CN103458110B - A kind of method and mobile terminal regulating display backlight in conjunction with acceleration transducer - Google Patents

Abstract

The invention discloses a method for adjusting the backlight of a display screen combined with an acceleration sensor and a mobile terminal. The method includes the following steps: when S1 receives a screen brightening request, the light sensor collects the current ambient light intensity and uploads it to the application layer to adjust The corresponding backlight brightness of the display screen; S2 the acceleration sensor detects the tilt angle A of the current mobile terminal; S3 when the light sensor collects changes in the ambient light intensity, first, the acceleration sensor detects the tilt angle B of the mobile terminal at this time, and judges the tilt angle Whether the difference between angle A and tilt angle B is greater than the set angle threshold; if yes, maintain the original backlight brightness of the display screen, if not, the light sensor uploads the new ambient light intensity to the application layer to re- Adjust the brightness of the display's backlight. It solves the problem that the brightness of the display screen is incorrectly adjusted due to differences in the tilt angle of the mobile terminal, thereby causing the display screen to flicker, and provides users with a more reliable functional experience.

Description

Method and mobile terminal for adjusting display backlight combined with acceleration sensor

technical field

The invention relates to the technical field of mobile communication; in particular, it relates to a method for accurately adjusting the backlight of a display screen combined with an acceleration sensor and a mobile terminal.

Background technique

In the prior art, the mobile terminal can intelligently adjust the brightness of the backlight of the display screen by using a light sensor. The light sensor can sense the surrounding light conditions, and inform the processing chip to automatically adjust the brightness of the backlight, thereby reducing the power consumption of the product and prolonging the working time of the battery to the greatest extent. When the ambient light intensity is weak, the backlight brightness is low, and when the ambient light intensity is strong, the backlight brightness is high. The current ambient light intensity is collected by the light sensor, and the backlight brightness of the display screen is intelligently adjusted according to the ambient light intensity, so that users can read softly, without glare, and save power.

The working principle of the light sensor is as follows: the mobile terminal is provided with a light hole, and the light sensor collects the current ambient light intensity through the light hole. However, since the change of the inclination angle of the mobile terminal will directly affect the irradiation angle of the light source on the mobile terminal, thereby affecting the light intensity of the light inlet hole, so in daily life, there is often such a situation, in a certain fixed ambient light condition Next, if we change the inclination angle of the mobile terminal, which affects the light intensity of the light inlet hole, resulting in changes in the ambient light intensity collected by the light sensor and misadjusting the backlight brightness of the display screen, resulting in flickering on the display screen, serious affect user experience.

Contents of the invention

The purpose of the present invention is to solve the above-mentioned defects in the prior art, and provide a method for adjusting the backlight of the display screen combined with an acceleration sensor and a mobile terminal, which can effectively solve the problem of misadjusting the brightness of the display screen due to the difference in the tilt angle of the mobile terminal, resulting in display screen flickering problem. Provide users with a more reliable functional experience.

The purpose of the present invention can be achieved by taking the following technical solutions:

A method for adjusting the backlight of a display screen combined with an acceleration sensor is provided, and the method includes the following steps:

S1. When the mobile terminal receives a bright screen request, turn on the light sensor, the light sensor collects the current ambient light intensity through the light inlet, and uploads the collected ambient light intensity to the application layer. After the application layer receives the ambient light intensity , to adjust the brightness of the backlight of the display;

S2. Turn on the acceleration sensor, and detect the tilt angle A of the current mobile terminal through the acceleration sensor;

S3. When the light sensor collects a change in the ambient light intensity, do not upload the new ambient light intensity first. First, detect the inclination angle B of the mobile terminal at this time through the acceleration sensor, and determine the difference between the inclination angle A and the inclination angle B. Whether the difference between is greater than the set angle threshold; if it is judged to be yes, then execute step S4, if it is judged to be no, then execute step S5;

S4, indicating that the mobile terminal is still in the environment of the original ambient light intensity, cancel uploading the new ambient light intensity, and maintain the original backlight brightness of the display screen;

S5, indicating that the ambient light intensity has changed, the light sensor uploads the new ambient light intensity to the application layer, and the application layer readjusts the backlight brightness of the display screen after receiving the new ambient light intensity.

As a preferred solution, the corresponding relationship between the ambient light intensity and the backlight brightness is preset in the mobile terminal, and the corresponding relationship between the ambient light intensity and the backlight brightness is built in the mobile terminal before leaving the factory.

Further, the specific process of the acceleration sensor detecting the tilt angle of the current mobile terminal is as follows:

The acceleration sensor detects the three-axis components of the acceleration of gravity on the X axis, the Y axis and the Z axis, and calculates the tilt angle of the mobile terminal according to the components of the acceleration of gravity on the X axis, the Y axis and the Z axis.

As a preferred solution, the angle threshold is 15 degrees.

Provide a mobile terminal using the above method for adjusting the backlight of a display screen in combination with an acceleration sensor, the mobile terminal comprising:

The display screen detection module is used to detect whether the display screen of the mobile terminal receives a bright screen request;

The light sensor is automatically started when the display screen detection module detects a bright screen request, and collects the current ambient light intensity through the light inlet provided on the mobile terminal; and uploads the collected ambient light intensity to the application layer;

The acceleration sensor is automatically started when the display screen detection module detects a bright screen request, and is used to detect the tilt angle A of the current mobile terminal. When the light sensor detects that the ambient light intensity changes, it is first detected by the acceleration sensor. The tilt angle B of the mobile terminal at this time;

Threshold comparison module, for judging whether the difference between the inclination angle A and the inclination angle B detected by the acceleration sensor is greater than the set angle threshold;

Execute module, carry out processing respectively according to the judgment result of threshold value comparison module, if the difference between inclination angle A and inclination angle B is greater than the angle threshold value of setting, so make light sensor cancel the upper new ambient light intensity; If inclination angle A The difference between the tilt angle B and the angle B is less than the set angle threshold, so that the light sensor uploads a new ambient light intensity;

The storage module is used to store the corresponding relationship between the preset ambient light intensity and the brightness of the backlight in the mobile terminal;

The backlight brightness adjustment module is used to adjust the backlight brightness of the display screen according to the ambient light intensity uploaded by the light sensor and according to the corresponding relationship between the ambient light intensity and the backlight brightness preset in the storage module.

As a preferred solution, the acceleration sensor is a three-axis acceleration sensor, and the specific process of detecting the tilt angle of the current mobile terminal by the three-axis acceleration sensor is as follows:

The acceleration sensor detects the three-axis components of the acceleration of gravity on the X axis, the Y axis and the Z axis, and calculates the tilt angle of the mobile terminal according to the components of the acceleration of gravity on the X axis, the Y axis and the Z axis.

Compared with the prior art, the present invention has the following beneficial effects:

The combination of the light sensor and the acceleration sensor solves the problem that the light sensor misjudges the change of the current ambient light intensity due to the difference in the tilt angle of the mobile terminal, thereby misadjusting the backlight brightness of the display screen and causing the display screen to flicker. When the display is on, the acceleration sensor detects the current tilt angle A of the mobile terminal. When the light sensor detects that the current ambient light intensity changes, the acceleration sensor detects the current ambient light intensity without uploading the new ambient light intensity. The inclination angle B of the mobile terminal determines whether the difference between the inclination angle A and the inclination angle B is greater than the set angle threshold, if it is judged to be yes, it is considered that the light sensor misjudged the current environment due to the change in the inclination angle of the mobile terminal The light intensity changes, and then it is judged that the current ambient light intensity has not changed, and the existing backlight brightness of the display screen is maintained. This greatly reduces the probability of misadjusting the brightness of the backlight of the display screen, avoids flickering of the display screen, and optimizes user experience.

Description of drawings

Fig. 1 is a schematic flow chart of the method for adjusting the backlight of a display screen in combination with an acceleration sensor in the present invention;

FIG. 2 is a schematic structural block diagram of a mobile terminal according to the present invention.

detailed description

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. In combination with the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

Example 1:

Embodiment 1 of the present invention provides a method for adjusting the backlight of the display screen combined with an acceleration sensor, which is intended to solve the problem of preventing the light sensor from misjudging the change in the current ambient light intensity when the tilt angle of the mobile terminal changes, thereby misadjusting the display screen. The brightness of the backlight caused the problem of flickering of the display. The present embodiment will be described in detail below in conjunction with the accompanying drawings.

Fig. 1 is a schematic flow chart of Embodiment 1 of the present invention, please refer to Fig. 1, the method of this embodiment includes the following steps:

S1. When the mobile terminal receives a screen brightening request, activate the light sensor, and the light sensor collects the current ambient light intensity (set to X) through the light inlet provided on the mobile terminal, and uploads the collected ambient light intensity X Go to the application layer; after the application layer receives the ambient light intensity X, it responds to the screen brightening request, and adjusts the corresponding backlight brightness of the display screen according to the ambient light intensity X; at the same time, it also executes step S2;

In the Android system of mobile terminals, the architecture of the sensor is the application layer, the hardware device layer and the driver layer from top to bottom. The data of the light sensor and the acceleration sensor are obtained at the driver layer, and then passed to the upper layer in turn, and finally passed to the application layer for processing. For example, after the light sensor collects the current ambient light intensity, it uploads the ambient light intensity to the application layer, and the application layer processes the display backlight brightness according to the ambient light intensity. The inclination angle value of the mobile terminal is also obtained through calculation at the application layer.

As a preferred solution, in the mobile terminal, the corresponding relationship between the ambient light intensity and the backlight brightness is preset, and the corresponding relationship between the ambient light intensity and the backlight brightness is built in the mobile terminal before leaving the factory. When the light sensor uploads the current ambient light intensity X to the application layer, and the application layer receives the ambient light intensity X, it sets the display screen of the mobile terminal according to the corresponding backlight brightness set at the factory. In order to allow users to read softly, not dazzling, and to achieve the purpose of saving power. When the ambient light intensity is weak, the backlight brightness of the display screen should be adjusted to a low level, and when the ambient light intensity is strong, the backlight brightness of the display screen should be adjusted to a high level.

S2. Turn on the acceleration sensor, and detect the tilt angle A of the current mobile terminal through the acceleration sensor;

Preferably, the acceleration sensor is a three-axis acceleration sensor; the specific process of the acceleration sensor detecting the tilt angle of the current mobile terminal is as follows:

The acceleration sensor detects the three-axis components of the acceleration of gravity on the X axis, the Y axis and the Z axis, and calculates the tilt angle of the mobile terminal according to the components of the acceleration of gravity on the X axis, the Y axis and the Z axis.

Since the vector direction of the gravitational acceleration must be vertically downward, and the value of the gravitational acceleration is constant at 9.8, as long as the components of the gravitational acceleration on the X-axis, Y-axis and Z-axis are known, the tilt angle of the current mobile terminal can be calculated .

Here, take the mobile phone as an example: since the vector direction of the acceleration of gravity must be vertically downward, and the value of the acceleration of gravity is constant at 9.8, when the mobile phone is in the state of vertical horizontal screen, the Z-axis value of the acceleration of gravity It is 9.8, the X-axis value is 0, and the Y-axis value is also 0.

When the mobile phone is in a tilted state, the vertically downward gravitational acceleration will have components on the three spatial axes of X-axis, Y-axis and Z-axis. The three-axis components are also different with different tilt angles. The inclination angle of the mobile phone is calculated and determined according to the magnitude of the components of the acceleration of gravity on the three axes.

For example, when the mobile phone is in the vertical landscape state on the right, the inclination angle of the mobile phone is 90 degrees, and when the mobile phone is in the vertical landscape state on the left side, the inclination angle of the mobile phone is 270 degrees. And when the mobile phone is in the vertical portrait state, the inclination angle of the mobile phone is 0 degree or 360 degrees.

Inevitably, when the display screen is in the bright screen state, the light sensor continues to collect the current ambient light intensity, and judges whether the current ambient light intensity changes, if it is judged to be no, then continue to collect, if it is judged to be yes, then enter step S3 ;

S3. When the light sensor collects a change in the ambient light intensity, when the ambient light intensity changes from X to Y, do not upload the new ambient light intensity Y first, first, detect the tilt angle of the mobile terminal at this time through the acceleration sensor B, and determine whether the difference between the inclination angle A and the inclination angle B is greater than the set angle threshold; if it is judged to be yes, then execute step S4; if it is judged to be no, then execute step S5;

As a preferred solution, the angle threshold is 15 degrees.

Of course, in practical applications, the angle threshold can also be other values, and the thresholds of different mobile terminals are also different, which can be set according to the specific situation. Of course, the set angle threshold can also be changed. This embodiment only provides a preferred angle threshold.

S4, explaining that the mobile terminal is still in the environment of the original ambient light intensity X, cancel uploading the new ambient light intensity Y, because the application layer does not receive the new ambient light intensity at this time, so maintain the original backlight brightness of the display screen;

S5, indicating that the ambient light intensity of the environment where the mobile terminal is located has changed, the light sensor uploads the new ambient light intensity Y to the application layer, and the application layer readjusts according to the ambient light intensity Y after receiving the new ambient light intensity Y Display backlight brightness.

For ease of understanding, the mobile phone whose backlight brightness of the display screen is set to six incremental brightness levels at the factory is taken as an example for illustration. For example, when the mobile phone is shipped from the factory, the backlight brightness is set to six incremental levels: 10% brightness level, 20% brightness level, 30% brightness level, 50% brightness level, 70% brightness level and 100% brightness level. In addition, different ambient light intensities correspond to different brightness levels, and the angle threshold of the mobile phone is 15 degrees. The following is an example of practical application:

Table 1 shows the corresponding relationship between the ambient light intensity and the backlight brightness set when the mobile phone leaves the factory (of course, this is only an example, and different mobile terminals and different light sensor settings may be different).

ambient light intensity Backlight brightness less than 30 10% brightness level 30～300 20% brightness level 300～800 30% brightness level 800～2500 50% brightness level 2500～5500 70% brightness level 5500 or more 100% brightness level

Table 1

For example: the current ambient light intensity is 200, and the backlight of the display screen is lit at a brightness level of 20%. At the same time, the current inclination angle A of the mobile terminal is detected by the acceleration sensor.

When the light sensor collects that the current ambient light intensity becomes 500, the ambient light intensity is not uploaded first, but the current tilt angle B of the mobile terminal is detected by the speed sensor; and the tilt angle B between the tilt angle A and the tilt angle B is judged Whether the difference is greater than 15 degrees.

For example, if the difference between the inclination angle A and the inclination angle B is 40 degrees, it is determined that the light intensity entering the light hole has increased due to the difference in the inclination angle of the mobile phone, but the actual ambient light intensity has not changed. For example, it may be due to the change of the tilt angle of the mobile phone that the light hole on the mobile phone is facing the light source. Because the light source directly hits the light hole, the light sensor mistakenly believes that the current ambient light is 500. After the position is almost the same, the ambient light sensor must mistakenly believe that the current ambient light intensity has changed from 500 to 200, so that the backlight brightness of the mobile phone display is misadjusted at a high frequency, causing the display to flicker. However, in the present invention, uploading the new ambient light intensity 500 should be canceled at this time, and the application layer does not receive the new ambient light intensity 500, so the existing 20% brightness level of the display screen of the mobile phone is maintained, effectively solving the flickering of the display screen The problem.

If the difference between the tilt angle A and the tilt angle B is 10 degrees, it is judged that the current ambient light intensity has changed, and the ambient light intensity changes from 200 to 500, and the light sensor reports the new ambient light intensity of 500 to the application layer. After the application layer receives the new ambient light intensity of 500, adjust the backlight brightness of the mobile phone display to 30% brightness level. Wherein, the value of the above-mentioned ambient light intensity is a data value directly read from the register of the ambient light sensor.

It should be emphasized here that, in the present invention, the mobile terminal may be a mobile phone, an electronic book, a personal digital assistant (PDA), a palmtop computer, a human-computer interaction terminal or other handheld terminal devices with a display function.

Example 2

Embodiment 2 of the present invention provides a mobile terminal using the method for adjusting the backlight of a display screen in combination with an acceleration sensor. FIG. 2 is a schematic block diagram of the structure provided by Embodiment 2 of the present invention. The mobile terminal includes:

The display screen detection module 10 is used to detect whether the display screen has received a screen brightening request; wherein, the screen brightening request can include various methods, taking a mobile phone as an example, the bright screen request includes but is not limited to a phone call, a text message reminder, or press Press the power button;

The light sensor 20, when the display screen detection module 10 detects a bright screen request, starts automatically, collects the current ambient light intensity through the light inlet provided on the mobile terminal; and uploads the collected ambient light intensity to the application layer;

The acceleration sensor 30 is automatically started when the display screen detection module 10 detects a bright screen request, and is used to detect the tilt angle A of the current mobile terminal. When the light sensor 20 detects that the ambient light intensity changes, it will not Upload the new ambient light intensity, first detect the inclination angle B of the mobile terminal at this time through the acceleration sensor 30;

Preferably, the acceleration sensor 30 is a three-axis acceleration sensor. The specific process of the three-axis acceleration sensor detecting the tilt angle of the current mobile terminal is as follows:

The acceleration sensor detects the three-axis components of the acceleration of gravity on the X axis, the Y axis and the Z axis, and calculates the tilt angle of the mobile terminal through the components of the acceleration of gravity on the X axis, the Y axis and the Z axis.

Since the vector direction of the gravitational acceleration must be vertically downward, and the value of the gravitational acceleration is constant at 9.8, as long as the components of the gravitational acceleration on the X-axis, Y-axis and Z-axis are known, the tilt angle of the current mobile terminal can be calculated .

Here, take the mobile phone as an example: since the vector direction of the acceleration of gravity must be vertically downward, and the value of the acceleration of gravity is constant at 9.8, when the mobile phone is in the state of vertical horizontal screen, the Z-axis value of the acceleration of gravity It is 9.8, the X-axis value is 0, and the Y-axis value is also 0.

When the mobile phone is in a tilted state, the vertically downward gravitational acceleration will have components on the three spatial axes of the X-axis, Y-axis and Z-axis. The three-axis components are also different with different tilt angles. The inclination angle of the mobile phone is calculated and determined according to the magnitude of the three-axis components of the acceleration of gravity.

For example, when the mobile phone is in the vertical landscape state on the right, the inclination angle of the mobile phone is 90 degrees, and when the mobile phone is in the vertical landscape state on the left side, the inclination angle of the mobile phone is 270 degrees. And when the mobile phone is in the vertical portrait state, the inclination angle of the mobile phone is 0 degree or 360 degrees.

Threshold comparison module 40, for judging whether the difference between the inclination angle A and the inclination angle B detected by the acceleration sensor 30 is greater than the set angle threshold;

As a preferred solution, the angle threshold may be 15 degrees. Of course, in practical applications, the angle threshold may also be other values, and different mobile terminals may have different angle thresholds, which may be set or changed according to actual conditions.

Execution module 50, according to the judgment result of threshold comparison module 40, carry out processing respectively, if the difference between inclination angle A and inclination angle B is greater than the angle threshold value of setting, so make light sensor 20 cancel and upload new ambient light intensity; If the difference between the inclination angle A and the inclination angle B is less than the set angle threshold, then the light sensor 20 is enabled to upload a new ambient light intensity;

The storage module 60 is used to store the corresponding relationship between the preset ambient light intensity and the brightness of the backlight in the mobile terminal;

In this embodiment, preferably, the corresponding relationship between the ambient light intensity and the backlight brightness is built in the storage module 60 of the mobile terminal before leaving the factory. When the light sensor 20 uploads the current ambient light intensity to the application layer, the application layer sets the display backlight of the mobile terminal according to the corresponding backlight brightness after receiving the light intensity. In order to allow users to read softly, not dazzling, and to achieve the purpose of saving power. When the ambient light intensity is weak, the backlight brightness of the display screen should be adjusted to a low level, and when the ambient light intensity is strong, the backlight brightness of the display screen should be adjusted to a high level.

The backlight brightness adjustment module 70 is configured to adjust the backlight brightness of the display screen according to the ambient light intensity uploaded by the light sensor 20 and according to the corresponding relationship between the ambient light intensity and the backlight brightness preset in the storage module 60 .

It is worth noting that in the above-mentioned mobile terminal embodiments, the included modules are only divided according to functional logic, but are not limited to the above-mentioned division, as long as the corresponding functions can be realized; in addition, the specific functions of each functional module The names are only for the convenience of distinguishing each other, and are not used to limit the protection scope of the present invention.

The mobile terminal can be a mobile phone, an electronic book, a personal digital assistant (PDA), a palmtop computer, a human-computer interaction terminal or other handheld terminal devices with a display function.

In addition, those of ordinary skill in the art can understand that all or part of the steps in the methods of the above-mentioned embodiments can be completed by instructing related hardware through programs, and the corresponding programs can be stored in a computer-readable storage medium. Storage media, such as ROM/RAM, magnetic disk or optical disk, etc.

The above-mentioned embodiment is a preferred embodiment of the present invention, but the embodiment of the present invention is not limited by the above-mentioned embodiment, and any other changes, modifications, substitutions, combinations, Simplifications should be equivalent replacement methods, and all are included in the protection scope of the present invention.

Claims (7)

1. regulate a method for display backlight in conjunction with acceleration transducer, it is characterized in that, the method comprises the following steps:

S1, when mobile terminal receives bright screen request, open optical sensor, optical sensor gathers current ambient light intensity by light well, and the ambient light intensity collected is uploaded to application layer, after application layer receives ambient light intensity, regulate the backlight illumination of display screen;

S2, unlatching acceleration transducer, and the angle of inclination A of current mobile terminal is detected by acceleration transducer;

S3, when described optical sensor collect ambient light intensity change time, first do not upload new ambient light intensity, first, detected the angle of inclination B of now mobile terminal by acceleration transducer, and judge whether the difference between angle of inclination A and angle of inclination B is greater than the angle threshold of setting; Be judged as YES, then perform step S4, be judged as NO, then perform step S5;

S4, explanation mobile terminal, still in the environment of former ambient light intensity, are cancelled and are uploaded new ambient light intensity, maintain the original backlight illumination of display screen;

S5, explanation ambient light intensity there occurs change, and new ambient light intensity is uploaded to application layer by optical sensor, after application layer receives new ambient light intensity, readjusts the backlight illumination of display screen.

2. the method regulating display backlight in conjunction with acceleration transducer according to claim 1, it is characterized in that, preset the corresponding relation of ambient light intensity and backlight illumination in mobile terminal, and the corresponding relation of described ambient light intensity and backlight illumination is in the terminal built-in before dispatching from the factory.

3. the method regulating display backlight in conjunction with acceleration transducer according to claim 1, is characterized in that, the detailed process that described acceleration transducer detects current mobile terminal angle of inclination is as follows:

Acceleration transducer detects acceleration of gravity in X-axis, three axle component size of Y-axis and Z axis, and according to acceleration of gravity in X-axis, the component size on Y-axis and Z axis calculates the angle of inclination of mobile phone.

4. the method regulating display backlight in conjunction with acceleration transducer according to claim 1, it is characterized in that, described angle threshold is 15 degree.

5. adopt the mobile terminal regulating the method for display backlight in conjunction with acceleration transducer according to any one of claim 1-4, it is characterized in that, this mobile terminal comprises:

Whether display screen detection module, receive bright screen request for the display screen detecting mobile terminal;

Optical sensor, when described display screen detection module detects bright screen request, automatically starts, gathers current ambient light intensity by the light well that mobile terminal is arranged; And the ambient light intensity collected is uploaded to application layer;

Acceleration transducer, when described display screen detection module detects bright screen request, automatic startup, for detecting the angle of inclination A of current mobile terminal, when described light sensors changes to ambient light intensity, first detected the angle of inclination B of now mobile terminal by acceleration transducer;

Threshold value comparison module, for judging the angle threshold that described acceleration transducer detects the difference between angle of inclination A and angle of inclination B obtained and whether is greater than setting;

Execution module, the judged result according to threshold value comparison module processes respectively, if the difference between angle of inclination A and angle of inclination B is greater than the angle threshold of setting, so makes optical sensor cancel and uploads new ambient light intensity; If the difference between angle of inclination A and angle of inclination B is less than the angle threshold of setting, optical sensor is so made to upload new ambient light intensity;

Memory module, for the corresponding relation of the ambient light intensity that presets in memory mobile terminal and backlight illumination;

Backlight illumination adjustment module, for the ambient light intensity uploaded according to described optical sensor, and regulates the backlight illumination of display screen according to the ambient light intensity preset in described memory module and the corresponding relation of backlight illumination.

6. mobile terminal according to claim 5, is characterized in that, described acceleration transducer is 3-axis acceleration sensor, and the detailed process that this 3-axis acceleration sensor detects current mobile terminal angle of inclination is as follows:

Acceleration transducer detects acceleration of gravity in X-axis, three axle component size of Y-axis and Z axis, and according to acceleration of gravity in X-axis, the component size on Y-axis and Z axis calculates the angle of inclination of mobile terminal.

7. mobile terminal according to claim 5, is characterized in that, described angle threshold is 15 degree.