CN105872264A - Backlight brightness adjusting method and mobile terminal - Google Patents

Abstract

Embodiments of the present invention provide a method for adjusting backlight brightness and a mobile terminal, wherein the method includes: obtaining the target screen brightness of the display screen to be achieved when the mobile terminal is in the current environment and takes pictures through the front camera; According to the brightness of the target screen, it is determined that when the backlight efficiency of the display screen of the mobile terminal is maximum, multiple LED lamps in a lit state are required; and the multiple LED lamps in the display screen of the mobile terminal are controlled to be in a lit state. The embodiments of the present invention can improve the efficiency of the backlight when using the display screen to take pictures with supplementary light, prevent human eyes from being irritated in a bright environment, and improve user experience.

Description

Method for adjusting backlight brightness and mobile terminal

technical field

The invention relates to the field of electronic technology, in particular to a method for adjusting the brightness of a backlight and a mobile terminal.

Background technique

With the continuous development of science and technology and the improvement of people's living standards, cameras are used more and more frequently. Among them, supplementary lighting is usually required when taking pictures in low-light usage scenarios. Fill light refers to the light source located on or near the axis of the camera and used for general illumination of the subject. Its purpose is to obtain proper exposure for the details of the shadow.

Among them, when using the mobile terminal display screen to fill in the light for selfies, in order to increase the brightness of the display screen, a lot of work needs to be done on the light-emitting diode (LED) lamp and the backlight integrated circuit (IC, integrated circuit) that supplies power to the backlight, and once the hardware is set , the light level of the photo is determined. In the specific light supplement process, the brightness is adjusted to the highest level, that is, the light is supplemented under the condition that the backlight ic current is fixed. This method leads to very low backlight efficiency. In addition, when the brightness of the environment where the mobile terminal is located is not very dim, the effect of using the display screen as a flash fill-in light is not good when the fixed current is used for Selfie. Big stimuli degrade user experience.

To sum up, when the backlight ic current is fixed, when using the display screen to fill in the light to take pictures, the backlight efficiency is low, and it irritates the human eye in a bright environment, affecting the user experience.

Contents of the invention

The purpose of the embodiments of the present invention is to provide a method for adjusting the brightness of a backlight and a mobile terminal, aiming at solving the problem that the backlight efficiency is low, and it irritates human eyes in a bright environment and affects user experience when using a display screen to supplement light to take pictures.

In order to achieve the above purpose, an embodiment of the present invention provides a method for adjusting the brightness of a backlight, including:

Acquiring the target screen brightness of the display screen to be achieved when the mobile terminal takes pictures through the front camera in the current environment;

According to the brightness of the target screen, when it is determined that the backlight efficiency of the display screen of the mobile terminal is the maximum, multiple LED lamps in a lit state are required;

Control the multiple LED lamps on the display screen of the mobile terminal to be on.

Embodiments of the present invention also provide a mobile terminal, including:

The obtaining module is used to obtain the target screen brightness to be achieved by the display screen when the mobile terminal takes pictures through the front camera in the current environment;

The determining module is used to determine, according to the brightness of the target screen, when the backlight efficiency of the display screen of the mobile terminal is maximum, a plurality of LED lamps that need to be lit;

The control module is used to control multiple LED lamps in the display screen of the mobile terminal to be in a lighting state.

Above-mentioned scheme of the present invention comprises following beneficial effect at least:

In the embodiment of the present invention, by obtaining the target screen brightness of the display screen when the mobile terminal takes pictures through the front camera in the current environment, it is determined that when the backlight efficiency of the display screen of the mobile terminal is maximum, the point Multiple LED lights in the bright state, and control the multiple LED lights to be in the lit state, solve the problem that the backlight efficiency is low when using the display screen for supplementary light photography, and it irritates the human eye in a bright environment and affects the user experience. It achieves the effect of improving backlight efficiency, preventing human eyes from being irritated in a bright environment, and improving user experience when using the display screen for supplementary light photography.

Description of drawings

FIG. 1 is a flowchart of a method for adjusting backlight brightness in a first embodiment of the present invention;

2 is a schematic diagram of the backlight efficiency of the mobile terminal in the first embodiment of the present invention;

3 is one of the schematic diagrams of LED lights in the display screen of the mobile terminal in the first embodiment of the present invention;

Fig. 4 is the second schematic diagram of LED lights in the display screen of the mobile terminal in the first embodiment of the present invention;

5 is a flow chart of a method for adjusting the brightness of the backlight in the second embodiment of the present invention;

FIG. 6 is a schematic diagram of a mobile terminal in a third embodiment of the present invention;

FIG. 7 is a schematic diagram of a mobile terminal in a fourth embodiment of the present invention;

Fig. 8 is a schematic diagram of a mobile terminal in a fifth embodiment of the present invention.

detailed description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

first embodiment

As shown in Figure 1, the first embodiment of the present invention provides a method for adjusting the brightness of a backlight, the method comprising:

Step 101 , acquiring the target screen brightness to be achieved by the display screen when the mobile terminal takes pictures through the front camera in the current environment.

Wherein, the above-mentioned mobile terminal may be a smart phone, a tablet computer and other devices.

In the first embodiment of the present invention, in order to meet the user's operating habits, a switch button for dynamically supplementing light according to environmental information can be added in the settings of the mobile terminal, and the above steps will be executed only when the button is in the on state 101.

Step 102 , according to the target screen brightness, it is determined that when the backlight efficiency of the display screen of the mobile terminal is maximum, a plurality of LED lamps need to be on.

In the first embodiment of the present invention, according to the correspondence between the pre-stored screen brightness and the backlight efficiency of the display screen of the mobile terminal, it can be determined that when the backlight efficiency corresponding to the target screen brightness is maximum, it needs to be on. Multiple LED lights. The plurality of LED lights may include multiple strings of LED lights connected in parallel, and each string of LED lights includes a plurality of LED lights connected in series.

Wherein, the same screen brightness may correspond to multiple backlight efficiencies, and each backlight efficiency corresponds to an LED light combination that needs to be lit (the LED light combination includes the above-mentioned multiple LED lights). Therefore, in order to maximize the backlight efficiency, it is necessary to determine the maximum backlight efficiency corresponding to the target screen brightness, and determine the corresponding LED light combination when the backlight efficiency is maximum.

In the first embodiment of the present invention, a large number of experiments show that, as shown in FIG. 2 , the backlight efficiency of the mobile terminal under heavy load is higher than that under light load. Wherein, the current of a single string of LED lights in the display screen of the mobile terminal under heavy load is greater than the current of the single string of LED lights in the display screen of the mobile terminal under light load; The number of LED lamps that are on in the display screen of the mobile terminal under the load condition is smaller than the number of LED lamps that are on in the display screen of the mobile terminal under the light load condition. Wherein, the abscissa in Fig. 2 represents the percentage of screen brightness; the ordinate represents the backlight efficiency; the solid line represents that when the number of LED lights in the display screen of the mobile terminal is 16 (that is, the mobile terminal is under heavy load ) when the backlight efficiency changes with the brightness of the screen; the dotted line indicates that the backlight efficiency varies with the brightness of the screen when the number of LED lights in the display screen of the mobile terminal is 10 (that is, the mobile terminal is under a light load condition) schematic diagram.

It should be noted that when using the display screen of the mobile terminal to take photos with supplementary light, the mobile terminal will dynamically determine the target screen brightness that the display screen of the mobile terminal needs to achieve when taking pictures according to the current environment of the mobile terminal, and then determine the brightness that needs to be turned on. There are multiple LED lights in the state, and because the fewer the number of LED lights, the greater the current of a single string of LED lights, so as to achieve dynamic fill light instead of fixed current fill light.

Step 103, controlling multiple LED lights on the display screen of the mobile terminal to be on.

In the first embodiment of the present invention, step 103 includes the following steps:

In the first step, according to the correspondence between the pre-stored screen brightness and the backlight efficiency of the display screen of the mobile terminal, the current of each LED light string is determined when the backlight efficiency corresponding to the target screen brightness is maximum. Wherein, the current of each LED light string in the display screen of the mobile terminal is the same.

In the first embodiment of the present invention, the same screen brightness may correspond to multiple backlight efficiencies, and each backlight efficiency corresponds to a single string current (that is, the current of each LED light string mentioned above). Therefore, the current of each LED light string can be determined according to the target screen brightness when the backlight efficiency corresponding to the target screen brightness is maximum.

The second step is to control multiple LED lights on the display screen of the mobile terminal to be on by controlling the I/O port of each LED light on the display screen of the mobile terminal according to the current of each LED light string. Wherein, each LED lamp string includes a plurality of LED lamps connected in series.

In the first embodiment of the present invention, the above-mentioned second step is described with two specific examples.

In the first example, it is assumed that there are 3 strings of LED lights in the display screen of the mobile terminal, and in order to maximize the backlight efficiency, only 2 strings of LED lights (assumed to be the first string and the second string) need to be on. Yes, that is, it is equivalent to controlling the third string of LED lights to be in the extinguished state. At this time, by controlling the general I/O port on the third string of LED lights, the third string of LED lights can be controlled to be in the extinguished state. Specifically, as shown in FIG. 3 , by controlling the closing of the MOS tube 301 on the third string of LED lights through the general I/O port on the third string of LED lights, the third string of LED lights can be controlled to be in the extinguished state. Wherein, the total I/O port on the third string of LED lamps can control each LED lamp on the third string of LED lamps, and is connected to the I/O port of each LED lamp on the third string of LED lamps.

In the second example, it is assumed that there are 3 strings of LED lights in the display screen of the mobile terminal, each string of LED lights includes 10 LED lights, and in order to maximize the backlight efficiency, only 8 LED lights in each string should be on. The LED lamps need only be extinguished, that is, two LED lamps on each string of LED lamps need to be in the extinguished state. At this time, by controlling the I/O port of the LED lamp that needs to be turned off, it can be controlled to be turned off. Specifically, as shown in Figure 4, the MOS tube is controlled through an I/O port (the I/O port can control the LED lamp that needs to be in the extinguished state, and it is connected to the I/O port of the LED lamp that needs to be in the extinguished state). 401 is closed to short-circuit two LED lights on each string of LED lights to make them go out.

In the first embodiment of the present invention, according to the target screen brightness to be achieved by the display screen when the mobile terminal takes pictures through the front camera in the current environment, it is determined that when the backlight efficiency of the display screen of the mobile terminal is maximum, it needs A plurality of LED lamps in a lighting state and the current of each string of LED lamps are controlled to be in a lighting state according to the current of each string of LED lamps, thereby improving backlight efficiency. And when the user takes a selfie in a bright environment (that is, not a very dark environment) with the mobile terminal, the brightness of the display screen of the mobile terminal will not irritate the human eyes, thereby improving the user experience.

second embodiment

As shown in Figure 5, the second embodiment of the present invention provides a method for adjusting the brightness of the backlight, the method comprising:

In step 501, the current environment brightness information of the environment where the mobile terminal is located when receiving the instruction of taking pictures by the front camera is acquired.

In the second embodiment of the present invention, the current ambient brightness information of the environment where the mobile terminal is located when receiving the instruction of taking pictures from the front camera can be acquired through the photosensitive sensor of the mobile terminal.

In the second embodiment of the present invention, in order to meet the user's operating habits, a switch button for dynamically supplementing light according to environmental information can be added in the settings of the mobile terminal, and the above steps will be executed only when the button is in the on state 501.

Step 502, according to the current ambient brightness information and the preset screen brightness, determine the target screen brightness to be achieved by the display screen when the mobile terminal takes pictures through the front camera.

In the second embodiment of the present invention, the target screen brightness corresponding to the current environment brightness information can be found out from the preset correspondence table between the screen brightness and the environment brightness information. It should be noted that the above correspondence table can be set by the user based on experience and stored in the mobile terminal.

Step 503 , according to the target screen brightness, it is determined that when the backlight efficiency of the display screen of the mobile terminal is maximum, a plurality of LED lamps need to be on.

In the second embodiment of the present invention, according to the correspondence between the pre-stored screen brightness and the backlight efficiency of the display screen of the mobile terminal, it can be determined that when the backlight efficiency corresponding to the target screen brightness is maximum, it needs to be on. Multiple LED lights.

Wherein, the same screen brightness may correspond to multiple backlight efficiencies, and each backlight efficiency corresponds to an LED light combination that needs to be lit (the LED light combination includes the above-mentioned multiple LED lights). Therefore, in order to maximize the backlight efficiency, it is necessary to determine the maximum backlight efficiency corresponding to the target screen brightness, and determine the corresponding LED light combination when the backlight efficiency is maximum.

Step 504, controlling multiple LED lights on the display screen of the mobile terminal to be on.

In the second embodiment of the present invention, step 504 includes the following steps:

In the first step, according to the correspondence between the pre-stored screen brightness and the backlight efficiency of the display screen of the mobile terminal, the current of each LED light string is determined when the backlight efficiency corresponding to the target screen brightness is maximum. Wherein, the current of each LED light string in the display screen of the mobile terminal is the same.

In the second embodiment of the present invention, the same screen brightness may correspond to multiple backlight efficiencies, and each backlight efficiency corresponds to a single string current (that is, the current of each LED light string mentioned above). Therefore, the current of each LED light string can be determined according to the target screen brightness when the backlight efficiency corresponding to the target screen brightness is maximum.

The second step is to control multiple LED lights on the display screen of the mobile terminal to be on by controlling the I/O port of each LED light on the display screen of the mobile terminal according to the current of each LED light string. Wherein, each LED lamp string includes a plurality of LED lamps connected in series.

In the second embodiment of the present invention, according to the current ambient brightness information of the environment where the mobile terminal receives the photographing instruction from the front camera, the target screen to be reached by the display screen when the mobile terminal takes pictures through the front camera is determined Brightness, and according to the brightness of the target screen, it is determined that when the backlight efficiency of the mobile terminal display screen is at its maximum, multiple LED lights and the current of each string of LED lights need to be lit, and the number of LED lights is controlled according to the current of each string of LED lights. Each LED light is on to improve the backlight efficiency. And when the user takes a selfie in a bright environment (that is, not a very dark environment) with the mobile terminal, the brightness of the display screen of the mobile terminal will not irritate the human eyes, thereby improving the user experience.

third embodiment

As shown in Figure 6, the third embodiment of the present invention provides a mobile terminal, the mobile terminal 600 includes: an acquisition module 601, a determination module 602 and a control module 603, and the determination module 602 is connected with the acquisition module 601 and the control module respectively 603 connection.

Wherein, the acquiring module 601 is configured to acquire the target screen brightness to be achieved by the display screen when the mobile terminal takes pictures through the front camera in the current environment.

Wherein, the above-mentioned mobile terminal 600 may be a smart phone, a tablet computer and other devices.

The determination module 602 is configured to determine, according to the target screen brightness, that a plurality of LED lights need to be on when the backlight efficiency of the display screen of the mobile terminal is maximum.

The control module 603 is configured to control multiple LED lights on the display screen of the mobile terminal to be on.

Optionally, the acquisition module 601 includes a first acquisition unit 6011 and a second acquisition unit 6012 connected to each other.

Wherein, the above-mentioned first acquiring unit 6011 is configured to acquire the current ambient brightness information of the environment where the mobile terminal is located when receiving the instruction of taking pictures by the front camera.

The second acquisition unit 6012 is configured to determine the target screen brightness to be achieved by the display screen when the mobile terminal takes pictures through the front camera according to the current environment brightness information and the preset screen brightness.

Optionally, the above-mentioned second acquiring unit 6012 is further configured to find out the target screen brightness corresponding to the current environment brightness information from the preset correspondence table between screen brightness and environment brightness information.

Optionally, the above-mentioned first acquiring unit 6011 is further configured to acquire the current ambient brightness information of the environment where the mobile terminal is located when receiving the photo-taking instruction from the front camera through the photosensitive sensor of the mobile terminal.

Optionally, the determination module 602 includes a determination unit 6021 .

The determining unit 6021 is configured to determine, according to the correspondence between the pre-stored screen brightness and the backlight efficiency of the display screen of the mobile terminal, when the backlight efficiency corresponding to the target screen brightness is maximum, a plurality of LED lights that need to be on .

Optionally, the control module 603 includes a first control unit 6031 and a second control unit 60332 connected to each other.

Wherein, the first control unit 6031 is used to determine the current of each LED light string when the backlight efficiency corresponding to the target screen brightness is maximum according to the correspondence between the pre-stored screen brightness and the backlight efficiency of the display screen of the mobile terminal. .

The second control unit 60332 is used to control multiple LED lights on the display screen of the mobile terminal to be on by controlling the I/O port of each LED light on the display screen of the mobile terminal according to the current of each LED light string.

Wherein, each LED lamp string includes a plurality of LED lamps connected in series.

In the third embodiment of the present invention, the mobile terminal 600 determines the maximum backlight efficiency of the display screen of the mobile terminal by obtaining the target screen brightness of the display screen when the mobile terminal takes pictures through the front camera in the current environment. At this time, a plurality of LED lamps in a lighting state are required, and the multiple LED lamps are controlled to be in a lighting state, which solves the problem that the backlight efficiency is low when the display screen is used to supplement the light to take pictures, and it irritates the human eye in a bright environment and affects the The problem of user experience has achieved the effect of improving the backlight efficiency when using the display screen to fill in the light to take pictures, preventing human eyes from being stimulated in a bright environment, and improving the user experience.

It should be noted that the mobile terminal provided by the third embodiment of the present invention is a mobile terminal applying the above method for adjusting backlight brightness, that is, all embodiments of the above method are applicable to this mobile terminal, and can achieve the same or similar beneficial effects. Effect.

Fourth embodiment

As shown in FIG. 7 , the fourth embodiment of the present invention provides a mobile terminal. The mobile terminal 700 includes: at least one processor 701 , a memory 702 , at least one network interface 704 and other user interfaces 703 . Various components in the mobile terminal 700 are coupled together through a bus system 705 . It can be understood that the bus system 705 is used to realize connection and communication between these components. In addition to the data bus, the bus system 705 also includes a power bus, a control bus and a status signal bus. However, for clarity of illustration, the various buses are labeled as bus system 705 in FIG. 7 .

Wherein, the user interface 703 may include a display, a keyboard or a pointing device (for example, a mouse, a trackball (trackball), a touch panel or a touch screen, and the like.

It can be understood that the memory 702 in the embodiment of the present invention may be a volatile memory or a nonvolatile memory, or may include both volatile and nonvolatile memories. Among them, the non-volatile memory can be read-only memory (Read-OnlyMemory, ROM), programmable read-only memory (ProgrammableROM, PROM), erasable programmable read-only memory (ErasablePROM, EPROM), electrically erasable Programming read-only memory (Electrically EPROM, EEPROM) or flash memory. The volatile memory may be random access memory (Random Access Memory, RAM), which acts as an external cache. By way of illustration and not limitation, many forms of RAM are available such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (Synchronous DRAM, SDRAM), Double Data Rate Synchronous Dynamic Random Access Memory (DoubleDataRate SDRAM, DDRSDRAM), Enhanced Synchronous Dynamic Random Access Memory (Enhanced SDRAM, ESDRAM), Synchronous Connection Dynamic Random Access Memory (SynchlinkDRAM, SLDRAM) and Direct Memory Bus Random Access Memory Access memory (DirectRambusRAM, DRRAM). Memory 702 of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

In some implementations, the memory 702 stores the following elements, executable modules or data structures, or their subsets, or their extended sets: an operating system 7021 and an application program 7022 .

Among them, the operating system 7021 includes various system programs, such as framework layer, core library layer, driver layer, etc., for realizing various basic services and processing hardware-based tasks. The application program 7022 includes various application programs, such as a media player (MediaPlayer), a browser (Browser), etc., and is used to implement various application services. The program for realizing the method of the embodiment of the present invention may be included in the application program 7022 .

In the embodiment of the present invention, by invoking the program or instruction stored in the memory 702, specifically, the program or instruction stored in the application program 7022, the processor 701 is used to obtain the current environment of the mobile terminal. When the camera is taking pictures, the target screen brightness of the display screen is to be achieved, and according to the target screen brightness, it is determined that when the backlight efficiency of the mobile terminal display screen is the highest, multiple LED lights in the lit state are required, and finally control the multiple LED lights in the mobile terminal display screen. LED lights are on.

The methods disclosed in the foregoing embodiments of the present invention may be applied to the processor 701 or implemented by the processor 701 . The processor 701 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method may be completed by an integrated logic circuit of hardware in the processor 701 or instructions in the form of software. The above-mentioned processor 701 may be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application-specific integrated circuit (Application Specific Integrated Circuit, ASIC), an off-the-shelf programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic devices, discrete gates or Transistor logic devices, discrete hardware components. Various methods, steps and logic block diagrams disclosed in the embodiments of the present invention may be implemented or executed. A general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like. The steps of the methods disclosed in the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module can be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, register. The storage medium is located in the memory 702, and the processor 701 reads the information in the memory 702, and completes the steps of the above method in combination with its hardware.

It should be understood that the embodiments described herein may be implemented by hardware, software, firmware, middleware, microcode or a combination thereof. For hardware implementation, the processing unit can be implemented in one or more application-specific integrated circuits (Application Specific Integrated Circuits, ASIC), digital signal processor (Digital Signal Processing, DSP), digital signal processing device (DSPDevice, DSPD), programmable logic device (ProgrammableLogicDevice, PLD ), Field-Programmable Gate Array (Field-Programmable GateArray, FPGA), general-purpose processor, controller, microcontroller, microprocessor, other electronic units for performing the functions described in this application, or a combination thereof.

For a software implementation, the techniques described herein can be implemented through modules (eg, procedures, functions, and so on) that perform the functions described herein. Software codes can be stored in memory and executed by a processor. Memory can be implemented within the processor or external to the processor.

Optionally, the processor 701 is also configured to acquire the current ambient brightness information of the environment where the mobile terminal is when it receives the camera-taking instruction from the front camera, and determine the current ambient brightness information of the mobile terminal through the front camera according to the current ambient brightness information and the preset screen brightness The target screen brightness to be achieved by the display screen when the camera is set to take pictures.

Optionally, the processor 701 is further configured to find the target screen brightness corresponding to the current environment brightness information from a preset correspondence table between screen brightness and environment brightness information.

Optionally, the processor 701 is further configured to acquire the current ambient brightness information of the environment where the mobile terminal is located when receiving the instruction of taking pictures from the front camera through the photosensitive sensor of the mobile terminal.

Optionally, the processor 701 is further configured to determine, according to the correspondence between the pre-stored screen brightness and the backlight efficiency of the display screen of the mobile terminal, when the backlight efficiency corresponding to the target screen brightness is maximum, how many lights need to be in the on state LED lights.

Optionally, the processor 701 is further configured to determine the current of each LED light string when the backlight efficiency corresponding to the target screen brightness is maximum according to the correspondence between the pre-stored screen brightness and the backlight efficiency of the display screen of the mobile terminal. , and according to the current of each LED light string, by controlling the I/O port of each LED light in the display screen of the mobile terminal, multiple LED lights in the display screen of the mobile terminal are controlled to be on; wherein, each LED light string Consists of multiple LED lights connected in series.

The mobile terminal 700 can implement various processes implemented by the mobile terminal in the foregoing embodiments, and to avoid repetition, details are not repeated here.

In the fourth embodiment of the present invention, the mobile terminal determines the maximum backlight efficiency of the display screen of the mobile terminal by obtaining the target screen brightness of the display screen when the mobile terminal takes pictures through the front camera in the current environment. , need multiple LED lights in the lit state, and control the multiple LED lights to be in the lit state, which solves the problem that the backlight efficiency is low when using the display screen for supplementary light photography, and it stimulates the human eye in a bright environment, affecting users The problem of experience has achieved the effect of improving the backlight efficiency when using the display screen for supplementary light photography, preventing human eyes from being irritated in a bright environment, and improving user experience.

fifth embodiment

As shown in FIG. 8 , a fifth embodiment of the present invention provides a mobile terminal. The mobile terminal 800 may be a mobile phone, a tablet computer, a personal digital assistant (Personal Digital Assistant, PDA), or a vehicle-mounted computer.

Mobile terminal 800 in FIG.

Wherein, the input unit 830 can be used for receiving number or character information input by the user, and generating signal input related to the user setting and function control of the mobile terminal 800 . Specifically, in the embodiment of the present invention, the input unit 830 may include a touch panel 831 . The touch panel 831, also referred to as a touch screen, can collect user's touch operations on or near it (such as the user's operation on the touch panel 831 using any suitable object or accessory such as a finger or a stylus), and based on preset The specified program drives the corresponding connected device. Optionally, the touch panel 831 may include two parts, a touch detection device and a touch controller. Among them, the touch detection device detects the user's touch orientation, and detects the signal brought by the touch operation, and transmits the signal to the touch controller; the touch controller receives the touch information from the touch detection device, converts it into contact coordinates, and sends it to the to the processor 860, and can receive and execute commands sent by the processor 860. In addition, the touch panel 831 can be implemented in various types such as resistive, capacitive, infrared, and surface acoustic wave. In addition to the touch panel 831, the input unit 830 may also include other input devices 832, which may include but not limited to physical keyboards, function keys (such as volume control buttons, switch buttons, etc.), trackballs, mice, joysticks, etc. one or more of.

Wherein, the display unit 840 can be used to display information input by the user or information provided to the user and various menu interfaces of the mobile terminal 800 . The display unit 840 may include a display panel 841. Optionally, the display panel 841 may be configured in the form of an LCD or an organic light-emitting diode (Organic Light-Emitting Diode, OLED).

It should be noted that the touch panel 831 can cover the display panel 841 to form a touch display screen. When the touch display screen detects a touch operation on or near it, it is sent to the processor 860 to determine the type of the touch event, and then the processor The 860 provides corresponding visual output on the touch display screen according to the type of the touch event.

The touch display screen includes an application program interface display area and a common control display area. The arrangement of the display area of the application program interface and the display area of the commonly used controls is not limited, and may be an arrangement in which the two display areas can be distinguished, such as vertical arrangement, left-right arrangement, and the like. The application program interface display area can be used to display the interface of the application program. Each interface may include at least one interface element such as an icon of an application program and/or a widget desktop control. The application program interface display area can also be an empty interface without any content. The commonly used control display area is used to display controls with a high usage rate, for example, application icons such as setting buttons, interface numbers, scroll bars, and phonebook icons.

Wherein the processor 860 is the control center of the mobile terminal 800, utilizes various interfaces and lines to connect the various parts of the whole mobile phone, by running or executing the software programs and/or modules stored in the first memory 821, and calling the software programs and/or modules stored in the second memory 821. The data in the memory 822 executes various functions of the mobile terminal 800 and processes data, so as to monitor the mobile terminal 800 as a whole. Optionally, the processor 860 may include one or more processing units.

In the embodiment of the present invention, the processor 860 is used to obtain the current environment of the mobile terminal by calling the software program and/or module stored in the first memory 821 and/or the data in the second memory 822, When taking pictures through the front camera, display the target screen brightness to be achieved by the screen, and according to the target screen brightness, determine that when the backlight efficiency of the mobile terminal display screen is the highest, multiple LED lights in a lit state are required, and finally control the mobile terminal display screen Multiple LED lights in are on.

Optionally, the processor 860 is also configured to acquire the current ambient brightness information of the environment where the mobile terminal is located when receiving the camera-taking instruction from the front camera, and determine that the mobile terminal passes through the front-facing brightness information according to the current ambient brightness information and the preset screen brightness. The target screen brightness to be achieved by the display screen when the camera is set to take pictures.

Optionally, the processor 860 is further configured to find the target screen brightness corresponding to the current environment brightness information from a preset correspondence table between screen brightness and environment brightness information.

Optionally, the processor 860 is further configured to acquire the current environment brightness information of the environment where the mobile terminal is located when receiving the instruction of taking pictures from the front camera through the photosensitive sensor of the mobile terminal.

Optionally, the processor 860 is further configured to determine, according to the correspondence between the pre-stored screen brightness and the backlight efficiency of the display screen of the mobile terminal, when the backlight efficiency corresponding to the target screen brightness is maximum, how many lights need to be in the on state LED lights.

Optionally, the processor 860 is further configured to determine the current of each LED light string when the backlight efficiency corresponding to the target screen brightness is maximum according to the correspondence between the pre-stored screen brightness and the backlight efficiency of the display screen of the mobile terminal. , and according to the current of each LED light string, by controlling the I/O port of each LED light in the display screen of the mobile terminal, multiple LED lights in the display screen of the mobile terminal are controlled to be on; wherein, each LED light string Consists of multiple LED lights connected in series.

It can be seen that in the fifth embodiment of the present invention, the mobile terminal determines the backlight efficiency of the display screen of the mobile terminal by obtaining the target screen brightness of the display screen when the mobile terminal takes pictures through the front camera in the current environment. At the maximum, multiple LED lights in the lit state are required, and the multiple LED lights are controlled to be in the lit state, which solves the problem of low backlight efficiency and irritating human eyes in a bright environment when the display screen is used for supplementary light photography. The problem that affects the user experience has achieved the effect of improving the backlight efficiency when using the display screen for supplementary light photography, preventing human eyes from being irritated in a bright environment, and improving the user experience. Those skilled in the art can appreciate that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present invention.

Those skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

In the embodiments provided in this application, it should be understood that the disclosed devices and methods may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.

If the functions described above are realized in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in various embodiments of the present invention. The aforementioned storage medium includes: various media capable of storing program codes such as U disk, mobile hard disk, ROM, RAM, magnetic disk or optical disk.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (12)

1. A method for adjusting backlight brightness, comprising: Acquiring the target screen brightness of the display screen to be achieved when the mobile terminal takes pictures through the front camera in the current environment; According to the brightness of the target screen, when it is determined that the backlight efficiency of the display screen of the mobile terminal is maximum, a plurality of LED lamps in a lit state are required; Controlling the plurality of LED lamps in the display screen of the mobile terminal to be in a lighting state. 2. The method according to claim 1, wherein the step of obtaining the target screen brightness of the display screen to be achieved when the mobile terminal is in the current environment when taking pictures through the front camera includes: Obtain the current ambient brightness information of the environment where the mobile terminal is located when it receives the camera instruction from the front camera; According to the current environment brightness information and the preset screen brightness, determine the target screen brightness to be achieved by the display screen when the mobile terminal takes pictures through the front camera. 3. The method according to claim 2, wherein, according to the current ambient brightness information and the preset screen brightness, the goal to be achieved by the display screen when the mobile terminal takes pictures through the front camera is determined Steps for screen brightness, including: Find out the target screen brightness corresponding to the current environment brightness information from the preset correspondence table between screen brightness and environment brightness information. 4. The method according to claim 2, wherein the step of obtaining the current ambient brightness information of the environment where the mobile terminal is located when receiving the camera instruction from the front camera comprises: Through the photosensitive sensor of the mobile terminal, the current ambient brightness information of the environment where the mobile terminal is located when receiving the instruction of taking pictures from the front camera is acquired. 5. The method according to claim 1, wherein, according to the brightness of the target screen, when determining that the backlight efficiency of the display screen of the mobile terminal is maximum, a plurality of LED lamps in a lighted state are required, include: According to the correspondence between the pre-stored screen brightness and the backlight efficiency of the display screen of the mobile terminal, it is determined that when the backlight efficiency corresponding to the target screen brightness is maximum, a plurality of LED lamps in a lit state are required. 6. The method according to claim 1, wherein the step of controlling the plurality of LED lights in the display screen of the mobile terminal to be in a lighted state comprises: According to the correspondence between the pre-stored screen brightness and the backlight efficiency of the display screen of the mobile terminal, determine the current of each LED light string when the backlight efficiency corresponding to the target screen brightness is maximum; According to the current of each LED lamp string, by controlling the I/O port of each LED lamp in the display screen of the mobile terminal, the plurality of LED lamps in the display screen of the mobile terminal are controlled to be in a lighted state; wherein, each An LED light string includes a plurality of LED lights connected in series. 7. A mobile terminal, characterized in that, comprising: The obtaining module is used to obtain the target screen brightness to be achieved by the display screen when the mobile terminal takes pictures through the front camera in the current environment; A determining module, configured to determine, according to the target screen brightness, that when the backlight efficiency of the display screen of the mobile terminal is maximum, a plurality of LED lamps in a lit state are required; A control module, configured to control the plurality of LED lamps in the display screen of the mobile terminal to be in a lighting state. 8. The mobile terminal according to claim 7, wherein the acquiring module comprises: The first acquiring unit is used to acquire the current ambient brightness information of the environment where the mobile terminal is located when receiving the camera instruction from the front camera; The second acquisition unit is configured to determine the target screen brightness to be achieved by the display screen when the mobile terminal takes pictures through the front camera according to the current ambient brightness information and the preset screen brightness. 9. The mobile terminal according to claim 8, wherein: The second acquiring unit is further configured to find the target screen brightness corresponding to the current environment brightness information from a preset correspondence table between screen brightness and environment brightness information. 10. The mobile terminal of claim 8, wherein: The first acquisition unit is further configured to acquire the current ambient brightness information of the environment where the mobile terminal is located when receiving the instruction of taking pictures from the front camera through the photosensitive sensor of the mobile terminal. 11. The mobile terminal according to claim 7, wherein the determining module comprises: The determination unit is configured to determine, according to the correspondence between the pre-stored screen brightness and the backlight efficiency of the display screen of the mobile terminal, when the backlight efficiency corresponding to the target screen brightness is maximum, a plurality of LED lamps in a lighted state are required . 12. The mobile terminal according to claim 7, wherein the control module comprises: The first control unit is used to determine the current of each LED light string when the backlight efficiency corresponding to the target screen brightness is maximum according to the correspondence between the pre-stored screen brightness and the backlight efficiency of the display screen of the mobile terminal; The second control unit is configured to control the plurality of LED lamps in the display screen of the mobile terminal to be at Lighting state; wherein, each LED lamp string includes a plurality of LED lamps connected in series.