CN106550126A - The control device and method of mobile terminal and its screen intensity - Google Patents

The control device and method of mobile terminal and its screen intensity Download PDF

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Publication number
CN106550126A
CN106550126A CN201610928589.0A CN201610928589A CN106550126A CN 106550126 A CN106550126 A CN 106550126A CN 201610928589 A CN201610928589 A CN 201610928589A CN 106550126 A CN106550126 A CN 106550126A
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screen
brightness
mobile terminal
external environment
state
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CN201610928589.0A
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CN106550126B (en
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蒋权
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Cui Qi
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Nubia Technology Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
    • H04M1/724—User interfaces specially adapted for cordless or mobile telephones
    • H04M1/72448—User interfaces specially adapted for cordless or mobile telephones with means for adapting the functionality of the device according to specific conditions
    • H04M1/72454—User interfaces specially adapted for cordless or mobile telephones with means for adapting the functionality of the device according to specific conditions according to context-related or environment-related conditions
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/10—Intensity circuits
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness

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  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Human Computer Interaction (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Telephone Function (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention discloses the control device and method of a kind of mobile terminal and its screen intensity, wherein, the device includes：Acquisition module, in mobile terminal call establishment, gathering the first current external environment brightness；The second current external environment brightness of collection is spaced when bright screen state is changed into going out screen state, to schedule in the screen of mobile terminal；Brightness judge module, for judging the second external environment brightness with the ratio of the first external environment brightness whether less than predetermined luminance proportionality coefficient；Adjustment module, in the case of in ratio less than predetermined luminance proportionality coefficient, keeps screen in screen state of going out.By using the present invention, in mobile terminal call establishment, present intensity ratio is compared with predetermined luminance proportionality coefficient, and then the distance of current mobile terminal and user's ear is judged by brightness case, with the light on and off of control screen.

Description

Mobile terminal and screen brightness control device and method thereof
Technical Field
The invention relates to the field of communication, in particular to a mobile terminal and a device and a method for controlling screen brightness of the mobile terminal.
Background
In the existing mobile phone scheme, in order to reduce the power consumption of the mobile phone, when a user answers a call, the infrared sensor is started, and if the corresponding infrared signal data is within the threshold range, the mobile phone is judged to be close to the ear and the screen of the mobile phone is turned off.
At present, there are two main types of infrared Light senses on a mobile phone, one is a Light Emitting Diode (LED) infrared Light sense, and the other is a Vertical Cavity Surface Emitting Laser (VCSEL) infrared Light sense (i.e. aperture scheme Light sense), and the two main differences of the two types of Light senses are that infrared Light beams emitted by VCSEL Light emitting tubes are more concentrated, and the diameter of a hole required on a touch screen is smaller.
The distance is judged mainly through receiving infrared signal intensity to LED infrared light sense, but, when using LED infrared light sense as cell-phone conversation screen-off scheme, when the cell-phone was too close to the ear, the cell-phone can bright screen on the contrary, and user experience is lower.
Disclosure of Invention
The invention mainly aims to provide a mobile terminal and a device and a method for controlling screen brightness of the mobile terminal, and aims to solve the problems that in the prior art, when LED infrared light sensation is used as a mobile phone call screen-off scheme, when a mobile phone is too close to an ear, the mobile phone can turn on the screen, and user experience is low.
In order to achieve the above object, the present invention provides a device for controlling screen brightness of a mobile terminal, including: the acquisition module is used for acquiring the current first external environment brightness when the mobile terminal is connected with a call; when the screen of the mobile terminal is changed from a bright screen state to a screen-off state, acquiring the current second external environment brightness according to a preset time interval; the brightness judging module is used for judging whether the ratio of the second external environment brightness to the first external environment brightness is smaller than a preset brightness proportion coefficient or not; and the adjusting module is used for keeping the screen in a screen-off state under the condition that the ratio is smaller than the preset brightness scale coefficient.
Optionally, the collecting module includes: the judging unit is used for judging whether the current infrared signal intensity is between a first preset intensity threshold value and a second preset intensity threshold value; and the acquisition unit is used for acquiring the current second external environment brightness under the condition that the infrared signal intensity is between the first preset intensity threshold and the second preset intensity threshold.
Optionally, the adjusting module is further configured to light the screen in the screen-off state when the ratio is greater than or equal to the preset brightness scale coefficient.
Optionally, the method further includes: the call judging module is used for judging whether the mobile terminal is still in the call process; the mobile terminal comprises a detection module, a display module and a display module, wherein the detection module is used for detecting whether a screen of the mobile terminal enters a screen-off state from a screen-on state under the condition that the mobile terminal is still in a call process; the acquisition module is further used for collecting the current second external environment brightness when the screen enters a screen-off state from a screen-on state.
In addition, to achieve the above object, the present invention further provides a mobile terminal, including: the system comprises a light sensor, a processor and an LED infrared sensor; the light sensor is used for collecting the brightness of the external environment;
the LED infrared sensor acquires the current infrared signal intensity to trigger the processor to control the screen of the mobile terminal to be changed from a bright screen state to a dead screen state according to the current infrared signal intensity; the processor judges whether the brightness coefficient of the current external environment is smaller than a preset brightness proportion coefficient or not; under the condition that the brightness coefficient is smaller than the preset brightness proportion coefficient, keeping the screen in a screen-off state; the brightness coefficient is a ratio of a second external environment brightness to a first external environment brightness, the first external environment brightness is the external environment brightness acquired by the optical sensor when the mobile terminal is connected to a call, and the second external environment brightness is the external environment brightness acquired by the optical sensor according to a preset time interval when a screen of the mobile terminal is changed from a bright screen state to a screen-off state.
Optionally, the processor is specifically configured to determine whether the current infrared signal intensity is between a first preset intensity threshold and a second preset intensity threshold after the light sensor collects the first external environment brightness; and under the condition that the intensity of the infrared signal is between the first preset intensity threshold value and the second preset intensity threshold value, triggering the optical sensor to acquire the second external environment brightness.
In addition, in order to achieve the above object, the present invention further provides a method for controlling screen brightness of a mobile terminal, the method comprising the steps of: when the mobile terminal is connected with a call, acquiring the current first external environment brightness through the optical sensor; when the screen of the mobile terminal is changed from a bright screen state to a screen-off state, acquiring the current second external environment brightness through the optical sensor according to a preset time interval; judging whether the ratio of the second external environment brightness to the first external environment brightness is smaller than a preset brightness proportion coefficient or not; and under the condition that the ratio is smaller than the preset brightness scale coefficient, keeping the screen in a screen-off state.
Optionally, the acquiring, by the light sensor, the current second external environment brightness includes: judging whether the current infrared signal intensity is between a first preset intensity threshold value and a second preset intensity threshold value; and acquiring the current second external environment brightness through the optical sensor under the condition that the infrared signal intensity is between the first preset intensity threshold and the second preset intensity threshold.
Optionally, after determining whether a ratio of the second external environment brightness to the first external environment brightness is smaller than a preset brightness scale factor, the method further includes: and under the condition that the ratio is greater than or equal to the preset brightness scale coefficient, lightening the screen in a screen-off state.
Optionally, after the screen in the screen-off state is lighted, the method further includes: judging whether the mobile terminal is still in the call process; under the condition that the mobile terminal is still in the conversation process, detecting whether the screen of the mobile terminal enters a screen-off state from a screen-on state; when the screen enters a screen-off state from a screen-on state, the current second external environment brightness is collected again through the optical sensor.
The method collects the current first external environment brightness when the mobile terminal is connected with a call, collects the current second external environment brightness according to the preset time interval when the screen of the mobile terminal is changed from a bright screen state to a dead screen state, compares the brightness ratio with the preset brightness ratio coefficient after collecting the brightness twice, and further judges the distance between the current mobile terminal and the ear of a user according to the brightness condition to control the brightness of the screen, the method accurately controls the brightness of the screen of the mobile terminal, the user experience is better, and the problems in the prior art are solved: when the LED infrared light sensation is used as a mobile phone call screen-off scheme, when the mobile phone is too close to the ear, the mobile phone can turn on the screen, and the user experience is low.
Drawings
Fig. 1 is a schematic diagram of a hardware structure of an optional mobile terminal for implementing various embodiments of the present invention;
FIG. 2 is a diagram of a wireless communication system for the mobile terminal shown in FIG. 1;
fig. 3 is a schematic structural diagram of a device for controlling screen brightness of a mobile terminal according to a first embodiment of the present invention;
fig. 4 is a schematic structural diagram of a preferred embodiment of a device for controlling screen brightness of a mobile terminal according to the present invention;
fig. 5 is a schematic diagram of a mobile terminal according to a second embodiment of the present invention;
fig. 6 is a flowchart of a method for controlling screen brightness of a mobile terminal according to a third embodiment of the present invention;
FIG. 7 is a diagram illustrating PS values and obstacle distances according to a fourth embodiment of the present invention;
fig. 8 is a flowchart of a method for controlling a screen of a mobile terminal according to a fourth embodiment of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
A mobile terminal implementing various embodiments of the present invention will now be described with reference to the accompanying drawings. In the following description, suffixes such as "module", "component", or "unit" used to denote elements are used only for facilitating the explanation of the present invention, and have no specific meaning in themselves. Thus, "module" and "component" may be used in a mixture.
The mobile terminal may be implemented in various forms. For example, the terminal described in the present invention may include a mobile terminal such as a mobile phone, a smart phone, a notebook computer, a digital broadcast receiver, a PDA (personal digital assistant), a PAD (tablet computer), a PMP (portable multimedia player), a navigation device, and the like, and a stationary terminal such as a digital TV, a desktop computer, and the like. In the following, it is assumed that the terminal is a mobile terminal. However, it will be understood by those skilled in the art that the configuration according to the embodiment of the present invention can be applied to a fixed type terminal in addition to elements particularly used for moving purposes.
Fig. 1 is a schematic hardware configuration of a mobile terminal implementing various embodiments of the present invention. Of course, the hardware structure of the mobile terminal will be fully described in the first embodiment of the present invention, and in the following embodiments, if the mobile terminal is also referred to, the hardware structure description in the first embodiment may also be used, and repeated explanation will not be performed in the following embodiments, and the following description should be applied to each embodiment of the present invention.
The mobile terminal 100 may include a wireless communication unit 110, an a/V (audio/video) input unit 120, a user input unit 130, a sensing unit 140, an output unit 150, a memory 160, an interface unit 170, a controller 180, and a power supply unit 190, etc. Fig. 1 illustrates a mobile terminal having various components, but it is to be understood that not all illustrated components are required to be implemented. More or fewer components may alternatively be implemented. Elements of the mobile terminal will be described in detail below.
The wireless communication unit 110 typically includes one or more components that allow radio communication between the mobile terminal 100 and a wireless communication system or network. For example, the wireless communication unit may include at least one of a broadcast receiving module 111, a mobile communication module 112, a wireless internet module 113, a short-range communication module 114, and a location information module 115.
The broadcast receiving module 111 receives a broadcast signal and/or broadcast associated information from an external broadcast management server via a broadcast channel. The broadcast channel may include a satellite channel and/or a terrestrial channel. The broadcast management server may be a server that generates and transmits a broadcast signal and/or broadcast associated information or a server that receives a previously generated broadcast signal and/or broadcast associated information and transmits it to a terminal. The broadcast signal may include a TV broadcast signal, a radio broadcast signal, a data broadcast signal, and the like. Also, the broadcast signal may further include a broadcast signal combined with a TV or radio broadcast signal. The broadcast associated information may also be provided via a mobile communication network andand in this case, the broadcast associated information may be received by the mobile communication module 112. The broadcast signal may exist in various forms, for example, it may exist in the form of an Electronic Program Guide (EPG) of Digital Multimedia Broadcasting (DMB), an Electronic Service Guide (ESG) of digital video broadcasting-handheld (DVB-H), and the like. The broadcast receiving module 111 may receive a signal broadcast by using various types of broadcasting systems. In particular, the broadcast receiving module 111 may receive a broadcast signal by using a signal such as multimedia broadcasting-terrestrial (DMB-T), digital multimedia broadcasting-satellite (DMB-S), digital video broadcasting-handheld (DVB-H), forward link media (MediaFLO)@) A digital broadcasting system of a terrestrial digital broadcasting integrated service (ISDB-T), etc. receives digital broadcasting. The broadcast receiving module 111 may be constructed to be suitable for various broadcasting systems that provide broadcast signals as well as the above-mentioned digital broadcasting systems. The broadcast signal and/or broadcast associated information received via the broadcast receiving module 111 may be stored in the memory 160 (or other type of storage medium).
The mobile communication module 112 transmits and/or receives radio signals to and/or from at least one of a base station (e.g., access point, node B, etc.), an external terminal, and a server. Such radio signals may include voice call signals, video call signals, or various types of data transmitted and/or received according to text and/or multimedia messages.
The wireless internet module 113 supports wireless internet access of the mobile terminal. The module may be internally or externally coupled to the terminal. The wireless internet access technology to which the module relates may include WLAN (wireless LAN) (Wi-Fi), Wibro (wireless broadband), Wimax (worldwide interoperability for microwave access), HSDPA (high speed downlink packet access), and the like.
The short-range communication module 114 is a module for supporting short-range communication. Some examples of short-range communication technologies include bluetoothTMRadio Frequency Identification (RFID), infrared data association (IrDA), Ultra Wideband (UWB), zigbeeTMAnd so on.
The location information module 115 is a module for checking or acquiring location information of the mobile terminal. A typical example of the location information module is a GPS (global positioning system). According to the current technology, the GPS module 115 calculates distance information and accurate time information from three or more satellites and applies triangulation to the calculated information, thereby accurately calculating three-dimensional current location information according to longitude, latitude, and altitude. Currently, a method for calculating position and time information uses three satellites and corrects an error of the calculated position and time information by using another satellite. In addition, the GPS module 115 can calculate speed information by continuously calculating current position information in real time.
The a/V input unit 120 is used to receive an audio or video signal. The a/V input unit 120 may include a camera 121 and a microphone 122, and the camera 121 processes image data of still pictures or video obtained by an image capturing apparatus in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display unit 151. The image frames processed by the cameras 121 may be stored in the memory 160 (or other storage medium) or transmitted via the wireless communication unit 110, and two or more cameras 121 may be provided according to the construction of the mobile terminal. The microphone 122 may receive sounds (audio data) via the microphone in a phone call mode, a recording mode, a voice recognition mode, or the like, and can process such sounds into audio data. The processed audio (voice) data may be converted into a format output transmittable to a mobile communication base station via the mobile communication module 112 in case of a phone call mode. The microphone 122 may implement various types of noise cancellation (or suppression) algorithms to cancel (or suppress) noise or interference generated in the course of receiving and transmitting audio signals.
The user input unit 130 may generate key input data according to a command input by a user to control various operations of the mobile terminal. The user input unit 130 allows a user to input various types of information, and may include a keyboard, dome sheet, touch pad (e.g., a touch-sensitive member that detects changes in resistance, pressure, capacitance, and the like due to being touched), scroll wheel, joystick, and the like. In particular, when the touch pad is superimposed on the display unit 151 in the form of a layer, a touch screen may be formed.
The sensing unit 140 detects a current state of the mobile terminal 100 (e.g., an open or closed state of the mobile terminal 100), a position of the mobile terminal 100, presence or absence of contact (i.e., touch input) by a user with the mobile terminal 100, an orientation of the mobile terminal 100, acceleration or deceleration movement and direction of the mobile terminal 100, and the like, and generates a command or signal for controlling an operation of the mobile terminal 100. For example, when the mobile terminal 100 is implemented as a slide-type mobile phone, the sensing unit 140 may sense whether the slide-type phone is opened or closed. In addition, the sensing unit 140 can detect whether the power supply unit 190 supplies power or whether the interface unit 170 is coupled with an external device.
The interface unit 170 serves as an interface through which at least one external device is connected to the mobile terminal 100. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The identification module may store various information for authenticating a user using the mobile terminal 100 and may include a User Identity Module (UIM), a Subscriber Identity Module (SIM), a Universal Subscriber Identity Module (USIM), and the like. In addition, a device having an identification module (hereinafter, referred to as an "identification device") may take the form of a smart card, and thus, the identification device may be connected with the mobile terminal 100 via a port or other connection means. The interface unit 170 may be used to receive input (e.g., data information, power, etc.) from an external device and transmit the received input to one or more elements within the mobile terminal 100 or may be used to transmit data between the mobile terminal and the external device.
In addition, when the mobile terminal 100 is connected with an external cradle, the interface unit 170 may serve as a path through which power is supplied from the cradle to the mobile terminal 100 or may serve as a path through which various command signals input from the cradle are transmitted to the mobile terminal. Various command signals or power input from the cradle may be used as signals for recognizing whether the mobile terminal is accurately mounted on the cradle. The output unit 150 is configured to provide output signals (e.g., audio signals, video signals, alarm signals, vibration signals, etc.) in a visual, audio, and/or tactile manner. The output unit 150 may include a display unit 151, an audio output module 152, an alarm unit 153, and the like.
The display unit 151 may display information processed in the mobile terminal 100. For example, when the mobile terminal 100 is in a phone call mode, the display unit 151 may display a User Interface (UI) or a Graphical User Interface (GUI) related to a call or other communication (e.g., text messaging, multimedia file downloading, etc.). When the mobile terminal 100 is in a video call mode or an image capturing mode, the display unit 151 may display a captured image and/or a received image, a UI or GUI showing a video or an image and related functions, and the like.
Meanwhile, when the display unit 151 and the touch pad are overlapped with each other in the form of a layer to form a touch screen, the display unit 151 may serve as an input device and an output device. The display unit 151 may include at least one of a Liquid Crystal Display (LCD), a thin film transistor LCD (TFT-LCD), an Organic Light Emitting Diode (OLED) display, a flexible display, a three-dimensional (3D) display, and the like. Some of these displays may be configured to be transparent to allow a user to view from the outside, which may be referred to as transparent displays, and a typical transparent display may be, for example, a TOLED (transparent organic light emitting diode) display or the like. Depending on the particular desired implementation, the mobile terminal 100 may include two or more display units (or other display devices), for example, the mobile terminal may include an external display unit (not shown) and an internal display unit (not shown). The touch screen may be used to detect a touch input pressure as well as a touch input position and a touch input area.
The audio output module 152 may convert audio data received by the wireless communication unit 110 or stored in the memory 160 into an audio signal and output as sound when the mobile terminal is in a call signal reception mode, a call mode, a recording mode, a voice recognition mode, a broadcast reception mode, or the like. Also, the audio output module 152 may provide audio output related to a specific function performed by the mobile terminal 100 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output module 152 may include a speaker, a buzzer, and the like.
The alarm unit 153 may provide an output to notify the mobile terminal 100 of the occurrence of an event. Typical events may include call reception, message reception, key signal input, touch input, and the like. In addition to audio or video output, the alarm unit 153 may provide output in different ways to notify the occurrence of an event. For example, the alarm unit 153 may provide an output in the form of vibration, and when a call, a message, or some other incoming communication (incomingmunication) is received, the alarm unit 153 may provide a tactile output (i.e., vibration) to inform the user thereof. By providing such a tactile output, the user can recognize the occurrence of various events even when the user's mobile phone is in the user's pocket. The alarm unit 153 may also provide an output notifying the occurrence of an event via the display unit 151 or the audio output module 152.
The memory 160 may store software programs and the like for processing and controlling operations performed by the controller 180, or may temporarily store data (e.g., a phonebook, messages, still images, videos, and the like) that has been or will be output. Also, the memory 160 may store data regarding various ways of vibration and audio signals output when a touch is applied to the touch screen.
The memory 160 may include at least one type of storage medium including a flash memory, a hard disk, a multimedia card, a card-type memory (e.g., SD or DX memory, etc.), a Random Access Memory (RAM), a Static Random Access Memory (SRAM), a read-only memory (ROM), an electrically erasable programmable read-only memory (EEPROM), a programmable read-only memory (PROM), a magnetic memory, a magnetic disk, an optical disk, and the like. Also, the mobile terminal 100 may cooperate with a network storage device that performs a storage function of the memory 160 through a network connection.
The controller 180 generally controls the overall operation of the mobile terminal. For example, the controller 180 performs control and processing related to voice calls, data communications, video calls, and the like. In addition, the controller 180 may include a multimedia module 181 for reproducing (or playing back) multimedia data, and the multimedia module 181 may be constructed within the controller 180 or may be constructed separately from the controller 180. The controller 180 may perform a pattern recognition process to recognize a handwriting input or a picture drawing input performed on the touch screen as a character or an image.
The power supply unit 190 receives external power or internal power and provides appropriate power required to operate various elements and components under the control of the controller 180.
The various embodiments described herein may be implemented in a computer-readable medium using, for example, computer software, hardware, or any combination thereof. For a hardware implementation, the embodiments described herein may be implemented using at least one of an Application Specific Integrated Circuit (ASIC), a Digital Signal Processor (DSP), a Digital Signal Processing Device (DSPD), a Programmable Logic Device (PLD), a Field Programmable Gate Array (FPGA), a processor, a controller, a microcontroller, a microprocessor, an electronic unit designed to perform the functions described herein, and in some cases, such embodiments may be implemented in the controller 180. For a software implementation, the implementation such as a process or a function may be implemented with a separate software module that allows performing at least one function or operation. The software codes may be implemented by software applications (or programs) written in any suitable programming language, which may be stored in the memory 160 and executed by the controller 180.
Up to this point, mobile terminals have been described in terms of their functionality. Hereinafter, a slide-type mobile terminal among various types of mobile terminals, such as a folder-type, bar-type, swing-type, slide-type mobile terminal, and the like, will be described as an example for the sake of brevity. Accordingly, the present invention can be applied to any type of mobile terminal, and is not limited to a slide type mobile terminal.
The mobile terminal 100 as shown in fig. 1 may be configured to operate with communication systems such as wired and wireless communication systems and satellite-based communication systems that transmit data via frames or packets.
A communication system in which a mobile terminal according to the present invention is operable will now be described with reference to fig. 2.
Such communication systems may use different air interfaces and/or physical layers. For example, the air interface used by the communication system includes, for example, Frequency Division Multiple Access (FDMA), Time Division Multiple Access (TDMA), Code Division Multiple Access (CDMA), and Universal Mobile Telecommunications System (UMTS) (in particular, Long Term Evolution (LTE)), global system for mobile communications (GSM), and the like. By way of non-limiting example, the following description relates to a CDMA communication system, but such teachings are equally applicable to other types of systems.
Referring to fig. 2, the CDMA wireless communication system may include a plurality of mobile terminals 100, a plurality of Base Stations (BSs) 270, Base Station Controllers (BSCs) 275, and a Mobile Switching Center (MSC) 280. The MSC280 is configured to interface with a Public Switched Telephone Network (PSTN) 290. The MSC280 is also configured to interface with a BSC275, which may be coupled to the base station 270 via a backhaul. The backhaul may be constructed according to any of several known interfaces including, for example, E1/T1, ATM, IP, PPP, frame Relay, HDSL, ADSL, or xDSL. It will be understood that a system as shown in fig. 2 may include multiple BSCs 275.
Each BS270 may serve one or more sectors (or regions), each sector covered by a multi-directional antenna or an antenna pointing in a particular direction being radially distant from the BS 270. Alternatively, each partition may be covered by two or more antennas for diversity reception. Each BS270 may be configured to support multiple frequency allocations, with each frequency allocation having a particular frequency spectrum (e.g., 1.25MHz,5MHz, etc.).
The intersection of partitions with frequency allocations may be referred to as a CDMA channel. The BS270 may also be referred to as a Base Transceiver Subsystem (BTS) or other equivalent terminology. In such a case, the term "base station" may be used to generically refer to a single BSC275 and at least one BS 270. The base stations may also be referred to as "cells". Alternatively, each sector of a particular BS270 may be referred to as a plurality of cell sites.
As shown in fig. 2, a Broadcast Transmitter (BT)295 transmits a broadcast signal to the mobile terminal 100 operating within the system. A broadcast receiving module 111 as shown in fig. 1 is provided at the mobile terminal 100 to receive a broadcast signal transmitted by the BT 295. In fig. 2, several Global Positioning System (GPS) satellites 300 are shown. The satellite 300 assists in locating at least one of the plurality of mobile terminals 100.
In fig. 2, a plurality of satellites 300 are depicted, but it is understood that useful positioning information may be obtained with any number of satellites. The GPS module 115 as shown in fig. 1 is generally configured to cooperate with satellites 300 to obtain desired positioning information. Other techniques that can track the location of the mobile terminal may be used instead of or in addition to GPS tracking techniques. In addition, at least one GPS satellite 300 may selectively or additionally process satellite DMB transmission.
As a typical operation of the wireless communication system, the BS270 receives reverse link signals from various mobile terminals 100. The mobile terminal 100 is generally engaged in conversations, messaging, and other types of communications. Each reverse link signal received by a particular base station 270 is processed within the particular BS 270. The obtained data is forwarded to the associated BSC 275. The BSC provides call resource allocation and mobility management functions including coordination of soft handoff procedures between BSs 270. The BSCs 275 also route the received data to the MSC280, which provides additional routing services for interfacing with the PSTN 290. Similarly, the PSTN290 interfaces with the MSC280, the MSC interfaces with the BSCs 275, and the BSCs 275 accordingly control the BS270 to transmit forward link signals to the mobile terminal 100.
Based on the above mobile terminal hardware structure and communication system, the present invention provides various embodiments of the method.
As shown in fig. 3, a first embodiment of the present invention provides an apparatus for controlling screen brightness of a mobile terminal, the apparatus being disposed in the mobile terminal and comprising:
the acquisition module 10 is configured to acquire a current first external environment brightness when the mobile terminal connects a call; when the screen of the mobile terminal is changed from a bright screen state to a screen-off state, acquiring the current second external environment brightness according to a preset time interval;
the brightness judging module 20 is coupled with the collecting module 10 and is used for judging whether the ratio of the second external environment brightness to the first external environment brightness is smaller than a preset brightness proportion coefficient;
and the adjusting module 30 is coupled with the brightness judging module 20 and is used for keeping the screen in a screen-off state under the condition that the ratio is smaller than the preset brightness proportionality coefficient.
The above-mentioned acquisition module 10 according to the embodiment of the present invention can be implemented by a sensor, and since the ambient brightness is acquired, it can be implemented by a light sensor.
When there is a call incoming to the mobile terminal, the user may consider answering the call or not answering the call, if the user answers the call, it is possible to collect the current first external environment brightness before the call is connected, but if the user does not answer the call, it is a redundant operation if the current first external environment brightness is collected before the call is connected, and a load of a CPU of the mobile terminal is also increased.
When the user moves the mobile terminal from the front to the ear to receive the call through the handset during the period of time when the user is making the call, the current first ambient brightness can be collected during the period of time. Of course, during acquisition, it is best to acquire the data from the moment when the user connects the call, and no shielding exists in front of the optical sensor of the mobile terminal. Therefore, it may be set that the acquisition of the first external environment brightness is completed within a time period from the moment when the call is connected, for example, within 0.5 seconds from the moment when the call is connected.
After the first external environment brightness is collected, the user already closes the earphone of the mobile terminal to the ear, and after the mobile terminal is close to the ear, because the mobile terminal is provided with the distance sensor (the LED infrared sensor is selected in the embodiment), therefore, after the mobile terminal is close to the ear, the screen is changed from the on state to the off state, so as to prevent the mobile terminal from being too close to the ear of the user to cause misoperation when the user answers the call.
Because the embodiment of the invention aims to solve the problem that the screen is turned on when the distance measurement is inaccurate and the distance measurement is close to the ears in the existing LED infrared light sensing process, the current second external environment brightness can be acquired when the screen of the mobile terminal is changed from the screen-on state to the screen-off state.
The process of collecting the second external environment brightness may be collecting according to a predetermined time interval, but in order to ensure that the problem of inaccurate distance measurement in the infrared sensing of the LED can be solved, if the second external environment brightness is collected according to the predetermined time interval, the predetermined time interval needs to be set as short as possible, and in an optimal case, the second external environment brightness may be set to be collected in real time.
And then, making a ratio of the second external environment brightness acquired each time to the first external environment brightness to obtain a coefficient, and comparing the ratio with a preset brightness proportion coefficient.
Under the condition that the ratio is smaller than the preset brightness scale coefficient, the fact that shielding still exists in front of the mobile terminal is indicated, and therefore the screen is kept in a screen-off state by the adjusting module.
Under the condition that the ratio is larger than or equal to the preset brightness scale coefficient, the fact that the front sheltering object of the mobile terminal is far away or the sheltering does not exist is indicated, and therefore the screen in the screen-off state is lightened by the adjusting module.
The embodiment of the invention collects the current first external environment brightness when the mobile terminal is connected with a call, collects the current second external environment brightness according to the preset time interval when the screen of the mobile terminal is changed from a bright screen state to a dead screen state, compares the brightness ratio with the preset brightness ratio coefficient after collecting the brightness twice, further judges the distance between the current mobile terminal and the ear of a user according to the brightness condition, and further controls the on-off of the screen, the method accurately controls the on-off of the screen of the mobile terminal, the user experience is better, and the following problems in the prior art are solved: when the LED infrared light sensation is used as a mobile phone call screen-off scheme, when the mobile phone is too close to the ear, the mobile phone can turn on the screen, and the user experience is low.
In the implementation process, the acquisition module 10 may further include: the judging unit is used for judging whether the current infrared signal intensity is between a first preset intensity threshold value and a second preset intensity threshold value; and the acquisition unit is used for acquiring the current second external environment brightness under the condition that the infrared signal intensity is between the first preset intensity threshold value and the second preset intensity threshold value.
In a specific implementation, a person skilled in the art may set the function corresponding to the determination unit to be executed as a single functional module, or may set the corresponding function to be implemented in the brightness determination module.
Fig. 4 shows a preferred structural schematic diagram of the above device, which may further include: a call judging module 40, coupled to the adjusting module 30, for judging whether the mobile terminal is still in the call process; the detection module 50 is coupled with the call judgment module 40 and the acquisition module 10 and is used for detecting whether the screen of the mobile terminal enters a screen-off state from a screen-on state under the condition that the screen is still in the call process; the collecting module 10 is further configured to collect the current second external environment brightness when the screen enters the screen-off state from the screen-on state.
In general, after a user makes a call, the user takes the mobile terminal to the front and presses a hang-up key to hang up the call. In the process, once the user takes the mobile terminal away from the ear for a certain distance, the screen is lighted, at this time, the call judgment module 40 needs to judge whether the mobile terminal is still in the call process, in the detection process, the mobile terminal hangs up the call, all monitoring processes are ended, if the call of the mobile terminal is not hung up, but continues the call, at this time, it needs to detect whether the screen of the mobile terminal enters a screen-off state from a screen-on state, so as to control the screen on-off. When the screen of the mobile terminal is detected to enter the screen-off state from the screen-on state, the acquisition module 10 is required to acquire the current second external environment brightness again, and then the brightness of the screen is controlled by the brightness judgment module 20 and the adjustment module 30.
A second embodiment of the present invention provides a mobile terminal, which is schematically shown in fig. 5, and includes: a light sensor 1, a processor 2 and an LED infrared sensor 3 (as an internal structure of the mobile terminal, not shown in fig. 5).
Wherein, the light sensor 1 collects the brightness of the external environment; the LED infrared sensor 3 is used for acquiring the current infrared signal intensity so as to trigger the processor to control the screen of the mobile terminal to be changed from a screen-on state to a screen-off state according to the current infrared signal intensity; the processor 2 judges whether the brightness coefficient of the current external environment is smaller than a preset brightness proportion coefficient; under the condition that the brightness coefficient is smaller than the preset brightness scale coefficient, keeping the screen in a screen-off state; the brightness coefficient is a ratio of the second external environment brightness to the first external environment brightness, the first external environment brightness is the external environment brightness acquired by the optical sensor when the mobile terminal is connected for calling, and the second external environment brightness is the external environment brightness acquired by the optical sensor according to a preset time interval when the screen of the mobile terminal is changed from a bright screen state to a screen-off state.
After gathering first external environment luminance, the user has been close to the ear with mobile terminal's earphone this moment, and after being close to the ear, because mobile terminal has set up LED infrared sensor, consequently, after mobile terminal is close to the ear, the screen will become the state of disappearing by the state of lighting.
Because the embodiment of the invention aims to solve the problem that the screen is turned on when the distance measurement is inaccurate and the distance measurement is close to the ears in the existing LED infrared light sensing process, the current second external environment brightness can be acquired when the screen of the mobile terminal is changed from the screen-on state to the screen-off state.
The process of collecting the second external environment brightness may be collecting according to a predetermined time interval, but in order to ensure that the problem of inaccurate distance measurement in the infrared sensing of the LED can be solved, if the second external environment brightness is collected according to the predetermined time interval, the predetermined time interval needs to be set as short as possible, and in an optimal case, the second external environment brightness may be set to be collected in real time.
And then, making a ratio of the second external environment brightness acquired each time to the first external environment brightness to obtain a coefficient, and comparing the ratio with a preset brightness proportion coefficient. Each ratio is compared to a predetermined luminance scaling factor. If the ratio is smaller than the preset brightness scale coefficient, the fact that shielding exists in front of the mobile terminal is indicated, and therefore the screen is kept in a screen-off state by the adjusting module. If the ratio is larger than or equal to the preset brightness scale coefficient, the front shelter of the mobile terminal is far away or does not exist, and therefore the adjusting module lights the screen in the screen-off state.
In specific implementation, the processor 3 is specifically configured to determine whether the current infrared signal intensity is between a first preset intensity threshold and a second preset intensity threshold after the light sensor collects the first external environment brightness; and under the condition that the intensity of the infrared signal is between a first preset intensity threshold value and a second preset intensity threshold value, triggering the light sensor to acquire second external environment brightness.
In general, after a user makes a call, the user takes the mobile terminal to the front and presses a hang-up key to hang up the call. In the process, once the user takes the mobile terminal away from the ear for a certain distance, the screen is lighted, at the moment, the processor can also judge whether the mobile terminal is still in the conversation process, in the detection process, the mobile terminal hangs up the conversation, all monitoring processes are ended, if the conversation of the mobile terminal is not hung up, but continues to be in the conversation, at the moment, whether the screen of the mobile terminal enters the screen-off state from the screen-on state or not needs to be detected, and the screen is conveniently controlled to be lighted or extinguished. When the screen of the mobile terminal is detected to enter a screen-off state from a screen-on state, the current second external environment brightness needs to be collected again, and then the screen brightness is controlled through the processor.
A third embodiment of the present invention provides a method for controlling screen brightness of a mobile terminal, where the flow of the method is shown in fig. 6, and the method includes steps S602 to S608:
s602, when the mobile terminal is connected with a call, acquiring the current first external environment brightness through the optical sensor;
s604, when the screen of the mobile terminal is changed from a bright screen state to a dead screen state, acquiring the current second external environment brightness through the optical sensor according to a preset time interval;
s606, judging whether the ratio of the second external environment brightness to the first external environment brightness is smaller than a preset brightness proportion coefficient;
and S608, keeping the screen in a screen-off state under the condition that the ratio is smaller than the preset brightness scale coefficient.
The embodiment of the invention collects the current first external environment brightness when the mobile terminal is connected with a call, collects the current second external environment brightness according to the preset time interval when the screen of the mobile terminal is changed from a bright screen state to a dead screen state, compares the brightness ratio with the preset brightness ratio coefficient after collecting the brightness twice, further judges the distance between the current mobile terminal and the ear of a user according to the brightness condition, and further controls the on-off of the screen, the method accurately controls the on-off of the screen of the mobile terminal, the user experience is better, and the following problems in the prior art are solved: when the LED infrared light sensation is used as a mobile phone call screen-off scheme, when the mobile phone is too close to the ear, the mobile phone can turn on the screen, and the user experience is low.
After gathering first external environment luminance, the user has been close to the ear with mobile terminal's earphone this moment, and after being close to the ear, because mobile terminal has set up LED infrared sensor (one kind of distance sensor), consequently, after mobile terminal is close to the ear, the screen will become the state of disappearing by the light state.
Because the embodiment of the invention aims to solve the problem that the screen is turned on when the distance measurement is inaccurate and the distance measurement is close to the ears in the existing LED infrared light sensing process, the current second external environment brightness can be acquired when the screen of the mobile terminal is changed from the screen-on state to the screen-off state.
The process of collecting the second external environment brightness may be collecting according to a predetermined time interval, but in order to ensure that the problem of inaccurate distance measurement in the infrared sensing of the LED can be solved, if the second external environment brightness is collected according to the predetermined time interval, the predetermined time interval needs to be set as short as possible, and in an optimal case, the second external environment brightness may be set to be collected in real time.
In the implementation process, when the current second external environment brightness is acquired through the optical sensor, whether the current infrared signal intensity is between a first preset intensity threshold and a second preset intensity threshold is judged at first; if the infrared signal intensity is between the first preset intensity threshold and the second preset intensity threshold, it indicates that the screen in the screen-off state may suddenly turn on at this time, and therefore, the current second external environment brightness needs to be collected by the optical sensor. The first preset intensity threshold and the second preset intensity threshold are screen mistaken lighting areas of the LED infrared sensor when the screen is in a screen off state.
And after judging whether the ratio of the second external environment brightness to the first external environment brightness is smaller than a preset brightness proportion coefficient or not, if the ratio is larger than or equal to the preset brightness proportion coefficient, lightening the screen in a screen-off state.
Continuously monitoring the mobile terminal and judging whether the mobile terminal is still in the call process; and if the mobile terminal is still in the conversation process, detecting whether the screen of the mobile terminal enters a screen-off state from a screen-on state, and acquiring the current second external environment brightness through the optical sensor again when the screen enters the screen-off state from the screen-on state.
According to the embodiment of the invention, when the mobile terminal is connected with a call, the current infrared signal intensity is acquired in real time, and if the current infrared signal intensity is greater than a first preset intensity threshold value, the mobile phone is controlled to be turned off; if the current infrared signal intensity is smaller than a second preset intensity threshold value, controlling the mobile phone to be on; if the PS value is between the first preset intensity threshold and the second preset intensity threshold, comparing the current brightness ratio with a preset brightness proportion coefficient, and further judging the distance between the current mobile terminal and the ears of the user according to the brightness condition so as to control the on-off of the screen.
The fourth embodiment of the invention provides a control method of a mobile terminal screen, which is used for solving the problem of misoperation in a screen mistakenly-lighting area of a mobile phone.
Since the received infrared signal intensity does not form a monotonic curve with the distance, as shown in fig. 7, when the distance is within 0.6cm, the infrared signal intensity (PS value) decreases with the decrease of the distance, so if the LED infrared sensor is used as the screen-off scheme for the mobile phone call, when the mobile phone is too close to the ear, the mobile phone will turn on the screen, which is a cause of malfunction, resulting in low user experience.
The flow of the control method of the mobile terminal screen provided by the embodiment of the invention is shown in fig. 8, and includes steps S801 to S810:
s801, the mobile terminal receives an incoming call.
S802, when the user answers the call, the light brightness value ALS1 when the light sensor is not provided with the obstruction is obtained.
And S803, acquiring the light brightness value ALS0 of the light sensor when the screen is changed from the bright screen state to the off screen state in the process of answering the call.
And S804, determining the PS value of the LED infrared sensor.
S805, whether the PS value is larger than a threshold value A is judged. If so, S809 is performed, otherwise S806 is performed.
S806, judging whether the PS value is between the threshold A and the threshold B. If so, S807 is performed, otherwise S808 is performed.
S807, judging whether the light brightness coefficient ALS0/ALS1 is smaller than a preset coefficient value. If so, S809 is performed, otherwise S808 is performed.
And S808, lighting the screen of the mobile phone.
And S809, turning off the screen of the mobile phone.
And S810, ending the call.
For specific setting, an infrared signal intensity threshold value A can be set to be 40, an infrared signal intensity threshold value B can be set to be 23, and when the infrared signal intensity is higher than 40, the mobile phone is judged to be close to the ear, and the mobile phone is turned off; meanwhile, if the infrared signal intensity is between the threshold value A and the threshold value B, namely the infrared signal intensity is 23-40, the mobile phone is likely to be very close to the ear, and the mobile phone is likely to be far away from the ear; at this time, the light brightness value ALS0 of the light sensor and the light brightness value ALS1 of the mobile phone brightness sensor without a barrier are judged, if the coefficient of the light brightness value ratio (ALS0/ALS1) is less than 0.3 (namely the preset coefficient value, the coefficient can be obtained through a plurality of experimental tests), the mobile phone is judged to be still close to the ear and the screen is turned off; if the coefficient of the light brightness value ratio (ALS0/ALS1) is larger than 0.3 (the coefficient can be obtained through a plurality of experimental tests), the mobile phone is judged to be far away from the ear, the mobile phone is lightened, the misoperation of the area A is solved, and the user experience is improved.
In the process of realizing the above process, the brightness value can also be directly compared, that is, when the PS value is between the threshold A and the threshold B, the brightness value of the environment light is detected at the same time, if the brightness value is within the threshold 45 (the threshold can be obtained by a plurality of tests), the mobile phone is judged to be still close to the ear and the screen is turned off; if the brightness value is outside the threshold 45 (which can be obtained through many experimental tests), it is determined that the mobile phone is bright when away from the ear.
The threshold value A, B can be adjusted according to the actual low noise of the mobile phone, and the background noise value N can be read in real time without shielding0Reading the 30mm occlusion time value of the gray card, subtracting the background noise value to obtain a variation value △, and setting a threshold A as N0+ △, with a threshold B of N0+ △ -T, T being the difference between the initial threshold A and the threshold B.
The embodiment of the invention obtains the PS value in real time when the mobile terminal connects the call, and controls the mobile phone to turn off the screen if the PS value is larger than a preset threshold value A; if the PS value is smaller than a preset threshold value B, controlling the mobile phone to be on; and if the PS value is between the preset threshold A and the preset threshold B, comparing the current brightness ratio with a preset brightness proportion coefficient, and further judging the distance between the current mobile terminal and the ears of the user according to the brightness condition so as to control the on-off of the screen.
The embodiment of the invention can solve the problem of mistaken screen lighting operation caused by the fact that a user answers a telephone when the LED infrared sensor is used and the mobile phone is too close to the ear.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (10)

1. A control device for screen brightness of a mobile terminal is characterized by comprising:
the acquisition module is used for acquiring the current first external environment brightness when the mobile terminal is connected with a call; when the screen of the mobile terminal is changed from a bright screen state to a screen-off state, acquiring the current second external environment brightness according to a preset time interval;
the brightness judging module is used for judging whether the ratio of the second external environment brightness to the first external environment brightness is smaller than a preset brightness proportion coefficient or not;
and the adjusting module is used for keeping the screen in a screen-off state under the condition that the ratio is smaller than the preset brightness scale coefficient.
2. The apparatus for controlling screen brightness of a mobile terminal according to claim 1, wherein the collecting module comprises:
the judging unit is used for judging whether the current infrared signal intensity is between a first preset intensity threshold value and a second preset intensity threshold value;
and the acquisition unit is used for acquiring the current second external environment brightness under the condition that the infrared signal intensity is between the first preset intensity threshold and the second preset intensity threshold.
3. The device for adjusting screen brightness of mobile terminal according to claim 1 or 2,
the adjusting module is further configured to light the screen in the screen-off state when the ratio is greater than or equal to the preset brightness scale coefficient.
4. The apparatus for controlling screen brightness of a mobile terminal according to claim 3, further comprising:
the call judging module is used for judging whether the mobile terminal is still in the call process;
the mobile terminal comprises a detection module, a display module and a display module, wherein the detection module is used for detecting whether a screen of the mobile terminal enters a screen-off state from a screen-on state under the condition that the mobile terminal is still in a call process;
the acquisition module is further used for collecting the current second external environment brightness when the screen enters a screen-off state from a screen-on state.
5. A mobile terminal, comprising:
the system comprises a light sensor, a processor and an LED infrared sensor; wherein,
the light sensor is used for acquiring the brightness of the external environment;
the LED infrared sensor acquires the current infrared signal intensity to trigger the processor to control the screen of the mobile terminal to be changed from a bright screen state to a dead screen state according to the current infrared signal intensity;
the processor judges whether the brightness coefficient of the current external environment is smaller than a preset brightness proportion coefficient or not; under the condition that the brightness coefficient is smaller than the preset brightness proportion coefficient, keeping the screen in a screen-off state;
the brightness coefficient is a ratio of a second external environment brightness to a first external environment brightness, the first external environment brightness is the external environment brightness acquired by the optical sensor when the mobile terminal is connected to a call, and the second external environment brightness is the external environment brightness acquired by the optical sensor according to a preset time interval when a screen of the mobile terminal is changed from a bright screen state to a screen-off state.
6. The mobile terminal of claim 5,
the processor is specifically configured to determine whether the current infrared signal intensity is between a first preset intensity threshold and a second preset intensity threshold after the light sensor collects the first external environment brightness; and under the condition that the intensity of the infrared signal is between the first preset intensity threshold value and the second preset intensity threshold value, triggering the optical sensor to acquire the second external environment brightness.
7. A method for controlling screen brightness of a mobile terminal is characterized by comprising the following steps:
when the mobile terminal is connected with a call, acquiring the current first external environment brightness through the optical sensor;
when the screen of the mobile terminal is changed from a bright screen state to a screen-off state, acquiring the current second external environment brightness through the optical sensor according to a preset time interval;
judging whether the ratio of the second external environment brightness to the first external environment brightness is smaller than a preset brightness proportion coefficient or not;
and under the condition that the ratio is smaller than the preset brightness scale coefficient, keeping the screen in a screen-off state.
8. The method for controlling screen brightness of a mobile terminal according to claim 7, wherein the step of collecting the current second external environment brightness by the light sensor comprises:
judging whether the current infrared signal intensity is between a first preset intensity threshold value and a second preset intensity threshold value;
and acquiring the current second external environment brightness through the optical sensor under the condition that the infrared signal intensity is between the first preset intensity threshold and the second preset intensity threshold.
9. The method for controlling screen brightness of a mobile terminal according to claim 7 or 8, wherein after determining whether the ratio of the second external environment brightness to the first external environment brightness is smaller than a preset brightness scaling factor, the method further comprises:
and under the condition that the ratio is greater than or equal to the preset brightness scale coefficient, lightening the screen in a screen-off state.
10. The method for controlling screen brightness of a mobile terminal according to claim 9, further comprising, after lighting the screen in a screen-off state:
judging whether the mobile terminal is still in the call process;
under the condition that the mobile terminal is still in the conversation process, detecting whether the screen of the mobile terminal enters a screen-off state from a screen-on state;
when the screen enters a screen-off state from a screen-on state, the current second external environment brightness is collected again through the optical sensor.
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