a second wiring terminal (22), the first wiring terminal (21) being connected to the antenna (1); A scroll screen, the scroll screen comprising a metal frame (3); Wherein, when the scroll screen is in a folded state, the metal frame (3) is connected to the second wiring terminal (22); When the scroll screen is in an unfolded state, the metal frame (3) is connected to the antenna (1), or the metal frame (3) is connected to the second wiring terminal (22); When the scroll screen is in a folded state, the antenna (1) is located on the inner side of the electronic device relative to the metal frame (3).

2. The electronic device according to claim 1, characterized in that: A first contact (31) facing the SAR sensor (2) is provided at the first end of the metal frame (3), and a second contact (32) facing the SAR sensor (2) is provided at the second end of the metal frame (3); When the scroll screen is in an unfolded state, the metal frame (3) is connected to the second terminal (22) via the first contact (31), or the metal frame (3) is connected to the antenna (1) via the first contact (31); when the scroll screen is in a folded state, the metal frame (3) is connected to the second terminal (22) via the second contact (32).

3. The electronic device according to claim 1, characterized in that: A first conductive spring sheet (23) is provided on the second wiring terminal (22), and the first conductive spring sheet (23) is not in contact with the antenna (1). When the scroll screen is in an unfolded state, the second wiring terminal (22) is connected to the metal frame (3) via the first conductive spring sheet (23).

4. The electronic device according to claim 2, characterized in that: The antenna (1) is provided with a second conductive spring sheet, and the second conductive spring sheet is arranged toward the metal frame (3); When the scroll screen is in an unfolded state, the first contact point (31) is connected to the antenna (1) via the second conductive spring sheet.

5. The electronic device according to claim 4, characterized in that: The first end of the antenna (1) is provided with a connection portion facing the SAR sensor (2), and the first wiring terminal (21) is connected to the antenna (1) via the connection portion; The second conductive spring is located at the first end of the antenna (1).

6. The electronic device according to claim 5, characterized in that: A feeding point (11) is provided at the first end of the antenna (1), and the feeding point (11) is located on a side of the antenna (1) where the connecting portion is provided.

7. The electronic device according to claim 5, characterized in that: The connecting portion and the second conductive spring are located on two sides of the antenna (1).

8. The electronic device according to claim 1, characterized in that: The difference between the length of the metal frame (3) and the length of the antenna (1) is less than a preset threshold.

9. A calibration method, characterized in that: Applied to the electronic device according to any one of claims 1 to 8, the method comprising: Determining a differential compensation value corresponding to the SAR sensor based on the detection values ​​of the first wiring terminal and the second wiring terminal; A threshold value of the SAR sensor is determined based on the differential compensation value, and the threshold value is used to determine whether to control the antenna to reduce the SAR when the antenna is not triggered to reduce the SAR.

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