CN113573390A

CN113573390A - Antenna power adjusting method, terminal device and storage medium

Info

Publication number: CN113573390A
Application number: CN202010359679.9A
Authority: CN
Inventors: 苏子剑; 王毅; 王辉; 余香涛
Original assignee: Honor Device Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2020-04-29
Filing date: 2020-04-29
Publication date: 2021-10-29
Anticipated expiration: 2040-04-29
Also published as: WO2021218540A1; CN113573390B

Abstract

The application is applicable to the technical field of communication, and particularly relates to an antenna power adjusting method, a terminal device and a computer readable storage medium, wherein the method can acquire an image acquired by a camera, perform image analysis to determine whether a predetermined target close to the terminal device is a head, a body or a hand, and determine an antenna to be adjusted corresponding to the predetermined target and needing power adjustment, so that the transmitting power of the antenna to be adjusted can be reduced according to a back-off parameter corresponding to the predetermined target, wherein the back-off parameters corresponding to different predetermined targets are different. The method and the device for adjusting the antenna transmission power can accurately determine the type of the preset target close to the terminal device, and can accurately determine the antenna to be adjusted corresponding to the preset target, so that the transmission power of the antenna to be adjusted can be reduced based on different back-off parameters according to different preset targets, the communication performance of the terminal device is improved on the basis that the terminal device is ensured to meet SAR indexes, and the communication experience of a user is improved.

Description

Antenna power adjusting method, terminal device and storage medium

Technical Field

The present application relates to the field of communications technologies, and in particular, to an antenna power adjustment method, a terminal device, and a computer-readable storage medium.

Background

Specific Absorption Rate (SAR) refers to the electromagnetic radiation energy absorbed or consumed by a unit mass of a human body in a unit time, and is used for measuring the influence of electromagnetic radiation on the human body, wherein the larger the SAR is, the larger the influence on the human body is. In order to reduce the influence of electromagnetic radiation on the human body, when a user approaches a terminal device, the transmission power of an antenna in the terminal device is generally reduced to reduce SAR.

In the prior art, whether a human body approaches a terminal device is generally determined by a proximity capacitive sensor or a proximity optical sensor in the terminal device, and when the human body approaches the terminal device, the transmission power of all antennas in the terminal device is reduced based on a unified standard. However, the distances between the antennas at different positions in the terminal device and the human body are different, so the generated SAR is also different, and the power of all the antennas is uniformly reduced indiscriminately, which may cause the communication performance of the terminal device to be reduced and affect the communication experience of the user.

Disclosure of Invention

The embodiment of the application provides an antenna power adjusting method, a terminal device and a computer readable storage medium, which can improve the efficiency of adjusting the antenna power in the terminal device, ensure the communication performance of the terminal device and improve the communication experience of a user.

In a first aspect, an embodiment of the present application provides an antenna power adjusting method, which is applied to a terminal device, where the method may include:

acquiring an image acquired by a camera in the terminal equipment, and determining a preset target according to the image, wherein the preset target comprises at least one of a head, a body and a hand, and a first distance between the preset target and the terminal equipment is smaller than a first distance threshold;

and determining an antenna to be adjusted corresponding to the preset target, and reducing the transmitting power of the antenna to be adjusted according to the back-off parameter corresponding to the preset target.

Illustratively, the image comprises a first image acquired by a front camera and a second image acquired by a rear camera, and the determining the predetermined target according to the images comprises:

a first target feature in the first image and a second target feature in a second image are identified, and the predetermined target is determined based on the first target feature and the second target feature.

Here, the first distance between the object and the terminal device may be determined according to an image area occupied by the object in the first image/the second image. It should be understood that when the object occupies a larger image area in the image, the smaller the first distance between the object and the terminal device, the closer the object is to the terminal device; the first distance between the object and the terminal device is larger and the object is further away from the terminal device, when the object occupies a smaller image area in the image. Specifically, the correspondence between the image area occupied by the object in the image and the first distance may be obtained through testing in advance. Therefore, when it is determined that the object exists in the first image/the second image, the image area of the object in the first image/the second image may be detected, and the first distance between the object and the terminal device may be determined according to the image area and the correspondence to determine whether the object is a predetermined object near the terminal device according to whether the first distance is smaller than a first distance threshold.

Specifically, when the predetermined target is determined, a first target feature in the first image may be identified, when the first target feature is a local head feature, a first distance between a head corresponding to the first target feature and the terminal device may be immediately determined, and if the first distance is smaller than a first distance threshold, it may be determined that the terminal device is in a head-on-head call state (e.g., an earpiece call state), that is, it is determined that the predetermined target close to the terminal device includes the head. When the first target feature is a facial feature, it can be indicated that the user is currently reading a screen by facing the terminal device, at this time, a second target feature in the second image can be further identified, and when the second target feature is an environmental feature, it can be determined that the terminal device is in a handheld screen reading state, that is, it is determined that the predetermined target close to the terminal device includes a hand; when the second target feature is a body feature, a first distance between a body corresponding to the second target feature and the terminal device can be immediately determined, and if the first distance is smaller than a first distance threshold value, the terminal device can be determined to be in a screen reading state placed on the body, namely, the preset target close to the terminal device is determined to comprise the body; when the second target feature is the object shape feature or the object material feature, it may be determined that the terminal device is in a screen reading state of being placed on the object, that is, it is determined that there is no predetermined target close to the terminal device. When the first target feature is an environmental feature, the second target feature is a body feature, and meanwhile the first distance between the body corresponding to the second target feature and the terminal device is smaller than the first distance threshold, or when the first target feature is a body feature and the first distance between the body corresponding to the first target feature and the terminal device is smaller than the first distance threshold, it may be determined that the terminal device is in a non-screen reading state placed on the body, that is, it is determined that the predetermined target close to the terminal device includes the body. When the first target feature and the second target feature are both environment features, it can be determined that the terminal device is in a handheld non-screen reading state, that is, it is determined that the predetermined target close to the terminal device includes a hand. When the first target feature is an environmental feature and the second target feature is an object shape feature or an object material feature, or when the second target feature is an environmental feature and the first target feature is an object shape feature or an object material feature, it may be determined that the terminal device is in a non-screen-reading state placed on the object, that is, it is determined that there is no predetermined target close to the terminal device.

In a possible implementation manner of the first aspect, the image includes a first image captured by a front camera and a second image captured by a rear camera, and the determining the predetermined target according to the image may include:

identifying a first target feature in the first image and a second target feature in the second image;

acquiring light information in a screen;

determining the predetermined target according to the first target feature, the second target feature and the light information.

In the implementation mode, the image collected by the camera and the light information in the screen can be acquired, and the predetermined target can be determined according to the image and the light information, so that the accuracy of determining the predetermined target is improved.

It should be understood that when the terminal device is in a handheld screen reading state, a hand of a user can shield a partial area in a screen, so that light emitted by a partial light source in the screen is reflected to a light sensor in the screen after being shielded by the hand. Therefore, the shielding area in the screen can be determined according to the light information acquired by the light sensor so as to determine whether the terminal device is in a handheld screen reading state.

In particular, a first target feature in a first image and a second target feature in a second image may be identified. When the first target feature is a head feature and a first distance between a head corresponding to the first target feature and the terminal device is smaller than a first distance threshold, determining that the predetermined target comprises the head. When the first target feature is a face feature, a shielding region in the screen can be obtained according to the light information in the screen, and the region area and the region position of the shielding region are determined. And if the area of the region is smaller than the second area threshold value and the distribution of the positions of the region meets a first preset condition, determining that the preset target comprises a hand. And if the area of the region is larger than or equal to the second area threshold value, or the distribution of the positions of the region does not meet the first preset condition, and the second target feature is a body feature, determining that the predetermined target comprises a body. When the first target feature is an environmental feature, the second target feature is a physical feature, and a first distance between a body corresponding to the second target feature and the terminal device is smaller than a first distance threshold, or when the first target feature is a physical feature and a first distance between the body corresponding to the first target feature and the terminal device is smaller than a first distance threshold, it is determined that the predetermined target includes the body. When the first target feature and the second target feature are both environmental features, it is determined that the predetermined target includes a hand.

In another possible implementation manner of the first aspect, the image includes a first image captured by a front camera and a second image captured by a rear camera, and the determining the predetermined target according to the image may include:

acquiring impedance change values of all antennas in the terminal equipment;

and determining the predetermined target according to the first target characteristic, the second target characteristic and each impedance change value.

In the implementation mode, the image acquired by the camera and the impedance change value of each antenna in the terminal equipment can be acquired, and the predetermined target can be determined according to the image and the impedance change value, so that the accuracy of determining the predetermined target is improved.

It should be understood that when the terminal device is in the handheld screen reading state, the hand of the user generally contacts a partial area of the terminal device, so that the impedance of the antenna corresponding to the partial area may be greatly changed. Therefore, the terminal device can determine the area of the hand-held terminal device according to the impedance change value of each antenna so as to determine whether the terminal device is in the hand-held screen reading state.

In particular, a first target feature in a first image and a second target feature in a second image may be identified. When the first target feature is a head feature and a first distance between a head corresponding to the first target feature and the terminal device is smaller than a first distance threshold, determining that the predetermined target comprises the head. And when the first target feature is a face feature, determining a target antenna according to the impedance change value of each antenna in the terminal equipment, wherein the target antenna is an antenna of which the impedance change value is larger than a preset change threshold value. And if the position distribution of the target antenna meets a second preset condition, determining that the preset target comprises a hand. And if the position distribution of the target antenna does not meet the second preset condition and the second target characteristic is the body characteristic, determining that the preset target comprises the body. When the first target feature is an environmental feature, the second target feature is a physical feature, and a first distance between a body corresponding to the second target feature and the terminal device is smaller than a first distance threshold, or when the first target feature is a physical feature and a first distance between the body corresponding to the first target feature and the terminal device is smaller than a first distance threshold, it is determined that the predetermined target includes the body. When the first target feature and the second target feature are both environmental features, it is determined that the predetermined target includes a hand.

In one example, the present application embodiments may also determine the predetermined target based on the image and the capacitance change/resistance change. For example, when the first target feature is a facial feature, the terminal device may acquire a change region of capacitance change/resistance change in the screen and may determine a region position of the change region. When the area position distribution satisfies a third preset condition, it may be determined that the preset target includes a hand. The third preset condition may be the same as the first preset condition, that is, the third preset condition may be the position distribution of the touch screen at the positions of the fingers, the palm, and the like when the hand holds the terminal device.

In one example, the embodiment of the present application may also determine the predetermined target by combining the light information in the screen, the impedance change value of each antenna, and the image. For example, when the first target feature is a face feature, the terminal device may obtain a shielding region in the screen according to light information in the screen, and may determine a region area and a region position of the shielding region, and may determine the target antenna according to an impedance change value of each antenna in the terminal device, and when the region area is smaller than a second area threshold, and the distribution of the region position satisfies a first preset condition, and the distribution of the position of the target antenna satisfies a second preset condition, determine that the preset target includes a hand.

For example, the determining the antenna to be adjusted corresponding to the predetermined target may include:

acquiring a shielding region in the screen according to light information in the screen, and determining the region area and the region position of the shielding region;

and determining the antenna to be adjusted corresponding to the preset target according to the area and the position of the area.

It should be noted that, when the predetermined target includes the head portion, that is, when the terminal device is used close to the head portion, the head portion may shield a part of the light emitted by the light source in the screen, and the shielded light may be reflected into the screen. Similarly, when the predetermined target includes a hand, that is, when the user holds the terminal device, the hand of the user also shields a part of the area in the screen, so that part of the light emitted by the light source in the screen is reflected into the screen after being shielded by the hand. Therefore, after determining that the predetermined target includes a head and/or a hand, the terminal device may determine an antenna to be adjusted corresponding to the predetermined target according to the light information in the screen.

Specifically, when the predetermined target is a head, the determining the antenna to be adjusted corresponding to the predetermined target according to the area of the region and the position of the region may include:

and acquiring a first target shielding area according to the area and the area position, and determining a first target antenna corresponding to the first target shielding area as an antenna to be adjusted corresponding to the head, wherein the first target shielding area is a shielding area with an area larger than a first area threshold value and an area position as a preset position.

The first area threshold value can be determined by analyzing the area of the area where the head is close to the terminal device when the user uses the terminal device close to the head. Since the head is generally close to the upper side of the terminal device when the head is attached to the terminal device, the preset position may be set to a position near the upper edge of the terminal device or near the front camera in the screen.

Specifically, when the predetermined target is a hand, the determining the antenna to be adjusted corresponding to the predetermined target according to the area of the region and the position of the region may include:

and determining a second target shielding area according to the area and the area position, determining a second target antenna corresponding to the second target shielding area as an antenna to be adjusted corresponding to the hand, wherein the second target shielding area is a shielding area with an area smaller than a second area threshold value and with area position distribution meeting preset conditions.

The second area threshold value can be determined by analyzing the contact area or the shielding area formed by the hand of the user and the screen when the user holds the terminal device, and the second area threshold value is smaller than the first area threshold value in the head. The preset condition may be a position distribution of fingers, palms, and the like in the screen when the terminal device is held by the hand, for example, the position distribution may be a single point or multiple points on the left side, the right side, and/or the middle of the screen.

determining a third target antenna according to the impedance change value of each antenna in the terminal equipment, and acquiring the position information of the third target antenna, wherein the impedance change value of the third target antenna is larger than a preset change threshold value;

and determining an antenna to be adjusted corresponding to the preset target according to the position information of the third target antenna.

It should be noted that when an object is tightly attached to a certain antenna in the terminal device, the impedance of the antenna may change greatly. When the predetermined object includes a head, that is, when the terminal device is used near the head, the head generally abuts against the upper side of the terminal device, so that the impedance of the antenna to which the head abuts may be largely changed. Similarly, when a user holds a terminal device by hand, if an antenna is included in a position where the user holds the terminal device by hand, the impedance of the antenna also changes greatly. Therefore, when it is determined that the predetermined target includes the head and/or the hand, the terminal device may further determine the antenna to be adjusted corresponding to the predetermined target according to the impedance change value of each antenna.

For example, when the predetermined target includes a head and/or a hand, the terminal device may also determine an antenna to be adjusted corresponding to the predetermined target by combining the light information in the screen and the impedance change value of the antenna. For example, when the predetermined target includes a head, a first target antenna and a third target antenna may be respectively determined according to light information in the screen and impedance change values of the antennas, and then the first target antenna and the third target antenna may be uniformly determined as antennas to be adjusted corresponding to the head; or an antenna overlapped in the first target antenna and the third target antenna may be determined as an antenna to be adjusted corresponding to the head. When the predetermined target includes the head, a first target shielding area may also be determined according to light information in the screen, then an impedance change value of a first target antenna corresponding to the first target shielding area may be obtained, and the first target antenna having the impedance change value larger than a preset change threshold may be determined as the antenna to be adjusted corresponding to the head.

It should be understood that when the terminal device is close to the head, there may also be a case of being close to the hand at the same time. Therefore, when it is determined that the predetermined target includes the head from the first image, it may be determined whether there is a case where the terminal device is hand-held from the light information in the screen and/or the impedance change value of the antenna when it is determined that the head is an area near the terminal device from the light information in the screen and/or the impedance change value of the antenna, and when there is a case where the terminal device is hand-held, it may be determined that the area is hand-held in the terminal device. Therefore, when the predetermined target comprises a head and a hand, a first antenna to be adjusted corresponding to the head can be determined according to an area where the head is close to the terminal device, a second antenna to be adjusted corresponding to the hand can be determined according to an area where the hand is held in the terminal device, the transmission power of the first antenna to be adjusted can be adjusted according to the head SAR, so that the first antenna to be adjusted close to the head meets the head SAR index, and meanwhile, the transmission power of the second antenna to be adjusted can be adjusted according to the limb SAR, so that the second antenna to be adjusted close to the hand meets the limb SAR index.

For example, when the screen of the terminal device is a capacitive screen or a resistive screen, if an object touches a certain area in the screen, the area may generate a capacitance change or a resistance change. When the predetermined object includes a head or a hand, that is, when the terminal device is used near the head or near the hand, the head or the hand generally contacts a partial area in the screen, so that the partial area generates a capacitance change or a resistance change. Therefore, the terminal device can also determine the antenna to be adjusted corresponding to the head or the hand according to the capacitance change and the change area of the screen or the resistance change and the change area of the screen.

In a possible implementation manner of the first aspect, after reducing the transmission power of the antenna to be adjusted according to the backoff parameter corresponding to the predetermined target, the method may include:

and acquiring the transmitting power of each antenna in the terminal equipment, and switching the transmitting antenna of the terminal equipment according to the transmitting power.

It should be understood that after the transmission power of the antenna to be adjusted is reduced, the current transmission power of each antenna in the terminal device may be obtained, and the transmission antenna of the terminal device may be switched according to the current transmission power of each antenna, so as to switch the transmission antenna of the terminal device to an antenna with higher transmission power, thereby improving the communication performance of the terminal device and improving the communication experience of the user.

In another possible implementation manner of the first aspect, after reducing the transmission power of the antenna to be adjusted according to the backoff parameter corresponding to the predetermined target, the method may include:

and acquiring a second distance between each antenna in the terminal equipment and the preset target, and switching the transmitting antenna of the terminal equipment according to the second distance.

It should be understood that, after the transmission power of the antenna to be adjusted is reduced, to further reduce the influence of electromagnetic radiation generated by the antenna on the user, a second distance between each antenna in the terminal device and the predetermined target may be obtained, and the transmission antenna of the terminal device may be switched according to the second distance, so as to switch the transmission antenna of the terminal device to an antenna farther from the predetermined target. For example, when the head is close to the terminal device, the transmitting antenna may be switched from an antenna located on the upper side of the terminal device close to the head to an antenna located on the lower side of the terminal device far from the head, or to an antenna on the back of the terminal device. When the terminal device is held by hand, the transmitting antenna may be switched from the antenna held by hand to the antenna not held by hand.

In a second aspect, an embodiment of the present application provides an antenna power adjusting apparatus, which is applied to a terminal device, and the apparatus may include:

the preset target determining module is used for acquiring an image acquired by a camera in the terminal equipment and determining a preset target according to the image, wherein the preset target comprises at least one of a head, a body and a hand, and a first distance between the preset target and the terminal equipment is smaller than a first distance threshold;

and the antenna power adjusting module is used for determining an antenna to be adjusted corresponding to the preset target and reducing the transmitting power of the antenna to be adjusted according to the back-off parameter corresponding to the preset target.

For example, the images include a first image captured by a front camera and a second image captured by a rear camera, and the predetermined target determination module may include:

a first target determination unit for identifying a first target feature in the first image and a second target feature in a second image and determining the predetermined target according to the first target feature and the second target feature.

In a possible implementation manner of the second aspect, the images include a first image captured by a front camera and a second image captured by a rear camera, and the predetermined target determination module may include:

a first feature recognition unit configured to recognize a first target feature in the first image and a second target feature in the second image;

the light information acquisition unit is used for acquiring light information in a screen;

a second target determination unit for determining the predetermined target according to the first target feature, the second target feature and the light information.

a second feature recognition unit for recognizing a first target feature in the first image and a second target feature in the second image;

an impedance change acquiring unit, configured to acquire an impedance change value of each antenna in the terminal device;

a third target determination unit configured to determine the predetermined target according to the first target feature, the second target feature, and each of the impedance change values.

Illustratively, the antenna power adjustment module may include:

the shielding region acquiring unit is used for acquiring a shielding region in the screen according to the light ray information in the screen and determining the region area and the region position of the shielding region;

and the first antenna determining unit is used for determining the antenna to be adjusted corresponding to the preset target according to the area and the area position.

Specifically, when the predetermined target is a head, the first antenna determining unit is configured to obtain a first target blocking area according to the area and the area position, and determine a first target antenna corresponding to the first target blocking area as an antenna to be adjusted corresponding to the head, where the first target blocking area is a blocking area whose area is larger than a first area threshold and whose area position is a preset position.

Specifically, when the predetermined target is a hand, the first antenna determining unit is configured to determine a second target blocking area according to the area and the area position, and determine a second target antenna corresponding to the second target blocking area as an antenna to be adjusted corresponding to the hand, where the second target blocking area is a blocking area whose area is smaller than a second area threshold and whose area position distribution meets a preset condition.

Illustratively, the antenna power adjustment module may include:

the position information acquiring unit is used for determining a third target antenna according to the impedance change value of each antenna in the terminal equipment and acquiring the position information of the third target antenna, wherein the third target antenna is an antenna of which the impedance change value is larger than a preset change threshold;

and the second antenna determining unit is used for determining the antenna to be adjusted corresponding to the preset target according to the position information of the third target antenna.

In a possible implementation manner of the second aspect, the apparatus may further include:

and the first antenna switching module is used for acquiring the transmitting power of each antenna in the terminal equipment and switching the transmitting antenna of the terminal equipment according to the transmitting power.

In another possible implementation manner of the second aspect, the apparatus may further include:

and the second antenna switching module is used for acquiring a second distance between each antenna in the terminal equipment and the preset target and switching the transmitting antenna of the terminal equipment according to the second distance.

In a third aspect, an embodiment of the present application provides a terminal device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor, when executing the computer program, implements the antenna power adjustment method according to any one of the foregoing first aspects.

In a fourth aspect, the present application provides a computer-readable storage medium, which stores a computer program, and when the computer program is executed by a processor, the computer program implements the antenna power adjustment method according to any one of the foregoing first aspects.

In a fifth aspect, the present application provides a computer program product, which when run on a terminal device, causes the terminal device to execute the antenna power adjustment method according to any one of the above first aspects.

It is understood that the beneficial effects of the second aspect to the fifth aspect can be referred to the related description of the first aspect, and are not described herein again.

Compared with the prior art, the embodiment of the application has the advantages that:

in the embodiment of the application, the image acquired by the camera can be acquired, the image analysis is performed to determine whether the preset target close to the terminal device is the head, the body or the hand, and the antenna to be adjusted corresponding to the preset target and needing power adjustment is determined, so that the transmitting power of the antenna to be adjusted can be reduced according to the back-off parameters corresponding to the preset target, wherein the back-off parameters corresponding to different preset targets are different. The method and the device for adjusting the antenna transmission power can accurately determine the type of the preset target close to the terminal device, and can accurately determine the antenna to be adjusted corresponding to the preset target, so that the transmission power of the antenna to be adjusted can be reduced based on different back-off parameters according to different preset targets, the communication performance of the terminal device is improved on the basis that the terminal device is ensured to meet SAR indexes, and the communication experience of a user is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions 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 inventive exercise.

Fig. 1 is a diagram showing an example of the distribution of antennas in a terminal device;

fig. 2 is a schematic flowchart of an antenna power adjustment method according to an embodiment of the present application;

FIG. 3 is a first exemplary diagram of a terminal device near a human body according to an embodiment of the present disclosure;

fig. 4a is a second exemplary diagram of a terminal device provided in an embodiment of the present application, close to a human body;

fig. 4b is a third exemplary diagram of a terminal device provided by an embodiment of the present application, close to a human body;

fig. 4c is a fourth exemplary diagram of the terminal device provided by the embodiment of the present application approaching a human body;

fig. 5 is a hardware structure diagram of a terminal device provided in an embodiment of the present application;

fig. 6 is a flowchart illustrating an antenna power adjustment method according to another embodiment of the present application;

fig. 7 is a flowchart illustrating an antenna power adjustment method according to another embodiment of the present application;

fig. 8 is a schematic structural diagram of an antenna power adjusting apparatus according to an embodiment of the present application;

fig. 9 is a schematic structural diagram of a terminal device to which the antenna power adjustment method provided in the embodiment of the present application is applied;

fig. 10 is a schematic software architecture diagram of a terminal device to which the antenna power adjustment method provided in the embodiment of the present application is applied.

Detailed Description

It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

It should also be understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

As used in this specification and the appended claims, the term "if" may be interpreted contextually as "when", "upon" or "in response to" determining "or" in response to detecting ". Similarly, the phrase "if it is determined" or "if a [ described condition or event ] is detected" may be interpreted contextually to mean "upon determining" or "in response to determining" or "upon detecting [ described condition or event ]" or "in response to detecting [ described condition or event ]".

Furthermore, in the description of the present application and the appended claims, the terms "first," "second," "third," and the like are used for distinguishing between descriptions and not necessarily for describing or implying relative importance.

Reference throughout this specification to "one embodiment" or "some embodiments," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," or the like, in various places throughout this specification are not necessarily all referring to the same embodiment, but rather "one or more but not all embodiments" unless specifically stated otherwise. The terms "comprising," "including," "having," and variations thereof mean "including, but not limited to," unless expressly specified otherwise.

The antenna power adjusting method provided by the embodiment of the application can be applied to terminal devices such as mobile phones, tablet computers, wearable devices, vehicle-mounted devices, notebook computers, ultra-mobile personal computers (UMPCs), netbooks, Personal Digital Assistants (PDAs), and the like, and the specific type of the terminal device is not limited at all in the embodiment of the application.

As shown in fig. 1, in order to meet the requirements of wireless communication standards of different frequency bands/systems, different antennas 101 are generally disposed at multiple positions of a terminal device. In the use process of the terminal equipment, the antennas can generate electromagnetic radiation, and when a human body is close to the terminal equipment, the generated electromagnetic radiation can affect the health of the human body. Therefore, in the using process of the terminal device, when a human body approaches the terminal device, the transmitting power of an antenna in the terminal device is generally reduced, so that the SAR is reduced, the SAR index is met, and the influence of electromagnetic radiation on human health is reduced.

In the prior art, whether a human body approaches a terminal device is generally determined by a proximity capacitive sensor or a proximity optical sensor in the terminal device, and when the human body approaches the terminal device, the transmission power of all antennas in the terminal device is reduced based on a uniform standard (i.e., a uniform SAR index). However, distances between antennas at different positions in the terminal device and the human body are different, that is, the SAR generated by the antennas at different positions are different, for example, when the terminal device is used close to the head (for example, when an earphone is used for talking), the antenna at the top of the terminal device is close to the head, the SAR generated by the head is generally large, the antenna at the bottom of the terminal device is far away from the head, the SAR generated by the head is small, and the transmission power of the top antenna and the bottom antenna is uniformly reduced indiscriminately, which may cause the communication performance of the terminal device to be reduced, and affect the communication experience of the user.

In addition, at present, for different parts of a human body close to the terminal device, the SAR generated by the terminal device has different SAR indexes, for example, a head SAR index when the head is close to the terminal device, a body SAR index when the trunk of the human body is close to the terminal device, and a limb SAR index when a limb is close to the terminal device (such as a handheld terminal device) may be provided, and the head SAR index, the body SAR index, and the limb SAR index are not the same, wherein the limb SAR index may be higher than the head SAR index and the body SAR index. In the prior art, when a human body approaches a terminal device, the transmission power of all antennas is reduced based on a unified index, so that the terminal device cannot meet a corresponding SAR index, for example, when no matter a head, a body or a hand approaches the terminal device, the transmission power of all antennas is reduced based on a four-limb SAR index, so that when the head approaches the terminal device, the terminal device cannot meet the head SAR index; or the transmission power of the antenna in the terminal device is reduced too much, which leads to the reduction of the communication performance of the terminal device and affects the communication experience of the user, for example, when the head, the body or the hand is close to the terminal device, the transmission power of all the antennas is reduced uniformly based on the head SAR index, so that when the hand is close to the terminal device, the transmission power of the antenna is reduced too much, which leads to the reduction of the communication performance of the terminal device, thereby easily causing the problems of network drop, call drop and the like.

In order to solve the above problem, an embodiment of the present application provides an antenna power adjustment method, a terminal device, and a computer-readable storage medium, which may acquire an image through a camera during a use process of the terminal device, perform image analysis to determine whether a predetermined target close to the terminal device is a head, a body, or a hand, and determine an antenna to be adjusted corresponding to the predetermined target and needing power adjustment, so as to reduce transmission power of the antenna to be adjusted according to a backoff parameter corresponding to the predetermined target, where backoff parameters corresponding to different predetermined targets are different. The method and the device for adjusting the antenna transmission power can accurately determine the type of the preset target close to the terminal device, and can accurately determine the antenna to be adjusted corresponding to the preset target, so that the transmission power of the antenna to be adjusted can be reduced based on different back-off parameters according to different preset targets, the communication performance of the terminal device is improved on the basis that the terminal device is ensured to meet SAR indexes, and the communication experience of a user is improved.

[ EXAMPLES one ]

Referring to fig. 2, fig. 2 is a schematic flowchart of an antenna power adjustment method provided in this embodiment, where the method may be applied to a terminal device, the terminal device may include a camera and a processor, and the processor may include a neural Network Processing Unit (NPU), an Application Processor (AP), and the like. As shown in fig. 2, the method may include:

s201, obtaining an image collected by a camera in the terminal equipment, and determining a preset target according to the image, wherein the preset target comprises at least one of a head, a body and a hand, and a first distance between the preset target and the terminal equipment is smaller than a first distance threshold value.

Specifically, the terminal device may include a front camera and a rear camera. In the using process of the terminal device, the front camera may collect a first image and may send the collected first image to a processor of the terminal device, such as an NPU, and the rear camera may collect a second image and may send the collected second image to the processor of the terminal device, such as an NPU. The NPU may perform image recognition and analysis and the like on the first image and/or the second image, determine whether a target such as a head, a body, a hand and the like exists in the first image and/or the second image, then determine whether the target is close to the terminal device according to whether a first distance between the target and the terminal device is smaller than a first distance threshold, and may determine the target close to the terminal device as a predetermined target. Wherein the first distance threshold value can be determined according to actual conditions.

It should be understood that the use state of the terminal device may include a head-to-head communication state, a handheld state and a placement state, the handheld state may include a handheld screen reading state and a handheld non-screen reading state, the placement state may include a screen reading state placed on the body and a non-screen reading state placed on the body, and a screen reading state placed on the object and a non-screen reading state placed on the object. In a head-on state, such as a headset call, the predetermined target near the terminal device may include the user's head; in the handheld state, the predetermined target close to the terminal device may include a hand of the user; the predetermined target close to the terminal device may include a body of the user in a screen reading state and a non-screen reading state placed on the body.

It should be noted that, when the terminal device is in a head-on state (e.g., an earpiece state), a head feature (e.g., an ear feature) local to the user may be included in the first image; when the terminal device is in a handheld screen reading state, the first image can comprise facial features of the user, and the second image can comprise surrounding environment features; when the terminal equipment is in a handheld non-screen reading state, the first image and the second image can both comprise surrounding environment characteristics; when the terminal device is in a screen reading state of being placed on a body, the first image can comprise facial features of the user, and the second image can comprise body features (such as limb outline features); when the terminal device is in a non-screen reading state of being placed on a body, the first image can comprise surrounding environment features, the second image can comprise body features (such as limb outline features), or the second image can comprise surrounding environment features, and the first image can comprise body features (such as limb outline features); when the terminal device is in a screen reading state on an object, the first image can include facial features of the user, and the second image can include object shape features and/or object material features and the like; when the terminal device is in a non-screen reading state of being placed on an object, the first image may include surrounding environment features, the second image may include object shape features and/or object material features, or the second image may include surrounding environment features, and the first image may include object shape features and/or object material features.

When the predetermined target is determined, the NPU may identify a first target feature in the first image, when the first target feature is a local head feature, a first distance between a head corresponding to the first target feature and the terminal device may be immediately determined, and if the first distance is smaller than a first distance threshold, it may be determined that the terminal device is in a head-on-head call state, that is, it is determined that the predetermined target close to the terminal device includes the head. When the first target feature is a facial feature, it can be indicated that the user is currently facing the terminal device to read the screen, and at this time, the NPU can further identify a second target feature in the second image, and when the second target feature is an environmental feature, it can be determined that the terminal device is in a handheld screen reading state, that is, it is determined that the predetermined target close to the terminal device includes a hand; when the second target feature is a body feature, a first distance between a body corresponding to the second target feature and the terminal device can be immediately determined, and if the first distance is smaller than a first distance threshold value, the terminal device can be determined to be in a screen reading state placed on the body, namely, the preset target close to the terminal device is determined to comprise the body; when the second target feature is the object shape feature or the object material feature, it may be determined that the terminal device is in a screen reading state of being placed on the object, that is, it is determined that there is no predetermined target close to the terminal device. When the first target feature is an environmental feature, the second target feature is a body feature, and meanwhile the first distance between the body corresponding to the second target feature and the terminal device is smaller than the first distance threshold, or when the first target feature is a body feature and the first distance between the body corresponding to the first target feature and the terminal device is smaller than the first distance threshold, it may be determined that the terminal device is in a non-screen reading state placed on the body, that is, it is determined that the predetermined target close to the terminal device includes the body. When the first target feature and the second target feature are both environment features, it can be determined that the terminal device is in a handheld non-screen reading state, that is, it is determined that the predetermined target close to the terminal device includes a hand. When the first target feature is an environmental feature and the second target feature is an object shape feature or an object material feature, or when the second target feature is an environmental feature and the first target feature is an object shape feature or an object material feature, it may be determined that the terminal device is in a non-screen-reading state placed on the object, that is, it is determined that there is no predetermined target close to the terminal device.

Illustratively, to accurately distinguish whether the terminal device is in the handheld screen reading state or the non-handheld screen reading state, the screen reading distance of the user during handheld screen reading and the non-handheld screen reading can be acquired in advance, and the setting of the second distance threshold value can be performed according to the screen reading distance, so that the NPU can distinguish the handheld screen reading state from the non-handheld screen reading state based on the second distance threshold value and the target feature in the image. The screen reading distance refers to the distance between the face of the user and the terminal equipment. Specifically, when the first target feature is a face feature, the NPU may determine a distance between a face corresponding to the first target feature and the terminal device. When the second target feature is an environmental feature and the distance between the face and the terminal device is smaller than or equal to a second distance threshold, determining that the terminal device is in a handheld screen reading state, namely determining that the predetermined target close to the terminal device comprises a hand; when the second target feature is a body feature and the distance between the face and the terminal device is greater than a second distance threshold, a first distance between the body corresponding to the second target feature and the terminal device can be immediately determined, and if the first distance is less than the first distance threshold, the terminal device can be determined to be in a screen reading state placed on the body, that is, the predetermined target close to the terminal device is determined to include the body.

S202, determining an antenna to be adjusted corresponding to a preset target, and reducing the transmitting power of the antenna to be adjusted according to the back-off parameter corresponding to the preset target.

It should be understood that, after determining the predetermined target close to the terminal device, the NPU may send information of the predetermined target to the AP, and the AP may further determine an antenna to be adjusted corresponding to the predetermined target, and may reduce the transmission power of the antenna to be adjusted according to the backoff parameter corresponding to the predetermined target. Specifically, the AP may determine a power adjustment value of the antenna to be adjusted according to the backoff parameter corresponding to the predetermined target and the current transmission power of the antenna to be adjusted, and may send the power adjustment value to the Modem chip, and the Modem chip may reduce the transmission power of the antenna to be adjusted according to the power adjustment value, so as to perform power backoff processing on the antenna to be adjusted, thereby satisfying the corresponding SAR index. Here, the back-off parameter corresponding to the predetermined target may be a power value at which the transmission power of the antenna needs to be reduced, or may be an upper limit value allowed by the transmission power of the antenna, or the like. The back-off parameter corresponding to the predetermined target may be determined according to an SAR indicator corresponding to the predetermined target, for example, the back-off parameter when the head is close to the terminal device may be determined according to the head SAR indicator, the back-off parameter when the body is close to the terminal device may be determined according to the body SAR indicator, and the back-off parameter when the terminal device is held in hand may be determined according to the extremity SAR.

It should be noted that, in this embodiment, the determination of the antenna to be adjusted and the power adjustment value through the AP is only schematically explained, and should not be construed as a limitation to this embodiment, in this embodiment, it is needless to say that other processors may also be used to determine the antenna to be adjusted and the power adjustment value, for example, a CoProcessor (coprocessors) may also be used to determine the antenna to be adjusted and the power adjustment value.

In one example, as shown in fig. 3, when the predetermined target includes a head, that is, when the terminal device is used near the head, the head may block part of the light emitted from the light source in the screen, and the blocked light may be reflected into the screen. Similarly, as shown in fig. 4a to 4c, when the predetermined target includes a hand, that is, when the user holds the terminal device, the hand of the user may also shield a part of the area in the screen, so that part of the light emitted by the light source in the screen is reflected into the screen after being shielded by the hand. Therefore, after determining that the predetermined target includes a head and/or a hand, the terminal device may determine an antenna to be adjusted corresponding to the predetermined target according to the light information in the screen.

As shown in fig. 5, the present embodiment may provide a light sensor and a screen driving chip in the screen of the terminal device. The light that the light source in the screen launched can reflect to light sensor after sheltering from through head or hand, and light sensor can send the light information that acquires to screen driver chip, and screen driver chip can confirm the region of sheltering from in the screen according to the light information that light sensor sent to can shelter from regional sending to AP. When determining that the predetermined target includes the head or determining that the predetermined target includes the hand, the AP may determine, according to the occlusion region, a region where the head and the terminal device are close to each other, or a region where the hand and the terminal device are close to each other. For example, the screen of the terminal device may be divided into grid regions in advance, and corresponding light sensors may be disposed in each grid region to obtain light information in each grid region, so that the occlusion region in the screen may be determined quickly.

Specifically, after the preset target is determined to comprise the head and the shielding region in the screen is determined according to the light information acquired by the light sensor, the region area and the region position of the shielding region can be immediately determined, and the first target shielding region can be acquired according to the region area and the region position, wherein the first target shielding region can be a shielding region with the region area larger than a first area threshold value and the region position being a preset position. The first area threshold value can be determined by analyzing the area of the area where the head is close to the terminal device when the user uses the terminal device close to the head. Since the head is generally close to the upper side of the terminal device when the head is close to the phone, for example, when the handset is in phone, the preset position may be set to a position near the upper edge of the terminal device or near the front camera in the screen. Here, the first target shielding area is an area where the head is close to the terminal device, that is, the first target antenna corresponding to the first target shielding area is an antenna close to the head, so that the first target antenna corresponding to the first target shielding area may be determined as an antenna to be adjusted corresponding to the head, and the transmission power of the antenna to be adjusted may be adjusted according to the back-off parameter corresponding to the head, so that the SAR of the antenna to be adjusted satisfies the head SAR index.

Specifically, as can be seen from fig. 4a to 4c, when the user holds the terminal device, the hand may form a discrete multi-point mask on the side of the screen, and/or may form a discrete single-point or multi-point mask on the middle of the screen. Therefore, after the predetermined target is determined to comprise the hand and the occlusion region in the screen is determined according to the light information acquired by the light sensor, the region area and the region position of the occlusion region can be further determined, and the second target occlusion region can be determined according to the region area and the region position. The second target shielding area may be a shielding area with an area smaller than a second area threshold, and the distribution of the area positions satisfies a preset condition. The preset condition may be a position distribution of fingers, palms, and the like in the screen when the terminal device is held by the hand, for example, the position distribution may be a single point or multiple points on the left side, the right side, and/or the middle of the screen. Here, the second target shielding area is an area where the hand and the terminal device are close to each other, and therefore, the second target antenna corresponding to the second target shielding area may be determined as the antenna to be adjusted corresponding to the hand, and the transmission power of the antenna to be adjusted may be adjusted according to the backoff parameter corresponding to the hand, so that the SAR of the antenna to be adjusted satisfies the SAR index of the hand. The second area threshold value can be determined by analyzing the contact area or the shielding area formed by the hand of the user and the screen when the user holds the terminal device, and the second area threshold value is smaller than the first area threshold value in the head.

It should be understood that the first target antenna corresponding to the first target-shielded area and the second target antenna corresponding to the second target-shielded area may be determined according to a mapping relationship between the screen area and the antennas, that is, the mapping relationship between the screen area and the antennas may be established in advance and stored in the terminal device. After the first target shielding area or the second target shielding area is determined, the terminal device may determine, according to the mapping relationship, a first target antenna corresponding to the first target shielding area or a second target antenna corresponding to the second target shielding area.

In one example, when an object is placed in close proximity to an antenna in a terminal device, the impedance of the antenna may change significantly. When the predetermined object includes a head, that is, when the terminal device is used near the head, the head generally abuts against the upper side of the terminal device, so that the impedance of the antenna to which the head abuts may be largely changed. Similarly, when a user holds a terminal device by hand, if an antenna is included in a position where the user holds the terminal device by hand, the impedance of the antenna also changes greatly. Therefore, when it is determined that the predetermined target includes the head and/or the hand, the terminal device may further determine the antenna to be adjusted corresponding to the predetermined target according to the impedance change value of each antenna.

Specifically, as shown in fig. 5, a Modem chip may be disposed in the terminal device, the Modem chip and the antenna may be connected by a radio frequency transmission line, and the Modem chip may obtain an impedance change value of each antenna in the terminal device, and may send the impedance change value of each antenna and the corresponding location information to the AP. The AP may determine a third target antenna having an impedance change value greater than a preset change threshold, and may determine an antenna to be adjusted corresponding to the predetermined target according to the position information of the third target antenna. The preset change threshold value can be determined according to actual conditions.

For example, a third target antenna located at an upper edge of the terminal device may be determined as an antenna to be adjusted corresponding to the head. For example, a third target antenna located at the left side, right side and/or lower edge of the terminal device may be determined as the antenna to be adjusted corresponding to the hand.

For example, when the predetermined target includes a head and/or a hand, the terminal device may also determine an antenna to be adjusted corresponding to the predetermined target by combining the light information in the screen and the impedance change value of the antenna. For example, when the predetermined target includes a head, a first target antenna and a third target antenna may be respectively determined according to light information in the screen and impedance change values of the antennas, and then the first target antenna and the third target antenna may be uniformly determined as antennas to be adjusted corresponding to the head; or the overlapped antenna of the first target antenna and the third target antenna may be determined as the antenna to be adjusted corresponding to the head, for example, when the antenna 1, the antenna 2, and the antenna 3 are included in the first target antenna, and the antenna 1 and the antenna 3 are included in the third target antenna, the antenna 1 and the antenna 3 may be determined as the antenna to be adjusted corresponding to the head. For example, when the predetermined target includes the head, the first target blocking area may be determined according to the light information in the screen, then the impedance change value of the first target antenna corresponding to the first target blocking area may be obtained, and the first target antenna whose impedance change value is greater than the preset change threshold may be determined as the antenna to be adjusted corresponding to the head.

It should be understood that when the terminal device is in the close-talking state, a hand-held state may also accompany. Therefore, when it is determined that the predetermined target includes the head from the first image, it may be determined whether there is a case where the terminal device is hand-held from the light information in the screen and/or the impedance change value of the antenna when it is determined that the head is an area near the terminal device from the light information in the screen and/or the impedance change value of the antenna, and when there is a case where the terminal device is hand-held, it may be determined that the area is hand-held in the terminal device. Therefore, when the predetermined target comprises a head and a hand, a first antenna to be adjusted corresponding to the head can be determined according to an area where the head is close to the terminal device, a second antenna to be adjusted corresponding to the hand can be determined according to an area where the hand is held in the terminal device, the transmission power of the first antenna to be adjusted can be adjusted according to the head SAR, so that the first antenna to be adjusted close to the head meets the head SAR index, and meanwhile, the transmission power of the second antenna to be adjusted can be adjusted according to the limb SAR, so that the second antenna to be adjusted close to the hand meets the limb SAR index.

It should be noted that, when determining the area of the head and/or the hand close to the terminal device according to the light information in the screen, if the terminal device is currently in the screen-off state, the area of the head and/or the hand close to the terminal device may be determined according to the light information acquired by the light sensor immediately before the screen is screen-off.

In one example, when the screen of the terminal device is a capacitive screen, if an object touches a certain area in the screen, the area will generate a capacitance change. When the predetermined object includes a head or a hand, that is, when the terminal device is used near the head or near the hand, the head or the hand generally contacts a partial area in the screen, so that the partial area generates a capacitance change. Therefore, the terminal device can also determine the antenna to be adjusted corresponding to the head or the hand according to the capacitance change and the change area of the screen. For example, an antenna corresponding to a change area conforming to the holding posture of the human hand may be determined as an antenna to be adjusted corresponding to the hand. For example, an antenna corresponding to a variation area near the upper side of the terminal device may be determined as an antenna to be adjusted corresponding to the head, or the like.

Similarly, when the screen of the terminal device is a resistive screen, if an object is in contact with a certain area of the screen, the area will generate a resistance change, and therefore, for the terminal device with the resistive screen, the antenna to be adjusted corresponding to the head or the hand can be determined according to the resistance change and the change area. The determination principle of the resistive screen is basically the same as that of the capacitive screen, and is not described herein again.

It should be understood that, when the predetermined target only includes the body, all antennas in the terminal device may be directly determined as the antennas to be adjusted corresponding to the body, so that the transmission power of each antenna to be adjusted may be uniformly reduced according to the backoff parameter corresponding to the body, so that the SAR of the antenna to be adjusted satisfies the SAR index of the body.

It should be noted that after the transmission power of the antenna to be adjusted is reduced, the current transmission power of each antenna in the terminal device may be obtained, and the transmission antenna of the terminal device may be switched according to the current transmission power of each antenna, so as to switch the transmission antenna of the terminal device to an antenna with higher transmission power, thereby improving the communication performance of the terminal device and improving the communication experience of the user. Illustratively, a power amplifier, a radio frequency switch, a low noise amplifier and other radio frequency devices can be connected between the Modem chip and the antenna. When the transmitting antenna needs to be switched, the AP may adjust the on-off state of the rf switch through the Modem chip to switch the transmitting antenna, or may select different rf paths through the Modem chip to switch the transmitting antenna.

It should be noted that, after the transmission power of the antenna to be adjusted is reduced, to further reduce the influence of electromagnetic radiation generated by the antenna on the user, a second distance between each antenna in the terminal device and the predetermined target may be obtained, and the transmission antenna of the terminal device may be switched according to the second distance, so as to switch the transmission antenna of the terminal device to an antenna farther from the predetermined target. For example, when the head is close to the terminal device, the transmitting antenna may be switched from an antenna located on the upper side of the terminal device close to the head to an antenna located on the lower side of the terminal device far from the head, or to an antenna on the back of the terminal device. For example, when the terminal device is held by hand, the transmitting antenna may be switched from an antenna held by hand to an antenna not held by hand.

In this embodiment, the image acquired by the camera may be acquired, and the image analysis may be performed to determine whether the predetermined target close to the terminal device is a head, a body, or a hand, and determine an antenna to be adjusted corresponding to the predetermined target and requiring power adjustment, so as to reduce the transmission power of the antenna to be adjusted according to the back-off parameter corresponding to the predetermined target, where the back-off parameters corresponding to different predetermined targets are different. That is, the present embodiment may accurately determine the type of the predetermined target close to the terminal device, and may accurately determine the antenna to be adjusted corresponding to the predetermined target, so as to reduce the transmission power of the antenna to be adjusted based on different backoff parameters according to the different predetermined targets, so as to improve the communication performance of the terminal device and improve the communication experience of the user on the basis of ensuring that the terminal device meets the SAR index.

[ example two ]

Referring to fig. 6, fig. 6 is a schematic flowchart illustrating an antenna power adjusting method according to the present embodiment. The difference between this embodiment and the first embodiment is that in this embodiment, the image collected by the camera and the light information in the screen may be acquired, and the predetermined target may be determined according to the image and the light information, so as to improve the accuracy of determining the predetermined target. The following mainly describes the different parts between the present embodiment and the first embodiment, and for the same parts, reference may be directly made to the description in the first embodiment, and details are not repeated here. As shown in fig. 6, the method may include:

s601, obtaining an image collected by a camera in the terminal equipment, wherein the image comprises a first image collected by a front camera and a second image collected by a rear camera.

S602, identifying a first target feature in the first image and a second target feature in the second image.

S603, when the first target feature is the head feature and the first distance between the head corresponding to the first target feature and the terminal device is smaller than a first distance threshold, determining that the predetermined target comprises the head.

For S601 to S603, reference may be made to the detailed description in S101, and for brevity, the description is not repeated herein.

S604, when the first target feature is the face feature, acquiring a shielding region in the screen according to the light information in the screen, and determining the region area and the region position of the shielding region.

And S605, if the area of the region is smaller than the second area threshold value and the distribution of the positions of the region meets a first preset condition, determining that the preset target comprises a hand.

It should be understood that when the first target feature is a facial feature, it indicates that the user is reading the screen from the front, i.e. the terminal device is in a screen reading state, and the screen reading state may include a handheld screen reading state, a screen reading state placed on the body, and a screen reading state placed on an object. When the terminal equipment is in a handheld screen reading state, the hand of a user can shield partial areas in the screen, so that light rays emitted by a partial light source in the screen are reflected to the light ray sensor in the screen after being shielded by the hand. Therefore, the shielding area in the screen can be determined according to the light information acquired by the light sensor so as to determine whether the terminal device is in a handheld screen reading state.

Specifically, when the terminal device is in a handheld screen reading state, the hand can form discrete multi-point shielding on the side of the screen, and/or can form discrete single-point or multi-point shielding on the middle of the screen. Therefore, the light ray information in the screen can be acquired through the light ray sensor, the shielding region in the screen is determined according to the light ray information, the region area and the region position of the shielding region are determined, and whether the terminal device is in the handheld screen reading state or not is determined according to the region area and the region position. Here, when there is an area smaller than the second area threshold and the area position distribution of the areas smaller than the second area threshold satisfies the first preset condition, it may be determined that the terminal device is in a handheld screen reading state, that is, the predetermined target close to the terminal device includes a hand. The first preset condition may be the same as the preset condition described in the first embodiment, that is, the first preset condition may be a position distribution of fingers, palms, and the like in the screen when the terminal device is held by the hand, for example, the position distribution may be a position distribution of a single point or multiple points on the left side, the right side, and/or the middle of the screen.

And S606, if the area of the region is larger than or equal to the second area threshold, or the distribution of the positions of the region does not meet the first preset condition, and the second target feature is a body feature, determining that the preset target comprises a body.

Here, when the area of the shielding region is greater than or equal to the second area threshold, or the distribution of the region positions does not satisfy the first preset condition, it may be determined that the light information acquired by the light sensor is not reflected by the hand shielding, that is, it may be determined that the terminal device is not in the handheld screen reading state. At this time, whether the terminal device is in the screen reading state of being placed on the body or the screen reading state of being placed on the object can be determined according to the second target characteristics in the second image acquired by the rear camera.

It should be understood that when the terminal device is in the screen reading state of being placed on the body, the second image acquired by the rear camera can include the body features (such as the limb outline features) of the user. Therefore, when the second target feature is a body feature of the user, it may be determined that the terminal device is in a screen reading state of being placed on the body, and it may be determined that the predetermined target close to the terminal device includes the body of the user. And when the second target feature is not the physical feature of the user, for example, the second target feature is the object shape feature and/or the object material feature, it may be determined that the terminal device is in a screen reading state on the object, that is, it is determined that there is no predetermined target close to the terminal device, and at this time, the antenna in the terminal device may not be adjusted in transmission power.

S607, when the first target feature is an environmental feature, the second target feature is a physical feature, and a first distance between a body corresponding to the second target feature and the terminal device is smaller than a first distance threshold, or when the first target feature is a physical feature and a first distance between a body corresponding to the first target feature and the terminal device is smaller than a first distance threshold, determining that the predetermined target includes the body.

And S608, when the first target feature and the second target feature are both environmental features, determining that the preset target comprises a hand.

For S607 and S608, reference may be made to the detailed description in S101, and for brevity, the description is not repeated here.

In the embodiment, the image acquired by the camera and the light information in the screen can be acquired, the predetermined target can be determined according to the image and the light information, the accuracy of determining the predetermined target can be improved, and the adjustment accuracy of the transmitting power of the antenna to be adjusted is improved.

[ EXAMPLE III ]

Referring to fig. 7, fig. 7 is a schematic flowchart illustrating an antenna power adjusting method according to the present embodiment. The difference between this embodiment and the first embodiment is that, in this embodiment, an image acquired by a camera and an impedance change value of each antenna in the terminal device may be acquired, and a predetermined target may be determined according to the image and the impedance change value, so as to improve accuracy of determining the predetermined target. The following mainly describes the different parts between the present embodiment and the first embodiment, and for the same parts, reference may be directly made to the description in the first embodiment, and details are not repeated here. As shown in fig. 7, the method may include:

s701, obtaining images collected by a camera in the terminal equipment, wherein the images comprise a first image collected by a front camera and a second image collected by a rear camera.

S702, identifying a first target feature in the first image and a second target feature in the second image.

S703, when the first target feature is the head feature and the first distance between the head corresponding to the first target feature and the terminal device is smaller than a first distance threshold, determining that the predetermined target comprises the head.

For S701 to S703, reference may be made to the detailed description in S101, and for brevity, the description is not repeated herein.

S704, when the first target feature is the face feature, determining a target antenna according to the impedance change value of each antenna in the terminal device, wherein the target antenna is an antenna of which the impedance change value is larger than a preset change threshold value.

S705, if the position distribution of the target antenna meets a second preset condition, determining that the preset target comprises a hand.

It should be understood that when the first target feature is a facial feature, it indicates that the user is reading the screen from the front, i.e. the terminal device is in a screen reading state, and the screen reading state may include a handheld screen reading state, a screen reading state placed on the body, and a screen reading state placed on an object. When the terminal device is in a handheld screen reading state, a hand of a user generally contacts a partial area of the terminal device, so that impedance of an antenna corresponding to the partial area is greatly changed. Therefore, the terminal device can determine the area of the hand-held terminal device according to the impedance change value of each antenna so as to determine whether the terminal device is in the hand-held screen reading state. Specifically, a target antenna with an impedance change value larger than a preset change threshold value in the terminal device can be determined, position information of the target antenna is obtained, and when it is determined according to the position information that the position distribution of the target antenna meets a second preset condition, it can be determined that the terminal device is in a handheld screen reading state, that is, it is determined that a preset target close to the terminal device includes a hand. The second preset condition may be the position distribution of the hand-held antenna when the hand holds the terminal device.

S706, if the position distribution of the target antenna does not meet a second preset condition and the second target characteristic is a body characteristic, determining that the preset target comprises a body.

Here, when the position distribution of the target antenna does not satisfy the second preset condition, it may be determined that the impedance change value of the antenna in the terminal device is not generated when the terminal device is held by a hand, that is, it may be determined that the terminal device is not in a handheld screen reading state. At this time, whether the terminal device is in the screen reading state placed on the body or the screen reading state placed on the object can be determined according to the second target feature in the second image acquired by the rear camera.

And S707, when the first target feature is an environmental feature, the second target feature is a body feature, and the first distance between the body corresponding to the second target feature and the terminal device is smaller than a first distance threshold, or when the first target feature is a body feature and the first distance between the body corresponding to the first target feature and the terminal device is smaller than the first distance threshold, determining that the predetermined target includes the body.

And S708, when the first target feature and the second target feature are both environmental features, determining that the preset target comprises a hand.

For S707 and S708, reference may be made to the detailed description in S101, and for brevity, detailed description is omitted here.

In this embodiment, the image acquired by the camera and the impedance change value of each antenna in the terminal device may be acquired, and the predetermined target may be determined according to the image and the impedance change value, so that the accuracy of determining the predetermined target may be improved, and the accuracy of adjusting the transmitting power of the antenna to be adjusted may be improved.

In one example, the embodiment of the present application may also determine the predetermined target by combining the light information in the screen, the impedance change value of each antenna, and the image. For example, when the first target feature is a face feature, the terminal device may obtain a shielding region in the screen according to light information in the screen, and may determine a region area and a region position of the shielding region, and may determine the target antenna according to an impedance change value of each antenna in the terminal device, and when the region area is smaller than a second area threshold, and the distribution of the region positions satisfies a first preset condition, and the distribution of the positions of the target antenna satisfies a second preset condition, it is determined that the preset target includes a hand.

It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

Fig. 8 shows a block diagram of the antenna power adjusting apparatus provided in the embodiment of the present application, corresponding to the antenna power adjusting method described in the foregoing embodiment, and only the relevant parts to the embodiment of the present application are shown for convenience of description.

Referring to fig. 8, the apparatus may be applied to a terminal device, and may include:

a predetermined target determining module 801, configured to obtain an image acquired by a camera in the terminal device, and determine a predetermined target according to the image, where the predetermined target includes at least one of a head, a body, and a hand, and a first distance between the predetermined target and the terminal device is smaller than a first distance threshold;

an antenna power adjusting module 802, configured to determine an antenna to be adjusted corresponding to the predetermined target, and reduce the transmission power of the antenna to be adjusted according to the backoff parameter corresponding to the predetermined target.

Illustratively, the images include a first image captured by a front camera and a second image captured by a rear camera, and the predetermined target determination module 801 may include:

In a possible implementation manner of the second aspect, the images include a first image captured by a front camera and a second image captured by a rear camera, and the predetermined target determining module 801 may include:

Illustratively, the antenna power adjustment module 802 may include:

It should be noted that, for the information interaction, execution process, and other contents between the above-mentioned devices/units, the specific functions and technical effects thereof are based on the same concept as those of the embodiment of the method of the present application, and specific reference may be made to the part of the embodiment of the method, which is not described herein again.

It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

Referring to fig. 9, fig. 9 is a schematic structural diagram of a terminal device according to an embodiment of the present application.

The terminal device 100 may include a processor 110, an external memory interface 120, an internal memory 121, a Universal Serial Bus (USB) interface 130, a charging management module 140, a power management module 141, a battery 142, an antenna 1, an antenna 2, a mobile communication module 150, a wireless communication module 160, an audio module 170, a speaker 170A, a receiver 170B, a microphone 170C, an earphone interface 170D, a sensor module 180, a key 190, a motor 191, an indicator 192, a camera 193, a display screen 194, a Subscriber Identification Module (SIM) card interface 195, and the like. The sensor module 180 may include a pressure sensor 180A, a gyroscope sensor 180B, an air pressure sensor 180C, a magnetic sensor 180D, an acceleration sensor 180E, a distance sensor 180F, a proximity light sensor 180G, a fingerprint sensor 180H, a temperature sensor 180J, a touch sensor 180K, an ambient light sensor 180L, a bone conduction sensor 180M, and the like.

It is to be understood that the illustrated structure of the embodiment of the present application does not constitute a specific limitation to the terminal device 100. In other embodiments of the present application, terminal device 100 may include more or fewer components than shown, or some components may be combined, some components may be split, or a different arrangement of components. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

Processor 110 may include one or more processing units, such as: the processor 110 may include an Application Processor (AP), a modem processor, a Graphics Processing Unit (GPU), an Image Signal Processor (ISP), a controller, a video codec, a Digital Signal Processor (DSP), a baseband processor, and/or a neural-Network Processing Unit (NPU), etc. The different processing units may be separate devices or may be integrated into one or more processors.

The controller can generate an operation control signal according to the instruction operation code and the timing signal to complete the control of instruction fetching and instruction execution.

A memory may also be provided in processor 110 for storing instructions and data. In some embodiments, the memory in the processor 110 is a cache memory. The memory may hold instructions or data that have just been used or recycled by the processor 110. If the processor 110 needs to reuse the instruction or data, it can be called directly from the memory. Avoiding repeated accesses reduces the latency of the processor 110, thereby increasing the efficiency of the system.

In some embodiments, processor 110 may include one or more interfaces. The interface may include an integrated circuit (I2C) interface, an integrated circuit built-in audio (I2S) interface, a Pulse Code Modulation (PCM) interface, a universal asynchronous receiver/transmitter (UART) interface, a Mobile Industry Processor Interface (MIPI), a general-purpose input/output (GPIO) interface, a Subscriber Identity Module (SIM) interface, and/or a Universal Serial Bus (USB) interface, etc.

The I2C interface is a bi-directional synchronous serial bus that includes a serial data line (SDA) and a Serial Clock Line (SCL). In some embodiments, processor 110 may include multiple sets of I2C buses. The processor 110 may be coupled to the touch sensor 180K, the charger, the flash, the camera 193, etc. through different I2C bus interfaces, respectively. For example: the processor 110 may be coupled to the touch sensor 180K through an I2C interface, so that the processor 110 and the touch sensor 180K communicate through an I2C bus interface to implement the touch function of the terminal device 100.

The I2S interface may be used for audio communication. In some embodiments, processor 110 may include multiple sets of I2S buses. The processor 110 may be coupled to the audio module 170 via an I2S bus to enable communication between the processor 110 and the audio module 170. In some embodiments, the audio module 170 may communicate audio signals to the wireless communication module 160 via the I2S interface, enabling answering of calls via a bluetooth headset.

The PCM interface may also be used for audio communication, sampling, quantizing and encoding analog signals. In some embodiments, the audio module 170 and the wireless communication module 160 may be coupled by a PCM bus interface. In some embodiments, the audio module 170 may also transmit audio signals to the wireless communication module 160 through the PCM interface, so as to implement a function of answering a call through a bluetooth headset. Both the I2S interface and the PCM interface may be used for audio communication.

The UART interface is a universal serial data bus used for asynchronous communications. The bus may be a bidirectional communication bus. It converts the data to be transmitted between serial communication and parallel communication. In some embodiments, a UART interface is generally used to connect the processor 110 with the wireless communication module 160. For example: the processor 110 communicates with a bluetooth module in the wireless communication module 160 through a UART interface to implement a bluetooth function. In some embodiments, the audio module 170 may transmit the audio signal to the wireless communication module 160 through a UART interface, so as to realize the function of playing music through a bluetooth headset.

MIPI interfaces may be used to connect processor 110 with peripheral devices such as display screen 194, camera 193, and the like. The MIPI interface includes a Camera Serial Interface (CSI), a Display Serial Interface (DSI), and the like. In some embodiments, processor 110 and camera 193 communicate through a CSI interface to implement the capture function of terminal device 100. The processor 110 and the display screen 194 communicate through the DSI interface to implement the display function of the terminal device 100.

The GPIO interface may be configured by software. The GPIO interface may be configured as a control signal and may also be configured as a data signal. In some embodiments, a GPIO interface may be used to connect the processor 110 with the camera 193, the display 194, the wireless communication module 160, the audio module 170, the sensor module 180, and the like. The GPIO interface may also be configured as an I2C interface, an I2S interface, a UART interface, a MIPI interface, and the like.

The USB interface 130 is an interface conforming to the USB standard specification, and may specifically be a Mini USB interface, a Micro USB interface, a USB Type C interface, or the like. The USB interface 130 may be used to connect a charger to charge the terminal device 100, and may also be used to transmit data between the terminal device 100 and a peripheral device. And the earphone can also be used for connecting an earphone and playing audio through the earphone. The interface may also be used to connect other terminal devices, such as AR devices and the like.

It should be understood that the interface connection relationship between the modules illustrated in the embodiment of the present application is only an exemplary illustration, and does not constitute a limitation on the structure of the terminal device 100. In other embodiments of the present application, the terminal device 100 may also adopt different interface connection manners or a combination of multiple interface connection manners in the above embodiments.

The charging management module 140 is configured to receive charging input from a charger. The charger may be a wireless charger or a wired charger. In some wired charging embodiments, the charging management module 140 may receive charging input from a wired charger via the USB interface 130. In some wireless charging embodiments, the charging management module 140 may receive a wireless charging input through a wireless charging coil of the terminal device 100. The charging management module 140 may also supply power to the terminal device through the power management module 141 while charging the battery 142.

The power management module 141 is used to connect the battery 142, the charging management module 140 and the processor 110. The power management module 141 receives input from the battery 142 and/or the charge management module 140, and supplies power to the processor 110, the internal memory 121, the display 194, the camera 193, the wireless communication module 160, and the like. The power management module 141 may also be used to monitor parameters such as battery capacity, battery cycle count, battery state of health (leakage, impedance), etc. In some other embodiments, the power management module 141 may also be disposed in the processor 110. In other embodiments, the power management module 141 and the charging management module 140 may be disposed in the same device.

The wireless communication function of the terminal device 100 may be implemented by the antenna 1, the antenna 2, the mobile communication module 150, the wireless communication module 160, a modem processor, a baseband processor, and the like.

The antennas 1 and 2 are used for transmitting and receiving electromagnetic wave signals. Each antenna in terminal device 100 may be used to cover a single or multiple communication bands. Different antennas can also be multiplexed to improve the utilization of the antennas. For example: the antenna 1 may be multiplexed as a diversity antenna of a wireless local area network. In other embodiments, the antenna may be used in conjunction with a tuning switch.

The mobile communication module 150 may provide a solution including 2G/3G/4G/5G wireless communication applied on the terminal device 100. The mobile communication module 150 may include at least one filter, a switch, a power amplifier, a Low Noise Amplifier (LNA), and the like. The mobile communication module 150 may receive the electromagnetic wave from the antenna 1, filter, amplify, etc. the received electromagnetic wave, and transmit the electromagnetic wave to the modem processor for demodulation. The mobile communication module 150 may also amplify the signal modulated by the modem processor, and convert the signal into electromagnetic wave through the antenna 1 to radiate the electromagnetic wave. In some embodiments, at least some of the functional modules of the mobile communication module 150 may be disposed in the processor 110. In some embodiments, at least some of the functional modules of the mobile communication module 150 may be disposed in the same device as at least some of the modules of the processor 110.

The modem processor may include a modulator and a demodulator. The modulator is used for modulating a low-frequency baseband signal to be transmitted into a medium-high frequency signal. The demodulator is used for demodulating the received electromagnetic wave signal into a low-frequency baseband signal. The demodulator then passes the demodulated low frequency baseband signal to a baseband processor for processing. The low frequency baseband signal is processed by the baseband processor and then transferred to the application processor. The application processor outputs a sound signal through an audio device (not limited to the speaker 170A, the receiver 170B, etc.) or displays an image or video through the display screen 194. In some embodiments, the modem processor may be a stand-alone device. In other embodiments, the modem processor may be provided in the same device as the mobile communication module 150 or other functional modules, independent of the processor 110.

The wireless communication module 160 may provide a solution for wireless communication applied to the terminal device 100, including Wireless Local Area Networks (WLANs) (e.g., wireless fidelity (Wi-Fi) networks), bluetooth (bluetooth, BT), Global Navigation Satellite System (GNSS), Frequency Modulation (FM), Near Field Communication (NFC), Infrared (IR), and the like. The wireless communication module 160 may be one or more devices integrating at least one communication processing module. The wireless communication module 160 receives electromagnetic waves via the antenna 2, performs frequency modulation and filtering processing on electromagnetic wave signals, and transmits the processed signals to the processor 110. The wireless communication module 160 may also receive a signal to be transmitted from the processor 110, perform frequency modulation and amplification on the signal, and convert the signal into electromagnetic waves through the antenna 2 to radiate the electromagnetic waves.

In some embodiments, the antenna 1 of the terminal device 100 is coupled to the mobile communication module 150 and the antenna 2 is coupled to the wireless communication module 160 so that the terminal device 100 can communicate with the network and other devices through wireless communication technology. The wireless communication technology may include global system for mobile communications (GSM), General Packet Radio Service (GPRS), code division multiple access (code division multiple access, CDMA), Wideband Code Division Multiple Access (WCDMA), time-division code division multiple access (time-division code division multiple access, TD-SCDMA), Long Term Evolution (LTE), LTE, BT, GNSS, WLAN, NFC, FM, and/or IR technologies, etc. The GNSS may include a Global Positioning System (GPS), a global navigation satellite system (GLONASS), a beidou navigation satellite system (BDS), a quasi-zenith satellite system (QZSS), and/or a Satellite Based Augmentation System (SBAS).

The terminal device 100 implements a display function by the GPU, the display screen 194, and the application processor. The GPU is a microprocessor for image processing, and is connected to the display screen 194 and an application processor. The GPU is used to perform mathematical and geometric calculations for graphics rendering. The processor 110 may include one or more GPUs that execute program instructions to generate or alter display information.

The display screen 194 is used to display images, video, and the like. The display screen 194 includes a display panel. The display panel may adopt a Liquid Crystal Display (LCD), an organic light-emitting diode (OLED), an active-matrix organic light-emitting diode (active-matrix organic light-emitting diode, AMOLED), a flexible light-emitting diode (FLED), a miniature, a Micro-oeld, a quantum dot light-emitting diode (QLED), and the like. In some embodiments, the terminal device 100 may include 1 or N display screens 194, where N is a positive integer greater than 1.

The terminal device 100 may implement a shooting function through the ISP, the camera 193, the video codec, the GPU, the display screen 194, the application processor, and the like.

The ISP is used to process the data fed back by the camera 193. For example, when a photo is taken, the shutter is opened, light is transmitted to the camera photosensitive element through the lens, the optical signal is converted into an electrical signal, and the camera photosensitive element transmits the electrical signal to the ISP for processing and converting into an image visible to naked eyes. The ISP can also carry out algorithm optimization on the noise, brightness and skin color of the image. The ISP can also optimize parameters such as exposure, color temperature and the like of a shooting scene. In some embodiments, the ISP may be provided in camera 193.

The camera 193 is used to capture still images or video. The object generates an optical image through the lens and projects the optical image to the photosensitive element. The photosensitive element may be a Charge Coupled Device (CCD) or a complementary metal-oxide-semiconductor (CMOS) phototransistor. The light sensing element converts the optical signal into an electrical signal, which is then passed to the ISP where it is converted into a digital image signal. And the ISP outputs the digital image signal to the DSP for processing. The DSP converts the digital image signal into image signal in standard RGB, YUV and other formats. In some embodiments, the terminal device 100 may include 1 or N cameras 193, N being a positive integer greater than 1.

The digital signal processor is used for processing digital signals, and can process digital image signals and other digital signals. For example, when the terminal device 100 selects a frequency point, the digital signal processor is used to perform fourier transform or the like on the frequency point energy.

Video codecs are used to compress or decompress digital video. The terminal device 100 may support one or more video codecs. In this way, the terminal device 100 can play or record video in a plurality of encoding formats, such as: moving Picture Experts Group (MPEG) 1, MPEG2, MPEG3, MPEG4, and the like.

The NPU is a neural-network (NN) computing processor that processes input information quickly by using a biological neural network structure, for example, by using a transfer mode between neurons of a human brain, and can also learn by itself continuously. The NPU can implement applications such as intelligent recognition of the terminal device 100, for example: image recognition, face recognition, speech recognition, text understanding, and the like.

The external memory interface 120 may be used to connect an external memory card, such as a Micro SD card, to extend the storage capability of the terminal device 100. The external memory card communicates with the processor 110 through the external memory interface 120 to implement a data storage function. For example, files such as music, video, etc. are saved in an external memory card.

The internal memory 121 may be used to store computer-executable program code, which includes instructions. The internal memory 121 may include a program storage area and a data storage area. The storage program area may store an operating system, an application program (such as a sound playing function, an image playing function, etc.) required by at least one function, and the like. The storage data area may store data (such as audio data, a phonebook, etc.) created during use of the terminal device 100, and the like. In addition, the internal memory 121 may include a high-speed random access memory, and may further include a nonvolatile memory, such as at least one magnetic disk storage device, a flash memory device, a universal flash memory (UFS), and the like. The processor 110 executes various functional applications of the terminal device 100 and data processing by executing instructions stored in the internal memory 121 and/or instructions stored in a memory provided in the processor.

The terminal device 100 may implement an audio function through the audio module 170, the speaker 170A, the receiver 170B, the microphone 170C, the earphone interface 170D, and the application processor. Such as music playing, recording, etc.

The audio module 170 is used to convert digital audio information into an analog audio signal output and also to convert an analog audio input into a digital audio signal. The audio module 170 may also be used to encode and decode audio signals. In some embodiments, the audio module 170 may be disposed in the processor 110, or some functional modules of the audio module 170 may be disposed in the processor 110.

The speaker 170A, also called a "horn", is used to convert the audio electrical signal into an acoustic signal. The terminal device 100 can listen to music through the speaker 170A, or listen to a handsfree call.

The receiver 170B, also called "earpiece", is used to convert the electrical audio signal into an acoustic signal. When the terminal device 100 answers a call or voice information, it is possible to answer a voice by bringing the receiver 170B close to the human ear.

The microphone 170C, also referred to as a "microphone," is used to convert sound signals into electrical signals. When making a call or transmitting voice information, the user can input a voice signal to the microphone 170C by speaking the user's mouth near the microphone 170C. The terminal device 100 may be provided with at least one microphone 170C. In other embodiments, the terminal device 100 may be provided with two microphones 170C, which may implement a noise reduction function in addition to collecting sound signals. In other embodiments, the terminal device 100 may further include three, four or more microphones 170C to collect sound signals, reduce noise, identify sound sources, and implement directional recording functions.

The headphone interface 170D is used to connect a wired headphone. The headset interface 170D may be the USB interface 130, or may be an Open Mobile Terminal Platform (OMTP) standard interface of 3.5mm, or a cellular telecommunications industry association (cellular telecommunications industry association of the USA, CTIA) standard interface.

The pressure sensor 180A is used for sensing a pressure signal, and converting the pressure signal into an electrical signal. In some embodiments, the pressure sensor 180A may be disposed on the display screen 194. The pressure sensor 180A can be of a wide variety, such as a resistive pressure sensor, an inductive pressure sensor, a capacitive pressure sensor, and the like. The capacitive pressure sensor may be a sensor comprising at least two parallel plates having an electrically conductive material. When a force acts on the pressure sensor 180A, the capacitance between the electrodes changes. The terminal device 100 determines the intensity of the pressure from the change in the capacitance. When a touch operation is applied to the display screen 194, the terminal device 100 detects the intensity of the touch operation based on the pressure sensor 180A. The terminal device 100 may also calculate the touched position from the detection signal of the pressure sensor 180A. In some embodiments, the touch operations that are applied to the same touch position but different touch operation intensities may correspond to different operation instructions. For example: and when the touch operation with the touch operation intensity smaller than the first pressure threshold value acts on the short message application icon, executing an instruction for viewing the short message. And when the touch operation with the touch operation intensity larger than or equal to the first pressure threshold value acts on the short message application icon, executing an instruction of newly building the short message.

The gyro sensor 180B may be used to determine the motion attitude of the terminal device 100. In some embodiments, the angular velocity of terminal device 100 about three axes (i.e., x, y, and z axes) may be determined by gyroscope sensor 180B. The gyro sensor 180B may be used for photographing anti-shake. Illustratively, when the shutter is pressed, the gyro sensor 180B detects the shake angle of the terminal device 100, calculates the distance to be compensated for by the lens module according to the shake angle, and allows the lens to counteract the shake of the terminal device 100 through a reverse movement, thereby achieving anti-shake. The gyroscope sensor 180B may also be used for navigation, somatosensory gaming scenes.

The air pressure sensor 180C is used to measure air pressure. In some embodiments, the terminal device 100 calculates an altitude from the barometric pressure measured by the barometric pressure sensor 180C, and assists in positioning and navigation.

The magnetic sensor 180D includes a hall sensor. The terminal device 100 may detect the opening and closing of the flip holster using the magnetic sensor 180D. In some embodiments, when the terminal device 100 is a folder, the terminal device 100 may detect the opening and closing of the folder according to the magnetic sensor 180D. And then according to the opening and closing state of the leather sheath or the opening and closing state of the flip cover, the automatic unlocking of the flip cover is set.

The acceleration sensor 180E can detect the magnitude of acceleration of the terminal device 100 in various directions (generally, three axes). The magnitude and direction of gravity can be detected when the terminal device 100 is stationary. The method can also be used for recognizing the posture of the terminal equipment, and is applied to horizontal and vertical screen switching, pedometers and other applications.

A distance sensor 180F for measuring a distance. The terminal device 100 may measure the distance by infrared or laser. In some embodiments, shooting a scene, the terminal device 100 may range using the distance sensor 180F to achieve fast focus.

The proximity light sensor 180G may include, for example, a Light Emitting Diode (LED) and a light detector, such as a photodiode. The light emitting diode may be an infrared light emitting diode. The terminal device 100 emits infrared light to the outside through the light emitting diode. The terminal device 100 detects infrared reflected light from a nearby object using a photodiode. When sufficient reflected light is detected, it can be determined that there is an object near the terminal device 100. When insufficient reflected light is detected, the terminal device 100 can determine that there is no object near the terminal device 100. The terminal device 100 can utilize the proximity light sensor 180G to detect that the user holds the terminal device 100 close to the ear for talking, so as to automatically turn off the screen to achieve the purpose of saving power. The proximity light sensor 180G may also be used in a holster mode, a pocket mode automatically unlocks and locks the screen.

The ambient light sensor 180L is used to sense the ambient light level. The terminal device 100 may adaptively adjust the brightness of the display screen 194 according to the perceived ambient light level. The ambient light sensor 180L may also be used to automatically adjust the white balance when taking a picture. The ambient light sensor 180L may also cooperate with the proximity light sensor 180G to detect whether the terminal device 100 is in a pocket, in order to prevent accidental touches.

The fingerprint sensor 180H is used to collect a fingerprint. The terminal device 100 can utilize the collected fingerprint characteristics to realize fingerprint unlocking, access to an application lock, fingerprint photographing, fingerprint incoming call answering and the like.

The temperature sensor 180J is used to detect temperature. In some embodiments, the terminal device 100 executes a temperature processing policy using the temperature detected by the temperature sensor 180J. For example, when the temperature reported by the temperature sensor 180J exceeds the threshold, the terminal device 100 performs a reduction in performance of a processor located near the temperature sensor 180J, so as to reduce power consumption and implement thermal protection. In other embodiments, the terminal device 100 heats the battery 142 when the temperature is below another threshold to avoid the terminal device 100 being abnormally shut down due to low temperature. In other embodiments, when the temperature is lower than a further threshold, the terminal device 100 performs boosting on the output voltage of the battery 142 to avoid abnormal shutdown due to low temperature.

The touch sensor 180K is also called a "touch device". The touch sensor 180K may be disposed on the display screen 194, and the touch sensor 180K and the display screen 194 form a touch screen, which is also called a "touch screen". The touch sensor 180K is used to detect a touch operation applied thereto or nearby. The touch sensor can communicate the detected touch operation to the application processor to determine the touch event type. Visual output associated with the touch operation may be provided through the display screen 194. In other embodiments, the touch sensor 180K may be disposed on the surface of the terminal device 100, different from the position of the display screen 194.

The bone conduction sensor 180M may acquire a vibration signal. In some embodiments, the bone conduction sensor 180M may acquire a vibration signal of the human vocal part vibrating the bone mass. The bone conduction sensor 180M may also contact the human pulse to receive the blood pressure pulsation signal. In some embodiments, the bone conduction sensor 180M may also be disposed in a headset, integrated into a bone conduction headset. The audio module 170 may analyze a voice signal based on the vibration signal of the bone mass vibrated by the sound part acquired by the bone conduction sensor 180M, so as to implement a voice function. The application processor can analyze heart rate information based on the blood pressure beating signal acquired by the bone conduction sensor 180M, so as to realize the heart rate detection function.

The keys 190 include a power-on key, a volume key, and the like. The keys 190 may be mechanical keys. Or may be touch keys. The terminal device 100 may receive a key input, and generate a key signal input related to user setting and function control of the terminal device 100.

The motor 191 may generate a vibration cue. The motor 191 may be used for incoming call vibration cues, as well as for touch vibration feedback. For example, touch operations applied to different applications (e.g., photographing, audio playing, etc.) may correspond to different vibration feedback effects. The motor 191 may also respond to different vibration feedback effects for touch operations applied to different areas of the display screen 194. Different application scenes (such as time reminding, receiving information, alarm clock, game and the like) can also correspond to different vibration feedback effects. The touch vibration feedback effect may also support customization.

Indicator 192 may be an indicator light that may be used to indicate a state of charge, a change in charge, or a message, missed call, notification, etc.

The SIM card interface 195 is used to connect a SIM card. The SIM card can be brought into and out of contact with the terminal device 100 by being inserted into the SIM card interface 195 or being pulled out of the SIM card interface 195. The terminal device 100 may support 1 or N SIM card interfaces, where N is a positive integer greater than 1. The SIM card interface 195 may support a Nano SIM card, a Micro SIM card, a SIM card, etc. The same SIM card interface 195 can be inserted with multiple cards at the same time. The types of the plurality of cards may be the same or different. The SIM card interface 195 may also be compatible with different types of SIM cards. The SIM card interface 195 may also be compatible with external memory cards. The terminal device 100 interacts with the network through the SIM card to implement functions such as communication and data communication. In some embodiments, the terminal device 100 employs eSIM, namely: an embedded SIM card. The eSIM card may be embedded in the terminal device 100 and cannot be separated from the terminal device 100.

The software system of the terminal device 100 may adopt a hierarchical architecture, an event-driven architecture, a micro-core architecture, a micro-service architecture, or a cloud architecture. The embodiment of the present application takes an Android system with a layered architecture as an example, and exemplarily illustrates a software structure of the terminal device 100.

Fig. 10 is a block diagram of a software configuration of the terminal device 100 according to the embodiment of the present application.

The layered architecture divides the software into several layers, each layer having a clear role and division of labor. The layers communicate with each other through a software interface. In some embodiments, the Android system is divided into four layers, an application layer, an application framework layer, an Android runtime (Android runtime) and system library, and a kernel layer from top to bottom.

The application layer may include a series of application packages.

As shown in fig. 10, the application package may include camera, gallery, calendar, phone call, map, navigation, WLAN, bluetooth, music, video, short message, etc. applications.

The application framework layer provides an Application Programming Interface (API) and a programming framework for the application program of the application layer. The application framework layer includes a number of predefined functions.

As shown in FIG. 10, the application framework layers may include a window manager, content provider, view system, phone manager, resource manager, notification manager, and the like.

The window manager is used for managing window programs. The window manager can obtain the size of the display screen, judge whether a status bar exists, lock the screen, intercept the screen and the like.

The content provider is used to store and retrieve data and make it accessible to applications. The data may include video, images, audio, calls made and received, browsing history and bookmarks, phone books, etc.

The view system includes visual controls such as controls to display text, controls to display pictures, and the like. The view system may be used to build applications. The display interface may be composed of one or more views. For example, the display interface including the short message notification icon may include a view for displaying text and a view for displaying pictures.

The phone manager is used to provide the communication function of the terminal device 100. Such as management of call status (including on, off, etc.).

The resource manager provides various resources for the application, such as localized strings, icons, pictures, layout files, video files, and the like.

The notification manager enables the application to display notification information in the status bar, can be used to convey notification-type messages, can disappear automatically after a short dwell, and does not require user interaction. Such as a notification manager used to inform download completion, message alerts, etc. The notification manager may also be a notification that appears in the form of a chart or scroll bar text at the top status bar of the system, such as a notification of a background running application, or a notification that appears on the screen in the form of a dialog window. For example, text information is prompted in the status bar, a prompt tone is given, the terminal device vibrates, an indicator light flickers, and the like.

The Android Runtime comprises a core library and a virtual machine. The Android runtime is responsible for scheduling and managing an Android system.

The core library comprises two parts: one part is a function which needs to be called by java language, and the other part is a core library of android.

The application layer and the application framework layer run in a virtual machine. And executing java files of the application program layer and the application program framework layer into a binary file by the virtual machine. The virtual machine is used for performing the functions of object life cycle management, stack management, thread management, safety and exception management, garbage collection and the like.

The system library may include a plurality of functional modules. For example: surface managers (surface managers), Media Libraries (Media Libraries), three-dimensional graphics processing Libraries (e.g., OpenGL ES), 2D graphics engines (e.g., SGL), and the like.

The surface manager is used to manage the display subsystem and provide fusion of 2D and 3D layers for multiple applications.

The media library supports a variety of commonly used audio, video format playback and recording, and still image files, among others. The media library may support a variety of audio-video encoding formats, such as: MPEG4, H.264, MP3, AAC, AMR, JPG, PNG, etc.

The three-dimensional graphic processing library is used for realizing three-dimensional graphic drawing, image rendering, synthesis, layer processing and the like.

The 2D graphics engine is a drawing engine for 2D drawing.

The kernel layer is a layer between hardware and software. The inner core layer at least comprises a display driver, a camera driver, an audio driver and a sensor driver.

The following describes exemplary workflow of the software and hardware of the terminal device 100 in connection with capturing a photo scene.

When the touch sensor 180K receives a touch operation, a corresponding hardware interrupt is issued to the kernel layer. The kernel layer processes the touch operation into an original input event (including touch coordinates, a time stamp of the touch operation, and other information). The raw input events are stored at the kernel layer. And the application program framework layer acquires the original input event from the kernel layer and identifies the control corresponding to the input event. Taking the touch operation as a touch click operation, and taking a control corresponding to the click operation as a control of a camera application icon as an example, the camera application calls an interface of an application framework layer, starts the camera application, further starts a camera drive by calling a kernel layer, and captures a still image or a video through the camera 193.

The embodiments of the present application further provide a computer-readable storage medium, where a computer program is stored, and when the computer program is executed by a processor, the steps in the above-mentioned method embodiments may be implemented.

The embodiments of the present application provide a computer program product, which when running on a terminal device, enables the terminal device to implement the steps in the above method embodiments when executed.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, all or part of the processes in the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium and can implement the steps of the embodiments of the methods described above when the computer program is executed by a processor. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable storage medium may include at least: any entity or device capable of carrying computer program code to an apparatus/terminal device, recording medium, computer memory, read-only memory (ROM), Random Access Memory (RAM), electrical carrier signals, telecommunications signals, and software distribution medium. Such as a usb-disk, a removable hard disk, a magnetic or optical disk, etc. In certain jurisdictions, computer-readable storage media may not be an electrical carrier signal or a telecommunications signal in accordance with legislative and proprietary practices.

In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

In the embodiments provided in the present application, it should be understood that the disclosed apparatus/terminal device and method may be implemented in other ways. For example, the above-described embodiments of the apparatus/terminal device are merely illustrative, and for example, the division of the modules or units is only one logical division, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.

Claims

1. An antenna power adjustment method is applied to a terminal device, and comprises the following steps:

2. The method of claim 1, wherein the image comprises a first image captured by a front camera and a second image captured by a rear camera, and wherein determining the predetermined target from the images comprises:

3. The method of claim 1, wherein the image comprises a first image captured by a front camera and a second image captured by a rear camera, and wherein determining the predetermined target from the images comprises:

acquiring light information in a screen;

4. The method of claim 1, wherein the image comprises a first image captured by a front camera and a second image captured by a rear camera, and wherein determining the predetermined target from the images comprises:

acquiring impedance change values of all antennas in the terminal equipment;

5. The method according to any of claims 1-4, wherein said determining an antenna to be adjusted corresponding to said predetermined target comprises:

6. The method of claim 5, wherein when the predetermined target is a head, the determining the antenna to be adjusted corresponding to the predetermined target according to the area of the region and the position of the region comprises:

7. The method of claim 5, wherein when the predetermined target is a hand, the determining the antenna to be adjusted corresponding to the predetermined target according to the area and the position of the area comprises:

8. The method according to any of claims 1-4, wherein said determining an antenna to be adjusted corresponding to said predetermined target comprises:

9. The method according to any of claims 1-8, comprising, after reducing the transmission power of the antenna to be adjusted according to the back-off parameter corresponding to the predetermined target:

10. The method according to any of claims 1-8, comprising, after reducing the transmission power of the antenna to be adjusted according to the back-off parameter corresponding to the predetermined target:

11. A terminal device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the antenna power adjustment method according to any one of claims 1 to 10 when executing the computer program.

12. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the antenna power adjustment method according to any one of claims 1 to 10.