WO2013189460A2

WO2013189460A2 - Method and device to lock screen, and mobile terminal

Info

Publication number: WO2013189460A2
Application number: PCT/CN2013/082819
Authority: WO
Inventors: 杜冰
Original assignee: 中兴通讯股份有限公司
Priority date: 2013-06-24
Filing date: 2013-09-02
Publication date: 2013-12-27
Also published as: CN104243682B; WO2013189460A3; CN104243682A

Abstract

Disclosed are a method and device to lock a screen, and a mobile terminal. The method comprises: monitoring the change condition of a TIS; and when the value of the TIS is equal to or lower than a TIS threshold value, transmitting an instruction to lock a screen, so as to allow the screen to enter a dark screen state. In the case of not adding other devices, the method accurately realizes an operation of locking a screen of a mobile terminal, and solves the problems in the prior art that the realization of locking a screen by means of photo sensation increases the cost of a mobile terminal, and will affect the sensitivity of GPS in the screen locking process, thus prolonging the positioning time.

Description

Method, device and mobile terminal for locking screen

The present invention relates to the field of mobile communications and terminals, and in particular, to a method, an apparatus, and a mobile terminal for locking a screen. Background technique

Smartphones with multimedia processing capabilities are gradually becoming the trend of mobile terminals in the future. Among them, the technology of locking screens when answering calls has become one of the standard configurations of smart phones. On the one hand, when the mobile terminal is placed in the ear to make a call, the screen can be turned off to save power; on the other hand, the lock screen during the call can also prevent the face from touching the screen and causing misoperation.

The lock screen technology during the call can be done by the proximity sensor. Among the existing solutions, optical proximity sensors are the most widely used. When the mobile terminal is close to the human face, the light proximity sensor uses the reflection of the infrared light from the obstructing object to achieve the purpose of circuit detection. Although the detection method is sensitive, an additional sensor will increase the development cost of the mobile terminal. In addition, in the design of most mobile terminals, the optical proximity sensor is connected to the main board through a Flexible Printed Circuit (FPC), and the position of the light is limited by the layout of the whole machine. In general, the optical proximity sensor is placed on the side of the mobile terminal, which is closer to the receiving module of the Global Positioning System (GPS). Another problem caused by this is that the light sensor will radiate electromagnetic signals through the FPC. If the electromagnetic compatibility (electromagnetic compatibility, EMC for short) is not handled properly, the GPS sensitivity will be disturbed by the light perception, thus prolonging the search time of the search star. .

Therefore, the use of light perception to achieve the lock screen increases the cost of the existing mobile terminal, and in the process of locking the screen, the GPS sensitivity is affected, thereby prolonging the positioning time. Summary of the invention

Embodiments of the present invention provide a method, a device, and a mobile terminal for locking a screen, which are used to solve the problem that the prior art uses a light sense to implement a lock screen to improve the cost of the mobile terminal, and affects the GPS during the process of locking the screen. Sensitivity, thus extending the problem of positioning time.

To solve the above technical problem, in one aspect, an embodiment of the present invention provides a method for locking a screen, including: monitoring a change of Totalsotropic Sensi-ticity (TIS); the value of the TIS is equal to or When the preset TIS threshold is lower, an instruction to lock the screen is sent to bring the screen to a black screen state.

Preferably, the monitoring of the change of the TIS includes: monitoring the current working state of the mobile terminal; monitoring the change of the TIS in real time when the working state is in a preset state, where the preset state includes: sending a call Request or establish a call connection.

Preferably, after monitoring the change of the TIS in real time, the method further includes: stopping monitoring the change of the TIS when the current working state of the mobile terminal is not the preset state.

Preferably, the method further includes: determining the value of the TIS, comprising: determining a value of the TIS according to the received radio frequency front end Received Signal Strength Indication (RSSI).

Preferably, the method further comprises: when the value of the TIS is higher than the preset TIS threshold value, sending an instruction to unlock the screen, so that the screen enters a lighting state.

In another aspect, an embodiment of the present invention provides an apparatus for locking a screen, including: a monitoring module configured to monitor a change of a TIS;

The sending module is configured to send an instruction to lock the screen when the value of the TIS is equal to or lower than a preset TIS threshold, so that the screen enters a black screen state.

Preferably, the monitoring module includes: a first monitoring unit configured to monitor a current working state of the mobile terminal; and a second monitoring unit configured to be in a preset state when the working state is in a preset state, The change of the TIS is monitored in real time, where the preset state includes: sending a call request or establishing a call connection.

Preferably, the monitoring module further includes: an executing unit, configured to stop monitoring the change of the TIS when the current working state of the mobile terminal is not the preset state.

Preferably, the sending module is further configured to send an instruction to unlock the screen when the value of the TIS is higher than the preset TIS threshold, so that the screen enters a lighting state.

In still another aspect, an embodiment of the present invention further provides a mobile terminal, including: the apparatus for locking a screen as described above.

The embodiment of the present invention uses the change of the TIS to trigger the lock screen operation. When the value of the TIS is detected to be equal to or lower than the preset threshold, the instruction of the lock screen is sent to bring the screen into a black screen state. The method accurately realizes the operation of the lock screen of the mobile terminal without adding other devices, and solves the problem that the prior art adopts the light sense to realize the lock screen, which increases the cost of the mobile terminal, and affects the process of the lock screen. The problem of GPS sensitivity, thus extending the positioning time. DRAWINGS

1 is a flow chart of a method of locking a screen in an embodiment of the present invention;

2 is a schematic structural diagram of an apparatus for locking a screen in an embodiment of the present invention;

3 is a schematic diagram of a preferred structure of an apparatus for locking a screen in an embodiment of the present invention;

4 is a schematic diagram of estimating a TIS based on RSSI in a preferred embodiment of the present invention;

5 is a schematic diagram of calculating a difference between an antenna hand TIS and a head + hand TIS in a preferred embodiment of the present invention;

Figure 6 is a flow diagram of an incoming call monitoring TIS lock screen in a preferred embodiment of the present invention. detailed description

In order to solve the problem that the prior art adopts the light sense to realize the lock screen, the cost of the terminal is increased, and in the process of locking the screen, the GPS sensitivity is affected, thereby prolonging the positioning time, the present invention is implemented. The present invention provides a method, a device and a mobile terminal for locking a screen. The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The flow of the method for locking a screen provided by the embodiment of the present invention may be as shown in FIG. 1, and includes the following steps:

Step S102, monitoring a change of the TIS;

In the implementation process, if the user's hand approaches the mobile terminal, the TIS of the mobile terminal changes, and when the user's head and the hand come close to the mobile terminal, the TIS of the mobile terminal continues to change, and such a change is a deterioration trend. Therefore, monitoring the change in TIS is to monitor whether the TIS has deteriorated to a certain extent. When the hand approaches the mobile terminal, the value of the TIS will show a downward trend. When the head and the hand are close to the mobile terminal at the same time, the value of the TIS will drop more than when the hand is in contact with the mobile terminal alone.

Step S104: Send an instruction to lock the screen when the value of the TIS is equal to or lower than a preset TIS threshold, so that the screen enters a black screen state;

The preset TIS threshold value may be a value determined experimentally, or may be a value obtained by a mathematical model simulation, and can be set by a person skilled in the art as needed.

When the TIS deteriorates to be equal to or lower than the preset TIS threshold, it indicates that the user's hand and the head are close to the mobile terminal at the same time, and at a relatively close distance, at this time, an instruction to lock the screen can be sent to lock the screen, avoiding Causes misoperation when it is closer to the screen. By using this method to lock the mobile terminal, no additional components can be added, and the GPS sensitivity is not affected during the process of locking the screen.

During the implementation process, if the mobile terminal is always in the state of monitoring the TIS, the mobile terminal may consume more power. Based on the above considerations, the current working state of the mobile terminal can be monitored before monitoring the change of the TIS; if the working state of the mobile terminal is in the preset state, the change of the TIS is monitored in real time. The preset state includes: Send a call request or establish a call connection. If the mobile terminal is out of the preset state, stop monitoring

Changes in TIS. Monitoring the mobile terminal in this way can solve the problem that the mobile terminal consumes power quickly due to continuous execution of the monitoring work, and prolongs the standby time. Of course, other methods can also be used to monitor the change of the TIS of the mobile terminal, for example, detecting the TIS of the mobile terminal according to a predetermined time interval.

When monitoring the TIS, the value of the TIS can be determined in various ways. In this embodiment, the value of the TIS is determined according to the received radio frequency front end RSSI.

When it is detected that the value of the TIS is higher than the preset TIS threshold, it is determined that the head is away from the mobile terminal, and an instruction to unlock the screen can be sent to bring the screen into a lighting state. At this time, the highlighted screen can normally receive the user's operation.

The embodiment also provides a device for locking a screen. The structure of the device is schematically shown in FIG. 2, and includes:

Monitoring module 10, configured to monitor changes in TIS;

The sending module 20 is coupled to the monitoring module 10 and configured to send a command to lock the screen to bring the screen to a black screen state when the value of the TIS is equal to or lower than a preset TIS threshold.

The monitoring module 10 and the sending module 20 may be a central processing unit (CPU), a digital signal processor (DSP) or a programmable logic array (Field-Programmable Gate Array) in the mobile terminal. FPGA, ) implementation.

FIG. 3 shows a block diagram of a preferred structure of the monitoring module 10. The monitoring module 10 includes: a first monitoring unit 102 configured to monitor a current working state of the mobile terminal;

The second monitoring unit 104 is coupled to the first monitoring unit 102, and configured to monitor the change of the TIS in real time when the current working state of the mobile terminal is in a preset state; wherein, the pre-scheduled state includes: sending a call request Or establish a call connection;

The executing unit 106 is coupled to the first monitoring unit 102 and configured to stop monitoring the change of the TIS if the mobile terminal is out of the preset state. The first monitoring unit 102, the second monitoring unit 104, and the executing unit 106 may be implemented by a CPU, a DSP, or an FPGA in the monitoring module 10.

During the operation of the device for locking the screen, the sending module 20 is further configured to send an instruction to unlock the screen when the value of the TIS is higher than the preset TIS threshold, so that the screen enters the lighting. status.

Preferred embodiment

In the preferred embodiment, the mobile terminal takes a smart phone as an example. The smartphone screen consumes a large amount of power, and the touch-screen phone may malfunction when the human ear answers the phone because the face touches the screen. These problems can be solved if the screen can be locked while the human ear is answering. The lock screen method in the related art uses the proximity sensor to control the lock screen, which increases the cost of the mobile phone.

The preferred embodiment utilizes the sensing of the antenna instead of the proximity sensor to control the lock screen. When the call is answered, if the antenna is close to the human ear, the TIS may deteriorate rapidly. At this time, the front end of the radio frequency circuit of the mobile phone detects the change of the RSSI, and the processor thinks that the mobile phone starts to approach the human ear to receive the call, and simultaneously sends the lock screen signal.

At the time of incoming call access, the mobile phone RF front end continuously detects the RSSI, thereby calculating the degree of deterioration of the corresponding TIS. The calculation process can be seen in Figure 4. The RSSI of the received RF front-end is sent to the main chip for processing, and the real-time TIS is reversed. According to this value, it is judged whether the mobile phone is close to the human ear to answer, and if so, the lock screen signal is sent; if not, the lock screen is not performed. In the implementation process, it can be judged by referring to FIG. 5. FIG. 5 shows the antenna hand TIS, the head + hand TIS measured in the laboratory stage, and the difference tis_d is obtained according to the above two TIS.

The following describes the preferred embodiment of the present invention with reference to FIG. 6, including the following steps: Step S602: When the mobile phone calls, the main chip starts the TIS real-time monitoring mechanism;

Step S604, determining whether the current TIS of the mobile phone is lower than or equal to tis_d. If yes, go to step S608, otherwise go to step S606;

Step S606, maintaining the current state of not locking the screen, that is, maintaining the original state; Step S608, when the hand TIS is lower than or equal to tis_d, the main chip sends a lock screen signal, the mobile phone enters the lock screen state, and the screen is extinguished;

In step S610, the mobile phone continuously monitors the TIS of the antenna port in the process of the entire call; step S612, determining whether the TIS exceeds tis_d, and if so, determining that the current head is far away from the mobile phone, performing step S614; otherwise, performing step S616;

Step S614, the screen is lit and is in an active state;

Step S616, maintaining a lock screen state;

Step S618, when the incoming call ends, the TIS real-time monitoring mechanism is turned off.

The preferred embodiment achieves the operation of the lock screen during the answering call by using the antenna to induce the change of the electromagnetic field, which is convenient and quick, not only reduces the hardware cost of the mobile terminal, such as the mobile phone, but also considers the influence of the light-sensing FPC on the GPS receiving sensitivity. Reduce the difficulty of the whole machine design.

While the preferred embodiments of the present invention have been disclosed for purposes of illustration, those skilled in the art will recognize that various modifications, additions and substitutions are possible, and the scope of the invention should not be limited to the embodiments described above.

Claims

claims

1. A method of locking the screen. The method includes:

Monitor changes in omnidirectional sensitivity TIS;

When the value of the TIS is equal to or lower than the preset TIS threshold value, a command to lock the screen is sent to cause the screen to enter a black screen state.

2. The method of claim 1, wherein the monitoring changes in TIS includes: monitoring the current working status of the mobile terminal;

When the working state is in a preset state, changes in the TIS are monitored in real time, where the preset state includes: sending a call request or establishing a call connection.

3. The method of claim 2, wherein after the real-time monitoring of changes in the TIS, the method further includes:

When the current working state of the mobile terminal is not the preset state, stop monitoring changes in the TIS.

4. The method according to any one of claims 1 to 3, wherein the method further includes: determining the value of the TIS, including:

The value of the TIS is determined based on the received radio frequency front-end received signal strength indication RSSI.

5. The method according to any one of claims 1 to 3, wherein the method further includes: when the value of the TIS is higher than the preset TIS threshold value again, sending an instruction to unlock the screen, Put the screen into a lit state.

6. A device for locking the screen. The device includes:

The monitoring module is configured to monitor changes in omnidirectional sensitivity TIS;

The sending module is configured to send an instruction to lock the screen when the value of the TIS is equal to or lower than the preset TIS threshold value, so that the screen enters a black screen state.

7. The device according to claim 6, wherein the monitoring module includes:

The first monitoring unit is configured to monitor the current working status of the mobile terminal; The second monitoring unit is configured to monitor changes in the TIS in real time when the working state is in a preset state, where the preset state includes: sending a call request or establishing a call connection.

8. The device according to claim 7, wherein the monitoring module further includes:

The execution unit is configured to stop monitoring changes in the TIS when the current working state of the mobile terminal is not the preset state.

9. The device according to any one of claims 6 to 8, wherein,

The sending module is also configured to send an instruction to unlock the screen when the value of the TIS is higher than the preset TIS threshold value again, so that the screen enters a lighting state.

10. A mobile terminal, the mobile terminal comprising: the device for locking the screen according to any one of claims 6 to 9.