WO2021143248A1 - 一种背光调节方法及电子设备 - Google Patents

一种背光调节方法及电子设备 Download PDF

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Publication number
WO2021143248A1
WO2021143248A1 PCT/CN2020/122957 CN2020122957W WO2021143248A1 WO 2021143248 A1 WO2021143248 A1 WO 2021143248A1 CN 2020122957 W CN2020122957 W CN 2020122957W WO 2021143248 A1 WO2021143248 A1 WO 2021143248A1
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Prior art keywords
brightness
electronic device
displayed
backlight
value
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PCT/CN2020/122957
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English (en)
French (fr)
Inventor
张秀峰
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华为技术有限公司
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Publication of WO2021143248A1 publication Critical patent/WO2021143248A1/zh

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3406—Control of illumination source
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3406—Control of illumination source
    • G09G3/3413—Details of control of colour illumination sources
    • 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

Definitions

  • This application relates to the field of terminal technology, and in particular to a backlight adjustment method and electronic equipment.
  • the current electronic device will adaptively adjust the backlight brightness of the display screen according to the ambient light intensity. For example, the reading mode in the e-book application is divided into day mode and night mode.
  • the e-book application of the electronic device When there is sufficient light during the day, when the e-book application of the electronic device is started, it will be automatically set to the day mode, that is, the current backlight brightness of the electronic device Corresponds to the light intensity during the day; when the light is insufficient at night, when the e-book application of the electronic device is started, it will be automatically set to night mode, that is, the current backlight brightness of the electronic device corresponds to the light intensity at night .
  • this backlight adjustment method is still not flexible enough. Under the same environment, there may still be a problem that some display contents can be clearly viewed by the user, but some display contents cannot be clearly viewed by the user due to insufficient backlight brightness.
  • the present application provides a backlight adjustment method and electronic device, which are used to flexibly adjust the backlight brightness of the electronic device, ensure that the content of the display screen can be clearly viewed by the user, and improve the user experience.
  • an embodiment of the present application provides a backlight adjustment method, which can be applied to an electronic device, and the method includes: an ambient light sensor of the electronic device collects an ambient light intensity value of the surrounding environment, and determines that it corresponds to the ambient light intensity value The first backlight brightness value.
  • the electronic device determines the brightness gain value of the screen to be displayed according to the brightness information of the screen to be displayed, and then the electronic device determines the second backlight brightness value according to the first backlight brightness value and the brightness gain value, and finally the electronic device determines the second backlight brightness value according to the second backlight brightness value, Adjust the backlight brightness of the display screen of the electronic device.
  • the electronic device when the electronic device adjusts the backlight, it takes into account the surrounding ambient light and the brightness information of the display content. Therefore, the adjustment of the backlight brightness is more flexible. This method can be used to achieve even if the environment is the same.
  • the backlight of the electronic device When the display content of the device is different, the backlight of the electronic device will also be adaptively adjusted to ensure that the content of the display screen can be clearly viewed by the user and improve the user experience.
  • the brightness gain value corresponding to the picture to be displayed satisfies the following formula:
  • Gain represents the brightness gain value corresponding to the image to be displayed
  • the constant K represents the reference value of the brightness information of the reference display image
  • APL is the brightness information corresponding to the image to be displayed
  • P is the value corresponding to the ambient light intensity Corresponding brightness gain coefficient.
  • the brightness gain value corresponding to the picture to be displayed may also be another modified formula that satisfies the formula. This application does not restrict this.
  • the second backlight brightness value satisfies the following formula:
  • L2 represents the second backlight brightness value
  • L1 represents the first backlight brightness value
  • Gain represents the brightness gain value corresponding to the picture to be displayed.
  • the electronic device determines the second backlight brightness value according to the above formula, which can solve the problem of inconsistent brightness requirements of different display contents under the same environmental illuminance. In this way, under the same environmental illuminance, the user does not need to frequently adjust the brightness bar. It should be noted that the second backlight brightness value satisfies other modified formulas of the above formula, which is not limited in this application.
  • the electronic device may also collect the brightness information of the first N-1 frames of the display screen to be displayed, and the electronic device further filters the brightness information of the display screen and the previous N-1 frames of the display screen. After processing, the processed brightness information is obtained, and the electronic device determines the brightness gain value corresponding to the picture to be displayed according to the processed brightness information.
  • the electronic device can implement smoothing processing on the brightness information of the screen to be displayed according to the above method, and prevent the brightness value of the displayed screen from fluctuating sharply before and after, so as to avoid flickering of the screen.
  • the electronic device may adjust the backlight brightness of the display screen of the electronic device to the second backlight brightness value according to a set step size.
  • the electronic device can prevent the backlight brightness of the display screen from changing too significantly during the backlight adjustment process.
  • the adjustment step size is determined according to the corresponding relationship between the current backlight brightness value of the display screen and the adjustment step size.
  • the brightness information of the picture to be displayed includes the gray-scale average pixel brightness of the picture to be displayed, the average pixel brightness of the largest component among the RGB components of the picture to be displayed, and the RGB component of the picture to be displayed The average pixel brightness of the G component.
  • embodiments of the present application provide a terminal device, including a sensor, a touch screen, a processor, and a memory, where the memory is used to store one or more computer programs; when one or more computer programs stored in the memory are used by the processor When executed, the terminal device can implement any possible design method in any of the foregoing aspects.
  • an embodiment of the present application further provides a device, which includes a module/unit that executes any one of the possible design methods in any of the foregoing aspects.
  • modules/units can be realized by hardware, or by hardware executing corresponding software.
  • an embodiment of the present application also provides a computer-readable storage medium.
  • the computer-readable storage medium includes a computer program.
  • the computer program runs on an electronic device, the electronic device executes any of the above aspects. Any one of the possible design methods.
  • the embodiments of the present application also provide a method that includes a computer program product, which when the computer program product runs on a terminal, causes the electronic device to execute any one of the possible designs in any of the above-mentioned aspects.
  • an embodiment of the present application further provides a chip, which is coupled with a memory and is used to execute a computer program stored in the memory to execute any possible design method of any one of the above aspects.
  • FIG. 1 is a schematic diagram of a set of display screens of an electronic device provided by an embodiment of the application
  • Figure 2 is a schematic structural diagram of a mobile phone provided by an embodiment of the application.
  • FIG. 3 is a schematic structural diagram of an Android operating system provided by an embodiment of the application.
  • FIG. 4 is a schematic structural diagram of an electronic device provided by an embodiment of this application.
  • FIG. 5 is a schematic flowchart of a backlight adjustment method provided by an embodiment of the application.
  • Fig. 6(a) is a schematic diagram of a P curve provided by an embodiment of this application.
  • FIG. 6(b) is a corresponding relationship between a backlight brightness value and an ambient light intensity value provided by an embodiment of this application;
  • FIG. 6(c) is a schematic diagram of a sensitivity curve provided by an embodiment of this application.
  • FIG. 7 is a schematic diagram of display content of a group of electronic devices provided by an embodiment of the application.
  • FIG. 8 is a schematic structural diagram of a backlight adjusting device provided by an embodiment of the application.
  • FIG. 9 is a schematic structural diagram of a terminal provided by an embodiment of the application.
  • the APP involved in the embodiments of this application is a software program that can realize one or more specific functions.
  • multiple applications can be installed in a terminal device.
  • the applications mentioned in the following may be system applications that have been installed on the terminal device when it leaves the factory, or third-party applications that the user downloads from the network or obtains from other terminal devices while using the terminal device.
  • the sensitivity curve involved in the embodiment of the present application may be pre-stored in the electronic device.
  • the sensitivity curve represents the corresponding relationship between the backlight brightness value and the adjustment step length, and the adjustment step length represents the maximum backlight brightness change of the display screen when the corresponding backlight brightness value is not perceivable by the human eye value.
  • the sensitivity curve can be obtained by fitting test results of sensitivity tests performed by multiple users in different environments. Illustratively, as shown in FIG. 6(c), the horizontal axis is the backlight brightness range, and the vertical axis is the adjustment step size.
  • the electronic device Since the brightness of the white background is very high, the electronic device will lower the brightness of the display backlight, but if the user adjusts the desktop background For a black (or dark) background, as shown in Figure 1 (b), the display interface becomes white on a black background, and the brightness of the black background is very low, so the electronic device still uses the display screen in this environment When the backlight brightness value is displayed on the screen, the problem of insufficient brightness will occur. It can be seen that even under the same ambient lighting conditions, because the content displayed on the display screen is different, users have different requirements for brightness, and the traditional backlight dimming method cannot meet this requirement at all.
  • the embodiments of the present application provide a backlight adjustment method, which can adjust the backlight brightness based on the ambient light intensity value and further adjust the backlight brightness according to the brightness information of the display screen, so as to achieve flexible electronic adjustment.
  • the purpose of the brightness of the device backlight is to ensure that the content of the display can be clearly viewed by the user, and to improve the user experience.
  • the electronic device may be a portable terminal containing functions such as a personal digital assistant and/or a music player, such as a mobile phone, a tablet computer, a wearable device with wireless communication function (such as a smart watch), a vehicle-mounted device, etc. .
  • portable terminals include, but are not limited to, carrying Or portable terminals with other operating systems.
  • the aforementioned portable terminal may also be, for example, a laptop computer (Laptop) having a touch-sensitive surface (such as a touch panel). It should also be understood that, in some other embodiments, the aforementioned terminal may also be a desktop computer with a touch-sensitive surface (such as a touch panel).
  • FIG. 2 shows a schematic structural diagram of the mobile phone 200.
  • the mobile phone 200 may include a processor 210, an external memory interface 220, an internal memory 221, a USB interface 230, a charging management module 240, a power management module 241, a battery 242, antenna 1, antenna 2, mobile communication module 251, wireless communication module 252, Audio module 270, speaker 270A, receiver 270B, microphone 270C, earphone interface 270D, sensor module 280, buttons 290, motor 291, indicator 292, camera 293, display screen 294, SIM card interface 295 and so on.
  • a processor 210 an external memory interface 220, an internal memory 221, a USB interface 230, a charging management module 240, a power management module 241, a battery 242, antenna 1, antenna 2, mobile communication module 251, wireless communication module 252, Audio module 270, speaker 270A, receiver 270B, microphone 270C, earphone interface 270D, sensor module 280, buttons 290, motor 291, indicator 292, camera 293, display screen 294, SIM card interface 295 and so on.
  • the sensor module 280 may include an ambient light sensor 280A (of course, the mobile phone 100 may also include other sensors, such as a gyroscope sensor, an acceleration sensor, a proximity light sensor, a fingerprint sensor, a touch sensor, a temperature sensor, a pressure sensor, a distance sensor, and a magnetic sensor. Sensors, ambient light sensors, air pressure sensors, bone conduction sensors, etc., not shown in the figure).
  • the structure illustrated in the embodiment of the present invention does not constitute a specific limitation on the mobile phone 200.
  • the mobile phone 200 may include more or fewer components than shown, or combine certain components, or split certain components, or arrange different components.
  • the illustrated components can be implemented in hardware, software, or a combination of software and hardware.
  • the processor 210 may include one or more processing units.
  • the processor 210 may include an application processor (AP), a modem processor, a graphics processing unit (GPU), and an image signal processor. (image signal processor, ISP), controller, memory, video codec, digital signal processor (digital signal processor, DSP), baseband processor, and/or neural network processor (Neural-network Processing Unit, NPU) Wait.
  • the different processing units may be independent devices or integrated in one or more processors.
  • the controller may be the nerve center and command center of the mobile phone 200. The controller can generate operation control signals according to the instruction operation code and timing signals to complete the control of fetching instructions and executing instructions.
  • a memory may also be provided in the processor 210 for storing instructions and data.
  • the memory in the processor 210 is a cache memory.
  • the memory can store instructions or data that have just been used or recycled by the processor 210. If the processor 210 needs to use the instruction or data again, it can be directly called from the memory. Repeated accesses are avoided, the waiting time of the processor 210 is reduced, and the efficiency of the system is improved.
  • the processor 210 may run the backlight adjustment method provided by the embodiments of the present application to flexibly adjust the backlight brightness of the electronic device, ensure that the content of the display screen can be clearly displayed, and improve the user experience.
  • the processor 210 may include different devices. For example, when a CPU and a GPU are integrated, the CPU and GPU can cooperate to execute the backlight adjustment method provided in the embodiments of the present application. For example, some of the algorithms in the backlight adjustment method are executed by the CPU, and the other part of the algorithm is executed by the GPU. In order to get faster processing efficiency.
  • the display screen 294 is used to display images, videos, and the like.
  • the display screen 294 includes a display panel.
  • the display panel can use liquid crystal display (LCD), organic light-emitting diode (OLED), active matrix organic light-emitting diode or active-matrix organic light-emitting diode (active-matrix organic light-emitting diode).
  • LCD liquid crystal display
  • OLED organic light-emitting diode
  • active-matrix organic light-emitting diode active-matrix organic light-emitting diode
  • AMOLED flexible light-emitting diode (FLED), Miniled, MicroLed, Micro-oLed, quantum dot light-emitting diode (QLED), etc.
  • the mobile phone 200 may include one or N display screens 294, and N is a positive integer greater than one.
  • the display screen 294 is connected to a backlight driver IC 294A, and the backlight driver IC 294A is used to control the backlight brightness of the display screen 294.
  • the processor 210 or the co-processor therein implements a backlight adjustment of the display screen 294
  • the processor 210 converts the adjusted target backlight brightness value this time into data in a specific format and sends it to
  • the backlight driver IC 294A after identifying the target backlight brightness value, controls the backlight brightness change of the display screen 294 to adjust the backlight brightness of the display screen to the target backlight brightness value.
  • the data in the specific format may be Pulse Width Modulation (PWM).
  • the display screen 294 may be an integrated flexible display screen, or a spliced display screen composed of two rigid screens and a flexible screen located between the two rigid screens.
  • the processor 210 may control the brightness of the backlight on the display screen 294.
  • the camera 293 (a front camera or a rear camera, or a camera can be used as a front camera or a rear camera) is used to capture still images or videos.
  • the camera 293 may include photosensitive elements such as a lens group and an image sensor, where the lens group includes a plurality of lenses (convex lens or concave lens) for collecting the light signal reflected by the object to be photographed and transmitting the collected light signal to the image sensor .
  • the image sensor generates an original image of the object to be photographed according to the light signal.
  • the internal memory 221 may be used to store computer executable program code, where the executable program code includes instructions.
  • the processor 210 executes various functional applications and data processing of the mobile phone 200 by running instructions stored in the internal memory 221.
  • the internal memory 221 may include a storage program area and a storage data area.
  • the storage program area can store operating system, application program (such as camera application, WeChat application, etc.) codes and so on.
  • the data storage area can store data created during the use of the mobile phone 200 (such as data collected by a sensor) and the like.
  • the internal memory 221 may also store the code of the backlight adjustment algorithm provided in the embodiment of the present application.
  • the processor 210 may control the brightness of the backlight on the display screen 294.
  • the internal memory 221 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, a universal flash storage (UFS), and the like.
  • a non-volatile memory such as at least one magnetic disk storage device, a flash memory device, a universal flash storage (UFS), and the like.
  • the code of the backlight adjustment algorithm provided in the embodiments of the present application can also be stored in an external memory.
  • the processor 210 can run the code of the backlight adjustment algorithm stored in the external memory through the external memory interface 220, and the processor 210 can control the brightness of the backlight on the display screen 294.
  • the function of the sensor module 280 is described below.
  • the ambient light sensor 280A can adjust the backlight brightness value of the display screen 294 according to the collected ambient light intensity, so that the processor 210 can adjust the backlight brightness value of the display screen 294 according to the collected intensity.
  • the proximity sensor can turn off the display screen 294 and/or the backlight when the mobile phone 200 is moved to the ear.
  • the accelerometer sensor can detect the magnitude of acceleration in various directions (usually three-axis), and can detect the magnitude and direction of gravity when it is stationary.
  • mobile phone posture applications such as horizontal and vertical screen switching, related Games, magnetometer posture calibration), vibration recognition related functions (such as pedometer, percussion), etc.
  • the mobile phone 200 can also be configured with other sensors such as gyroscope, barometer, hygrometer, thermometer, infrared sensor, etc. This will not be repeated here.
  • the wireless communication function of the mobile phone 200 can be realized by the antenna 1, the antenna 2, the mobile communication module 251, the wireless communication module 252, the modem processor, and the baseband processor.
  • the antenna 1 and the antenna 2 are used to transmit and receive electromagnetic wave signals.
  • Each antenna in the mobile phone 200 can be used to cover a single or multiple communication frequency bands. Different antennas can also be reused to improve antenna utilization.
  • Antenna 1 can be multiplexed as a diversity antenna of a wireless local area network.
  • the antenna can be used in combination with a tuning switch.
  • the mobile communication module 251 can provide a wireless communication solution including 2G/3G/4G/5G and the like applied on the mobile phone 200.
  • the mobile communication module 251 may include at least one filter, a switch, a power amplifier, a low noise amplifier (LNA), and the like.
  • the mobile communication module 251 can receive electromagnetic waves from the antenna 1, filter, amplify, and other processing of the received electromagnetic waves, and transmit them to the modem processor for demodulation.
  • the mobile communication module 251 can also amplify the signal modulated by the modem processor, and convert it to electromagnetic wave radiation via the antenna 1.
  • at least part of the functional modules of the mobile communication module 251 may be provided in the processor 210.
  • at least part of the functional modules of the mobile communication module 251 and at least part of the modules of the processor 210 may be provided in the same device.
  • the modem processor may include a modulator and a demodulator.
  • the modulator is used to modulate the low frequency baseband signal to be sent into a medium and high frequency signal.
  • the demodulator is used to demodulate the received electromagnetic wave signal into a low-frequency baseband signal.
  • the demodulator then transmits the demodulated low-frequency baseband signal to the baseband processor for processing.
  • the application processor outputs a sound signal through an audio device (not limited to a speaker 270A, a receiver 270B, etc.), or displays an image or video through the display screen 294.
  • the modem processor may be an independent device.
  • the modem processor may be independent of the processor 210 and be provided in the same device as the mobile communication module 251 or other functional modules.
  • the wireless communication module 252 can provide applications on the mobile phone 200 including wireless local area networks (WLAN) (such as wireless fidelity (Wi-Fi) networks), bluetooth (BT), and global navigation satellite systems. (global navigation satellite system, GNSS), frequency modulation (FM), near field communication (NFC), infrared technology (infrared, IR) and other wireless communication solutions.
  • WLAN wireless local area networks
  • BT Bluetooth
  • GNSS global navigation satellite system
  • FM frequency modulation
  • NFC near field communication
  • IR infrared technology
  • the wireless communication module 252 may be one or more devices integrating at least one communication processing module.
  • the wireless communication module 252 receives electromagnetic waves via the antenna 2, frequency modulates and filters the electromagnetic wave signals, and sends the processed signals to the processor 210.
  • the wireless communication module 252 may also receive the signal to be sent from the processor 210, perform frequency modulation, amplify it, and convert it into electromagnetic waves and radiate it through the antenna 2.
  • the mobile phone 200 can implement audio functions through the audio module 270, the speaker 270A, the receiver 270B, the microphone 270C, the earphone interface 270D, and the application processor. For example, music playback, recording, etc.
  • the mobile phone 200 can receive the key 290 input, and generate key signal input related to the user settings and function control of the mobile phone 200.
  • the mobile phone 200 can use the motor 291 to generate a vibration notification (for example, an incoming call vibration notification).
  • the indicator 292 in the mobile phone 200 can be an indicator light, which can be used to indicate the charging status, power change, and can also be used to indicate messages, missed calls, notifications, and so on.
  • the SIM card interface 295 in the mobile phone 200 is used to connect to the SIM card.
  • the SIM card can be connected to and separated from the mobile phone 200 by inserting into the SIM card interface 295 or pulling out from the SIM card interface 295.
  • the mobile phone 200 may include more or less components than those shown in FIG. 1, which is not limited in the embodiment of the present application.
  • the illustrated mobile phone 200 is only an example, and the mobile phone 200 may have more or fewer components than shown in the figure, may combine two or more components, or may have different component configurations.
  • the various components shown in the figure may be implemented in hardware, software, or a combination of hardware and software including one or more signal processing and/or application specific integrated circuits.
  • the software system of the electronic device can adopt a layered architecture, an event-driven architecture, a microkernel architecture, a microservice architecture, or a cloud architecture.
  • the embodiment of the present invention takes an Android system with a layered architecture as an example to illustrate the software structure of an electronic device.
  • Fig. 3 is a software structure block diagram of an electronic device according to an embodiment of the present invention.
  • the layered architecture divides the software into several layers, and each layer has a clear role and division of labor. Communication between layers through software interface.
  • the Android system is divided into four layers, from top to bottom, the application layer, the application framework layer, the Android runtime and system library, and the kernel layer.
  • the application layer can include a series of application packages.
  • the application package can include applications such as phone, camera, gallery, calendar, call, map, navigation, WLAN, Bluetooth, music, video, short message, etc.
  • the application framework layer provides an application programming interface (application programming interface, API) and a programming framework for applications in the application layer.
  • the application framework layer includes some predefined functions.
  • the application framework layer can include a window manager, a content provider, a view system, a phone manager, a resource manager, a notification manager, and so on.
  • the window manager is used to manage window programs.
  • the window manager can obtain the size of the display screen, determine whether there is a status bar, lock the screen, take a screenshot, etc.
  • the content provider is used to store and retrieve data and make these data accessible to applications.
  • the data may include videos, images, audios, phone calls made and received, browsing history and bookmarks, phone book, etc.
  • the view system includes visual controls, such as controls that display text, controls that display pictures, and so on.
  • the view system can be used to build applications.
  • the display interface can be composed of one or more views.
  • a display interface that includes a short message notification icon may include a view that displays text and a view that displays pictures.
  • the phone manager is used to provide the communication function of the electronic device. For example, the management of the call status (including connecting, hanging up, etc.).
  • the resource manager provides various resources for the application, such as localized strings, icons, pictures, layout files, video files, and so on.
  • the notification manager enables the application to display notification information in the status bar, which can be used to convey notification-type messages, and it can automatically disappear after a short stay without user interaction.
  • the notification manager is used to notify download completion, message reminders, and so on.
  • the notification manager can also be a notification that appears in the status bar at the top of the system in the form of a chart or a scroll bar text, such as a notification of an application running in the background, or a notification that appears on the screen in the form of a dialog window. For example, text messages are prompted in the status bar, prompt sounds, electronic devices vibrate, and indicator lights flash.
  • Android Runtime includes core libraries and virtual machines. Android runtime is responsible for the scheduling and management of the Android system.
  • the core library consists of two parts: one part is the function functions that the java language needs to call, and the other part is the core library of Android.
  • the application layer and application framework layer run in a virtual machine.
  • the virtual machine executes the java files of the application layer and the application framework layer as binary files.
  • the virtual machine is used to perform functions such as object life cycle management, stack management, thread management, security and exception management, and garbage collection.
  • the system library can include multiple functional modules. For example: surface manager (surface manager), media library (Media Libraries), three-dimensional graphics processing library (for example: OpenGL ES), 2D graphics engine (for example: SGL), etc.
  • the surface manager is used to manage the display subsystem and provides a combination of 2D and 3D layers for multiple applications.
  • the media library supports playback and recording of a variety of commonly used audio and video formats, as well as still image files.
  • the media library can support a variety of audio and video encoding formats, such as: MPEG4, H.264, MP3, AAC, AMR, JPG, PNG, etc.
  • the 3D graphics processing library is used to implement 3D graphics drawing, image rendering, synthesis, and layer processing.
  • the 2D graphics engine is a drawing engine for 2D drawing.
  • the kernel layer is the layer between hardware and software.
  • the kernel layer contains at least display driver, camera driver, audio driver, and sensor driver.
  • the ambient light sensor in the hardware layer can collect data, and the processor 210 obtains N samples from each ambient light sensor 280A of the electronic device. The ambient light intensity value collected at the moment.
  • the processor 210 obtains the brightness information of the picture to be displayed from the display 294 of the electronic device, and obtains the average picture level (APL) of the picture to be displayed by statistics.
  • the processor 210 determines the first backlight brightness value corresponding to the ambient light intensity according to the ambient light intensity value, and then adjusts the first backlight brightness value based on the gain coefficient corresponding to the APL to obtain the second backlight brightness value.
  • the processor 210 converts the second backlight brightness value into a pulse width modulation (PWM) signal and sends it to the backlight driver IC 294A.
  • PWM pulse width modulation
  • the backlight driver IC 294A adjusts the backlight brightness of the display screen 294 to the second backlight brightness value.
  • FIG. 4 is a schematic structural diagram of an electronic device to which the backlight adjustment method provided by an embodiment of the application is applicable.
  • Figure 4 (a) shows a curved screen, the edge of the curved screen has a certain curvature
  • Figure 4 (b) shows a full screen, the sides of the full screen are not curved
  • (C) and (d) in Figure 4 show a folding screen.
  • (c) in Figure 4 is the folding screen in a half-folded state
  • (d) in Figure 4 is the folding screen in a fully folded state.
  • the bendable area is the edge display area of the folding screen.
  • an ambient light sensor 280A may be provided on the housing or the display screen in FIG. 4.
  • the method is applied to various electronic devices with display screens, where the electronic devices include a processor, an ambient light sensor, and a backlight driver IC.
  • the electronic device may be a mobile phone 200 as shown in FIG. 2. Referring to FIG. 5, the method specifically includes the following steps.
  • Step 501 The processor 210 of the electronic device obtains the ambient light intensity value collected by the ambient light sensor.
  • condition that triggers the electronic device to perform the above step 401 may be: the display screen of the electronic device is displaying content, or the electronic device receives a user's touch instruction, or the electronic device determines that the ambient light of its environment has changed. Time waiting.
  • the ambient light sensor of the electronic device may collect the illumination intensity of the ambient light in the current use scene of the electronic device according to a fixed sampling frequency to obtain multiple ambient light intensity values.
  • the electronic device may weight and average the multiple ambient light intensity values to obtain the processed ambient light intensity value.
  • the electronic device can filter multiple ambient light intensity values first (for example, filter processing using a Finite Impulse Response (Finite Impulse Response, FIR) filter) and then weighted and averaged to obtain the processed ambient light intensity value .
  • FIR Finite Impulse Response
  • Step 502 The processor 210 of the electronic device determines a first backlight brightness value corresponding to the ambient light intensity value.
  • the processor of the electronic device determines the first backlight brightness value corresponding to the ambient light intensity value according to the corresponding relationship between the ambient light intensity value and the backlight brightness value.
  • the ambient light intensity value may be the ambient light intensity value after the above processing.
  • the electronic device before performing step 502, the electronic device needs to collect the environmental light intensity value through the environmental sensor in advance, and determine the backlight brightness value corresponding to different environmental light intensity values according to the change trend of the environmental light intensity value. That is, the electronic device needs to generate the corresponding relationship between the light intensity value and the backlight brightness value in advance.
  • the user can customize the brightness reference value, which can be the backlight brightness value that the user feels most comfortable, or the developer can preset the brightness reference value in the electronic device. Based on the brightness reference value, the electronic device establishes a corresponding relationship between the ambient light intensity value and the backlight brightness value.
  • the unit of the ambient light intensity value is Lux
  • the unit of the backlight brightness value is nit.
  • step 503 the processor 210 of the electronic device obtains the brightness information of the screen to be displayed, and determines the brightness gain value corresponding to the screen to be displayed according to the brightness information of the screen to be displayed.
  • the brightness information may be the average pixel level (AVL) of the screen.
  • APL reflects the average gray level of the displayed content, that is, the brightness of the content.
  • APL may be the gray-scale average pixel brightness of the picture to be displayed, or APL is the average pixel brightness of the largest component in the RGB components of the picture to be displayed, or APL is the average pixel brightness of the G component in the RGB components of the picture to be displayed.
  • the processor of the electronic device may calculate the brightness gain value corresponding to the picture to be displayed according to the following formula 1:
  • Gain represents the brightness gain value corresponding to the image to be displayed
  • the constant K represents the reference value of the brightness information of the reference display image
  • APL is the brightness information corresponding to the image to be displayed
  • P is the brightness gain coefficient corresponding to the ambient light intensity value.
  • P is a variable, and the size of P is related to the value of the ambient light intensity.
  • the graph corresponding to P is shown in Figure 6(a).
  • the P curve can be obtained through multiple experiments by the developer, and the P curve can be found in 1D in one dimension. -lut (one-dimensional color lookup table) implementation.
  • the curve corresponding to the brightness gain value is shown in Figure 6(b).
  • the constant K may be 1.
  • the APL is also 1, so Gain is equal to 1.
  • Gain is usually greater than 1.
  • the brightness gain value corresponding to the picture to be displayed may also be a formula obtained by satisfying other variants of the above formula 1, which is not specifically limited in this application.
  • Step 504 The processor 210 of the electronic device determines a second backlight brightness value according to the first backlight brightness value and the brightness gain value.
  • L2 represents the second backlight brightness value
  • L1 represents the first backlight brightness value
  • Gain represents the brightness gain value corresponding to the picture to be displayed.
  • the second backlight brightness value corresponding to the picture to be displayed may also be a formula obtained by satisfying other variants of the above formula 2, which is not specifically limited in this application.
  • Step 505 The processor 210 of the electronic device adjusts the backlight brightness of the display screen of the electronic device according to the second backlight brightness value.
  • the electronic device can determine the adjustment step size according to the corresponding relationship between the current backlight brightness value of the display screen and the adjustment step size, where the sensitivity curve includes the correspondence between the backlight brightness value and the adjustment step size
  • the brightness is adjusted according to the adjustment step, so that the backlight brightness of the display screen can be adjusted without the user's perception.
  • the adjustment step size may be dynamically changed, for example, when the backlight brightness value of the display screen is larger, the adjustment step size is smaller.
  • the processor determines that the adjustment step length of each backlight adjustment is less than or equal to the sensitivity curve. At this time, when the processor is performing backlight adjustment, the user's eyes are completely unaware of the change in the brightness of the backlight of the display screen.
  • the adjustment step length of each backlight adjustment determined by the processor is slightly larger than the adjustment step length found in the sensitivity curve, so that all The processor adjusts to the target backlight brightness value as soon as possible, and at the same time, it also enables the user's eyes to adapt to changes in ambient light as soon as possible. At this time, the user's eyes can slightly perceive the backlight of the display during the backlight adjustment process of the processor. Brightness changes.
  • the electronic device may also collect the brightness information of the first N-1 frames of the to-be-displayed picture, and compare the brightness information of the to-be-displayed picture and the first N-1 frames of the display picture. Filtering processing is performed on the brightness information to obtain the processed brightness information, and the brightness gain value corresponding to the to-be-displayed picture is determined according to the processed brightness information.
  • the processor of the electronic device uses the FIR filter to perform filtering processing, and filters out noises such as glitches and jitters in multiple APLs by adjusting performance parameters such as the order, cutoff frequency, and attenuation degree of the FIR filter.
  • the multiple APLs filtered by the high fidelity and other characteristics of the FIR filter can avoid flickering of the picture transmission, thereby also improving the user experience.
  • the statistical interval of APL is not limited, and N-1 frames of display pictures can be counted continuously, or counted once every several frames.
  • the processor of the electronic device adjusts the backlight to the second backlight brightness value
  • another possible implementation is when the second backlight brightness value is greater than the maximum brightness value of the backlight brightness
  • the following takes the electronic device as a mobile phone as an example.
  • the mobile phone pre-stores the corresponding relationship between the ambient light intensity value and the backlight brightness value, formula one, formula two and the reference value K, P curve of the brightness information of the reference display screen .
  • the current ambient light intensity value detected by the mobile phone's ambient light sensor such as 300 lux.
  • the mobile phone determines the first backlight brightness value corresponding to the ambient light intensity value, for example, 100 nit.
  • the mobile phone obtains the APL of the display screen of the game application.
  • the mobile phone uses formula 1 and formula 2 as well as the brightness information reference value K, P curve and APL of the reference display screen to calculate The brightness gain value, for example, Gain is equal to 1.3. In the end, the mobile phone calculates that 100nit multiplied by 1.3 equals 130nit.
  • the processor of the mobile phone continues to know from the human eye sensitivity curve. Assuming that the current backlight brightness is 90nit, the adjustment step corresponding to the current backlight brightness 90nit is 1.8nit. Therefore, the processor will adjust the current backlight brightness value and the adjustment step.
  • the screen of the mobile phone displays the interface shown in Figure 7 (a), and the current display content is black on a white background.
  • the mobile phone obtains the APL of the currently displayed content and the APL of the previous N-1 frames, and processes these N frames to obtain the processed APL .
  • the mobile phone determines that the current environment has not changed, that is, the ambient light intensity value has not changed, the mobile phone determines the brightness gain value according to the processed APL, and determines the second backlight brightness value according to the product of the brightness gain value and the current backlight brightness value
  • the processor of the mobile phone sends a PWM signal corresponding to the second backlight brightness value to the backlight driving IC, and controls and adjusts the backlight of the display screen to the second backlight brightness value.
  • the electronic device when the electronic device adjusts the backlight, it takes into account the surrounding ambient light and the brightness information of the display content. Therefore, the adjustment of the backlight brightness is more flexible. This method can be used to achieve even if the environment is the same, when the display of the electronic device When the content is different, the backlight of the electronic device will also be adaptively adjusted to ensure that the content of the display screen can be clearly viewed by the user and improve the user experience.
  • the embodiments of the present application provide a backlight adjustment device, which is applied to an electronic device with a display screen, and is used to implement the backlight adjustment method as shown in FIG.
  • the device also includes an ambient light sensor and a backlight driver IC.
  • the device 800 includes: an acquisition unit 801 and a processing unit 802, wherein,
  • the acquiring unit 801 is configured to acquire the ambient light intensity value of the environment around the electronic device and the brightness information of the to-be-displayed picture of the electronic device;
  • the processing unit 802 is configured to determine the first backlight brightness value corresponding to the ambient light intensity value according to the ambient light intensity value; determine the brightness gain value corresponding to the picture to be displayed according to the brightness information of the picture to be displayed; according to the first backlight brightness Value and the brightness gain value, determine the second backlight brightness value; according to the second backlight brightness value, adjust the backlight brightness of the display screen of the electronic device.
  • the brightness gain value corresponding to the picture to be displayed satisfies the following formula 1
  • the second backlight brightness value satisfies the following formula 2.
  • the electronic device also collects the brightness information of the first N-1 frame of the to-be-displayed screen, and compares the brightness information of the to-be-displayed screen and the brightness information of the first N-1 frame of the display screen.
  • the filtering process is performed to obtain the processed brightness information, and the electronic device can determine the brightness gain value corresponding to the picture to be displayed according to the processed brightness information.
  • the electronic device adjusts the backlight brightness of the display screen of the electronic device to the second backlight brightness value according to the adjustment step.
  • the electronic device when the second backlight brightness value is greater than the maximum brightness value of the backlight brightness, the electronic device adjusts the backlight brightness of the display screen of the electronic device to the maximum brightness value.
  • the backlight adjustment device provided by the embodiment of the present invention is adopted. After the device obtains a plurality of ambient light intensity values and brightness information of the picture to be displayed, when the backlight is adjusted, the two factors of the ambient light and the brightness information of the display content are comprehensively considered Therefore, the adjustment of the backlight brightness is more flexible.
  • This method can be used to realize that even if the environment is the same, when the display content of the electronic device is different, the backlight of the electronic device will be adaptively adjusted to ensure that the content of the display screen can be clearly viewed by the user. The user experience is improved, the backlight adjustment of the electronic device is relatively timely and accurate, which saves the power consumption of the electronic device.
  • the division of units in the embodiments of the present application is illustrative, and is only a logical function division, and there may be other division methods in actual implementation.
  • the functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the above-mentioned integrated unit can be implemented in the form of hardware or software functional unit.
  • the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium.
  • the technical solution of the present application essentially or the part that contributes to the existing technology or all or 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 a number of instructions to enable a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disks or optical disks and other media that can store program codes. .
  • an embodiment of the present invention also provides an electronic device for implementing the backlight adjustment method shown in FIG. 9 and has the function of the backlight adjustment device 800 shown in FIG. 8, as shown in FIG. 9.
  • the electronic device 900 includes: a transceiver 901, a processor 902, a bus 903, a memory 904, an ambient light sensor 905, a backlight driver IC 906, and a display screen 907, among which,
  • the transceiver 901 and the processor 902, the memory 904, the ambient light sensor 905, and the backlight driving IC 906 are connected to each other through the bus 903, and the backlight driving IC 906 and the display screen 907 are also connected to each other through the bus 903.
  • the bus 903 may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus, etc.
  • PCI peripheral component interconnect
  • EISA extended industry standard architecture
  • the bus can be divided into an address bus, a data bus, a control bus, and so on. For ease of representation, only one thick line is used in FIG. 9, but it does not mean that there is only one bus or one type of bus.
  • the transceiver 901 is used to communicate and interact with other devices.
  • the ambient light sensor 905 is configured to collect multiple light intensity sampling values of the ambient light in the environment where the electronic device 900 is located, and send them to the processor 902;
  • the backlight driver IC 906 is configured to receive the backlight brightness value sent by the processor 902, and control the backlight brightness of the display screen 907 to be adjusted to the backlight brightness value.
  • the processor 902 is configured to implement the backlight adjustment method as shown in FIG. 5,
  • the electronic device provided by the embodiment of the present application, after the electronic device obtains a plurality of ambient light intensity values and brightness information of the picture to be displayed, when the backlight is adjusted, the two factors of the surrounding ambient light and the brightness of the displayed content are comprehensively considered. Therefore, the adjustment of the backlight brightness is more flexible.
  • This method can be used to realize that even if the environment is the same, when the display content of the electronic device is different, the backlight of the electronic device will be adaptively adjusted, thereby ensuring that the content of the display screen can be clearly viewed by the user.
  • the user experience shows that the backlight adjustment of the electronic device is relatively timely and accurate, which saves the power consumption of the electronic device.
  • the embodiments of the present application also provide a computer storage medium that stores computer instructions, and when the computer instructions run on an electronic device, the electronic device executes the above-mentioned related method steps to implement the method in the above-mentioned embodiment.
  • the embodiments of the present application also provide a computer program product, which when the computer program product runs on a computer, causes the computer to execute the above-mentioned related steps, so as to implement the method in the above-mentioned embodiment.
  • the embodiments of the present application also provide a device.
  • the device may specifically be a chip, component or module.
  • the device may include a processor and a memory connected to each other.
  • the memory is used to store computer execution instructions.
  • the processor can execute the computer-executable instructions stored in the memory, so that the chip executes the methods in the foregoing method embodiments.
  • the disclosed device and method can be implemented in other ways.
  • the device embodiments described above are merely illustrative, for example, the division of modules or units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components may be combined It can be integrated into another device, or some features can be discarded or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate parts may or may not be physically separate, and the parts displayed as units may be one physical unit or multiple physical units, that is, they may be located in one place, or they may be distributed to multiple different places. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
  • the functional units in the various embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the above-mentioned integrated unit can be implemented in the form of hardware or software functional unit.
  • the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium.
  • the technical solutions of the embodiments of the present application are essentially or the part that contributes to the prior art, or all or part of the technical solutions can be embodied in the form of a software product, and the software product is stored in a storage medium. It includes several instructions to make a device (which may be a single-chip microcomputer, a chip, etc.) or a processor (processor) execute all or part of the steps of the methods of the various embodiments of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, read only memory (read only memory, ROM), random access memory (random access memory, RAM), magnetic disk or optical disk and other media that can store program codes.

Abstract

一种背光调节方法及电子设备。背光调节方法包括：电子设备的处理器获取环境光传感器所采集的环境光强度值（501）；电子设备的处理器确定与环境光强度值对应的第一背光亮度值（502）；电子设备的处理器获取待显示画面的亮度信息，根据待显示画面的亮度信息，确定与待显示画面对应的亮度增益值（503）；电子设备的处理器根据第一背光亮度值和亮度增益值，确定第二背光亮度值（504）；电子设备的处理器根据第二背光亮度值，调节电子设备的显示屏的背光亮度。背光调节方法可以灵活调整电子设备的背光亮度，确保显示屏的内容可以被清晰显示。

Description

一种背光调节方法及电子设备
相关申请的交叉引用
本申请要求在2020年01月14日提交中国专利局、申请号为202010037138.4、申请名称为“一种背光调节方法及电子设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及终端技术领域，尤其涉及一种背光调节方法及电子设备。
背景技术
目前大部分电子设备均带有背光显示的显示屏，例如液晶显示器(liquid crystal display，LCD)。电子设备的显示效果会受到周围环境光的光照强度影响，为了确保显示屏上的显示内容可以清晰的显示，目前电子设备会根据周围环境光强度，自适应调整显示屏的背光亮度。例如，电子书应用中的阅读模式分为日间模式和夜间模式，在白天光照充足时，电子设备的电子书应用被启动时，会被自动设置为日间模式，即当前电子设备的背光亮度与白天的光照强度是相对应的；在夜间光照不足时，电子设备的电子书应用被启动时，会被自动设置为夜间模式，即当前电子设备的背光亮度与夜间的光照强度是相对应的。但是这一背光调节方法仍不够灵活，相同环境下，仍可能会出现有些显示内容可以被用户清晰查看，但有些显示内容因背光亮度不足导致不能用户清晰查看的问题。
发明内容
本申请提供一种背光调节方法及电子设备，用于灵活调整电子设备背光亮度，确保显示屏的内容可以被用户清晰查看，提升用户使用体验。
第一方面，本申请实施例提供一种背光调节方法，该方法可以应用于电子设备，该方法包括：电子设备的环境光传感器采集周围环境的环境光强度值，并确定与环境光强度值对应的第一背光亮度值。电子设备根据待显示画面的亮度信息，确定待显示画面的亮度增益值，继而电子设备根据第一背光亮度值和亮度增益值，确定第二背光亮度值，最终电子设备根据第二背光亮度值，调节电子设备的显示屏的背光亮度。
本申请实施例中，电子设备在对背光进行调节时，综合考虑了周围环境光与显示内容的亮度信息两个因素，因此背光亮度的调整更加灵活，利用该方法可以实现即使环境相同，当电子设备的显示内容不同时，电子设备的背光也会进行自适应调节，从而确保显示屏的内容可以被用户清晰查看，提升用户使用体验。
一种可能的实施方式中，待显示画面对应的亮度增益值满足以下公式：
Figure PCTCN2020122957-appb-000001
其中，Gain表示所述待显示画面对应的亮度增益值，常数K表示基准显示画面的亮度信息基准值，APL为所述待显示画面对应的所述亮度信息，P为与所述环境光强度值对应 的亮度增益系数。
需要说明的是，待显示画面对应的亮度增益值也可以是满足该公式的其它变形公式。本申请对此并不作限制。
一种可能的实施方式中，第二背光亮度值满足如下公式：
L2＝Gain×L1
其中，L2表示所述第二背光亮度值，L1表示所述第一背光亮度值，Gain表示所述待显示画面对应的亮度增益值。
本申请实施例中，电子设备按照上述公式确定第二背光亮度值，可以解决相同环境照度下，不同显示内容亮度需求不一致问题，这样，在相同环境照度下，用户无需频繁调节亮度条。需要说明的是，第二背光亮度值满足上述公式的其它变形公式，本申请对此并不作限制。
一种可能的实施方式中，电子设备还可以采集待显示画面的前N-1帧显示画面的亮度信息，电子设备进一步对待显示画面的亮度信息和前N-1帧显示画面的亮度信息进行滤波处理，得到处理后的亮度信息，电子设备根据处理后的亮度信息，确定与待显示画面对应的亮度增益值。
本申请实施例中，电子设备按照上述方法可以实现对待显示画面的亮度信息进行平滑处理，防止显示画面的亮度值前后发生剧烈波动，以避免造成画面闪烁。
一种可能实施方式中，电子设备可以按照设定的步长将所述电子设备的显示屏的背光亮度调节至所述第二背光亮度值。
本申请实施例中，电子设备可以避免在背光调节过程中所述显示屏的背光亮度变化过于明显。
一种可能的实施方式中，所述调节步长是根据所述显示屏的当前背光亮度值与调节步长之间的对应关系确定的。
一种可能的实施方式中，待显示画面的亮度信息包括待显示画面的灰度平均像素亮度、所述待显示画面的RGB分量中最大分量的平均像素亮度、所述待显示画面的RGB分量中G分量的平均像素亮度。
第二方面，本申请实施例提供一种终端设备，包括传感器、触摸屏、处理器和存储器，其中，存储器用于存储一个或多个计算机程序；当存储器存储的一个或多个计算机程序被处理器执行时，使得该终端设备能够实现上述任一方面的任意一种可能的设计的方法。
第三方面，本申请实施例还提供一种装置，该装置包括执行上述任一方面的任意一种可能的设计的方法的模块/单元。这些模块/单元可以通过硬件实现，也可以通过硬件执行相应的软件实现。
第四方面，本申请实施例中还提供一种计算机可读存储介质，所述计算机可读存储介质包括计算机程序，当计算机程序在电子设备上运行时，使得所述电子设备执行上述任一方面的任意一种可能的设计的方法。
第五方面，本申请实施例还提供一种包含计算机程序产品，当所述计算机程序产品在终端上运行时，使得所述电子设备执行上述任一方面的任意一种可能的设计的方法。
第六方面，本申请实施例还提供一种芯片，所述芯片与存储器耦合，用于执行所述存储器中存储的计算机程序，以执行上述任一方面的任意一种可能的设计的方法。
附图说明
图1为本申请实施例提供的一组电子设备显示画面的示意图；
图2为本申请实施例提供的一种手机结构示意图；
图3为本申请实施例提供的一种安卓操作系统结构示意图；
图4为本申请实施例提供的一种电子设备的结构示意图；
图5为本申请实施例提供的一种背光调节方法流程示意图；
图6(a)为本申请实施例提供的一种P曲线示意图；
图6(b)为本申请实施例提供的一种背光亮度值和环境光强度值之间的对应关系；
图6(c)为本申请实施例提供的一种敏感度曲线示意图；
图7为本申请实施例提供的一组电子设备的显示内容示意图；
图8为本申请实施例提供的一种背光调节装置的结构示意图；
图9为本申请实施例提供的一种终端结构示意图。
具体实施方式
为了使本申请实施例的目的、技术方案和优点更加清楚，下面将结合说明书附图以及具体的实施方式对本申请实施例中的技术方案进行详细的说明。
以下，先对本申请实施例中的部分用语进行解释说明，以便于本领域技术人员理解。
1)、本申请实施例涉及的APP，简称应用，为能够实现某项或多项特定功能的软件程序。通常，终端设备中可以安装多个应用。比如，相机应用、邮箱应用、智能家居控制应用等。下文中提到的应用，可以是终端设备出厂时已安装的系统应用，也可以是用户在使用终端设备的过程中从网络下载或从其他终端设备获取的第三方应用。
2)、本申请实施例涉及的敏感度曲线可以预先存储在电子设备中。敏感度曲线表示背光亮度值和调节步长的对应关系，所述调节步长表示所述显示屏在对应的背光亮度值且人眼感知不到的情况下，所述显示屏的最大背光亮度变化值。敏感度曲线可以通过多个用户在不同环境下进行敏感测试的测试结果拟合得到，示例性地，如图6(c)所示，其中横轴为背光亮度范围，纵轴为调节步长。
现有技术中，即使电子设备根据周围环境光强度，自适应调整了显示屏的背光亮度，但是相同环境下，仍可能会出现有些显示内容可以被用户清晰查看，但有些显示内容因背光亮度不足导致不能用户清晰查看的问题。例如，图1中的(a)中，电子设备的显示界面为白底黑字，由于白色背景的亮度很高，所以电子设备会将显示屏的背光亮度调低，但是若用户将桌面背景调整为黑色(或者深色)的背景，如图1中的(b)所示，显示界面变为黑底白字，则由于黑色背景的亮度很低，所以电子设备仍沿用该环境下的显示屏的背光亮度值进行显示屏显示，就会出现亮度不足的问题。可见，即使在相同的环境光照条件下，由于显示屏显示的内容不同，所以用户对亮度的需求也是不同的，传统的背光调光方法根本无法满足这一需求。为此，本申请实施例提供一种背光调节方法，该方法可以在基于环境光强度值对背光调节进行调节的基础上，进一步根据显示画面的亮度信息对背光亮度进行调节，以达到灵活调整电子设备背光亮度的目的，确保显示屏的内容可以被用户清晰查看，提升用户使用体验。
为了使本申请实施例的目的、技术方案和优点更加清楚，下面将结合说明书附图以及 具体的实施方式对本申请实施例中的技术方案进行详细的说明。
本申请实施例公开的各个实施例可以应用于电子设备中。在一些实施例中，电子设备可以是包含诸如个人数字助理和/或音乐播放器等功能的便携式终端，诸如手机、平板电脑、具备无线通讯功能的可穿戴设备(如智能手表)、车载设备等。便携式终端的示例性实施例包括但不限于搭载
Figure PCTCN2020122957-appb-000002
或者其它操作系统的便携式终端。上述便携式终端也可以是诸如具有触敏表面(例如触控面板)的膝上型计算机(Laptop)等。还应当理解的是，在其他一些实施例中，上述终端也可以是具有触敏表面(例如触控面板)的台式计算机。
以电子设备是手机为例，图2示出了手机200的结构示意图。
手机200可以包括处理器210，外部存储器接口220，内部存储器221，USB接口230，充电管理模块240，电源管理模块241，电池242，天线1，天线2，移动通信模块251，无线通信模块252，音频模块270，扬声器270A，受话器270B，麦克风270C，耳机接口270D，传感器模块280，按键290，马达291，指示器292，摄像头293，显示屏294，以及SIM卡接口295等。其中传感器模块280可以包括环境光传感器280A(当然，手机100还可以包括其它传感器，比如、陀螺仪传感器，加速度传感器，接近光传感器、指纹传感器，触摸传感器、温度传感器，压力传感器、距离传感器、磁传感器、环境光传感器、气压传感器、骨传导传感器等，图中未示出)。
可以理解的是，本发明实施例示意的结构并不构成对手机200的具体限定。在本申请另一些实施例中，手机200可以包括比图示更多或更少的部件，或者组合某些部件，或者拆分某些部件，或者不同的部件布置。图示的部件可以以硬件，软件或软件和硬件的组合实现。
处理器210可以包括一个或多个处理单元，例如：处理器210可以包括应用处理器(application processor，AP)，调制解调处理器，图形处理器(graphics processing unit，GPU)，图像信号处理器(image signal processor,ISP)，控制器，存储器，视频编解码器，数字信号处理器(digital signal processor,DSP)，基带处理器，和/或神经网络处理器(Neural-network Processing Unit,NPU)等。其中，不同的处理单元可以是独立的器件，也可以集成在一个或多个处理器中。其中，控制器可以是手机200的神经中枢和指挥中心。控制器可以根据指令操作码和时序信号，产生操作控制信号，完成取指令和执行指令的控制。
处理器210中还可以设置存储器，用于存储指令和数据。在一些实施例中，处理器210中的存储器为高速缓冲存储器。该存储器可以保存处理器210刚用过或循环使用的指令或数据。如果处理器210需要再次使用该指令或数据，可从所述存储器中直接调用。避免了重复存取，减少了处理器210的等待时间，因而提高了系统的效率。
处理器210可以运行本申请实施例提供的背光调节方法，用于灵活调整电子设备背光亮度，确保显示屏的内容可以被清晰显示，提升用户使用体验。处理器210可以包括不同的器件，比如集成CPU和GPU时，CPU和GPU可以配合执行本申请实施例提供的背光调节方法，比如背光调节方法中部分算法由CPU执行，另一部分算法由GPU执行，以得到较快的处理效率。
显示屏294用于显示图像，视频等。显示屏294包括显示面板。显示面板可以采用液晶显示屏(liquid crystal display，LCD)，有机发光二极管(organic light-emitting diode，OLED)，有源矩阵有机发光二极体或主动矩阵有机发光二极体(active-matrix organic light emitting  diode的，AMOLED)，柔性发光二极管(flex light-emitting diode，FLED)，Miniled，MicroLed，Micro-oLed，量子点发光二极管(quantum dot light emitting diodes，QLED)等。在一些实施例中，手机200可以包括1个或N个显示屏294，N为大于1的正整数。
显示屏294与背光驱动IC294A连接，背光驱动IC 294A，用于控制所述显示屏294的背光亮度。在所述处理器210(或其中的协处理器)在实现对所述显示屏294的一次背光调节时，所述处理器210将本次调节的目标背光亮度值转换为特定格式的数据发送给所述背光驱动IC 294A，所述背光驱动IC 294A识别所述目标背光亮度值后，控制所述显示屏294的背光亮度变化，使所述显示屏的背光亮度调节到所述目标背光亮度值。所述特定格式的数据可以为脉冲占空比(Pulse Width Modulation，PWM)。在本申请实施例中，显示屏294可以是一个一体的柔性显示屏，也可以采用两个刚性屏以及位于两个刚性屏之间的一个柔性屏组成的拼接显示屏。当处理器210运行本申请实施例提供的背光调节方法后，处理器210可以控制显示屏294上的背光亮度。
摄像头293(前置摄像头或者后置摄像头，或者一个摄像头既可作为前置摄像头，也可作为后置摄像头)用于捕获静态图像或视频。通常，摄像头293可以包括感光元件比如镜头组和图像传感器，其中，镜头组包括多个透镜(凸透镜或凹透镜)，用于采集待拍摄物体反射的光信号，并将采集的光信号传递给图像传感器。图像传感器根据所述光信号生成待拍摄物体的原始图像。
内部存储器221可以用于存储计算机可执行程序代码，所述可执行程序代码包括指令。处理器210通过运行存储在内部存储器221的指令，从而执行手机200的各种功能应用以及数据处理。内部存储器221可以包括存储程序区和存储数据区。其中，存储程序区可存储操作系统，应用程序(比如相机应用，微信应用等)的代码等。存储数据区可存储手机200使用过程中所创建的数据(比如传感器采集的数据)等。
内部存储器221还可以存储本申请实施例提供的背光调节算法的代码。当内部存储器221中存储的背光调节算法的代码被处理器210运行时，处理器210可以控制显示屏294上的背光亮度。
此外，内部存储器221可以包括高速随机存取存储器，还可以包括非易失性存储器，例如至少一个磁盘存储器件，闪存器件，通用闪存存储器(universal flash storage，UFS)等。
当然，本申请实施例提供的背光调节算法的代码还可以存储在外部存储器中。这种情况下，处理器210可以通过外部存储器接口220运行存储在外部存储器中的背光调节算法的代码，处理器210可以控制显示屏294上的背光亮度。
下面介绍传感器模块280的功能。
环境光传感器280A可根据采集环境光的光照强度，使处理器210可以根据采集到的光照强度来调节显示屏294的背光亮度值。接近传感器可在所述手机200移动到耳边时，关闭所述显示屏294和/或背光。作为运动传感器的一种，加速计传感器可检测各个方向上(一般为三轴)加速度的大小，静止时可检测出重力的大小及方向，可用于识别手机姿态的应用(比如横竖屏切换、相关游戏、磁力计姿态校准)、振动识别相关功能(比如计步器、敲击)等；至于所述手机200还可配置的陀螺仪、气压计、湿度计、温度计、红外线传感器等其他传感器，在此不再赘述。
手机200的无线通信功能可以通过天线1，天线2，移动通信模块251，无线通信模块252，调制解调处理器以及基带处理器等实现。
天线1和天线2用于发射和接收电磁波信号。手机200中的每个天线可用于覆盖单个或多个通信频带。不同的天线还可以复用，以提高天线的利用率。例如：可以将天线1复用为无线局域网的分集天线。在另外一些实施例中，天线可以和调谐开关结合使用。
移动通信模块251可以提供应用在手机200上的包括2G/3G/4G/5G等无线通信的解决方案。移动通信模块251可以包括至少一个滤波器，开关，功率放大器，低噪声放大器(low noise amplifier，LNA)等。移动通信模块251可以由天线1接收电磁波，并对接收的电磁波进行滤波，放大等处理，传送至调制解调处理器进行解调。移动通信模块251还可以对经调制解调处理器调制后的信号放大，经天线1转为电磁波辐射出去。在一些实施例中，移动通信模块251的至少部分功能模块可以被设置于处理器210中。在一些实施例中，移动通信模块251的至少部分功能模块可以与处理器210的至少部分模块被设置在同一个器件中。
调制解调处理器可以包括调制器和解调器。其中，调制器用于将待发送的低频基带信号调制成中高频信号。解调器用于将接收的电磁波信号解调为低频基带信号。随后解调器将解调得到的低频基带信号传送至基带处理器处理。低频基带信号经基带处理器处理后，被传递给应用处理器。应用处理器通过音频设备(不限于扬声器270A，受话器270B等)输出声音信号，或通过显示屏294显示图像或视频。在一些实施例中，调制解调处理器可以是独立的器件。在另一些实施例中，调制解调处理器可以独立于处理器210，与移动通信模块251或其他功能模块设置在同一个器件中。
无线通信模块252可以提供应用在手机200上的包括无线局域网(wireless local area networks，WLAN)(如无线保真(wireless fidelity，Wi-Fi)网络)，蓝牙(bluetooth，BT)，全球导航卫星系统(global navigation satellite system，GNSS)，调频(frequency modulation，FM)，近距离无线通信技术(near field communication，NFC)，红外技术(infrared，IR)等无线通信的解决方案。无线通信模块252可以是集成至少一个通信处理模块的一个或多个器件。无线通信模块252经由天线2接收电磁波，将电磁波信号调频以及滤波处理，将处理后的信号发送到处理器210。无线通信模块252还可以从处理器210接收待发送的信号，对其进行调频，放大，经天线2转为电磁波辐射出去。
另外，手机200可以通过音频模块270，扬声器270A，受话器270B，麦克风270C，耳机接口270D，以及应用处理器等实现音频功能。例如音乐播放，录音等。手机200可以接收按键290输入，产生与手机200的用户设置以及功能控制有关的键信号输入。手机200可以利用马达291产生振动提示(比如来电振动提示)。手机200中的指示器292可以是指示灯，可以用于指示充电状态，电量变化，也可以用于指示消息，未接来电，通知等。手机200中的SIM卡接口295用于连接SIM卡。SIM卡可以通过插入SIM卡接口295，或从SIM卡接口295拔出，实现和手机200的接触和分离。
应理解，在实际应用中，手机200可以包括比图1所示的更多或更少的部件，本申请实施例不作限定。图示手机200仅是一个范例，并且手机200可以具有比图中所示出的更多的或者更少的部件，可以组合两个或更多的部件，或者可以具有不同的部件配置。图中所示出的各种部件可以在包括一个或多个信号处理和/或专用集成电路在内的硬件、软件、或硬件和软件的组合中实现。
电子设备的软件系统可以采用分层架构，事件驱动架构，微核架构，微服务架构，或云架构。本发明实施例以分层架构的Android系统为例，示例性说明电子设备的软件结构。 图3是本发明实施例的电子设备的软件结构框图。
分层架构将软件分成若干个层，每一层都有清晰的角色和分工。层与层之间通过软件接口通信。在一些实施例中，将Android系统分为四层，从上至下分别为应用程序层，应用程序框架层，安卓运行时(Android runtime)和系统库，以及内核层。
应用程序层可以包括一系列应用程序包。
如图3所示，应用程序包可以包括电话、相机，图库，日历，通话，地图，导航，WLAN，蓝牙，音乐，视频，短信息等应用程序。
应用程序框架层为应用程序层的应用程序提供应用编程接口(application programming interface，API)和编程框架。应用程序框架层包括一些预先定义的函数。
如图3所示，应用程序框架层可以包括窗口管理器，内容提供器，视图系统，电话管理器，资源管理器，通知管理器等。
窗口管理器用于管理窗口程序。窗口管理器可以获取显示屏大小，判断是否有状态栏，锁定屏幕，截取屏幕等。
内容提供器用来存放和获取数据，并使这些数据可以被应用程序访问。所述数据可以包括视频，图像，音频，拨打和接听的电话，浏览历史和书签，电话簿等。
视图系统包括可视控件，例如显示文字的控件，显示图片的控件等。视图系统可用于构建应用程序。显示界面可以由一个或多个视图组成的。例如，包括短信通知图标的显示界面，可以包括显示文字的视图以及显示图片的视图。
电话管理器用于提供电子设备的通信功能。例如通话状态的管理(包括接通，挂断等)。
资源管理器为应用程序提供各种资源，比如本地化字符串，图标，图片，布局文件，视频文件等等。
通知管理器使应用程序可以在状态栏中显示通知信息，可以用于传达告知类型的消息，可以短暂停留后自动消失，无需用户交互。比如通知管理器被用于告知下载完成，消息提醒等。通知管理器还可以是以图表或者滚动条文本形式出现在系统顶部状态栏的通知，例如后台运行的应用程序的通知，还可以是以对话窗口形式出现在屏幕上的通知。例如在状态栏提示文本信息，发出提示音，电子设备振动，指示灯闪烁等。
Android Runtime包括核心库和虚拟机。Android runtime负责安卓系统的调度和管理。
核心库包含两部分：一部分是java语言需要调用的功能函数，另一部分是安卓的核心库。
应用程序层和应用程序框架层运行在虚拟机中。虚拟机将应用程序层和应用程序框架层的java文件执行为二进制文件。虚拟机用于执行对象生命周期的管理，堆栈管理，线程管理，安全和异常的管理，以及垃圾回收等功能。
系统库可以包括多个功能模块。例如：表面管理器(surface manager)，媒体库(Media Libraries)，三维图形处理库(例如：OpenGL ES)，2D图形引擎(例如：SGL)等。
表面管理器用于对显示子系统进行管理，并且为多个应用程序提供了2D和3D图层的融合。
媒体库支持多种常用的音频，视频格式回放和录制，以及静态图像文件等。媒体库可以支持多种音视频编码格式，例如：MPEG4,H.264,MP3,AAC,AMR,JPG,PNG等。
三维图形处理库用于实现三维图形绘图，图像渲染，合成，和图层处理等。
2D图形引擎是2D绘图的绘图引擎。
内核层是硬件和软件之间的层。内核层至少包含显示驱动，摄像头驱动，音频驱动，传感器驱动。
下面结合本申请实施例的背光调节方法，示例性说明电子设备的软件以及硬件的工作流程。
作为一种示例，如图2所示，硬件层中的环境光传感器(例如图2中的环境光传感器280A)可以采集数据，处理器210从电子设备的各个环境光传感器280A获取在N个采样时刻所采集的环境光强度值。另外，处理器210从电子设备的显示器294获取待显示画面的亮度信息，统计得到待显示画面的画面平均亮度(average picture level，APL)。处理器210根据环境光强度值，确定与该环境光强度对应的第一背光亮度值，然后基于APL对应的增益系数对第一背光亮度值进行调整，得到第二背光亮度值。处理器210将第二背光亮度值转换为脉冲宽度调制(pulse width modulation，PWM)信号发送给背光驱动IC 294A，所述背光驱动IC 294A调整显示屏294的背光亮度至第二背光亮度值。
图4为本申请实施例所提供的背光调节方法适用的电子设备的结构示意图。其中，图4中的(a)示出了一种曲面屏，曲面屏的边缘有一定的曲率；图4中的(b)示出了一种全面屏，全面屏的侧边不弯曲；图4中的(c)和(d)示出了一种折叠屏，图4中的(c)为折叠屏处于半折叠状态，图4中的(d)为折叠屏处于完全折叠状态，当折叠屏处于半折叠状态或者完全折叠状态时，可弯折区域为折叠屏的边缘显示区域。本申请实施例中，可以在图4中的壳体或显示屏上可以设置环境光传感器280A。
为了更加清晰的描述本申请实施例的技术方案，下面结合图5，对本申请实施例提供的一种背光调节方法的流程进行描述。其中，所述方法应用于具有显示屏的各类电子设备中，其中，所述电子设备中包含处理器、环境光传感器和背光驱动IC。所述电子设备可以为如图2所示的手机200。参阅图5所示，该方法具体包括如下步骤。
步骤501，电子设备的处理器210获取环境光传感器所采集的环境光强度值。
可选的，触发电子设备执行上述步骤401的条件可以是：电子设备的显示屏正在显示内容，或者电子设备接收到用户的触控指令、又或者电子设备确定自身所处环境的环境光发生变化时等。
在一种可能的实现中，电子设备的环境光传感器可以按照固定采样频率，采集电子设备当前的使用场景下的环境光的光照强度，得到多个环境光强度值。电子设备可以对多个环境光强度值加权求平均得到处理后的环境光强度值。或者，电子设备可以先对多个环境光强度值进行过滤处理(例如，采用有限冲激响应(Finite Impulse Response，FIR)滤波器进行过滤处理)后再加权求平均得到处理后的环境光强度值。
步骤502，电子设备的处理器210确定与该环境光强度值对应的第一背光亮度值。
在该步骤中，电子设备的处理器根据环境光强度值和背光亮度值之间的对应关系，确定与该环境光强度值对应的第一背光亮度值。其中，该环境光强度值可以是上述处理后的环境光强度值。
需要说明的是，本申请实施例中，在执行步骤502之前，电子设备需要预先通过环境传感器采集环境光强度值，根据环境光强度值变化趋势，确定不同环境光强度值对应的背光亮度值，即电子设备需要预先生成光照强度值和背光亮度值之间的对应关系。具体地，用户可以自定义亮度基准值，该亮度基准值可是用户感觉最舒服的背光亮度值，或者开发 人员可以在电子设备中预设亮度基准值。基于该亮度基准值时，电子设备建立环境光强度值与背光亮度值之间的对应的关系。在本申请实施例中，环境光强度值的单位为勒克斯(Lux)，背光亮度值的单位为尼特(nit)。
步骤503，电子设备的处理器210获取待显示画面的亮度信息，根据待显示画面的亮度信息，确定与待显示画面对应的亮度增益值。
其中，亮度信息可以是画面平均亮度(average pixel level，AVL)。APL反映显示内容平均灰阶级，即内容明暗度。APL可以是待显示画面的灰度平均像素亮度，或者APL是待显示画面的RGB分量中最大分量的平均像素亮度，或者APL是待显示画面的RGB分量中G分量的平均像素亮度。
具体地，在一种可能的实现中，电子设备的处理器可以按照如下公式一计算待显示画面对应的亮度增益值：
Figure PCTCN2020122957-appb-000003
其中，Gain表示待显示画面对应的亮度增益值，常数K表示基准显示画面的亮度信息基准值，APL为待显示画面对应的所述亮度信息，P为与环境光强度值对应的亮度增益系数。
其中，P是变量，P的大小与环境光强度值相关，例如P对应的曲线图如图6(a)所示，P曲线可以通过开发人员多次实验获得，P曲线可采用一维查找1D-lut(一维查色表)实现。一般来说，基准显示画面为全白画面时，亮度增益值对应的曲线如图6(b)所示。
举例来说，当基准显示画面为全白画面时，常数K可以是1。当待显示画面也是全白画面，则APL也为1，因此Gain等于1。当待显示画面的APL<1时，Gain通常大于1。再比如，待显示画面为纯黑画面时，APL＝0，假设P的取值为0.3，则纯黑画面对应亮度增益
Figure PCTCN2020122957-appb-000004
需要说明的是，待显示画面对应的亮度增益值也可以是满足上述公式一的其它变形得到的公式，本申请对此并不作具体限定。
步骤504，电子设备的处理器210根据第一背光亮度值和亮度增益值，确定第二背光亮度值。
具体地，在一种可能的实现中，电子设备的处理器可以按照如下公式二计算待显示画面对应的第二背光亮度值：L2＝Gain×L1.....公式二
其中，L2表示所述第二背光亮度值，L1表示所述第一背光亮度值，Gain表示所述待显示画面对应的亮度增益值。
需要说明的是，待显示画面对应的第二背光亮度值也可以是满足上述公式二的其它变形得到的公式，本申请对此并不作具体限定。
步骤505，电子设备的处理器210根据所述第二背光亮度值，调节所述电子设备的显示屏的背光亮度。
在一种可能的实现中，电子设备可以根据显示屏的当前背光亮度值与调节步长之间的对应关系确定调节步长，其中，敏感度曲线包括背光亮度值和调节步长之间的对应关系，示例性地如图6(c)所示，按照该调节步长对亮度进行调节，可以实现在用户无感知的情况下，对显示屏的背光亮度进行调节。其中，在背光调节过程中，调节步长可以是动态变化的，例如，当显示屏的背光亮度值越大时，调节步长越小。
考虑电子设备所处的环境不同，一种情况下，在所述电子设备所处环境光发生渐变的情况下，所述处理器确定每次背光调节的调节步长小于或等于敏感度曲线中查找到的调节步长，此时，所述处理器在进行背光调节的过程中，用户的人眼完全无感知显示屏的背光亮度变化。
另一种情况下，在所述电子设备所处环境光发生突变的情况下，所述处理器确定的每次背光调节的调节步长略大于敏感度曲线中查找到的调节步长，使所述处理器尽快的调整到目标背光亮度值，同时，也使用户人眼尽快适应环境光的变化，此时，处理器在进行背光调节的过程中，用户的人眼可以略微感知显示屏的背光亮度变化。
在一种可能的实现中，上述步骤503中，电子设备还可以采集待显示画面的前N-1帧显示画面的亮度信息，对所述待显示画面的亮度信息和前N-1帧显示画面的亮度信息进行滤波处理，得到处理后的亮度信息，根据所述处理后的亮度信息，确定与所述待显示画面对应的亮度增益值。具体地，电子设备的处理器利用FIR滤波器进行滤波处理，并通过调整FIR滤波器的阶数、截止频率以及衰减程度等性能参数，滤除多个APL中的毛刺、抖动等噪声。利用FIR滤波器的高保真等特性过滤后的所述多个APL可以避免画面发送闪烁，进而也提高了用户体验。需要说明的是，本申请实施例中，并不限定APL的统计间隔，可以连续统计N-1帧显示画面，也可以隔若干帧统计一次。
上述步骤505中，在一种可能的实现是，电子设备的处理器将背光调节至第二背光亮度值，另一种可能的实现是，当第二背光亮度值大于背光亮度的最大亮度值时，调节电子设备的显示屏的背光亮度为最大亮度值。也就是说，受限于OLED显示屏的硬件约束，本申请实施例中会预设最大亮度值，第二亮度调节值不会大于该最大亮度值。
举例来说，下面以电子设备为手机为例，手机中预存储有环境光强度值和背光亮度值之间的对应关系，公式一、公式二以及基准显示画面的亮度信息基准值K、P曲线。当用户使用该手机上网时，手机的环境光传感器检测到的当前环境光强度值，如300lux。手机根据环境光强度值和背光亮度值之间的对应关系，确定与环境光强度值对应的第一背光亮度值，例如100nit。进一步地，因手机当前显示的游戏应用的显示画面，因此手机获取游戏应用的显示画面的APL，手机利用公式一、公式二以及基准显示画面的亮度信息基准值K、P曲线和APL，计算得到亮度增益值，例如Gain等于1.3。最终，手机计算得到100nit乘以1.3等于130nit。手机的处理器继续通过人眼敏感曲线可知，假设当前背光亮度为90nit，与当前背光亮度90nit对应的调节步长为1.8nit，因此，所述处理器将当前背光调节的背光亮度值与调节步长之间的差值或和值(例如90+1.8＝91.8)发送给所述背光驱动IC，以使所述背光驱动IC将所述显示屏的背光亮度调节为该差值或和值(例如91.8nit)；如此反复，直至处理器将显示屏的背光亮度调节为130nit。可见，这样可以使得游戏应用的显示画面有充分的亮度，对于大型游戏，内容较暗且复杂，且部分竞技类游戏，用户为了获得更好的战绩，较高的显示亮度有利于用户及时发现对战者，所以该方法可以提升用户的体验。
再比如，如图7所示，手机的显示屏显示如图7中的(a)所示的界面，当前显示内容为白底黑字，假设用户修改的手机的电子书应用的背景色为黑色(或深色)，如图7中的(b)所示的界面，则手机获取当前显示内容的APL以及前N-1帧画面的APL，对这N帧画面进行处理，得到处理后的APL，假设手机确定当前环境没有改变，即环境光强度值未变化，则手机根据处理后的APL确定亮度增益值，根据该亮度增益值和当前背光亮度值之间的乘积，确定第二背光亮度值，手机的处理器向背光驱动IC发送与该第二背光亮度值 对应的PWM信号，控制调整显示屏的背光调节至该第二背光亮度值。
综上，电子设备在对背光进行调节时，综合考虑了周围环境光与显示内容的亮度信息两个因素，因此背光亮度的调整更加灵活，利用该方法可以实现即使环境相同，当电子设备的显示内容不同时，电子设备的背光也会进行自适应调节，从而确保显示屏的内容可以被用户清晰查看，提升用户使用体验。
基于以上实施例，本申请实施例提供了一种背光调节装置，该装置应用于具有显示屏的电子设备中，用于实现如图5所示的背光调节方法，所述电子设备中不仅包含所述装置，还包含环境光传感器和背光驱动IC，参阅图8所示，所述装置800包括：获取单元801和处理单元802，其中，
获取单元801，用于获取电子设备周围环境的环境光强度值和电子设备的待显示画面的亮度信息；
处理单元802，用于根据环境光强度值，确定与环境光强度值对应的第一背光亮度值；根据待显示画面的亮度信息，确定与待显示画面对应的亮度增益值；根据第一背光亮度值和亮度增益值，确定第二背光亮度值；根据第二背光亮度值，调节电子设备的显示屏的背光亮度。
可选的，待显示画面对应的亮度增益值满足以下公式一，另外，第二背光亮度值满足如下公式二。
在一种可能的实现方式中，电子设备还采集待显示画面的前N-1帧显示画面的亮度信息，对所述待显示画面的亮度信息和所述前N-1帧显示画面的亮度信息进行滤波处理，得到处理后的亮度信息，电子设备可以根据所述处理后的亮度信息，确定与所述待显示画面对应的亮度增益值。
在一种可能的实现方式中，电子设备按照调节步长，将所述电子设备的显示屏的背光亮度调节至所述第二背光亮度值。
在一种可能的实现方式中，当所述第二背光亮度值大于所述背光亮度的最大亮度值时，电子设备调节所述电子设备的显示屏的背光亮度为所述最大亮度值。
采用本发明实施例提供的背光调节装置，所述装置获取多个环境光照强度值和待显示画面的亮度信息后，在背光调节时，综合考虑了周围环境光与显示内容的亮度信息两个因素，因此背光亮度的调整更加灵活，利用该方法可以实现即使环境相同，当电子设备的显示内容不同时，电子设备的背光也会进行自适应调节，从而确保显示屏的内容可以被用户清晰查看，提升用户使用体验，电子设备的背光调节比较及时且精度较高，节省了所述电子设备的功耗。
需要说明的是，本申请实施例中对单元的划分是示意性的，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式。在本申请的实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)或处理器(processor)执行本申请各个 实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、磁碟或者光盘等各种可以存储程序代码的介质。
基于以上实施例，本发明实施例还提供了一种电子设备，用于实现如图9所示的背光调节方法，且具有如图8所示的背光调节装置800的功能，参阅图9所示，所述电子设备900中包括：收发器901、处理器902、总线903、存储器904、环境光传感器905、背光驱动IC 906，以及显示屏907，其中，
所述收发器901和所述处理器902、所述存储器904、所述环境光传感器905以及背光驱动IC 906通过所述总线903相互连接，所述背光驱动IC906与所述显示屏907之间也通过所述总线903连接；所述总线903可以是外设部件互连标准(peripheral component interconnect，简称PCI)总线或扩展工业标准结构(extended industry standard architecture，简称EISA)总线等。所述总线可以分为地址总线、数据总线、控制总线等。为便于表示，图9中仅用一条粗线表示，但并不表示仅有一根总线或一种类型的总线。
所述收发器901，用于与其他设备进行通信交互。
所述环境光传感器905，用于采集所述电子设备900所处环境的环境光的多个光照强度采样值，并发送给所述处理器902；
所述背光驱动IC 906，用于接收所述处理器902发送的背光亮度值，控制所述显示屏907的背光亮度调整到所述背光亮度值。
所述处理器902，用于实现如图5所示的背光调节方法，
采用本申请实施例提供的电子设备，所述电子设备获取多个环境光照强度值和待显示画面的亮度信息后，在背光调节时，综合考虑了周围环境光与显示内容的亮度两个因素，因此背光亮度的调整更加灵活，利用该方法可以实现即使环境相同，当电子设备的显示内容不同时，电子设备的背光也会进行自适应调节，从而确保显示屏的内容可以被用户清晰查看，提升用户使用体验，电子设备的背光调节比较及时且精度较高，节省了所述电子设备的功耗。
本申请实施例还提供一种计算机存储介质，该计算机存储介质中存储有计算机指令，当该计算机指令在电子设备上运行时，使得电子设备执行上述相关方法步骤实现上述实施例中的方法。
本申请实施例还提供了一种计算机程序产品，当该计算机程序产品在计算机上运行时，使得计算机执行上述相关步骤，以实现上述实施例中的方法。
另外，本申请的实施例还提供一种装置，这个装置具体可以是芯片，组件或模块，该装置可包括相连的处理器和存储器；其中，存储器用于存储计算机执行指令，当装置运行时，处理器可执行存储器存储的计算机执行指令，以使芯片执行上述各方法实施例中的方法。
通过以上实施方式的描述，所属领域的技术人员可以了解到，为描述的方便和简洁，仅以上述各功能模块的划分进行举例说明，实际应用中，可以根据需要而将上述功能分配由不同的功能模块完成，即将装置的内部结构划分成不同的功能模块，以完成以上描述的全部或者部分功能。
在本申请所提供的几个实施例中，应该理解到，所揭露的装置和方法，可以通过其他的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，模块或单元的划分， 仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个装置，或一些特征可以丢弃，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其他的形式。
作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是一个物理单元或多个物理单元，即可以位于一个地方，或者也可以分布到多个不同地方。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。
集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个可读取存储介质中。基于这样的理解，本申请实施例的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来，该软件产品存储在一个存储介质中，包括若干指令用以使得一个设备(可以是单片机，芯片等)或处理器(processor)执行本申请各个实施例方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(read only memory，ROM)、随机存取存储器(random access memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上内容，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以权利要求的保护范围为准。

Claims (18)

  1. 一种背光调节方法，应用于电子设备，其特征在于，包括：
    获取所述电子设备周围环境的环境光强度值和所述电子设备的待显示画面的亮度信息；
    根据所述环境光强度值，确定与所述环境光强度值对应的第一背光亮度值；
    根据所述待显示画面的亮度信息，确定与所述待显示画面对应的亮度增益值；
    根据所述第一背光亮度值和所述亮度增益值，确定第二背光亮度值；
    根据所述第二背光亮度值，调节所述电子设备的显示屏的背光亮度。
  2. 根据权利要求1所述的方法，其特征在于，
    所述待显示画面对应的亮度增益值满足以下公式：
    Figure PCTCN2020122957-appb-100001
    其中，Gain表示所述待显示画面对应的亮度增益值，常数K表示基准显示画面的亮度信息基准值，APL为所述待显示画面对应的所述亮度信息，P为与所述环境光强度值对应的亮度增益系数。
  3. 根据权利要求1或2所述的方法，其特征在于，
    所述第二背光亮度值满足如下公式：
    L2＝Gain×L1
    其中，L2表示所述第二背光亮度值，L1表示所述第一背光亮度值，Gain表示所述待显示画面对应的亮度增益值。
  4. 根据权利要求1至3任一项所述的方法，其特征在于，所述方法还包括：
    采集所述待显示画面的前N-1帧显示画面的亮度信息；
    根据所述待显示画面的亮度信息，确定与所述待显示画面对应的亮度增益值之前，还包括：
    对所述待显示画面的亮度信息和所述前N-1帧显示画面的亮度信息进行滤波处理，得到处理后的亮度信息；
    所述根据所述待显示画面的亮度信息，确定与所述待显示画面对应的亮度增益值，包括：
    根据所述处理后的亮度信息，确定与所述待显示画面对应的亮度增益值。
  5. 根据权利要求1至4任一项所述的方法，其特征在于，所述根据所述第二背光亮度值，调节所述电子设备的显示屏的背光亮度，包括：
    按照调节步长，将所述电子设备的显示屏的背光亮度调节至所述第二背光亮度值。
  6. 根据权利要求1至5任一项所述的方法，其特征在于，所述调节步长是根据所述显示屏的当前背光亮度值与调节步长之间的对应关系确定的。
  7. 根据权利要求1至6任一项所述的方法，其特征在于，根据所述第二背光亮度值，调节所述电子设备的显示屏的背光亮度，包括：
    当所述第二背光亮度值大于所述背光亮度的最大亮度值时，调节所述电子设备的显示屏的背光亮度为所述最大亮度值。
  8. 根据权利要求1至7任一项所述的方法，其特征在于，所述待显示画面的亮度信息包括以下至少一个：待显示画面的灰度平均像素亮度、所述待显示画面的RGB分量中最大分量的平均像素亮度、所述待显示画面的RGB分量中G分量的平均像素亮度。
  9. 一种电子设备，其特征在于，所述电子设备包括显示屏、处理器和存储器；
    所述存储器存储有程序指令；
    所述处理器用于运行所述存储器存储的所述程序指令，使得所述电子设备执行：
    获取所述电子设备周围环境的环境光强度值和所述电子设备的待显示画面的亮度信息；
    根据所述环境光强度值，确定与所述环境光强度值对应的第一背光亮度值；
    根据所述待显示画面的亮度信息，确定与所述待显示画面对应的亮度增益值；
    根据所述第一背光亮度值和所述亮度增益值，确定第二背光亮度值；
    根据所述第二背光亮度值，调节所述电子设备的显示屏的背光亮度。
  10. 根据权利要求9所述的电子设备，其特征在于，所述待显示画面对应的亮度增益值满足以下公式：
    Figure PCTCN2020122957-appb-100002
    其中，Gain表示所述待显示画面对应的亮度增益值，常数K表示基准显示画面的亮度信息基准值，APL为所述待显示画面对应的所述亮度信息，P为与所述环境光强度值对应的亮度增益系数。
  11. 根据权利要求9或10所述的电子设备，其特征在于，所述第二背光亮度值满足如下公式：
    L2＝Gain×L1
    其中，L2表示所述第二背光亮度值，L1表示所述第一背光亮度值，Gain表示所述待显示画面对应的亮度增益值。
  12. 根据权利要求9至11任一项所述的电子设备，其特征在于，所述处理器用于运行所述存储器存储的所述程序指令，使得所述电子设备还执行：
    采集所述待显示画面的前N-1帧显示画面的亮度信息；
    对所述待显示画面的亮度信息和所述前N-1帧显示画面的亮度信息进行滤波处理，得到处理后的亮度信息；
    所述处理器用于运行所述存储器存储的所述程序指令，使得所述电子设备具体执行：
    根据所述处理后的亮度信息，确定与所述待显示画面对应的亮度增益值。
  13. 根据权利要求9至12任一项所述的电子设备，其特征在于，所述处理器用于运行所述存储器存储的所述程序指令，使得所述电子设备具体执行：
    按照调节步长，将所述电子设备的显示屏的背光亮度调节至所述第二背光亮度值。
  14. 根据权利要求9至13任一项所述的电子设备，其特征在于，所述调节步长是根据所述显示屏的当前背光亮度值与调节步长之间的对应关系确定的。
  15. 根据权利要求9至14任一项所述的电子设备，其特征在于，所述处理器用于运行所述存储器存储的所述程序指令，使得所述电子设备具体执行：
    当所述第二背光亮度值大于所述背光亮度的最大亮度值时，调节所述电子设备的显示屏的背光亮度为所述最大亮度值。
  16. 根据权利要求9至15任一项所述的电子设备，其特征在于，所述待显示画面的亮度信息包括以下至少一个：待显示画面的灰度平均像素亮度、所述待显示画面的RGB分量中最大分量的平均像素亮度、所述待显示画面的RGB分量中G分量的平均像素亮度。
  17. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质包括程序指令，当所述程序指令在电子设备上运行时，使得所述电子设备执行如权利要求1至8任一项所述的方法。
  18. 一种芯片，其特征在于，所述芯片与存储器耦合，用于执行所述存储器中存储的计算机程序，以执行如权利要求1至8任一项所述的方法。
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